ci: add multiple version test strategy for java sdk

.github/workflows/browser-ci.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         rust:
           - stable
     steps:

.github/workflows/ci-go.yml

@@ -34,6 +34,6 @@ jobs:
       - name: Test Go Host SDK
         run: |
           go version
-          LD_LIBRARY_PATH=/usr/local/lib go test
           cd go
-          LD_LIBRARY_PATH=/usr/local/lib go run main.go | grep "Hello from Go!"
+          LD_LIBRARY_PATH=/usr/local/lib go run main.go
+          LD_LIBRARY_PATH=/usr/local/lib go test

.github/workflows/ci-java.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        version: [11, 17]
+        version: [8, 11, 17]
         rust:
           - stable
     steps:
@@ -33,5 +33,10 @@ jobs:
       - name: Test Java
         run: |
           cd java
+          cat pom.xml | sed 's/<java.version>17/<java.version>${{ matrix.version }}/' > updated.xml
+          mv updated.xml pom.xml
           mvn --batch-mode -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn verify
-
+      #- name: Examine logs
+      #  if: success() || failure()
+      #  run: |
+      #    cat /tmp/extism.log

.github/workflows/ci-zig.yml

@@ -18,7 +18,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        zig_version: ["master"] # eventually use multiple versions once stable
         rust:
           - stable
     steps:
@@ -27,8 +26,6 @@ jobs:
       - uses: ./.github/actions/extism
       - name: Setup Zig env
         uses: goto-bus-stop/setup-zig@v2
-        with: 
-          version: ${{ matrix.zig_version }}
 
       - name: Test Zig Host SDK
         run: |

.github/workflows/release-haskell.yaml

@@ -1,7 +1,7 @@
 on:
   workflow_dispatch:
 
-name: Release Haskell SDK
+name: Release Rust SDK
 
 jobs:
   release-sdks:
@@ -10,6 +10,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      
       - uses: cachix/haskell-release-action@v1
         with:
           - hackage-token: "${{ secrets.HACKAGE_TOKEN }}"

.github/workflows/release-rust.yaml

@@ -19,19 +19,15 @@ jobs:
           override: true
           target: ${{ matrix.target }}
 
-      - name: Release Rust Manifest Crate
-        env:
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_API_TOKEN }}
-        run: |
-          # order of crate publication matter: manifest, runtime, rust
-          cargo publish --manifest-path manifest/Cargo.toml
-          # allow for crates.io to update so dependant crates can locate extism-manifest
-          sleep 5 
-
       - name: Release Rust Host SDK
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_API_TOKEN }}
         run: |
+          # order of crate publication matter: manifest, runtime, rust
+
+          cargo publish --manifest-path manifest/Cargo.toml
+          # allow for crates.io to update so dependant crates can locate extism-manifest
+          sleep 5 
 
           cargo publish --manifest-path runtime/Cargo.toml --no-verify
           cargo publish --manifest-path rust/Cargo.toml

.gitignore

@@ -30,15 +30,9 @@ rust/test.log
 duniverse
 _build
 php/Extism.php
-python/docs
 dist-newstyle
 .stack-work
 vendor
 zig/zig-*
 zig/example-out/
 zig/*.log
-java/*.iml
-java/*.log
-java/.idea
-java/.DS_Store
-

Cargo.toml

@@ -4,5 +4,5 @@ members = [
   "runtime",
   "rust",
   "libextism",
+  "elixir/native/extism_nif"
 ]
-exclude = ["kernel"]

Makefile

@@ -18,23 +18,21 @@ else
 	FEATURE_FLAGS=--features $(FEATURES)
 endif
 
-build:
-	cargo build --release $(FEATURE_FLAGS) --manifest-path libextism/Cargo.toml
 
-.PHONY: kernel
-kernel:
-	cd kernel && bash build.sh
+.PHONY: build
 
 lint:
 	cargo clippy --release --no-deps --manifest-path runtime/Cargo.toml
 
+build:
+	cargo build --release $(FEATURE_FLAGS) --manifest-path libextism/Cargo.toml
+
 debug:
 	RUSTFLAGS=-g $(MAKE) build
 
 install:
-	mkdir -p $(DEST)/lib $(DEST)/include
-	install runtime/extism.h $(DEST)/include/extism.h
-	install target/release/libextism.$(SOEXT) $(DEST)/lib/libextism.$(SOEXT)
+	install runtime/extism.h $(DEST)/include
+	install target/release/libextism.$(SOEXT) $(DEST)/lib
 
 uninstall:
 	rm -f $(DEST)/include/extism.h $(DEST)/lib/libextism.$(SOEXT)

README.md

@@ -1,8 +1,6 @@
 ### _Welcome!_
 
-**Please note:** This project still under active development and APIs may change until we hit v1.0.
-
-If you're interested in working on or building with Extism, please join our [Discord](https://discord.gg/cx3usBCWnc) and let us know - we are happy to help get you started.
+**Please note:** this project still under active development. It's usable, but expect some rough edges while work is underway. If you're interested in working on or building with Extism, please join our [Discord](https://discord.gg/cx3usBCWnc) and let us know - we are happy to help get you started.
 
 [![Discord](https://img.shields.io/discord/1011124058408112148?color=%23404eed&label=Community%20Chat&logo=Discord&logoColor=%23404eed)](https://discord.gg/cx3usBCWnc)
 
@@ -64,4 +62,5 @@ Extism is an open-source product from the team at:
 </p>
 
 
+
 _Reach out and tell us what you're building! We'd love to help._

browser/index.html

@@ -103,11 +103,7 @@
         }
 
         async loadFunctions(url) {
-            let helloWorld = function(index){
-              console.log("Hello, " + this.allocator.getString(index));
-              return index;
-            };
-            let plugin = await this.extismContext.newPlugin({ "wasm": [ { "path": url } ] }, {"hello_world": helloWorld});
+            let plugin = await this.extismContext.newPlugin({ "wasm": [ { "path": url } ] }) 
             let functions = Object.keys(await plugin.getExports())
             console.log("funcs ", functions)
             this.setState({functions})
@@ -139,13 +135,7 @@
 
         async handleOnRun(e) {
           e && e.preventDefault && e.preventDefault();
-          let helloWorld = function(index){
-            console.log("Hello, " + this.allocator.getString(index));
-            return index;
-          };
-          let plugin = await this.extismContext.newPlugin({ "wasm": [ { "path": this.state.url } ] }, {
-              "hello_world": helloWorld
-          });
+          let plugin = await this.extismContext.newPlugin({ "wasm": [ { "path": this.state.url } ] }) 
           let result = await plugin.call(this.state.func_name, this.state.input)
           let output = result
           this.setState({output})

browser/jest.config.js

@@ -1,5 +1,5 @@
 /** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
 module.exports = {
   preset: 'ts-jest',
-  testEnvironment: 'jsdom',
+  testEnvironment: 'node',
 };

browser/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@extism/runtime-browser",
-  "version": "0.3.0",
+  "version": "0.2.2",
   "description": "Extism runtime in the browser",
   "scripts": {
     "build": "node build.js && tsc --emitDeclarationOnly --outDir dist",
@@ -23,9 +23,7 @@
   "devDependencies": {
     "@types/jest": "^29.2.2",
     "esbuild": "^0.15.13",
-    "esbuild-jest": "^0.5.0",
     "jest": "^29.2.2",
-    "jest-environment-jsdom": "^29.3.1",
     "prettier": "^2.7.1",
     "ts-jest": "^29.0.3",
     "tslint": "^6.1.3",
@@ -34,6 +32,6 @@
     "typescript": "^4.8.4"
   },
   "dependencies": {
-    "@bjorn3/browser_wasi_shim": "^0.2.7"
+    "@bjorn3/browser_wasi_shim": "^0.2.1"
   }
 }

browser/src/context.ts

@@ -1,5 +1,5 @@
 import { Manifest, PluginConfig, ManifestWasmFile, ManifestWasmData } from './manifest';
-import { ExtismPlugin } from './plugin';
+import ExtismPlugin from './plugin';
 
 /**
  * Can be a {@link Manifest} or just the raw bytes of the WASM module as an ArrayBuffer.
@@ -20,7 +20,7 @@ export default class ExtismContext {
    * @param config - Config details for the plugin
    * @returns A new Plugin scoped to this Context
    */
-  async newPlugin(manifest: ManifestData, functions: Record<string, any> = {}, config?: PluginConfig) {
+  async newPlugin(manifest: ManifestData, config?: PluginConfig) {
     let moduleData: ArrayBuffer | null = null;
     if (manifest instanceof ArrayBuffer) {
       moduleData = manifest;
@@ -40,6 +40,6 @@ export default class ExtismContext {
       throw Error(`Unsure how to interpret manifest ${manifest}`);
     }
 
-    return new ExtismPlugin(moduleData, functions, config);
+    return new ExtismPlugin(moduleData, config);
   }
 }

browser/src/index.test.ts

@@ -8,17 +8,16 @@ function parse(bytes: Uint8Array): any {
 
 describe('', () => {
   it('can load and call a plugin', async () => {
-    // const data = fs.readFileSync(path.join(__dirname, '..', 'data', 'code.wasm'));
-    // const ctx = new ExtismContext();
-    // const plugin = await ctx.newPlugin({ wasm: [{ data: data }] });
-    // const functions = await plugin.getExports();
-    // expect(Object.keys(functions).filter((x) => !x.startsWith('__') && x !== 'memory')).toEqual(['count_vowels']);
-    // let output = await plugin.call('count_vowels', 'this is a test');
-    // expect(parse(output)).toEqual({ count: 4 });
-    // output = await plugin.call('count_vowels', 'this is a test again');
-    // expect(parse(output)).toEqual({ count: 7 });
-    // output = await plugin.call('count_vowels', 'this is a test thrice');
-    // expect(parse(output)).toEqual({ count: 6 });
-    expect(true).toEqual(true);
+    const data = fs.readFileSync(path.join(__dirname, '..', 'data', 'code.wasm'));
+    const ctx = new ExtismContext();
+    const plugin = await ctx.newPlugin({ wasm: [{ data: data }] });
+    const functions = await plugin.getExports();
+    expect(Object.keys(functions).filter((x) => !x.startsWith('__') && x !== 'memory')).toEqual(['count_vowels']);
+    let output = await plugin.call('count_vowels', 'this is a test');
+    expect(parse(output)).toEqual({ count: 4 });
+    output = await plugin.call('count_vowels', 'this is a test again');
+    expect(parse(output)).toEqual({ count: 7 });
+    output = await plugin.call('count_vowels', 'this is a test thrice');
+    expect(parse(output)).toEqual({ count: 6 });
   });
 });

browser/src/index.ts

@@ -1,4 +1,3 @@
 import ExtismContext from './context';
-import { ExtismFunction, ExtismPlugin } from './plugin';
 
-export { ExtismContext, ExtismFunction, ExtismPlugin };
+export { ExtismContext };

browser/src/plugin.ts

@@ -1,10 +1,9 @@
 import Allocator from './allocator';
 import { PluginConfig } from './manifest';
-import { WASI, Fd } from '@bjorn3/browser_wasi_shim';
+//@ts-ignore TODO add types to this library
+import { WASI, File } from "@bjorn3/browser_wasi_shim";
 
-export type ExtismFunction = any;
-
-export class ExtismPlugin {
+export default class ExtismPlugin {
   moduleData: ArrayBuffer;
   allocator: Allocator;
   config?: PluginConfig;
@@ -12,16 +11,14 @@ export class ExtismPlugin {
   input: Uint8Array;
   output: Uint8Array;
   module?: WebAssembly.WebAssemblyInstantiatedSource;
-  functions: Record<string, ExtismFunction>;
 
-  constructor(moduleData: ArrayBuffer, functions: Record<string, ExtismFunction> = {}, config?: PluginConfig) {
+  constructor(moduleData: ArrayBuffer, config?: PluginConfig) {
     this.moduleData = moduleData;
     this.allocator = new Allocator(1024 * 1024);
     this.config = config;
     this.vars = {};
     this.input = new Uint8Array();
     this.output = new Uint8Array();
-    this.functions = functions;
   }
 
   async getExports(): Promise<WebAssembly.Exports> {
@@ -68,31 +65,23 @@ export class ExtismPlugin {
     const environment = this.makeEnv();
     const args: Array<string> = [];
     const envVars: Array<string> = [];
-    let fds: Fd[] = [
-      // new XtermStdio(term), // stdin
-      // new XtermStdio(term), // stdout
-      // new XtermStdio(term), // stderr
+    let fds = [
+        new File([]), // stdin
+        new File([]), // stdout
+        new File([]), // stderr
     ];
     let wasi = new WASI(args, envVars, fds);
     let env = {
       wasi_snapshot_preview1: wasi.wasiImport,
-      env: environment,
+      env: environment
     };
     this.module = await WebAssembly.instantiate(this.moduleData, env);
-    // normally we would call wasi.start here but it doesn't respect when there is
-    // no _start function
-    //@ts-ignore
-    wasi.inst = this.module.instance;
-    if (this.module.instance.exports._start) {
-      //@ts-ignore
-      this.module.instance.exports._start();
-    }
     return this.module;
   }
 
   makeEnv(): any {
     const plugin = this;
-    var env: any = {
+    return {
       extism_alloc(n: bigint): bigint {
         return plugin.allocator.alloc(n);
       },
@@ -191,13 +180,5 @@ export class ExtismPlugin {
         console.error(s);
       },
     };
-
-    for (const [name, func] of Object.entries(this.functions)) {
-      env[name] = function () {
-        return func.apply(plugin, arguments);
-      };
-    }
-
-    return env;
   }
 }

browser/tsconfig.json

@@ -1,13 +1,13 @@
 {
-  "compilerOptions": {
-    "target": "es2016", 
-    "module": "commonjs",  
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true,
-    "declaration": true,
-    "strict": true,                   
-    "skipLibCheck": true,
-    "allowJs": true
-  },
-  "exclude": ["node_modules", "dist", "**/*.test.ts"]
-}
+    "compilerOptions": {
+      "target": "es2016", 
+      "module": "commonjs",  
+      "esModuleInterop": true,
+      "forceConsistentCasingInFileNames": true,
+      "declaration": true,
+      "strict": true,                   
+      "skipLibCheck": true,
+      "allowJs": true
+    },
+    "exclude": ["node_modules", "dist", "**/*.test.ts"]
+  }

c/Makefile

@@ -1,2 +1,2 @@
 build:
-	clang -g -o main main.c -lextism -L .
+	clang -o main main.c -lextism -L .

c/main.c

@@ -9,21 +9,6 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-void hello_world(ExtismCurrentPlugin *plugin, const ExtismVal *inputs,
-                 uint64_t n_inputs, ExtismVal *outputs, uint64_t n_outputs,
-                 void *data) {
-  puts("Hello from C!");
-  puts(data);
-
-  ExtismSize ptr_offs = inputs[0].v.i64;
-
-  uint8_t *buf = extism_current_plugin_memory(plugin) + ptr_offs;
-  uint64_t length = extism_current_plugin_memory_length(plugin, ptr_offs);
-  fwrite(buf, length, 1, stdout);
-  fputc('\n', stdout);
-  outputs[0].v.i64 = inputs[0].v.i64;
-}
-
 uint8_t *read_file(const char *filename, size_t *len) {
 
   FILE *fp = fopen(filename, "rb");
@@ -56,18 +41,13 @@ int main(int argc, char *argv[]) {
   ExtismContext *ctx = extism_context_new();
 
   size_t len = 0;
-  uint8_t *data = read_file("../wasm/code-functions.wasm", &len);
-  ExtismValType inputs[] = {I64};
-  ExtismValType outputs[] = {I64};
-  ExtismFunction *f = extism_function_new("hello_world", inputs, 1, outputs, 1,
-                                          hello_world, "Hello, again!", NULL);
-  ExtismPlugin plugin =
-      extism_plugin_new(ctx, data, len, (const ExtismFunction **)&f, 1, true);
+  uint8_t *data = read_file("../wasm/code.wasm", &len);
+  ExtismPlugin plugin = extism_plugin_new(ctx, data, len, false);
   free(data);
   if (plugin < 0) {
-    puts(extism_error(ctx, -1));
     exit(1);
   }
+
   assert(extism_plugin_call(ctx, plugin, "count_vowels", (uint8_t *)argv[1],
                             strlen(argv[1])) == 0);
   ExtismSize out_len = extism_plugin_output_length(ctx, plugin);
@@ -76,7 +56,6 @@ int main(int argc, char *argv[]) {
   write(STDOUT_FILENO, "\n", 1);
 
   extism_plugin_free(ctx, plugin);
-  extism_function_free(f);
   extism_context_free(ctx);
   return 0;
 }

cpp/Makefile

@@ -1,16 +1,15 @@
 FLAGS=`pkg-config --cflags --libs jsoncpp gtest` -lextism -lpthread
 
 build-example:
-	$(CXX) -std=c++14 -o example -I. example.cpp $(FLAGS)
+	$(CXX) -std=c++11 -o example -I. example.cpp $(FLAGS)
 	
 .PHONY: example
 example: build-example
 	./example
 
 build-test:
-	$(CXX) -std=c++14 -o test/test -I. test/test.cpp $(FLAGS)
+	$(CXX) -std=c++11 -o test/test -I. test/test.cpp $(FLAGS)
 
 .PHONY: test
 test: build-test
 	cd test && ./test
-

cpp/example.cpp

@@ -14,26 +14,10 @@ std::vector<uint8_t> read(const char *filename) {
 }
 
 int main(int argc, char *argv[]) {
-  auto wasm = read("../wasm/code-functions.wasm");
-  std::string tmp = "Testing";
+  auto wasm = read("../wasm/code.wasm");
+  Context context = Context();
 
-  // A lambda can be used as a host function
-  auto hello_world = [&tmp](CurrentPlugin plugin,
-                            const std::vector<Val> &inputs,
-                            std::vector<Val> &outputs, void *user_data) {
-    std::cout << "Hello from C++" << std::endl;
-    std::cout << (const char *)user_data << std::endl;
-    std::cout << tmp << std::endl;
-    outputs[0].v = inputs[0].v;
-  };
-
-  std::vector<Function> functions = {
-      Function("hello_world", {ValType::I64}, {ValType::I64}, hello_world,
-               (void *)"Hello again!",
-               [](void *x) { std::cout << "Free user data" << std::endl; }),
-  };
-
-  Plugin plugin(wasm, true, functions);
+  Plugin plugin = context.plugin(wasm);
 
   const char *input = argc > 1 ? argv[1] : "this is a test";
   ExtismSize length = strlen(input);

cpp/extism.hpp

@@ -1,10 +1,7 @@
 #pragma once
 
-#include <cstring>
-#include <functional>
 #include <map>
 #include <memory>
-#include <stdexcept>
 #include <string>
 #include <vector>
 
@@ -23,62 +20,27 @@ extern "C" {
 namespace extism {
 
 typedef std::map<std::string, std::string> Config;
-
-template <typename T> class ManifestKey {
-  bool is_set = false;
-
-public:
-  T value;
-  ManifestKey(T x, bool is_set = false) : is_set(is_set) { value = x; }
-
-  void set(T x) {
-    value = x;
-    is_set = true;
-  }
-
-  bool empty() const { return is_set == false; }
-};
-
 class Wasm {
-  std::string _path;
-  std::string _url;
-  // TODO: add base64 encoded raw data
-  ManifestKey<std::string> _hash =
-      ManifestKey<std::string>(std::string(), false);
-
 public:
-  // Create Wasm pointing to a path
-  static Wasm path(std::string s, std::string hash = std::string()) {
-    Wasm w;
-    w._path = s;
-    if (!hash.empty()) {
-      w._hash.set(hash);
-    }
-    return w;
-  }
-
-  // Create Wasm pointing to a URL
-  static Wasm url(std::string s, std::string hash = std::string()) {
-    Wasm w;
-    w._url = s;
-    if (!hash.empty()) {
-      w._hash.set(hash);
-    }
-    return w;
-  }
+  std::string path;
+  std::string url;
+  // TODO: add base64 encoded raw data
+  std::string hash;
 
 #ifndef EXTISM_NO_JSON
   Json::Value json() const {
     Json::Value doc;
 
-    if (!this->_path.empty()) {
-      doc["path"] = this->_path;
-    } else if (!this->_url.empty()) {
-      doc["url"] = this->_url;
+    if (!this->path.empty()) {
+      doc["path"] = this->path;
     }
 
-    if (!this->_hash.empty()) {
-      doc["hash"] = this->_hash.value;
+    if (!this->url.empty()) {
+      doc["url"] = this->url;
+    }
+
+    if (!this->hash.empty()) {
+      doc["hash"] = this->hash;
     }
 
     return doc;
@@ -90,23 +52,18 @@ class Manifest {
 public:
   Config config;
   std::vector<Wasm> wasm;
-  ManifestKey<std::vector<std::string>> allowed_hosts;
-  ManifestKey<std::map<std::string, std::string>> allowed_paths;
-  ManifestKey<uint64_t> timeout_ms;
+  std::vector<std::string> allowed_hosts;
+  std::map<std::string, std::string> allowed_paths;
+  uint64_t timeout_ms;
 
-  // Empty manifest
-  Manifest()
-      : timeout_ms(0, false), allowed_hosts(std::vector<std::string>(), false),
-        allowed_paths(std::map<std::string, std::string>(), false) {}
+  Manifest() : timeout_ms(30000) {}
 
-  // Create manifest with a single Wasm from a path
   static Manifest path(std::string s, std::string hash = std::string()) {
     Manifest m;
     m.add_wasm_path(s, hash);
     return m;
   }
 
-  // Create manifest with a single Wasm from a URL
   static Manifest url(std::string s, std::string hash = std::string()) {
     Manifest m;
     m.add_wasm_url(s, hash);
@@ -135,7 +92,7 @@ public:
     if (!this->allowed_hosts.empty()) {
       Json::Value h;
 
-      for (auto s : this->allowed_hosts.value) {
+      for (auto s : this->allowed_hosts) {
         h.append(s);
       }
       doc["allowed_hosts"] = h;
@@ -143,63 +100,54 @@ public:
 
     if (!this->allowed_paths.empty()) {
       Json::Value h;
-      for (auto k : this->allowed_paths.value) {
+      for (auto k : this->allowed_paths) {
         h[k.first] = k.second;
       }
       doc["allowed_paths"] = h;
     }
 
-    if (!this->timeout_ms.empty()) {
-      doc["timeout_ms"] = Json::Value(this->timeout_ms.value);
-    }
+    doc["timeout_ms"] = Json::Value(this->timeout_ms);
 
     Json::FastWriter writer;
     return writer.write(doc);
   }
 #endif
 
-  // Add Wasm from path
   void add_wasm_path(std::string s, std::string hash = std::string()) {
-    Wasm w = Wasm::path(s, hash);
+    Wasm w;
+    w.path = s;
+    w.hash = hash;
     this->wasm.push_back(w);
   }
 
-  // Add Wasm from URL
   void add_wasm_url(std::string u, std::string hash = std::string()) {
-    Wasm w = Wasm::url(u, hash);
+    Wasm w;
+    w.url = u;
+    w.hash = hash;
     this->wasm.push_back(w);
   }
 
-  // Add host to allowed hosts
-  void allow_host(std::string host) {
-    if (this->allowed_hosts.empty()) {
-      this->allowed_hosts.set(std::vector<std::string>{});
-    }
-    this->allowed_hosts.value.push_back(host);
-  }
+  void allow_host(std::string host) { this->allowed_hosts.push_back(host); }
 
-  // Add path to allowed paths
   void allow_path(std::string src, std::string dest = std::string()) {
-    if (this->allowed_paths.empty()) {
-      this->allowed_paths.set(std::map<std::string, std::string>{});
-    }
-
     if (dest.empty()) {
       dest = src;
     }
-    this->allowed_paths.value[src] = dest;
+    this->allowed_paths[src] = dest;
   }
 
-  // Set timeout
   void set_timeout_ms(uint64_t ms) { this->timeout_ms = ms; }
 
-  // Set config key/value
   void set_config(std::string k, std::string v) { this->config[k] = v; }
 };
 
-class Error : public std::runtime_error {
+class Error : public std::exception {
+private:
+  std::string message;
+
 public:
-  Error(std::string msg) : std::runtime_error(msg) {}
+  Error(std::string msg) : message(msg) {}
+  const char *what() { return message.c_str(); }
 };
 
 class Buffer {
@@ -218,141 +166,14 @@ public:
   }
 };
 
-typedef ExtismValType ValType;
-typedef ExtismValUnion ValUnion;
-typedef ExtismVal Val;
-
-class CurrentPlugin {
-  ExtismCurrentPlugin *pointer;
-
-public:
-  CurrentPlugin(ExtismCurrentPlugin *p) : pointer(p) {}
-
-  uint8_t *memory() { return extism_current_plugin_memory(this->pointer); }
-  ExtismSize memory_length(uint64_t offs) {
-    return extism_current_plugin_memory_length(this->pointer, offs);
-  }
-
-  uint64_t alloc(ExtismSize size) {
-    return extism_current_plugin_memory_alloc(this->pointer, size);
-  }
-
-  void free(uint64_t offs) {
-    extism_current_plugin_memory_free(this->pointer, offs);
-  }
-
-  void returnString(Val &output, const std::string &s) {
-    this->returnBytes(output, (const uint8_t *)s.c_str(), s.size());
-  }
-
-  void returnBytes(Val &output, const uint8_t *bytes, size_t len) {
-    auto offs = this->alloc(len);
-    memcpy(this->memory() + offs, bytes, len);
-    output.v.i64 = offs;
-  }
-
-  uint8_t *inputBytes(Val &inp, size_t *length = nullptr) {
-    if (inp.t != ValType::I64) {
-      return nullptr;
-    }
-    if (length != nullptr) {
-      *length = this->memory_length(inp.v.i64);
-    }
-    return this->memory() + inp.v.i64;
-  }
-
-  std::string inputString(Val &inp) {
-    size_t length = 0;
-    char *buf = (char *)this->inputBytes(inp, &length);
-    return std::string(buf, length);
-  }
-};
-
-typedef std::function<void(CurrentPlugin, const std::vector<Val> &,
-                           std::vector<Val> &, void *user_data)>
-    FunctionType;
-
-struct UserData {
-  FunctionType func;
-  void *user_data = NULL;
-  std::function<void(void *)> free_user_data;
-};
-
-static void function_callback(ExtismCurrentPlugin *plugin,
-                              const ExtismVal *inputs, ExtismSize n_inputs,
-                              ExtismVal *outputs, ExtismSize n_outputs,
-                              void *user_data) {
-  UserData *data = (UserData *)user_data;
-  const std::vector<Val> inp(inputs, inputs + n_inputs);
-  std::vector<Val> outp(outputs, outputs + n_outputs);
-  data->func(CurrentPlugin(plugin), inp, outp, data->user_data);
-
-  for (ExtismSize i = 0; i < n_outputs; i++) {
-    outputs[i] = outp[i];
-  }
-}
-
-static void free_user_data(void *user_data) {
-  UserData *data = (UserData *)user_data;
-  if (data->user_data != NULL && data->free_user_data != NULL) {
-    data->free_user_data(data->user_data);
-  }
-}
-
-class Function {
-  std::shared_ptr<ExtismFunction> func;
-  std::string name;
-  UserData user_data;
-
-public:
-  Function(std::string name, const std::vector<ValType> inputs,
-           const std::vector<ValType> outputs, FunctionType f,
-           void *user_data = NULL, std::function<void(void *)> free = nullptr)
-      : name(name) {
-    this->user_data.func = f;
-    this->user_data.user_data = user_data;
-    this->user_data.free_user_data = free;
-    auto ptr = extism_function_new(
-        this->name.c_str(), inputs.data(), inputs.size(), outputs.data(),
-        outputs.size(), function_callback, &this->user_data, free_user_data);
-    this->func = std::shared_ptr<ExtismFunction>(ptr, extism_function_free);
-  }
-
-  void set_namespace(std::string s) {
-    extism_function_set_namespace(this->func.get(), s.c_str());
-  }
-
-  Function(const Function &f) { this->func = f.func; }
-
-  ExtismFunction *get() { return this->func.get(); }
-};
-
-class CancelHandle {
-  const ExtismCancelHandle *handle;
-
-public:
-  CancelHandle(const ExtismCancelHandle *x) : handle(x){};
-  bool cancel() { return extism_plugin_cancel(this->handle); }
-};
-
 class Plugin {
   std::shared_ptr<ExtismContext> context;
   ExtismPlugin plugin;
-  std::vector<Function> functions;
 
 public:
-  // Create a new plugin
-  Plugin(const uint8_t *wasm, ExtismSize length, bool with_wasi = false,
-         std::vector<Function> functions = std::vector<Function>(),
-         std::shared_ptr<ExtismContext> ctx = std::shared_ptr<ExtismContext>(
-             extism_context_new(), extism_context_free))
-      : functions(functions) {
-    std::vector<const ExtismFunction *> ptrs;
-    for (auto i : this->functions) {
-      ptrs.push_back(i.get());
-    }
-    this->plugin = extism_plugin_new(ctx.get(), wasm, length, ptrs.data(),
-                                     ptrs.size(), with_wasi);
+  Plugin(std::shared_ptr<ExtismContext> ctx, const uint8_t *wasm,
+         ExtismSize length, bool with_wasi = false) {
+    this->plugin = extism_plugin_new(ctx.get(), wasm, length, with_wasi);
     if (this->plugin < 0) {
       const char *err = extism_error(ctx.get(), -1);
       throw Error(err == nullptr ? "Unable to load plugin" : err);
@@ -360,39 +181,12 @@ public:
     this->context = ctx;
   }
 
-  Plugin(const std::string &str, bool with_wasi = false,
-         std::vector<Function> functions = {},
-         std::shared_ptr<ExtismContext> ctx = std::shared_ptr<ExtismContext>(
-             extism_context_new(), extism_context_free))
-      : Plugin((const uint8_t *)str.c_str(), str.size(), with_wasi, functions,
-               ctx) {}
-
-  Plugin(const std::vector<uint8_t> &data, bool with_wasi = false,
-         std::vector<Function> functions = {},
-         std::shared_ptr<ExtismContext> ctx = std::shared_ptr<ExtismContext>(
-             extism_context_new(), extism_context_free))
-      : Plugin(data.data(), data.size(), with_wasi, functions, ctx) {}
-
-  CancelHandle cancel_handle() {
-    return CancelHandle(
-        extism_plugin_cancel_handle(this->context.get(), this->id()));
-  }
-
 #ifndef EXTISM_NO_JSON
-  // Create a new plugin from Manifest
-  Plugin(const Manifest &manifest, bool with_wasi = false,
-         std::vector<Function> functions = {},
-         std::shared_ptr<ExtismContext> ctx = std::shared_ptr<ExtismContext>(
-             extism_context_new(), extism_context_free)) {
-    std::vector<const ExtismFunction *> ptrs;
-    for (auto i : this->functions) {
-      ptrs.push_back(i.get());
-    }
-
+  Plugin(std::shared_ptr<ExtismContext> ctx, const Manifest &manifest,
+         bool with_wasi = false) {
     auto buffer = manifest.json();
-    this->plugin =
-        extism_plugin_new(ctx.get(), (const uint8_t *)buffer.c_str(),
-                          buffer.size(), ptrs.data(), ptrs.size(), with_wasi);
+    this->plugin = extism_plugin_new(ctx.get(), (const uint8_t *)buffer.c_str(),
+                                     buffer.size(), with_wasi);
     if (this->plugin < 0) {
       const char *err = extism_error(ctx.get(), -1);
       throw Error(err == nullptr ? "Unable to load plugin from manifest" : err);
@@ -410,15 +204,9 @@ public:
 
   ExtismContext *get_context() const { return this->context.get(); }
 
-  void update(const uint8_t *wasm, size_t length, bool with_wasi = false,
-              std::vector<Function> functions = {}) {
-    this->functions = functions;
-    std::vector<const ExtismFunction *> ptrs;
-    for (auto i : this->functions) {
-      ptrs.push_back(i.get());
-    }
+  void update(const uint8_t *wasm, size_t length, bool with_wasi = false) {
     bool b = extism_plugin_update(this->context.get(), this->plugin, wasm,
-                                  length, ptrs.data(), ptrs.size(), with_wasi);
+                                  length, with_wasi);
     if (!b) {
       const char *err = extism_error(this->context.get(), -1);
       throw Error(err == nullptr ? "Unable to update plugin" : err);
@@ -426,17 +214,11 @@ public:
   }
 
 #ifndef EXTISM_NO_JSON
-  void update(const Manifest &manifest, bool with_wasi = false,
-              std::vector<Function> functions = {}) {
-    this->functions = functions;
-    std::vector<const ExtismFunction *> ptrs;
-    for (auto i : this->functions) {
-      ptrs.push_back(i.get());
-    }
+  void update(const Manifest &manifest, bool with_wasi = false) {
     auto buffer = manifest.json();
-    bool b = extism_plugin_update(
-        this->context.get(), this->plugin, (const uint8_t *)buffer.c_str(),
-        buffer.size(), ptrs.data(), ptrs.size(), with_wasi);
+    bool b = extism_plugin_update(this->context.get(), this->plugin,
+                                  (const uint8_t *)buffer.c_str(),
+                                  buffer.size(), with_wasi);
     if (!b) {
       const char *err = extism_error(this->context.get(), -1);
       throw Error(err == nullptr ? "Unable to update plugin" : err);
@@ -469,7 +251,6 @@ public:
     this->config(json.c_str(), json.size());
   }
 
-  // Call a plugin
   Buffer call(const std::string &func, const uint8_t *input,
               ExtismSize input_length) const {
     int32_t rc = extism_plugin_call(this->context.get(), this->plugin,
@@ -490,19 +271,15 @@ public:
     return Buffer(ptr, length);
   }
 
-  // Call a plugin function with std::vector<uint8_t> input
   Buffer call(const std::string &func,
               const std::vector<uint8_t> &input) const {
     return this->call(func, input.data(), input.size());
   }
 
-  // Call a plugin function with string input
-  Buffer call(const std::string &func,
-              const std::string &input = std::string()) const {
+  Buffer call(const std::string &func, const std::string &input) const {
     return this->call(func, (const uint8_t *)input.c_str(), input.size());
   }
 
-  // Returns true if the specified function exists
   bool function_exists(const std::string &func) const {
     return extism_plugin_function_exists(this->context.get(), this->plugin,
                                          func.c_str());
@@ -513,49 +290,38 @@ class Context {
 public:
   std::shared_ptr<ExtismContext> pointer;
 
-  // Create a new context;
   Context() {
     this->pointer = std::shared_ptr<ExtismContext>(extism_context_new(),
                                                    extism_context_free);
   }
 
-  // Create plugin from uint8_t*
-  Plugin plugin(const uint8_t *wasm, size_t length, bool with_wasi = false,
-                std::vector<Function> functions = {}) const {
-    return Plugin(wasm, length, with_wasi, functions, this->pointer);
+  Plugin plugin(const uint8_t *wasm, size_t length,
+                bool with_wasi = false) const {
+    return Plugin(this->pointer, wasm, length, with_wasi);
   }
 
-  // Create plugin from std::string
-  Plugin plugin(const std::string &str, bool with_wasi = false,
-                std::vector<Function> functions = {}) const {
-    return Plugin((const uint8_t *)str.c_str(), str.size(), with_wasi,
-                  functions, this->pointer);
+  Plugin plugin(const std::string &str, bool with_wasi = false) const {
+    return Plugin(this->pointer, (const uint8_t *)str.c_str(), str.size(),
+                  with_wasi);
   }
 
-  // Create plugin from uint8_t vector
-  Plugin plugin(const std::vector<uint8_t> &data, bool with_wasi = false,
-                std::vector<Function> functions = {}) const {
-    return Plugin(data.data(), data.size(), with_wasi, functions,
-                  this->pointer);
+  Plugin plugin(const std::vector<uint8_t> &data,
+                bool with_wasi = false) const {
+    return Plugin(this->pointer, data.data(), data.size(), with_wasi);
   }
 
 #ifndef EXTISM_NO_JSON
-  // Create plugin from Manifest
-  Plugin plugin(const Manifest &manifest, bool with_wasi = false,
-                std::vector<Function> functions = {}) const {
-    return Plugin(manifest, with_wasi, functions, this->pointer);
+  Plugin plugin(const Manifest &manifest, bool with_wasi = false) const {
+    return Plugin(this->pointer, manifest, with_wasi);
   }
 #endif
 
-  // Remove all plugins
   void reset() { extism_context_reset(this->pointer.get()); }
 };
 
-// Set global log file for plugins
 inline bool set_log_file(const char *filename, const char *level) {
   return extism_log_file(filename, level);
 }
 
-// Get libextism version
 inline std::string version() { return std::string(extism_version()); }
 } // namespace extism

cpp/test/test.cpp

@@ -10,8 +10,6 @@ std::vector<uint8_t> read(const char *filename) {
                               std::istreambuf_iterator<char>());
 }
 
-const std::string code = "../../wasm/code.wasm";
-
 namespace {
 using namespace extism;
 
@@ -21,24 +19,26 @@ TEST(Context, Basic) {
 }
 
 TEST(Plugin, Manifest) {
-  Manifest manifest = Manifest::path(code);
+  Context context;
+  Manifest manifest = Manifest::path("code.wasm");
   manifest.set_config("a", "1");
 
-  ASSERT_NO_THROW(Plugin plugin(manifest));
-  Plugin plugin(manifest);
+  ASSERT_NO_THROW(Plugin plugin = context.plugin(manifest));
+  Plugin plugin = context.plugin(manifest);
 
   Buffer buf = plugin.call("count_vowels", "this is a test");
   ASSERT_EQ((std::string)buf, "{\"count\": 4}");
 }
 
 TEST(Plugin, BadManifest) {
+  Context context;
   Manifest manifest;
-  ASSERT_THROW(Plugin plugin(manifest), Error);
+  ASSERT_THROW(Plugin plugin = context.plugin(manifest), Error);
 }
 
 TEST(Plugin, Bytes) {
   Context context;
-  auto wasm = read(code.c_str());
+  auto wasm = read("code.wasm");
   ASSERT_NO_THROW(Plugin plugin = context.plugin(wasm));
   Plugin plugin = context.plugin(wasm);
 
@@ -48,7 +48,7 @@ TEST(Plugin, Bytes) {
 
 TEST(Plugin, UpdateConfig) {
   Context context;
-  auto wasm = read(code.c_str());
+  auto wasm = read("code.wasm");
   Plugin plugin = context.plugin(wasm);
 
   Config config;
@@ -58,33 +58,13 @@ TEST(Plugin, UpdateConfig) {
 
 TEST(Plugin, FunctionExists) {
   Context context;
-  auto wasm = read(code.c_str());
+  auto wasm = read("code.wasm");
   Plugin plugin = context.plugin(wasm);
 
   ASSERT_FALSE(plugin.function_exists("bad_function"));
   ASSERT_TRUE(plugin.function_exists("count_vowels"));
 }
 
-TEST(Plugin, HostFunction) {
-  auto wasm = read("../../wasm/code-functions.wasm");
-  auto t = std::vector<ValType>{ValType::I64};
-  Function hello_world =
-      Function("hello_world", t, t,
-               [](CurrentPlugin plugin, const std::vector<Val> &params,
-                  std::vector<Val> &results, void *user_data) {
-                 auto offs = plugin.alloc(4);
-                 memcpy(plugin.memory() + offs, "test", 4);
-                 results[0].v.i64 = (int64_t)offs;
-               });
-  auto functions = std::vector<Function>{
-      hello_world,
-  };
-  Plugin plugin(wasm, true, functions);
-  auto buf = plugin.call("count_vowels", "aaa");
-  ASSERT_EQ(buf.length, 4);
-  ASSERT_EQ((std::string)buf, "test");
-}
-
 }; // namespace
 
 int main(int argc, char **argv) {

dotnet/nuget/Extism.runtime.win.csproj

@@ -1,24 +1,24 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
-    <NoBuild>true</NoBuild>
-    <IncludeBuildOutput>false</IncludeBuildOutput>
-  </PropertyGroup>
+    <PropertyGroup>
+        <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
+        <NoBuild>true</NoBuild>
+        <IncludeBuildOutput>false</IncludeBuildOutput>
+    </PropertyGroup>
 
-  <PropertyGroup>
-    <PackageId>Extism.runtime.win-x64</PackageId>
-    <Version>0.7.0</Version>
-    <Authors>Extism Contributors</Authors>
-    <Description>Internal implementation package for Extism to work on Windows x64</Description>
-    <Tags>extism, wasm, plugin</Tags>
-    <PackageLicenseExpression>BSD-3-Clause</PackageLicenseExpression>
-  </PropertyGroup>
+    <PropertyGroup>
+        <PackageId>Extism.runtime.win-x64</PackageId>
+        <Version>0.2.0</Version>
+        <Authors>Extism Contributors</Authors>
+        <Description>Internal implementation package for Extism to work on Windows x64</Description>
+        <Tags>extism, wasm, plugin</Tags>
+        <PackageLicenseExpression>BSD-3-Clause</PackageLicenseExpression>
+    </PropertyGroup>
 
-  <ItemGroup>
-    <Content Include="runtimes/win-x64.dll"
-      CopyToOutputDirectory="Always"
-      Pack="true"
-      PackagePath="runtimes\win-x64\native\extism.dll" />
-  </ItemGroup>
+    <ItemGroup>
+        <Content Include="runtimes/win-x64.dll"
+            CopyToOutputDirectory="Always"
+            Pack="true"
+            PackagePath="runtimes\win-x64\native\extism.dll" />
+    </ItemGroup>
 </Project>

dotnet/samples/Extism.Sdk.Sample/Extism.Sdk.Sample.csproj

@@ -1,29 +1,21 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-	<PropertyGroup>
-		<OutputType>Exe</OutputType>
-		<TargetFramework>net7.0</TargetFramework>
-		<ImplicitUsings>enable</ImplicitUsings>
-		<Nullable>enable</Nullable>
-		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-	</PropertyGroup>
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
 
-	<ItemGroup>
-		<None Include="..\..\..\wasm\code.wasm" Link="code.wasm">
-			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-		</None>
-		<None Include="..\..\..\wasm\code-functions.wasm" Link="code-functions.wasm">
-			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-		</None>
-	</ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\..\wasm\code.wasm" Link="code.wasm">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
 
-	<ItemGroup>
-		<PackageReference Include="Extism.runtime.win-x64" Version="0.4.0" />
-	</ItemGroup>
-
-	<ItemGroup>
-		<ProjectReference Include="..\..\src\Extism.Sdk\Extism.Sdk.csproj" />
-	</ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Extism.Sdk\Extism.Sdk.csproj" />
+  </ItemGroup>
 
 
-</Project>
+</Project>

dotnet/samples/Extism.Sdk.Sample/Program.cs

@@ -1,40 +1,11 @@
-using Extism.Sdk;
 using Extism.Sdk.Native;
-
-using System.Runtime.InteropServices;
 using System.Text;
 
 var context = new Context();
-
-var userData = Marshal.StringToHGlobalAnsi("Hello again!");
-
-using var helloWorld = new HostFunction(
-    "hello_world",
-    "env",
-    new[] { ExtismValType.I64 },
-    new[] { ExtismValType.I64 },
-    userData,
-    HelloWorld);
-
-void HelloWorld(CurrentPlugin plugin, Span<ExtismVal> inputs, Span<ExtismVal> outputs, nint data)
-{
-    Console.WriteLine("Hello from .NET!");
-
-    var text = Marshal.PtrToStringAnsi(data);
-    Console.WriteLine(text);
-
-    var input = plugin.ReadString(new nint(inputs[0].v.i64));
-    Console.WriteLine($"Input: {input}");
-
-    outputs[0].v.i64 = plugin.WriteString(input);
-}
-
-var wasm = File.ReadAllBytes("./code-functions.wasm");
-using var plugin = context.CreatePlugin(wasm, new[] { helloWorld }, withWasi: true);
+var wasm = await File.ReadAllBytesAsync("./code.wasm");
+using var plugin = context.CreatePlugin(wasm, withWasi: true);
 
 var output = Encoding.UTF8.GetString(
     plugin.CallFunction("count_vowels", Encoding.UTF8.GetBytes("Hello World!"))
 );
-
-Console.WriteLine($"Output: {output}");
-
+Console.WriteLine(output); // prints {"count": 3}

dotnet/src/Extism.Sdk/Context.cs

@@ -1,4 +1,3 @@
-using System.Collections.Concurrent;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 
@@ -7,10 +6,8 @@ namespace Extism.Sdk.Native;
 /// <summary>
 /// Represents an Extism context through which you can load <see cref="Plugin"/>s.
 /// </summary>
-public unsafe class Context : IDisposable
+public class Context : IDisposable
 {
-    private readonly ConcurrentDictionary<int, Plugin> _plugins = new ConcurrentDictionary<int, Plugin>();
-
     private const int DisposedMarker = 1;
 
     private int _disposed;
@@ -20,63 +17,33 @@ public unsafe class Context : IDisposable
     /// </summary>
     public Context()
     {
-        unsafe
-        {
-            NativeHandle = LibExtism.extism_context_new();
-        }
+        NativeHandle = LibExtism.extism_context_new();
     }
 
     /// <summary>
     /// Native pointer to the Extism Context.
     /// </summary>
-    internal LibExtism.ExtismContext* NativeHandle { get; }
+    internal IntPtr NativeHandle { get; }
 
     /// <summary>
     /// Loads an Extism <see cref="Plugin"/>.
     /// </summary>
     /// <param name="wasm">A WASM module (wat or wasm) or a JSON encoded manifest.</param>
-    /// <param name="functions">List of host functions expected by the plugin.</param>
     /// <param name="withWasi">Enable/Disable WASI.</param>
-    public Plugin CreatePlugin(ReadOnlySpan<byte> wasm, HostFunction[] functions, bool withWasi)
+    public Plugin CreatePlugin(ReadOnlySpan<byte> wasm, bool withWasi)
     {
         CheckNotDisposed();
 
-        var functionHandles = functions.Select(f => f.NativeHandle).ToArray();
-
         unsafe
         {
             fixed (byte* wasmPtr = wasm)
-            fixed (IntPtr* functionsPtr = functionHandles)
             {
-                var index = LibExtism.extism_plugin_new(NativeHandle, wasmPtr, wasm.Length, functionsPtr, functions.Length, withWasi);
-                if (index == -1)
-                {
-                    var errorMsg = GetError();
-                    if (errorMsg != null)
-                    {
-                        throw new ExtismException(errorMsg);
-                    }
-                    else
-                    {
-                        throw new ExtismException("Failed to create plugin.");
-                    }
-                }
-
-                return _plugins[index] = new Plugin(this, functions, index);
+                var plugin = LibExtism.extism_plugin_new(NativeHandle, wasmPtr, wasm.Length, withWasi);
+                return new Plugin(this, plugin);
             }
         }
     }
 
-    /// <summary>
-    /// Get a plugin by index.
-    /// </summary>
-    /// <param name="index">Index of plugin.</param>
-    /// <returns></returns>
-    public Plugin GetPlugin(int index)
-    {
-        return _plugins[index];
-    }
-
     /// <summary>
     /// Remove all plugins from this <see cref="Context"/>'s registry.
     /// </summary>
@@ -143,11 +110,6 @@ public unsafe class Context : IDisposable
             // Free up any managed resources here
         }
 
-        foreach (var plugin in _plugins.Values)
-        {
-            plugin.Dispose();
-        }
-
         // Free up unmanaged resources
         LibExtism.extism_context_free(NativeHandle);
     }
@@ -189,3 +151,34 @@ public unsafe class Context : IDisposable
         return LibExtism.extism_log_file(logPath, logLevel);
     }
 }
+
+/// <summary>
+/// Extism Log Levels
+/// </summary>
+public enum LogLevel
+{
+    /// <summary>
+    /// Designates very serious errors.
+    /// </summary>
+    Error,
+
+    /// <summary>
+    /// Designates hazardous situations.
+    /// </summary>
+    Warning,
+
+    /// <summary>
+    /// Designates useful information.
+    /// </summary>
+    Info,
+
+    /// <summary>
+    /// Designates lower priority information.
+    /// </summary>
+    Debug,
+
+    /// <summary>
+    /// Designates very low priority, often extremely verbose, information.
+    /// </summary>
+    Trace
+}

dotnet/src/Extism.Sdk/CurrentPlugin.cs

@@ -1,138 +0,0 @@
-using Extism.Sdk.Native;
-
-using System.Text;
-
-namespace Extism.Sdk
-{
-    /// <summary>
-    /// Represents the current plugin. Can only be used within <see cref="HostFunction"/>s.
-    /// </summary>
-    public class CurrentPlugin
-    {
-        internal CurrentPlugin(nint nativeHandle)
-        {
-            NativeHandle = nativeHandle;
-        }
-
-        internal nint NativeHandle { get; }
-
-        /// <summary>
-        /// Returns a pointer to the memory of the currently running plugin.
-        /// NOTE: this should only be called from host functions.
-        /// </summary>
-        /// <returns></returns>
-        public nint GetMemory()
-        {
-            return LibExtism.extism_current_plugin_memory(NativeHandle);
-        }
-
-        /// <summary>
-        /// Reads a string from a memory block using UTF8.
-        /// </summary>
-        /// <param name="pointer"></param>
-        /// <returns></returns>
-        public string ReadString(nint pointer)
-        {
-            return ReadString(pointer, Encoding.UTF8);
-        }
-
-        /// <summary>
-        /// Reads a string form a memory block.
-        /// </summary>
-        /// <param name="pointer"></param>
-        /// <param name="encoding"></param>
-        /// <returns></returns>
-        public string ReadString(nint pointer, Encoding encoding)
-        {
-            var buffer = ReadBytes(pointer);
-
-            return encoding.GetString(buffer);
-        }
-
-        /// <summary>
-        /// Returns a span of bytes for a given block.
-        /// </summary>
-        /// <param name="pointer"></param>
-        /// <returns></returns>
-        public unsafe Span<byte> ReadBytes(nint pointer)
-        {
-            var mem = GetMemory();
-            var length = (int)BlockLength(pointer);
-            var ptr = (byte*)mem + pointer;
-
-            return new Span<byte>(ptr, length);
-        }
-
-        /// <summary>
-        /// Writes a string into the current plugin memory using UTF-8 encoding and returns the pointer of the block.
-        /// </summary>
-        /// <param name="value"></param>
-        public nint WriteString(string value)
-            => WriteString(value, Encoding.UTF8);
-
-        /// <summary>
-        /// Writes a string into the current plugin memory and returns the pointer of the block.
-        /// </summary>
-        /// <param name="value"></param>
-        /// <param name="encoding"></param>
-        public nint WriteString(string value, Encoding encoding)
-        {
-            var bytes = encoding.GetBytes(value);
-            var pointer = AllocateBlock(bytes.Length);
-            WriteBytes(pointer, bytes);
-
-            return pointer;
-        }
-
-        /// <summary>
-        /// Writes a byte array into a block of memory.
-        /// </summary>
-        /// <param name="pointer"></param>
-        /// <param name="bytes"></param>
-        public unsafe void WriteBytes(nint pointer, Span<byte> bytes)
-        {
-            var length = BlockLength(pointer);
-            if (length < bytes.Length)
-            {
-                throw new InvalidOperationException("Destination block length is less than source block length.");
-            }
-
-            var mem = GetMemory();
-            var ptr = (void*)(mem + pointer);
-            var destination = new Span<byte>(ptr, bytes.Length);
-
-            bytes.CopyTo(destination);
-        }
-
-        /// <summary>
-        /// Frees a block of memory belonging to the current plugin.
-        /// </summary>
-        /// <param name="pointer"></param>
-        public void FreeBlock(nint pointer)
-        {
-            LibExtism.extism_current_plugin_memory_free(NativeHandle, pointer);
-        }
-
-        /// <summary>
-        /// Allocate a memory block in the currently running plugin.
-        /// 
-        /// </summary>
-        /// <param name="length"></param>
-        /// <returns></returns>
-        public nint AllocateBlock(long length)
-        {
-            return LibExtism.extism_current_plugin_memory_alloc(NativeHandle, length);
-        }
-
-        /// <summary>
-        /// Get the length of an allocated block.
-        /// NOTE: this should only be called from host functions.
-        /// </summary>
-        /// <param name="pointer"></param>
-        /// <returns></returns>
-        public long BlockLength(nint pointer)
-        {
-            return LibExtism.extism_current_plugin_memory_length(NativeHandle, pointer);
-        }
-    }
-}

dotnet/src/Extism.Sdk/Exception.cs

@@ -28,7 +28,7 @@ public class ExtismException : Exception
     /// with a specified error message and a reference to the inner exception
     /// that is the cause of this exception.
     /// </summary>
-    /// <param name="message">The message that describes the error.</param>
+    /// <param name="message">The message that describes the error .</param>
     /// <param name="innerException">
     ///  The exception that is the cause of the current exception, or a null reference
     ///  (Nothing in Visual Basic) if no inner exception is specified.

dotnet/src/Extism.Sdk/Extism.Sdk.csproj

@@ -10,7 +10,7 @@
 
 	<PropertyGroup>
 		<PackageId>Extism.Sdk</PackageId>
-		<Version>0.6.0</Version>
+		<Version>0.2.0</Version>
 		<Authors>Extism Contributors</Authors>
 		<Description>Extism SDK that allows hosting Extism plugins in .NET apps.</Description>
 		<Tags>extism, wasm, plugin</Tags>

dotnet/src/Extism.Sdk/HostFunction.cs

@@ -1,146 +0,0 @@
-using Extism.Sdk.Native;
-
-using System.Diagnostics.CodeAnalysis;
-
-namespace Extism.Sdk
-{
-    /// <summary>
-    /// A host function signature.
-    /// </summary>
-    /// <param name="plugin">Plugin Index</param>
-    /// <param name="inputs">Input parameters</param>
-    /// <param name="outputs">Output parameters, the host function can change this.</param>
-    /// <param name="userData">A data passed in during Host Function creation.</param>
-    public delegate void ExtismFunction(CurrentPlugin plugin, Span<ExtismVal> inputs, Span<ExtismVal> outputs, IntPtr userData);
-
-    /// <summary>
-    /// A function provided by the host that plugins can call.
-    /// </summary>
-    public class HostFunction : IDisposable
-    {
-        private const int DisposedMarker = 1;
-        private int _disposed;
-
-        /// <summary>
-        /// Registers a Host Function.
-        /// </summary>
-        /// <param name="functionName">The literal name of the function, how it would be called from a <see cref="Plugin"/>.</param>
-        /// <param name="inputTypes">The types of the input arguments/parameters the <see cref="Plugin"/> caller will provide.</param>
-        /// <param name="outputTypes">The types of the output returned from the host function to the <see cref="Plugin"/>.</param>
-        /// <param name="userData">An opaque pointer to an object from the host, accessible to the <see cref="Plugin"/>.
-        /// NOTE: it is the shared responsibility of the host and <see cref="Plugin"/> to cast/dereference this value properly.</param>
-        /// <param name="hostFunction"></param>
-        public HostFunction(
-            string functionName,
-            Span<ExtismValType> inputTypes,
-            Span<ExtismValType> outputTypes,
-            IntPtr userData,
-            ExtismFunction hostFunction) :
-            this(functionName, "", inputTypes, outputTypes, userData, hostFunction)
-        {
-
-        }
-
-        /// <summary>
-        /// Registers a Host Function.
-        /// </summary>
-        /// <param name="functionName">The literal name of the function, how it would be called from a <see cref="Plugin"/>.</param>
-        /// <param name="namespace">Function namespace.</param>
-        /// <param name="inputTypes">The types of the input arguments/parameters the <see cref="Plugin"/> caller will provide.</param>
-        /// <param name="outputTypes">The types of the output returned from the host function to the <see cref="Plugin"/>.</param>
-        /// <param name="userData">An opaque pointer to an object from the host, accessible to the <see cref="Plugin"/>.
-        /// NOTE: it is the shared responsibility of the host and <see cref="Plugin"/> to cast/dereference this value properly.</param>
-        /// <param name="hostFunction"></param>
-        unsafe public HostFunction(
-            string functionName,
-            string @namespace,
-            Span<ExtismValType> inputTypes,
-            Span<ExtismValType> outputTypes,
-            IntPtr userData,
-            ExtismFunction hostFunction)
-        {
-            fixed (ExtismValType* inputs = inputTypes)
-            fixed (ExtismValType* outputs = outputTypes)
-            {
-                NativeHandle = LibExtism.extism_function_new(functionName, inputs, inputTypes.Length, outputs, outputTypes.Length, CallbackImpl, userData, IntPtr.Zero);
-            }
-
-            if (!string.IsNullOrEmpty(@namespace))
-            {
-                LibExtism.extism_function_set_namespace(NativeHandle, @namespace);
-            }
-
-            void CallbackImpl(
-                nint plugin,
-                ExtismVal* inputsPtr,
-                uint n_inputs,
-                ExtismVal* outputsPtr,
-                uint n_outputs,
-                IntPtr data)
-            {
-                var outputs = new Span<ExtismVal>(outputsPtr, (int)n_outputs);
-                var inputs = new Span<ExtismVal>(inputsPtr, (int)n_inputs);
-
-                hostFunction(new CurrentPlugin(plugin), inputs, outputs, data);
-            }
-        }
-
-        internal IntPtr NativeHandle { get; }
-
-        /// <summary>
-        /// Frees all resources held by this Host Function.
-        /// </summary>
-        public void Dispose()
-        {
-            if (Interlocked.Exchange(ref _disposed, DisposedMarker) == DisposedMarker)
-            {
-                // Already disposed.
-                return;
-            }
-
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        /// <summary>
-        /// Throw an appropriate exception if the Host Function has been disposed.
-        /// </summary>
-        /// <exception cref="ObjectDisposedException"></exception>
-        protected void CheckNotDisposed()
-        {
-            Interlocked.MemoryBarrier();
-            if (_disposed == DisposedMarker)
-            {
-                ThrowDisposedException();
-            }
-        }
-
-        [DoesNotReturn]
-        private static void ThrowDisposedException()
-        {
-            throw new ObjectDisposedException(nameof(HostFunction));
-        }
-
-        /// <summary>
-        /// Frees all resources held by this Host Function.
-        /// </summary>
-        unsafe protected virtual void Dispose(bool disposing)
-        {
-            if (disposing)
-            {
-                // Free up any managed resources here
-            }
-
-            // Free up unmanaged resources
-            LibExtism.extism_function_free(NativeHandle);
-        }
-
-        /// <summary>
-        /// Destructs the current Host Function and frees all resources used by it.
-        /// </summary>
-        ~HostFunction()
-        {
-            Dispose(false);
-        }
-    }
-}

dotnet/src/Extism.Sdk/LibExtism.cs

@@ -2,197 +2,24 @@ using System.Runtime.InteropServices;
 
 namespace Extism.Sdk.Native;
 
-/// <summary>
-/// A union type for host function argument/return values.
-/// </summary>
-[StructLayout(LayoutKind.Explicit)]
-public struct ExtismValUnion
-{
-    /// <summary>
-    /// Set this for 32 bit integers
-    /// </summary>
-    [FieldOffset(0)]
-    public int i32;
-
-    /// <summary>
-    /// Set this for 64 bit integers
-    /// </summary>
-    [FieldOffset(0)]
-    public long i64;
-
-    /// <summary>
-    /// Set this for 32 bit floats
-    /// </summary>
-    [FieldOffset(0)]
-    public float f32;
-
-    /// <summary>
-    /// Set this for 64 bit floats
-    /// </summary>
-    [FieldOffset(0)]
-    public double f64;
-}
-
-/// <summary>
-/// Represents Wasm data types that Extism can understand
-/// </summary>
-public enum ExtismValType : byte
-{
-    /// <summary>
-    /// Signed 32 bit integer. Equivalent of <see cref="int"/> or <see cref="uint"/>
-    /// </summary>
-    I32,
-
-    /// <summary>
-    /// Signed 64 bit integer. Equivalent of <see cref="long"/> or <see cref="ulong"/>
-    /// </summary>
-    I64,
-
-    /// <summary>
-    /// Floating point 32 bit integer. Equivalent of <see cref="float"/>
-    /// </summary>
-    F32,
-
-    /// <summary>
-    /// Floating point 64 bit integer. Equivalent of <see cref="double"/>
-    /// </summary>
-    F64,
-
-    /// <summary>
-    /// A 128 bit number.
-    /// </summary>
-    V128,
-
-    /// <summary>
-    /// A reference to opaque data in the Wasm instance.
-    /// </summary>
-    FuncRef,
-
-    /// <summary>
-    /// A reference to opaque data in the Wasm instance.
-    /// </summary>
-    ExternRef
-}
-
-/// <summary>
-/// `ExtismVal` holds the type and value of a function argument/return
-/// </summary>
-[StructLayout(LayoutKind.Sequential)]
-public struct ExtismVal
-{
-    /// <summary>
-    /// The type for the argument
-    /// </summary>
-    public ExtismValType t;
-
-    /// <summary>
-    /// The value for the argument
-    /// </summary>
-    public ExtismValUnion v;
-}
-
 /// <summary>
 /// Functions exposed by the native Extism library.
 /// </summary>
 internal static class LibExtism
 {
-    /// <summary>
-    /// A `Context` is used to store and manage plugins.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential)]
-    internal struct ExtismContext { }
-
-    /// <summary>
-    /// Host function signature
-    /// </summary>
-    /// <param name="plugin"></param>
-    /// <param name="inputs"></param>
-    /// <param name="n_inputs"></param>
-    /// <param name="outputs"></param>
-    /// <param name="n_outputs"></param>
-    /// <param name="data"></param>
-    unsafe internal delegate void InternalExtismFunction(nint plugin, ExtismVal* inputs, uint n_inputs, ExtismVal* outputs, uint n_outputs, IntPtr data);
-
-    /// <summary>
-    /// Returns a pointer to the memory of the currently running plugin.
-    /// NOTE: this should only be called from host functions.
-    /// </summary>
-    /// <param name="plugin"></param>
-    /// <returns></returns>
-    [DllImport("extism", EntryPoint = "extism_current_plugin_memory")]
-    internal static extern IntPtr extism_current_plugin_memory(nint plugin);
-
-    /// <summary>
-    /// Allocate a memory block in the currently running plugin
-    /// </summary>
-    /// <param name="plugin"></param>
-    /// <param name="n"></param>
-    /// <returns></returns>
-    [DllImport("extism", EntryPoint = "extism_current_plugin_memory_alloc")]
-    internal static extern IntPtr extism_current_plugin_memory_alloc(nint plugin, long n);
-
-    /// <summary>
-    /// Get the length of an allocated block.
-    /// NOTE: this should only be called from host functions.
-    /// </summary>
-    /// <param name="plugin"></param>
-    /// <param name="n"></param>
-    /// <returns></returns>
-    [DllImport("extism", EntryPoint = "extism_current_plugin_memory_length")]
-    internal static extern long extism_current_plugin_memory_length(nint plugin, long n);
-
-    /// <summary>
-    /// Get the length of an allocated block.
-    /// NOTE: this should only be called from host functions.
-    /// </summary>
-    /// <param name="plugin"></param>
-    /// <param name="ptr"></param>
-    [DllImport("extism", EntryPoint = "extism_current_plugin_memory_free")]
-    internal static extern void extism_current_plugin_memory_free(nint plugin, IntPtr ptr);
-
-    /// <summary>
-    /// Create a new host function.
-    /// </summary>
-    /// <param name="name">function name, this should be valid UTF-8</param>
-    /// <param name="inputs">argument types</param>
-    /// <param name="nInputs">number of argument types</param>
-    /// <param name="outputs">return types</param>
-    /// <param name="nOutputs">number of return types</param>
-    /// <param name="func">the function to call</param>
-    /// <param name="userData">a pointer that will be passed to the function when it's called this value should live as long as the function exists</param>
-    /// <param name="freeUserData">a callback to release the `user_data` value when the resulting `ExtismFunction` is freed.</param>
-    /// <returns></returns>
-    [DllImport("extism", EntryPoint = "extism_function_new")]
-    unsafe internal static extern IntPtr extism_function_new(string name, ExtismValType* inputs, long nInputs, ExtismValType* outputs, long nOutputs, InternalExtismFunction func, IntPtr userData, IntPtr freeUserData);
-
-    /// <summary>
-    /// Set the namespace of an <see cref="ExtismFunction"/>
-    /// </summary>
-    /// <param name="ptr"></param>
-    /// <param name="namespace"></param>
-    [DllImport("extism", EntryPoint = "extism_function_set_namespace")]
-    internal static extern void extism_function_set_namespace(IntPtr ptr, string @namespace);
-
-    /// <summary>
-    /// Free an <see cref="ExtismFunction"/>
-    /// </summary>
-    /// <param name="ptr"></param>
-    [DllImport("extism", EntryPoint = "extism_function_free")]
-    internal static extern void extism_function_free(IntPtr ptr);
-
     /// <summary>
     /// Create a new context.
     /// </summary>
     /// <returns>A pointer to the newly created context.</returns>
     [DllImport("extism")]
-    unsafe internal static extern ExtismContext* extism_context_new();
+    public static extern IntPtr extism_context_new();
 
     /// <summary>
     /// Remove a context from the registry and free associated memory.
     /// </summary>
     /// <param name="context"></param>
     [DllImport("extism")]
-    unsafe internal static extern void extism_context_free(ExtismContext* context);
+    public static extern void extism_context_free(IntPtr context);
 
     /// <summary>
     /// Load a WASM plugin.
@@ -200,12 +27,10 @@ internal static class LibExtism
     /// <param name="context">Pointer to the context the plugin will be associated with.</param>
     /// <param name="wasm">A WASM module (wat or wasm) or a JSON encoded manifest.</param>
     /// <param name="wasmSize">The length of the `wasm` parameter.</param>
-    /// <param name="functions">Array of host function pointers.</param>
-    /// <param name="nFunctions">Number of host functions.</param>
     /// <param name="withWasi">Enables/disables WASI.</param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern int extism_plugin_new(ExtismContext* context, byte* wasm, int wasmSize, IntPtr* functions, int nFunctions, bool withWasi);
+    unsafe public static extern IntPtr extism_plugin_new(IntPtr context, byte* wasm, int wasmSize, bool withWasi);
 
     /// <summary>
     /// Update a plugin, keeping the existing ID.
@@ -215,13 +40,11 @@ internal static class LibExtism
     /// <param name="context">Pointer to the context the plugin is associated with.</param>
     /// <param name="plugin">Pointer to the plugin you want to update.</param>
     /// <param name="wasm">A WASM module (wat or wasm) or a JSON encoded manifest.</param>
-    /// <param name="wasmSize">The length of the `wasm` parameter.</param>
-    /// <param name="functions">Array of host function pointers.</param>
-    /// <param name="nFunctions">Number of host functions.</param>
+    /// <param name="wasmLength">The length of the `wasm` parameter.</param>
     /// <param name="withWasi">Enables/disables WASI.</param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern bool extism_plugin_update(ExtismContext* context, int plugin, byte* wasm, long wasmSize, Span<IntPtr> functions, long nFunctions, bool withWasi);
+    unsafe public static extern bool extism_plugin_update(IntPtr context, IntPtr plugin, byte* wasm, int wasmLength, bool withWasi);
 
     /// <summary>
     /// Remove a plugin from the registry and free associated memory.
@@ -229,14 +52,14 @@ internal static class LibExtism
     /// <param name="context">Pointer to the context the plugin is associated with.</param>
     /// <param name="plugin">Pointer to the plugin you want to free.</param>
     [DllImport("extism")]
-    unsafe internal static extern void extism_plugin_free(ExtismContext* context, int plugin);
+    public static extern void extism_plugin_free(IntPtr context, IntPtr plugin);
 
     /// <summary>
     /// Remove all plugins from the registry.
     /// </summary>
     /// <param name="context"></param>
     [DllImport("extism")]
-    unsafe internal static extern void extism_context_reset(ExtismContext* context);
+    public static extern void extism_context_reset(IntPtr context);
 
     /// <summary>
     /// Update plugin config values, this will merge with the existing values.
@@ -247,7 +70,7 @@ internal static class LibExtism
     /// <param name="jsonLength">The length of the `json` parameter.</param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern bool extism_plugin_config(ExtismContext* context, int plugin, byte* json, int jsonLength);
+    unsafe public static extern bool extism_plugin_config(IntPtr context, IntPtr plugin, byte* json, int jsonLength);
 
     /// <summary>
     /// Returns true if funcName exists.
@@ -257,7 +80,7 @@ internal static class LibExtism
     /// <param name="funcName"></param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern bool extism_plugin_function_exists(ExtismContext* context, int plugin, string funcName);
+    public static extern bool extism_plugin_function_exists(IntPtr context, IntPtr plugin, string funcName);
 
     /// <summary>
     /// Call a function.
@@ -269,7 +92,7 @@ internal static class LibExtism
     /// <param name="dataLen">The length of the `data` parameter.</param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern int extism_plugin_call(ExtismContext* context, int plugin, string funcName, byte* data, int dataLen);
+    unsafe public static extern int extism_plugin_call(IntPtr context, IntPtr plugin, string funcName, byte* data, int dataLen);
 
     /// <summary>
     /// Get the error associated with a Context or Plugin, if plugin is -1 then the context error will be returned.
@@ -278,7 +101,7 @@ internal static class LibExtism
     /// <param name="plugin">A plugin pointer, or -1 for the context error.</param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern IntPtr extism_error(ExtismContext* context, nint plugin);
+    public static extern IntPtr extism_error(IntPtr context, nint plugin);
 
     /// <summary>
     /// Get the length of a plugin's output data.
@@ -287,7 +110,7 @@ internal static class LibExtism
     /// <param name="plugin"></param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern long extism_plugin_output_length(ExtismContext* context, int plugin);
+    public static extern long extism_plugin_output_length(IntPtr context, IntPtr plugin);
 
     /// <summary>
     /// Get the plugin's output data.
@@ -296,7 +119,7 @@ internal static class LibExtism
     /// <param name="plugin"></param>
     /// <returns></returns>
     [DllImport("extism")]
-    unsafe internal static extern IntPtr extism_plugin_output_data(ExtismContext* context, int plugin);
+    public static extern IntPtr extism_plugin_output_data(IntPtr context, IntPtr plugin);
 
     /// <summary>
     /// Set log file and level.
@@ -305,43 +128,43 @@ internal static class LibExtism
     /// <param name="logLevel"></param>
     /// <returns></returns>
     [DllImport("extism")]
-    internal static extern bool extism_log_file(string filename, string logLevel);
+    public static extern bool extism_log_file(string filename, string logLevel);
 
     /// <summary>
     /// Get the Extism version string.
     /// </summary>
     /// <returns></returns>
     [DllImport("extism", EntryPoint = "extism_version")]
-    internal static extern IntPtr extism_version();
+    public static extern IntPtr extism_version();
 
     /// <summary>
     /// Extism Log Levels
     /// </summary>
-    internal static class LogLevels
+    public static class LogLevels
     {
         /// <summary>
         /// Designates very serious errors.
         /// </summary>
-        internal const string Error = "Error";
+        public const string Error = "Error";
 
         /// <summary>
         /// Designates hazardous situations.
         /// </summary>
-        internal const string Warn = "Warn";
+        public const string Warn = "Warn";
 
         /// <summary>
         /// Designates useful information.
         /// </summary>
-        internal const string Info = "Info";
+        public const string Info = "Info";
 
         /// <summary>
         /// Designates lower priority information.
         /// </summary>
-        internal const string Debug = "Debug";
+        public const string Debug = "Debug";
 
         /// <summary>
         /// Designates very low priority, often extremely verbose, information.
         /// </summary>
-        internal const string Trace = "Trace";
+        public const string Trace = "Trace";
     }
-}
+}

dotnet/src/Extism.Sdk/LogLevel.cs

@@ -1,32 +0,0 @@
-namespace Extism.Sdk.Native;
-
-/// <summary>
-/// Extism Log Levels
-/// </summary>
-public enum LogLevel
-{
-    /// <summary>
-    /// Designates very serious errors.
-    /// </summary>
-    Error,
-
-    /// <summary>
-    /// Designates hazardous situations.
-    /// </summary>
-    Warning,
-
-    /// <summary>
-    /// Designates useful information.
-    /// </summary>
-    Info,
-
-    /// <summary>
-    /// Designates lower priority information.
-    /// </summary>
-    Debug,
-
-    /// <summary>
-    /// Designates very low priority, often extremely verbose, information.
-    /// </summary>
-    Trace
-}

dotnet/src/Extism.Sdk/Plugin.cs

@@ -11,32 +11,18 @@ public class Plugin : IDisposable
     private const int DisposedMarker = 1;
 
     private readonly Context _context;
-    private readonly HostFunction[] _functions;
     private int _disposed;
 
-    /// <summary>
-    /// Create a and load a plug-in
-    /// Using this constructor will give the plug-in it's own internal Context
-    /// </summary>
-    /// <param name="wasm">A WASM module (wat or wasm) or a JSON encoded manifest.</param>
-    /// <param name="functions">List of host functions expected by the plugin.</param>
-    /// <param name="withWasi">Enable/Disable WASI.</param>
-    public static Plugin Create(ReadOnlySpan<byte> wasm, HostFunction[] functions, bool withWasi) {
-        var context = new Context();
-        return context.CreatePlugin(wasm, functions, withWasi);
-    }
-
-    internal Plugin(Context context, HostFunction[] functions, int index)
+    internal Plugin(Context context, IntPtr handle)
     {
         _context = context;
-        _functions = functions;
-        Index = index;
+        NativeHandle = handle;
     }
 
     /// <summary>
     /// A pointer to the native Plugin struct.
     /// </summary>
-    internal int Index { get; }
+    internal IntPtr NativeHandle { get; }
 
     /// <summary>
     /// Update a plugin, keeping the existing ID.
@@ -47,10 +33,9 @@ public class Plugin : IDisposable
     {
         CheckNotDisposed();
 
-        var functions = _functions.Select(f => f.NativeHandle).ToArray();
         fixed (byte* wasmPtr = wasm)
         {
-            return LibExtism.extism_plugin_update(_context.NativeHandle, Index, wasmPtr, wasm.Length, functions, 0, withWasi);
+            return LibExtism.extism_plugin_update(_context.NativeHandle, NativeHandle, wasmPtr, wasm.Length, withWasi);
         }
     }
 
@@ -64,18 +49,18 @@ public class Plugin : IDisposable
 
         fixed (byte* jsonPtr = json)
         {
-            return LibExtism.extism_plugin_config(_context.NativeHandle, Index, jsonPtr, json.Length);
+            return LibExtism.extism_plugin_config(_context.NativeHandle, NativeHandle, jsonPtr, json.Length);
         }
     }
 
     /// <summary>
     /// Checks if a specific function exists in the current plugin.
     /// </summary>
-    unsafe public bool FunctionExists(string name)
+    public bool FunctionExists(string name)
     {
         CheckNotDisposed();
 
-        return LibExtism.extism_plugin_function_exists(_context.NativeHandle, Index, name);
+        return LibExtism.extism_plugin_function_exists(_context.NativeHandle, NativeHandle, name);
     }
 
     /// <summary>
@@ -93,20 +78,14 @@ public class Plugin : IDisposable
 
         fixed (byte* dataPtr = data)
         {
-            int response = LibExtism.extism_plugin_call(_context.NativeHandle, Index, functionName, dataPtr, data.Length);
-            if (response == 0)
-            {
+            int response = LibExtism.extism_plugin_call(_context.NativeHandle, NativeHandle, functionName, dataPtr, data.Length);
+            if (response == 0) {
                 return OutputData();
-            }
-            else
-            {
+            } else {
                 var errorMsg = GetError();
-                if (errorMsg != null)
-                {
+                if (errorMsg != null) {
                     throw new ExtismException(errorMsg);
-                }
-                else
-                {
+                } else {
                     throw new ExtismException("Call to Extism failed");
                 }
             }
@@ -117,11 +96,11 @@ public class Plugin : IDisposable
     /// Get the length of a plugin's output data.
     /// </summary>
     /// <returns></returns>
-    unsafe internal int OutputLength()
+    internal int OutputLength()
     {
         CheckNotDisposed();
 
-        return (int)LibExtism.extism_plugin_output_length(_context.NativeHandle, Index);
+        return (int)LibExtism.extism_plugin_output_length(_context.NativeHandle, NativeHandle);
     }
 
     /// <summary>
@@ -135,7 +114,7 @@ public class Plugin : IDisposable
 
         unsafe
         {
-            var ptr = LibExtism.extism_plugin_output_data(_context.NativeHandle, Index).ToPointer();
+            var ptr = LibExtism.extism_plugin_output_data(_context.NativeHandle, NativeHandle).ToPointer();
             return new Span<byte>(ptr, length);
         }
     }
@@ -144,11 +123,11 @@ public class Plugin : IDisposable
     /// Get the error associated with the current plugin.
     /// </summary>
     /// <returns></returns>
-    unsafe internal string? GetError()
+    internal string? GetError()
     {
         CheckNotDisposed();
 
-        var result = LibExtism.extism_error(_context.NativeHandle, Index);
+        var result = LibExtism.extism_error(_context.NativeHandle, NativeHandle);
         return Marshal.PtrToStringUTF8(result);
     }
 
@@ -189,7 +168,7 @@ public class Plugin : IDisposable
     /// <summary>
     /// Frees all resources held by this Plugin.
     /// </summary>
-    unsafe protected virtual void Dispose(bool disposing)
+    protected virtual void Dispose(bool disposing)
     {
         if (disposing)
         {
@@ -197,7 +176,7 @@ public class Plugin : IDisposable
         }
 
         // Free up unmanaged resources
-        LibExtism.extism_plugin_free(_context.NativeHandle, Index);
+        LibExtism.extism_plugin_free(_context.NativeHandle, NativeHandle);
     }
 
     /// <summary>
@@ -207,4 +186,4 @@ public class Plugin : IDisposable
     {
         Dispose(false);
     }
-}
+}

dotnet/test/Extism.Sdk/BasicTests.cs

@@ -1,7 +1,6 @@
 using Extism.Sdk.Native;
 
 using System.Reflection;
-using System.Runtime.InteropServices;
 using System.Text;
 
 using Xunit;
@@ -10,17 +9,6 @@ namespace Extism.Sdk.Tests;
 
 public class BasicTests
 {
-    [Fact]
-    public void CountHelloWorldVowelsWithoutContext()
-    {
-        var binDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!;
-        var wasm = File.ReadAllBytes(Path.Combine(binDirectory, "code.wasm"));
-        using var plugin = Plugin.Create(wasm, Array.Empty<HostFunction>(), withWasi: true);
-
-        var response = plugin.CallFunction("count_vowels", Encoding.UTF8.GetBytes("Hello World"));
-        Assert.Equal("{\"count\": 3}", Encoding.UTF8.GetString(response));
-    }
-
     [Fact]
     public void CountHelloWorldVowels()
     {
@@ -28,46 +16,9 @@ public class BasicTests
 
         var binDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!;
         var wasm = File.ReadAllBytes(Path.Combine(binDirectory, "code.wasm"));
-        using var plugin = context.CreatePlugin(wasm, Array.Empty<HostFunction>(), withWasi: true);
+        using var plugin = context.CreatePlugin(wasm, withWasi: true);
 
         var response = plugin.CallFunction("count_vowels", Encoding.UTF8.GetBytes("Hello World"));
         Assert.Equal("{\"count\": 3}", Encoding.UTF8.GetString(response));
     }
-
-    [Fact]
-    public void CountVowelsHostFunctions()
-    {
-        using var context = new Context();
-
-        var userData = Marshal.StringToHGlobalAnsi("Hello again!");
-
-        using var helloWorld = new HostFunction(
-            "hello_world",
-            "env",
-            new[] { ExtismValType.I64 },
-            new[] { ExtismValType.I64 },
-            userData,
-            HelloWorld);
-
-        var binDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!;
-        var wasm = File.ReadAllBytes(Path.Combine(binDirectory, "code-functions.wasm"));
-        using var plugin = context.CreatePlugin(wasm, new[] { helloWorld }, withWasi: true);
-
-        var response = plugin.CallFunction("count_vowels", Encoding.UTF8.GetBytes("Hello World"));
-        Assert.Equal("{\"count\": 3}", Encoding.UTF8.GetString(response));
-
-        void HelloWorld(CurrentPlugin plugin, Span<ExtismVal> inputs, Span<ExtismVal> outputs, nint data)
-        {
-            Console.WriteLine("Hello from .NET!");
-
-            var text = Marshal.PtrToStringAnsi(data);
-            Console.WriteLine(text);
-
-            var input = plugin.ReadString(new nint(inputs[0].v.i64));
-            Console.WriteLine($"Input: {input}");
-
-            var output = new string(input); // clone the string
-            outputs[0].v.i64 = plugin.WriteString(output);
-        }
-    }
-}
+}

dotnet/test/Extism.Sdk/Extism.Sdk.Tests.csproj

@@ -25,9 +25,6 @@
 		<None Include="..\..\..\wasm\code.wasm" Link="code.wasm">
 			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
 		</None>
-		<None Include="..\..\..\wasm\code-functions.wasm" Link="code-functions.wasm">
-			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-		</None>
 	</ItemGroup>
 
 
@@ -35,8 +32,4 @@
 		<ProjectReference Include="..\..\src\Extism.Sdk\Extism.Sdk.csproj" />
 	</ItemGroup>
 
-	<ItemGroup>
-		<PackageReference Include="Extism.runtime.win-x64" Version="0.4.0" />
-	</ItemGroup>
-
 </Project>

dune-project

@@ -21,13 +21,12 @@
  (description "Bindings to Extism, the universal plugin system")
  (depends 
   (ocaml (>= 4.14.1)) 
-  dune
-  (ctypes (>= 0.18.0))
+  (dune (>= 3.2))
   (ctypes-foreign (>= 0.18.0))
   (bigstringaf (>= 0.9.0))
-  (ppx_yojson_conv (>= v0.15.0))
-  (extism-manifest (= :version))
-  (ppx_inline_test (>= v0.15.0))
+  (ppx_yojson_conv (>= 0.15.0))
+  extism-manifest
+  (ppx_inline_test (>= 0.15.0))
   (cmdliner (>= 1.1.1))
  )
  (tags
@@ -36,12 +35,11 @@
 (package
  (name extism-manifest)
  (synopsis "Extism manifest bindings")
- (description "Bindings to the Extism manifest format")
+ (description "Bindings to Extism, the universal plugin system")
  (depends 
   (ocaml (>= 4.14.1)) 
-  dune
-  (ppx_yojson_conv (>= v0.15.0))
-  (ppx_inline_test (>= v0.15.0))
+  (dune (>= 3.2))
+  (ppx_yojson_conv (>= 0.15.0))
   (base64 (>= 3.5.0))
  )
  (tags

elixir/lib/extism/cancel_handle.ex

@@ -1,31 +0,0 @@
-defmodule Extism.CancelHandle do
-  @moduledoc """
-  A CancelHandle is a handle generated by a plugin that allows it to be cancelled from another
-  thread while running.
-  """
-  defstruct [
-    # The actual NIF Resource. PluginIndex and the context
-    handle: nil
-  ]
-
-  def wrap_resource(handle) do
-    %__MODULE__{
-      handle: handle
-    }
-  end
-
-  @doc """
-  Cancel plugin execution
-  """
-  def cancel(handle) do
-    Extism.Native.plugin_cancel(handle.handle)
-  end
-end
-
-defimpl Inspect, for: Extim.CancelHandle do
-  import Inspect.Algebra
-
-  def inspect(dict, opts) do
-    concat(["#Extism.CancelHandle<", to_doc(dict.handle, opts), ">"])
-  end
-end

elixir/lib/extism/native.ex

@@ -16,8 +16,6 @@ defmodule Extism.Native do
   def plugin_has_function(_ctx, _plugin_id, _function_name), do: error()
   def plugin_free(_ctx, _plugin_id), do: error()
   def set_log_file(_filename, _level), do: error()
-  def plugin_cancel_handle(_ctx, _plugin_id), do: error()
-  def plugin_cancel(_handle), do: error()
 
   defp error, do: :erlang.nif_error(:nif_not_loaded)
 end

elixir/lib/extism/plugin.ex

@@ -15,25 +15,12 @@ defmodule Extism.Plugin do
     }
   end
 
-  @doc """
-  Creates a new plugin
-  """
-  def new(manifest, wasi \\ false, context \\ nil) do
-    ctx = context || Extism.Context.new()
-    {:ok, manifest_payload} = JSON.encode(manifest)
-
-    case Extism.Native.plugin_new_with_manifest(ctx.ptr, manifest_payload, wasi) do
-      {:error, err} -> {:error, err}
-      res -> {:ok, Extism.Plugin.wrap_resource(ctx, res)}
-    end
-  end
-
   @doc """
   Call a plugin's function by name
 
   ## Examples
 
-      iex> {:ok, plugin} = Extism.Plugin.new(manifest, false)
+      iex> {:ok, plugin} = Extism.Context.new_plugin(ctx, manifest, false)
       iex> {:ok, output} = Extism.Plugin.call(plugin, "count_vowels", "this is a test")
          # {:ok, "{\"count\": 4}"}
 

elixir/mix.exs

@@ -4,7 +4,7 @@ defmodule Extism.MixProject do
   def project do
     [
       app: :extism,
-      version: "0.4.0",
+      version: "0.1.0",
       elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
@@ -23,7 +23,7 @@ defmodule Extism.MixProject do
 
   defp deps do
     [
-      {:rustler, "~> 0.29.1"},
+      {:rustler, "~> 0.26.0"},
       {:json, "~> 1.4"},
       {:ex_doc, "~> 0.21", only: :dev, runtime: false}
     ]

elixir/mix.lock

@@ -1,12 +1,12 @@
 %{
-  "earmark_parser": {:hex, :earmark_parser, "1.4.33", "3c3fd9673bb5dcc9edc28dd90f50c87ce506d1f71b70e3de69aa8154bc695d44", [:mix], [], "hexpm", "2d526833729b59b9fdb85785078697c72ac5e5066350663e5be6a1182da61b8f"},
-  "ex_doc": {:hex, :ex_doc, "0.30.5", "aa6da96a5c23389d7dc7c381eba862710e108cee9cfdc629b7ec021313900e9e", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "88a1e115dcb91cefeef7e22df4a6ebbe4634fbf98b38adcbc25c9607d6d9d8e6"},
+  "earmark_parser": {:hex, :earmark_parser, "1.4.29", "149d50dcb3a93d9f3d6f3ecf18c918fb5a2d3c001b5d3305c926cddfbd33355b", [:mix], [], "hexpm", "4902af1b3eb139016aed210888748db8070b8125c2342ce3dcae4f38dcc63503"},
+  "ex_doc": {:hex, :ex_doc, "0.29.1", "b1c652fa5f92ee9cf15c75271168027f92039b3877094290a75abcaac82a9f77", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "b7745fa6374a36daf484e2a2012274950e084815b936b1319aeebcf7809574f6"},
   "jason": {:hex, :jason, "1.4.0", "e855647bc964a44e2f67df589ccf49105ae039d4179db7f6271dfd3843dc27e6", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "79a3791085b2a0f743ca04cec0f7be26443738779d09302e01318f97bdb82121"},
   "json": {:hex, :json, "1.4.1", "8648f04a9439765ad449bc56a3ff7d8b11dd44ff08ffcdefc4329f7c93843dfa", [:mix], [], "hexpm", "9abf218dbe4ea4fcb875e087d5f904ef263d012ee5ed21d46e9dbca63f053d16"},
   "makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
-  "makeup_elixir": {:hex, :makeup_elixir, "0.16.1", "cc9e3ca312f1cfeccc572b37a09980287e243648108384b97ff2b76e505c3555", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "e127a341ad1b209bd80f7bd1620a15693a9908ed780c3b763bccf7d200c767c6"},
-  "makeup_erlang": {:hex, :makeup_erlang, "0.1.2", "ad87296a092a46e03b7e9b0be7631ddcf64c790fa68a9ef5323b6cbb36affc72", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "f3f5a1ca93ce6e092d92b6d9c049bcda58a3b617a8d888f8e7231c85630e8108"},
-  "nimble_parsec": {:hex, :nimble_parsec, "1.3.1", "2c54013ecf170e249e9291ed0a62e5832f70a476c61da16f6aac6dca0189f2af", [:mix], [], "hexpm", "2682e3c0b2eb58d90c6375fc0cc30bc7be06f365bf72608804fb9cffa5e1b167"},
-  "rustler": {:hex, :rustler, "0.29.1", "880f20ae3027bd7945def6cea767f5257bc926f33ff50c0d5d5a5315883c084d", [:mix], [{:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:toml, "~> 0.6", [hex: :toml, repo: "hexpm", optional: false]}], "hexpm", "109497d701861bfcd26eb8f5801fe327a8eef304f56a5b63ef61151ff44ac9b6"},
-  "toml": {:hex, :toml, "0.7.0", "fbcd773caa937d0c7a02c301a1feea25612720ac3fa1ccb8bfd9d30d822911de", [:mix], [], "hexpm", "0690246a2478c1defd100b0c9b89b4ea280a22be9a7b313a8a058a2408a2fa70"},
+  "makeup_elixir": {:hex, :makeup_elixir, "0.16.0", "f8c570a0d33f8039513fbccaf7108c5d750f47d8defd44088371191b76492b0b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "28b2cbdc13960a46ae9a8858c4bebdec3c9a6d7b4b9e7f4ed1502f8159f338e7"},
+  "makeup_erlang": {:hex, :makeup_erlang, "0.1.1", "3fcb7f09eb9d98dc4d208f49cc955a34218fc41ff6b84df7c75b3e6e533cc65f", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "174d0809e98a4ef0b3309256cbf97101c6ec01c4ab0b23e926a9e17df2077cbb"},
+  "nimble_parsec": {:hex, :nimble_parsec, "1.2.3", "244836e6e3f1200c7f30cb56733fd808744eca61fd182f731eac4af635cc6d0b", [:mix], [], "hexpm", "c8d789e39b9131acf7b99291e93dae60ab48ef14a7ee9d58c6964f59efb570b0"},
+  "rustler": {:hex, :rustler, "0.26.0", "06a2773d453ee3e9109efda643cf2ae633dedea709e2455ac42b83637c9249bf", [:mix], [{:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:toml, "~> 0.6", [hex: :toml, repo: "hexpm", optional: false]}], "hexpm", "42961e9d2083d004d5a53e111ad1f0c347efd9a05cb2eb2ffa1d037cdc74db91"},
+  "toml": {:hex, :toml, "0.6.2", "38f445df384a17e5d382befe30e3489112a48d3ba4c459e543f748c2f25dd4d1", [:mix], [], "hexpm", "d013e45126d74c0c26a38d31f5e8e9b83ea19fc752470feb9a86071ca5a672fa"},
 }

elixir/native/extism_nif/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "extism_nif"
-version = "0.3.0"
+version = "0.1.0"
 edition = "2021"
 authors = ["Benjamin Eckel <bhelx@simst.im>"]
 
@@ -9,10 +9,7 @@ name = "extism_nif"
 path = "src/lib.rs"
 crate-type = ["cdylib"]
 
-# need this to be here and be empty
-[workspace]
-
 [dependencies]
-rustler = "0.28.0"
-extism = "0.4.0"
+rustler = "0.26.0"
+extism = { version = "0.1.0", path = "../../../rust" }
 log = "0.4"

elixir/native/extism_nif/src/lib.rs

@@ -17,24 +17,22 @@ mod atoms {
 struct ExtismContext {
     ctx: RwLock<Context>,
 }
+
 unsafe impl Sync for ExtismContext {}
 unsafe impl Send for ExtismContext {}
 
-struct ExtismCancelHandle {
-    handle: RwLock<extism::CancelHandle>,
-}
-
-unsafe impl Sync for ExtismCancelHandle {}
-unsafe impl Send for ExtismCancelHandle {}
-
 fn load(env: Env, _: Term) -> bool {
     rustler::resource!(ExtismContext, env);
-    rustler::resource!(ExtismCancelHandle, env);
     true
 }
 
 fn to_rustler_error(extism_error: extism::Error) -> rustler::Error {
-    rustler::Error::Term(Box::new(extism_error.to_string()))
+    match extism_error {
+        extism::Error::UnableToLoadPlugin(msg) => rustler::Error::Term(Box::new(msg)),
+        extism::Error::Message(msg) => rustler::Error::Term(Box::new(msg)),
+        extism::Error::Json(json_err) => rustler::Error::Term(Box::new(json_err.to_string())),
+        extism::Error::Runtime(e) => rustler::Error::Term(Box::new(e.to_string())),
+    }
 }
 
 #[rustler::nif]
@@ -52,7 +50,7 @@ fn context_reset(ctx: ResourceArc<ExtismContext>) {
 
 #[rustler::nif]
 fn context_free(ctx: ResourceArc<ExtismContext>) {
-    let context = ctx.ctx.read().unwrap();
+    let context = &ctx.ctx.read().unwrap();
     std::mem::drop(context)
 }
 
@@ -62,8 +60,8 @@ fn plugin_new_with_manifest(
     manifest_payload: String,
     wasi: bool,
 ) -> Result<i32, rustler::Error> {
-    let context = ctx.ctx.write().unwrap();
-    let result = match Plugin::new(&context, manifest_payload, [], wasi) {
+    let context = &ctx.ctx.write().unwrap();
+    let result = match Plugin::new(context, manifest_payload, wasi) {
         Err(e) => Err(to_rustler_error(e)),
         Ok(plugin) => {
             let plugin_id = plugin.as_i32();
@@ -87,7 +85,7 @@ fn plugin_call(
     let mut plugin = unsafe { Plugin::from_id(plugin_id, context) };
     let result = match plugin.call(name, input) {
         Err(e) => Err(to_rustler_error(e)),
-        Ok(result) => match str::from_utf8(result) {
+        Ok(result) => match str::from_utf8(&result) {
             Ok(output) => Ok(output.to_string()),
             Err(_e) => Err(rustler::Error::Term(Box::new(
                 "Could not read output from plugin",
@@ -109,7 +107,7 @@ fn plugin_update_manifest(
 ) -> Result<(), rustler::Error> {
     let context = &ctx.ctx.read().unwrap();
     let mut plugin = unsafe { Plugin::from_id(plugin_id, context) };
-    let result = match plugin.update(manifest_payload, [], wasi) {
+    let result = match plugin.update(manifest_payload, wasi) {
         Ok(()) => Ok(()),
         Err(e) => Err(to_rustler_error(e)),
     };
@@ -119,24 +117,6 @@ fn plugin_update_manifest(
     result
 }
 
-#[rustler::nif]
-fn plugin_cancel_handle(
-    ctx: ResourceArc<ExtismContext>,
-    plugin_id: i32,
-) -> Result<ResourceArc<ExtismCancelHandle>, rustler::Error> {
-    let context = &ctx.ctx.read().unwrap();
-    let plugin = unsafe { Plugin::from_id(plugin_id, context) };
-    let handle = plugin.cancel_handle();
-    Ok(ResourceArc::new(ExtismCancelHandle {
-        handle: RwLock::new(handle),
-    }))
-}
-
-#[rustler::nif]
-fn plugin_cancel(handle: ResourceArc<ExtismCancelHandle>) -> bool {
-    handle.handle.read().unwrap().cancel()
-}
-
 #[rustler::nif]
 fn plugin_free(ctx: ResourceArc<ExtismContext>, plugin_id: i32) -> Result<(), rustler::Error> {
     let context = &ctx.ctx.read().unwrap();
@@ -190,8 +170,6 @@ rustler::init!(
         plugin_call,
         plugin_update_manifest,
         plugin_has_function,
-        plugin_cancel_handle,
-        plugin_cancel,
         plugin_free,
         set_log_file,
     ],

extism-manifest.opam

@@ -1,7 +1,7 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
 synopsis: "Extism manifest bindings"
-description: "Bindings to the Extism manifest format"
+description: "Bindings to Extism, the universal plugin system"
 maintainer: ["Extism Authors <oss@extism.org>"]
 authors: ["Extism Authors <oss@extism.org>"]
 license: "BSD-3-Clause"
@@ -11,9 +11,8 @@ doc: "https://github.com/extism/extism"
 bug-reports: "https://github.com/extism/extism/issues"
 depends: [
   "ocaml" {>= "4.14.1"}
-  "dune" {>= "3.2"}
-  "ppx_yojson_conv" {>= "v0.15.0"}
-  "ppx_inline_test" {>= "v0.15.0"}
+  "dune" {>= "3.2" & >= "3.2"}
+  "ppx_yojson_conv" {>= "0.15.0"}
   "base64" {>= "3.5.0"}
   "odoc" {with-doc}
 ]

extism.go

@@ -5,50 +5,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"runtime/cgo"
 	"unsafe"
 )
 
 /*
-#cgo CFLAGS: -I/usr/local/include
-#cgo LDFLAGS: -L/usr/local/lib -lextism
+#cgo pkg-config: libextism.pc
 #include <extism.h>
 #include <stdlib.h>
-
-int64_t extism_val_i64(ExtismValUnion* x){
-	return x->i64;
-}
-
-int32_t extism_val_i32(ExtismValUnion* x){
-	return x->i32;
-}
-
-float extism_val_f32(ExtismValUnion* x){
-	return x->f32;
-}
-
-double extism_val_f64(ExtismValUnion* x){
-	return x->f64;
-}
-
-
-void extism_val_set_i64(ExtismValUnion* x, int64_t i){
-	x->i64 = i;
-}
-
-
-void extism_val_set_i32(ExtismValUnion* x, int32_t i){
-	x->i32 = i;
-}
-
-void extism_val_set_f32(ExtismValUnion* x, float f){
-	x->f32 = f;
-}
-
-void extism_val_set_f64(ExtismValUnion* x, double f){
-	x->f64 = f;
-}
-
 */
 import "C"
 
@@ -57,106 +20,6 @@ type Context struct {
 	pointer *C.ExtismContext
 }
 
-type ValType = C.ExtismValType
-
-type Val = C.ExtismVal
-
-type Size = C.ExtismSize
-
-var (
-	I32       ValType = C.I32
-	I64       ValType = C.I64
-	F32       ValType = C.F32
-	F64       ValType = C.F64
-	V128      ValType = C.V128
-	FuncRef   ValType = C.FuncRef
-	ExternRef ValType = C.ExternRef
-)
-
-// Function is used to define host functions
-type Function struct {
-	pointer  *C.ExtismFunction
-	userData cgo.Handle
-}
-
-// Free a function
-func (f *Function) Free() {
-	C.extism_function_free(f.pointer)
-	f.pointer = nil
-	f.userData.Delete()
-}
-
-// NewFunction creates a new host function with the given name, input/outputs and optional user data, which can be an
-// arbitrary `interface{}`
-func NewFunction(name string, inputs []ValType, outputs []ValType, f unsafe.Pointer, userData interface{}) Function {
-	var function Function
-	function.userData = cgo.NewHandle(userData)
-	cname := C.CString(name)
-	ptr := unsafe.Pointer(function.userData)
-	var inputsPtr *C.ExtismValType = nil
-	if len(inputs) > 0 {
-		inputsPtr = (*C.ExtismValType)(&inputs[0])
-	}
-	var outputsPtr *C.ExtismValType = nil
-	if len(outputs) > 0 {
-		outputsPtr = (*C.ExtismValType)(&outputs[0])
-	}
-	function.pointer = C.extism_function_new(
-		cname,
-		inputsPtr,
-		C.uint64_t(len(inputs)),
-		outputsPtr,
-		C.uint64_t(len(outputs)),
-		(*[0]byte)(f),
-		ptr,
-		nil,
-	)
-	C.free(unsafe.Pointer(cname))
-	return function
-}
-
-func (f *Function) SetNamespace(s string) {
-	cstr := C.CString(s)
-	defer C.free(unsafe.Pointer(cstr))
-	C.extism_function_set_namespace(f.pointer, cstr)
-}
-
-func (f Function) WithNamespace(s string) Function {
-	f.SetNamespace(s)
-	return f
-}
-
-type CurrentPlugin struct {
-	pointer *C.ExtismCurrentPlugin
-}
-
-func GetCurrentPlugin(ptr unsafe.Pointer) CurrentPlugin {
-	return CurrentPlugin{
-		pointer: (*C.ExtismCurrentPlugin)(ptr),
-	}
-}
-
-func (p *CurrentPlugin) Memory(offs uint) []byte {
-	length := C.extism_current_plugin_memory_length(p.pointer, C.uint64_t(offs))
-	data := unsafe.Pointer(C.extism_current_plugin_memory(p.pointer))
-	return unsafe.Slice((*byte)(unsafe.Add(data, offs)), C.int(length))
-}
-
-// Alloc a new memory block of the given length, returning its offset
-func (p *CurrentPlugin) Alloc(n uint) uint {
-	return uint(C.extism_current_plugin_memory_alloc(p.pointer, C.uint64_t(n)))
-}
-
-// Free the memory block specified by the given offset
-func (p *CurrentPlugin) Free(offs uint) {
-	C.extism_current_plugin_memory_free(p.pointer, C.uint64_t(offs))
-}
-
-// Length returns the number of bytes allocated at the specified offset
-func (p *CurrentPlugin) Length(offs uint) uint {
-	return uint(C.extism_current_plugin_memory_length(p.pointer, C.uint64_t(offs)))
-}
-
 // NewContext creates a new context, it should be freed using the `Free` method
 func NewContext() Context {
 	p := C.extism_context_new()
@@ -173,9 +36,8 @@ func (ctx *Context) Free() {
 
 // Plugin is used to call WASM functions
 type Plugin struct {
-	ctx       *Context
-	id        int32
-	functions []Function
+	ctx *Context
+	id  int32
 }
 
 type WasmData struct {
@@ -234,32 +96,14 @@ func ExtismVersion() string {
 	return C.GoString(C.extism_version())
 }
 
-func register(ctx *Context, data []byte, functions []Function, wasi bool) (Plugin, error) {
+func register(ctx *Context, data []byte, wasi bool) (Plugin, error) {
 	ptr := makePointer(data)
-	functionPointers := []*C.ExtismFunction{}
-	for _, f := range functions {
-		functionPointers = append(functionPointers, f.pointer)
-	}
-	plugin := C.int32_t(-1)
-
-	if len(functions) == 0 {
-		plugin = C.extism_plugin_new(
-			ctx.pointer,
-			(*C.uchar)(ptr),
-			C.uint64_t(len(data)),
-			nil,
-			0,
-			C._Bool(wasi))
-	} else {
-		plugin = C.extism_plugin_new(
-			ctx.pointer,
-			(*C.uchar)(ptr),
-			C.uint64_t(len(data)),
-			&functionPointers[0],
-			C.uint64_t(len(functions)),
-			C._Bool(wasi),
-		)
-	}
+	plugin := C.extism_plugin_new(
+		ctx.pointer,
+		(*C.uchar)(ptr),
+		C.uint64_t(len(data)),
+		C._Bool(wasi),
+	)
 
 	if plugin < 0 {
 		err := C.extism_error(ctx.pointer, C.int32_t(-1))
@@ -273,44 +117,21 @@ func register(ctx *Context, data []byte, functions []Function, wasi bool) (Plugi
 		)
 	}
 
-	return Plugin{id: int32(plugin), ctx: ctx, functions: functions}, nil
+	return Plugin{id: int32(plugin), ctx: ctx}, nil
 }
 
-func update(ctx *Context, plugin int32, data []byte, functions []Function, wasi bool) error {
+func update(ctx *Context, plugin int32, data []byte, wasi bool) error {
 	ptr := makePointer(data)
-	functionPointers := []*C.ExtismFunction{}
-	for _, f := range functions {
-		functionPointers = append(functionPointers, f.pointer)
-	}
+	b := bool(C.extism_plugin_update(
+		ctx.pointer,
+		C.int32_t(plugin),
+		(*C.uchar)(ptr),
+		C.uint64_t(len(data)),
+		C._Bool(wasi),
+	))
 
-	if len(functions) == 0 {
-		b := bool(C.extism_plugin_update(
-			ctx.pointer,
-			C.int32_t(plugin),
-			(*C.uchar)(ptr),
-			C.uint64_t(len(data)),
-			nil,
-			0,
-			C._Bool(wasi),
-		))
-
-		if b {
-			return nil
-		}
-	} else {
-		b := bool(C.extism_plugin_update(
-			ctx.pointer,
-			C.int32_t(plugin),
-			(*C.uchar)(ptr),
-			C.uint64_t(len(data)),
-			&functionPointers[0],
-			C.uint64_t(len(functions)),
-			C._Bool(wasi),
-		))
-
-		if b {
-			return nil
-		}
+	if b {
+		return nil
 	}
 
 	err := C.extism_error(ctx.pointer, C.int32_t(-1))
@@ -324,57 +145,44 @@ func update(ctx *Context, plugin int32, data []byte, functions []Function, wasi
 	)
 }
 
-// NewPlugin creates a plugin in its own context
-func NewPlugin(module io.Reader, functions []Function, wasi bool) (Plugin, error) {
-	ctx := NewContext()
-	return ctx.Plugin(module, functions, wasi)
-}
-
-// NewPlugin creates a plugin in its own context from a manifest
-func NewPluginFromManifest(manifest Manifest, functions []Function, wasi bool) (Plugin, error) {
-	ctx := NewContext()
-	return ctx.PluginFromManifest(manifest, functions, wasi)
-}
-
 // PluginFromManifest creates a plugin from a `Manifest`
-func (ctx *Context) PluginFromManifest(manifest Manifest, functions []Function, wasi bool) (Plugin, error) {
+func (ctx *Context) PluginFromManifest(manifest Manifest, wasi bool) (Plugin, error) {
 	data, err := json.Marshal(manifest)
 	if err != nil {
 		return Plugin{id: -1}, err
 	}
 
-	return register(ctx, data, functions, wasi)
+	return register(ctx, data, wasi)
 }
 
 // Plugin creates a plugin from a WASM module
-func (ctx *Context) Plugin(module io.Reader, functions []Function, wasi bool) (Plugin, error) {
+func (ctx *Context) Plugin(module io.Reader, wasi bool) (Plugin, error) {
 	wasm, err := io.ReadAll(module)
 	if err != nil {
 		return Plugin{id: -1}, err
 	}
 
-	return register(ctx, wasm, functions, wasi)
+	return register(ctx, wasm, wasi)
 }
 
 // Update a plugin with a new WASM module
-func (p *Plugin) Update(module io.Reader, functions []Function, wasi bool) error {
+func (p *Plugin) Update(module io.Reader, wasi bool) error {
 	wasm, err := io.ReadAll(module)
 	if err != nil {
 		return err
 	}
-	p.functions = functions
-	return update(p.ctx, p.id, wasm, functions, wasi)
+
+	return update(p.ctx, p.id, wasm, wasi)
 }
 
 // Update a plugin with a new Manifest
-func (p *Plugin) UpdateManifest(manifest Manifest, functions []Function, wasi bool) error {
+func (p *Plugin) UpdateManifest(manifest Manifest, wasi bool) error {
 	data, err := json.Marshal(manifest)
 	if err != nil {
 		return err
 	}
 
-	p.functions = functions
-	return update(p.ctx, p.id, data, functions, wasi)
+	return update(p.ctx, p.id, data, wasi)
 }
 
 // Set configuration values
@@ -425,7 +233,8 @@ func (plugin Plugin) Call(functionName string, input []byte) ([]byte, error) {
 
 	if length > 0 {
 		x := C.extism_plugin_output_data(plugin.ctx.pointer, C.int32_t(plugin.id))
-		return unsafe.Slice((*byte)(x), C.int(length)), nil
+		y := (*[]byte)(unsafe.Pointer(&x))
+		return []byte((*y)[0:length]), nil
 	}
 
 	return []byte{}, nil
@@ -444,80 +253,3 @@ func (plugin *Plugin) Free() {
 func (ctx Context) Reset() {
 	C.extism_context_reset(ctx.pointer)
 }
-
-// ValGetI64 returns an I64 from an ExtismVal, it accepts a pointer to a C.ExtismVal
-func ValGetI64(v unsafe.Pointer) int64 {
-	return int64(C.extism_val_i64(&(*Val)(v).v))
-}
-
-// ValGetUInt returns a uint from an ExtismVal, it accepts a pointer to a C.ExtismVal
-func ValGetUInt(v unsafe.Pointer) uint {
-	return uint(C.extism_val_i64(&(*Val)(v).v))
-}
-
-// ValGetI32 returns an int32 from an ExtismVal, it accepts a pointer to a C.ExtismVal
-func ValGetI32(v unsafe.Pointer) int32 {
-	return int32(C.extism_val_i32(&(*Val)(v).v))
-}
-
-// ValGetF32 returns a float32 from an ExtismVal, it accepts a pointer to a C.ExtismVal
-func ValGetF32(v unsafe.Pointer) float32 {
-	return float32(C.extism_val_f32(&(*Val)(v).v))
-}
-
-// ValGetF32 returns a float64 from an ExtismVal, it accepts a pointer to a C.ExtismVal
-func ValGetF64(v unsafe.Pointer) float64 {
-	return float64(C.extism_val_i64(&(*Val)(v).v))
-}
-
-// ValSetI64 stores an int64 in an ExtismVal, it accepts a pointer to a C.ExtismVal and the new value
-func ValSetI64(v unsafe.Pointer, i int64) {
-	C.extism_val_set_i64(&(*Val)(v).v, C.int64_t(i))
-}
-
-// ValSetI32 stores an int32 in an ExtismVal, it accepts a pointer to a C.ExtismVal and the new value
-func ValSetI32(v unsafe.Pointer, i int32) {
-	C.extism_val_set_i32(&(*Val)(v).v, C.int32_t(i))
-}
-
-// ValSetF32 stores a float32 in an ExtismVal, it accepts a pointer to a C.ExtismVal and the new value
-func ValSetF32(v unsafe.Pointer, i float32) {
-	C.extism_val_set_f32(&(*Val)(v).v, C.float(i))
-}
-
-// ValSetF64 stores a float64 in an ExtismVal, it accepts a pointer to a C.ExtismVal and the new value
-func ValSetF64(v unsafe.Pointer, f float64) {
-	C.extism_val_set_f64(&(*Val)(v).v, C.double(f))
-}
-
-func (p *CurrentPlugin) ReturnBytes(v unsafe.Pointer, b []byte) {
-	mem := p.Alloc(uint(len(b)))
-	ptr := p.Memory(mem)
-	copy(ptr, b)
-	ValSetI64(v, int64(mem))
-}
-
-func (p *CurrentPlugin) ReturnString(v unsafe.Pointer, s string) {
-	p.ReturnBytes(v, []byte(s))
-}
-
-func (p *CurrentPlugin) InputBytes(v unsafe.Pointer) []byte {
-	return p.Memory(ValGetUInt(v))
-}
-
-func (p *CurrentPlugin) InputString(v unsafe.Pointer) string {
-	return string(p.InputBytes(v))
-}
-
-type CancelHandle struct {
-	pointer *C.ExtismCancelHandle
-}
-
-func (p *Plugin) CancelHandle() CancelHandle {
-	pointer := C.extism_plugin_cancel_handle(p.ctx.pointer, C.int(p.id))
-	return CancelHandle{pointer}
-}
-
-func (c *CancelHandle) Cancel() bool {
-	return bool(C.extism_plugin_cancel(c.pointer))
-}

extism.opam

@@ -11,13 +11,12 @@ doc: "https://github.com/extism/extism"
 bug-reports: "https://github.com/extism/extism/issues"
 depends: [
   "ocaml" {>= "4.14.1"}
-  "dune" {>= "3.2"}
-  "ctypes" {>= "0.18.0"}
+  "dune" {>= "3.2" & >= "3.2"}
   "ctypes-foreign" {>= "0.18.0"}
   "bigstringaf" {>= "0.9.0"}
-  "ppx_yojson_conv" {>= "v0.15.0"}
-  "extism-manifest" {= version}
-  "ppx_inline_test" {>= "v0.15.0"}
+  "ppx_yojson_conv" {>= "0.15.0"}
+  "extism-manifest"
+  "ppx_inline_test" {>= "0.15.0"}
   "cmdliner" {>= "1.1.1"}
   "odoc" {with-doc}
 ]
@@ -36,5 +35,3 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/extism/extism.git"
-build-env: [EXTISM_TEST_NO_LIB = ""]
-post-messages: ["See https://extism.org/docs/install/ for information about installing libextism"]

extism.opam.template

@@ -1,2 +0,0 @@
-build-env: [EXTISM_TEST_NO_LIB = ""]
-post-messages: ["See https://extism.org/docs/install/ for information about installing libextism"]

extism_test.go

@@ -4,19 +4,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"testing"
-	"time"
 )
 
-func manifest(functions bool) Manifest {
-	path := "./wasm/code.wasm"
-	if functions {
-		path = "./wasm/code-functions.wasm"
-	}
-
+func manifest() Manifest {
 	return Manifest{
 		Wasm: []Wasm{
 			WasmFile{
-				Path: path,
+				Path: "./wasm/code.wasm",
 			},
 		},
 	}
@@ -44,7 +38,7 @@ func TestCallPlugin(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -64,7 +58,7 @@ func TestFreePlugin(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -84,7 +78,7 @@ func TestContextReset(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -104,7 +98,7 @@ func TestCanUpdateAManifest(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -113,7 +107,7 @@ func TestCanUpdateAManifest(t *testing.T) {
 		t.Error(err)
 	}
 
-	plugin.UpdateManifest(manifest(false), []Function{}, false)
+	plugin.UpdateManifest(manifest(), false)
 
 	// can still call the plugin
 	if err := expectVowelCount(plugin, "this is a test", 4); err != nil {
@@ -125,7 +119,7 @@ func TestFunctionExists(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -142,7 +136,7 @@ func TestErrorsOnUnknownFunction(t *testing.T) {
 	ctx := NewContext()
 	defer ctx.Free()
 
-	plugin, err := ctx.PluginFromManifest(manifest(false), []Function{}, false)
+	plugin, err := ctx.PluginFromManifest(manifest(), false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -152,33 +146,3 @@ func TestErrorsOnUnknownFunction(t *testing.T) {
 		t.Fatal("Was expecting call to unknown function to fail")
 	}
 }
-
-func TestCancel(t *testing.T) {
-	manifest := Manifest{
-		Wasm: []Wasm{
-			WasmFile{
-				Path: "./wasm/loop.wasm",
-			},
-		},
-	}
-
-	ctx := NewContext()
-	defer ctx.Free()
-
-	plugin, err := ctx.PluginFromManifest(manifest, []Function{}, false)
-	if err != nil {
-		t.Error(err)
-	}
-
-	cancelHandle := plugin.CancelHandle()
-
-	go func(handle CancelHandle) {
-		time.Sleep(time.Second * 1)
-		handle.Cancel()
-	}(cancelHandle)
-
-	_, err = plugin.Call("infinite_loop", []byte(""))
-	if err == nil {
-		t.Fail()
-	}
-}

go/main.go

@@ -4,38 +4,17 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
-	"runtime/cgo"
-	"unsafe"
 
 	"github.com/extism/extism"
 )
 
-/*
-#include <extism.h>
-EXTISM_GO_FUNCTION(hello_world);
-*/
-import "C"
-
-//export hello_world
-func hello_world(plugin unsafe.Pointer, inputs *C.ExtismVal, nInputs C.ExtismSize, outputs *C.ExtismVal, nOutputs C.ExtismSize, userData uintptr) {
-	fmt.Println("Hello from Go!")
-	s := cgo.Handle(userData)
-	fmt.Println(s.Value().(string))
-	inputSlice := unsafe.Slice(inputs, nInputs)
-	outputSlice := unsafe.Slice(outputs, nOutputs)
-
-	// Get memory pointed to by first element of input slice
-	p := extism.GetCurrentPlugin(plugin)
-	str := p.InputString(unsafe.Pointer(&inputSlice[0]))
-	fmt.Println(str)
-
-	outputSlice[0] = inputSlice[0]
-}
-
 func main() {
 	version := extism.ExtismVersion()
 	fmt.Println("Extism Version: ", version)
 
+	ctx := extism.NewContext()
+	defer ctx.Free() // this will free the context and all associated plugins
+
 	// set some input data to provide to the plugin module
 	var data []byte
 	if len(os.Args) > 1 {
@@ -43,10 +22,9 @@ func main() {
 	} else {
 		data = []byte("testing from go -> wasm shared memory...")
 	}
-	manifest := extism.Manifest{Wasm: []extism.Wasm{extism.WasmFile{Path: "../wasm/code-functions.wasm"}}}
-	f := extism.NewFunction("hello_world", []extism.ValType{extism.I64}, []extism.ValType{extism.I64}, C.hello_world, "Hello again!")
-	defer f.Free()
-	plugin, err := extism.NewPluginFromManifest(manifest, []extism.Function{f}, true)
+
+	manifest := extism.Manifest{Wasm: []extism.Wasm{extism.WasmFile{Path: "../wasm/code.wasm"}}}
+	plugin, err := ctx.PluginFromManifest(manifest, false)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)

haskell/CHANGELOG.md

@@ -1,5 +1,5 @@
 # Revision history for extism
 
-## 0.2.0.0 -- 2023-01-16
+## 0.1.0.0 -- YYYY-mm-dd
 
 * First version. Released on an unsuspecting world.

haskell/Example.hs

@@ -1,24 +1,16 @@
 module Main where
 
 import Extism
-import Extism.CurrentPlugin
 import Extism.Manifest(manifest, wasmFile)
 
 unwrap (Right x) = x
 unwrap (Left (ExtismError msg)) = do
   error msg
 
-hello plugin params msg = do
-  putStrLn "Hello from Haskell!"
-  putStrLn msg
-  offs <- allocBytes plugin (toByteString "{\"count\": 999}")
-  return [toI64 offs]
-
 main = do
-  setLogFile "stdout" Error
-  let m = manifest [wasmFile "../wasm/code-functions.wasm"]
-  f <- hostFunction "hello_world" [I64] [I64] hello "Hello, again"
-  plugin <- unwrap <$> createPluginFromManifest m [f] True
-  res <- unwrap <$> call plugin "count_vowels" (toByteString "this is a test")
-  putStrLn (fromByteString res)
-  free plugin
+  let m = manifest [wasmFile "../wasm/code.wasm"]
+  context <- Extism.newContext
+  plugin <- unwrap <$> Extism.pluginFromManifest context m False
+  res <- unwrap <$> Extism.call plugin "count_vowels" (Extism.toByteString "this is a test")
+  putStrLn (Extism.fromByteString res)
+  Extism.free plugin

haskell/Makefile

@@ -13,9 +13,6 @@ clean:
 	cabal clean
 
 publish: clean prepare
-	cabal v2-haddock --haddock-for-hackage ./manifest/extism-manifest.cabal
-	cabal v2-haddock --haddock-for-hackage
-	cabal sdist ./manifest/extism-manifest.cabal
 	cabal sdist
 	# TODO: upload
 

haskell/extism.cabal

@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               extism
-version:            0.3.0
+version:            0.0.1
 license:            BSD-3-Clause
 maintainer:         oss@extism.org
 author:             Extism authors
@@ -8,10 +8,10 @@ bug-reports:        https://github.com/extism/extism
 synopsis:           Extism bindings
 description:        Bindings to Extism, the universal plugin system
 category:           Plugins, WebAssembly
-extra-doc-files: CHANGELOG.md
+extra-source-files: CHANGELOG.md
 
 library
-    exposed-modules:    Extism Extism.CurrentPlugin
+    exposed-modules:    Extism
     reexported-modules: Extism.Manifest
     hs-source-dirs:     src
     other-modules:      Extism.Bindings
@@ -19,10 +19,10 @@ library
     extra-libraries:    extism
     extra-lib-dirs:     /usr/local/lib
     build-depends:
-        base              >= 4.16.1 && < 5,
-        bytestring        >= 0.11.3 && <= 0.12,
-        json              >= 0.10 && <= 0.11,
-        extism-manifest   >= 0.0.0 && < 0.3.0
+        base              >= 4.16.1 && < 4.18.0,
+        bytestring        >= 0.11.3 && < 0.12,
+        json              >= 0.10 && < 0.11,
+        extism-manifest   >= 0.0.0 && < 0.1.0
 
 test-suite extism-example
     type:             exitcode-stdio-1.0

haskell/manifest/Extism/JSON.hs

@@ -16,16 +16,14 @@ isNull JSNull = True
 isNull _ = False
 filterNulls obj = [(a, b) | (a, b) <- obj, not (isNull b)]
 object x = makeObj $ filterNulls x
-objectWithNulls = makeObj
-nonNull = NotNull
+objectWithNulls x = makeObj x
+nonNull x = NotNull x
 null' = Null
 (.=) a b = (a, showJSON b)
 toNullable (Just x) = NotNull x
 toNullable Nothing = Null
 fromNullable (NotNull x) = Just x
 fromNullable Null = Nothing
-fromNotNull (NotNull x) = x
-fromNotNull Null = error "Value is Null"
 mapNullable f Null = Null
 mapNullable f (NotNull x) = NotNull (f x)
 
@@ -40,7 +38,7 @@ find :: JSON a => String -> JSValue -> Nullable a
 find k obj = obj .? k
 
 update :: JSON a => String -> a -> JSValue -> JSValue
-update k v (JSObject obj) = object $ fromJSObject obj ++ [k .= v]
+update k v (JSObject obj) = object $ (fromJSObject obj) ++ [k .= v]
 
 instance JSON a => JSON (Nullable a) where
   showJSON (NotNull x) = showJSON x

haskell/manifest/extism-manifest.cabal

@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               extism-manifest
-version:            0.2.0
+version:            0.0.1
 license:            BSD-3-Clause
 maintainer:         oss@extism.org
 author:             Extism authors
@@ -8,14 +8,14 @@ bug-reports:        https://github.com/extism/extism
 synopsis:           Extism manifest bindings
 description:        Bindings to Extism WebAssembly manifest
 category:           Plugins, WebAssembly
-extra-doc-files: CHANGELOG.md
+extra-source-files: CHANGELOG.md
 
 library
     exposed-modules:    Extism.Manifest Extism.JSON
     hs-source-dirs:     .
     default-language:   Haskell2010
     build-depends:
-        base              >= 4.16.1 && < 5,
-        bytestring        >= 0.11.3 && <= 0.12,
-        json              >= 0.10 && <= 0.11,
+        base              >= 4.16.1 && < 4.18.0,
+        bytestring        >= 0.11.3 && < 0.12,
+        json              >= 0.10 && < 0.11,
         base64-bytestring >= 1.2.1 && < 1.3,

haskell/src/Extism.hs

@@ -1,21 +1,10 @@
-module Extism (
-  module Extism,
-  module Extism.Manifest,
-  ValType(..),
-  Val(..)
-) where
-
+module Extism (module Extism, module Extism.Manifest) where
 import Data.Int
 import Data.Word
 import Control.Monad (void)
 import Foreign.ForeignPtr
 import Foreign.C.String
 import Foreign.Ptr
-import Foreign.Marshal.Array
-import Foreign.Storable
-import Foreign.StablePtr
-import Foreign.Concurrent
-import Foreign.Marshal.Utils (copyBytes, moveBytes)
 import Data.ByteString as B
 import Data.ByteString.Internal (c2w, w2c)
 import Data.ByteString.Unsafe (unsafeUseAsCString)
@@ -27,17 +16,8 @@ import Extism.Bindings
 -- | Context for managing plugins
 newtype Context = Context (ForeignPtr ExtismContext)
 
--- | Host function
-data Function = Function (ForeignPtr ExtismFunction) (StablePtr ())
-
 -- | Plugins can be used to call WASM function
-data Plugin = Plugin Context Int32 [Function]
-
--- | Cancellation handle for Plugins
-newtype CancelHandle = CancelHandle (Ptr ExtismCancelHandle)
-
--- | Access the plugin that is currently executing from inside a host function
-type CurrentPlugin = Ptr ExtismCurrentPlugin
+data Plugin = Plugin Context Int32
 
 -- | Log level
 data LogLevel = Error | Warn | Info | Debug | Trace deriving (Show)
@@ -71,94 +51,68 @@ reset (Context ctx) =
 newContext :: IO Context
 newContext = do
   ptr <- extism_context_new
-  fptr <- Foreign.ForeignPtr.newForeignPtr extism_context_free ptr
+  fptr <- newForeignPtr extism_context_free ptr
   return (Context fptr)
-
+ 
 -- | Execute a function with a new 'Context' that is destroyed when it returns
 withContext :: (Context -> IO a) -> IO a
 withContext f = do
   ctx <- newContext
   f ctx
 
--- | Execute a function with the provided 'Plugin' as a parameter, then frees the 'Plugin'
--- | before returning the result.
-withPlugin :: (Plugin -> IO a) -> Plugin -> IO a
-withPlugin f plugin = do
-  res <- f plugin
-  free plugin
-  return res
-
 -- | Create a 'Plugin' from a WASM module, `useWasi` determines if WASI should
 -- | be linked
-plugin :: Context -> B.ByteString -> [Function] -> Bool -> IO (Result Plugin)
-plugin c wasm functions useWasi =
-  let nfunctions = fromIntegral (Prelude.length functions) in
+plugin :: Context -> B.ByteString -> Bool -> IO (Result Plugin)
+plugin c wasm useWasi =
   let length = fromIntegral (B.length wasm) in
   let wasi = fromInteger (if useWasi then 1 else 0) in
   let Context ctx = c in
   do
-    funcs <- Prelude.mapM (\(Function ptr _) -> withForeignPtr ptr (\x -> do return x)) functions
     withForeignPtr ctx (\ctx -> do
       p <- unsafeUseAsCString wasm (\s ->
-        withArray funcs (\funcs ->
-          extism_plugin_new ctx (castPtr s) length funcs nfunctions wasi ))
+        extism_plugin_new ctx (castPtr s) length wasi)
       if p < 0 then do
         err <- extism_error ctx (-1)
         e <- peekCString err
         return $ Left (ExtismError e)
       else
-        return $ Right (Plugin c p functions))
-
--- | Create a 'Plugin' with its own 'Context'
-createPlugin :: B.ByteString -> [Function] -> Bool -> IO (Result Plugin)
-createPlugin c functions useWasi = do
-  ctx <- newContext
-  plugin ctx c functions useWasi
+        return $ Right (Plugin c p))
 
 -- | Create a 'Plugin' from a 'Manifest'
-pluginFromManifest :: Context -> Manifest -> [Function] -> Bool -> IO (Result Plugin)
-pluginFromManifest ctx manifest functions useWasi =
+pluginFromManifest :: Context -> Manifest -> Bool -> IO (Result Plugin)
+pluginFromManifest ctx manifest useWasi =
   let wasm = toByteString $ toString manifest in
-  plugin ctx wasm functions useWasi
-
--- | Create a 'Plugin' with its own 'Context' from a 'Manifest'
-createPluginFromManifest :: Manifest -> [Function] -> Bool -> IO (Result Plugin)
-createPluginFromManifest manifest functions useWasi = do
-  ctx <- newContext
-  pluginFromManifest ctx manifest functions useWasi
+  plugin ctx wasm useWasi
 
 -- | Update a 'Plugin' with a new WASM module
-update :: Plugin -> B.ByteString -> [Function] -> Bool -> IO (Result Plugin)
-update (Plugin (Context ctx) id _) wasm functions useWasi =
-  let nfunctions = fromIntegral (Prelude.length functions) in
+update :: Plugin -> B.ByteString -> Bool -> IO (Result ())
+update (Plugin (Context ctx) id) wasm useWasi =
   let length = fromIntegral (B.length wasm) in
   let wasi = fromInteger (if useWasi then 1 else 0) in
   do
-    funcs <- Prelude.mapM (\(Function ptr _ ) -> withForeignPtr ptr (\x -> do return x)) functions
-    withForeignPtr ctx (\ctx' -> do
+    withForeignPtr ctx (\ctx -> do
       b <- unsafeUseAsCString wasm (\s ->
-        withArray funcs (\funcs ->
-          extism_plugin_update ctx' id (castPtr s) length funcs nfunctions wasi))
+        extism_plugin_update ctx id (castPtr s) length wasi)
       if b <= 0 then do
-        err <- extism_error ctx' (-1)
+        err <- extism_error ctx (-1)
         e <- peekCString err
         return $ Left (ExtismError e)
       else
-        return (Right (Plugin (Context ctx) id functions)))
+        return (Right ()))
 
 -- | Update a 'Plugin' with a new 'Manifest'
-updateManifest :: Plugin -> Manifest -> [Function] -> Bool -> IO (Result Plugin)
-updateManifest plugin manifest functions useWasi =
+updateManifest :: Plugin -> Manifest -> Bool -> IO (Result ())
+updateManifest plugin manifest useWasi =
   let wasm = toByteString $ toString manifest in
-  update plugin wasm functions useWasi
+  update plugin wasm useWasi
 
 -- | Check if a 'Plugin' is valid
 isValid :: Plugin -> Bool
-isValid (Plugin _ p _) = p >= 0
+isValid (Plugin _ p) = p >= 0
 
 -- | Set configuration values for a plugin
 setConfig :: Plugin -> [(String, Maybe String)] -> IO Bool
-setConfig (Plugin (Context ctx) plugin _) x =
+setConfig (Plugin (Context ctx) plugin) x =
   if plugin < 0
     then return False
   else
@@ -187,14 +141,14 @@ setLogFile filename level =
 
 -- | Check if a function exists in the given plugin
 functionExists :: Plugin -> String -> IO Bool
-functionExists (Plugin (Context ctx) plugin _) name = do
+functionExists (Plugin (Context ctx) plugin) name = do
   withForeignPtr ctx (\ctx -> do
     b <- withCString name (extism_plugin_function_exists ctx plugin)
     if b == 1 then return True else return False)
 
 --- | Call a function provided by the given plugin
 call :: Plugin -> String -> B.ByteString -> IO (Result B.ByteString)
-call (Plugin (Context ctx) plugin _) name input =
+call (Plugin (Context ctx) plugin) name input =
   let length = fromIntegral (B.length input) in
   do
     withForeignPtr ctx (\ctx -> do
@@ -216,73 +170,5 @@ call (Plugin (Context ctx) plugin _) name input =
 -- | Free a 'Plugin', this will automatically be called for every plugin
 -- | associated with a 'Context' when that 'Context' is freed
 free :: Plugin -> IO ()
-free (Plugin (Context ctx) plugin _) =
+free (Plugin (Context ctx) plugin) =
   withForeignPtr ctx (`extism_plugin_free` plugin)
-
--- | Create a new 'CancelHandle' that can be used to cancel a running plugin
--- | from another thread.
-cancelHandle :: Plugin -> IO CancelHandle
-cancelHandle (Plugin (Context ctx) plugin _) = do
-  handle <- withForeignPtr ctx (`extism_plugin_cancel_handle` plugin)
-  return (CancelHandle handle)
-
--- | Cancel a running plugin using a 'CancelHandle'
-cancel :: CancelHandle -> IO Bool
-cancel (CancelHandle handle) =
-  extism_plugin_cancel handle
-
-
--- | Create a new 'Function' that can be called from a 'Plugin'
-hostFunction :: String -> [ValType] -> [ValType] -> (CurrentPlugin -> [Val] -> a -> IO [Val]) -> a -> IO Function
-hostFunction name params results f v =
-  let nparams = fromIntegral $ Prelude.length params in
-  let nresults = fromIntegral $ Prelude.length results in
-  do
-    cb <- callbackWrap (callback f :: CCallback)
-    free <- freePtrWrap freePtr
-    userData <- newStablePtr (v, free, cb)
-    let userDataPtr = castStablePtrToPtr userData
-    x <- withCString name (\name ->  do
-      withArray params (\params ->
-        withArray results (\results -> do
-          extism_function_new name params nparams results nresults cb userDataPtr free)))
-    let freeFn = extism_function_free x
-    fptr <- Foreign.Concurrent.newForeignPtr x freeFn
-    return $ Function fptr (castPtrToStablePtr userDataPtr)
-
-
--- | Create a new I32 'Val'
-toI32 :: Integral a => a -> Val
-toI32 x = ValI32 (fromIntegral x)
-
--- | Create a new I64 'Val'
-toI64 :: Integral a => a -> Val
-toI64 x = ValI64 (fromIntegral x)
-
--- | Create a new F32 'Val'
-toF32 :: Float -> Val
-toF32 = ValF32
-
--- | Create a new F64 'Val'
-toF64 :: Double -> Val
-toF64 = ValF64
-
--- | Get I32 'Val'
-fromI32 :: Integral a => Val -> Maybe a
-fromI32 (ValI32 x) = Just (fromIntegral x)
-fromI32 _ = Nothing
-
--- | Get I64 'Val'
-fromI64 :: Integral a => Val -> Maybe a
-fromI64 (ValI64 x) = Just (fromIntegral x)
-fromI64 _ = Nothing
-
--- | Get F32 'Val'
-fromF32 :: Val -> Maybe Float
-fromF32 (ValF32 x) = Just x
-fromF32 _ = Nothing
-
--- | Get F64 'Val'
-fromF64 :: Val -> Maybe Double
-fromF64 (ValF64 x) = Just x
-fromF64 _ = Nothing

haskell/src/Extism/Bindings.hs

@@ -7,116 +7,20 @@ import Foreign.Ptr
 import Foreign.C.String
 import Data.Int
 import Data.Word
-import Foreign.Storable
-import Foreign.Marshal.Array
-import Foreign.StablePtr
-
-type FreeCallback = Ptr () -> IO ()
 
 newtype ExtismContext = ExtismContext () deriving Show
-newtype ExtismFunction = ExtismFunction () deriving Show
-newtype ExtismCancelHandle = ExtismCancelHandle () deriving Show
-newtype ExtismCurrentPlugin = ExtismCurrentPlugin () deriving Show
-data ValType = I32 | I64 | F32 | F64 | V128 | FuncRef | ExternRef deriving (Show, Eq)
-data Val = ValI32 Int32 | ValI64 Int64 | ValF32 Float | ValF64 Double deriving (Show, Eq)
 
-typeOfVal (ValI32 _) = I32
-typeOfVal (ValI64 _) = I64
-typeOfVal (ValF32 _) = F32
-typeOfVal (ValF64 _) = F64
-
-type CCallback = Ptr ExtismCurrentPlugin -> Ptr Val -> Word64 -> Ptr Val -> Word64 -> Ptr () -> IO ()
-
-_32Bit = sizeOf (undefined :: Int) == 4
-
-instance Storable Val where
-  sizeOf _ =
-    if _32Bit then 12 else 16
-  alignment _ = 1
-  peek ptr = do
-    let offs = if _32Bit then 4 else 8
-    t <- valTypeOfInt <$> peekByteOff ptr 0
-    case t of
-      I32 -> ValI32 <$> peekByteOff ptr offs
-      I64 -> ValI64 <$> peekByteOff ptr offs
-      F32 -> ValF32 <$> peekByteOff ptr offs
-      F64 -> ValF64 <$> peekByteOff ptr offs
-  poke ptr x = do
-    let offs = if _32Bit then 4 else 8
-    pokeByteOff ptr 0 (typeOfVal x)
-    case x of
-      ValI32 x -> pokeByteOff ptr offs x
-      ValI64 x -> pokeByteOff ptr offs x
-      ValF32 x -> pokeByteOff ptr offs x
-      ValF64 x -> pokeByteOff ptr offs x
-
-
-intOfValType :: ValType -> CInt
-intOfValType I32 = 0
-intOfValType I64 = 1
-intOfValType F32 = 2
-intOfValType F64 = 3
-intOfValType V128 = 4
-intOfValType FuncRef = 5
-intOfValType ExternRef = 6
-
-valTypeOfInt :: CInt -> ValType
-valTypeOfInt 0 = I32
-valTypeOfInt 1 = I64
-valTypeOfInt 2 = F32
-valTypeOfInt 3 = F64
-valTypeOfInt 4 = V128
-valTypeOfInt 5 = FuncRef
-valTypeOfInt 6 = ExternRef
-valTypeOfInt _ = error "Invalid ValType"
-
-instance Storable ValType where
-  sizeOf _ = 4
-  alignment _ = 1
-  peek ptr = do
-    x <- peekByteOff ptr 0
-    return $ valTypeOfInt (x :: CInt)
-  poke ptr x = do
-    pokeByteOff ptr 0 (intOfValType x)
-
-foreign import ccall safe "extism.h extism_context_new" extism_context_new :: IO (Ptr ExtismContext)
-foreign import ccall safe "extism.h &extism_context_free" extism_context_free :: FunPtr (Ptr ExtismContext -> IO ())
-foreign import ccall safe "extism.h extism_plugin_new" extism_plugin_new :: Ptr ExtismContext -> Ptr Word8 -> Word64 -> Ptr (Ptr ExtismFunction) -> Word64 -> CBool -> IO Int32
-foreign import ccall safe "extism.h extism_plugin_update" extism_plugin_update :: Ptr ExtismContext -> Int32 -> Ptr Word8 -> Word64 -> Ptr (Ptr ExtismFunction) -> Word64 -> CBool -> IO CBool
-foreign import ccall safe "extism.h extism_plugin_call" extism_plugin_call :: Ptr ExtismContext -> Int32 -> CString -> Ptr Word8 -> Word64 -> IO Int32
-foreign import ccall safe "extism.h extism_plugin_function_exists" extism_plugin_function_exists :: Ptr ExtismContext -> Int32 -> CString -> IO CBool
-foreign import ccall safe "extism.h extism_error" extism_error :: Ptr ExtismContext -> Int32 -> IO CString
-foreign import ccall safe "extism.h extism_plugin_output_length" extism_plugin_output_length :: Ptr ExtismContext -> Int32 -> IO Word64
-foreign import ccall safe "extism.h extism_plugin_output_data" extism_plugin_output_data :: Ptr ExtismContext -> Int32 -> IO (Ptr Word8)
-foreign import ccall safe "extism.h extism_log_file" extism_log_file :: CString -> CString -> IO CBool
-foreign import ccall safe "extism.h extism_plugin_config" extism_plugin_config :: Ptr ExtismContext -> Int32 -> Ptr Word8 -> Int64 -> IO CBool
-foreign import ccall safe "extism.h extism_plugin_free" extism_plugin_free :: Ptr ExtismContext -> Int32 -> IO ()
-foreign import ccall safe "extism.h extism_context_reset" extism_context_reset :: Ptr ExtismContext -> IO ()
-foreign import ccall safe "extism.h extism_version" extism_version :: IO CString
-foreign import ccall safe "extism.h extism_plugin_cancel_handle" extism_plugin_cancel_handle :: Ptr ExtismContext -> Int32 -> IO (Ptr ExtismCancelHandle)
-foreign import ccall safe "extism.h extism_plugin_cancel" extism_plugin_cancel :: Ptr ExtismCancelHandle -> IO Bool
-
-foreign import ccall safe "extism.h extism_function_new" extism_function_new :: CString -> Ptr ValType -> Word64 -> Ptr ValType -> Word64 -> FunPtr CCallback -> Ptr () -> FunPtr FreeCallback -> IO (Ptr ExtismFunction)
-foreign import ccall safe "extism.h extism_function_free" extism_function_free :: Ptr ExtismFunction -> IO ()
-foreign import ccall safe "extism.h extism_current_plugin_memory" extism_current_plugin_memory :: Ptr ExtismCurrentPlugin -> IO (Ptr Word8)
-foreign import ccall safe "extism.h extism_current_plugin_memory_alloc" extism_current_plugin_memory_alloc :: Ptr ExtismCurrentPlugin -> Word64 -> IO Word64
-foreign import ccall safe "extism.h extism_current_plugin_memory_length" extism_current_plugin_memory_length :: Ptr ExtismCurrentPlugin -> Word64 -> IO Word64
-foreign import ccall safe "extism.h extism_current_plugin_memory_free" extism_current_plugin_memory_free :: Ptr ExtismCurrentPlugin -> Word64 -> IO ()
-
-freePtr ptr = do
-  let s = castPtrToStablePtr ptr
-  (a, b, c) <- deRefStablePtr s
-  freeHaskellFunPtr b
-  freeHaskellFunPtr c
-  freeStablePtr s
-
-foreign import ccall "wrapper" freePtrWrap :: FreeCallback -> IO (FunPtr FreeCallback)
-
-foreign import ccall "wrapper" callbackWrap :: CCallback -> IO (FunPtr CCallback)
-
-callback :: (Ptr ExtismCurrentPlugin -> [Val] -> a -> IO [Val]) -> (Ptr ExtismCurrentPlugin -> Ptr Val -> Word64 -> Ptr Val -> Word64 -> Ptr () -> IO ())
-callback f plugin params nparams results nresults ptr = do
-    p <- peekArray (fromIntegral nparams) params
-    (userData, _, _)  <- deRefStablePtr (castPtrToStablePtr ptr)
-    res <- f plugin p userData
-    pokeArray results res
+foreign import ccall unsafe "extism.h extism_context_new" extism_context_new :: IO (Ptr ExtismContext)
+foreign import ccall unsafe "extism.h &extism_context_free" extism_context_free :: FunPtr (Ptr ExtismContext -> IO ())
+foreign import ccall unsafe "extism.h extism_plugin_new" extism_plugin_new :: Ptr ExtismContext -> Ptr Word8 -> Word64 -> CBool -> IO Int32
+foreign import ccall unsafe "extism.h extism_plugin_update" extism_plugin_update :: Ptr ExtismContext -> Int32 -> Ptr Word8 -> Word64 -> CBool -> IO CBool
+foreign import ccall unsafe "extism.h extism_plugin_call" extism_plugin_call :: Ptr ExtismContext -> Int32 -> CString -> Ptr Word8 -> Word64 -> IO Int32
+foreign import ccall unsafe "extism.h extism_plugin_function_exists" extism_plugin_function_exists :: Ptr ExtismContext -> Int32 -> CString -> IO CBool
+foreign import ccall unsafe "extism.h extism_error" extism_error :: Ptr ExtismContext -> Int32 -> IO CString
+foreign import ccall unsafe "extism.h extism_plugin_output_length" extism_plugin_output_length :: Ptr ExtismContext -> Int32 -> IO Word64
+foreign import ccall unsafe "extism.h extism_plugin_output_data" extism_plugin_output_data :: Ptr ExtismContext -> Int32 -> IO (Ptr Word8)
+foreign import ccall unsafe "extism.h extism_log_file" extism_log_file :: CString -> CString -> IO CBool
+foreign import ccall unsafe "extism.h extism_plugin_config" extism_plugin_config :: Ptr ExtismContext -> Int32 -> Ptr Word8 -> Int64 -> IO CBool
+foreign import ccall unsafe "extism.h extism_plugin_free" extism_plugin_free :: Ptr ExtismContext -> Int32 -> IO ()
+foreign import ccall unsafe "extism.h extism_context_reset" extism_context_reset :: Ptr ExtismContext -> IO ()
+foreign import ccall unsafe "extism.h extism_version" extism_version :: IO CString

haskell/src/Extism/CurrentPlugin.hs

@@ -1,48 +0,0 @@
-module Extism.CurrentPlugin where
-
-import Extism
-import Extism.Bindings
-import Data.Word
-import Data.ByteString as B
-import Foreign.Ptr
-import Foreign.Marshal.Array
-
--- | Allocate a new handle of the given size
-memoryAlloc :: CurrentPlugin -> Word64 -> IO Word64
-memoryAlloc = extism_current_plugin_memory_alloc
-
--- | Get the length of a handle, returns 0 if the handle is invalid
-memoryLength :: CurrentPlugin -> Word64 -> IO Word64
-memoryLength = extism_current_plugin_memory_length
-
--- | Free allocated memory
-memoryFree :: CurrentPlugin -> Word64 -> IO ()
-memoryFree = extism_current_plugin_memory_free
-
--- | Access a pointer to the entire memory region
-memory :: CurrentPlugin -> IO (Ptr Word8)
-memory = extism_current_plugin_memory
-
--- | Access a pointer the a specific offset in memory
-memoryOffset :: CurrentPlugin -> Word64 -> IO (Ptr Word8)
-memoryOffset plugin offs = do
-  x <- extism_current_plugin_memory plugin
-  return $ plusPtr x (fromIntegral offs)
-
--- | Access the data associated with a handle as a 'ByteString'
-memoryBytes :: CurrentPlugin -> Word64 ->  IO B.ByteString
-memoryBytes plugin offs = do
-  ptr <- memoryOffset plugin offs
-  len <- memoryLength plugin offs
-  arr <- peekArray (fromIntegral len) ptr
-  return $ B.pack arr
-
--- | Allocate memory and copy an existing 'ByteString' into it
-allocBytes :: CurrentPlugin -> B.ByteString -> IO Word64
-allocBytes plugin s = do
-  let length = B.length s
-  offs <- memoryAlloc plugin (fromIntegral length)
-  ptr <- memoryOffset plugin offs
-  pokeArray ptr (B.unpack s)
-  return offs
-

haskell/test/Test.hs

@@ -1,66 +1,53 @@
 import Test.HUnit
 import Extism
 import Extism.Manifest
-import Extism.CurrentPlugin
 
 
 unwrap (Right x) = return x
 unwrap (Left (ExtismError msg)) =
   assertFailure msg
 
-defaultManifest = manifest [wasmFile "../../wasm/code.wasm"]
-hostFunctionManifest = manifest [wasmFile "../../wasm/code-functions.wasm"]
+defaultManifest = manifest [wasmFile "test/code.wasm"]
 
-initPlugin :: Maybe Context -> IO Plugin
-initPlugin Nothing =
-  Extism.createPluginFromManifest defaultManifest [] False >>= unwrap
-initPlugin (Just ctx) =
-  Extism.pluginFromManifest ctx defaultManifest [] False >>= unwrap
+initPlugin :: Context -> IO Plugin
+initPlugin context =
+  Extism.pluginFromManifest context defaultManifest False >>= unwrap
 
 pluginFunctionExists = do
-  p <- initPlugin Nothing
-  exists <- functionExists p "count_vowels"
-  assertBool "function exists" exists
-  exists' <- functionExists p "function_doesnt_exist"
-  assertBool "function doesn't exist" (not exists')
+  withContext (\ctx -> do
+    p <- initPlugin ctx
+    exists <- functionExists p "count_vowels"
+    assertBool "function exists" exists
+    exists' <- functionExists p "function_doesnt_exist"
+    assertBool "function doesn't exist" (not exists'))
 
 checkCallResult p = do
-  res <- call p "count_vowels" (toByteString "this is a test") >>= unwrap
-  assertEqual "count vowels output" "{\"count\": 4}" (fromByteString res)
+    res <- call p "count_vowels" (toByteString "this is a test") >>= unwrap
+    assertEqual "count vowels output" "{\"count\": 4}" (fromByteString res)
 
 pluginCall = do
-  p <- initPlugin Nothing
-  checkCallResult p
-
-
-hello plugin params () = do
-  putStrLn "Hello from Haskell!"
-  offs <- allocBytes plugin (toByteString "{\"count\": 999}")
-  return [toI64 offs]
-
-pluginCallHostFunction = do
-  p <- Extism.createPluginFromManifest hostFunctionManifest [] False >>= unwrap
-  res <- call p "count_vowels" (toByteString "this is a test") >>= unwrap
-  assertEqual "count vowels output" "{\"count\": 999}" (fromByteString res)
+  withContext (\ctx -> do
+    p <- initPlugin ctx
+    checkCallResult p)
 
 pluginMultiple = do
-  withContext(\ctx -> do
-    p <- initPlugin (Just ctx)
+  withContext (\ctx -> do
+    p <- initPlugin ctx
     checkCallResult p
-    q <- initPlugin (Just ctx)
-    r <- initPlugin (Just ctx)
+    q <- initPlugin ctx
+    r <- initPlugin ctx
     checkCallResult q
     checkCallResult r)
 
 pluginUpdate = do
   withContext (\ctx -> do
-    p <- initPlugin (Just ctx)
-    updateManifest p defaultManifest [] True >>= unwrap
+    p <- initPlugin ctx
+    updateManifest p defaultManifest True >>= unwrap
     checkCallResult p)
 
 pluginConfig = do
   withContext (\ctx -> do
-    p <- initPlugin (Just ctx)
+    p <- initPlugin ctx
     b <- setConfig p [("a", Just "1"), ("b", Just "2"), ("c", Just "3"), ("d", Nothing)]
     assertBool "set config" b)
 
@@ -75,7 +62,6 @@ main = do
     [
       t "Plugin.FunctionExists" pluginFunctionExists
       , t "Plugin.Call" pluginCall
-      , t "Plugin.CallHostFunction" pluginCallHostFunction
       , t "Plugin.Multiple" pluginMultiple
       , t "Plugin.Update" pluginUpdate
       , t "Plugin.Config" pluginConfig

java/pom.xml

@@ -4,7 +4,7 @@
     <groupId>org.extism.sdk</groupId>
     <artifactId>extism</artifactId>
     <packaging>jar</packaging>
-    <version>0.4.0</version>
+    <version>0.1.0</version>
     <name>extism</name>
     <url>https://github.com/extism/extism</url>
     <description>Java-SDK for Extism to use webassembly from Java</description>
@@ -36,7 +36,7 @@
     <scm>
         <connection>scm:git:git://github.com/extism/extism.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/extism/extism.git</developerConnection>
-        <url>https://github.com/extism/extism/tree/main/java</url>
+        <url>https://github.com/extism/extism/java</url>
         <tag>main</tag>
     </scm>
 
@@ -46,7 +46,7 @@
     </issueManagement>
 
     <properties>
-        <java.version>11</java.version>
+        <java.version>17</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <!-- dependencies -->
@@ -74,9 +74,6 @@
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-javadoc-plugin</artifactId>
               <version>3.4.1</version>
-              <configuration>
-               <additionalJOption>-Xdoclint:none</additionalJOption>
-              </configuration>
               <executions>
                 <execution>
                   <id>attach-javadoc</id>

java/src/main/java/org/extism/sdk/CancelHandle.java

@@ -1,21 +0,0 @@
-package org.extism.sdk;
-
-import com.sun.jna.Pointer;
-
-/**
- * CancelHandle is used to cancel a running Plugin
- */
-public class CancelHandle {
-    private Pointer handle;
-
-    public CancelHandle(Pointer handle) {
-        this.handle = handle;
-    }
-
-    /**
-     * Cancel execution of the Plugin associated with the CancelHandle
-     */
-    boolean cancel() {
-        return LibExtism.INSTANCE.extism_plugin_cancel(this.handle);
-    }
-}

java/src/main/java/org/extism/sdk/Context.java

@@ -28,11 +28,10 @@ public class Context implements AutoCloseable {
      *
      * @param manifest The manifest for the plugin
      * @param withWASI Set to true to enable WASI
-     * @param functions List of Host functions
      * @return the plugin instance
      */
-    public Plugin newPlugin(Manifest manifest, boolean withWASI, HostFunction[] functions) {
-        return new Plugin(this, manifest, withWASI, functions);
+    public Plugin newPlugin(Manifest manifest, boolean withWASI) {
+        return new Plugin(this, manifest, withWASI);
     }
 
     /**

java/src/main/java/org/extism/sdk/Extism.java

@@ -42,7 +42,7 @@ public class Extism {
      */
     public static String invokeFunction(Manifest manifest, String function, String input) throws ExtismException {
         try (var ctx = new Context()) {
-            try (var plugin = ctx.newPlugin(manifest, false, null)) {
+            try (var plugin = ctx.newPlugin(manifest, false)) {
                 return plugin.call(function, input);
             }
         }

java/src/main/java/org/extism/sdk/ExtismCurrentPlugin.java

@@ -1,78 +0,0 @@
-package org.extism.sdk;
-
-import com.sun.jna.Pointer;
-
-import java.nio.charset.StandardCharsets;
-
-public class ExtismCurrentPlugin {
-    public Pointer pointer;
-
-    public ExtismCurrentPlugin(Pointer pointer) {
-        this.pointer = pointer;
-    }
-
-    public Pointer memory() {
-        return LibExtism.INSTANCE.extism_current_plugin_memory(this.pointer);
-    }
-
-    public int alloc(int n) {
-        return LibExtism.INSTANCE.extism_current_plugin_memory_alloc(this.pointer, n);
-    }
-
-    public void free(long offset) {
-        LibExtism.INSTANCE.extism_current_plugin_memory_free(this.pointer, offset);
-    }
-
-    public long memoryLength(long offset) {
-        return LibExtism.INSTANCE.extism_current_plugin_memory_length(this.pointer, offset);
-    }
-
-    /**
-     * Return a string from a host function
-     * @param output - The output to set
-     * @param s - The string to return
-     */
-    public void returnString(LibExtism.ExtismVal output, String s) {
-        returnBytes(output, s.getBytes(StandardCharsets.UTF_8));
-    }
-
-    /**
-     * Return bytes from a host function
-     * @param output - The output to set
-     * @param b - The buffer to return
-     */
-    public void returnBytes(LibExtism.ExtismVal output, byte[] b) {
-        int offs = this.alloc(b.length);
-        Pointer ptr = this.memory();
-        ptr.write(offs, b, 0, b.length);
-        output.v.i64 = offs;
-    }
-
-    /**
-     * Get bytes from host function parameter
-     * @param input - The input to read
-     */
-    public byte[] inputBytes(LibExtism.ExtismVal input) {
-        switch (input.t) {
-            case 0:
-                return this.memory()
-                        .getByteArray(input.v.i32,
-                                LibExtism.INSTANCE.extism_current_plugin_memory_length(this.pointer, input.v.i32));
-            case 1:
-                return this.memory()
-                        .getByteArray(input.v.i64,
-                                LibExtism.INSTANCE.extism_current_plugin_memory_length(this.pointer, input.v.i64));
-            default:
-                throw new ExtismException("inputBytes error: ExtismValType " + LibExtism.ExtismValType.values()[input.t] + " not implemtented");
-        }
-    }
-
-
-    /**
-     * Get string from host function parameter
-     * @param input - The input to read
-     */
-    public String inputString(LibExtism.ExtismVal input) {
-        return new String(this.inputBytes(input));
-    }
-}

java/src/main/java/org/extism/sdk/ExtismFunction.java

@@ -1,12 +0,0 @@
-package org.extism.sdk;
-
-import java.util.Optional;
-
-public interface ExtismFunction<T extends HostUserData> {
-    void invoke(
-            ExtismCurrentPlugin plugin,
-            LibExtism.ExtismVal[] params,
-            LibExtism.ExtismVal[] returns,
-            Optional<T> data
-    );
-}

java/src/main/java/org/extism/sdk/HostFunction.java

@@ -1,92 +0,0 @@
-package org.extism.sdk;
-
-import com.sun.jna.Pointer;
-import com.sun.jna.PointerType;
-
-import java.util.Arrays;
-import java.util.Optional;
-
-public class HostFunction<T extends HostUserData> {
-
-    private final LibExtism.InternalExtismFunction callback;
-
-    public final Pointer pointer;
-
-    public final String name;
-
-    public final LibExtism.ExtismValType[] params;
-
-    public final LibExtism.ExtismValType[] returns;
-
-    public final Optional<T> userData;
-
-    public HostFunction(String name, LibExtism.ExtismValType[] params, LibExtism.ExtismValType[] returns, ExtismFunction f, Optional<T> userData) {
-
-        this.name = name;
-        this.params = params;
-        this.returns = returns;
-        this.userData = userData;
-        this.callback = (Pointer currentPlugin,
-                         LibExtism.ExtismVal inputs,
-                         int nInputs,
-                         LibExtism.ExtismVal outs,
-                         int nOutputs,
-                         Pointer data) -> {
-
-            LibExtism.ExtismVal[] outputs = (LibExtism.ExtismVal []) outs.toArray(nOutputs);
-
-            f.invoke(
-                    new ExtismCurrentPlugin(currentPlugin),
-                    (LibExtism.ExtismVal []) inputs.toArray(nInputs),
-                    outputs,
-                    userData
-            );
-
-            for (LibExtism.ExtismVal output : outputs) {
-                convertOutput(output, output);
-            }
-        };
-
-        this.pointer = LibExtism.INSTANCE.extism_function_new(
-                this.name,
-                Arrays.stream(this.params).mapToInt(r -> r.v).toArray(),
-                this.params.length,
-                Arrays.stream(this.returns).mapToInt(r -> r.v).toArray(),
-                this.returns.length,
-                this.callback,
-                userData.map(PointerType::getPointer).orElse(null),
-                null
-        );
-    }
-
-    void convertOutput(LibExtism.ExtismVal original, LibExtism.ExtismVal fromHostFunction) {
-        if (fromHostFunction.t != original.t)
-            throw new ExtismException(String.format("Output type mismatch, got %d but expected %d", fromHostFunction.t, original.t));
-
-        if (fromHostFunction.t == LibExtism.ExtismValType.I32.v) {
-            original.v.setType(Integer.TYPE);
-            original.v.i32 = fromHostFunction.v.i32;
-        } else if (fromHostFunction.t == LibExtism.ExtismValType.I64.v) {
-            original.v.setType(Long.TYPE);
-            original.v.i64 = fromHostFunction.v.i64;
-        } else if (fromHostFunction.t == LibExtism.ExtismValType.F32.v) {
-            original.v.setType(Float.TYPE);
-            original.v.f32 = fromHostFunction.v.f32;
-        } else if (fromHostFunction.t == LibExtism.ExtismValType.F64.v) {
-            original.v.setType(Double.TYPE);
-            original.v.f64 = fromHostFunction.v.f64;
-        } else
-            throw new ExtismException(String.format("Unsupported return type: %s", original.t));
-    }
-
-    public void setNamespace(String name) {
-        if (this.pointer != null) {
-            LibExtism.INSTANCE.extism_function_set_namespace(this.pointer, name);
-        }
-    }
-
-    HostFunction withNamespace(String name) {
-        this.setNamespace(name);
-        return this;
-    }
-}

java/src/main/java/org/extism/sdk/HostUserData.java

@@ -1,7 +0,0 @@
-package org.extism.sdk;
-
-import com.sun.jna.PointerType;
-
-public class HostUserData extends PointerType {
-
-}

java/src/main/java/org/extism/sdk/LibExtism.java

@@ -1,6 +1,8 @@
 package org.extism.sdk;
 
-import com.sun.jna.*;
+import com.sun.jna.Library;
+import com.sun.jna.Native;
+import com.sun.jna.Pointer;
 
 /**
  * Wrapper around the Extism library.
@@ -13,80 +15,7 @@ public interface LibExtism extends Library {
      */
     LibExtism INSTANCE = Native.load("extism", LibExtism.class);
 
-    interface InternalExtismFunction extends Callback {
-        void invoke(
-                Pointer currentPlugin,
-                ExtismVal inputs,
-                int nInputs,
-                ExtismVal outputs,
-                int nOutputs,
-                Pointer data
-        );
-    }
-
-    @Structure.FieldOrder({"t", "v"})
-    class ExtismVal extends Structure {
-        public int t;
-        public ExtismValUnion v;
-    }
-
-    class ExtismValUnion extends Union {
-        public int i32;
-        public long i64;
-        public float f32;
-        public double f64;
-    }
-
-    enum ExtismValType {
-        I32(0),
-        I64(1),
-        F32(2),
-        F64(3),
-        V128(4),
-        FuncRef(5),
-        ExternRef(6);
-
-        public final int v;
-
-        ExtismValType(int value) {
-            this.v = value;
-        }
-    }
-
-    Pointer extism_function_new(String name,
-                                int[] inputs,
-                                int nInputs,
-                                int[] outputs,
-                                int nOutputs,
-                                InternalExtismFunction func,
-                                Pointer userData,
-                                Pointer freeUserData);
-
     /**
-     * Get the length of an allocated block
-     * NOTE: this should only be called from host functions.
-     */
-    int extism_current_plugin_memory_length(Pointer plugin, long n);
-
-    /**
-     * Returns a pointer to the memory of the currently running plugin
-     * NOTE: this should only be called from host functions.
-     */
-    Pointer extism_current_plugin_memory(Pointer plugin);
-
-    /**
-     * Allocate a memory block in the currently running plugin
-     * NOTE: this should only be called from host functions.
-     */
-    int extism_current_plugin_memory_alloc(Pointer plugin, long n);
-
-    /**
-     * Free an allocated memory block
-     * NOTE: this should only be called from host functions.
-     */
-    void extism_current_plugin_memory_free(Pointer plugin, long ptr);
-
-        /**
      * Create a new context
      */
     Pointer extism_context_new();
@@ -127,18 +56,27 @@ public interface LibExtism extends Library {
      * @param contextPointer pointer to the {@link Context}.
      * @param wasm           is a WASM module (wat or wasm) or a JSON encoded manifest
      * @param wasmSize       the length of the `wasm` parameter
-     * @param functions      host functions
-     * @param nFunctions     the number of host functions
      * @param withWASI       enables/disables WASI
      * @return id of the plugin or {@literal -1} in case of error
      */
-    int extism_plugin_new(Pointer contextPointer, byte[] wasm, long wasmSize, Pointer[] functions, int nFunctions, boolean withWASI);
+    int extism_plugin_new(long contextPointer, byte[] wasm, long wasmSize, boolean withWASI);
 
     /**
      * Returns the Extism version string
      */
     String extism_version();
 
+    /**
+     * Create a new plugin.
+     *
+     * @param contextPointer pointer to the {@link Context}.
+     * @param wasm           is a WASM module (wat or wasm) or a JSON encoded manifest
+     * @param length         the length of the `wasm` parameter
+     * @param withWASI       enables/disables WASI
+     * @return id of the plugin or {@literal -1} in case of error
+     * @see #extism_plugin_new(long, byte[], long, boolean)
+     */
+    int extism_plugin_new(Pointer contextPointer, byte[] wasm, int length, boolean withWASI);
 
     /**
      * Calls a function from the @{@link Plugin} at the given {@code pluginIndex}.
@@ -172,19 +110,17 @@ public interface LibExtism extends Library {
 
     /**
      * Update a plugin, keeping the existing ID.
-     * Similar to {@link #extism_plugin_new(Pointer, byte[], long, Pointer[], int, boolean)} but takes an {@code pluginIndex} argument to specify which plugin to update.
+     * Similar to {@link #extism_plugin_new(long, byte[], long, boolean)} but takes an {@code pluginIndex} argument to specify which plugin to update.
      * Note: Memory for this plugin will be reset upon update.
      *
      * @param contextPointer
      * @param pluginIndex
      * @param wasm
      * @param length
-     * @param functions      host functions
-     * @param nFunctions     the number of host functions
      * @param withWASI
      * @return {@literal true} if update was successful
      */
-    boolean extism_plugin_update(Pointer contextPointer, int pluginIndex, byte[] wasm, int length, Pointer[] functions, int nFunctions, boolean withWASI);
+    boolean extism_plugin_update(Pointer contextPointer, int pluginIndex, byte[] wasm, int length, boolean withWASI);
 
     /**
      * Remove a plugin from the registry and free associated memory.
@@ -204,7 +140,4 @@ public interface LibExtism extends Library {
      * @return {@literal true} if update was successful
      */
     boolean extism_plugin_config(Pointer contextPointer, int pluginIndex, byte[] json, int jsonLength);
-    Pointer extism_plugin_cancel_handle(Pointer contextPointer, int n);
-    boolean extism_plugin_cancel(Pointer contextPointer);
-    void extism_function_set_namespace(Pointer p, String name);
 }

java/src/main/java/org/extism/sdk/Plugin.java

@@ -28,27 +28,15 @@ public class Plugin implements AutoCloseable {
      *
      * @param context       The context to manage the plugin
      * @param manifestBytes The manifest for the plugin
-     * @param functions     The Host functions for th eplugin
      * @param withWASI      Set to true to enable WASI
      */
-    public Plugin(Context context, byte[] manifestBytes, boolean withWASI, HostFunction[] functions) {
+    public Plugin(Context context, byte[] manifestBytes, boolean withWASI) {
 
         Objects.requireNonNull(context, "context");
         Objects.requireNonNull(manifestBytes, "manifestBytes");
 
-        Pointer[] ptrArr = new Pointer[functions == null ? 0 : functions.length];
-
-        if (functions != null)
-            for (int i = 0; i < functions.length; i++) {
-               ptrArr[i] = functions[i].pointer;
-            }
-
         Pointer contextPointer = context.getPointer();
-
-        int index = LibExtism.INSTANCE.extism_plugin_new(contextPointer, manifestBytes, manifestBytes.length,
-                ptrArr,
-                functions == null ? 0 : functions.length,
-                withWASI);
+        int index = LibExtism.INSTANCE.extism_plugin_new(contextPointer, manifestBytes, manifestBytes.length, withWASI);
         if (index == -1) {
             String error = context.error(this);
             throw new ExtismException(error);
@@ -58,18 +46,8 @@ public class Plugin implements AutoCloseable {
         this.context = context;
     }
 
-    public Plugin(Context context, Manifest manifest, boolean withWASI, HostFunction[] functions) {
-        this(context, serialize(manifest), withWASI, functions);
-    }
-
-
-    public Plugin(byte[] manifestBytes, boolean withWASI, HostFunction[] functions) {
-        this(new Context(), manifestBytes, withWASI, functions);
-    }
-
-    
-    public Plugin(Manifest manifest, boolean withWASI, HostFunction[] functions) {
-        this(new Context(), serialize(manifest), withWASI, functions);
+    public Plugin(Context context, Manifest manifest, boolean withWASI) {
+        this(context, serialize(manifest), withWASI);
     }
 
     private static byte[] serialize(Manifest manifest) {
@@ -134,8 +112,8 @@ public class Plugin implements AutoCloseable {
      * @param withWASI Set to true to enable WASI
      * @return {@literal true} if update was successful
      */
-    public boolean update(Manifest manifest, boolean withWASI, HostFunction[] functions) {
-        return update(serialize(manifest), withWASI, functions);
+    public boolean update(Manifest manifest, boolean withWASI) {
+        return update(serialize(manifest), withWASI);
     }
 
     /**
@@ -145,19 +123,9 @@ public class Plugin implements AutoCloseable {
      * @param withWASI      Set to true to enable WASI
      * @return {@literal true} if update was successful
      */
-    public boolean update(byte[] manifestBytes, boolean withWASI, HostFunction[] functions) {
+    public boolean update(byte[] manifestBytes, boolean withWASI) {
         Objects.requireNonNull(manifestBytes, "manifestBytes");
-        Pointer[] ptrArr = new Pointer[functions == null ? 0 : functions.length];
-
-        if (functions != null)
-            for (int i = 0; i < functions.length; i++) {
-                ptrArr[i] = functions[i].pointer;
-            }
-
-        return LibExtism.INSTANCE.extism_plugin_update(context.getPointer(), index, manifestBytes, manifestBytes.length,
-                ptrArr,
-                functions == null ? 0 : functions.length,
-                withWASI);
+        return LibExtism.INSTANCE.extism_plugin_update(context.getPointer(), index, manifestBytes, manifestBytes.length, withWASI);
     }
 
     /**
@@ -197,15 +165,4 @@ public class Plugin implements AutoCloseable {
     public void close() {
         free();
     }
-
-    /**
-     * Return a new `CancelHandle`, which can be used to cancel a running Plugin
-     */
-    public CancelHandle cancelHandle() {
-        if (this.context.getPointer() == null) {
-            throw new ExtismException("No Context set");
-        }
-        Pointer handle = LibExtism.INSTANCE.extism_plugin_cancel_handle(this.context.getPointer(), this.index);
-        return new CancelHandle(handle);
-    }
 }

java/src/main/java/org/extism/sdk/manifest/Manifest.java

@@ -20,14 +20,11 @@ public class Manifest {
     @SerializedName("allowed_hosts")
     private final List<String> allowedHosts;
 
-    @SerializedName("allowed_paths")
-    private final Map<String, String> allowedPaths;
-
     @SerializedName("config")
     private final Map<String, String> config;
 
     public Manifest() {
-        this(new ArrayList<>(), null, null, null, null);
+        this(new ArrayList<>(), null, null, null);
     }
 
     public Manifest(WasmSource source) {
@@ -35,27 +32,22 @@ public class Manifest {
     }
 
     public Manifest(List<WasmSource> sources) {
-        this(sources, null, null, null, null);
+        this(sources, null, null, null);
     }
 
     public Manifest(List<WasmSource> sources, MemoryOptions memoryOptions) {
-        this(sources, memoryOptions, null, null, null);
+        this(sources, memoryOptions, null, null);
     }
 
     public Manifest(List<WasmSource> sources, MemoryOptions memoryOptions, Map<String, String> config) {
-        this(sources, memoryOptions, config, null, null);
+        this(sources, memoryOptions, config, null);
     }
 
     public Manifest(List<WasmSource> sources, MemoryOptions memoryOptions, Map<String, String> config, List<String> allowedHosts) {
-        this(sources, memoryOptions, config, allowedHosts, null);
-    }
-
-    public Manifest(List<WasmSource> sources, MemoryOptions memoryOptions, Map<String, String> config, List<String> allowedHosts, Map<String, String> allowedPaths) {
         this.sources = sources;
         this.memoryOptions = memoryOptions;
         this.config = config;
         this.allowedHosts = allowedHosts;
-        this.allowedPaths = allowedPaths;
     }
 
     public void addSource(WasmSource source) {
@@ -83,11 +75,4 @@ public class Manifest {
         }
         return Collections.unmodifiableList(allowedHosts);
     }
-
-    public Map<String, String> getAllowedPaths() {
-        if (allowedPaths == null || allowedPaths.isEmpty()) {
-            return Collections.emptyMap();
-        }
-        return Collections.unmodifiableMap(allowedPaths);
-    }
 }

java/src/main/java/org/extism/sdk/manifest/ManifestHttpRequest.java

@@ -3,27 +3,6 @@ package org.extism.sdk.manifest;
 import java.util.Map;
 
 // FIXME remove this and related stuff if not supported in java-sdk
-public class ManifestHttpRequest {
+public record ManifestHttpRequest(String url, Map<String, String> header, String method) {
+}
 
-    private final String url;
-    private final Map<String, String> header;
-    private final String method;
-
-    public ManifestHttpRequest(String url, Map<String, String> header, String method) {
-        this.url = url;
-        this.header = header;
-        this.method = method;
-    }
-
-    public String url() {
-        return url;
-    }
-
-    public Map<String, String> header() {
-        return header;
-    }
-
-    public String method() {
-        return method;
-    }
-}

java/src/main/java/org/extism/sdk/manifest/MemoryOptions.java

@@ -8,11 +8,5 @@ import com.google.gson.annotations.SerializedName;
  *
  * @param max Max number of pages.
  */
-public class MemoryOptions {
-    @SerializedName("max")
-    private final Integer max;
-
-    public MemoryOptions(Integer max) {
-        this.max = max;
-    }
+public record MemoryOptions(@SerializedName("max") Integer max) {
 }

java/src/main/java/org/extism/sdk/support/JsonSerde.java

@@ -1,14 +1,18 @@
 package org.extism.sdk.support;
 
-import com.google.gson.*;
-import com.google.gson.stream.JsonReader;
-import com.google.gson.stream.JsonToken;
-import com.google.gson.stream.JsonWriter;
+import com.google.gson.FieldNamingPolicy;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
 import org.extism.sdk.manifest.Manifest;
 
-import java.io.IOException;
 import java.lang.reflect.Type;
-import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 
 public class JsonSerde {
@@ -19,7 +23,7 @@ public class JsonSerde {
         GSON = new GsonBuilder() //
                 .disableHtmlEscaping() //
                 // needed to convert the byte[] to a base64 encoded String
-                .registerTypeHierarchyAdapter(byte[].class, new ByteArrayAdapter()) //
+                .registerTypeHierarchyAdapter(byte[].class, new ByteArrayToBase64TypeAdapter()) //
                 .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES) //
                 .setPrettyPrinting() //
                 .create();
@@ -29,28 +33,14 @@ public class JsonSerde {
         return GSON.toJson(manifest);
     }
 
-    private static class ByteArrayAdapter extends TypeAdapter<byte[]> {
+    private static class ByteArrayToBase64TypeAdapter implements JsonSerializer<byte[]>, JsonDeserializer<byte[]> {
 
-        @Override
-        public void write(JsonWriter out, byte[] byteValue) throws IOException {
-            out.value(new String(Base64.getEncoder().encode(byteValue)));
+        public byte[] deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return Base64.getDecoder().decode(json.getAsString());
         }
 
-        @Override
-        public byte[] read(JsonReader in) {
-            try {
-                if (in.peek() == JsonToken.NULL) {
-                    in.nextNull();
-                    return new byte[]{};
-                }
-                String byteValue = in.nextString();
-                if (byteValue != null) {
-                    return Base64.getDecoder().decode(byteValue);
-                }
-                return new byte[]{};
-            } catch (Exception e) {
-                throw new JsonParseException(e);
-            }
+        public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(Base64.getEncoder().withoutPadding().encodeToString(src));
         }
     }
 }

java/src/main/java/org/extism/sdk/wasm/ByteArrayWasmSource.java

@@ -2,37 +2,10 @@ package org.extism.sdk.wasm;
 
 /**
  * WASM Source represented by raw bytes.
+ *
+ * @param name
+ * @param data the byte array representing the WASM code
+ * @param hash
  */
-public class ByteArrayWasmSource implements WasmSource {
-
-    private final String name;
-    private final byte[] data;
-    private final String hash;
-
-
-    /**
-     * Constructor
-     * @param name
-     * @param data the byte array representing the WASM code
-     * @param hash
-     */
-    public ByteArrayWasmSource(String name, byte[] data, String hash) {
-        this.name = name;
-        this.data = data;
-        this.hash = hash;
-    }
-
-    @Override
-    public String name() {
-        return name;
-    }
-
-    @Override
-    public String hash() {
-        return hash;
-    }
-
-    public byte[] data() {
-        return data;
-    }
+public record ByteArrayWasmSource(String name, byte[] data, String hash) implements WasmSource {
 }

java/src/main/java/org/extism/sdk/wasm/PathWasmSource.java

@@ -2,39 +2,11 @@ package org.extism.sdk.wasm;
 
 /**
  * WASM Source represented by a file referenced by a path.
+ *
+ * @param name
+ * @param path
+ * @param hash
  */
-public class PathWasmSource implements WasmSource {
-
-    private final String name;
-
-    private final String path;
-
-    private final String hash;
-
-    /**
-     * Constructor
-     * @param name
-     * @param path
-     * @param hash
-     */
-    public PathWasmSource(String name, String path, String hash) {
-        this.name = name;
-        this.path = path;
-        this.hash = hash;
-    }
-
-    @Override
-    public String name() {
-        return name;
-    }
-
-    @Override
-    public String hash() {
-        return hash;
-    }
-
-    public String path() {
-        return path;
-    }
+public record PathWasmSource(String name, String path, String hash) implements WasmSource {
 }
 

java/src/test/java/org/extism/sdk/ManifestTests.java

@@ -6,7 +6,6 @@ import org.extism.sdk.support.JsonSerde;
 import org.junit.jupiter.api.Test;
 
 import java.util.List;
-import java.util.HashMap;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.extism.sdk.TestWasmSources.CODE;
@@ -17,16 +16,13 @@ public class ManifestTests {
 
     @Test
     public void shouldSerializeManifestWithWasmSourceToJson() {
-        var paths = new HashMap<String, String>();
-        paths.put("/tmp/foo", "/tmp/extism-plugins/foo");
-        var manifest = new Manifest(List.of(CODE.pathWasmSource()), null, null, null, paths);
+
+        var manifest = new Manifest(CODE.pathWasmSource());
         var json = JsonSerde.toJson(manifest);
         assertNotNull(json);
 
         assertJson(json).at("/wasm").isArray();
         assertJson(json).at("/wasm").hasSize(1);
-        assertJson(json).at("/allowed_paths").isObject();
-        assertJson(json).at("/allowed_paths").hasSize(1);
     }
 
     @Test

java/src/test/java/org/extism/sdk/PluginTests.java

@@ -1,12 +1,12 @@
 package org.extism.sdk;
 
-import com.sun.jna.Pointer;
 import org.extism.sdk.manifest.Manifest;
 import org.extism.sdk.manifest.MemoryOptions;
 import org.extism.sdk.wasm.WasmSourceResolver;
 import org.junit.jupiter.api.Test;
 
-import java.util.*;
+import java.util.List;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.extism.sdk.TestWasmSources.CODE;
@@ -20,10 +20,10 @@ public class PluginTests {
 
     @Test
     public void shouldInvokeFunctionWithMemoryOptions() {
+        //FIXME check whether memory options are effective
         var manifest = new Manifest(List.of(CODE.pathWasmSource()), new MemoryOptions(0));
-        assertThrows(ExtismException.class, () -> {
-            Extism.invokeFunction(manifest, "count_vowels", "Hello World");
-        });
+        var output = Extism.invokeFunction(manifest, "count_vowels", "Hello World");
+        assertThat(output).isEqualTo("{\"count\": 3}");
     }
 
     @Test
@@ -42,12 +42,14 @@ public class PluginTests {
         assertThat(output).isEqualTo("{\"count\": 3}");
     }
 
-     @Test
-     public void shouldInvokeFunctionFromByteArrayWasmSource() {
-         var manifest = new Manifest(CODE.byteArrayWasmSource());
-         var output = Extism.invokeFunction(manifest, "count_vowels", "Hello World");
-         assertThat(output).isEqualTo("{\"count\": 3}");
-     }
+    // TODO This test breaks on CI with error:
+    // data did not match any variant of untagged enum Wasm at line 8 column 3
+    // @Test
+    // public void shouldInvokeFunctionFromByteArrayWasmSource() {
+    //     var manifest = new Manifest(CODE.byteArrayWasmSource());
+    //     var output = Extism.invokeFunction(manifest, "count_vowels", "Hello World");
+    //     assertThat(output).isEqualTo("{\"count\": 3}");
+    // }
 
     @Test
     public void shouldFailToInvokeUnknownFunction() {
@@ -78,7 +80,7 @@ public class PluginTests {
         var input = "Hello World";
 
         try (var ctx = new Context()) {
-            try (var plugin = ctx.newPlugin(manifest, false, null)) {
+            try (var plugin = ctx.newPlugin(manifest, false)) {
                 var output = plugin.call(functionName, input);
                 assertThat(output).isEqualTo("{\"count\": 3}");
             }
@@ -92,7 +94,7 @@ public class PluginTests {
         var input = "Hello World";
 
         try (var ctx = new Context()) {
-            try (var plugin = ctx.newPlugin(manifest, false, null)) {
+            try (var plugin = ctx.newPlugin(manifest, false)) {
                 var output = plugin.call(functionName, input);
                 assertThat(output).isEqualTo("{\"count\": 3}");
 
@@ -102,118 +104,4 @@ public class PluginTests {
         }
     }
 
-    @Test
-    public void shouldAllowInvokeHostFunctionFromPDK() {
-        var parametersTypes = new LibExtism.ExtismValType[]{LibExtism.ExtismValType.I64};
-        var resultsTypes = new LibExtism.ExtismValType[]{LibExtism.ExtismValType.I64};
-
-        class MyUserData extends HostUserData {
-            private String data1;
-            private int data2;
-
-            public MyUserData(String data1, int data2) {
-                super();
-                this.data1 = data1;
-                this.data2 = data2;
-            }
-        }
-
-        ExtismFunction helloWorldFunction = (ExtismFunction<MyUserData>) (plugin, params, returns, data) -> {
-            System.out.println("Hello from Java Host Function!");
-            System.out.println(String.format("Input string received from plugin, %s", plugin.inputString(params[0])));
-
-            int offs = plugin.alloc(4);
-            Pointer mem = plugin.memory();
-            mem.write(offs, "test".getBytes(), 0, 4);
-            returns[0].v.i64 = offs;
-
-            data.ifPresent(d -> System.out.println(String.format("Host user data, %s, %d", d.data1, d.data2)));
-        };
-
-        HostFunction helloWorld = new HostFunction<>(
-                "hello_world",
-                parametersTypes,
-                resultsTypes,
-                helloWorldFunction,
-                Optional.of(new MyUserData("test", 2))
-        );
-
-        HostFunction[] functions = {helloWorld};
-
-        try (var ctx = new Context()) {
-            Manifest manifest = new Manifest(Arrays.asList(CODE.pathWasmFunctionsSource()));
-            String functionName = "count_vowels";
-
-            try (var plugin = ctx.newPlugin(manifest, true, functions)) {
-                var output = plugin.call(functionName, "this is a test");
-                assertThat(output).isEqualTo("test");
-            }
-        }
-    }
-
-    @Test
-    public void shouldAllowInvokeHostFunctionWithoutUserData() {
-
-        var parametersTypes = new LibExtism.ExtismValType[]{LibExtism.ExtismValType.I64};
-        var resultsTypes = new LibExtism.ExtismValType[]{LibExtism.ExtismValType.I64};
-
-        ExtismFunction helloWorldFunction = (plugin, params, returns, data) -> {
-            System.out.println("Hello from Java Host Function!");
-            System.out.println(String.format("Input string received from plugin, %s", plugin.inputString(params[0])));
-
-            int offs = plugin.alloc(4);
-            Pointer mem = plugin.memory();
-            mem.write(offs, "test".getBytes(), 0, 4);
-            returns[0].v.i64 = offs;
-
-            assertThat(data.isEmpty());
-        };
-
-        HostFunction f = new HostFunction<>(
-                "hello_world",
-                parametersTypes,
-                resultsTypes,
-                helloWorldFunction,
-                Optional.empty()
-        )
-                .withNamespace("env");
-
-        HostFunction g = new HostFunction<>(
-                "hello_world",
-                parametersTypes,
-                resultsTypes,
-                helloWorldFunction,
-                Optional.empty()
-        )
-                .withNamespace("test");
-
-        HostFunction[] functions = {f,g};
-
-        try (var ctx = new Context()) {
-            Manifest manifest = new Manifest(Arrays.asList(CODE.pathWasmFunctionsSource()));
-            String functionName = "count_vowels";
-
-            try (var plugin = ctx.newPlugin(manifest, true, functions)) {
-                var output = plugin.call(functionName, "this is a test");
-                assertThat(output).isEqualTo("test");
-            }
-        }
-    }
-
-
-    @Test
-    public void shouldFailToInvokeUnknownHostFunction() {
-        try (var ctx = new Context()) {
-            Manifest manifest = new Manifest(Arrays.asList(CODE.pathWasmFunctionsSource()));
-            String functionName = "count_vowels";
-
-            try {
-                var plugin = ctx.newPlugin(manifest, true, null);
-                plugin.call(functionName, "this is a test");
-            }  catch (ExtismException e) {
-                assertThat(e.getMessage()).contains("unknown import: `env::hello_world` has not been defined");
-            }
-        }
-    }
-
 }

java/src/test/java/org/extism/sdk/TestWasmSources.java

@@ -16,28 +16,19 @@ public enum TestWasmSources {
         public Path getWasmFilePath() {
             return Paths.get(WASM_LOCATION, "code.wasm");
         }
-        public Path getWasmFunctionsFilePath() {
-            return Paths.get(WASM_LOCATION, "code-functions.wasm");
-        }
     };
 
     public static final String WASM_LOCATION = "src/test/resources";
 
     public abstract Path getWasmFilePath();
 
-    public abstract Path getWasmFunctionsFilePath();
-
     public PathWasmSource pathWasmSource() {
         return resolvePathWasmSource(getWasmFilePath());
     }
 
-    public PathWasmSource pathWasmFunctionsSource() {
-        return resolvePathWasmSource(getWasmFunctionsFilePath());
-    }
-
     public ByteArrayWasmSource byteArrayWasmSource() {
         try {
-            byte[] wasmBytes = Files.readAllBytes(getWasmFilePath());
+            var wasmBytes = Files.readAllBytes(getWasmFilePath());
             return new WasmSourceResolver().resolve("wasm@" + Arrays.hashCode(wasmBytes), wasmBytes);
         } catch (IOException ioe) {
             throw new RuntimeException(ioe);

kernel/.cargo/config

@@ -1,2 +0,0 @@
-[build]
-target = "wasm32-unknown-unknown"

kernel/Cargo.toml

@@ -1,11 +0,0 @@
-[package]
-name = "extism-runtime-kernel"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-
-[workspace]
-members = [
-  "."
-]

kernel/README.md

@@ -1,20 +0,0 @@
-# Extism kernel
-
-The Extism kernel implements core parts of the Extism runtime in Rust compiled to WebAssembly. This code is a conceptual
-re-write of [memory.rs][] with the goal of making core parts of the Extism implementation more portable across WebAssembly
-runtimes.
-
-See [lib.rs][] for more details about the implementation itself.
-
-## Building
-
-Because this crate is built using the `wasm32-unknown-unknown` target, it is a separate build process from the `extism-runtime` crate. 
-
-To build `extism-runtime.wasm`, strip it and copy it to the proper location in the `extism-runtime` tree you can run:
-
-```shell
-$ sh build.sh
-```
-
-[memory.rs]: https://github.com/extism/extism/blob/f4aa139eced4a74eb4a103f78222ba503e146109/runtime/src/memory.rs
-[lib.rs]: ./src/lib.rs

kernel/build.sh

@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-cargo build --release --target wasm32-unknown-unknown --package extism-runtime-kernel --bin extism-runtime
-cp target/wasm32-unknown-unknown/release/extism-runtime.wasm .
-wasm-strip extism-runtime.wasm || :
-mv extism-runtime.wasm ../runtime/src/extism-runtime.wasm
-

kernel/src/bin/extism-runtime.rs

@@ -1,10 +0,0 @@
-#![no_main]
-#![no_std]
-
-pub use extism_runtime_kernel::*;
-
-#[cfg(target_arch = "wasm32")]
-#[panic_handler]
-fn panic(_info: &core::panic::PanicInfo) -> ! {
-    core::arch::wasm32::unreachable()
-}

kernel/src/lib.rs

@@ -1,446 +0,0 @@
-//! # Extism kernel
-//!
-//! - Isolated memory from both host and plugin
-//! - An allocator for managing that memory
-//! - Input/output handling
-//! - Error message handling
-//! - Backward compatible `extism_*` functions
-//!
-//! ## Allocator
-//!
-//! The Extism allocator is a bump allocator that tracks the `length` of the total number of bytes
-//! available to the allocator and `position` to track how much of the data has been used. Things like memory
-//! have not really been optimized at all. When a new allocation that is larger than the remaning size is made,
-//! the allocator attempts to call `memory.grow` if that fails a `0` offset is returned, which should be interpreted
-//! as a failed allocation.
-//!
-//! ## Input/Output
-//!
-//! Input and output are just allocated blocks of memory that are marked as either input or output using
-//! the `extism_input_set` or `extism_output_set` functions. The global variables `INPUT_OFFSET` contains
-//! the offset in memory to the input data and `INPUT_LENGTH` contains the size of the input data. `OUTPUT_OFFSET`
-//! and `OUTPUT_LENGTH` are used for the output data.
-//!
-//! ## Error handling
-//!
-//! The `ERROR` global is used to track the current error message. If it is set to `0` then there is no error.
-//! The length of the error message can be retreived using `extism_length`.
-//!
-//! ## Memory offsets
-//! An offset of `0` is similar to a `NULL` pointer in C - it implies an allocation failure or memory error
-//! of some kind
-//!
-//! ## Extism functions
-//!
-//! These functions are backward compatible with the pre-kernel runtime, but a few new functions are added to
-//! give runtimes more access to the internals necesarry to load data in and out of a plugin.
-#![no_std]
-#![allow(clippy::missing_safety_doc)]
-
-use core::sync::atomic::*;
-
-pub type Pointer = u64;
-pub type Length = u64;
-
-/// WebAssembly page size
-const PAGE_SIZE: usize = 65536;
-
-/// Determines the amount of bytes that can be wasted by re-using a block. If more than this number is wasted by re-using
-/// a block then it will be split into two smaller blocks.
-const BLOCK_SPLIT_SIZE: usize = 128;
-
-/// Offset to the input data
-static mut INPUT_OFFSET: Pointer = 0;
-
-/// Length of the input data
-static mut INPUT_LENGTH: Length = 0;
-
-/// Offset to the output data
-static mut OUTPUT_OFFSET: Pointer = 0;
-
-/// Offset to the input data
-static mut OUTPUT_LENGTH: Length = 0;
-
-/// Current error message
-static mut ERROR: AtomicU64 = AtomicU64::new(0);
-
-/// Determines if the kernel has been initialized already
-static mut INITIALIZED: AtomicBool = AtomicBool::new(false);
-
-/// A pointer to the first page that will be managed by Extism, this is set during initialization
-static mut START_PAGE: usize = 0;
-
-/// Provides information about the usage status of a `MemoryBlock`
-#[repr(u8)]
-#[derive(PartialEq)]
-pub enum MemoryStatus {
-    /// Unused memory that is available b
-    Unused = 0,
-    /// In-use memory
-    Active = 1,
-    /// Free memory that is available for re-use
-    Free = 2,
-}
-
-/// A single `MemoryRoot` exists at the start of the memory to track information about the total
-/// size of the allocated memory and the position of the bump allocator.
-///
-/// The overall layout of the Extism-manged memory is organized like this:
-
-/// |------|-------|---------|-------|--------------|
-/// | Root | Block |  Data   | Block |     Data     | ...
-/// |------|-------|---------|-------|--------------|
-///
-/// Where `Root` and `Block` are fixed to the size of the `MemoryRoot` and `MemoryBlock` structs. But
-/// the size of `Data` is dependent on the allocation size.
-#[repr(C)]
-pub struct MemoryRoot {
-    /// Position of the bump allocator, relative to `START_PAGE`
-    pub position: AtomicU64,
-    /// The total size of all data allocated using this allocator
-    pub length: AtomicU64,
-    /// A pointer to where the blocks begin
-    pub blocks: [MemoryBlock; 0],
-}
-
-/// A `MemoryBlock` contains some metadata about a single allocation
-#[repr(C)]
-pub struct MemoryBlock {
-    /// The usage status of the block, `Unused` or `Free` blocks can be re-used.
-    pub status: AtomicU8,
-    /// The total size of the allocation
-    pub size: usize,
-    /// The number of bytes currently being used. If this block is a fresh allocation then `size` and `used` will
-    /// always be the same. If a block is re-used then these numbers may differ.
-    pub used: usize,
-    /// A pointer to the block data
-    pub data: [u8; 0],
-}
-
-/// Returns the number of pages needed for the given number of bytes
-pub fn num_pages(nbytes: u64) -> usize {
-    let nbytes = nbytes as f64;
-    let page = PAGE_SIZE as f64;
-    ((nbytes / page) + 0.5) as usize
-}
-
-// Get the `MemoryRoot` at the correct offset in memory
-#[inline]
-unsafe fn memory_root() -> &'static mut MemoryRoot {
-    &mut *((START_PAGE * PAGE_SIZE) as *mut MemoryRoot)
-}
-
-impl MemoryRoot {
-    /// Initialize or load the `MemoryRoot` from the correct position in memory
-    pub unsafe fn new() -> &'static mut MemoryRoot {
-        // If this fails then `INITIALIZED` is already `true` and we can just return the
-        // already initialized `MemoryRoot`
-        if INITIALIZED
-            .compare_exchange(false, true, Ordering::Acquire, Ordering::Relaxed)
-            .is_err()
-        {
-            return memory_root();
-        }
-
-        // Ensure that at least one page is allocated to store the `MemoryRoot` data
-        START_PAGE = core::arch::wasm32::memory_grow(0, 1);
-        if START_PAGE == usize::MAX {
-            panic!("Out of memory");
-        }
-
-        // Initialize the `MemoryRoot` length, position and data
-        let root = memory_root();
-        root.length.store(
-            PAGE_SIZE as u64 - core::mem::size_of::<MemoryRoot>() as u64,
-            Ordering::Release,
-        );
-        root.position.store(0, Ordering::Release);
-
-        // Ensure the first block is marked as `Unused`
-        #[allow(clippy::size_of_in_element_count)]
-        core::ptr::write_bytes(
-            root.blocks.as_mut_ptr() as *mut _,
-            MemoryStatus::Unused as u8,
-            core::mem::size_of::<MemoryBlock>(),
-        );
-        root
-    }
-
-    /// Resets the position of the allocator and zeroes out all allocations
-    pub unsafe fn reset(&mut self) {
-        core::ptr::write_bytes(
-            self.blocks.as_mut_ptr() as *mut u8,
-            0,
-            self.length.load(Ordering::Acquire) as usize,
-        );
-        self.position.store(0, Ordering::Release);
-    }
-
-    // Find a block that is free to use, this can be a new block or an existing freed block. The `self_position` argument
-    // is used to avoid loading the allocators position more than once when performing an allocation.
-    unsafe fn find_free_block(
-        &mut self,
-        length: Length,
-        self_position: u64,
-    ) -> Option<&'static mut MemoryBlock> {
-        // Get the first block
-        let mut block = self.blocks.as_mut_ptr();
-
-        // Only loop while the block pointer is less then the current position
-        while (block as u64) < self.blocks.as_ptr() as u64 + self_position {
-            let b = &mut *block;
-
-            let status = b.status.load(Ordering::Acquire);
-
-            // An unused block is safe to use
-            if status == MemoryStatus::Unused as u8 {
-                return Some(b);
-            }
-
-            // Re-use freed blocks when they're large enough
-            if status == MemoryStatus::Free as u8 && b.size >= length as usize {
-                // Split block if there is too much excess
-                if b.size - length as usize >= BLOCK_SPLIT_SIZE {
-                    b.size -= length as usize;
-                    b.used = 0;
-
-                    let block1 = b.data.as_mut_ptr().add(b.size) as *mut MemoryBlock;
-                    let b1 = &mut *block1;
-                    b1.size = length as usize;
-                    b1.used = 0;
-                    b1.status.store(MemoryStatus::Free as u8, Ordering::Release);
-                    return Some(b1);
-                }
-
-                // Otherwise return the whole block
-                return Some(b);
-            }
-
-            // Get the next block
-            block = b.next_ptr();
-        }
-
-        None
-    }
-
-    /// Create a new `MemoryBlock`, when `Some(block)` is returned, `block` will contain at least enough room for `length` bytes
-    /// but may be as large as `length` + `BLOCK_SPLIT_SIZE` bytes. When `None` is returned the allocation has failed.
-    pub unsafe fn alloc(&mut self, length: Length) -> Option<&'static mut MemoryBlock> {
-        let self_position = self.position.load(Ordering::Acquire);
-        let self_length = self.length.load(Ordering::Acquire);
-        let b = self.find_free_block(length, self_position);
-
-        // If there's a free block then re-use it
-        if let Some(b) = b {
-            b.used = length as usize;
-            b.status
-                .store(MemoryStatus::Active as u8, Ordering::Release);
-            return Some(b);
-        }
-
-        // Get the current index for a new block
-        let curr = self.blocks.as_ptr() as u64 + self_position;
-
-        // Get the number of bytes available
-        let mem_left = self_length - self_position;
-
-        // When the allocation is larger than the number of bytes available
-        // we will need to try to grow the memory
-        if length >= mem_left {
-            // Calculate the number of pages needed to cover the remaining bytes
-            let npages = num_pages(length);
-            let x = core::arch::wasm32::memory_grow(0, npages);
-            if x == usize::MAX {
-                return None;
-            }
-            self.length
-                .fetch_add(npages as u64 * PAGE_SIZE as u64, Ordering::SeqCst);
-        }
-
-        // Bump the position by the size of the actual data + the size of the MemoryBlock structure
-        self.position.fetch_add(
-            length + core::mem::size_of::<MemoryBlock>() as u64,
-            Ordering::SeqCst,
-        );
-
-        // Initialize a new block at the current position
-        let ptr = curr as *mut MemoryBlock;
-        let block = &mut *ptr;
-        block
-            .status
-            .store(MemoryStatus::Active as u8, Ordering::Release);
-        block.size = length as usize;
-        block.used = length as usize;
-        Some(block)
-    }
-
-    /// Finds the block at an offset in memory
-    pub unsafe fn find_block(&mut self, offs: Pointer) -> Option<&mut MemoryBlock> {
-        if offs >= self.blocks.as_ptr() as Pointer + self.length.load(Ordering::Acquire) as Pointer
-        {
-            return None;
-        }
-        let ptr = offs - core::mem::size_of::<MemoryBlock>() as u64;
-        let ptr = ptr as *mut MemoryBlock;
-        Some(&mut *ptr)
-    }
-}
-
-impl MemoryBlock {
-    /// Get a pointer to the next block
-    ///
-    /// NOTE: This does no checking to ensure the resulting pointer is valid, the offset
-    /// is calculated based on metadata provided by the current block
-    #[inline]
-    pub unsafe fn next_ptr(&mut self) -> *mut MemoryBlock {
-        self.data
-            .as_mut_ptr()
-            .add(self.size + core::mem::size_of::<MemoryBlock>()) as *mut MemoryBlock
-    }
-
-    /// Mark a block as free
-    pub fn free(&mut self) {
-        self.status
-            .store(MemoryStatus::Free as u8, Ordering::Release);
-    }
-}
-
-// Extism functions - these functions should be
-
-/// Allocate a block of memory and return the offset
-#[no_mangle]
-pub unsafe fn extism_alloc(n: Length) -> Pointer {
-    let region = MemoryRoot::new();
-    let block = region.alloc(n);
-    match block {
-        Some(block) => block.data.as_mut_ptr() as Pointer,
-        None => 0,
-    }
-}
-
-/// Free allocated memory
-#[no_mangle]
-pub unsafe fn extism_free(p: Pointer) {
-    let block = MemoryRoot::new().find_block(p);
-    if let Some(block) = block {
-        block.free();
-    }
-}
-
-/// Get the length of an allocated memory block
-#[no_mangle]
-pub unsafe fn extism_length(p: Pointer) -> Length {
-    if p == 0 {
-        return 0;
-    }
-    if let Some(block) = MemoryRoot::new().find_block(p) {
-        block.used as Length
-    } else {
-        0
-    }
-}
-
-/// Load a byte from Extism-managed memory
-#[no_mangle]
-pub unsafe fn extism_load_u8(p: Pointer) -> u8 {
-    *(p as *mut u8)
-}
-
-/// Load a u64 from Extism-managed memory
-#[no_mangle]
-pub unsafe fn extism_load_u64(p: Pointer) -> u64 {
-    *(p as *mut u64)
-}
-
-/// Load a byte from the input data
-#[no_mangle]
-pub unsafe fn extism_input_load_u8(p: Pointer) -> u8 {
-    *((INPUT_OFFSET + p) as *mut u8)
-}
-
-/// Load a u64 from the input data
-#[no_mangle]
-pub unsafe fn extism_input_load_u64(p: Pointer) -> u64 {
-    *((INPUT_OFFSET + p) as *mut u64)
-}
-
-/// Write a byte in Extism-managed memory
-#[no_mangle]
-pub unsafe fn extism_store_u8(p: Pointer, x: u8) {
-    *(p as *mut u8) = x;
-}
-
-/// Write a u64 in Extism-managed memory
-#[no_mangle]
-pub unsafe fn extism_store_u64(p: Pointer, x: u64) {
-    unsafe {
-        *(p as *mut u64) = x;
-    }
-}
-
-/// Set the range of the input data in memory
-#[no_mangle]
-pub fn extism_input_set(p: Pointer, len: Length) {
-    unsafe {
-        INPUT_OFFSET = p;
-        INPUT_LENGTH = len;
-    }
-}
-
-/// Set the range of the output data in memory
-#[no_mangle]
-pub fn extism_output_set(p: Pointer, len: Length) {
-    unsafe {
-        OUTPUT_OFFSET = p;
-        OUTPUT_LENGTH = len;
-    }
-}
-
-/// Get the input length
-#[no_mangle]
-pub fn extism_input_length() -> Length {
-    unsafe { INPUT_LENGTH }
-}
-
-/// Get the input offset in Exitsm-managed memory
-#[no_mangle]
-pub fn extism_input_offset() -> Length {
-    unsafe { INPUT_OFFSET }
-}
-
-/// Get the output length
-#[no_mangle]
-pub fn extism_output_length() -> Length {
-    unsafe { OUTPUT_LENGTH }
-}
-
-/// Get the output offset in Extism-managed memory
-#[no_mangle]
-pub fn extism_output_offset() -> Length {
-    unsafe { OUTPUT_OFFSET }
-}
-
-/// Reset the allocator
-#[no_mangle]
-pub unsafe fn extism_reset() {
-    ERROR.store(0, Ordering::SeqCst);
-    MemoryRoot::new().reset()
-}
-
-/// Set the error message offset
-#[no_mangle]
-pub unsafe fn extism_error_set(ptr: Pointer) {
-    ERROR.store(ptr, Ordering::SeqCst);
-}
-
-/// Get the error message offset, if it's `0` then no error has been set
-#[no_mangle]
-pub unsafe fn extism_error_get() -> Pointer {
-    ERROR.load(Ordering::SeqCst)
-}
-
-/// Get the position of the allocator, this can be used as an indication of how many bytes are currently in-use
-#[no_mangle]
-pub unsafe fn extism_memory_bytes() -> Length {
-    MemoryRoot::new().position.load(Ordering::Acquire)
-}

libextism.pc

@@ -0,0 +1,10 @@
+prefix=/usr/local
+exec_prefix=${prefix}
+includedir=${prefix}/include
+libdir=${exec_prefix}/lib
+
+Name: extism
+Description: The Extism universal plug-in system.
+Version: 0.1.0
+Cflags: -I${includedir}
+Libs: -L${libdir} -lextism

libextism/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libextism"
-version = "0.4.0"
+version = "0.1.0"
 edition = "2021"
 authors = ["The Extism Authors", "oss@extism.org"]
 license = "BSD-3-Clause"
@@ -20,4 +20,4 @@ default = ["http", "register-http", "register-filesystem"]
 nn = ["extism-runtime/nn"]
 register-http = ["extism-runtime/register-http"] # enables wasm to be downloaded using http
 register-filesystem = ["extism-runtime/register-filesystem"] # enables wasm to be loaded from disk
-http = ["extism-runtime/http"] # enables extism_http_request
+http = ["extism-runtime/http"] # enables extism_http_request

manifest/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "extism-manifest"
-version = "0.5.0"
+version = "0.1.0"
 edition = "2021"
 authors = ["The Extism Authors", "oss@extism.org"]
 license = "BSD-3-Clause"

manifest/src/lib.rs

@@ -4,17 +4,15 @@ use std::path::{Path, PathBuf};
 #[deprecated]
 pub type ManifestMemory = MemoryOptions;
 
-#[derive(Default, Clone, serde::Serialize, serde::Deserialize)]
+#[derive(Default, serde::Serialize, serde::Deserialize)]
 #[cfg_attr(feature = "json_schema", derive(schemars::JsonSchema))]
-#[serde(deny_unknown_fields)]
 pub struct MemoryOptions {
     #[serde(alias = "max")]
     pub max_pages: Option<u32>,
 }
 
-#[derive(Clone, serde::Serialize, serde::Deserialize)]
+#[derive(serde::Serialize, serde::Deserialize)]
 #[cfg_attr(feature = "json_schema", derive(schemars::JsonSchema))]
-#[serde(deny_unknown_fields)]
 pub struct HttpRequest {
     pub url: String,
     #[serde(default)]
@@ -43,9 +41,8 @@ impl HttpRequest {
     }
 }
 
-#[derive(Default, Clone, serde::Serialize, serde::Deserialize)]
+#[derive(Default, serde::Serialize, serde::Deserialize)]
 #[cfg_attr(feature = "json_schema", derive(schemars::JsonSchema))]
-#[serde(deny_unknown_fields)]
 pub struct WasmMetadata {
     pub name: Option<String>,
     pub hash: Option<String>,
@@ -81,10 +78,9 @@ impl From<Vec<u8>> for Wasm {
 #[deprecated]
 pub type ManifestWasm = Wasm;
 
-#[derive(Clone, serde::Serialize, serde::Deserialize)]
+#[derive(serde::Serialize, serde::Deserialize)]
 #[cfg_attr(feature = "json_schema", derive(schemars::JsonSchema))]
 #[serde(untagged)]
-#[serde(deny_unknown_fields)]
 pub enum Wasm {
     File {
         path: PathBuf,
@@ -153,9 +149,8 @@ fn base64_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::
     schema.into()
 }
 
-#[derive(Default, Clone, serde::Serialize, serde::Deserialize)]
+#[derive(Default, serde::Serialize, serde::Deserialize)]
 #[cfg_attr(feature = "json_schema", derive(schemars::JsonSchema))]
-#[serde(deny_unknown_fields)]
 pub struct Manifest {
     #[serde(default)]
     pub wasm: Vec<Wasm>,
@@ -255,19 +250,16 @@ impl Manifest {
 }
 
 mod base64 {
-    use base64::{engine::general_purpose, Engine as _};
     use serde::{Deserialize, Serialize};
     use serde::{Deserializer, Serializer};
 
     pub fn serialize<S: Serializer>(v: &Vec<u8>, s: S) -> Result<S::Ok, S::Error> {
-        let base64 = general_purpose::STANDARD.encode(v);
+        let base64 = base64::encode(v);
         String::serialize(&base64, s)
     }
 
     pub fn deserialize<'de, D: Deserializer<'de>>(d: D) -> Result<Vec<u8>, D::Error> {
         let base64 = String::deserialize(d)?;
-        general_purpose::STANDARD
-            .decode(base64.as_bytes())
-            .map_err(serde::de::Error::custom)
+        base64::decode(base64.as_bytes()).map_err(serde::de::Error::custom)
     }
 }

node/example.js

@@ -1,45 +1,22 @@
-const {
-  Plugin,
-  HostFunction,
-  ValType,
-} = require("./dist/index.js");
-const { readFileSync } = require("fs");
+const { withContext, Context } = require('./dist/index.js');
+const { readFileSync } = require('fs');
 
-function f(currentPlugin, inputs, outputs, userData) {
-  console.log(currentPlugin.inputString(inputs[0]));
-  console.log("Hello from Javascript!");
-  console.log(userData);
-  outputs[0] = inputs[0];
-}
-
-const hello_world = new HostFunction(
-  "hello_world",
-  [ValType.I64],
-  [ValType.I64],
-  f,
-  "Hello again!",
-);
-
-async function main() {
-  const functions = [hello_world];
-
-  const wasm = readFileSync("../wasm/code-functions.wasm");
-  const p = new Plugin(wasm, true, functions);
+withContext(async function (context) {
+  let wasm = readFileSync("../wasm/code.wasm");
+  let p = context.plugin(wasm);
 
   if (!p.functionExists("count_vowels")) {
     console.log("no function 'count_vowels' in wasm");
     process.exit(1);
   }
 
-  const buf = await p.call("count_vowels", process.argv[2] || "this is a test");
+  let buf = await p.call("count_vowels", process.argv[2] || "this is a test");
   console.log(JSON.parse(buf.toString())["count"]);
   p.free();
-}
-
-main();
+});
 
 // or, use a context like this:
-// let ctx = new Context();
-// let wasm = readFileSync("../wasm/code.wasm");
-// let p = ctx.plugin(wasm);
+let ctx = new Context();
+let wasm = readFileSync("../wasm/code.wasm");
+let p = ctx.plugin(wasm);
 // ... where the context can be passed around to various functions etc.

node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@extism/extism",
-  "version": "0.4.0",
+  "version": "0.1.0",
   "description": "Extism Host SDK for Node",
   "keywords": [
     "extism",
@@ -21,17 +21,12 @@
   },
   "scripts": {
     "prepare": "npm run build",
-    "example": "npm run build && node example.js",
+    "example": "node example.js",
     "build": "tsc",
     "test": "jest --coverage"
   },
   "dependencies": {
-    "@types/ref-array-di": "^1.2.5",
-    "ffi-napi": "^4.0.3",
-    "ref-array-di": "^1.2.2",
-    "ref-napi": "^3.0.3",
-    "ref-struct-di": "^1.1.1",
-    "ref-union-di": "^1.0.1"
+    "ffi-napi": "^4.0.3"
   },
   "publishConfig": {
     "access": "public"
@@ -39,12 +34,12 @@
   "devDependencies": {
     "@types/ffi-napi": "^4.0.6",
     "@types/jest": "^29.2.0",
-    "@types/node": "^20.1.0",
+    "@types/node": "^18.11.4",
     "jest": "^29.2.2",
-    "prettier": "3.0.2",
+    "prettier": "2.8.2",
     "ts-jest": "^29.0.3",
     "ts-node": "^10.9.1",
-    "typedoc": "^0.24.1",
-    "typescript": "^5.0.4"
+    "typedoc": "^0.23.18",
+    "typescript": "^4.8.4"
   }
 }

node/src/index.ts

@@ -1,100 +1,30 @@
 import ffi from "ffi-napi";
-import ref from "ref-napi";
 import path from "path";
 
-var ArrayType = require("ref-array-di")(ref);
-var StructType = require("ref-struct-di")(ref);
-var UnionType = require("ref-union-di")(ref);
-
-const opaque = ref.types.void;
-const context = ref.refType(opaque);
-
-const function_t = ref.refType(opaque);
-const pluginIndex = ref.types.int32;
-
-let ValTypeArray = ArrayType(ref.types.int);
-let PtrArray = new ArrayType("void*");
-
-let ValUnion = new UnionType({
-  i32: ref.types.uint32,
-  i64: ref.types.uint64,
-  f32: ref.types.float,
-  f64: ref.types.double,
-});
-
-/**
- * Val struct, low-level WebAssembly values
- */
-let Val = new StructType({
-  t: ref.types.int,
-  v: ValUnion,
-});
-
-/**
- * Array of `Val`
- */
-let ValArray = ArrayType(Val);
-
+const context = "void*";
 const _functions = {
   extism_context_new: [context, []],
   extism_context_free: ["void", [context]],
-  extism_plugin_new: [
-    pluginIndex,
-    [context, "string", "uint64", PtrArray, "uint64", "bool"],
-  ],
+  extism_plugin_new: ["int32", [context, "string", "uint64", "bool"]],
   extism_plugin_update: [
     "bool",
-    [context, pluginIndex, "string", "uint64", PtrArray, "uint64", "bool"],
+    [context, "int32", "string", "uint64", "bool"],
   ],
-  extism_error: ["string", [context, pluginIndex]],
+  extism_error: ["char*", [context, "int32"]],
   extism_plugin_call: [
     "int32",
-    [context, pluginIndex, "string", "string", "uint64"],
+    [context, "int32", "string", "string", "uint64"],
   ],
-  extism_plugin_output_length: ["uint64", [context, pluginIndex]],
-  extism_plugin_output_data: ["uint8*", [context, pluginIndex]],
+  extism_plugin_output_length: ["uint64", [context, "int32"]],
+  extism_plugin_output_data: ["uint8*", [context, "int32"]],
   extism_log_file: ["bool", ["string", "char*"]],
-  extism_plugin_function_exists: ["bool", [context, pluginIndex, "string"]],
-  extism_plugin_config: ["void", [context, pluginIndex, "char*", "uint64"]],
-  extism_plugin_free: ["void", [context, pluginIndex]],
+  extism_plugin_function_exists: ["bool", [context, "int32", "string"]],
+  extism_plugin_config: ["void", [context, "int32", "char*", "uint64"]],
+  extism_plugin_free: ["void", [context, "int32"]],
   extism_context_reset: ["void", [context]],
-  extism_version: ["string", []],
-  extism_function_new: [
-    function_t,
-    [
-      "string",
-      ValTypeArray,
-      "uint64",
-      ValTypeArray,
-      "uint64",
-      "void*",
-      "void*",
-      "void*",
-    ],
-  ],
-  extism_function_free: ["void", [function_t]],
-  extism_function_set_namespace: ["void", [function_t, "string"]],
-  extism_current_plugin_memory: ["uint8*", ["void*"]],
-  extism_current_plugin_memory_alloc: ["uint64", ["void*", "uint64"]],
-  extism_current_plugin_memory_length: ["uint64", ["void*", "uint64"]],
-  extism_current_plugin_memory_free: ["void", ["void*", "uint64"]],
-  extism_plugin_cancel_handle: ["void*", [context, pluginIndex]],
-  extism_plugin_cancel: ["bool", ["void*"]],
+  extism_version: ["char*", []],
 };
 
-/**
- * An enumeration of all possible `Val` types
- */
-export enum ValType {
-  I32 = 0,
-  I64,
-  F32,
-  F64,
-  V128,
-  FuncRef,
-  ExternRef,
-}
-
 interface LibExtism {
   extism_context_new: () => Buffer;
   extism_context_free: (ctx: Buffer) => void;
@@ -102,62 +32,40 @@ interface LibExtism {
     ctx: Buffer,
     data: string | Buffer,
     data_len: number,
-    functions: Buffer,
-    nfunctions: number,
-    wasi: boolean,
+    wasi: boolean
   ) => number;
   extism_plugin_update: (
     ctx: Buffer,
     plugin_id: number,
     data: string | Buffer,
     data_len: number,
-    functions: Buffer,
-    nfunctions: number,
-    wasi: boolean,
+    wasi: boolean
   ) => boolean;
-  extism_error: (ctx: Buffer, plugin_id: number) => string;
+  extism_error: (ctx: Buffer, plugin_id: number) => Buffer;
   extism_plugin_call: (
     ctx: Buffer,
     plugin_id: number,
     func: string,
     input: string,
-    input_len: number,
+    input_len: number
   ) => number;
   extism_plugin_output_length: (ctx: Buffer, plugin_id: number) => number;
-  extism_plugin_output_data: (ctx: Buffer, plugin_id: number) => Uint8Array;
+  extism_plugin_output_data: (ctx: Buffer, plugin_id: Number) => Uint8Array;
   extism_log_file: (file: string, level: string) => boolean;
   extism_plugin_function_exists: (
     ctx: Buffer,
     plugin_id: number,
-    func: string,
+    func: string
   ) => boolean;
   extism_plugin_config: (
     ctx: Buffer,
     plugin_id: number,
     data: string | Buffer,
-    data_len: number,
+    data_len: number
   ) => void;
   extism_plugin_free: (ctx: Buffer, plugin_id: number) => void;
   extism_context_reset: (ctx: Buffer) => void;
-  extism_version: () => string;
-  extism_function_new: (
-    name: string,
-    inputs: Buffer,
-    nInputs: number,
-    outputs: Buffer,
-    nOutputs: number,
-    f: Buffer,
-    user_data: Buffer | null,
-    free: Buffer | null,
-  ) => Buffer;
-  extism_function_set_namespace: (f: Buffer, s: string) => void;
-  extism_function_free: (f: Buffer) => void;
-  extism_current_plugin_memory: (p: Buffer) => Buffer;
-  extism_current_plugin_memory_alloc: (p: Buffer, n: number) => number;
-  extism_current_plugin_memory_length: (p: Buffer, n: number) => number;
-  extism_current_plugin_memory_free: (p: Buffer, n: number) => void;
-  extism_plugin_cancel_handle: (p: Buffer, n: number) => Buffer;
-  extism_plugin_cancel: (p: Buffer) => boolean;
+  extism_version: () => Buffer;
 }
 
 function locate(paths: string[]): LibExtism {
@@ -202,19 +110,19 @@ export function setLogFile(filename: string, level?: string) {
  * @returns The version string of the Extism runtime
  */
 export function extismVersion(): string {
-  return lib.extism_version();
+  return lib.extism_version().toString();
 }
 
+// @ts-ignore
+const pluginRegistry = new FinalizationRegistry(({ id, pointer }) => {
+  if (id && pointer) lib.extism_plugin_free(pointer, id);
+});
+
 // @ts-ignore
 const contextRegistry = new FinalizationRegistry((pointer) => {
   if (pointer) lib.extism_context_free(pointer);
 });
 
-// @ts-ignore
-const functionRegistry = new FinalizationRegistry((pointer) => {
-  if (pointer) lib.extism_function_free(pointer);
-});
-
 /**
  * Represents a path or url to a WASM module
  */
@@ -253,7 +161,7 @@ export type ManifestWasm = ManifestWasmFile | ManifestWasmData;
 /**
  * The manifest which describes the {@link Plugin} code and
  * runtime constraints.
- *
+ * 
  * @see [Extism > Concepts > Manifest](https://extism.org/docs/concepts/manifest)
  */
 export type Manifest = {
@@ -306,7 +214,7 @@ export class Context {
    */
   constructor() {
     this.pointer = lib.extism_context_new();
-    contextRegistry.register(this, this.pointer, this.pointer);
+    contextRegistry.register(this, this.pointer, this);
   }
 
   /**
@@ -317,24 +225,19 @@ export class Context {
    * @param config - Config details for the plugin
    * @returns A new Plugin scoped to this Context
    */
-  plugin(
-    manifest: ManifestData,
-    wasi: boolean = false,
-    functions: HostFunction[] = [],
-    config?: PluginConfig,
-  ) {
-    return new Plugin(manifest, wasi, functions, config, this);
+  plugin(manifest: ManifestData, wasi: boolean = false, config?: PluginConfig) {
+    return new Plugin(this, manifest, wasi, config);
   }
 
   /**
    * Frees the context. Should be called after the context is not needed to reclaim the memory.
    */
   free() {
-    contextRegistry.unregister(this.pointer);
     if (this.pointer) {
+      contextRegistry.unregister(this);
       lib.extism_context_free(this.pointer);
-      this.pointer = null;
     }
+    this.pointer = null;
   }
 
   /**
@@ -365,246 +268,27 @@ export async function withContext(f: (ctx: Context) => Promise<any>) {
   }
 }
 
-/**
- * Provides access to the plugin that is currently running from inside a {@link HostFunction}
- */
-export class CurrentPlugin {
-  pointer: Buffer;
-
-  constructor(pointer: Buffer) {
-    this.pointer = pointer;
-  }
-
-  /**
-   * Access plugin's memory
-   * @param offset - The offset in memory
-   * @returns a pointer to the provided offset
-   */
-  memory(offset: number): Buffer {
-    let length = lib.extism_current_plugin_memory_length(this.pointer, offset);
-    return Buffer.from(
-      lib.extism_current_plugin_memory(this.pointer).buffer,
-      offset,
-      length,
-    );
-  }
-
-  /**
-   * Allocate a new memory block
-   * @param n - The number of bytes to allocate
-   * @returns the offset to the newly allocated block
-   */
-  memoryAlloc(n: number): number {
-    return lib.extism_current_plugin_memory_alloc(this.pointer, n);
-  }
-
-  /**
-   * Free a memory block
-   * @param offset - The offset of the block to free
-   */
-  memoryFree(offset: number) {
-    return lib.extism_current_plugin_memory_free(this.pointer, offset);
-  }
-
-  /**
-   * Get the length of a memory block
-   * @param offset - The offset of the block
-   * @returns the length of the block specified by `offset`
-   */
-  memoryLength(offset: number): number {
-    return lib.extism_current_plugin_memory_length(this.pointer, offset);
-  }
-
-  /**
-   * Return a string from a host function
-   * @param output - The output to set
-   * @param s - The string to return
-   */
-  returnString(output: typeof Val, s: string) {
-    var offs = this.memoryAlloc(Buffer.byteLength(s));
-    this.memory(offs).write(s);
-    output.v.i64 = offs;
-  }
-
-  /**
-   * Return bytes from a host function
-   * @param output - The output to set
-   * @param b - The buffer to return
-   */
-  returnBytes(output: typeof Val, b: Buffer) {
-    var offs = this.memoryAlloc(b.length);
-    this.memory(offs).fill(b);
-    output.v.i64 = offs;
-  }
-
-  /**
-   * Get bytes from host function parameter
-   * @param input - The input to read
-   */
-  inputBytes(input: typeof Val): Buffer {
-    return this.memory(input.v.i64);
-  }
-
-  /**
-   * Get string from host function parameter
-   * @param input - The input to read
-   */
-  inputString(input: typeof Val): string {
-    return this.memory(input.v.i64).toString();
-  }
-}
-
-/**
- * Allows for the host to define functions that can be called from WebAseembly
- */
-export class HostFunction {
-  callback: any;
-  pointer: Buffer | null;
-  name: string;
-  userData: any[];
-  inputs: typeof ValTypeArray;
-  outputs: typeof ValTypeArray;
-
-  constructor(
-    name: string,
-    inputs: ValType[],
-    outputs: ValType[],
-    f: any,
-    ...userData: any
-  ) {
-    this.userData = userData;
-    this.callback = ffi.Callback(
-      "void",
-      [
-        "void*",
-        ref.refType(Val),
-        "uint64",
-        ref.refType(Val),
-        "uint64",
-        "void*",
-      ],
-      (
-        currentPlugin: Buffer,
-        inputs: Buffer,
-        nInputs: number,
-        outputs: Buffer,
-        nOutputs: number,
-        user_data,
-      ) => {
-        let inputArr = [];
-        let outputArr = [];
-
-        for (var i = 0; i < nInputs; i++) {
-          inputArr.push(Val.get(inputs, i));
-        }
-
-        for (var i = 0; i < nOutputs; i++) {
-          outputArr.push(Val.get(outputs, i));
-        }
-
-        f(
-          new CurrentPlugin(currentPlugin),
-          inputArr,
-          outputArr,
-          ...this.userData,
-        );
-
-        for (var i = 0; i < nOutputs; i++) {
-          Val.set(outputs, i, outputArr[i]);
-        }
-      },
-    );
-    this.name = name;
-    this.inputs = new ValTypeArray(inputs);
-    this.outputs = new ValTypeArray(outputs);
-    this.pointer = lib.extism_function_new(
-      this.name,
-      this.inputs,
-      this.inputs.length,
-      this.outputs,
-      this.outputs.length,
-      this.callback,
-      null,
-      null,
-    );
-    this.userData = userData;
-    functionRegistry.register(this, this.pointer, this.pointer);
-  }
-
-  /**
-   * Set function namespace
-   */
-  setNamespace(name: string) {
-    if (this.pointer !== null) {
-      lib.extism_function_set_namespace(this.pointer, name);
-    }
-  }
-
-  withNamespace(name: string): HostFunction {
-    this.setNamespace(name);
-    return this;
-  }
-
-  /**
-   *  Free a host function - this should be called to cleanup the associated resources
-   */
-  free() {
-    functionRegistry.unregister(this.pointer);
-    if (this.pointer === null) {
-      return;
-    }
-
-    lib.extism_function_free(this.pointer);
-    this.pointer = null;
-  }
-}
-
-/**
- * CancelHandle is used to cancel a running Plugin
- */
-export class CancelHandle {
-  handle: Buffer;
-
-  constructor(handle: Buffer) {
-    this.handle = handle;
-  }
-
-  /**
-   * Cancel execution of the Plugin associated with the CancelHandle
-   */
-  cancel(): boolean {
-    return lib.extism_plugin_cancel(this.handle);
-  }
-}
-
 /**
  * A Plugin represents an instance of your WASM program from the given manifest.
  */
 export class Plugin {
   id: number;
   ctx: Context;
-  functions: typeof PtrArray;
-  token: { id: number; pointer: Buffer };
 
   /**
    * Constructor for a plugin. @see {@link Context#plugin}.
    *
+   * @param ctx - The context to manage this plugin
    * @param manifest - The {@link Manifest}
    * @param wasi - Set to true to enable WASI support
-   * @param functions - An array of {@link HostFunction}
    * @param config - The plugin config
-   * @param ctx - The context to manage this plugin, or null to use a new context
    */
   constructor(
+    ctx: Context,
     manifest: ManifestData,
     wasi: boolean = false,
-    functions: HostFunction[] = [],
-    config?: PluginConfig,
-    ctx: Context | null = null,
+    config?: PluginConfig
   ) {
-    if (ctx == null) {
-      ctx = new Context();
-    }
     let dataRaw: string | Buffer;
     if (Buffer.isBuffer(manifest) || typeof manifest === "string") {
       dataRaw = manifest;
@@ -614,17 +298,11 @@ export class Plugin {
       throw Error(`Unknown manifest type ${typeof manifest}`);
     }
     if (!ctx.pointer) throw Error("No Context set");
-    this.functions = new PtrArray(functions.length);
-    for (var i = 0; i < functions.length; i++) {
-      this.functions[i] = functions[i].pointer;
-    }
     let plugin = lib.extism_plugin_new(
       ctx.pointer,
       dataRaw,
-      Buffer.byteLength(dataRaw, "utf-8"),
-      this.functions,
-      functions.length,
-      wasi,
+      Buffer.byteLength(dataRaw, 'utf-8'),
+      wasi
     );
     if (plugin < 0) {
       var err = lib.extism_error(ctx.pointer, -1);
@@ -634,43 +312,27 @@ export class Plugin {
       throw `Unable to load plugin: ${err.toString()}`;
     }
     this.id = plugin;
-    this.token = { id: this.id, pointer: ctx.pointer };
     this.ctx = ctx;
+    pluginRegistry.register(
+      this,
+      { id: this.id, pointer: this.ctx.pointer },
+      this
+    );
 
     if (config != null) {
       let s = JSON.stringify(config);
-      lib.extism_plugin_config(
-        ctx.pointer,
-        this.id,
-        s,
-        Buffer.byteLength(s, "utf-8"),
-      );
+      lib.extism_plugin_config(ctx.pointer, this.id, s, Buffer.byteLength(s, 'utf-8'),);
     }
   }
 
-  /**
-   * Return a new `CancelHandle`, which can be used to cancel a running Plugin
-   */
-  cancelHandle(): CancelHandle {
-    if (!this.ctx.pointer) throw Error("No Context set");
-    let handle = lib.extism_plugin_cancel_handle(this.ctx.pointer, this.id);
-    return new CancelHandle(handle);
-  }
-
   /**
    * Update an existing plugin with new WASM or manifest
    *
    * @param manifest - The new {@link Manifest} data
    * @param wasi - Set to true to enable WASI support
-   * @param functions - An array of {@link HostFunction}
    * @param config - The new plugin config
    */
-  update(
-    manifest: ManifestData,
-    wasi: boolean = false,
-    functions: HostFunction[] = [],
-    config?: PluginConfig,
-  ) {
+  update(manifest: ManifestData, wasi: boolean = false, config?: PluginConfig) {
     let dataRaw: string | Buffer;
     if (Buffer.isBuffer(manifest) || typeof manifest === "string") {
       dataRaw = manifest;
@@ -680,18 +342,12 @@ export class Plugin {
       throw Error("Unknown manifest type type");
     }
     if (!this.ctx.pointer) throw Error("No Context set");
-    this.functions = new PtrArray(functions.length);
-    for (var i = 0; i < functions.length; i++) {
-      this.functions[i] = functions[i].pointer;
-    }
     const ok = lib.extism_plugin_update(
       this.ctx.pointer,
       this.id,
       dataRaw,
-      Buffer.byteLength(dataRaw, "utf-8"),
-      this.functions,
-      functions.length,
-      wasi,
+      Buffer.byteLength(dataRaw, 'utf-8'),
+      wasi
     );
     if (!ok) {
       var err = lib.extism_error(this.ctx.pointer, -1);
@@ -703,12 +359,7 @@ export class Plugin {
 
     if (config != null) {
       let s = JSON.stringify(config);
-      lib.extism_plugin_config(
-        this.ctx.pointer,
-        this.id,
-        s,
-        Buffer.byteLength(s, "utf-8"),
-      );
+      lib.extism_plugin_config(this.ctx.pointer, this.id, s, Buffer.byteLength(s, 'utf-8'),);
     }
   }
 
@@ -724,7 +375,7 @@ export class Plugin {
     return lib.extism_plugin_function_exists(
       this.ctx.pointer,
       this.id,
-      functionName,
+      functionName
     );
   }
 
@@ -752,7 +403,7 @@ export class Plugin {
         this.id,
         functionName,
         input.toString(),
-        Buffer.byteLength(input, "utf-8"),
+        Buffer.byteLength(input, 'utf-8'),
       );
       if (rc !== 0) {
         var err = lib.extism_error(this.ctx.pointer, this.id);
@@ -766,7 +417,7 @@ export class Plugin {
       var buf = Buffer.from(
         lib.extism_plugin_output_data(this.ctx.pointer, this.id).buffer,
         0,
-        out_len,
+        out_len
       );
       resolve(buf);
     });
@@ -776,7 +427,8 @@ export class Plugin {
    * Free a plugin, this should be called when the plugin is no longer needed
    */
   free() {
-    if (this.ctx.pointer && this.id >= 0) {
+    if (this.ctx.pointer && this.id !== -1) {
+      pluginRegistry.unregister(this);
       lib.extism_plugin_free(this.ctx.pointer, this.id);
       this.id = -1;
     }

node/tests/index.test.ts

@@ -2,23 +2,14 @@ import * as extism from "../src/index";
 import { readFileSync } from "fs";
 import { join } from "path";
 
-function manifest(functions: boolean = false): extism.Manifest {
+function manifest(): extism.Manifest {
   return {
-    wasm: [
-      {
-        path: join(
-          __dirname,
-          functions
-            ? "/../../wasm/code-functions.wasm"
-            : "/../../wasm/code.wasm"
-        ),
-      },
-    ],
+    wasm: [{ path: join(__dirname, "/code.wasm") }],
   };
 }
 
 function wasmBuffer(): Buffer {
-  return readFileSync(join(__dirname, "/../../wasm/code.wasm"));
+  return readFileSync(join(__dirname, "/code.wasm"));
 }
 
 describe("test extism", () => {
@@ -111,27 +102,4 @@ describe("test extism", () => {
       ).rejects.toMatch(/Plugin error/);
     });
   });
-
-  test("host functions work", async () => {
-    await extism.withContext(async (ctx: extism.Context) => {
-      const plugin = ctx.plugin(manifest(true), true, [
-        new extism.HostFunction(
-          "hello_world",
-          [extism.ValType.I64],
-          [extism.ValType.I64],
-          (plugin: any, params: any, results: any, user_data: string) => {
-            const offs = plugin.memoryAlloc(user_data.length);
-            const mem = plugin.memory(offs);
-            mem.write(user_data);
-            results[0].v.i64 = offs;
-          },
-          "test"
-        ),
-      ]);
-
-      const res = await plugin.call("count_vowels", "aaa");
-
-      expect(res.toString()).toBe("test");
-    });
-  });
 });