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cleanup: host takes ownership of memory blocks it gets as arguments (#743)

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This PR changes the host to take ownership of memory blocks passed into
Extism host functions, see:
https://github.com/extism/js-sdk/pull/71#issuecomment-2233687933
This commit is contained in:
zach
2024-09-23 10:42:45 -07:00
committed by GitHub
parent 8222164eca
commit 3ac3d9abcf
3 changed files with 51 additions and 8 deletions
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6
kernel/src/lib.rs
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@@ -495,6 +495,8 @@ pub unsafe fn store_u64(p: Pointer, x: u64) {
/// Set the range of the input data in memory
/// h must always be a handle so that length works on it
/// len must match length(handle)
/// **Note**: this function takes ownership of the handle passed in
/// the caller should not `free` this value
#[no_mangle]
pub unsafe fn input_set(h: Handle, len: u64) {
let root = MemoryRoot::new();
@@ -509,6 +511,8 @@ pub unsafe fn input_set(h: Handle, len: u64) {
}
/// Set the range of the output data in memory
/// **Note**: this function takes ownership of the handle passed in
/// the caller should not `free` this value
#[no_mangle]
pub unsafe fn output_set(p: Pointer, len: u64) {
let root = MemoryRoot::new();
@@ -554,6 +558,8 @@ pub unsafe fn reset() {
/// Set the error message offset, the handle passed to this
/// function should not be freed after this call
/// **Note**: this function takes ownership of the handle passed in
/// the caller should not `free` this value
#[no_mangle]
pub unsafe fn error_set(h: Handle) {
let root = MemoryRoot::new();