Domain hooks in ReqWrap<T> and MakeCallback

src/node.cc

@@ -109,6 +109,11 @@ static Persistent<String> listeners_symbol;
 static Persistent<String> uncaught_exception_symbol;
 static Persistent<String> emit_symbol;
 
+static Persistent<String> domain_symbol;
+static Persistent<String> enter_symbol;
+static Persistent<String> exit_symbol;
+static Persistent<String> disposed_symbol;
+
 
 static bool print_eval = false;
 static bool force_repl = false;
@@ -1017,10 +1022,47 @@ MakeCallback(const Handle<Object> object,
 
   TryCatch try_catch;
 
+  if (domain_symbol.IsEmpty()) {
+    domain_symbol = NODE_PSYMBOL("domain");
+    enter_symbol = NODE_PSYMBOL("enter");
+    exit_symbol = NODE_PSYMBOL("exit");
+    disposed_symbol = NODE_PSYMBOL("_disposed");
+  }
+
+  Local<Value> domain_v = object->Get(domain_symbol);
+  Local<Object> domain;
+  Local<Function> enter;
+  Local<Function> exit;
+  if (!domain_v->IsUndefined()) {
+    domain = domain_v->ToObject();
+    if (domain->Get(disposed_symbol)->BooleanValue()) {
+      // domain has been disposed of.
+      return Undefined();
+    }
+    enter = Local<Function>::Cast(domain->Get(enter_symbol));
+    enter->Call(domain, 0, NULL);
+  }
+
+  if (try_catch.HasCaught()) {
+    FatalException(try_catch);
+    return Undefined();
+  }
+
   Local<Value> ret = callback->Call(object, argc, argv);
 
   if (try_catch.HasCaught()) {
     FatalException(try_catch);
+    return Undefined();
+  }
+
+  if (!domain_v->IsUndefined()) {
+    exit = Local<Function>::Cast(domain->Get(exit_symbol));
+    exit->Call(domain, 0, NULL);
+  }
+
+  if (try_catch.HasCaught()) {
+    FatalException(try_catch);
+    return Undefined();
   }
 
   return scope.Close(ret);

src/node.js

@@ -238,7 +238,10 @@
         for (var i = 0; i < l; i++) {
           var tock = q[i];
           var callback = tock.callback;
-          if (tock.domain) tock.domain.enter();
+          if (tock.domain) {
+            if (tock.domain._disposed) continue;
+            tock.domain.enter();
+          }
           callback();
           if (tock.domain) tock.domain.exit();
         }

src/req_wrap.h

@@ -24,14 +24,35 @@
 
 namespace node {
 
+static v8::Persistent<v8::String> process_symbol;
+static v8::Persistent<v8::String> domain_symbol;
+
 template <typename T>
 class ReqWrap {
  public:
   ReqWrap() {
     v8::HandleScope scope;
     object_ = v8::Persistent<v8::Object>::New(v8::Object::New());
+
+    // TODO: grab a handle to the current process.domain
+    if (process_symbol.IsEmpty()) {
+      process_symbol = NODE_PSYMBOL("process");
+      domain_symbol = NODE_PSYMBOL("domain");
+    }
+
+    v8::Local<v8::Value> domain = v8::Context::GetCurrent()
+                                  ->Global()
+                                  ->Get(process_symbol)
+                                  ->ToObject()
+                                  ->Get(domain_symbol);
+
+    if (!domain->IsUndefined()) {
+      // fprintf(stderr, "setting domain on ReqWrap\n");
+      object_->Set(domain_symbol, domain);
+    }
   }
 
+
   ~ReqWrap() {
     // Assert that someone has called Dispatched()
     assert(req_.data == this);