isolates: have node::Isolate manage the v8::Context

src/node_isolate.cc

@@ -47,6 +47,9 @@ Isolate::Isolate(uv_loop_t* loop) {
   assert(v8_isolate_->GetData() == NULL);
   v8_isolate_->SetData(this);
 
+  v8_context_ = v8::Context::New();
+  v8_context_->Enter();
+
   globals_init(&globals_);
 }
 
@@ -77,6 +80,15 @@ void Isolate::Dispose() {
     it->callback_(it->arg_);
     delete it;
   }
+
+  assert(v8_context_->InContext());
+  v8_context_->Exit();
+  v8_context_.Clear();
+  v8_context_.Dispose();
+
+  v8_isolate_->Exit();
+  v8_isolate_->Dispose();
+  v8_isolate_ = NULL;
 }
 
 

src/node_isolate.h

@@ -62,6 +62,11 @@ public:
     return v8_isolate_;
   }
 
+  v8::Handle<v8::Context> GetV8Context() {
+    NODE_ISOLATE_CHECK(this);
+    return v8_context_;
+  }
+
   /* Register a handler that should run when the current isolate exits.
    * Handlers run in LIFO order.
    */
@@ -82,6 +87,7 @@ private:
   };
 
   SLIST_HEAD(AtExitCallbacks, AtExitCallbackInfo) at_exit_callbacks_;
+  v8::Persistent<v8::Context> v8_context_;
   v8::Isolate* v8_isolate_;
   uv_loop_t* loop_;