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[node] switch to NodeRequest member fn callback

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For (hopefully) better performance than creating a new v8::Context to
wrap each callback while still avoiding leaking memory with v8::FunctionTemplate.

Adds a JavaScript shim in front of module.exports.Map to wrap the
req.respond API internally and preserve the public callback-passing
API, while still exporting the correct prototype.
This commit is contained in:
Thiago Marcos P. Santos
2016-06-29 21:35:24 +03:00
committed by Mike Morris
parent d6f667a5e7
commit edec56e6c5
8 changed files with 83 additions and 16 deletions
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14
platform/node/src/node_request.cpp
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@@ -32,6 +32,8 @@ NAN_MODULE_INIT(NodeRequest::Init) {
tpl->InstanceTemplate()->SetInternalFieldCount(1);
tpl->SetClassName(Nan::New("Request").ToLocalChecked());
Nan::SetPrototypeMethod(tpl, "respond", HandleCallback);
constructor.Reset(tpl->GetFunction());
// TODO: Remove this from the public JavaScript API
@@ -49,8 +51,9 @@ void NodeRequest::New(const Nan::FunctionCallbackInfo<v8::Value>& info) {
}
void NodeRequest::HandleCallback(const Nan::FunctionCallbackInfo<v8::Value>& info) {
auto request = Nan::ObjectWrap::Unwrap<NodeRequest>(info.Holder());
// Move out of the object so callback() can only be fired once.
auto request = Nan::ObjectWrap::Unwrap<NodeRequest>(info.Data().As<v8::Object>());
auto callback = std::move(request->callback);
if (!callback) {
return info.GetReturnValue().SetUndefined();
@@ -122,14 +125,9 @@ void NodeRequest::HandleCallback(const Nan::FunctionCallbackInfo<v8::Value>& inf
}
void NodeRequest::Execute() {
// Enter a new v8::Context to avoid leaking v8::FunctionTemplate
// from Nan::New<v8::Function>
v8::Local<v8::Context> context = v8::Context::New(v8::Isolate::GetCurrent());
v8::Context::Scope scope(context);
v8::Local<v8::Value> argv[] = { handle() };
v8::Local<v8::Value> argv[] = { handle(), Nan::New<v8::Function>(NodeRequest::HandleCallback, handle()) };
Nan::MakeCallback(Nan::To<v8::Object>(target->handle()->GetInternalField(1)).ToLocalChecked(), "request", 2, argv);
Nan::MakeCallback(Nan::To<v8::Object>(target->handle()->GetInternalField(1)).ToLocalChecked(), "request", 1, argv);
}
NodeRequest::NodeAsyncRequest::NodeAsyncRequest(NodeRequest* request_) : request(request_) {