gin/function_template.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gin/function_template.h"
   6
   7 namespace gin {
   8
   9 namespace internal {
  10
  11 CallbackHolderBase::CallbackHolderBase(v8::Isolate* isolate)
  12     : v8_ref_(isolate, v8::External::New(isolate, this)) {
  13   v8_ref_.SetWeak(this, &CallbackHolderBase::FirstWeakCallback,
  14                   v8::WeakCallbackType::kParameter);
  15 }
  16
  17 CallbackHolderBase::~CallbackHolderBase() {
  18   DCHECK(v8_ref_.IsEmpty());
  19 }
  20
  21 v8::Local<v8::External> CallbackHolderBase::GetHandle(v8::Isolate* isolate) {
  22   return v8::Local<v8::External>::New(isolate, v8_ref_);
  23 }
  24
  25 // static
  26 void CallbackHolderBase::FirstWeakCallback(
  27     const v8::WeakCallbackInfo<CallbackHolderBase>& data) {
  28   data.GetParameter()->v8_ref_.Reset();
  29   data.SetSecondPassCallback(SecondWeakCallback);
  30 }
  31
  32 // static
  33 void CallbackHolderBase::SecondWeakCallback(
  34     const v8::WeakCallbackInfo<CallbackHolderBase>& data) {
  35   delete data.GetParameter();
  36 }
  37
  38 }  // namespace internal
  39
  40 }  // namespace gin