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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_RENDERER_GC_CALLBACK_H_
#define EXTENSIONS_RENDERER_GC_CALLBACK_H_
#include <map>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "v8/include/v8.h"
namespace extensions {
class ScriptContext;
// Runs |callback| when v8 garbage collects |object|, or |fallback| if
// |context| is invalidated first. Exactly one of |callback| or |fallback| will
// be called, after which it deletes itself.
class GCCallback {
public:
GCCallback(ScriptContext* context,
const v8::Local<v8::Object>& object,
const v8::Local<v8::Function>& callback,
const base::Closure& fallback);
~GCCallback();
private:
static void OnObjectGC(const v8::WeakCallbackInfo<GCCallback>& data);
void RunCallback();
void OnContextInvalidated();
// The context which owns |object_|.
ScriptContext* context_;
// The object this GCCallback is bound to.
v8::Global<v8::Object> object_;
// The function to run when |object_| is garbage collected.
v8::Global<v8::Function> callback_;
// The function to run if |context_| is invalidated before we have a chance
// to execute |callback_|.
base::Closure fallback_;
base::WeakPtrFactory<GCCallback> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(GCCallback);
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_GC_CALLBACK_H_
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