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// Copyright 2014 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 MOJO_EDK_JS_WAITING_CALLBACK_H_
#define MOJO_EDK_JS_WAITING_CALLBACK_H_
#include "base/memory/weak_ptr.h"
#include "gin/handle.h"
#include "gin/runner.h"
#include "gin/wrappable.h"
#include "mojo/edk/js/handle.h"
#include "mojo/edk/js/handle_close_observer.h"
#include "mojo/public/c/environment/async_waiter.h"
#include "mojo/public/cpp/system/core.h"
namespace mojo {
namespace edk {
class WaitingCallback : public gin::Wrappable<WaitingCallback>,
public HandleCloseObserver {
public:
static gin::WrapperInfo kWrapperInfo;
// Creates a new WaitingCallback.
static gin::Handle<WaitingCallback> Create(
v8::Isolate* isolate,
v8::Handle<v8::Function> callback,
gin::Handle<HandleWrapper> handle_wrapper,
MojoHandleSignals signals);
// Cancels the callback. Does nothing if a callback is not pending. This is
// implicitly invoked from the destructor but can be explicitly invoked as
// necessary.
void Cancel();
private:
WaitingCallback(v8::Isolate* isolate,
v8::Handle<v8::Function> callback,
gin::Handle<HandleWrapper> handle_wrapper);
~WaitingCallback() override;
// Callback from MojoAsyncWaiter. |closure| is the WaitingCallback.
static void CallOnHandleReady(void* closure, MojoResult result);
// Invoked from CallOnHandleReady() (CallOnHandleReady() must be static).
void OnHandleReady(MojoResult result);
// Invoked by the HandleWrapper if the handle is closed while this wait is
// still in progress.
void OnWillCloseHandle() override;
void ClearWaitId();
void CallCallback(MojoResult result);
base::WeakPtr<gin::Runner> runner_;
MojoAsyncWaitID wait_id_;
HandleWrapper* handle_wrapper_;
base::WeakPtrFactory<WaitingCallback> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(WaitingCallback);
};
} // namespace edk
} // namespace mojo
#endif // MOJO_EDK_JS_WAITING_CALLBACK_H_
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