67 lines
2 KiB
C++
67 lines
2 KiB
C++
// 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/macros.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/public/cpp/system/core.h"
|
|
#include "mojo/public/cpp/system/watcher.h"
|
|
|
|
namespace mojo {
|
|
namespace edk {
|
|
namespace js {
|
|
|
|
class WaitingCallback : public gin::Wrappable<WaitingCallback> {
|
|
public:
|
|
static gin::WrapperInfo kWrapperInfo;
|
|
|
|
// Creates a new WaitingCallback.
|
|
//
|
|
// If |one_shot| is true, the callback will only ever be called at most once.
|
|
// If false, the callback may be called any number of times until the
|
|
// WaitingCallback is explicitly cancelled.
|
|
static gin::Handle<WaitingCallback> Create(
|
|
v8::Isolate* isolate,
|
|
v8::Handle<v8::Function> callback,
|
|
gin::Handle<HandleWrapper> handle_wrapper,
|
|
MojoHandleSignals signals,
|
|
bool one_shot);
|
|
|
|
// 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,
|
|
bool one_shot);
|
|
~WaitingCallback() override;
|
|
|
|
// Callback from the Watcher.
|
|
void OnHandleReady(MojoResult result);
|
|
|
|
// Indicates whether this is a one-shot callback or not. If so, it uses the
|
|
// deprecated HandleWatcher to wait for signals; otherwise it uses the new
|
|
// system Watcher API.
|
|
const bool one_shot_;
|
|
|
|
base::WeakPtr<gin::Runner> runner_;
|
|
Watcher watcher_;
|
|
base::WeakPtrFactory<WaitingCallback> weak_factory_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(WaitingCallback);
|
|
};
|
|
|
|
} // namespace js
|
|
} // namespace edk
|
|
} // namespace mojo
|
|
|
|
#endif // MOJO_EDK_JS_WAITING_CALLBACK_H_
|