1// Copyright 2014 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#ifndef DEVICE_SERIAL_ASYNC_WAITER_H_
6#define DEVICE_SERIAL_ASYNC_WAITER_H_
7
8#include "base/callback.h"
9#include "mojo/public/c/environment/async_waiter.h"
10#include "mojo/public/cpp/environment/environment.h"
11#include "mojo/public/cpp/system/handle.h"
12
13namespace device {
14
15// A class that waits until a handle is ready and calls |callback| with the
16// result. If the AsyncWaiter is deleted before the handle is ready, the wait is
17// cancelled and the callback will not be called.
18class AsyncWaiter {
19 public:
20  typedef base::Callback<void(MojoResult)> Callback;
21
22  AsyncWaiter(mojo::Handle handle,
23              MojoHandleSignals signals,
24              const Callback& callback);
25  ~AsyncWaiter();
26
27 private:
28  static void WaitComplete(void* waiter, MojoResult result);
29  void WaitCompleteInternal(MojoResult result);
30
31  const MojoAsyncWaiter* waiter_;
32  MojoAsyncWaitID id_;
33  const Callback callback_;
34
35  DISALLOW_COPY_AND_ASSIGN(AsyncWaiter);
36};
37
38}  // namespace device
39
40#endif  // DEVICE_SERIAL_ASYNC_WAITER_H_
41