task_runners.h revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7 
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#ifndef MOJO_SHELL_TASK_RUNNERS_H_
6#define MOJO_SHELL_TASK_RUNNERS_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "base/message_loop/message_loop_proxy.h"
10#include "base/threading/thread.h"
11
12namespace mojo {
13namespace shell {
14
15// A context object that contains the common task runners for the shell
16class TaskRunners {
17 public:
18  explicit TaskRunners(base::SingleThreadTaskRunner* ui_runner);
19  ~TaskRunners();
20
21  base::SingleThreadTaskRunner* ui_runner() const {
22    return ui_runner_.get();
23  }
24
25  base::SingleThreadTaskRunner* io_runner() const {
26    return io_thread_->message_loop_proxy();
27  }
28
29  base::SingleThreadTaskRunner* file_runner() const {
30    return file_thread_->message_loop_proxy();
31  }
32
33  base::MessageLoopProxy* cache_runner() const {
34    return cache_thread_->message_loop_proxy();
35  }
36
37 private:
38  // TODO(beng): should this be named shell_runner_?
39  scoped_refptr<base::SingleThreadTaskRunner> ui_runner_;
40  scoped_ptr<base::Thread> cache_thread_;
41  scoped_ptr<base::Thread> io_thread_;
42  scoped_ptr<base::Thread> file_thread_;
43
44  DISALLOW_COPY_AND_ASSIGN(TaskRunners);
45};
46
47}  // namespace shell
48}  // namespace mojo
49
50#endif  // MOJO_SHELL_TASK_RUNNERS_H_
51