1// Copyright (c) 2011 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// This file contains the implementation shared by
6// TaskRunner::PostTaskAndReply and WorkerPool::PostTaskAndReply.
7
8#ifndef BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_
9#define BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_
10
11#include "base/callback_forward.h"
12#include "base/location.h"
13
14namespace base {
15namespace internal {
16
17// Inherit from this in a class that implements PostTask appropriately
18// for sending to a destination thread.
19//
20// Note that 'reply' will always get posted back to your current
21// MessageLoop.
22//
23// If you're looking for a concrete implementation of
24// PostTaskAndReply, you probably want base::SingleThreadTaskRunner, or you
25// may want base::WorkerPool.
26class PostTaskAndReplyImpl {
27 public:
28  virtual ~PostTaskAndReplyImpl() = default;
29
30  // Implementation for TaskRunner::PostTaskAndReply and
31  // WorkerPool::PostTaskAndReply.
32  bool PostTaskAndReply(const tracked_objects::Location& from_here,
33                        const Closure& task,
34                        const Closure& reply);
35
36 private:
37  virtual bool PostTask(const tracked_objects::Location& from_here,
38                        const Closure& task) = 0;
39};
40
41}  // namespace internal
42}  // namespace base
43
44#endif  // BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_
45