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