| // Copyright (c) 2011 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. |
| |
| // This file contains the implementation shared by |
| // TaskRunner::PostTaskAndReply and WorkerPool::PostTaskAndReply. |
| |
| #ifndef BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |
| #define BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |
| |
| #include "base/base_export.h" |
| #include "base/callback.h" |
| #include "base/location.h" |
| |
| namespace base { |
| namespace internal { |
| |
| // Inherit from this in a class that implements PostTask to send a task to a |
| // custom execution context. |
| // |
| // If you're looking for a concrete implementation of PostTaskAndReply, you |
| // probably want base::TaskRunner, or you may want base::WorkerPool. |
| class BASE_EXPORT PostTaskAndReplyImpl { |
| public: |
| virtual ~PostTaskAndReplyImpl() = default; |
| |
| // Posts |task| by calling PostTask(). On completion, |reply| is posted to the |
| // sequence or thread that called this. Can only be called when |
| // SequencedTaskRunnerHandle::IsSet(). Both |task| and |reply| are guaranteed |
| // to be deleted on the sequence or thread that called this. |
| bool PostTaskAndReply(const tracked_objects::Location& from_here, |
| OnceClosure task, |
| OnceClosure reply); |
| |
| private: |
| virtual bool PostTask(const tracked_objects::Location& from_here, |
| OnceClosure task) = 0; |
| }; |
| |
| } // namespace internal |
| } // namespace base |
| |
| #endif // BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |