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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file contains the implementation shared by | 5 // This file contains the implementation shared by |
6 // TaskRunner::PostTaskAndReply and WorkerPool::PostTaskAndReply. | 6 // TaskRunner::PostTaskAndReply and WorkerPool::PostTaskAndReply. |
7 | 7 |
8 #ifndef BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ | 8 #ifndef BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |
9 #define BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ | 9 #define BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |
10 | 10 |
11 #include "base/base_export.h" | 11 #include "base/base_export.h" |
12 #include "base/callback_forward.h" | 12 #include "base/callback.h" |
13 #include "base/location.h" | 13 #include "base/location.h" |
14 | 14 |
15 namespace base { | 15 namespace base { |
16 namespace internal { | 16 namespace internal { |
17 | 17 |
18 // Inherit from this in a class that implements PostTask to send a task to a | 18 // Inherit from this in a class that implements PostTask to send a task to a |
19 // custom execution context. | 19 // custom execution context. |
20 // | 20 // |
21 // If you're looking for a concrete implementation of PostTaskAndReply, you | 21 // If you're looking for a concrete implementation of PostTaskAndReply, you |
22 // probably want base::TaskRunner, or you may want base::WorkerPool. | 22 // probably want base::TaskRunner, or you may want base::WorkerPool. |
23 class BASE_EXPORT PostTaskAndReplyImpl { | 23 class BASE_EXPORT PostTaskAndReplyImpl { |
24 public: | 24 public: |
25 virtual ~PostTaskAndReplyImpl() = default; | 25 virtual ~PostTaskAndReplyImpl() = default; |
26 | 26 |
27 // Posts |task| by calling PostTask(). On completion, |reply| is posted to the | 27 // Posts |task| by calling PostTask(). On completion, |reply| is posted to the |
28 // sequence or thread that called this. Can only be called when | 28 // sequence or thread that called this. Can only be called when |
29 // SequencedTaskRunnerHandle::IsSet(). Both |task| and |reply| are guaranteed | 29 // SequencedTaskRunnerHandle::IsSet(). Both |task| and |reply| are guaranteed |
30 // to be deleted on the sequence or thread that called this. | 30 // to be deleted on the sequence or thread that called this. |
31 bool PostTaskAndReply(const tracked_objects::Location& from_here, | 31 bool PostTaskAndReply(const tracked_objects::Location& from_here, |
32 const Closure& task, | 32 Closure task, |
33 const Closure& reply); | 33 Closure reply); |
34 | 34 |
35 private: | 35 private: |
36 virtual bool PostTask(const tracked_objects::Location& from_here, | 36 virtual bool PostTask(const tracked_objects::Location& from_here, |
37 const Closure& task) = 0; | 37 const Closure& task) = 0; |
38 }; | 38 }; |
39 | 39 |
40 } // namespace internal | 40 } // namespace internal |
41 } // namespace base | 41 } // namespace base |
42 | 42 |
43 #endif // BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ | 43 #endif // BASE_THREADING_POST_TASK_AND_REPLY_IMPL_H_ |
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