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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef BASE_TASK_RUNNER_UTIL_H_ | 5 #ifndef BASE_TASK_RUNNER_UTIL_H_ |
6 #define BASE_TASK_RUNNER_UTIL_H_ | 6 #define BASE_TASK_RUNNER_UTIL_H_ |
7 | 7 |
8 #include "base/bind.h" | 8 #include "base/bind.h" |
9 #include "base/bind_helpers.h" | 9 #include "base/bind_helpers.h" |
10 #include "base/callback_internal.h" | 10 #include "base/callback_internal.h" |
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40 // When you have these methods | 40 // When you have these methods |
41 // | 41 // |
42 // R DoWorkAndReturn(); | 42 // R DoWorkAndReturn(); |
43 // void Callback(const R& result); | 43 // void Callback(const R& result); |
44 // | 44 // |
45 // and want to call them in a PostTaskAndReply kind of fashion where the | 45 // and want to call them in a PostTaskAndReply kind of fashion where the |
46 // result of DoWorkAndReturn is passed to the Callback, you can use | 46 // result of DoWorkAndReturn is passed to the Callback, you can use |
47 // PostTaskAndReplyWithResult as in this example: | 47 // PostTaskAndReplyWithResult as in this example: |
48 // | 48 // |
49 // PostTaskAndReplyWithResult( | 49 // PostTaskAndReplyWithResult( |
50 // target_thread_.message_loop_proxy(), | 50 // target_thread_.task_runner(), |
51 // FROM_HERE, | 51 // FROM_HERE, |
52 // Bind(&DoWorkAndReturn), | 52 // Bind(&DoWorkAndReturn), |
53 // Bind(&Callback)); | 53 // Bind(&Callback)); |
54 template <typename TaskReturnType, typename ReplyArgType> | 54 template <typename TaskReturnType, typename ReplyArgType> |
55 bool PostTaskAndReplyWithResult( | 55 bool PostTaskAndReplyWithResult( |
56 TaskRunner* task_runner, | 56 TaskRunner* task_runner, |
57 const tracked_objects::Location& from_here, | 57 const tracked_objects::Location& from_here, |
58 const Callback<TaskReturnType(void)>& task, | 58 const Callback<TaskReturnType(void)>& task, |
59 const Callback<void(ReplyArgType)>& reply) { | 59 const Callback<void(ReplyArgType)>& reply) { |
60 TaskReturnType* result = new TaskReturnType(); | 60 TaskReturnType* result = new TaskReturnType(); |
61 return task_runner->PostTaskAndReply( | 61 return task_runner->PostTaskAndReply( |
62 from_here, | 62 from_here, |
63 base::Bind(&internal::ReturnAsParamAdapter<TaskReturnType>, task, | 63 base::Bind(&internal::ReturnAsParamAdapter<TaskReturnType>, task, |
64 result), | 64 result), |
65 base::Bind(&internal::ReplyAdapter<TaskReturnType, ReplyArgType>, reply, | 65 base::Bind(&internal::ReplyAdapter<TaskReturnType, ReplyArgType>, reply, |
66 base::Owned(result))); | 66 base::Owned(result))); |
67 } | 67 } |
68 | 68 |
69 } // namespace base | 69 } // namespace base |
70 | 70 |
71 #endif // BASE_TASK_RUNNER_UTIL_H_ | 71 #endif // BASE_TASK_RUNNER_UTIL_H_ |
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