1 // Copyright 2016 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 #ifndef BASE_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_
6 #define BASE_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_
7 
8 #include <utility>
9 
10 #include "base/callback.h"
11 
12 namespace base {
13 
14 namespace internal {
15 
16 // Adapts a function that produces a result via a return value to
17 // one that returns via an output parameter.
18 template <typename ReturnType>
ReturnAsParamAdapter(OnceCallback<ReturnType ()> func,ReturnType * result)19 void ReturnAsParamAdapter(OnceCallback<ReturnType()> func, ReturnType* result) {
20   *result = std::move(func).Run();
21 }
22 
23 // Adapts a T* result to a callblack that expects a T.
24 template <typename TaskReturnType, typename ReplyArgType>
ReplyAdapter(OnceCallback<void (ReplyArgType)> callback,TaskReturnType * result)25 void ReplyAdapter(OnceCallback<void(ReplyArgType)> callback,
26                   TaskReturnType* result) {
27   std::move(callback).Run(std::move(*result));
28 }
29 
30 }  // namespace internal
31 
32 }  // namespace base
33 
34 #endif  // BASE_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_
35