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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ | 5 #ifndef COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ |
6 #define COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ | 6 #define COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/bind.h" | 10 #include "base/bind.h" |
11 #include "base/bind_helpers.h" | 11 #include "base/bind_helpers.h" |
12 #include "base/callback.h" | 12 #include "base/callback.h" |
13 #include "base/location.h" | 13 #include "base/location.h" |
14 #include "base/memory/ref_counted.h" | 14 #include "base/memory/ref_counted.h" |
15 #include "base/memory/scoped_vector.h" | |
16 #include "base/task_runner.h" | 15 #include "base/task_runner.h" |
17 #include "base/threading/thread_task_runner_handle.h" | 16 #include "base/threading/thread_task_runner_handle.h" |
18 | 17 |
19 // This is a helper utility for Bind()ing callbacks to a given TaskRunner. | 18 // This is a helper utility for Bind()ing callbacks to a given TaskRunner. |
20 // The typical use is when |a| (of class |A|) wants to hand a callback such as | 19 // The typical use is when |a| (of class |A|) wants to hand a callback such as |
21 // base::Bind(&A::AMethod, a) to |b|, but needs to ensure that when |b| executes | 20 // base::Bind(&A::AMethod, a) to |b|, but needs to ensure that when |b| executes |
22 // the callback, it does so on a specific TaskRunner (for example, |a|'s current | 21 // the callback, it does so on a specific TaskRunner (for example, |a|'s current |
23 // MessageLoop). | 22 // MessageLoop). |
24 // | 23 // |
25 // Typical usage: request to be called back on the current thread: | 24 // Typical usage: request to be called back on the current thread: |
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41 T& TrampolineForward(T& t) { | 40 T& TrampolineForward(T& t) { |
42 return t; | 41 return t; |
43 } | 42 } |
44 | 43 |
45 template <typename T, typename R> | 44 template <typename T, typename R> |
46 base::internal::PassedWrapper<std::unique_ptr<T, R>> TrampolineForward( | 45 base::internal::PassedWrapper<std::unique_ptr<T, R>> TrampolineForward( |
47 std::unique_ptr<T, R>& p) { | 46 std::unique_ptr<T, R>& p) { |
48 return base::Passed(&p); | 47 return base::Passed(&p); |
49 } | 48 } |
50 | 49 |
51 template <typename T> | |
52 base::internal::PassedWrapper<ScopedVector<T>> TrampolineForward( | |
53 ScopedVector<T>& p) { | |
54 return base::Passed(&p); | |
55 } | |
56 | |
57 template <typename Sig> | 50 template <typename Sig> |
58 struct BindToTaskRunnerTrampoline; | 51 struct BindToTaskRunnerTrampoline; |
59 | 52 |
60 template <> | 53 template <> |
61 struct BindToTaskRunnerTrampoline<void()> { | 54 struct BindToTaskRunnerTrampoline<void()> { |
62 static void Run(const scoped_refptr<base::TaskRunner>& task_runner, | 55 static void Run(const scoped_refptr<base::TaskRunner>& task_runner, |
63 const base::Closure& cb) { | 56 const base::Closure& cb) { |
64 task_runner->PostTask(FROM_HERE, cb); | 57 task_runner->PostTask(FROM_HERE, cb); |
65 } | 58 } |
66 }; | 59 }; |
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86 } | 79 } |
87 | 80 |
88 template <typename T> | 81 template <typename T> |
89 base::Callback<T> BindToCurrentThread(const base::Callback<T>& cb) { | 82 base::Callback<T> BindToCurrentThread(const base::Callback<T>& cb) { |
90 return BindToTaskRunner(base::ThreadTaskRunnerHandle::Get(), cb); | 83 return BindToTaskRunner(base::ThreadTaskRunnerHandle::Get(), cb); |
91 } | 84 } |
92 | 85 |
93 } // namespace syncer | 86 } // namespace syncer |
94 | 87 |
95 #endif // COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ | 88 #endif // COMPONENTS_SYNC_BASE_BIND_TO_TASK_RUNNER_H_ |
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