1 // This file was GENERATED by command: 2 // pump.py callback_helper.h.pump 3 // DO NOT EDIT BY HAND!!! 4 5 6 // Copyright 2014 The Chromium Authors. All rights reserved. 7 // Use of this source code is governed by a BSD-style license that can be 8 // found in the LICENSE file. 9 10 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_ 11 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_ 12 13 #include "base/bind.h" 14 #include "base/location.h" 15 #include "base/logging.h" 16 #include "base/sequenced_task_runner.h" 17 #include "base/thread_task_runner_handle.h" 18 19 // TODO(tzik): Merge this file to media/base/bind_to_current_loop.h. 20 21 namespace sync_file_system { 22 namespace drive_backend { 23 24 namespace internal { 25 26 template <typename T> 27 typename base::enable_if< 28 base::internal::IsMoveOnlyType<T>::value, 29 base::internal::PassedWrapper<T> >::type 30 RebindForward(T& t) { 31 return base::Passed(&t); 32 } 33 34 template <typename T> 35 typename base::enable_if< 36 !base::internal::IsMoveOnlyType<T>::value, 37 T&>::type 38 RebindForward(T& t) { 39 return t; 40 } 41 42 template <typename T> 43 class CallbackHolder { 44 public: 45 CallbackHolder(base::SequencedTaskRunner* task_runner, 46 const tracked_objects::Location& from_here, 47 const base::Callback<T>& callback) 48 : task_runner_(task_runner), 49 from_here_(from_here), 50 callback_(new base::Callback<T>(callback)) { 51 DCHECK(task_runner_); 52 } 53 54 ~CallbackHolder() { 55 base::Callback<T>* callback = callback_.release(); 56 if (!task_runner_->DeleteSoon(from_here_, callback)) 57 delete callback; 58 } 59 60 base::SequencedTaskRunner* task_runner() const { return task_runner_; } 61 const tracked_objects::Location& from_here() const { return from_here_; } 62 const base::Callback<T>& callback() const { return *callback_; } 63 64 private: 65 scoped_refptr<base::SequencedTaskRunner> task_runner_; 66 const tracked_objects::Location from_here_; 67 scoped_ptr<base::Callback<T> > callback_; 68 69 DISALLOW_COPY_AND_ASSIGN(CallbackHolder); 70 }; 71 72 template <typename> 73 struct RelayToTaskRunnerHelper; 74 75 template <> 76 struct RelayToTaskRunnerHelper<void()> { 77 static void Run(CallbackHolder<void()>* holder) { 78 holder->task_runner()->PostTask( 79 holder->from_here(), base::Bind(holder->callback())); 80 } 81 }; 82 83 template <typename A1> 84 struct RelayToTaskRunnerHelper<void(A1)> { 85 static void Run(CallbackHolder<void(A1)>* holder, A1 a1) { 86 holder->task_runner()->PostTask( 87 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1))); 88 } 89 }; 90 91 template <typename A1, typename A2> 92 struct RelayToTaskRunnerHelper<void(A1, A2)> { 93 static void Run(CallbackHolder<void(A1, A2)>* holder, A1 a1, A2 a2) { 94 holder->task_runner()->PostTask( 95 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 96 RebindForward(a2))); 97 } 98 }; 99 100 template <typename A1, typename A2, typename A3> 101 struct RelayToTaskRunnerHelper<void(A1, A2, A3)> { 102 static void Run(CallbackHolder<void(A1, A2, A3)>* holder, A1 a1, A2 a2, 103 A3 a3) { 104 holder->task_runner()->PostTask( 105 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 106 RebindForward(a2), RebindForward(a3))); 107 } 108 }; 109 110 template <typename A1, typename A2, typename A3, typename A4> 111 struct RelayToTaskRunnerHelper<void(A1, A2, A3, A4)> { 112 static void Run(CallbackHolder<void(A1, A2, A3, A4)>* holder, A1 a1, A2 a2, 113 A3 a3, A4 a4) { 114 holder->task_runner()->PostTask( 115 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 116 RebindForward(a2), RebindForward(a3), RebindForward(a4))); 117 } 118 }; 119 120 template <typename A1, typename A2, typename A3, typename A4, typename A5> 121 struct RelayToTaskRunnerHelper<void(A1, A2, A3, A4, A5)> { 122 static void Run(CallbackHolder<void(A1, A2, A3, A4, A5)>* holder, A1 a1, 123 A2 a2, A3 a3, A4 a4, A5 a5) { 124 holder->task_runner()->PostTask( 125 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 126 RebindForward(a2), RebindForward(a3), RebindForward(a4), 127 RebindForward(a5))); 128 } 129 }; 130 131 template <typename A1, typename A2, typename A3, typename A4, typename A5, 132 typename A6> 133 struct RelayToTaskRunnerHelper<void(A1, A2, A3, A4, A5, A6)> { 134 static void Run(CallbackHolder<void(A1, A2, A3, A4, A5, A6)>* holder, A1 a1, 135 A2 a2, A3 a3, A4 a4, A5 a5, A6 a6) { 136 holder->task_runner()->PostTask( 137 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 138 RebindForward(a2), RebindForward(a3), RebindForward(a4), 139 RebindForward(a5), RebindForward(a6))); 140 } 141 }; 142 143 template <typename A1, typename A2, typename A3, typename A4, typename A5, 144 typename A6, typename A7> 145 struct RelayToTaskRunnerHelper<void(A1, A2, A3, A4, A5, A6, A7)> { 146 static void Run(CallbackHolder<void(A1, A2, A3, A4, A5, A6, A7)>* holder, 147 A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7) { 148 holder->task_runner()->PostTask( 149 holder->from_here(), base::Bind(holder->callback(), RebindForward(a1), 150 RebindForward(a2), RebindForward(a3), RebindForward(a4), 151 RebindForward(a5), RebindForward(a6), RebindForward(a7))); 152 } 153 }; 154 155 } // namespace internal 156 157 template <typename T> 158 base::Callback<T> RelayCallbackToTaskRunner( 159 base::SequencedTaskRunner* task_runner, 160 const tracked_objects::Location& from_here, 161 const base::Callback<T>& callback) { 162 DCHECK(task_runner->RunsTasksOnCurrentThread()); 163 164 if (callback.is_null()) 165 return base::Callback<T>(); 166 167 return base::Bind(&internal::RelayToTaskRunnerHelper<T>::Run, 168 base::Owned(new internal::CallbackHolder<T>( 169 task_runner, from_here, callback))); 170 } 171 172 template <typename T> 173 base::Callback<T> RelayCallbackToCurrentThread( 174 const tracked_objects::Location& from_here, 175 const base::Callback<T>& callback) { 176 return RelayCallbackToTaskRunner( 177 base::ThreadTaskRunnerHandle::Get(), 178 from_here, callback); 179 } 180 181 } // namespace drive_backend 182 } // namespace sync_file_system 183 184 #endif // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_ 185
