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| 1 // Copyright (c) 2010 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 // WARNING: You should probably be using Thread (thread.h) instead. Thread is | 5 // WARNING: You should probably be using Thread (thread.h) instead. Thread is |
| 6 // Chrome's message-loop based Thread abstraction, and if you are a | 6 // Chrome's message-loop based Thread abstraction, and if you are a |
| 7 // thread running in the browser, there will likely be assumptions | 7 // thread running in the browser, there will likely be assumptions |
| 8 // that your thread will have an associated message loop. | 8 // that your thread will have an associated message loop. |
| 9 // | 9 // |
| 10 // This is a simple thread interface that backs to a native operating system | 10 // This is a simple thread interface that backs to a native operating system |
| 11 // thread. You should use this only when you want a thread that does not have | 11 // thread. You should use this only when you want a thread that does not have |
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| 75 // Every thread has a name, in the form of |name_prefix|/TID, for example | 75 // Every thread has a name, in the form of |name_prefix|/TID, for example |
| 76 // "my_thread/321". The thread will not be created until Start() is called. | 76 // "my_thread/321". The thread will not be created until Start() is called. |
| 77 explicit SimpleThread(const std::string& name_prefix); | 77 explicit SimpleThread(const std::string& name_prefix); |
| 78 SimpleThread(const std::string& name_prefix, const Options& options); | 78 SimpleThread(const std::string& name_prefix, const Options& options); |
| 79 | 79 |
| 80 virtual ~SimpleThread(); | 80 virtual ~SimpleThread(); |
| 81 | 81 |
| 82 virtual void Start(); | 82 virtual void Start(); |
| 83 virtual void Join(); | 83 virtual void Join(); |
| 84 | 84 |
| 85 // We follow the PlatformThread Delegate interface. | |
| 86 virtual void ThreadMain(); | |
| 87 | |
| 88 // Subclasses should override the Run method. | 85 // Subclasses should override the Run method. |
| 89 virtual void Run() = 0; | 86 virtual void Run() = 0; |
| 90 | 87 |
| 91 // Return the thread name prefix, or "unnamed" if none was supplied. | 88 // Return the thread name prefix, or "unnamed" if none was supplied. |
| 92 std::string name_prefix() { return name_prefix_; } | 89 std::string name_prefix() { return name_prefix_; } |
| 93 | 90 |
| 94 // Return the completed name including TID, only valid after Start(). | 91 // Return the completed name including TID, only valid after Start(). |
| 95 std::string name() { return name_; } | 92 std::string name() { return name_; } |
| 96 | 93 |
| 97 // Return the thread id, only valid after Start(). | 94 // Return the thread id, only valid after Start(). |
| 98 PlatformThreadId tid() { return tid_; } | 95 PlatformThreadId tid() { return tid_; } |
| 99 | 96 |
| 100 // Return True if Start() has ever been called. | 97 // Return True if Start() has ever been called. |
| 101 bool HasBeenStarted() { return event_.IsSignaled(); } | 98 bool HasBeenStarted() { return event_.IsSignaled(); } |
| 102 | 99 |
| 103 // Return True if Join() has evern been called. | 100 // Return True if Join() has evern been called. |
| 104 bool HasBeenJoined() { return joined_; } | 101 bool HasBeenJoined() { return joined_; } |
| 105 | 102 |
| 103 // Overridden from PlatformThread::Delegate: |
| 104 virtual void ThreadMain(); |
| 105 |
| 106 private: | 106 private: |
| 107 const std::string name_prefix_; | 107 const std::string name_prefix_; |
| 108 std::string name_; | 108 std::string name_; |
| 109 const Options options_; | 109 const Options options_; |
| 110 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join! | 110 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join! |
| 111 WaitableEvent event_; // Signaled if Start() was ever called. | 111 WaitableEvent event_; // Signaled if Start() was ever called. |
| 112 PlatformThreadId tid_; // The backing thread's id. | 112 PlatformThreadId tid_; // The backing thread's id. |
| 113 bool joined_; // True if Join has been called. | 113 bool joined_; // True if Join has been called. |
| 114 }; | 114 }; |
| 115 | 115 |
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| 173 int num_threads_; | 173 int num_threads_; |
| 174 std::vector<DelegateSimpleThread*> threads_; | 174 std::vector<DelegateSimpleThread*> threads_; |
| 175 std::queue<Delegate*> delegates_; | 175 std::queue<Delegate*> delegates_; |
| 176 Lock lock_; // Locks delegates_ | 176 Lock lock_; // Locks delegates_ |
| 177 WaitableEvent dry_; // Not signaled when there is no work to do. | 177 WaitableEvent dry_; // Not signaled when there is no work to do. |
| 178 }; | 178 }; |
| 179 | 179 |
| 180 } // namespace base | 180 } // namespace base |
| 181 | 181 |
| 182 #endif // BASE_THREADING_SIMPLE_THREAD_H_ | 182 #endif // BASE_THREADING_SIMPLE_THREAD_H_ |
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