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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 // Multi-threaded tests of ConditionVariable class. | 5 // Multi-threaded tests of ConditionVariable class. | 
| 6 | 6 | 
|  | 7 #include "base/synchronization/condition_variable.h" | 
|  | 8 | 
| 7 #include <time.h> | 9 #include <time.h> | 
|  | 10 | 
| 8 #include <algorithm> | 11 #include <algorithm> | 
|  | 12 #include <memory> | 
| 9 #include <vector> | 13 #include <vector> | 
| 10 | 14 | 
| 11 #include "base/bind.h" | 15 #include "base/bind.h" | 
| 12 #include "base/location.h" | 16 #include "base/location.h" | 
| 13 #include "base/logging.h" | 17 #include "base/logging.h" | 
| 14 #include "base/memory/scoped_ptr.h" |  | 
| 15 #include "base/single_thread_task_runner.h" | 18 #include "base/single_thread_task_runner.h" | 
| 16 #include "base/synchronization/condition_variable.h" |  | 
| 17 #include "base/synchronization/lock.h" | 19 #include "base/synchronization/lock.h" | 
| 18 #include "base/synchronization/spin_wait.h" | 20 #include "base/synchronization/spin_wait.h" | 
| 19 #include "base/threading/platform_thread.h" | 21 #include "base/threading/platform_thread.h" | 
| 20 #include "base/threading/thread.h" | 22 #include "base/threading/thread.h" | 
| 21 #include "base/threading/thread_collision_warner.h" | 23 #include "base/threading/thread_collision_warner.h" | 
| 22 #include "base/time/time.h" | 24 #include "base/time/time.h" | 
| 23 #include "build/build_config.h" | 25 #include "build/build_config.h" | 
| 24 #include "testing/gtest/include/gtest/gtest.h" | 26 #include "testing/gtest/include/gtest/gtest.h" | 
| 25 #include "testing/platform_test.h" | 27 #include "testing/platform_test.h" | 
| 26 | 28 | 
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| 126   // Both worker threads and controller use the following to synchronize. | 128   // Both worker threads and controller use the following to synchronize. | 
| 127   Lock lock_; | 129   Lock lock_; | 
| 128   ConditionVariable work_is_available_;  // To tell threads there is work. | 130   ConditionVariable work_is_available_;  // To tell threads there is work. | 
| 129 | 131 | 
| 130   // Conditions to notify the controlling process (if it is interested). | 132   // Conditions to notify the controlling process (if it is interested). | 
| 131   ConditionVariable all_threads_have_ids_;  // All threads are running. | 133   ConditionVariable all_threads_have_ids_;  // All threads are running. | 
| 132   ConditionVariable no_more_tasks_;  // Task count is zero. | 134   ConditionVariable no_more_tasks_;  // Task count is zero. | 
| 133 | 135 | 
| 134   const int thread_count_; | 136   const int thread_count_; | 
| 135   int waiting_thread_count_; | 137   int waiting_thread_count_; | 
| 136   scoped_ptr<PlatformThreadHandle[]> thread_handles_; | 138   std::unique_ptr<PlatformThreadHandle[]> thread_handles_; | 
| 137   std::vector<int> assignment_history_;  // Number of assignment per worker. | 139   std::vector<int> assignment_history_;  // Number of assignment per worker. | 
| 138   std::vector<int> completion_history_;  // Number of completions per worker. | 140   std::vector<int> completion_history_;  // Number of completions per worker. | 
| 139   int thread_started_counter_;  // Used to issue unique id to workers. | 141   int thread_started_counter_;  // Used to issue unique id to workers. | 
| 140   int shutdown_task_count_;  // Number of tasks told to shutdown | 142   int shutdown_task_count_;  // Number of tasks told to shutdown | 
| 141   int task_count_;  // Number of assignment tasks waiting to be processed. | 143   int task_count_;  // Number of assignment tasks waiting to be processed. | 
| 142   TimeDelta worker_delay_;  // Time each task takes to complete. | 144   TimeDelta worker_delay_;  // Time each task takes to complete. | 
| 143   bool allow_help_requests_;  // Workers can signal more workers. | 145   bool allow_help_requests_;  // Workers can signal more workers. | 
| 144   bool shutdown_;  // Set when threads need to terminate. | 146   bool shutdown_;  // Set when threads need to terminate. | 
| 145 | 147 | 
| 146   DFAKE_MUTEX(locked_methods_); | 148   DFAKE_MUTEX(locked_methods_); | 
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| 757       base::AutoLock auto_lock(lock_); | 759       base::AutoLock auto_lock(lock_); | 
| 758       // Send notification that we completed our "work." | 760       // Send notification that we completed our "work." | 
| 759       WorkIsCompleted(thread_id); | 761       WorkIsCompleted(thread_id); | 
| 760     } | 762     } | 
| 761   } | 763   } | 
| 762 } | 764 } | 
| 763 | 765 | 
| 764 }  // namespace | 766 }  // namespace | 
| 765 | 767 | 
| 766 }  // namespace base | 768 }  // namespace base | 
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