OLD | NEW |
1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 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 BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ | 5 #ifndef BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ |
6 #define BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ | 6 #define BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
(...skipping 17 matching lines...) Expand all Loading... |
28 class DelayedTaskManager; | 28 class DelayedTaskManager; |
29 class SchedulerWorker; | 29 class SchedulerWorker; |
30 class TaskTracker; | 30 class TaskTracker; |
31 | 31 |
32 namespace { | 32 namespace { |
33 | 33 |
34 class SchedulerWorkerDelegate; | 34 class SchedulerWorkerDelegate; |
35 | 35 |
36 } // namespace | 36 } // namespace |
37 | 37 |
| 38 // Manages a pool of threads which are each associated with one |
| 39 // SingleThreadTaskRunner. |
| 40 // |
| 41 // No threads are created (and hence no tasks can run) before Start() is called. |
| 42 // |
| 43 // This class is thread-safe. |
38 class BASE_EXPORT SchedulerSingleThreadTaskRunnerManager final { | 44 class BASE_EXPORT SchedulerSingleThreadTaskRunnerManager final { |
39 public: | 45 public: |
40 SchedulerSingleThreadTaskRunnerManager( | 46 SchedulerSingleThreadTaskRunnerManager( |
41 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, | 47 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, |
42 const TaskScheduler::WorkerPoolIndexForTraitsCallback& | 48 const TaskScheduler::WorkerPoolIndexForTraitsCallback& |
43 worker_pool_index_for_traits_callback, | 49 worker_pool_index_for_traits_callback, |
44 TaskTracker* task_tracker, | 50 TaskTracker* task_tracker, |
45 DelayedTaskManager* delayed_task_manager); | 51 DelayedTaskManager* delayed_task_manager); |
46 ~SchedulerSingleThreadTaskRunnerManager(); | 52 ~SchedulerSingleThreadTaskRunnerManager(); |
47 | 53 |
| 54 // Starts threads for existing SingleThreadTaskRunners and allows threads to |
| 55 // be started when SingleThreadTaskRunners are created in the future. |
| 56 void Start(); |
| 57 |
48 scoped_refptr<SingleThreadTaskRunner> CreateSingleThreadTaskRunnerWithTraits( | 58 scoped_refptr<SingleThreadTaskRunner> CreateSingleThreadTaskRunnerWithTraits( |
49 const TaskTraits& traits); | 59 const TaskTraits& traits); |
50 | 60 |
51 #if defined(OS_WIN) | 61 #if defined(OS_WIN) |
52 scoped_refptr<SingleThreadTaskRunner> CreateCOMSTATaskRunnerWithTraits( | 62 scoped_refptr<SingleThreadTaskRunner> CreateCOMSTATaskRunnerWithTraits( |
53 const TaskTraits& traits); | 63 const TaskTraits& traits); |
54 #endif // defined(OS_WIN) | 64 #endif // defined(OS_WIN) |
55 | 65 |
56 void JoinForTesting(); | 66 void JoinForTesting(); |
57 | 67 |
(...skipping 14 matching lines...) Expand all Loading... |
72 const SchedulerWorkerPoolParams& params); | 82 const SchedulerWorkerPoolParams& params); |
73 | 83 |
74 void UnregisterSchedulerWorker(SchedulerWorker* worker); | 84 void UnregisterSchedulerWorker(SchedulerWorker* worker); |
75 | 85 |
76 const std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector_; | 86 const std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector_; |
77 const TaskScheduler::WorkerPoolIndexForTraitsCallback | 87 const TaskScheduler::WorkerPoolIndexForTraitsCallback |
78 worker_pool_index_for_traits_callback_; | 88 worker_pool_index_for_traits_callback_; |
79 TaskTracker* const task_tracker_; | 89 TaskTracker* const task_tracker_; |
80 DelayedTaskManager* const delayed_task_manager_; | 90 DelayedTaskManager* const delayed_task_manager_; |
81 | 91 |
82 // Synchronizes access to |workers_| and |worker_id_|. | 92 // Synchronizes access to |workers_|, |next_worker_id_| and |started_|. |
83 SchedulerLock workers_lock_; | 93 SchedulerLock lock_; |
84 std::vector<scoped_refptr<SchedulerWorker>> workers_; | 94 std::vector<scoped_refptr<SchedulerWorker>> workers_; |
85 int next_worker_id_ = 0; | 95 int next_worker_id_ = 0; |
86 | 96 |
| 97 // Set to true when Start() is called. |
| 98 bool started_ = false; |
| 99 |
87 #if DCHECK_IS_ON() | 100 #if DCHECK_IS_ON() |
88 subtle::Atomic32 workers_unregistered_during_join_ = 0; | 101 subtle::Atomic32 workers_unregistered_during_join_ = 0; |
89 #endif | 102 #endif |
90 | 103 |
91 DISALLOW_COPY_AND_ASSIGN(SchedulerSingleThreadTaskRunnerManager); | 104 DISALLOW_COPY_AND_ASSIGN(SchedulerSingleThreadTaskRunnerManager); |
92 }; | 105 }; |
93 | 106 |
94 } // namespace internal | 107 } // namespace internal |
95 } // namespace base | 108 } // namespace base |
96 | 109 |
97 #endif // BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ | 110 #endif // BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_ |
OLD | NEW |