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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 #include "base/task_scheduler/task_scheduler_impl.h" | 5 #include "base/task_scheduler/task_scheduler_impl.h" |
6 | 6 |
7 #include <utility> | 7 #include <utility> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/bind_helpers.h" | 10 #include "base/bind_helpers.h" |
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82 re_enqueue_sequence_callback = | 82 re_enqueue_sequence_callback = |
83 Bind(&TaskSchedulerImpl::ReEnqueueSequenceCallback, Unretained(this)); | 83 Bind(&TaskSchedulerImpl::ReEnqueueSequenceCallback, Unretained(this)); |
84 | 84 |
85 // TODO(fdoray): Derive the number of threads per pool from hardware | 85 // TODO(fdoray): Derive the number of threads per pool from hardware |
86 // characteristics rather than using hard-coded constants. | 86 // characteristics rather than using hard-coded constants. |
87 | 87 |
88 // Passing pointers to objects owned by |this| to | 88 // Passing pointers to objects owned by |this| to |
89 // SchedulerThreadPoolImpl::Create() is safe because a TaskSchedulerImpl can't | 89 // SchedulerThreadPoolImpl::Create() is safe because a TaskSchedulerImpl can't |
90 // be deleted before all its thread pools have been joined. | 90 // be deleted before all its thread pools have been joined. |
91 background_thread_pool_ = SchedulerThreadPoolImpl::Create( | 91 background_thread_pool_ = SchedulerThreadPoolImpl::Create( |
92 "TaskSchedulerBackground", ThreadPriority::BACKGROUND, 1U, | 92 ThreadPriority::BACKGROUND, 1U, IORestriction::DISALLOWED, |
93 IORestriction::DISALLOWED, re_enqueue_sequence_callback, &task_tracker_, | 93 re_enqueue_sequence_callback, &task_tracker_, &delayed_task_manager_); |
94 &delayed_task_manager_); | |
95 CHECK(background_thread_pool_); | 94 CHECK(background_thread_pool_); |
96 | 95 |
97 background_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( | 96 background_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( |
98 "TaskSchedulerBackgroundFileIO", ThreadPriority::BACKGROUND, 1U, | 97 ThreadPriority::BACKGROUND, 1U, IORestriction::ALLOWED, |
99 IORestriction::ALLOWED, re_enqueue_sequence_callback, &task_tracker_, | 98 re_enqueue_sequence_callback, &task_tracker_, &delayed_task_manager_); |
100 &delayed_task_manager_); | |
101 CHECK(background_file_io_thread_pool_); | 99 CHECK(background_file_io_thread_pool_); |
102 | 100 |
103 normal_thread_pool_ = SchedulerThreadPoolImpl::Create( | 101 normal_thread_pool_ = SchedulerThreadPoolImpl::Create( |
104 "TaskSchedulerForeground", ThreadPriority::NORMAL, 4U, | 102 ThreadPriority::NORMAL, 4U, IORestriction::DISALLOWED, |
105 IORestriction::DISALLOWED, re_enqueue_sequence_callback, &task_tracker_, | 103 re_enqueue_sequence_callback, &task_tracker_, &delayed_task_manager_); |
106 &delayed_task_manager_); | |
107 CHECK(normal_thread_pool_); | 104 CHECK(normal_thread_pool_); |
108 | 105 |
109 normal_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( | 106 normal_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( |
110 "TaskSchedulerForegroundFileIO", ThreadPriority::NORMAL, 12U, | 107 ThreadPriority::NORMAL, 12U, IORestriction::ALLOWED, |
111 IORestriction::ALLOWED, re_enqueue_sequence_callback, &task_tracker_, | 108 re_enqueue_sequence_callback, &task_tracker_, &delayed_task_manager_); |
112 &delayed_task_manager_); | |
113 CHECK(normal_file_io_thread_pool_); | 109 CHECK(normal_file_io_thread_pool_); |
114 } | 110 } |
115 | 111 |
116 SchedulerThreadPool* TaskSchedulerImpl::GetThreadPoolForTraits( | 112 SchedulerThreadPool* TaskSchedulerImpl::GetThreadPoolForTraits( |
117 const TaskTraits& traits) { | 113 const TaskTraits& traits) { |
118 if (traits.with_file_io()) { | 114 if (traits.with_file_io()) { |
119 if (traits.priority() == TaskPriority::BACKGROUND) | 115 if (traits.priority() == TaskPriority::BACKGROUND) |
120 return background_file_io_thread_pool_.get(); | 116 return background_file_io_thread_pool_.get(); |
121 return normal_file_io_thread_pool_.get(); | 117 return normal_file_io_thread_pool_.get(); |
122 } | 118 } |
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137 // with the highest priority in |sequence| as opposed to the next task's | 133 // with the highest priority in |sequence| as opposed to the next task's |
138 // specific priority. | 134 // specific priority. |
139 traits.WithPriority(sort_key.priority()); | 135 traits.WithPriority(sort_key.priority()); |
140 | 136 |
141 GetThreadPoolForTraits(traits)->ReEnqueueSequence(std::move(sequence), | 137 GetThreadPoolForTraits(traits)->ReEnqueueSequence(std::move(sequence), |
142 sort_key); | 138 sort_key); |
143 } | 139 } |
144 | 140 |
145 } // namespace internal | 141 } // namespace internal |
146 } // namespace base | 142 } // namespace base |
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