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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 #ifndef BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ | 5 #ifndef BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ |
6 #define BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ | 6 #define BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
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47 const SchedulerWorkerPoolParams& | 47 const SchedulerWorkerPoolParams& |
48 foreground_blocking_worker_pool_params_in); | 48 foreground_blocking_worker_pool_params_in); |
49 ~InitParams(); | 49 ~InitParams(); |
50 | 50 |
51 const SchedulerWorkerPoolParams background_worker_pool_params; | 51 const SchedulerWorkerPoolParams background_worker_pool_params; |
52 const SchedulerWorkerPoolParams background_blocking_worker_pool_params; | 52 const SchedulerWorkerPoolParams background_blocking_worker_pool_params; |
53 const SchedulerWorkerPoolParams foreground_worker_pool_params; | 53 const SchedulerWorkerPoolParams foreground_worker_pool_params; |
54 const SchedulerWorkerPoolParams foreground_blocking_worker_pool_params; | 54 const SchedulerWorkerPoolParams foreground_blocking_worker_pool_params; |
55 }; | 55 }; |
56 | 56 |
57 // Returns the index of the worker pool in which a task with |traits| should | |
58 // run. This should be coded in a future-proof way: new traits should | |
59 // gracefully map to a default pool. | |
60 using WorkerPoolIndexForTraitsCallback = | |
61 Callback<size_t(const TaskTraits& traits)>; | |
62 | |
63 // Destroying a TaskScheduler is not allowed in production; it is always | 57 // Destroying a TaskScheduler is not allowed in production; it is always |
64 // leaked. In tests, it should only be destroyed after JoinForTesting() has | 58 // leaked. In tests, it should only be destroyed after JoinForTesting() has |
65 // returned. | 59 // returned. |
66 virtual ~TaskScheduler() = default; | 60 virtual ~TaskScheduler() = default; |
67 | 61 |
68 // Posts |task| with a |delay| and specific |traits|. |delay| can be zero. | 62 // Posts |task| with a |delay| and specific |traits|. |delay| can be zero. |
69 // For one off tasks that don't require a TaskRunner. | 63 // For one off tasks that don't require a TaskRunner. |
70 virtual void PostDelayedTaskWithTraits( | 64 virtual void PostDelayedTaskWithTraits( |
71 const tracked_objects::Location& from_here, | 65 const tracked_objects::Location& from_here, |
72 const TaskTraits& traits, | 66 const TaskTraits& traits, |
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139 // new TaskScheduler. | 133 // new TaskScheduler. |
140 | 134 |
141 #if !defined(OS_NACL) | 135 #if !defined(OS_NACL) |
142 // Creates and sets a task scheduler using default params. |name| is used to | 136 // Creates and sets a task scheduler using default params. |name| is used to |
143 // label threads and histograms. It should identify the component that calls | 137 // label threads and histograms. It should identify the component that calls |
144 // this. CHECKs on failure. For tests, prefer base::test::ScopedTaskScheduler | 138 // this. CHECKs on failure. For tests, prefer base::test::ScopedTaskScheduler |
145 // (ensures isolation). | 139 // (ensures isolation). |
146 static void CreateAndSetSimpleTaskScheduler(const std::string& name); | 140 static void CreateAndSetSimpleTaskScheduler(const std::string& name); |
147 #endif // !defined(OS_NACL) | 141 #endif // !defined(OS_NACL) |
148 | 142 |
149 // Creates and sets a task scheduler with custom worker pools. CHECKs on | |
150 // failure. |worker_pool_params_vector| describes the worker pools to create. | |
151 // |worker_pool_index_for_traits_callback| returns the index in |worker_pools| | |
152 // of the worker pool in which a task with given traits should run. For tests, | |
153 // prefer base::test::ScopedTaskScheduler (ensures isolation). | |
154 // | |
155 // Deprecated. Use the overload below instead. https://crbug.com/690706 | |
156 static void CreateAndSetDefaultTaskScheduler( | |
157 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, | |
158 const WorkerPoolIndexForTraitsCallback& | |
159 worker_pool_index_for_traits_callback); | |
160 | |
161 // Creates and sets a task scheduler using custom params. |name| is used to | 143 // Creates and sets a task scheduler using custom params. |name| is used to |
162 // label threads and histograms. It should identify the component that creates | 144 // label threads and histograms. It should identify the component that creates |
163 // the TaskScheduler. |init_params| is used to initialize the worker pools. | 145 // the TaskScheduler. |init_params| is used to initialize the worker pools. |
164 // CHECKs on failure. For tests, prefer base::test::ScopedTaskScheduler | 146 // CHECKs on failure. For tests, prefer base::test::ScopedTaskScheduler |
165 // (ensures isolation). | 147 // (ensures isolation). |
166 // | 148 // |
167 // Note: The names and priority hints in |init_params| are ignored (ref. TODO | 149 // Note: The names and priority hints in |init_params| are ignored (ref. TODO |
168 // to remove them). | 150 // to remove them). |
169 static void CreateAndSetDefaultTaskScheduler(const std::string& name, | 151 static void CreateAndSetDefaultTaskScheduler(const std::string& name, |
170 const InitParams& init_params); | 152 const InitParams& init_params); |
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198 // each process n/GetMaxConcurrentTasksWithTraitsDeprecated() items. | 180 // each process n/GetMaxConcurrentTasksWithTraitsDeprecated() items. |
199 // | 181 // |
200 // TODO(fdoray): Remove this method. https://crbug.com/687264 | 182 // TODO(fdoray): Remove this method. https://crbug.com/687264 |
201 virtual int GetMaxConcurrentTasksWithTraitsDeprecated( | 183 virtual int GetMaxConcurrentTasksWithTraitsDeprecated( |
202 const TaskTraits& traits) const = 0; | 184 const TaskTraits& traits) const = 0; |
203 }; | 185 }; |
204 | 186 |
205 } // namespace base | 187 } // namespace base |
206 | 188 |
207 #endif // BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ | 189 #endif // BASE_TASK_SCHEDULER_TASK_SCHEDULER_H_ |
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