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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_DELAYED_TASK_MANAGER_H_ | 5 #ifndef BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ |
| 6 #define BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ | 6 #define BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ |
| 7 | 7 |
| 8 #include <stdint.h> | 8 #include <stdint.h> |
| 9 | 9 |
| 10 #include <memory> | 10 #include <memory> |
| 11 #include <queue> | 11 #include <queue> |
| 12 #include <vector> | 12 #include <vector> |
| 13 | 13 |
| 14 #include "base/base_export.h" | 14 #include "base/base_export.h" |
| 15 #include "base/callback.h" | 15 #include "base/callback.h" |
| 16 #include "base/macros.h" | 16 #include "base/macros.h" |
| 17 #include "base/memory/ref_counted.h" | 17 #include "base/memory/ref_counted.h" |
| 18 #include "base/task_scheduler/scheduler_lock.h" | 18 #include "base/task_scheduler/scheduler_lock.h" |
| 19 #include "base/task_scheduler/sequence.h" | 19 #include "base/task_scheduler/sequence.h" |
| 20 #include "base/task_scheduler/task.h" | 20 #include "base/task_scheduler/task.h" |
| 21 #include "base/time/time.h" | 21 #include "base/time/time.h" |
| 22 | 22 |
| 23 namespace base { | 23 namespace base { |
| 24 namespace internal { | 24 namespace internal { |
| 25 | 25 |
| 26 class SchedulerThreadPool; | 26 class SchedulerWorkerPool; |
| 27 class SchedulerWorkerThread; | 27 class SchedulerWorkerThread; |
| 28 | 28 |
| 29 // A DelayedTaskManager holds delayed Tasks until they become ripe for | 29 // A DelayedTaskManager holds delayed Tasks until they become ripe for |
| 30 // execution. This class is thread-safe. | 30 // execution. This class is thread-safe. |
| 31 class BASE_EXPORT DelayedTaskManager { | 31 class BASE_EXPORT DelayedTaskManager { |
| 32 public: | 32 public: |
| 33 // |on_delayed_run_time_updated| is invoked when the delayed run time is | 33 // |on_delayed_run_time_updated| is invoked when the delayed run time is |
| 34 // updated as a result of adding a delayed task to the manager. | 34 // updated as a result of adding a delayed task to the manager. |
| 35 explicit DelayedTaskManager(const Closure& on_delayed_run_time_updated); | 35 explicit DelayedTaskManager(const Closure& on_delayed_run_time_updated); |
| 36 ~DelayedTaskManager(); | 36 ~DelayedTaskManager(); |
| 37 | 37 |
| 38 // Adds |task| to a queue of delayed tasks. The task will be posted to | 38 // Adds |task| to a queue of delayed tasks. The task will be posted to |
| 39 // |thread_pool| with |sequence| and |worker_thread| the first time that | 39 // |worker_pool| with |sequence| and |worker_thread| the first time that |
| 40 // PostReadyTasks() is called while Now() is passed |task->delayed_run_time|. | 40 // PostReadyTasks() is called while Now() is passed |task->delayed_run_time|. |
| 41 // |worker_thread| is a SchedulerWorkerThread owned by |thread_pool| or | 41 // |worker_thread| is a SchedulerWorkerThread owned by |worker_pool| or |
| 42 // nullptr. | 42 // nullptr. |
| 43 // | 43 // |
| 44 // TODO(robliao): Find a concrete way to manage the memory of |worker_thread| | 44 // TODO(robliao): Find a concrete way to manage the memory of |worker_thread| |
| 45 // and |thread_pool|. These objects are never deleted in production, but it is | 45 // and |worker_pool|. These objects are never deleted in production, but it is |
| 46 // better not to spread this assumption throughout the scheduler. | 46 // better not to spread this assumption throughout the scheduler. |
| 47 void AddDelayedTask(std::unique_ptr<Task> task, | 47 void AddDelayedTask(std::unique_ptr<Task> task, |
| 48 scoped_refptr<Sequence> sequence, | 48 scoped_refptr<Sequence> sequence, |
| 49 SchedulerWorkerThread* worker_thread, | 49 SchedulerWorkerThread* worker_thread, |
| 50 SchedulerThreadPool* thread_pool); | 50 SchedulerWorkerPool* worker_pool); |
| 51 | 51 |
| 52 // Posts delayed tasks that are ripe for execution. | 52 // Posts delayed tasks that are ripe for execution. |
| 53 void PostReadyTasks(); | 53 void PostReadyTasks(); |
| 54 | 54 |
| 55 // Returns the next time at which a delayed task will become ripe for | 55 // Returns the next time at which a delayed task will become ripe for |
| 56 // execution, or a null TimeTicks if there are no pending delayed tasks. | 56 // execution, or a null TimeTicks if there are no pending delayed tasks. |
| 57 TimeTicks GetDelayedRunTime() const; | 57 TimeTicks GetDelayedRunTime() const; |
| 58 | 58 |
| 59 // Returns the current time. Can be overridden for tests. | 59 // Returns the current time. Can be overridden for tests. |
| 60 virtual TimeTicks Now() const; | 60 virtual TimeTicks Now() const; |
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| 80 // The index to assign to the next delayed task added to the manager. | 80 // The index to assign to the next delayed task added to the manager. |
| 81 uint64_t delayed_task_index_ = 0; | 81 uint64_t delayed_task_index_ = 0; |
| 82 | 82 |
| 83 DISALLOW_COPY_AND_ASSIGN(DelayedTaskManager); | 83 DISALLOW_COPY_AND_ASSIGN(DelayedTaskManager); |
| 84 }; | 84 }; |
| 85 | 85 |
| 86 } // namespace internal | 86 } // namespace internal |
| 87 } // namespace base | 87 } // namespace base |
| 88 | 88 |
| 89 #endif // BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ | 89 #endif // BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ |
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