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Side by Side Diff: base/task_scheduler/delayed_task_manager.h

Issue 2068853002: Rename SchedulerThreadPool* to SchedulerWorkerPool* (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@rename1
Patch Set: CR Feedback fdoray@ Created 4 years, 6 months ago
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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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