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

Issue 2077093002: Rename SchedulerWorkerThread* to SchedulerWorker* (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@rename2
Patch Set: 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 SchedulerWorker;
26 class SchedulerWorkerPool; 27 class SchedulerWorkerPool;
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 // |worker_pool| with |sequence| and |worker_thread| the first time that 39 // |worker_pool| with |sequence| and |worker| 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 |worker_pool| or 41 // |worker| is a SchedulerWorker owned by |worker_pool| or nullptr.
42 // nullptr.
43 // 42 //
44 // TODO(robliao): Find a concrete way to manage the memory of |worker_thread| 43 // TODO(robliao): Find a concrete way to manage the memory of |worker| and
45 // and |worker_pool|. These objects are never deleted in production, but it is 44 // |worker_pool|. These objects are never deleted in production, but it is
46 // better not to spread this assumption throughout the scheduler. 45 // better not to spread this assumption throughout the scheduler.
47 void AddDelayedTask(std::unique_ptr<Task> task, 46 void AddDelayedTask(std::unique_ptr<Task> task,
48 scoped_refptr<Sequence> sequence, 47 scoped_refptr<Sequence> sequence,
49 SchedulerWorkerThread* worker_thread, 48 SchedulerWorker* worker,
50 SchedulerWorkerPool* worker_pool); 49 SchedulerWorkerPool* worker_pool);
51 50
52 // Posts delayed tasks that are ripe for execution. 51 // Posts delayed tasks that are ripe for execution.
53 void PostReadyTasks(); 52 void PostReadyTasks();
54 53
55 // Returns the next time at which a delayed task will become ripe for 54 // 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. 55 // execution, or a null TimeTicks if there are no pending delayed tasks.
57 TimeTicks GetDelayedRunTime() const; 56 TimeTicks GetDelayedRunTime() const;
58 57
59 // Returns the current time. Can be overridden for tests. 58 // Returns the current time. Can be overridden for tests.
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80 // The index to assign to the next delayed task added to the manager. 79 // The index to assign to the next delayed task added to the manager.
81 uint64_t delayed_task_index_ = 0; 80 uint64_t delayed_task_index_ = 0;
82 81
83 DISALLOW_COPY_AND_ASSIGN(DelayedTaskManager); 82 DISALLOW_COPY_AND_ASSIGN(DelayedTaskManager);
84 }; 83 };
85 84
86 } // namespace internal 85 } // namespace internal
87 } // namespace base 86 } // namespace base
88 87
89 #endif // BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_ 88 #endif // BASE_TASK_SCHEDULER_DELAYED_TASK_MANAGER_H_
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