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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/threading/worker_pool.h" | 5 #include "base/threading/worker_pool.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
9 #include "base/lazy_instance.h" | 9 #include "base/lazy_instance.h" |
10 #include "base/task_runner.h" | 10 #include "base/task_runner.h" |
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34 // fixed ShutdownBehavior. | 34 // fixed ShutdownBehavior. |
35 // | 35 // |
36 // Note that this class is RefCountedThreadSafe (inherited from TaskRunner). | 36 // Note that this class is RefCountedThreadSafe (inherited from TaskRunner). |
37 class WorkerPoolTaskRunner : public TaskRunner { | 37 class WorkerPoolTaskRunner : public TaskRunner { |
38 public: | 38 public: |
39 WorkerPoolTaskRunner(bool tasks_are_slow); | 39 WorkerPoolTaskRunner(bool tasks_are_slow); |
40 | 40 |
41 // TaskRunner implementation | 41 // TaskRunner implementation |
42 virtual bool PostDelayedTask(const tracked_objects::Location& from_here, | 42 virtual bool PostDelayedTask(const tracked_objects::Location& from_here, |
43 const Closure& task, | 43 const Closure& task, |
44 int64 delay_ms) OVERRIDE; | |
45 virtual bool PostDelayedTask(const tracked_objects::Location& from_here, | |
46 const Closure& task, | |
47 TimeDelta delay) OVERRIDE; | 44 TimeDelta delay) OVERRIDE; |
48 virtual bool RunsTasksOnCurrentThread() const OVERRIDE; | 45 virtual bool RunsTasksOnCurrentThread() const OVERRIDE; |
49 | 46 |
50 private: | 47 private: |
51 virtual ~WorkerPoolTaskRunner(); | 48 virtual ~WorkerPoolTaskRunner(); |
52 | 49 |
53 // Helper function for posting a delayed task. Asserts that the delay is | 50 // Helper function for posting a delayed task. Asserts that the delay is |
54 // zero because non-zero delays are not supported. | 51 // zero because non-zero delays are not supported. |
55 bool PostDelayedTaskAssertZeroDelay( | 52 bool PostDelayedTaskAssertZeroDelay( |
56 const tracked_objects::Location& from_here, | 53 const tracked_objects::Location& from_here, |
57 const Closure& task, | 54 const Closure& task, |
58 int64 delay_ms); | 55 base::TimeDelta delay); |
59 | 56 |
60 const bool tasks_are_slow_; | 57 const bool tasks_are_slow_; |
61 | 58 |
62 DISALLOW_COPY_AND_ASSIGN(WorkerPoolTaskRunner); | 59 DISALLOW_COPY_AND_ASSIGN(WorkerPoolTaskRunner); |
63 }; | 60 }; |
64 | 61 |
65 WorkerPoolTaskRunner::WorkerPoolTaskRunner(bool tasks_are_slow) | 62 WorkerPoolTaskRunner::WorkerPoolTaskRunner(bool tasks_are_slow) |
66 : tasks_are_slow_(tasks_are_slow) { | 63 : tasks_are_slow_(tasks_are_slow) { |
67 } | 64 } |
68 | 65 |
69 WorkerPoolTaskRunner::~WorkerPoolTaskRunner() { | 66 WorkerPoolTaskRunner::~WorkerPoolTaskRunner() { |
70 } | 67 } |
71 | 68 |
72 bool WorkerPoolTaskRunner::PostDelayedTask( | 69 bool WorkerPoolTaskRunner::PostDelayedTask( |
73 const tracked_objects::Location& from_here, | 70 const tracked_objects::Location& from_here, |
74 const Closure& task, | 71 const Closure& task, |
75 int64 delay_ms) { | |
76 return PostDelayedTaskAssertZeroDelay(from_here, task, delay_ms); | |
77 } | |
78 | |
79 bool WorkerPoolTaskRunner::PostDelayedTask( | |
80 const tracked_objects::Location& from_here, | |
81 const Closure& task, | |
82 TimeDelta delay) { | 72 TimeDelta delay) { |
83 return PostDelayedTask(from_here, task, delay.InMillisecondsRoundedUp()); | 73 return PostDelayedTaskAssertZeroDelay(from_here, task, delay); |
84 } | 74 } |
85 | 75 |
86 bool WorkerPoolTaskRunner::RunsTasksOnCurrentThread() const { | 76 bool WorkerPoolTaskRunner::RunsTasksOnCurrentThread() const { |
87 return WorkerPool::RunsTasksOnCurrentThread(); | 77 return WorkerPool::RunsTasksOnCurrentThread(); |
88 } | 78 } |
89 | 79 |
90 bool WorkerPoolTaskRunner::PostDelayedTaskAssertZeroDelay( | 80 bool WorkerPoolTaskRunner::PostDelayedTaskAssertZeroDelay( |
91 const tracked_objects::Location& from_here, | 81 const tracked_objects::Location& from_here, |
92 const Closure& task, | 82 const Closure& task, |
93 int64 delay_ms) { | 83 base::TimeDelta delay) { |
94 DCHECK_EQ(delay_ms, 0) | 84 DCHECK_EQ(delay.InMillisecondsRoundedUp(), 0) |
95 << "WorkerPoolTaskRunner does not support non-zero delays"; | 85 << "WorkerPoolTaskRunner does not support non-zero delays"; |
96 return WorkerPool::PostTask(from_here, task, tasks_are_slow_); | 86 return WorkerPool::PostTask(from_here, task, tasks_are_slow_); |
97 } | 87 } |
98 | 88 |
99 struct TaskRunnerHolder { | 89 struct TaskRunnerHolder { |
100 TaskRunnerHolder() { | 90 TaskRunnerHolder() { |
101 taskrunners_[0] = new WorkerPoolTaskRunner(false); | 91 taskrunners_[0] = new WorkerPoolTaskRunner(false); |
102 taskrunners_[1] = new WorkerPoolTaskRunner(true); | 92 taskrunners_[1] = new WorkerPoolTaskRunner(true); |
103 } | 93 } |
104 scoped_refptr<TaskRunner> taskrunners_[2]; | 94 scoped_refptr<TaskRunner> taskrunners_[2]; |
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117 from_here, task, reply); | 107 from_here, task, reply); |
118 } | 108 } |
119 | 109 |
120 // static | 110 // static |
121 const scoped_refptr<TaskRunner>& | 111 const scoped_refptr<TaskRunner>& |
122 WorkerPool::GetTaskRunner(bool tasks_are_slow) { | 112 WorkerPool::GetTaskRunner(bool tasks_are_slow) { |
123 return g_taskrunners.Get().taskrunners_[tasks_are_slow]; | 113 return g_taskrunners.Get().taskrunners_[tasks_are_slow]; |
124 } | 114 } |
125 | 115 |
126 } // namespace base | 116 } // namespace base |
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