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Side by Side Diff: third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h

Issue 2836853003: scheduler: Use PLATFORM_EXPORT instead of BLINK_PLATFORM_EXPORT (Closed)
Patch Set: Rebased Created 3 years, 8 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 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 THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_H_ 5 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_H_
6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_H_ 6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_H_
7 7
8 #include <map> 8 #include <map>
9 9
10 #include "base/atomic_sequence_num.h" 10 #include "base/atomic_sequence_num.h"
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44 // sub queues: 44 // sub queues:
45 // 45 //
46 // 1. Incoming task queue. Tasks that are posted get immediately appended here. 46 // 1. Incoming task queue. Tasks that are posted get immediately appended here.
47 // When a task is appended into an empty incoming queue, the task manager 47 // When a task is appended into an empty incoming queue, the task manager
48 // work function (DoWork) is scheduled to run on the main task runner. 48 // work function (DoWork) is scheduled to run on the main task runner.
49 // 49 //
50 // 2. Work queue. If a work queue is empty when DoWork() is entered, tasks from 50 // 2. Work queue. If a work queue is empty when DoWork() is entered, tasks from
51 // the incoming task queue (if any) are moved here. The work queues are 51 // the incoming task queue (if any) are moved here. The work queues are
52 // registered with the selector as input to the scheduling decision. 52 // registered with the selector as input to the scheduling decision.
53 // 53 //
54 class BLINK_PLATFORM_EXPORT TaskQueueManager 54 class PLATFORM_EXPORT TaskQueueManager
55 : public internal::TaskQueueSelector::Observer, 55 : public internal::TaskQueueSelector::Observer,
56 public base::MessageLoop::NestingObserver { 56 public base::MessageLoop::NestingObserver {
57 public: 57 public:
58 // Create a task queue manager where |delegate| identifies the thread 58 // Create a task queue manager where |delegate| identifies the thread
59 // on which where the tasks are eventually run. Category strings must have 59 // on which where the tasks are eventually run. Category strings must have
60 // application lifetime (statics or literals). They may not include " chars. 60 // application lifetime (statics or literals). They may not include " chars.
61 TaskQueueManager(scoped_refptr<TaskQueueManagerDelegate> delegate, 61 TaskQueueManager(scoped_refptr<TaskQueueManagerDelegate> delegate,
62 const char* tracing_category, 62 const char* tracing_category,
63 const char* disabled_by_default_tracing_category, 63 const char* disabled_by_default_tracing_category,
64 const char* disabled_by_default_verbose_tracing_category); 64 const char* disabled_by_default_verbose_tracing_category);
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98 98
99 // Returns true if any task from a monitored task queue was was run since the 99 // Returns true if any task from a monitored task queue was was run since the
100 // last call to GetAndClearSystemIsQuiescentBit. 100 // last call to GetAndClearSystemIsQuiescentBit.
101 bool GetAndClearSystemIsQuiescentBit(); 101 bool GetAndClearSystemIsQuiescentBit();
102 102
103 // Creates a task queue with the given |spec|. Must be called on the thread 103 // Creates a task queue with the given |spec|. Must be called on the thread
104 // this class was created on. 104 // this class was created on.
105 scoped_refptr<internal::TaskQueueImpl> NewTaskQueue( 105 scoped_refptr<internal::TaskQueueImpl> NewTaskQueue(
106 const TaskQueue::Spec& spec); 106 const TaskQueue::Spec& spec);
107 107
108 class BLINK_PLATFORM_EXPORT Observer { 108 class PLATFORM_EXPORT Observer {
109 public: 109 public:
110 virtual ~Observer() {} 110 virtual ~Observer() {}
111 111
112 // Called when |queue| is unregistered. 112 // Called when |queue| is unregistered.
113 virtual void OnUnregisterTaskQueue( 113 virtual void OnUnregisterTaskQueue(
114 const scoped_refptr<TaskQueue>& queue) = 0; 114 const scoped_refptr<TaskQueue>& queue) = 0;
115 115
116 // Called when the manager tried to execute a task from a disabled 116 // Called when the manager tried to execute a task from a disabled
117 // queue. See TaskQueue::Spec::SetShouldReportWhenExecutionBlocked. 117 // queue. See TaskQueue::Spec::SetShouldReportWhenExecutionBlocked.
118 virtual void OnTriedToExecuteBlockedTask(const TaskQueue& queue, 118 virtual void OnTriedToExecuteBlockedTask(const TaskQueue& queue,
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382 scoped_refptr<DeletionSentinel> deletion_sentinel_; 382 scoped_refptr<DeletionSentinel> deletion_sentinel_;
383 base::WeakPtrFactory<TaskQueueManager> weak_factory_; 383 base::WeakPtrFactory<TaskQueueManager> weak_factory_;
384 384
385 DISALLOW_COPY_AND_ASSIGN(TaskQueueManager); 385 DISALLOW_COPY_AND_ASSIGN(TaskQueueManager);
386 }; 386 };
387 387
388 } // namespace scheduler 388 } // namespace scheduler
389 } // namespace blink 389 } // namespace blink
390 390
391 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_ H_ 391 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_MANAGER_ H_
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