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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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_WORK_QUEUE_H_ | 5 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_H_ |
| 6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_H_ | 6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_H_ |
| 7 | 7 |
| 8 #include <stddef.h> | 8 #include <stddef.h> |
| 9 | 9 |
| 10 #include <set> | 10 #include <set> |
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| 22 | 22 |
| 23 // This class keeps track of immediate and delayed tasks which are due to run | 23 // This class keeps track of immediate and delayed tasks which are due to run |
| 24 // now. It interfaces deeply with WorkQueueSets which keeps track of which queue | 24 // now. It interfaces deeply with WorkQueueSets which keeps track of which queue |
| 25 // (with a given priority) contains the oldest task. | 25 // (with a given priority) contains the oldest task. |
| 26 // | 26 // |
| 27 // If a fence is inserted, WorkQueue behaves normally up until | 27 // If a fence is inserted, WorkQueue behaves normally up until |
| 28 // TakeTaskFromWorkQueue reaches or exceeds the fence. At that point it the | 28 // TakeTaskFromWorkQueue reaches or exceeds the fence. At that point it the |
| 29 // API subset used by WorkQueueSets pretends the WorkQueue is empty until the | 29 // API subset used by WorkQueueSets pretends the WorkQueue is empty until the |
| 30 // fence is removed. This functionality is a primitive intended for use by | 30 // fence is removed. This functionality is a primitive intended for use by |
| 31 // throttling mechanisms. | 31 // throttling mechanisms. |
| 32 class BLINK_PLATFORM_EXPORT WorkQueue { | 32 class PLATFORM_EXPORT WorkQueue { |
| 33 public: | 33 public: |
| 34 enum class QueueType { DELAYED, IMMEDIATE }; | 34 enum class QueueType { DELAYED, IMMEDIATE }; |
| 35 | 35 |
| 36 WorkQueue(TaskQueueImpl* task_queue, const char* name, QueueType queue_type); | 36 WorkQueue(TaskQueueImpl* task_queue, const char* name, QueueType queue_type); |
| 37 ~WorkQueue(); | 37 ~WorkQueue(); |
| 38 | 38 |
| 39 // Associates this work queue with the given work queue sets. This must be | 39 // Associates this work queue with the given work queue sets. This must be |
| 40 // called before any tasks can be inserted into this work queue. | 40 // called before any tasks can be inserted into this work queue. |
| 41 void AssignToWorkQueueSets(WorkQueueSets* work_queue_sets); | 41 void AssignToWorkQueueSets(WorkQueueSets* work_queue_sets); |
| 42 | 42 |
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| 125 const QueueType queue_type_; | 125 const QueueType queue_type_; |
| 126 | 126 |
| 127 DISALLOW_COPY_AND_ASSIGN(WorkQueue); | 127 DISALLOW_COPY_AND_ASSIGN(WorkQueue); |
| 128 }; | 128 }; |
| 129 | 129 |
| 130 } // namespace internal | 130 } // namespace internal |
| 131 } // namespace scheduler | 131 } // namespace scheduler |
| 132 } // namespace blink | 132 } // namespace blink |
| 133 | 133 |
| 134 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_H_ | 134 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_H_ |
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