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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 WebScheduler_h | 5 #ifndef WebScheduler_h |
6 #define WebScheduler_h | 6 #define WebScheduler_h |
7 | 7 |
8 #include "WebCommon.h" | 8 #include "WebCommon.h" |
9 #include "WebString.h" | 9 #include "WebString.h" |
10 #include "public/platform/WebTaskRunner.h" | 10 #include "public/platform/WebTaskRunner.h" |
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31 // which should be reported to the developer. | 31 // which should be reported to the developer. |
32 virtual void ReportIntervention(const WebString& message) = 0; | 32 virtual void ReportIntervention(const WebString& message) = 0; |
33 }; | 33 }; |
34 | 34 |
35 virtual ~WebScheduler() {} | 35 virtual ~WebScheduler() {} |
36 | 36 |
37 // Called to prevent any more pending tasks from running. Must be called on | 37 // Called to prevent any more pending tasks from running. Must be called on |
38 // the associated WebThread. | 38 // the associated WebThread. |
39 virtual void shutdown() = 0; | 39 virtual void shutdown() = 0; |
40 | 40 |
41 // Returns true if there is high priority work pending on the associated WebTh
read | 41 // Returns true if there is high priority work pending on the associated |
42 // and the caller should yield to let the scheduler service that work. | 42 // WebThread and the caller should yield to let the scheduler service that |
43 // Must be called on the associated WebThread. | 43 // work. Must be called on the associated WebThread. |
44 virtual bool shouldYieldForHighPriorityWork() = 0; | 44 virtual bool shouldYieldForHighPriorityWork() = 0; |
45 | 45 |
46 // Returns true if a currently running idle task could exceed its deadline | 46 // Returns true if a currently running idle task could exceed its deadline |
47 // without impacting user experience too much. This should only be used if | 47 // without impacting user experience too much. This should only be used if |
48 // there is a task which cannot be pre-empted and is likely to take longer | 48 // there is a task which cannot be pre-empted and is likely to take longer |
49 // than the largest expected idle task deadline. It should NOT be polled to | 49 // than the largest expected idle task deadline. It should NOT be polled to |
50 // check whether more work can be performed on the current idle task after | 50 // check whether more work can be performed on the current idle task after |
51 // its deadline has expired - post a new idle task for the continuation of | 51 // its deadline has expired - post a new idle task for the continuation of |
52 // the work in this case. | 52 // the work in this case. |
53 // Must be called from the associated WebThread. | 53 // Must be called from the associated WebThread. |
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104 | 104 |
105 void postIdleTask(const WebTraceLocation&, std::unique_ptr<IdleTask>); | 105 void postIdleTask(const WebTraceLocation&, std::unique_ptr<IdleTask>); |
106 void postNonNestableIdleTask(const WebTraceLocation&, | 106 void postNonNestableIdleTask(const WebTraceLocation&, |
107 std::unique_ptr<IdleTask>); | 107 std::unique_ptr<IdleTask>); |
108 #endif | 108 #endif |
109 }; | 109 }; |
110 | 110 |
111 } // namespace blink | 111 } // namespace blink |
112 | 112 |
113 #endif // WebScheduler_h | 113 #endif // WebScheduler_h |
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