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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 WebViewScheduler_h | 5 #ifndef WebViewScheduler_h |
6 #define WebViewScheduler_h | 6 #define WebViewScheduler_h |
7 | 7 |
8 #include "WebCommon.h" | 8 #include "WebCommon.h" |
9 #include "public/platform/BlameContext.h" | 9 #include "public/platform/BlameContext.h" |
10 | 10 |
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30 // the system doesn't actually sleep for the delays between tasks before exe
cuting | 30 // the system doesn't actually sleep for the delays between tasks before exe
cuting |
31 // them. E.g: A-E are delayed tasks | 31 // them. E.g: A-E are delayed tasks |
32 // | 32 // |
33 // | A B C D E (normal) | 33 // | A B C D E (normal) |
34 // |-----------------------------> time | 34 // |-----------------------------> time |
35 // | 35 // |
36 // |ABCDE (virtual time) | 36 // |ABCDE (virtual time) |
37 // |-----------------------------> time | 37 // |-----------------------------> time |
38 virtual void enableVirtualTime() = 0; | 38 virtual void enableVirtualTime() = 0; |
39 | 39 |
40 // Controls whether or not virtual time is allowed to advance. If virtual ti
me | 40 // Returns true if virtual time is currently allowed to advance. |
41 // is not allowed to advance then delayed tasks posted to the WebTaskRunners
owned | 41 virtual bool virtualTimeAllowedToAdvance() const = 0; |
42 // by any child WebFrameSchedulers will be paused. If virtual time is allowe
d to | 42 |
43 // advance then tasks will be run in time order (as usual) but virtual time
will | 43 enum class VirtualTimePolicy { |
44 // fast forward so that the system doesn't actually sleep for the delays bet
ween | 44 // In this policy virtual time is allowed to advance. If the blink sched
uler runs out of |
45 // tasks before executing them. | 45 // immediate work, the virtual timebase will be incremented so that the
next sceduled |
46 virtual void setAllowVirtualTimeToAdvance(bool) = 0; | 46 // timer may fire. NOTE Tasks will be run in time order (as usual). |
| 47 ADVANCE, |
| 48 |
| 49 // In this policy virtual time is not allowed to advance. Delayed tasks
posted to |
| 50 // WebTaskRunners owned by any child WebFrameSchedulers will be paused,
unless their |
| 51 // scheduled run time is less than or equal to the current virtual time.
Note non-delayed |
| 52 // tasks will run as normal. |
| 53 PAUSE, |
| 54 |
| 55 // In this policy virtual time is allowed to advance unless there are pe
nding network |
| 56 // fetches associated any child WebFrameScheduler. |
| 57 PAUSE_IF_NETWORK_FETCHES_PENDING |
| 58 }; |
| 59 |
| 60 // Sets the virtual time policy, which is applied imemdiatly to all child We
bFrameSchedulers. |
| 61 virtual void setVirtualTimePolicy(VirtualTimePolicy) = 0; |
47 }; | 62 }; |
48 | 63 |
49 } // namespace blink | 64 } // namespace blink |
50 | 65 |
51 #endif // WebViewScheduler | 66 #endif // WebViewScheduler |
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