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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 2011 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 CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ | 5 #ifndef CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ |
6 #define CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ | 6 #define CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ |
7 | 7 |
8 #include "base/memory/weak_ptr.h" | 8 #include "base/memory/weak_ptr.h" |
9 #include "cc/base/cc_export.h" | 9 #include "cc/base/cc_export.h" |
10 #include "cc/scheduler/time_source.h" | 10 #include "cc/scheduler/time_source.h" |
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40 | 40 |
41 protected: | 41 protected: |
42 DelayBasedTimeSource(base::TimeDelta interval, | 42 DelayBasedTimeSource(base::TimeDelta interval, |
43 base::SingleThreadTaskRunner* task_runner); | 43 base::SingleThreadTaskRunner* task_runner); |
44 virtual ~DelayBasedTimeSource(); | 44 virtual ~DelayBasedTimeSource(); |
45 | 45 |
46 base::TimeTicks NextTickTarget(base::TimeTicks now); | 46 base::TimeTicks NextTickTarget(base::TimeTicks now); |
47 void PostNextTickTask(base::TimeTicks now); | 47 void PostNextTickTask(base::TimeTicks now); |
48 void OnTimerFired(); | 48 void OnTimerFired(); |
49 | 49 |
50 enum State { | |
51 STATE_INACTIVE, | |
52 STATE_STARTING, | |
53 STATE_ACTIVE, | |
54 }; | |
55 | |
56 struct Parameters { | 50 struct Parameters { |
57 Parameters(base::TimeDelta interval, base::TimeTicks tick_target) | 51 Parameters(base::TimeDelta interval, base::TimeTicks tick_target) |
58 : interval(interval), tick_target(tick_target) {} | 52 : interval(interval), tick_target(tick_target) {} |
59 base::TimeDelta interval; | 53 base::TimeDelta interval; |
60 base::TimeTicks tick_target; | 54 base::TimeTicks tick_target; |
61 }; | 55 }; |
62 | 56 |
63 TimeSourceClient* client_; | 57 TimeSourceClient* client_; |
64 bool has_tick_target_; | |
65 base::TimeTicks last_tick_time_; | 58 base::TimeTicks last_tick_time_; |
66 | 59 |
67 // current_parameters_ should only be written by PostNextTickTask. | 60 // current_parameters_ should only be written by PostNextTickTask. |
68 // next_parameters_ will take effect on the next call to PostNextTickTask. | 61 // next_parameters_ will take effect on the next call to PostNextTickTask. |
69 // Maintaining a pending set of parameters allows NextTickTime() to always | 62 // Maintaining a pending set of parameters allows NextTickTime() to always |
70 // reflect the actual time we expect OnTimerFired to be called. | 63 // reflect the actual time we expect OnTimerFired to be called. |
71 Parameters current_parameters_; | 64 Parameters current_parameters_; |
72 Parameters next_parameters_; | 65 Parameters next_parameters_; |
73 | 66 |
74 State state_; | 67 bool active_; |
75 | 68 |
76 base::SingleThreadTaskRunner* task_runner_; | 69 base::SingleThreadTaskRunner* task_runner_; |
77 base::WeakPtrFactory<DelayBasedTimeSource> weak_factory_; | 70 base::WeakPtrFactory<DelayBasedTimeSource> weak_factory_; |
78 | 71 |
79 private: | 72 private: |
80 DISALLOW_COPY_AND_ASSIGN(DelayBasedTimeSource); | 73 DISALLOW_COPY_AND_ASSIGN(DelayBasedTimeSource); |
81 }; | 74 }; |
82 | 75 |
83 } // namespace cc | 76 } // namespace cc |
84 | 77 |
85 #endif // CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ | 78 #endif // CC_SCHEDULER_DELAY_BASED_TIME_SOURCE_H_ |
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