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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 #include "cc/scheduler/delay_based_time_source.h" | 5 #include "cc/scheduler/delay_based_time_source.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <cmath> | 8 #include <cmath> |
9 #include <string> | 9 #include <string> |
10 | 10 |
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30 // within the thresholds, the change will take place on the next tick. If | 30 // within the thresholds, the change will take place on the next tick. If |
31 // either change is outside the thresholds, the next tick will be canceled and | 31 // either change is outside the thresholds, the next tick will be canceled and |
32 // reissued immediately. | 32 // reissued immediately. |
33 static const double kIntervalChangeThreshold = 0.25; | 33 static const double kIntervalChangeThreshold = 0.25; |
34 static const double kPhaseChangeThreshold = 0.25; | 34 static const double kPhaseChangeThreshold = 0.25; |
35 | 35 |
36 } // namespace | 36 } // namespace |
37 | 37 |
38 // The following methods correspond to the DelayBasedTimeSource that uses | 38 // The following methods correspond to the DelayBasedTimeSource that uses |
39 // the base::TimeTicks::Now as the timebase. | 39 // the base::TimeTicks::Now as the timebase. |
40 scoped_refptr<DelayBasedTimeSourceHighRes> DelayBasedTimeSourceHighRes::Create( | |
41 base::TimeDelta interval, | |
42 base::SingleThreadTaskRunner* task_runner) { | |
43 return make_scoped_refptr( | |
44 new DelayBasedTimeSourceHighRes(interval, task_runner)); | |
45 } | |
46 | |
47 DelayBasedTimeSourceHighRes::DelayBasedTimeSourceHighRes( | |
48 base::TimeDelta interval, | |
49 base::SingleThreadTaskRunner* task_runner) | |
50 : DelayBasedTimeSource(interval, task_runner) { | |
51 } | |
52 | |
53 DelayBasedTimeSourceHighRes::~DelayBasedTimeSourceHighRes() {} | |
54 | |
55 base::TimeTicks DelayBasedTimeSourceHighRes::Now() const { | |
56 return base::TimeTicks::Now(); | |
57 } | |
58 | |
59 // The following methods correspond to the DelayBasedTimeSource that uses | |
60 // the base::TimeTicks::Now as the timebase. | |
61 scoped_refptr<DelayBasedTimeSource> DelayBasedTimeSource::Create( | 40 scoped_refptr<DelayBasedTimeSource> DelayBasedTimeSource::Create( |
62 base::TimeDelta interval, | 41 base::TimeDelta interval, |
63 base::SingleThreadTaskRunner* task_runner) { | 42 base::SingleThreadTaskRunner* task_runner) { |
64 return make_scoped_refptr(new DelayBasedTimeSource(interval, task_runner)); | 43 return make_scoped_refptr(new DelayBasedTimeSource(interval, task_runner)); |
65 } | 44 } |
66 | 45 |
67 DelayBasedTimeSource::DelayBasedTimeSource( | 46 DelayBasedTimeSource::DelayBasedTimeSource( |
68 base::TimeDelta interval, | 47 base::TimeDelta interval, |
69 base::SingleThreadTaskRunner* task_runner) | 48 base::SingleThreadTaskRunner* task_runner) |
70 : client_(NULL), | 49 : client_(NULL), |
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265 delay); | 244 delay); |
266 | 245 |
267 next_parameters_.tick_target = new_tick_target; | 246 next_parameters_.tick_target = new_tick_target; |
268 current_parameters_ = next_parameters_; | 247 current_parameters_ = next_parameters_; |
269 } | 248 } |
270 | 249 |
271 std::string DelayBasedTimeSource::TypeString() const { | 250 std::string DelayBasedTimeSource::TypeString() const { |
272 return "DelayBasedTimeSource"; | 251 return "DelayBasedTimeSource"; |
273 } | 252 } |
274 | 253 |
275 std::string DelayBasedTimeSourceHighRes::TypeString() const { | |
276 return "DelayBasedTimeSourceHighRes"; | |
277 } | |
278 | |
279 void DelayBasedTimeSource::AsValueInto( | 254 void DelayBasedTimeSource::AsValueInto( |
280 base::trace_event::TracedValue* state) const { | 255 base::trace_event::TracedValue* state) const { |
281 state->SetString("type", TypeString()); | 256 state->SetString("type", TypeString()); |
282 state->SetDouble("last_tick_time_us", LastTickTime().ToInternalValue()); | 257 state->SetDouble("last_tick_time_us", LastTickTime().ToInternalValue()); |
283 state->SetDouble("next_tick_time_us", NextTickTime().ToInternalValue()); | 258 state->SetDouble("next_tick_time_us", NextTickTime().ToInternalValue()); |
284 | 259 |
285 state->BeginDictionary("current_parameters"); | 260 state->BeginDictionary("current_parameters"); |
286 state->SetDouble("interval_us", | 261 state->SetDouble("interval_us", |
287 current_parameters_.interval.InMicroseconds()); | 262 current_parameters_.interval.InMicroseconds()); |
288 state->SetDouble("tick_target_us", | 263 state->SetDouble("tick_target_us", |
289 current_parameters_.tick_target.ToInternalValue()); | 264 current_parameters_.tick_target.ToInternalValue()); |
290 state->EndDictionary(); | 265 state->EndDictionary(); |
291 | 266 |
292 state->BeginDictionary("next_parameters"); | 267 state->BeginDictionary("next_parameters"); |
293 state->SetDouble("interval_us", next_parameters_.interval.InMicroseconds()); | 268 state->SetDouble("interval_us", next_parameters_.interval.InMicroseconds()); |
294 state->SetDouble("tick_target_us", | 269 state->SetDouble("tick_target_us", |
295 next_parameters_.tick_target.ToInternalValue()); | 270 next_parameters_.tick_target.ToInternalValue()); |
296 state->EndDictionary(); | 271 state->EndDictionary(); |
297 | 272 |
298 state->SetBoolean("active", active_); | 273 state->SetBoolean("active", active_); |
299 } | 274 } |
300 | 275 |
301 } // namespace cc | 276 } // namespace cc |
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