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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 "config.h" | 5 #include "config.h" |
| 6 | 6 |
| 7 #include "CCDelayBasedTimeSource.h" | 7 #include "CCDelayBasedTimeSource.h" |
| 8 | 8 |
| 9 #include "TraceEvent.h" | 9 #include "TraceEvent.h" |
| 10 #include <algorithm> | 10 #include <algorithm> |
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| 66 m_timer.startOneShot(0); | 66 m_timer.startOneShot(0); |
| 67 return; | 67 return; |
| 68 } | 68 } |
| 69 | 69 |
| 70 m_state = STATE_ACTIVE; | 70 m_state = STATE_ACTIVE; |
| 71 | 71 |
| 72 double now = monotonicTimeNow(); | 72 double now = monotonicTimeNow(); |
| 73 postNextTickTask(now); | 73 postNextTickTask(now); |
| 74 } | 74 } |
| 75 | 75 |
| 76 bool CCDelayBasedTimeSource::active() const |
| 77 { |
| 78 return m_state != STATE_INACTIVE; |
| 79 } |
| 80 |
| 76 double CCDelayBasedTimeSource::lastTickTime() | 81 double CCDelayBasedTimeSource::lastTickTime() |
| 77 { | 82 { |
| 78 return m_lastTickTime; | 83 return m_lastTickTime; |
| 79 } | 84 } |
| 80 | 85 |
| 81 double CCDelayBasedTimeSource::nextTickTimeIfActivated() | 86 double CCDelayBasedTimeSource::nextTickTimeIfActivated() |
| 82 { | 87 { |
| 83 return active() ? m_currentParameters.tickTarget : nextTickTarget(monotonicT
imeNow()); | 88 return active() ? m_currentParameters.tickTarget : nextTickTarget(monotonicT
imeNow()); |
| 84 } | 89 } |
| 85 | 90 |
| 86 void CCDelayBasedTimeSource::onTimerFired() | 91 void CCDelayBasedTimeSource::onTimerFired() |
| 87 { | 92 { |
| 88 ASSERT(m_state != STATE_INACTIVE); | 93 ASSERT(m_state != STATE_INACTIVE); |
| 89 | 94 |
| 90 double now = monotonicTimeNow(); | 95 double now = monotonicTimeNow(); |
| 91 m_lastTickTime = now; | 96 m_lastTickTime = now; |
| 92 | 97 |
| 93 if (m_state == STATE_STARTING) { | 98 if (m_state == STATE_STARTING) { |
| 94 setTimebaseAndInterval(now, m_currentParameters.interval); | 99 setTimebaseAndInterval(now, m_currentParameters.interval); |
| 95 m_state = STATE_ACTIVE; | 100 m_state = STATE_ACTIVE; |
| 96 } | 101 } |
| 97 | 102 |
| 98 postNextTickTask(now); | 103 postNextTickTask(now); |
| 99 | 104 |
| 100 // Fire the tick | 105 // Fire the tick |
| 101 if (m_client) | 106 if (m_client) |
| 102 m_client->onTimerTick(); | 107 m_client->onTimerTick(); |
| 103 } | 108 } |
| 104 | 109 |
| 110 void CCDelayBasedTimeSource::setClient(CCTimeSourceClient* client) |
| 111 { |
| 112 m_client = client; |
| 113 } |
| 114 |
| 105 void CCDelayBasedTimeSource::setTimebaseAndInterval(double timebase, double inte
rvalSeconds) | 115 void CCDelayBasedTimeSource::setTimebaseAndInterval(double timebase, double inte
rvalSeconds) |
| 106 { | 116 { |
| 107 m_nextParameters.interval = intervalSeconds; | 117 m_nextParameters.interval = intervalSeconds; |
| 108 m_nextParameters.tickTarget = timebase; | 118 m_nextParameters.tickTarget = timebase; |
| 109 m_hasTickTarget = true; | 119 m_hasTickTarget = true; |
| 110 | 120 |
| 111 if (m_state != STATE_ACTIVE) { | 121 if (m_state != STATE_ACTIVE) { |
| 112 // If we aren't active, there's no need to reset the timer. | 122 // If we aren't active, there's no need to reset the timer. |
| 113 return; | 123 return; |
| 114 } | 124 } |
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| 212 // Post another task *before* the tick and update state | 222 // Post another task *before* the tick and update state |
| 213 double delay = newTickTarget - now; | 223 double delay = newTickTarget - now; |
| 214 ASSERT(delay <= m_nextParameters.interval * (1.0 + doubleTickThreshold)); | 224 ASSERT(delay <= m_nextParameters.interval * (1.0 + doubleTickThreshold)); |
| 215 m_timer.startOneShot(delay); | 225 m_timer.startOneShot(delay); |
| 216 | 226 |
| 217 m_nextParameters.tickTarget = newTickTarget; | 227 m_nextParameters.tickTarget = newTickTarget; |
| 218 m_currentParameters = m_nextParameters; | 228 m_currentParameters = m_nextParameters; |
| 219 } | 229 } |
| 220 | 230 |
| 221 } | 231 } |
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