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| 1 /* | 1 /* |
| 2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. | 2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. |
| 3 * Copyright (C) 2009 Google Inc. All rights reserved. | 3 * Copyright (C) 2009 Google Inc. All rights reserved. |
| 4 * | 4 * |
| 5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
| 6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
| 7 * are met: | 7 * are met: |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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| 25 */ | 25 */ |
| 26 | 26 |
| 27 #include "config.h" | 27 #include "config.h" |
| 28 #include "platform/Timer.h" | 28 #include "platform/Timer.h" |
| 29 | 29 |
| 30 #include "platform/PlatformThreadData.h" | 30 #include "platform/PlatformThreadData.h" |
| 31 #include "platform/ThreadTimers.h" | 31 #include "platform/ThreadTimers.h" |
| 32 #include "wtf/Atomics.h" | 32 #include "wtf/Atomics.h" |
| 33 #include "wtf/CurrentTime.h" | 33 #include "wtf/CurrentTime.h" |
| 34 #include "wtf/HashSet.h" | 34 #include "wtf/HashSet.h" |
| 35 #include <algorithm> |
| 35 #include <limits.h> | 36 #include <limits.h> |
| 37 #include <limits> |
| 36 #include <math.h> | 38 #include <math.h> |
| 37 #include <limits> | |
| 38 | 39 |
| 39 namespace blink { | 40 namespace blink { |
| 40 | 41 |
| 41 class TimerHeapReference; | 42 class TimerHeapReference; |
| 42 | 43 |
| 43 // Timers are stored in a heap data structure, used to implement a priority queu
e. | 44 // Timers are stored in a heap data structure, used to implement a priority queu
e. |
| 44 // This allows us to efficiently determine which timer needs to fire the soonest
. | 45 // This allows us to efficiently determine which timer needs to fire the soonest
. |
| 45 // Then we set a single shared system timer to fire at that time. | 46 // Then we set a single shared system timer to fire at that time. |
| 46 // | 47 // |
| 47 // When a timer's "next fire time" changes, we need to move it around in the pri
ority queue. | 48 // When a timer's "next fire time" changes, we need to move it around in the pri
ority queue. |
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| 399 setNextFireTime(m_unalignedNextFireTime); | 400 setNextFireTime(m_unalignedNextFireTime); |
| 400 } | 401 } |
| 401 | 402 |
| 402 double TimerBase::nextUnalignedFireInterval() const | 403 double TimerBase::nextUnalignedFireInterval() const |
| 403 { | 404 { |
| 404 ASSERT(isActive()); | 405 ASSERT(isActive()); |
| 405 return std::max(m_unalignedNextFireTime - monotonicallyIncreasingTime(), 0.0
); | 406 return std::max(m_unalignedNextFireTime - monotonicallyIncreasingTime(), 0.0
); |
| 406 } | 407 } |
| 407 | 408 |
| 408 } // namespace blink | 409 } // namespace blink |
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