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author | Zeno Albisser <zeno.albisser@digia.com> | 2013-08-15 21:46:11 +0200 |
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committer | Zeno Albisser <zeno.albisser@digia.com> | 2013-08-15 21:46:11 +0200 |
commit | 679147eead574d186ebf3069647b4c23e8ccace6 (patch) | |
tree | fc247a0ac8ff119f7c8550879ebb6d3dd8d1ff69 /chromium/cc/scheduler/time_source.h | |
download | qtwebengine-chromium-679147eead574d186ebf3069647b4c23e8ccace6.tar.gz |
Initial import.
Diffstat (limited to 'chromium/cc/scheduler/time_source.h')
-rw-r--r-- | chromium/cc/scheduler/time_source.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/chromium/cc/scheduler/time_source.h b/chromium/cc/scheduler/time_source.h new file mode 100644 index 00000000000..e45ffbb95aa --- /dev/null +++ b/chromium/cc/scheduler/time_source.h @@ -0,0 +1,51 @@ +// Copyright 2011 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef CC_SCHEDULER_TIME_SOURCE_H_ +#define CC_SCHEDULER_TIME_SOURCE_H_ + +#include "base/memory/ref_counted.h" +#include "base/time/time.h" +#include "cc/base/cc_export.h" + +namespace cc { + +class TimeSourceClient { + public: + virtual void OnTimerTick() = 0; + + protected: + virtual ~TimeSourceClient() {} +}; + +// An generic interface for getting a reliably-ticking timesource of +// a specified rate. +// +// Be sure to call SetActive(false) before releasing your reference to the +// timer, or it will keep on ticking! +class CC_EXPORT TimeSource : public base::RefCounted<TimeSource> { + public: + virtual void SetClient(TimeSourceClient* client) = 0; + + // If transitioning from not active to active, SetActive will return the + // timestamp of the most recenly missed tick that did not have OnTimerTick + // called. + virtual base::TimeTicks SetActive(bool active) = 0; + + virtual bool Active() const = 0; + virtual void SetTimebaseAndInterval(base::TimeTicks timebase, + base::TimeDelta interval) = 0; + virtual base::TimeTicks LastTickTime() = 0; + virtual base::TimeTicks NextTickTime() = 0; + + protected: + virtual ~TimeSource() {} + + private: + friend class base::RefCounted<TimeSource>; +}; + +} // namespace cc + +#endif // CC_SCHEDULER_TIME_SOURCE_H_ |