| // 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_TIME_SOURCE_H_ |
| #define CC_TIME_SOURCE_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/time.h" |
| #include "cc/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*) = 0; |
| virtual void setActive(bool) = 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_TIME_SOURCE_H_ |