Implement timers by posting delayed tasks

Source/platform/SharedTimer.h

-/*
- * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SharedTimer_h
-#define SharedTimer_h
-
-#include "platform/PlatformExport.h"
-#include "wtf/FastAllocBase.h"
-#include "wtf/Noncopyable.h"
-
-namespace blink {
-
-// Each thread has its own single instance of shared timer, which implements this interface.
-// This instance is shared by all timers in the thread.
-// Not intended to be used directly; use the Timer class instead.
-class PLATFORM_EXPORT SharedTimer {
-    WTF_MAKE_NONCOPYABLE(SharedTimer); WTF_MAKE_FAST_ALLOCATED(SharedTimer);
-public:
-    SharedTimer() { }
-    virtual ~SharedTimer() {}
-    virtual void setFiredFunction(void (*)()) = 0;
-
-    // The fire interval is in seconds relative to the current monotonic clock time.
-    virtual void setFireInterval(double) = 0;
-    virtual void stop() = 0;
-};
-
-
-PLATFORM_EXPORT void setSharedTimerFiredFunction(void (*)());
-PLATFORM_EXPORT void setSharedTimerFireInterval(double);
-PLATFORM_EXPORT void stopSharedTimer();
-
-class PLATFORM_EXPORT MainThreadSharedTimer : public SharedTimer {
-public:
-    virtual void setFiredFunction(void (*function)()) override
-    {
-        setSharedTimerFiredFunction(function);
-    }
-
-    virtual void setFireInterval(double interval) override
-    {
-        setSharedTimerFireInterval(interval);
-    }
-
-    virtual void stop() override
-    {
-        stopSharedTimer();
-    }
-};
-
-} // namespace blink
-
-#endif // SharedTimer_h