third_party/WebKit/Source/core/frame/SuspendableTimer.h

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  */
  26
  27 #ifndef SuspendableTimer_h
  28 #define SuspendableTimer_h
  29
  30 #include "core/CoreExport.h"
  31 #include "core/dom/ActiveDOMObject.h"
  32 #include "platform/Timer.h"
  33
  34 namespace blink {
  35
  36 class CORE_EXPORT SuspendableTimer : public TimerBase, public ActiveDOMObject {
  37 public:
  38     explicit SuspendableTimer(ExecutionContext*);
  39     ~SuspendableTimer() override;
  40
  41     // ActiveDOMObject
  42     bool hasPendingActivity() const final;
  43     void stop() override;
  44     void suspend() final;
  45     void resume() final;
  46
  47 private:
  48     void fired() override = 0;
  49
  50     double m_nextFireInterval;
  51     double m_repeatInterval;
  52 #if ENABLE(ASSERT)
  53     bool m_suspended;
  54 #endif
  55 };
  56
  57 } // namespace blink
  58
  59 #endif // SuspendableTimer_h