text: /*
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "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 THE COPYRIGHT
  * OWNER 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 SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTGCEVENT_H_
  #define SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTGCEVENT_H_
  
  #include "sky/engine/wtf/Vector.h"
  #include "v8/include/v8.h"
  
  namespace blink {
  
  struct HeapInfo {
      HeapInfo()
          : usedJSHeapSize(0)
          , totalJSHeapSize(0)
          , jsHeapSizeLimit(0)
      {
      }
  
      size_t usedJSHeapSize;
      size_t totalJSHeapSize;
      size_t jsHeapSizeLimit;
  };
  
  class ScriptGCEventListener;
  
  class GCEventData {
  public:
      typedef Vector<ScriptGCEventListener*> GCEventListeners;
  
      GCEventData()
          : m_startTime(0.0)
          , m_usedHeapSize(0)
      { }
  
      void clear()
      {
          m_startTime = 0.0;
          m_usedHeapSize = 0;
      }
  
      GCEventListeners& listeners() { return m_listeners; }
  
      double startTime() { return m_startTime; }
      void setStartTime(double startTime) { m_startTime = startTime; }
      size_t usedHeapSize() { return m_usedHeapSize; }
      void setUsedHeapSize(size_t usedHeapSize) { m_usedHeapSize = usedHeapSize; }
  
  private:
      double m_startTime;
      size_t m_usedHeapSize;
      GCEventListeners m_listeners;
  };
  
  
  // FIXME(361045): remove ScriptGCEvent once DevTools Timeline migrates to tracing.
  class ScriptGCEvent {
  public:
      static void addEventListener(ScriptGCEventListener*);
      static void removeEventListener(ScriptGCEventListener*);
      static void getHeapSize(HeapInfo&);
  
  private:
      static void gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags);
      static void gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags);
      static size_t getUsedHeapSize();
  };
  
  
  } // namespace blink
  
  #endif  // SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTGCEVENT_H_
  