API/JSWeakObjectMapRefInternal.h

   1 /*
   2  * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef JSWeakObjectMapRefInternal_h
  27 #define JSWeakObjectMapRefInternal_h
  28
  29 #include "WeakGCMap.h"
  30 #include <wtf/RefCounted.h>
  31
  32 namespace JSC {
  33
  34 class JSObject;
  35
  36 }
  37
  38 typedef void (*JSWeakMapDestroyedCallback)(struct OpaqueJSWeakObjectMap*, void*);
  39
  40 typedef JSC::WeakGCMap<void*, JSC::JSObject*> WeakMapType;
  41
  42 struct OpaqueJSWeakObjectMap : public RefCounted<OpaqueJSWeakObjectMap> {
  43 public:
  44     static PassRefPtr<OpaqueJSWeakObjectMap> create(void* data, JSWeakMapDestroyedCallback callback)
  45     {
  46         return adoptRef(new OpaqueJSWeakObjectMap(data, callback));
  47     }
  48
  49     WeakMapType& map() { return m_map; }
  50
  51     ~OpaqueJSWeakObjectMap()
  52     {
  53         m_callback(this, m_data);
  54     }
  55
  56 private:
  57     OpaqueJSWeakObjectMap(void* data, JSWeakMapDestroyedCallback callback)
  58         : m_data(data)
  59         , m_callback(callback)
  60     {
  61     }
  62     WeakMapType m_map;
  63     void* m_data;
  64     JSWeakMapDestroyedCallback m_callback;
  65 };
  66
  67
  68 #endif // JSWeakObjectMapInternal_h