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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc. All Rights Reserved.
      3  * Copyright (C) 2008 Collabora, Ltd. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef PluginMessageThrottlerWin_h
     28 #define PluginMessageThrottlerWin_h
     29 
     30 #include "Timer.h"
     31 
     32 #include <windows.h>
     33 
     34 namespace WebCore {
     35     class PluginView;
     36 
     37     struct PluginMessage {
     38         HWND hWnd;
     39         UINT msg;
     40         WPARAM wParam;
     41         LPARAM lParam;
     42 
     43         struct PluginMessage* next;
     44     };
     45 
     46     class PluginMessageThrottlerWin {
     47     public:
     48         PluginMessageThrottlerWin(PluginView*);
     49         ~PluginMessageThrottlerWin();
     50 
     51         void appendMessage(HWND, UINT msg, WPARAM, LPARAM);
     52 
     53     private:
     54         void messageThrottleTimerFired(Timer<PluginMessageThrottlerWin>*);
     55         PluginMessage* allocateMessage();
     56         bool isInlineMessage(PluginMessage* message);
     57         void freeMessage(PluginMessage* message);
     58 
     59         PluginView* m_pluginView;
     60         PluginMessage* m_back;
     61         PluginMessage* m_front;
     62 
     63         static const int NumInlineMessages = 4;
     64         PluginMessage m_inlineMessages[NumInlineMessages];
     65         PluginMessage* m_freeInlineMessages;
     66 
     67         Timer<PluginMessageThrottlerWin> m_messageThrottleTimer;
     68     };
     69 
     70 } // namespace WebCore
     71 
     72 #endif // PluginMessageThrottlerWin_h
     73