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      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 VisitedLinkTable_h
     27 #define VisitedLinkTable_h
     28 
     29 #include <WebCore/LinkHash.h>
     30 #include <wtf/PassRefPtr.h>
     31 #include <wtf/RefPtr.h>
     32 
     33 namespace WebKit {
     34 
     35 class SharedMemory;
     36 
     37 class VisitedLinkTable {
     38 public:
     39     VisitedLinkTable();
     40     ~VisitedLinkTable();
     41 
     42     void setSharedMemory(PassRefPtr<SharedMemory>);
     43 
     44     // This should only be called from the UI process.
     45     bool addLinkHash(WebCore::LinkHash);
     46 
     47     bool isLinkVisited(WebCore::LinkHash) const;
     48 
     49     SharedMemory* sharedMemory() const { return m_sharedMemory.get(); }
     50 
     51 private:
     52     RefPtr<SharedMemory> m_sharedMemory;
     53 
     54     unsigned m_tableSize;
     55     unsigned m_tableSizeMask;
     56     WebCore::LinkHash* m_table;
     57 };
     58 
     59 }
     60 
     61 #endif // VisitedLinkTable_h
     62