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 
sharedMemory()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