1/*
2 * Copyright (C) 2008 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 COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27#ifndef WTFThreadData_h
28#define WTFThreadData_h
29
30#include "wtf/HashMap.h"
31#include "wtf/HashSet.h"
32#include "wtf/Noncopyable.h"
33#include "wtf/ThreadSpecific.h"
34#include "wtf/Threading.h"
35#include "wtf/WTFExport.h"
36#include "wtf/text/StringHash.h"
37
38namespace WTF {
39
40class AtomicStringTable;
41struct ICUConverterWrapper;
42
43typedef void (*AtomicStringTableDestructor)(AtomicStringTable*);
44
45class WTF_EXPORT WTFThreadData {
46    WTF_MAKE_NONCOPYABLE(WTFThreadData);
47public:
48    WTFThreadData();
49    ~WTFThreadData();
50
51    AtomicStringTable* atomicStringTable()
52    {
53        return m_atomicStringTable;
54    }
55
56    ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
57
58private:
59    AtomicStringTable* m_atomicStringTable;
60    AtomicStringTableDestructor m_atomicStringTableDestructor;
61    OwnPtr<ICUConverterWrapper> m_cachedConverterICU;
62
63    static ThreadSpecific<WTFThreadData>* staticData;
64    friend WTFThreadData& wtfThreadData();
65    friend class AtomicStringTable;
66};
67
68inline WTFThreadData& wtfThreadData()
69{
70    // WRT WebCore:
71    //    WTFThreadData is used on main thread before it could possibly be used
72    //    on secondary ones, so there is no need for synchronization here.
73    // WRT JavaScriptCore:
74    //    wtfThreadData() is initially called from initializeThreading(), ensuring
75    //    this is initially called in a pthread_once locked context.
76    if (!WTFThreadData::staticData)
77        WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
78    return **WTFThreadData::staticData;
79}
80
81} // namespace WTF
82
83using WTF::WTFThreadData;
84using WTF::wtfThreadData;
85
86#endif // WTFThreadData_h
87