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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef ThreadGlobalData_h
#define ThreadGlobalData_h
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/Noncopyable.h>
#include <wtf/text/StringHash.h>
#if ENABLE(WORKERS)
#include <wtf/ThreadSpecific.h>
#include <wtf/Threading.h>
using WTF::ThreadSpecific;
#endif
namespace WebCore {
class EventNames;
struct ICUConverterWrapper;
struct TECConverterWrapper;
class ThreadTimers;
class ThreadGlobalData {
WTF_MAKE_NONCOPYABLE(ThreadGlobalData);
public:
ThreadGlobalData();
~ThreadGlobalData();
void destroy(); // called on workers to clean up the ThreadGlobalData before the thread exits.
EventNames& eventNames() { return *m_eventNames; }
ThreadTimers& threadTimers() { return *m_threadTimers; }
#if USE(ICU_UNICODE)
ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
#endif
#if PLATFORM(MAC)
TECConverterWrapper& cachedConverterTEC() { return *m_cachedConverterTEC; }
#endif
private:
EventNames* m_eventNames;
ThreadTimers* m_threadTimers;
#ifndef NDEBUG
bool m_isMainThread;
#endif
#if USE(ICU_UNICODE)
ICUConverterWrapper* m_cachedConverterICU;
#endif
#if PLATFORM(MAC)
TECConverterWrapper* m_cachedConverterTEC;
#endif
#if ENABLE(WORKERS)
static ThreadSpecific<ThreadGlobalData>* staticData;
#else
static ThreadGlobalData* staticData;
#endif
friend ThreadGlobalData& threadGlobalData();
};
inline ThreadGlobalData& threadGlobalData()
{
// FIXME: Workers are not necessarily the only feature that make per-thread global data necessary.
// We need to check for e.g. database objects manipulating strings on secondary threads.
#if ENABLE(WORKERS)
// ThreadGlobalData is used on main thread before it could possibly be used on secondary ones, so there is no need for synchronization here.
if (!ThreadGlobalData::staticData)
ThreadGlobalData::staticData = new ThreadSpecific<ThreadGlobalData>;
return **ThreadGlobalData::staticData;
#else
if (!ThreadGlobalData::staticData) {
ThreadGlobalData::staticData = static_cast<ThreadGlobalData*>(fastMalloc(sizeof(ThreadGlobalData)));
// ThreadGlobalData constructor indirectly uses staticData, so we need to set up the memory before invoking it.
new (ThreadGlobalData::staticData) ThreadGlobalData;
}
return *ThreadGlobalData::staticData;
#endif
}
} // namespace WebCore
#endif // ThreadGlobalData_h
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