/* * 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. * */ #include "config.h" #include "ThreadGlobalData.h" #include "EventNames.h" #include "StringImpl.h" #include "ThreadTimers.h" #include <wtf/UnusedParam.h> #if USE(ICU_UNICODE) || USE(GLIB_ICU_UNICODE_HYBRID) #include "TextCodecICU.h" #endif #if PLATFORM(MAC) #include "TextCodecMac.h" #endif #if ENABLE(WORKERS) #include <wtf/Threading.h> #include <wtf/ThreadSpecific.h> using namespace WTF; #endif namespace WebCore { 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. static ThreadGlobalData* staticData; if (!staticData) { staticData = static_cast<ThreadGlobalData*>(fastMalloc(sizeof(ThreadGlobalData))); // ThreadGlobalData constructor indirectly uses staticData, so we need to set up the memory before invoking it. new (staticData) ThreadGlobalData; } return *staticData; } ThreadGlobalData::ThreadGlobalData() : m_emptyString(new StringImpl) , m_atomicStringTable(new HashSet<StringImpl*>) , m_eventNames(new EventNames) , m_threadTimers(new ThreadTimers) #ifndef NDEBUG , m_isMainThread(isMainThread()) #endif #if USE(ICU_UNICODE) || USE(GLIB_ICU_UNICODE_HYBRID) , m_cachedConverterICU(new ICUConverterWrapper) #endif { } ThreadGlobalData::~ThreadGlobalData() { #if USE(ICU_UNICODE) || USE(GLIB_ICU_UNICODE_HYBRID) delete m_cachedConverterICU; #endif delete m_eventNames; delete m_atomicStringTable; delete m_threadTimers; // Using member variable m_isMainThread instead of calling WTF::isMainThread() directly // to avoid issues described in https://bugs.webkit.org/show_bug.cgi?id=25973. // In short, some pthread-based platforms and ports can not use WTF::CurrentThread() and WTF::isMainThread() // in destructors of thread-specific data. ASSERT(m_isMainThread || m_emptyString->hasOneRef()); // We intentionally don't clean up static data on application quit, so there will be many strings remaining on the main thread. delete m_emptyString; } } // namespace WebCore