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128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/*
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* Copyright (C) 2009 Jian Li <jianli@chromium.org>
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* Copyright (C) 2012 Patrick Gansterer <paroga@paroga.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "OperatingSystem.h"
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#include "ThreadSpecific.h"
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#if OS(WIN)
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#include "StdLibExtras.h"
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#include "ThreadingPrimitives.h"
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#include "wtf/DoublyLinkedList.h"
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namespace WTF {
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static DoublyLinkedList<PlatformThreadSpecificKey>& destructorsList() {
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DEFINE_STATIC_LOCAL(DoublyLinkedList<PlatformThreadSpecificKey>, staticList,
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());
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return staticList;
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}
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static Mutex& destructorsMutex() {
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DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
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return staticMutex;
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}
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class PlatformThreadSpecificKey
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: public DoublyLinkedListNode<PlatformThreadSpecificKey> {
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public:
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friend class DoublyLinkedListNode<PlatformThreadSpecificKey>;
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PlatformThreadSpecificKey(void (*destructor)(void*))
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: m_destructor(destructor) {
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m_tlsKey = TlsAlloc();
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if (m_tlsKey == TLS_OUT_OF_INDEXES)
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CRASH();
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}
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~PlatformThreadSpecificKey() { TlsFree(m_tlsKey); }
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void setValue(void* data) { TlsSetValue(m_tlsKey, data); }
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void* value() { return TlsGetValue(m_tlsKey); }
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void callDestructor() {
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if (void* data = value())
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m_destructor(data);
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}
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private:
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void (*m_destructor)(void*);
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DWORD m_tlsKey;
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PlatformThreadSpecificKey* m_prev;
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PlatformThreadSpecificKey* m_next;
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};
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long& tlsKeyCount() {
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static long count;
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return count;
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}
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DWORD* tlsKeys() {
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static DWORD keys[kMaxTlsKeySize];
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return keys;
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}
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void threadSpecificKeyCreate(ThreadSpecificKey* key,
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void (*destructor)(void*)) {
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*key = new PlatformThreadSpecificKey(destructor);
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MutexLocker locker(destructorsMutex());
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destructorsList().push(*key);
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}
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void threadSpecificKeyDelete(ThreadSpecificKey key) {
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MutexLocker locker(destructorsMutex());
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destructorsList().remove(key);
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delete key;
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}
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void threadSpecificSet(ThreadSpecificKey key, void* data) {
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key->setValue(data);
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}
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void* threadSpecificGet(ThreadSpecificKey key) {
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return key->value();
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}
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void ThreadSpecificThreadExit() {
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for (long i = 0; i < tlsKeyCount(); i++) {
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// The layout of ThreadSpecific<T>::Data does not depend on T. So we are
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// safe to do the static cast to ThreadSpecific<int> in order to access its
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// data member.
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ThreadSpecific<int>::Data* data =
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static_cast<ThreadSpecific<int>::Data*>(TlsGetValue(tlsKeys()[i]));
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if (data)
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data->destructor(data);
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}
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MutexLocker locker(destructorsMutex());
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PlatformThreadSpecificKey* key = destructorsList().head();
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while (key) {
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PlatformThreadSpecificKey* nextKey = key->next();
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key->callDestructor();
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key = nextKey;
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}
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}
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} // namespace WTF
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#endif // OS(WIN)
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