diff options
Diffstat (limited to 'WebCore/platform/TreeShared.h')
-rw-r--r-- | WebCore/platform/TreeShared.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/WebCore/platform/TreeShared.h b/WebCore/platform/TreeShared.h deleted file mode 100644 index 9d9ac1f..0000000 --- a/WebCore/platform/TreeShared.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public License - * along with this library; see the file COPYING.LIB. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301, USA. - * - */ - -#ifndef TreeShared_h -#define TreeShared_h - -#include <wtf/Assertions.h> -#include <wtf/Noncopyable.h> -#include <wtf/Threading.h> - -namespace WebCore { - -#ifndef NDEBUG -template<typename T> class TreeShared; -template<typename T> void adopted(TreeShared<T>*); -#endif - -template<typename T> class TreeShared : public Noncopyable { -public: - TreeShared() - : m_refCount(1) - , m_parent(0) -#ifndef NDEBUG - , m_adoptionIsRequired(true) -#endif - { - ASSERT(isMainThread()); -#ifndef NDEBUG - m_deletionHasBegun = false; - m_inRemovedLastRefFunction = false; -#endif - } - virtual ~TreeShared() - { - ASSERT(isMainThread()); - ASSERT(!m_refCount); - ASSERT(m_deletionHasBegun); - ASSERT(!m_adoptionIsRequired); - } - - void ref() - { - ASSERT(isMainThread()); - ASSERT(!m_deletionHasBegun); - ASSERT(!m_inRemovedLastRefFunction); - ASSERT(!m_adoptionIsRequired); - ++m_refCount; - } - - void deref() - { - ASSERT(isMainThread()); - ASSERT(m_refCount >= 0); - ASSERT(!m_deletionHasBegun); - ASSERT(!m_inRemovedLastRefFunction); - ASSERT(!m_adoptionIsRequired); - if (--m_refCount <= 0 && !m_parent) { -#ifndef NDEBUG - m_inRemovedLastRefFunction = true; -#endif - removedLastRef(); - } - } - - bool hasOneRef() const - { - ASSERT(!m_deletionHasBegun); - ASSERT(!m_inRemovedLastRefFunction); - return m_refCount == 1; - } - - int refCount() const - { - return m_refCount; - } - - void setParent(T* parent) - { - ASSERT(isMainThread()); - m_parent = parent; - } - - T* parent() const - { - ASSERT(isMainThread()); - return m_parent; - } - -#ifndef NDEBUG - bool m_deletionHasBegun; - bool m_inRemovedLastRefFunction; -#endif - -private: -#ifndef NDEBUG - friend void adopted<>(TreeShared<T>*); -#endif - - virtual void removedLastRef() - { -#ifndef NDEBUG - m_deletionHasBegun = true; -#endif - delete this; - } - - int m_refCount; - T* m_parent; -#ifndef NDEBUG - bool m_adoptionIsRequired; -#endif -}; - -#ifndef NDEBUG - -template<typename T> inline void adopted(TreeShared<T>* object) -{ - if (!object) - return; - ASSERT(!object->m_deletionHasBegun); - ASSERT(!object->m_inRemovedLastRefFunction); - object->m_adoptionIsRequired = false; -} - -#endif - -} - -#endif // TreeShared.h |