author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:13:44 +0300 | |
branch | RCL_3 |
changeset 70 | 8bfb9186a8b8 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
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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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|
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#ifndef Shared_h |
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#define Shared_h |
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|
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#include <wtf/Assertions.h> |
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#include <wtf/Noncopyable.h> |
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namespace WebCore { |
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|
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template<class T> class Shared : Noncopyable { |
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public: |
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Shared() |
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: m_refCount(0) |
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#ifndef NDEBUG |
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, m_deletionHasBegun(false) |
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#endif |
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{ |
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} |
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void ref() |
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{ |
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ASSERT(!m_deletionHasBegun); |
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++m_refCount; |
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} |
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void deref() |
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{ |
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ASSERT(!m_deletionHasBegun); |
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if (--m_refCount <= 0) { |
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#ifndef NDEBUG |
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m_deletionHasBegun = true; |
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#endif |
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delete static_cast<T*>(this); |
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} |
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} |
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bool hasOneRef() |
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{ |
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ASSERT(!m_deletionHasBegun); |
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return m_refCount == 1; |
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} |
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int refCount() const |
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{ |
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return m_refCount; |
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} |
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|
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private: |
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int m_refCount; |
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#ifndef NDEBUG |
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bool m_deletionHasBegun; |
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#endif |
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}; |
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template<class T> class TreeShared : Noncopyable { |
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public: |
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TreeShared() |
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: m_refCount(0) |
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, m_parent(0) |
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{ |
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#ifndef NDEBUG |
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m_deletionHasBegun = false; |
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m_inRemovedLastRefFunction = false; |
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#endif |
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} |
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TreeShared(T* parent) |
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: m_refCount(0) |
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, m_parent(0) |
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{ |
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#ifndef NDEBUG |
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m_deletionHasBegun = false; |
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m_inRemovedLastRefFunction = false; |
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#endif |
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} |
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virtual ~TreeShared() |
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{ |
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ASSERT(m_deletionHasBegun); |
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} |
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|
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void ref() |
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{ |
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ASSERT(!m_deletionHasBegun); |
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ASSERT(!m_inRemovedLastRefFunction); |
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++m_refCount; |
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} |
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void deref() |
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{ |
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ASSERT(!m_deletionHasBegun); |
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ASSERT(!m_inRemovedLastRefFunction); |
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if (--m_refCount <= 0 && !m_parent) { |
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#ifndef NDEBUG |
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m_inRemovedLastRefFunction = true; |
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#endif |
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removedLastRef(); |
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} |
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} |
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bool hasOneRef() const |
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{ |
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ASSERT(!m_deletionHasBegun); |
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ASSERT(!m_inRemovedLastRefFunction); |
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return m_refCount == 1; |
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} |
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int refCount() const |
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{ |
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return m_refCount; |
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} |
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void setParent(T* parent) { m_parent = parent; } |
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T* parent() const { return m_parent; } |
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|
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#ifndef NDEBUG |
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bool m_deletionHasBegun; |
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bool m_inRemovedLastRefFunction; |
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#endif |
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private: |
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virtual void removedLastRef() |
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{ |
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#ifndef NDEBUG |
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m_deletionHasBegun = true; |
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#endif |
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delete this; |
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} |
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int m_refCount; |
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T* m_parent; |
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}; |
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} |
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#endif |