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author | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
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committer | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
commit | d8543bb6618c17b12da906afa77d216f58cf4058 (patch) | |
tree | c58dc05ed86825bd0ef8d305d58c8205106b540f /JavaScriptCore/wtf/RefCounted.h | |
download | external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.zip external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.gz external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.bz2 |
external/webkit r30707
Diffstat (limited to 'JavaScriptCore/wtf/RefCounted.h')
-rw-r--r-- | JavaScriptCore/wtf/RefCounted.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/RefCounted.h b/JavaScriptCore/wtf/RefCounted.h new file mode 100644 index 0000000..8f05b0f --- /dev/null +++ b/JavaScriptCore/wtf/RefCounted.h @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2006, 2007, 2008 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 RefCounted_h +#define RefCounted_h + +#include <wtf/Assertions.h> +#include <wtf/Noncopyable.h> + +namespace WTF { + +template<class T> class RefCounted : Noncopyable { +public: + RefCounted(int initialRefCount = 1) + : m_refCount(initialRefCount) +#ifndef NDEBUG + , m_deletionHasBegun(false) +#endif + { + } + + void ref() + { + ASSERT(!m_deletionHasBegun); + ++m_refCount; + } + + void deref() + { + ASSERT(!m_deletionHasBegun); + ASSERT(m_refCount > 0); + if (m_refCount == 1) { +#ifndef NDEBUG + m_deletionHasBegun = true; +#endif + delete static_cast<T*>(this); + } else + --m_refCount; + } + + bool hasOneRef() + { + ASSERT(!m_deletionHasBegun); + return m_refCount == 1; + } + + int refCount() const + { + return m_refCount; + } + +private: + int m_refCount; +#ifndef NDEBUG + bool m_deletionHasBegun; +#endif +}; + +} // namespace WTF + +using WTF::RefCounted; + +#endif // RefCounted_h |