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Diffstat (limited to 'Source/JavaScriptCore/wtf/gobject/GOwnPtr.h')
-rw-r--r-- | Source/JavaScriptCore/wtf/gobject/GOwnPtr.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/wtf/gobject/GOwnPtr.h b/Source/JavaScriptCore/wtf/gobject/GOwnPtr.h new file mode 100644 index 0000000..cec3e43 --- /dev/null +++ b/Source/JavaScriptCore/wtf/gobject/GOwnPtr.h @@ -0,0 +1,143 @@ +/* + * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. + * Copyright (C) 2008 Collabora Ltd. + * + * 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 GOwnPtr_h +#define GOwnPtr_h + +#if ENABLE(GLIB_SUPPORT) + +#include <algorithm> +#include <wtf/Assertions.h> +#include <wtf/Noncopyable.h> + +extern "C" void g_free(void*); + +namespace WTF { + +template <typename T> inline void freeOwnedGPtr(T* ptr); +template<> void freeOwnedGPtr<GError>(GError*); +template<> void freeOwnedGPtr<GList>(GList*); +template<> void freeOwnedGPtr<GCond>(GCond*); +template<> void freeOwnedGPtr<GMutex>(GMutex*); +template<> void freeOwnedGPtr<GPatternSpec>(GPatternSpec*); +template<> void freeOwnedGPtr<GDir>(GDir*); +template<> void freeOwnedGPtr<GFile>(GFile*); + +template <typename T> class GOwnPtr : public Noncopyable { +public: + explicit GOwnPtr(T* ptr = 0) : m_ptr(ptr) { } + ~GOwnPtr() { freeOwnedGPtr(m_ptr); } + + T* get() const { return m_ptr; } + T* release() + { + T* ptr = m_ptr; + m_ptr = 0; + return ptr; + } + + T*& outPtr() + { + ASSERT(!m_ptr); + return m_ptr; + } + + void set(T* ptr) + { + ASSERT(!ptr || m_ptr != ptr); + freeOwnedGPtr(m_ptr); + m_ptr = ptr; + } + + void clear() + { + T* ptr = m_ptr; + m_ptr = 0; + freeOwnedGPtr(ptr); + } + + T& operator*() const + { + ASSERT(m_ptr); + return *m_ptr; + } + + T* operator->() const + { + ASSERT(m_ptr); + return m_ptr; + } + + bool operator!() const { return !m_ptr; } + + // This conversion operator allows implicit conversion to bool but not to other integer types. + typedef T* GOwnPtr::*UnspecifiedBoolType; + operator UnspecifiedBoolType() const { return m_ptr ? &GOwnPtr::m_ptr : 0; } + + void swap(GOwnPtr& o) { std::swap(m_ptr, o.m_ptr); } + +private: + T* m_ptr; +}; + +template <typename T> inline void swap(GOwnPtr<T>& a, GOwnPtr<T>& b) +{ + a.swap(b); +} + +template <typename T, typename U> inline bool operator==(const GOwnPtr<T>& a, U* b) +{ + return a.get() == b; +} + +template <typename T, typename U> inline bool operator==(T* a, const GOwnPtr<U>& b) +{ + return a == b.get(); +} + +template <typename T, typename U> inline bool operator!=(const GOwnPtr<T>& a, U* b) +{ + return a.get() != b; +} + +template <typename T, typename U> inline bool operator!=(T* a, const GOwnPtr<U>& b) +{ + return a != b.get(); +} + +template <typename T> inline typename GOwnPtr<T>::PtrType getPtr(const GOwnPtr<T>& p) +{ + return p.get(); +} + +template <typename T> inline void freeOwnedGPtr(T* ptr) +{ + g_free(ptr); +} + +} // namespace WTF + +using WTF::GOwnPtr; + +#endif // ENABLE(GLIB_SUPPORT) + +#endif // GOwnPtr_h + |