--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/wtf/gobject/GRefPtr.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,191 @@
+/*
+ *  Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *  Copyright (C) 2008 Collabora Ltd.
+ *  Copyright (C) 2009 Martin Robinson
+ *
+ *  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 WTF_GRefPtr_h
+#define WTF_GRefPtr_h
+
+#include "AlwaysInline.h"
+#include <algorithm>
+
+typedef struct _GHashTable GHashTable;
+typedef void* gpointer;
+extern "C" void g_object_unref(gpointer object);
+extern "C" gpointer  g_object_ref_sink(gpointer object);
+
+namespace WTF {
+
+enum GRefPtrAdoptType { GRefPtrAdopt };
+template <typename T> inline T* refGPtr(T*);
+template <typename T> inline void derefGPtr(T*);
+template <typename T> class GRefPtr;
+template <typename T> GRefPtr<T> adoptGRef(T*);
+template <> GHashTable* refGPtr(GHashTable* ptr);
+template <> void derefGPtr(GHashTable* ptr);
+
+template <typename T> class GRefPtr {
+public:
+    GRefPtr() : m_ptr(0) { }
+    GRefPtr(T* ptr) : m_ptr(ptr) { if (ptr) refGPtr(ptr); }
+    GRefPtr(const GRefPtr& o) : m_ptr(o.m_ptr) { if (T* ptr = m_ptr) refGPtr(ptr); }
+    template <typename U> GRefPtr(const GRefPtr<U>& o) : m_ptr(o.get()) { if (T* ptr = m_ptr) refGPtr(ptr); }
+
+    ~GRefPtr() { if (T* ptr = m_ptr) derefGPtr(ptr); }
+
+    void clear()
+    {
+        T* ptr = m_ptr;
+        m_ptr = 0;
+        if (ptr)
+            derefGPtr(ptr);
+    }
+
+    T* get() const { return m_ptr; }
+    T& operator*() const { return *m_ptr; }
+    ALWAYS_INLINE T* operator->() const { 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* GRefPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return m_ptr ? &GRefPtr::m_ptr : 0; }
+
+    GRefPtr& operator=(const GRefPtr&);
+    GRefPtr& operator=(T*);
+    template <typename U> GRefPtr& operator=(const GRefPtr<U>&);
+
+    void swap(GRefPtr&);
+    friend GRefPtr adoptGRef<T>(T*);
+
+private:
+    static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
+    // Adopting constructor.
+    GRefPtr(T* ptr, GRefPtrAdoptType) : m_ptr(ptr) {}
+
+    T* m_ptr;
+};
+
+template <typename T> inline GRefPtr<T>& GRefPtr<T>::operator=(const GRefPtr<T>& o)
+{
+    T* optr = o.get();
+    if (optr)
+        refGPtr(optr);
+    T* ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        derefGPtr(ptr);
+    return *this;
+}
+
+template <typename T> inline GRefPtr<T>& GRefPtr<T>::operator=(T* optr)
+{
+    T* ptr = m_ptr;
+    if (optr)
+        refGPtr(optr);
+    m_ptr = optr;
+    if (ptr)
+        derefGPtr(ptr);
+    return *this;
+}
+
+template <class T> inline void GRefPtr<T>::swap(GRefPtr<T>& o)
+{
+    std::swap(m_ptr, o.m_ptr);
+}
+
+template <class T> inline void swap(GRefPtr<T>& a, GRefPtr<T>& b)
+{
+    a.swap(b);
+}
+
+template <typename T, typename U> inline bool operator==(const GRefPtr<T>& a, const GRefPtr<U>& b)
+{
+    return a.get() == b.get();
+}
+
+template <typename T, typename U> inline bool operator==(const GRefPtr<T>& a, U* b)
+{
+    return a.get() == b;
+}
+
+template <typename T, typename U> inline bool operator==(T* a, const GRefPtr<U>& b)
+{
+    return a == b.get();
+}
+
+template <typename T, typename U> inline bool operator!=(const GRefPtr<T>& a, const GRefPtr<U>& b)
+{
+    return a.get() != b.get();
+}
+
+template <typename T, typename U> inline bool operator!=(const GRefPtr<T>& a, U* b)
+{
+    return a.get() != b;
+}
+
+template <typename T, typename U> inline bool operator!=(T* a, const GRefPtr<U>& b)
+{
+    return a != b.get();
+}
+
+template <typename T, typename U> inline GRefPtr<T> static_pointer_cast(const GRefPtr<U>& p)
+{
+    return GRefPtr<T>(static_cast<T*>(p.get()));
+}
+
+template <typename T, typename U> inline GRefPtr<T> const_pointer_cast(const GRefPtr<U>& p)
+{
+    return GRefPtr<T>(const_cast<T*>(p.get()));
+}
+
+template <typename T> inline T* getPtr(const GRefPtr<T>& p)
+{
+    return p.get();
+}
+
+template <typename T> GRefPtr<T> adoptGRef(T* p)
+{
+    return GRefPtr<T>(p, GRefPtrAdopt);
+}
+
+template <typename T> inline T* refGPtr(T* ptr)
+{
+    if (ptr)
+        g_object_ref_sink(ptr);
+    return ptr;
+}
+
+template <typename T> inline void derefGPtr(T* ptr)
+{
+    if (ptr)
+        g_object_unref(ptr);
+}
+
+} // namespace WTF
+
+using WTF::GRefPtr;
+using WTF::refGPtr;
+using WTF::derefGPtr;
+using WTF::adoptGRef;
+using WTF::static_pointer_cast;
+using WTF::const_pointer_cast;
+
+#endif // WTF_GRefPtr_h