--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/JavaScriptCore/wtf/PassRefPtr.h Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,193 @@
+// -*- mode: c++; c-basic-offset: 4 -*-
+/*
+ * This file is part of the KDE libraries
+ * Copyright (C) 2005, 2006 Apple Computer, Inc.
+ *
+ * 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_PassRefPtr_h
+#define WTF_PassRefPtr_h
+
+namespace WTF {
+
+ template<typename T> class RefPtr;
+ template<typename T> class PassRefPtr;
+ template <typename T> PassRefPtr<T> adoptRef(T*);
+
+ template<typename T>
+ class PassRefPtr
+ {
+ public:
+ PassRefPtr() : m_ptr(0) {}
+ PassRefPtr(T* ptr) : m_ptr(ptr) { if (ptr) ptr->ref(); }
+ // It somewhat breaks the type system to allow transfer of ownership out of
+ // a const PassRefPtr. However, it makes it much easier to work with PassRefPtr
+ // temporaries, and we don't really have a need to use real const PassRefPtrs
+ // anyway.
+ PassRefPtr(const PassRefPtr& o) : m_ptr(o.releaseRef()) {}
+ template <typename U> PassRefPtr(const PassRefPtr<U>& o) : m_ptr(o.releaseRef()) { }
+
+ ~PassRefPtr() { if (T* ptr = m_ptr) ptr->deref(); }
+
+ template <class U>
+ PassRefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { if (T* ptr = m_ptr) ptr->ref(); }
+
+ T* get() const { return m_ptr; }
+
+ T* releaseRef() const { T* tmp = m_ptr; m_ptr = 0; return tmp; }
+
+ T& operator*() const { return *m_ptr; }
+ 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* (PassRefPtr::*UnspecifiedBoolType)() const;
+ operator UnspecifiedBoolType() const { return m_ptr ? &PassRefPtr::get : 0; }
+
+ PassRefPtr& operator=(T*);
+ PassRefPtr& operator=(const PassRefPtr&);
+ template <typename U> PassRefPtr& operator=(const PassRefPtr<U>&);
+ template <typename U> PassRefPtr& operator=(const RefPtr<U>&);
+
+ friend PassRefPtr adoptRef<T>(T*);
+ private:
+ // adopting constructor
+ PassRefPtr(T* ptr, bool) : m_ptr(ptr) {}
+ mutable T* m_ptr;
+ };
+
+ template <typename T> template <typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const RefPtr<U>& o)
+ {
+ T* optr = o.get();
+ if (optr)
+ optr->ref();
+ T* ptr = m_ptr;
+ m_ptr = optr;
+ if (ptr)
+ ptr->deref();
+ return *this;
+ }
+
+ template <typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(T* optr)
+ {
+ if (optr)
+ optr->ref();
+ T* ptr = m_ptr;
+ m_ptr = optr;
+ if (ptr)
+ ptr->deref();
+ return *this;
+ }
+
+ template <typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<T>& ref)
+ {
+ T* ptr = m_ptr;
+ m_ptr = ref.releaseRef();
+ if (ptr)
+ ptr->deref();
+ return *this;
+ }
+
+ template <typename T> template <typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<U>& ref)
+ {
+ T* ptr = m_ptr;
+ m_ptr = ref.releaseRef();
+ if (ptr)
+ ptr->deref();
+ return *this;
+ }
+
+ template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
+ {
+ return a.get() == b.get();
+ }
+
+ template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const RefPtr<U>& b)
+ {
+ return a.get() == b.get();
+ }
+
+ template <typename T, typename U> inline bool operator==(const RefPtr<T>& a, const PassRefPtr<U>& b)
+ {
+ return a.get() == b.get();
+ }
+
+ template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, U* b)
+ {
+ return a.get() == b;
+ }
+
+ template <typename T, typename U> inline bool operator==(T* a, const PassRefPtr<U>& b)
+ {
+ return a == b.get();
+ }
+
+ template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
+ {
+ return a.get() != b.get();
+ }
+
+ template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const RefPtr<U>& b)
+ {
+ return a.get() != b.get();
+ }
+
+ template <typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const PassRefPtr<U>& b)
+ {
+ return a.get() != b.get();
+ }
+
+ template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, U* b)
+ {
+ return a.get() != b;
+ }
+
+ template <typename T, typename U> inline bool operator!=(T* a, const PassRefPtr<U>& b)
+ {
+ return a != b.get();
+ }
+
+ template <typename T> inline PassRefPtr<T> adoptRef(T* p)
+ {
+ return PassRefPtr<T>(p, true);
+ }
+
+ template <typename T, typename U> inline PassRefPtr<T> static_pointer_cast(const PassRefPtr<U>& p)
+ {
+ return adoptRef(static_cast<T*>(p.releaseRef()));
+ }
+
+ template <typename T, typename U> inline PassRefPtr<T> const_pointer_cast(const PassRefPtr<U>& p)
+ {
+ return adoptRef(const_cast<T*>(p.releaseRef()));
+ }
+
+ template <typename T> inline T* getPtr(const PassRefPtr<T>& p)
+ {
+ return p.get();
+ }
+
+} // namespace WTF
+
+using WTF::PassRefPtr;
+using WTF::adoptRef;
+using WTF::static_pointer_cast;
+using WTF::const_pointer_cast;
+
+#endif // WTF_PassRefPtr_h