1 files changed, 193 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/PlatformRefPtr.h b/JavaScriptCore/wtf/PlatformRefPtr.h
new file mode 100644
index 0000000..2d05ac9
--- /dev/null
+++ b/JavaScriptCore/wtf/PlatformRefPtr.h
@@ -0,0 +1,193 @@
+/*
+ *  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 PlatformRefPtr_h
+#define PlatformRefPtr_h
+
+#include "AlwaysInline.h"
+#include <algorithm>
+
+namespace WTF {
+
+enum PlatformRefPtrAdoptType { PlatformRefPtrAdopt };
+template <typename T> inline T* refPlatformPtr(T*);
+template <typename T> inline void derefPlatformPtr(T*);
+template <typename T> class PlatformRefPtr;
+template <typename T> PlatformRefPtr<T> adoptPlatformRef(T*);
+
+template <typename T> class PlatformRefPtr {
+public:
+    PlatformRefPtr() : m_ptr(0) { }
+
+    PlatformRefPtr(T* ptr)
+        : m_ptr(ptr)
+    {
+        if (ptr)
+            refPlatformPtr(ptr);
+    }
+
+    PlatformRefPtr(const PlatformRefPtr& o)
+        : m_ptr(o.m_ptr)
+    {
+        if (T* ptr = m_ptr)
+            refPlatformPtr(ptr);
+    }
+
+    template <typename U> PlatformRefPtr(const PlatformRefPtr<U>& o)
+        : m_ptr(o.get())
+    {
+        if (T* ptr = m_ptr)
+            refPlatformPtr(ptr);
+    }
+
+    ~PlatformRefPtr()
+    {
+        if (T* ptr = m_ptr)
+            derefPlatformPtr(ptr);
+    }
+
+    void clear()
+    {
+        T* ptr = m_ptr;
+        m_ptr = 0;
+        if (ptr)
+            derefPlatformPtr(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* PlatformRefPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return m_ptr ? &PlatformRefPtr::m_ptr : 0; }
+
+    PlatformRefPtr& operator=(const PlatformRefPtr&);
+    PlatformRefPtr& operator=(T*);
+    template <typename U> PlatformRefPtr& operator=(const PlatformRefPtr<U>&);
+
+    void swap(PlatformRefPtr&);
+    friend PlatformRefPtr adoptPlatformRef<T>(T*);
+
+private:
+    static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
+    // Adopting constructor.
+    PlatformRefPtr(T* ptr, PlatformRefPtrAdoptType) : m_ptr(ptr) {}
+
+    T* m_ptr;
+};
+
+template <typename T> inline PlatformRefPtr<T>& PlatformRefPtr<T>::operator=(const PlatformRefPtr<T>& o)
+{
+    T* optr = o.get();
+    if (optr)
+        refPlatformPtr(optr);
+    T* ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        derefPlatformPtr(ptr);
+    return *this;
+}
+
+template <typename T> inline PlatformRefPtr<T>& PlatformRefPtr<T>::operator=(T* optr)
+{
+    T* ptr = m_ptr;
+    if (optr)
+        refPlatformPtr(optr);
+    m_ptr = optr;
+    if (ptr)
+        derefPlatformPtr(ptr);
+    return *this;
+}
+
+template <class T> inline void PlatformRefPtr<T>::swap(PlatformRefPtr<T>& o)
+{
+    std::swap(m_ptr, o.m_ptr);
+}
+
+template <class T> inline void swap(PlatformRefPtr<T>& a, PlatformRefPtr<T>& b)
+{
+    a.swap(b);
+}
+
+template <typename T, typename U> inline bool operator==(const PlatformRefPtr<T>& a, const PlatformRefPtr<U>& b)
+{
+    return a.get() == b.get();
+}
+
+template <typename T, typename U> inline bool operator==(const PlatformRefPtr<T>& a, U* b)
+{
+    return a.get() == b;
+}
+
+template <typename T, typename U> inline bool operator==(T* a, const PlatformRefPtr<U>& b)
+{
+    return a == b.get();
+}
+
+template <typename T, typename U> inline bool operator!=(const PlatformRefPtr<T>& a, const PlatformRefPtr<U>& b)
+{
+    return a.get() != b.get();
+}
+
+template <typename T, typename U> inline bool operator!=(const PlatformRefPtr<T>& a, U* b)
+{
+    return a.get() != b;
+}
+
+template <typename T, typename U> inline bool operator!=(T* a, const PlatformRefPtr<U>& b)
+{
+    return a != b.get();
+}
+
+template <typename T, typename U> inline PlatformRefPtr<T> static_pointer_cast(const PlatformRefPtr<U>& p)
+{
+    return PlatformRefPtr<T>(static_cast<T*>(p.get()));
+}
+
+template <typename T, typename U> inline PlatformRefPtr<T> const_pointer_cast(const PlatformRefPtr<U>& p)
+{
+    return PlatformRefPtr<T>(const_cast<T*>(p.get()));
+}
+
+template <typename T> inline T* getPtr(const PlatformRefPtr<T>& p)
+{
+    return p.get();
+}
+
+template <typename T> PlatformRefPtr<T> adoptPlatformRef(T* p)
+{
+    return PlatformRefPtr<T>(p, PlatformRefPtrAdopt);
+}
+
+} // namespace WTF
+
+using WTF::PlatformRefPtr;
+using WTF::refPlatformPtr;
+using WTF::derefPlatformPtr;
+using WTF::adoptPlatformRef;
+using WTF::static_pointer_cast;
+using WTF::const_pointer_cast;
+
+#endif // PlatformRefPtr_h