diff -r 000000000000 -r 4f2f89ce4247 WebKit2/UIProcess/API/cpp/WKRetainPtr.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit2/UIProcess/API/cpp/WKRetainPtr.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WKRetainPtr_h
+#define WKRetainPtr_h
+
+#include <algorithm>
+
+namespace WebKit {
+
+enum WKAdoptTag { AdoptWK };
+
+template <typename T>
+class WKRetainPtr {
+public:
+    typedef T PtrType;
+
+    WKRetainPtr()
+        : m_ptr(0)
+    {
+    }
+
+    WKRetainPtr(PtrType ptr)
+        : m_ptr(ptr)
+    {
+        if (ptr)
+            WKRetain(ptr);
+    }
+
+    WKRetainPtr(WKAdoptTag, PtrType ptr)
+        : m_ptr(ptr)
+    {
+    }
+    
+    template <typename U>
+    WKRetainPtr(const WKRetainPtr<U>& o)
+        : m_ptr(o.get())
+    {
+        if (PtrType ptr = m_ptr)
+            WKRetain(ptr);
+    }
+    
+    WKRetainPtr(const WKRetainPtr& o)
+        : m_ptr(o.m_ptr)
+    {
+        if (PtrType ptr = m_ptr)
+            WKRetain(ptr);
+    }
+
+    ~WKRetainPtr()
+    {
+        if (PtrType ptr = m_ptr)
+            WKRelease(ptr);
+    }
+
+    PtrType get() const { return m_ptr; }
+    PtrType releaseRef() { PtrType tmp = m_ptr; m_ptr = 0; return tmp; }
+    
+    PtrType 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 PtrType WKRetainPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return m_ptr ? &WKRetainPtr::m_ptr : 0; }
+
+    WKRetainPtr& operator=(const WKRetainPtr&);
+    template <typename U> WKRetainPtr& operator=(const WKRetainPtr<U>&);
+    WKRetainPtr& operator=(PtrType);
+    template <typename U> WKRetainPtr& operator=(U*);
+
+    void adopt(PtrType);
+    void swap(WKRetainPtr&);
+
+private:
+    PtrType m_ptr;
+};
+
+template <typename T> inline WKRetainPtr<T>& WKRetainPtr<T>::operator=(const WKRetainPtr<T>& o)
+{
+    PtrType optr = o.get();
+    if (optr)
+        WKRetain(optr);
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        WKRelease(ptr);
+    return *this;
+}
+
+template <typename T> template <typename U> inline WKRetainPtr<T>& WKRetainPtr<T>::operator=(const WKRetainPtr<U>& o)
+{
+    PtrType optr = o.get();
+    if (optr)
+        WKRetain(optr);
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        WKRelease(ptr);
+    return *this;
+}
+
+template <typename T> inline WKRetainPtr<T>& WKRetainPtr<T>::operator=(PtrType optr)
+{
+    if (optr)
+        WKRetain(optr);
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        WKRelease(ptr);
+    return *this;
+}
+
+template <typename T> inline void WKRetainPtr<T>::adopt(PtrType optr)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        WKRelease(ptr);
+}
+
+template <typename T> template <typename U> inline WKRetainPtr<T>& WKRetainPtr<T>::operator=(U* optr)
+{
+    if (optr)
+        WKRetain(optr);
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        WKRelease(ptr);
+    return *this;
+}
+
+template <class T> inline void WKRetainPtr<T>::swap(WKRetainPtr<T>& o)
+{
+    std::swap(m_ptr, o.m_ptr);
+}
+
+template <class T> inline void swap(WKRetainPtr<T>& a, WKRetainPtr<T>& b)
+{
+    a.swap(b);
+}
+
+template <typename T, typename U> inline bool operator==(const WKRetainPtr<T>& a, const WKRetainPtr<U>& b)
+{ 
+    return a.get() == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator==(const WKRetainPtr<T>& a, U* b)
+{ 
+    return a.get() == b; 
+}
+
+template <typename T, typename U> inline bool operator==(T* a, const WKRetainPtr<U>& b) 
+{
+    return a == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const WKRetainPtr<T>& a, const WKRetainPtr<U>& b)
+{ 
+    return a.get() != b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const WKRetainPtr<T>& a, U* b)
+{
+    return a.get() != b; 
+}
+
+template <typename T, typename U> inline bool operator!=(T* a, const WKRetainPtr<U>& b)
+{ 
+    return a != b.get(); 
+}
+
+} // namespace WebKit
+
+using WebKit::WKRetainPtr;
+using WebKit::AdoptWK;
+
+#endif // WKRetainPtr_h