external/webkit r30707

1 files changed, 173 insertions, 0 deletions

diff --git a/JavaScriptCore/API/JSRetainPtr.h b/JavaScriptCore/API/JSRetainPtr.h
new file mode 100644
index 0000000..69c6de1
--- /dev/null
+++ b/JavaScriptCore/API/JSRetainPtr.h
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2005, 2006, 2007 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 JSRetainPtr_h
+#define JSRetainPtr_h
+
+#include <JavaScriptCore/JSStringRef.h>
+#include <algorithm>
+
+inline void JSRetain(JSStringRef string) { JSStringRetain(string); }
+inline void JSRelease(JSStringRef string) { JSStringRelease(string); }
+
+enum AdoptTag { Adopt };
+
+template <typename T> class JSRetainPtr {
+public:
+    JSRetainPtr() : m_ptr(0) {}
+    JSRetainPtr(T ptr) : m_ptr(ptr) { if (ptr) JSRetain(ptr); }
+
+    JSRetainPtr(AdoptTag, T ptr) : m_ptr(ptr) { }
+    
+    JSRetainPtr(const JSRetainPtr& o) : m_ptr(o.m_ptr) { if (T ptr = m_ptr) JSRetain(ptr); }
+
+    ~JSRetainPtr() { if (T ptr = m_ptr) JSRelease(ptr); }
+    
+    template <typename U> JSRetainPtr(const JSRetainPtr<U>& o) : m_ptr(o.get()) { if (T ptr = m_ptr) JSRetain(ptr); }
+    
+    T get() const { return m_ptr; }
+    
+    T releaseRef() { T tmp = m_ptr; m_ptr = 0; return tmp; }
+    
+    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 JSRetainPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return m_ptr ? &JSRetainPtr::m_ptr : 0; }
+    
+    JSRetainPtr& operator=(const JSRetainPtr&);
+    template <typename U> JSRetainPtr& operator=(const JSRetainPtr<U>&);
+    JSRetainPtr& operator=(T);
+    template <typename U> JSRetainPtr& operator=(U*);
+
+    void adopt(T);
+    
+    void swap(JSRetainPtr&);
+
+private:
+    T m_ptr;
+};
+
+template <typename T> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(const JSRetainPtr<T>& o)
+{
+    T optr = o.get();
+    if (optr)
+        JSRetain(optr);
+    T ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        JSRelease(ptr);
+    return *this;
+}
+
+template <typename T> template <typename U> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(const JSRetainPtr<U>& o)
+{
+    T optr = o.get();
+    if (optr)
+        JSRetain(optr);
+    T ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        JSRelease(ptr);
+    return *this;
+}
+
+template <typename T> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(T optr)
+{
+    if (optr)
+        JSRetain(optr);
+    T ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        JSRelease(ptr);
+    return *this;
+}
+
+template <typename T> inline void JSRetainPtr<T>::adopt(T optr)
+{
+    T ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        JSRelease(ptr);
+}
+
+template <typename T> template <typename U> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(U* optr)
+{
+    if (optr)
+        JSRetain(optr);
+    T ptr = m_ptr;
+    m_ptr = optr;
+    if (ptr)
+        JSRelease(ptr);
+    return *this;
+}
+
+template <class T> inline void JSRetainPtr<T>::swap(JSRetainPtr<T>& o)
+{
+    std::swap(m_ptr, o.m_ptr);
+}
+
+template <class T> inline void swap(JSRetainPtr<T>& a, JSRetainPtr<T>& b)
+{
+    a.swap(b);
+}
+
+template <typename T, typename U> inline bool operator==(const JSRetainPtr<T>& a, const JSRetainPtr<U>& b)
+{ 
+    return a.get() == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator==(const JSRetainPtr<T>& a, U* b)
+{ 
+    return a.get() == b; 
+}
+
+template <typename T, typename U> inline bool operator==(T* a, const JSRetainPtr<U>& b) 
+{
+    return a == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const JSRetainPtr<T>& a, const JSRetainPtr<U>& b)
+{ 
+    return a.get() != b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const JSRetainPtr<T>& a, U* b)
+{
+    return a.get() != b; 
+}
+
+template <typename T, typename U> inline bool operator!=(T* a, const JSRetainPtr<U>& b)
+{ 
+    return a != b.get(); 
+}
+
+
+#endif // JSRetainPtr_h