Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 219 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wtf/PassOwnArrayPtr.h b/Source/JavaScriptCore/wtf/PassOwnArrayPtr.h
new file mode 100644
index 0000000..499e850
--- /dev/null
+++ b/Source/JavaScriptCore/wtf/PassOwnArrayPtr.h
@@ -0,0 +1,219 @@
+/*
+ * 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. ``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
+ * 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 WTF_PassOwnArrayPtr_h
+#define WTF_PassOwnArrayPtr_h
+
+#include "Assertions.h"
+#include "NullPtr.h"
+#include "OwnArrayPtrCommon.h"
+#include "TypeTraits.h"
+
+// Remove this once we make all WebKit code compatible with stricter rules about PassOwnArrayPtr.
+#define LOOSE_PASS_OWN_ARRAY_PTR
+
+namespace WTF {
+
+template<typename T> class OwnArrayPtr;
+template<typename T> class PassOwnArrayPtr;
+template<typename T> PassOwnArrayPtr<T> adoptArrayPtr(T*);
+
+template<typename T> class PassOwnArrayPtr {
+public:
+    typedef T* PtrType;
+
+    PassOwnArrayPtr() : m_ptr(0) { }
+
+    // It somewhat breaks the type system to allow transfer of ownership out of
+    // a const PassOwnArrayPtr. However, it makes it much easier to work with PassOwnArrayPtr
+    // temporaries, and we don't have a need to use real const PassOwnArrayPtrs anyway.
+    PassOwnArrayPtr(const PassOwnArrayPtr& o) : m_ptr(o.leakPtr()) { }
+    template<typename U> PassOwnArrayPtr(const PassOwnArrayPtr<U>& o) : m_ptr(o.leakPtr()) { }
+
+    ~PassOwnArrayPtr() { deleteOwnedArrayPtr(m_ptr); }
+
+    PtrType get() const { return m_ptr; }
+
+    void clear();
+    PtrType leakPtr() const WARN_UNUSED_RETURN;
+
+    T& operator*() const { ASSERT(m_ptr); return *m_ptr; }
+    PtrType operator->() const { ASSERT(m_ptr); return m_ptr; }
+
+    bool operator!() const { return !m_ptr; }
+
+    // This conversion operator allows implicit conversion to bool but not to other integer types.
+#if COMPILER(WINSCW)
+    operator bool() const { return m_ptr; }
+#else
+    typedef PtrType PassOwnArrayPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return m_ptr ? &PassOwnArrayPtr::m_ptr : 0; }
+#endif
+
+    PassOwnArrayPtr& operator=(const PassOwnArrayPtr<T>&);
+#if !defined(LOOSE_PASS_OWN_ARRAY_PTR) || !HAVE(NULLPTR)
+    PassOwnArrayPtr& operator=(std::nullptr_t) { clear(); return *this; }
+#endif
+    template<typename U> PassOwnArrayPtr& operator=(const PassOwnArrayPtr<U>&);
+
+    template<typename U> friend PassOwnArrayPtr<U> adoptArrayPtr(U*);
+
+#ifdef LOOSE_PASS_OWN_ARRAY_PTR
+    PassOwnArrayPtr(PtrType ptr) : m_ptr(ptr) { }
+    PassOwnArrayPtr& operator=(PtrType);
+#endif
+
+private:
+#ifndef LOOSE_PASS_OWN_ARRAY_PTR
+    explicit PassOwnArrayPtr(PtrType ptr) : m_ptr(ptr) { }
+#endif
+
+    mutable PtrType m_ptr;
+};
+
+template<typename T> inline void PassOwnArrayPtr<T>::clear()
+{
+    PtrType ptr = m_ptr;
+    m_ptr = 0;
+    deleteOwnedArrayPtr(ptr);
+}
+
+template<typename T> inline typename PassOwnArrayPtr<T>::PtrType PassOwnArrayPtr<T>::leakPtr() const
+{
+    PtrType ptr = m_ptr;
+    m_ptr = 0;
+    return ptr;
+}
+
+#ifdef LOOSE_PASS_OWN_ARRAY_PTR
+template<typename T> inline PassOwnArrayPtr<T>& PassOwnArrayPtr<T>::operator=(PtrType optr)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = optr;
+    ASSERT(!ptr || m_ptr != ptr);
+    if (ptr)
+        deleteOwnedArrayPtr(ptr);
+    return *this;
+}
+#endif
+
+template<typename T> inline PassOwnArrayPtr<T>& PassOwnArrayPtr<T>::operator=(const PassOwnArrayPtr<T>& optr)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = optr.leakPtr();
+    ASSERT(!ptr || m_ptr != ptr);
+    if (ptr)
+        deleteOwnedArrayPtr(ptr);
+    return *this;
+}
+
+template<typename T> template<typename U> inline PassOwnArrayPtr<T>& PassOwnArrayPtr<T>::operator=(const PassOwnArrayPtr<U>& optr)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = optr.leakPtr();
+    ASSERT(!ptr || m_ptr != ptr);
+    if (ptr)
+        deleteOwnedArrayPtr(ptr);
+    return *this;
+}
+
+template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
+{
+    return a.get() == b.get(); 
+}
+
+template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, const OwnArrayPtr<U>& b) 
+{
+    return a.get() == b.get(); 
+}
+
+template<typename T, typename U> inline bool operator==(const OwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
+{
+    return a.get() == b.get(); 
+}
+
+template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, U* b) 
+{
+    return a.get() == b; 
+}
+
+template<typename T, typename U> inline bool operator==(T* a, const PassOwnArrayPtr<U>& b) 
+{
+    return a == b.get(); 
+}
+
+template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
+{
+    return a.get() != b.get(); 
+}
+
+template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, const OwnArrayPtr<U>& b) 
+{
+    return a.get() != b.get(); 
+}
+
+template<typename T, typename U> inline bool operator!=(const OwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
+{
+    return a.get() != b.get(); 
+}
+
+template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, U* b)
+{
+    return a.get() != b; 
+}
+
+template<typename T, typename U> inline bool operator!=(T* a, const PassOwnArrayPtr<U>& b) 
+{
+    return a != b.get(); 
+}
+
+template<typename T> inline PassOwnArrayPtr<T> adoptArrayPtr(T* ptr)
+{
+    return PassOwnArrayPtr<T>(ptr);
+}
+
+template<typename T, typename U> inline PassOwnArrayPtr<T> static_pointer_cast(const PassOwnArrayPtr<U>& p) 
+{
+    return adoptArrayPtr(static_cast<T*>(p.leakPtr()));
+}
+
+template<typename T, typename U> inline PassOwnArrayPtr<T> const_pointer_cast(const PassOwnArrayPtr<U>& p) 
+{
+    return adoptArrayPtr(const_cast<T*>(p.leakPtr()));
+}
+
+template<typename T> inline T* getPtr(const PassOwnArrayPtr<T>& p)
+{
+    return p.get();
+}
+
+} // namespace WTF
+
+using WTF::PassOwnArrayPtr;
+using WTF::adoptArrayPtr;
+using WTF::const_pointer_cast;
+using WTF::static_pointer_cast;
+
+#endif // WTF_PassOwnArrayPtr_h