/*
- * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*
*/
+// RefPtr and PassRefPtr are documented at http://webkit.org/coding/RefPtr.html
+
#ifndef WTF_RefPtr_h
#define WTF_RefPtr_h
#include <algorithm>
-#include "AlwaysInline.h"
#include "FastAllocBase.h"
+#include "PassRefPtr.h"
namespace WTF {
enum PlacementNewAdoptType { PlacementNewAdopt };
- template <typename T> class PassRefPtr;
+ template<typename T> class PassRefPtr;
+ template<typename T> class NonNullPassRefPtr;
enum HashTableDeletedValueType { HashTableDeletedValue };
- template <typename T> class RefPtr : public FastAllocBase {
+ template<typename T> class RefPtr {
+ WTF_MAKE_FAST_ALLOCATED;
public:
- RefPtr() : m_ptr(0) { }
- RefPtr(T* ptr) : m_ptr(ptr) { if (ptr) ptr->ref(); }
- RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { if (T* ptr = m_ptr) ptr->ref(); }
- // see comment in PassRefPtr.h for why this takes const reference
- template <typename U> RefPtr(const PassRefPtr<U>&);
+ ALWAYS_INLINE RefPtr() : m_ptr(0) { }
+ ALWAYS_INLINE RefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
+ ALWAYS_INLINE RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { refIfNotNull(m_ptr); }
+ template<typename U> RefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { refIfNotNull(m_ptr); }
+
+ // See comments in PassRefPtr.h for an explanation of why these takes const references.
+ template<typename U> RefPtr(const PassRefPtr<U>&);
+ template<typename U> RefPtr(const NonNullPassRefPtr<U>&);
// Special constructor for cases where we overwrite an object in place.
- RefPtr(PlacementNewAdoptType) { }
+ ALWAYS_INLINE RefPtr(PlacementNewAdoptType) { }
// Hash table deleted values, which are only constructed and never copied or destroyed.
RefPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
- ~RefPtr() { if (T* ptr = m_ptr) ptr->deref(); }
-
- template <typename U> RefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { if (T* ptr = m_ptr) ptr->ref(); }
-
+ ALWAYS_INLINE ~RefPtr() { derefIfNotNull(m_ptr); }
+
T* get() const { return m_ptr; }
- void clear() { if (T* ptr = m_ptr) ptr->deref(); m_ptr = 0; }
+ void clear();
PassRefPtr<T> release() { PassRefPtr<T> tmp = adoptRef(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.
-#if COMPILER(WINSCW)
- operator bool() const { return m_ptr; }
-#else
- typedef T* RefPtr::*UnspecifiedBoolType;
+ typedef T* (RefPtr::*UnspecifiedBoolType);
operator UnspecifiedBoolType() const { return m_ptr ? &RefPtr::m_ptr : 0; }
-#endif
RefPtr& operator=(const RefPtr&);
RefPtr& operator=(T*);
RefPtr& operator=(const PassRefPtr<T>&);
- template <typename U> RefPtr& operator=(const RefPtr<U>&);
- template <typename U> RefPtr& operator=(const PassRefPtr<U>&);
+ RefPtr& operator=(const NonNullPassRefPtr<T>&);
+#if !HAVE(NULLPTR)
+ RefPtr& operator=(std::nullptr_t) { clear(); return *this; }
+#endif
+ template<typename U> RefPtr& operator=(const RefPtr<U>&);
+ template<typename U> RefPtr& operator=(const PassRefPtr<U>&);
+ template<typename U> RefPtr& operator=(const NonNullPassRefPtr<U>&);
void swap(RefPtr&);
- private:
static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
+ private:
T* m_ptr;
};
- template <typename T> template <typename U> inline RefPtr<T>::RefPtr(const PassRefPtr<U>& o)
- : m_ptr(o.releaseRef())
+ template<typename T> template<typename U> inline RefPtr<T>::RefPtr(const PassRefPtr<U>& o)
+ : m_ptr(o.leakRef())
+ {
+ }
+
+ template<typename T> template<typename U> inline RefPtr<T>::RefPtr(const NonNullPassRefPtr<U>& o)
+ : m_ptr(o.leakRef())
+ {
+ }
+
+ template<typename T> inline void RefPtr<T>::clear()
{
+ T* ptr = m_ptr;
+ m_ptr = 0;
+ derefIfNotNull(ptr);
}
- template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<T>& o)
+ template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<T>& o)
{
T* optr = o.get();
- if (optr)
- optr->ref();
+ refIfNotNull(optr);
T* ptr = m_ptr;
m_ptr = optr;
- if (ptr)
- ptr->deref();
+ derefIfNotNull(ptr);
return *this;
}
- template <typename T> template <typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<U>& o)
+ template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<U>& o)
{
T* optr = o.get();
- if (optr)
- optr->ref();
+ refIfNotNull(optr);
T* ptr = m_ptr;
m_ptr = optr;
- if (ptr)
- ptr->deref();
+ derefIfNotNull(ptr);
return *this;
}
- template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(T* optr)
+ template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(T* optr)
{
- if (optr)
- optr->ref();
+ refIfNotNull(optr);
T* ptr = m_ptr;
m_ptr = optr;
- if (ptr)
- ptr->deref();
+ derefIfNotNull(ptr);
+ return *this;
+ }
+
+ template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<T>& o)
+ {
+ T* ptr = m_ptr;
+ m_ptr = o.leakRef();
+ derefIfNotNull(ptr);
+ return *this;
+ }
+
+ template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const NonNullPassRefPtr<T>& o)
+ {
+ T* ptr = m_ptr;
+ m_ptr = o.leakRef();
+ derefIfNotNull(ptr);
return *this;
}
- template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<T>& o)
+ template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<U>& o)
{
T* ptr = m_ptr;
- m_ptr = o.releaseRef();
- if (ptr)
- ptr->deref();
+ m_ptr = o.leakRef();
+ derefIfNotNull(ptr);
return *this;
}
- template <typename T> template <typename U> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<U>& o)
+ template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const NonNullPassRefPtr<U>& o)
{
T* ptr = m_ptr;
- m_ptr = o.releaseRef();
- if (ptr)
- ptr->deref();
+ m_ptr = o.leakRef();
+ derefIfNotNull(ptr);
return *this;
}
- template <class T> inline void RefPtr<T>::swap(RefPtr<T>& o)
+ template<class T> inline void RefPtr<T>::swap(RefPtr<T>& o)
{
std::swap(m_ptr, o.m_ptr);
}
- template <class T> inline void swap(RefPtr<T>& a, RefPtr<T>& b)
+ template<class T> inline void swap(RefPtr<T>& a, RefPtr<T>& b)
{
a.swap(b);
}
- template <typename T, typename U> inline bool operator==(const RefPtr<T>& a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(const RefPtr<T>& a, const RefPtr<U>& b)
{
return a.get() == b.get();
}
- template <typename T, typename U> inline bool operator==(const RefPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator==(const RefPtr<T>& a, U* b)
{
return a.get() == b;
}
- template <typename T, typename U> inline bool operator==(T* a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(T* a, const RefPtr<U>& b)
{
return a == b.get();
}
- template <typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const RefPtr<U>& b)
{
return a.get() != b.get();
}
- template <typename T, typename U> inline bool operator!=(const RefPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator!=(const RefPtr<T>& a, U* b)
{
return a.get() != b;
}
- template <typename T, typename U> inline bool operator!=(T* a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(T* a, const RefPtr<U>& b)
{
return a != b.get();
}
- template <typename T, typename U> inline RefPtr<T> static_pointer_cast(const RefPtr<U>& p)
+ template<typename T, typename U> inline RefPtr<T> static_pointer_cast(const RefPtr<U>& p)
{
return RefPtr<T>(static_cast<T*>(p.get()));
}
- template <typename T, typename U> inline RefPtr<T> const_pointer_cast(const RefPtr<U>& p)
+ template<typename T, typename U> inline RefPtr<T> const_pointer_cast(const RefPtr<U>& p)
{
return RefPtr<T>(const_cast<T*>(p.get()));
}
- template <typename T> inline T* getPtr(const RefPtr<T>& p)
+ template<typename T> inline T* getPtr(const RefPtr<T>& p)
{
return p.get();
}
projects / apple / javascriptcore.git / blobdiff