#ifndef WTF_RefPtr_h
#define WTF_RefPtr_h
#include <algorithm>
#include "wtf/HashTableDeletedValueType.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RawPtr.h"
namespace WTF {
template<typename T> class PassRefPtr;
template<typename T> class RefPtr {
WTF_DISALLOW_CONSTRUCTION_FROM_ZERO(RefPtr);
WTF_DISALLOW_ZERO_ASSIGNMENT(RefPtr);
public:
ALWAYS_INLINE RefPtr() : m_ptr(0) { }
ALWAYS_INLINE RefPtr(std::nullptr_t) : m_ptr(0) { }
ALWAYS_INLINE RefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
template<typename U> RefPtr(const RawPtr<U>& ptr, EnsurePtrConvertibleArgDecl(U, T)) : m_ptr(ptr.get()) { refIfNotNull(m_ptr); }
ALWAYS_INLINE explicit RefPtr(T& ref) : m_ptr(&ref) { m_ptr->ref(); }
ALWAYS_INLINE RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { refIfNotNull(m_ptr); }
template<typename U> RefPtr(const RefPtr<U>& o, EnsurePtrConvertibleArgDecl(U, T)) : m_ptr(o.get()) { refIfNotNull(m_ptr); }
template<typename U> RefPtr(const PassRefPtr<U>&, EnsurePtrConvertibleArgDecl(U, T));
RefPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
ALWAYS_INLINE ~RefPtr() { derefIfNotNull(m_ptr); }
ALWAYS_INLINE T* get() const { return m_ptr; }
void clear();
PassRefPtr<T> release() { PassRefPtr<T> tmp = adoptRef(m_ptr); m_ptr = 0; return tmp; }
T& operator*() const { return *m_ptr; }
ALWAYS_INLINE T* operator->() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
typedef T* (RefPtr::*UnspecifiedBoolType);
operator UnspecifiedBoolType() const { return m_ptr ? &RefPtr::m_ptr : 0; }
RefPtr& operator=(const RefPtr&);
RefPtr& operator=(T*);
RefPtr& operator=(const PassRefPtr<T>&);
RefPtr& operator=(std::nullptr_t) { clear(); return *this; }
template<typename U> RefPtr<T>& operator=(const RefPtr<U>&);
template<typename U> RefPtr<T>& operator=(const PassRefPtr<U>&);
template<typename U> RefPtr<T>& operator=(const RawPtr<U>&);
void swap(RefPtr&);
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, EnsurePtrConvertibleArgDefn(U, T))
: 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& o)
{
RefPtr ptr = o;
swap(ptr);
return *this;
}
template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<U>& o)
{
RefPtr ptr = o;
swap(ptr);
return *this;
}
template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(T* optr)
{
RefPtr ptr = optr;
swap(ptr);
return *this;
}
template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<T>& o)
{
RefPtr ptr = o;
swap(ptr);
return *this;
}
template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<U>& o)
{
RefPtr ptr = o;
swap(ptr);
return *this;
}
template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RawPtr<U>& o)
{
RefPtr ptr = o.get();
swap(ptr);
return *this;
}
template<class T> inline void RefPtr<T>::swap(RefPtr& o)
{
std::swap(m_ptr, o.m_ptr);
}
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)
{
return a.get() == b.get();
}
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)
{
return a == b.get();
}
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)
{
return a.get() != 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)
{
return RefPtr<T>(static_cast<T*>(p.get()));
}
template<typename T> inline T* getPtr(const RefPtr<T>& p)
{
return p.get();
}
template<typename T> class RefPtrValuePeeker {
public:
ALWAYS_INLINE RefPtrValuePeeker(T* p): m_ptr(p) { }
ALWAYS_INLINE RefPtrValuePeeker(std::nullptr_t): m_ptr(0) { }
template<typename U> RefPtrValuePeeker(const RefPtr<U>& p): m_ptr(p.get()) { }
template<typename U> RefPtrValuePeeker(const PassRefPtr<U>& p): m_ptr(p.get()) { }
ALWAYS_INLINE operator T*() const { return m_ptr; }
private:
T* m_ptr;
};
}
using WTF::RefPtr;
using WTF::static_pointer_cast;
#endif