#ifndef WTF_PassOwnPtr_h
#define WTF_PassOwnPtr_h
#include "Assertions.h"
#include "NullPtr.h"
#include "OwnPtrCommon.h"
#include "TypeTraits.h"
#if !PLATFORM(CHROMIUM) && !PLATFORM(WIN) && !PLATFORM(MAC) && !PLATFORM(QT)
#define LOOSE_PASS_OWN_PTR
#endif
namespace WTF {
template<typename T> class OwnPtr;
template<typename T> class PassOwnPtr;
template<typename T> PassOwnPtr<T> adoptPtr(T*);
template<typename T> class PassOwnPtr {
public:
typedef typename RemovePointer<T>::Type ValueType;
typedef ValueType* PtrType;
PassOwnPtr() : m_ptr(0) { }
PassOwnPtr(std::nullptr_t) : m_ptr(0) { }
PassOwnPtr(const PassOwnPtr& o) : m_ptr(o.leakPtr()) { }
template<typename U> PassOwnPtr(const PassOwnPtr<U>& o) : m_ptr(o.leakPtr()) { }
~PassOwnPtr() { deleteOwnedPtr(m_ptr); }
PtrType get() const { return m_ptr; }
void clear();
PtrType leakPtr() const WARN_UNUSED_RETURN;
ValueType& operator*() const { ASSERT(m_ptr); return *m_ptr; }
PtrType operator->() const { ASSERT(m_ptr); return m_ptr; }
bool operator!() const { return !m_ptr; }
typedef PtrType PassOwnPtr::*UnspecifiedBoolType;
operator UnspecifiedBoolType() const { return m_ptr ? &PassOwnPtr::m_ptr : 0; }
PassOwnPtr& operator=(const PassOwnPtr<T>&);
#if !defined(LOOSE_PASS_OWN_PTR) || !HAVE(NULLPTR)
PassOwnPtr& operator=(std::nullptr_t) { clear(); return *this; }
#endif
template<typename U> PassOwnPtr& operator=(const PassOwnPtr<U>&);
template<typename U> friend PassOwnPtr<U> adoptPtr(U*);
#ifdef LOOSE_PASS_OWN_PTR
PassOwnPtr(PtrType ptr) : m_ptr(ptr) { }
PassOwnPtr& operator=(PtrType);
#endif
private:
#ifndef LOOSE_PASS_OWN_PTR
explicit PassOwnPtr(PtrType ptr) : m_ptr(ptr) { }
#endif
template<typename U> bool operator==(const PassOwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
template<typename U> bool operator!=(const PassOwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
template<typename U> bool operator==(const OwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
template<typename U> bool operator!=(const OwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
mutable PtrType m_ptr;
};
template<typename T> inline void PassOwnPtr<T>::clear()
{
PtrType ptr = m_ptr;
m_ptr = 0;
deleteOwnedPtr(ptr);
}
template<typename T> inline typename PassOwnPtr<T>::PtrType PassOwnPtr<T>::leakPtr() const
{
PtrType ptr = m_ptr;
m_ptr = 0;
return ptr;
}
#ifdef LOOSE_PASS_OWN_PTR
template<typename T> inline PassOwnPtr<T>& PassOwnPtr<T>::operator=(PtrType optr)
{
PtrType ptr = m_ptr;
m_ptr = optr;
ASSERT(!ptr || m_ptr != ptr);
if (ptr)
deleteOwnedPtr(ptr);
return *this;
}
#endif
template<typename T> inline PassOwnPtr<T>& PassOwnPtr<T>::operator=(const PassOwnPtr<T>& optr)
{
PtrType ptr = m_ptr;
m_ptr = optr.leakPtr();
ASSERT(!ptr || m_ptr != ptr);
if (ptr)
deleteOwnedPtr(ptr);
return *this;
}
template<typename T> template<typename U> inline PassOwnPtr<T>& PassOwnPtr<T>::operator=(const PassOwnPtr<U>& optr)
{
PtrType ptr = m_ptr;
m_ptr = optr.leakPtr();
ASSERT(!ptr || m_ptr != ptr);
if (ptr)
deleteOwnedPtr(ptr);
return *this;
}
template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, const PassOwnPtr<U>& b)
{
return a.get() == b.get();
}
template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, const OwnPtr<U>& b)
{
return a.get() == b.get();
}
template<typename T, typename U> inline bool operator==(const OwnPtr<T>& a, const PassOwnPtr<U>& b)
{
return a.get() == b.get();
}
template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, U* b)
{
return a.get() == b;
}
template<typename T, typename U> inline bool operator==(T* a, const PassOwnPtr<U>& b)
{
return a == b.get();
}
template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, const PassOwnPtr<U>& b)
{
return a.get() != b.get();
}
template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, const OwnPtr<U>& b)
{
return a.get() != b.get();
}
template<typename T, typename U> inline bool operator!=(const OwnPtr<T>& a, const PassOwnPtr<U>& b)
{
return a.get() != b.get();
}
template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, U* b)
{
return a.get() != b;
}
template<typename T, typename U> inline bool operator!=(T* a, const PassOwnPtr<U>& b)
{
return a != b.get();
}
template<typename T> inline PassOwnPtr<T> adoptPtr(T* ptr)
{
return PassOwnPtr<T>(ptr);
}
template<typename T, typename U> inline PassOwnPtr<T> static_pointer_cast(const PassOwnPtr<U>& p)
{
return adoptPtr(static_cast<T*>(p.leakPtr()));
}
template<typename T, typename U> inline PassOwnPtr<T> const_pointer_cast(const PassOwnPtr<U>& p)
{
return adoptPtr(const_cast<T*>(p.leakPtr()));
}
template<typename T> inline T* getPtr(const PassOwnPtr<T>& p)
{
return p.get();
}
}
using WTF::PassOwnPtr;
using WTF::adoptPtr;
using WTF::const_pointer_cast;
using WTF::static_pointer_cast;
#endif // WTF_PassOwnPtr_h