#ifndef WTF_OwnPtr_h
#define WTF_OwnPtr_h
#include <wtf/Assertions.h>
#include <wtf/Noncopyable.h>
#include <wtf/OwnPtrCommon.h>
#include <algorithm>
#include <cstddef>
#include <memory>
namespace WTF {
template<typename T> class PassOwnPtr;
template<typename T> PassOwnPtr<T> adoptPtr(T*);
template<typename T> class OwnPtr {
public:
typedef T ValueType;
typedef ValueType* PtrType;
OwnPtr() : m_ptr(0) { }
OwnPtr(std::nullptr_t) : m_ptr(0) { }
template<typename U> OwnPtr(const PassOwnPtr<U>& o);
~OwnPtr() { deleteOwnedPtr(m_ptr); }
PtrType get() const { return m_ptr; }
void clear();
PassOwnPtr<T> release();
PtrType leakPtr() 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 OwnPtr::*UnspecifiedBoolType;
operator UnspecifiedBoolType() const { return m_ptr ? &OwnPtr::m_ptr : 0; }
OwnPtr& operator=(const PassOwnPtr<T>&);
OwnPtr& operator=(std::nullptr_t) { clear(); return *this; }
template<typename U> OwnPtr& operator=(const PassOwnPtr<U>&);
OwnPtr(OwnPtr&&);
template<typename U> OwnPtr(OwnPtr<U>&&);
OwnPtr& operator=(OwnPtr&&);
template<typename U> OwnPtr& operator=(OwnPtr<U>&&);
void swap(OwnPtr& o) { std::swap(m_ptr, o.m_ptr); }
private:
explicit OwnPtr(PtrType ptr) : m_ptr(ptr) { }
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; }
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; }
PtrType m_ptr;
};
template<typename T> template<typename U> inline OwnPtr<T>::OwnPtr(const PassOwnPtr<U>& o)
: m_ptr(o.leakPtr())
{
}
template<typename T> inline void OwnPtr<T>::clear()
{
PtrType ptr = m_ptr;
m_ptr = 0;
deleteOwnedPtr(ptr);
}
template<typename T> inline PassOwnPtr<T> OwnPtr<T>::release()
{
PtrType ptr = m_ptr;
m_ptr = 0;
return adoptPtr(ptr);
}
template<typename T> inline typename OwnPtr<T>::PtrType OwnPtr<T>::leakPtr()
{
PtrType ptr = m_ptr;
m_ptr = 0;
return ptr;
}
template<typename T> inline OwnPtr<T>& OwnPtr<T>::operator=(const PassOwnPtr<T>& o)
{
PtrType ptr = m_ptr;
m_ptr = o.leakPtr();
ASSERT(!ptr || m_ptr != ptr);
deleteOwnedPtr(ptr);
return *this;
}
template<typename T> template<typename U> inline OwnPtr<T>& OwnPtr<T>::operator=(const PassOwnPtr<U>& o)
{
PtrType ptr = m_ptr;
m_ptr = o.leakPtr();
ASSERT(!ptr || m_ptr != ptr);
deleteOwnedPtr(ptr);
return *this;
}
template<typename T> inline OwnPtr<T>::OwnPtr(OwnPtr<T>&& o)
: m_ptr(o.leakPtr())
{
}
template<typename T> template<typename U> inline OwnPtr<T>::OwnPtr(OwnPtr<U>&& o)
: m_ptr(o.leakPtr())
{
}
template<typename T> inline auto OwnPtr<T>::operator=(OwnPtr&& o) -> OwnPtr&
{
ASSERT(!o || o != m_ptr);
OwnPtr ptr = WTF::move(o);
swap(ptr);
return *this;
}
template<typename T> template<typename U> inline auto OwnPtr<T>::operator=(OwnPtr<U>&& o) -> OwnPtr&
{
ASSERT(!o || o != m_ptr);
OwnPtr ptr = WTF::move(o);
swap(ptr);
return *this;
}
template<typename T> inline void swap(OwnPtr<T>& a, OwnPtr<T>& b)
{
a.swap(b);
}
template<typename T, typename U> inline bool operator==(const OwnPtr<T>& a, U* b)
{
return a.get() == b;
}
template<typename T, typename U> inline bool operator==(T* a, const OwnPtr<U>& b)
{
return a == b.get();
}
template<typename T, typename U> inline bool operator!=(const OwnPtr<T>& a, U* b)
{
return a.get() != b;
}
template<typename T, typename U> inline bool operator!=(T* a, const OwnPtr<U>& b)
{
return a != b.get();
}
template<typename T> inline typename OwnPtr<T>::PtrType getPtr(const OwnPtr<T>& p)
{
return p.get();
}
}
using WTF::OwnPtr;
#endif // WTF_OwnPtr_h