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#pragma once
#include <AK/LogStream.h>
#include <AK/NonnullRefPtr.h>
#include <AK/StdLibExtras.h>
#include <AK/Types.h>
namespace AK {
template<typename T>
class OwnPtr;
template<typename T>
class RefPtr {
public:
enum AdoptTag {
Adopt
};
RefPtr() {}
RefPtr(const T* ptr)
: m_ptr(const_cast<T*>(ptr))
{
ref_if_not_null(m_ptr);
}
RefPtr(const T& object)
: m_ptr(const_cast<T*>(&object))
{
m_ptr->ref();
}
RefPtr(AdoptTag, T& object)
: m_ptr(&object)
{
}
RefPtr(RefPtr&& other)
: m_ptr(other.leak_ref())
{
}
RefPtr(const NonnullRefPtr<T>& other)
: m_ptr(const_cast<T*>(other.ptr()))
{
ASSERT(m_ptr);
m_ptr->ref();
}
template<typename U>
RefPtr(const NonnullRefPtr<U>& other)
: m_ptr(static_cast<T*>(const_cast<U*>(other.ptr())))
{
ASSERT(m_ptr);
m_ptr->ref();
}
template<typename U>
RefPtr(NonnullRefPtr<U>&& other)
: m_ptr(static_cast<T*>(&other.leak_ref()))
{
ASSERT(m_ptr);
}
template<typename U>
RefPtr(RefPtr<U>&& other)
: m_ptr(static_cast<T*>(other.leak_ref()))
{
}
RefPtr(const RefPtr& other)
: m_ptr(const_cast<T*>(other.ptr()))
{
ref_if_not_null(m_ptr);
}
template<typename U>
RefPtr(const RefPtr<U>& other)
: m_ptr(static_cast<T*>(const_cast<U*>(other.ptr())))
{
ref_if_not_null(m_ptr);
}
~RefPtr()
{
clear();
#ifdef SANITIZE_PTRS
if constexpr (sizeof(T*) == 8)
m_ptr = (T*)(0xe0e0e0e0e0e0e0e0);
else
m_ptr = (T*)(0xe0e0e0e0);
#endif
}
RefPtr(std::nullptr_t) {}
template<typename U>
RefPtr(const OwnPtr<U>&) = delete;
template<typename U>
RefPtr& operator=(const OwnPtr<U>&) = delete;
template<typename U>
void swap(RefPtr<U>& other)
{
::swap(m_ptr, other.m_ptr);
}
RefPtr& operator=(RefPtr&& other)
{
RefPtr tmp = move(other);
swap(tmp);
return *this;
}
template<typename U>
RefPtr& operator=(RefPtr<U>&& other)
{
RefPtr tmp = move(other);
swap(tmp);
return *this;
}
template<typename U>
RefPtr& operator=(NonnullRefPtr<U>&& other)
{
RefPtr tmp = move(other);
swap(tmp);
ASSERT(m_ptr);
return *this;
}
RefPtr& operator=(const NonnullRefPtr<T>& other)
{
RefPtr tmp = other;
swap(tmp);
ASSERT(m_ptr);
return *this;
}
template<typename U>
RefPtr& operator=(const NonnullRefPtr<U>& other)
{
RefPtr tmp = other;
swap(tmp);
ASSERT(m_ptr);
return *this;
}
RefPtr& operator=(const RefPtr& other)
{
RefPtr tmp = other;
swap(tmp);
return *this;
}
template<typename U>
RefPtr& operator=(const RefPtr<U>& other)
{
RefPtr tmp = other;
swap(tmp);
return *this;
}
RefPtr& operator=(const T* ptr)
{
RefPtr tmp = ptr;
swap(tmp);
return *this;
}
RefPtr& operator=(const T& object)
{
RefPtr tmp = object;
swap(tmp);
return *this;
}
RefPtr& operator=(std::nullptr_t)
{
clear();
return *this;
}
void clear()
{
deref_if_not_null(m_ptr);
m_ptr = nullptr;
}
bool operator!() const { return !m_ptr; }
[[nodiscard]] T* leak_ref()
{
return exchange(m_ptr, nullptr);
}
NonnullRefPtr<T> release_nonnull()
{
ASSERT(m_ptr);
return NonnullRefPtr<T>(NonnullRefPtr<T>::Adopt, *leak_ref());
}
T* ptr() { return m_ptr; }
const T* ptr() const { return m_ptr; }
T* operator->()
{
ASSERT(m_ptr);
return m_ptr;
}
const T* operator->() const
{
ASSERT(m_ptr);
return m_ptr;
}
T& operator*()
{
ASSERT(m_ptr);
return *m_ptr;
}
const T& operator*() const
{
ASSERT(m_ptr);
return *m_ptr;
}
operator const T*() const { return m_ptr; }
operator T*() { return m_ptr; }
operator bool() { return !!m_ptr; }
bool operator==(std::nullptr_t) const { return !m_ptr; }
bool operator!=(std::nullptr_t) const { return m_ptr; }
bool operator==(const RefPtr& other) const { return m_ptr == other.m_ptr; }
bool operator!=(const RefPtr& other) const { return m_ptr != other.m_ptr; }
bool operator==(RefPtr& other) { return m_ptr == other.m_ptr; }
bool operator!=(RefPtr& other) { return m_ptr != other.m_ptr; }
bool operator==(const T* other) const { return m_ptr == other; }
bool operator!=(const T* other) const { return m_ptr != other; }
bool operator==(T* other) { return m_ptr == other; }
bool operator!=(T* other) { return m_ptr != other; }
bool is_null() const { return !m_ptr; }
private:
T* m_ptr = nullptr;
};
template<typename T>
inline const LogStream& operator<<(const LogStream& stream, const RefPtr<T>& value)
{
return stream << value.ptr();
}
}
using AK::RefPtr;
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