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#pragma once
#include <AK/Assertions.h>
#include <AK/LogStream.h>
#include <AK/StdLibExtras.h>
#include <AK/Traits.h>
#include <AK/Types.h>
namespace AK {
template<typename T>
class RefPtr;
template<typename T>
class NonnullRefPtr;
template<typename T>
class WeakPtr;
template<typename T>
class CONSUMABLE(unconsumed) NonnullOwnPtr {
public:
typedef T ElementType;
enum AdoptTag { Adopt };
RETURN_TYPESTATE(unconsumed)
NonnullOwnPtr(AdoptTag, T& ptr)
: m_ptr(&ptr)
{
}
RETURN_TYPESTATE(unconsumed)
NonnullOwnPtr(NonnullOwnPtr&& other)
: m_ptr(other.leak_ptr())
{
ASSERT(m_ptr);
}
template<typename U>
RETURN_TYPESTATE(unconsumed)
NonnullOwnPtr(NonnullOwnPtr<U>&& other)
: m_ptr(static_cast<T*>(other.leak_ptr()))
{
ASSERT(m_ptr);
}
~NonnullOwnPtr()
{
clear();
#ifdef SANITIZE_PTRS
if constexpr (sizeof(T*) == 8)
m_ptr = (T*)(0xe3e3e3e3e3e3e3e3);
else
m_ptr = (T*)(0xe3e3e3e3);
#endif
}
NonnullOwnPtr(const NonnullOwnPtr&) = delete;
template<typename U>
NonnullOwnPtr(const NonnullOwnPtr<U>&) = delete;
NonnullOwnPtr& operator=(const NonnullOwnPtr&) = delete;
template<typename U>
NonnullOwnPtr& operator=(const NonnullOwnPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr(const RefPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr(const NonnullRefPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr(const WeakPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr& operator=(const RefPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr& operator=(const NonnullRefPtr<U>&) = delete;
template<typename U>
NonnullOwnPtr& operator=(const WeakPtr<U>&) = delete;
RETURN_TYPESTATE(unconsumed)
NonnullOwnPtr& operator=(NonnullOwnPtr&& other)
{
if (this != &other) {
delete m_ptr;
m_ptr = other.leak_ptr();
ASSERT(m_ptr);
}
return *this;
}
template<typename U>
RETURN_TYPESTATE(unconsumed)
NonnullOwnPtr& operator=(NonnullOwnPtr<U>&& other)
{
if (this != static_cast<void*>(&other)) {
delete m_ptr;
m_ptr = other.leak_ptr();
ASSERT(m_ptr);
}
return *this;
}
CALLABLE_WHEN(unconsumed)
SET_TYPESTATE(consumed)
T* leak_ptr()
{
return exchange(m_ptr, nullptr);
}
CALLABLE_WHEN(unconsumed)
T* ptr() { return m_ptr; }
CALLABLE_WHEN(unconsumed)
const T* ptr() const { return m_ptr; }
CALLABLE_WHEN(unconsumed)
T* operator->() { return m_ptr; }
CALLABLE_WHEN(unconsumed)
const T* operator->() const { return m_ptr; }
CALLABLE_WHEN(unconsumed)
T& operator*() { return *m_ptr; }
CALLABLE_WHEN(unconsumed)
const T& operator*() const { return *m_ptr; }
CALLABLE_WHEN(unconsumed)
operator const T*() const { return m_ptr; }
CALLABLE_WHEN(unconsumed)
operator T*() { return m_ptr; }
operator bool() const = delete;
bool operator!() const = delete;
private:
void clear()
{
if (!m_ptr)
return;
delete m_ptr;
m_ptr = nullptr;
}
T* m_ptr = nullptr;
};
template<class T, class... Args>
inline NonnullOwnPtr<T>
make(Args&&... args)
{
return NonnullOwnPtr<T>(NonnullOwnPtr<T>::Adopt, *new T(forward<Args>(args)...));
}
template<typename T>
struct Traits<NonnullOwnPtr<T>> : public GenericTraits<NonnullOwnPtr<T>> {
using PeekType = const T*;
static unsigned hash(const NonnullOwnPtr<T>& p) { return int_hash((u32)p.ptr()); }
static void dump(const NonnullOwnPtr<T>& p) { kprintf("%p", p.ptr()); }
static bool equals(const NonnullOwnPtr<T>& a, const NonnullOwnPtr<T>& b) { return a.ptr() == b.ptr(); }
};
template<typename T>
inline const LogStream& operator<<(const LogStream& stream, const NonnullOwnPtr<T>& value)
{
return stream << value.ptr();
}
}
using AK::make;
using AK::NonnullOwnPtr;
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