mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-08-17 09:20:28 +03:00
While swap() is available in the global namespace in normal conditions, !USING_AK_GLOBALLY will make this name unavailable in the global namespace, making these calls fail to compile.
209 lines
4.3 KiB
C++
209 lines
4.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Error.h>
|
|
#include <AK/Forward.h>
|
|
#include <AK/NonnullOwnPtr.h>
|
|
#include <AK/RefCounted.h>
|
|
|
|
#define OWNPTR_SCRUB_BYTE 0xf0
|
|
|
|
namespace AK {
|
|
|
|
template<typename T, typename TDeleter>
|
|
class [[nodiscard]] OwnPtr {
|
|
public:
|
|
OwnPtr() = default;
|
|
|
|
OwnPtr(decltype(nullptr))
|
|
: m_ptr(nullptr)
|
|
{
|
|
}
|
|
|
|
OwnPtr(OwnPtr&& other)
|
|
: m_ptr(other.leak_ptr())
|
|
{
|
|
}
|
|
|
|
template<typename U>
|
|
OwnPtr(NonnullOwnPtr<U>&& other)
|
|
: m_ptr(other.leak_ptr())
|
|
{
|
|
}
|
|
template<typename U>
|
|
OwnPtr(OwnPtr<U>&& other)
|
|
: m_ptr(other.leak_ptr())
|
|
{
|
|
}
|
|
~OwnPtr()
|
|
{
|
|
clear();
|
|
#ifdef SANITIZE_PTRS
|
|
m_ptr = (T*)(explode_byte(OWNPTR_SCRUB_BYTE));
|
|
#endif
|
|
}
|
|
|
|
OwnPtr(OwnPtr const&) = delete;
|
|
template<typename U>
|
|
OwnPtr(OwnPtr<U> const&) = delete;
|
|
OwnPtr& operator=(OwnPtr const&) = delete;
|
|
template<typename U>
|
|
OwnPtr& operator=(OwnPtr<U> const&) = delete;
|
|
|
|
template<typename U>
|
|
OwnPtr(NonnullOwnPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr& operator=(NonnullOwnPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr(RefPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr(NonnullRefPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr(WeakPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr& operator=(RefPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr& operator=(NonnullRefPtr<U> const&) = delete;
|
|
template<typename U>
|
|
OwnPtr& operator=(WeakPtr<U> const&) = delete;
|
|
|
|
OwnPtr& operator=(OwnPtr&& other)
|
|
{
|
|
OwnPtr ptr(move(other));
|
|
swap(ptr);
|
|
return *this;
|
|
}
|
|
|
|
template<typename U>
|
|
OwnPtr& operator=(OwnPtr<U>&& other)
|
|
{
|
|
OwnPtr ptr(move(other));
|
|
swap(ptr);
|
|
return *this;
|
|
}
|
|
|
|
template<typename U>
|
|
OwnPtr& operator=(NonnullOwnPtr<U>&& other)
|
|
{
|
|
OwnPtr ptr(move(other));
|
|
swap(ptr);
|
|
VERIFY(m_ptr);
|
|
return *this;
|
|
}
|
|
|
|
OwnPtr& operator=(T* ptr) = delete;
|
|
|
|
OwnPtr& operator=(nullptr_t)
|
|
{
|
|
clear();
|
|
return *this;
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
auto* ptr = exchange(m_ptr, nullptr);
|
|
TDeleter {}(ptr);
|
|
}
|
|
|
|
bool operator!() const { return !m_ptr; }
|
|
|
|
[[nodiscard]] T* leak_ptr()
|
|
{
|
|
T* leaked_ptr = m_ptr;
|
|
m_ptr = nullptr;
|
|
return leaked_ptr;
|
|
}
|
|
|
|
NonnullOwnPtr<T> release_nonnull()
|
|
{
|
|
VERIFY(m_ptr);
|
|
return NonnullOwnPtr<T>(NonnullOwnPtr<T>::Adopt, *leak_ptr());
|
|
}
|
|
|
|
template<typename U>
|
|
NonnullOwnPtr<U> release_nonnull()
|
|
{
|
|
VERIFY(m_ptr);
|
|
return NonnullOwnPtr<U>(NonnullOwnPtr<U>::Adopt, static_cast<U&>(*leak_ptr()));
|
|
}
|
|
|
|
T* ptr() const { return m_ptr; }
|
|
|
|
T* operator->() const
|
|
{
|
|
VERIFY(m_ptr);
|
|
return m_ptr;
|
|
}
|
|
|
|
T& operator*() const
|
|
{
|
|
VERIFY(m_ptr);
|
|
return *m_ptr;
|
|
}
|
|
|
|
operator T*() const { return m_ptr; }
|
|
|
|
operator bool() { return !!m_ptr; }
|
|
|
|
void swap(OwnPtr& other)
|
|
{
|
|
AK::swap(m_ptr, other.m_ptr);
|
|
}
|
|
|
|
template<typename U>
|
|
void swap(OwnPtr<U>& other)
|
|
{
|
|
AK::swap(m_ptr, other.m_ptr);
|
|
}
|
|
|
|
static OwnPtr lift(T* ptr)
|
|
{
|
|
return OwnPtr { ptr };
|
|
}
|
|
|
|
protected:
|
|
explicit OwnPtr(T* ptr)
|
|
: m_ptr(ptr)
|
|
{
|
|
static_assert(
|
|
requires { requires typename T::AllowOwnPtr()(); } || !requires { requires !typename T::AllowOwnPtr()(); declval<T>().ref(); declval<T>().unref(); }, "Use RefPtr<> for RefCounted types");
|
|
}
|
|
|
|
private:
|
|
T* m_ptr = nullptr;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
inline void swap(OwnPtr<T>& a, OwnPtr<U>& b)
|
|
{
|
|
a.swap(b);
|
|
}
|
|
|
|
template<typename T>
|
|
inline OwnPtr<T> adopt_own_if_nonnull(T* object)
|
|
{
|
|
if (object)
|
|
return OwnPtr<T>::lift(object);
|
|
return {};
|
|
}
|
|
|
|
template<typename T>
|
|
struct Traits<OwnPtr<T>> : public GenericTraits<OwnPtr<T>> {
|
|
using PeekType = T*;
|
|
using ConstPeekType = T const*;
|
|
static unsigned hash(OwnPtr<T> const& p) { return ptr_hash(p.ptr()); }
|
|
static bool equals(OwnPtr<T> const& a, OwnPtr<T> const& b) { return a.ptr() == b.ptr(); }
|
|
};
|
|
|
|
}
|
|
|
|
#if USING_AK_GLOBALLY
|
|
using AK::adopt_own_if_nonnull;
|
|
using AK::OwnPtr;
|
|
#endif
|