2020-01-18 11:38:21 +03:00
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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2019-07-24 09:25:27 +03:00
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#pragma once
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#include <AK/Assertions.h>
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#include <AK/LogStream.h>
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2020-06-12 16:30:30 +03:00
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#include <AK/RefCounted.h>
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2019-07-24 09:25:27 +03:00
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#include <AK/StdLibExtras.h>
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#include <AK/Traits.h>
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#include <AK/Types.h>
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namespace AK {
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template<typename T>
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class RefPtr;
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template<typename T>
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class NonnullRefPtr;
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template<typename T>
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class WeakPtr;
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template<typename T>
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2020-05-16 11:51:21 +03:00
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class NonnullOwnPtr {
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2019-07-24 09:25:27 +03:00
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public:
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2019-07-25 12:10:28 +03:00
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typedef T ElementType;
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2019-07-24 09:25:27 +03:00
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enum AdoptTag { Adopt };
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NonnullOwnPtr(AdoptTag, T& ptr)
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: m_ptr(&ptr)
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{
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2020-06-12 16:30:30 +03:00
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static_assert(!is_ref_counted((const T*)nullptr), "Use RefPtr<> for RefCounted types");
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2019-07-24 09:25:27 +03:00
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}
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NonnullOwnPtr(NonnullOwnPtr&& other)
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: m_ptr(other.leak_ptr())
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{
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ASSERT(m_ptr);
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}
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template<typename U>
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NonnullOwnPtr(NonnullOwnPtr<U>&& other)
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2020-04-05 12:32:30 +03:00
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: m_ptr(other.leak_ptr())
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2019-07-24 09:25:27 +03:00
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{
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ASSERT(m_ptr);
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}
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~NonnullOwnPtr()
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{
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clear();
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#ifdef SANITIZE_PTRS
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if constexpr (sizeof(T*) == 8)
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m_ptr = (T*)(0xe3e3e3e3e3e3e3e3);
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else
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m_ptr = (T*)(0xe3e3e3e3);
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#endif
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}
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NonnullOwnPtr(const NonnullOwnPtr&) = delete;
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template<typename U>
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NonnullOwnPtr(const NonnullOwnPtr<U>&) = delete;
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NonnullOwnPtr& operator=(const NonnullOwnPtr&) = delete;
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template<typename U>
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NonnullOwnPtr& operator=(const NonnullOwnPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr(const RefPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr(const NonnullRefPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr(const WeakPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr& operator=(const RefPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr& operator=(const NonnullRefPtr<U>&) = delete;
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template<typename U>
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NonnullOwnPtr& operator=(const WeakPtr<U>&) = delete;
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NonnullOwnPtr& operator=(NonnullOwnPtr&& other)
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{
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2020-01-19 18:03:57 +03:00
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NonnullOwnPtr ptr(move(other));
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swap(ptr);
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2019-07-24 09:25:27 +03:00
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return *this;
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}
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template<typename U>
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NonnullOwnPtr& operator=(NonnullOwnPtr<U>&& other)
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{
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2020-01-19 18:03:57 +03:00
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NonnullOwnPtr ptr(move(other));
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swap(ptr);
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2019-07-24 09:25:27 +03:00
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return *this;
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}
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2020-08-05 16:51:36 +03:00
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[[nodiscard]] T* leak_ptr()
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2019-07-24 09:25:27 +03:00
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{
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return exchange(m_ptr, nullptr);
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}
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T* ptr() { return m_ptr; }
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const T* ptr() const { return m_ptr; }
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T* operator->() { return m_ptr; }
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const T* operator->() const { return m_ptr; }
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T& operator*() { return *m_ptr; }
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const T& operator*() const { return *m_ptr; }
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operator const T*() const { return m_ptr; }
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operator T*() { return m_ptr; }
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2019-11-07 20:00:05 +03:00
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operator bool() const = delete;
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bool operator!() const = delete;
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2020-01-19 18:03:57 +03:00
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void swap(NonnullOwnPtr& other)
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{
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::swap(m_ptr, other.m_ptr);
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}
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template<typename U>
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void swap(NonnullOwnPtr<U>& other)
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{
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::swap(m_ptr, other.m_ptr);
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}
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2020-05-08 22:38:47 +03:00
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template<typename U>
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NonnullOwnPtr<U> release_nonnull()
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{
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ASSERT(m_ptr);
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return NonnullOwnPtr<U>(NonnullOwnPtr<U>::Adopt, static_cast<U&>(*leak_ptr()));
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}
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2019-07-24 09:25:27 +03:00
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private:
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void clear()
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{
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if (!m_ptr)
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return;
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delete m_ptr;
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m_ptr = nullptr;
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}
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T* m_ptr = nullptr;
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};
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2020-04-01 22:04:10 +03:00
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template<typename T>
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inline NonnullOwnPtr<T> adopt_own(T& object)
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{
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return NonnullOwnPtr<T>(NonnullOwnPtr<T>::Adopt, object);
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}
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2019-07-24 09:25:27 +03:00
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template<class T, class... Args>
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inline NonnullOwnPtr<T>
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make(Args&&... args)
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{
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return NonnullOwnPtr<T>(NonnullOwnPtr<T>::Adopt, *new T(forward<Args>(args)...));
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}
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template<typename T>
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struct Traits<NonnullOwnPtr<T>> : public GenericTraits<NonnullOwnPtr<T>> {
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2019-08-14 12:47:38 +03:00
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using PeekType = const T*;
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2019-08-14 22:21:15 +03:00
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static unsigned hash(const NonnullOwnPtr<T>& p) { return int_hash((u32)p.ptr()); }
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2019-07-24 09:25:27 +03:00
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static bool equals(const NonnullOwnPtr<T>& a, const NonnullOwnPtr<T>& b) { return a.ptr() == b.ptr(); }
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};
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template<typename T>
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inline const LogStream& operator<<(const LogStream& stream, const NonnullOwnPtr<T>& value)
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{
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return stream << value.ptr();
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}
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2020-01-19 18:03:57 +03:00
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template<typename T, typename U>
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inline void swap(NonnullOwnPtr<T>& a, NonnullOwnPtr<U>& b)
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{
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a.swap(b);
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}
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2019-07-24 09:25:27 +03:00
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}
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2020-04-01 22:04:10 +03:00
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using AK::adopt_own;
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2019-07-24 09:25:27 +03:00
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using AK::make;
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using AK::NonnullOwnPtr;
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