mirror of
https://github.com/SerenityOS/serenity
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0dc9af5f7e
Also run it across the whole tree to get everything using the One True Style. We don't yet run this in an automated fashion as it's a little slow, but there is a snippet to do so in makeall.sh.
71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
#pragma once
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#include "Weakable.h"
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namespace AK {
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template<typename T>
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class OwnPtr;
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template<typename T>
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class WeakPtr {
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friend class Weakable<T>;
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public:
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WeakPtr() {}
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WeakPtr(std::nullptr_t) {}
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template<typename U>
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WeakPtr(WeakPtr<U>&& other)
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: m_link(reinterpret_cast<WeakLink<T>*>(other.leak_link()))
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{
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}
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template<typename U>
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WeakPtr& operator=(WeakPtr<U>&& other)
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{
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m_link = reinterpret_cast<WeakLink<T>*>(other.leak_link());
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return *this;
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}
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operator bool() const { return ptr(); }
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T* ptr() { return m_link ? m_link->ptr() : nullptr; }
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const T* ptr() const { return m_link ? m_link->ptr() : nullptr; }
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T* operator->() { return ptr(); }
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const T* operator->() const { return ptr(); }
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T& operator*() { return *ptr(); }
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const T& operator*() const { return *ptr(); }
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operator const T*() const { return ptr(); }
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operator T*() { return ptr(); }
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bool is_null() const { return !m_link || !m_link->ptr(); }
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void clear() { m_link = nullptr; }
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WeakLink<T>* leak_link() { return m_link.leak_ref(); }
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bool operator==(const OwnPtr<T>& other) const { return ptr() == other.ptr(); }
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private:
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WeakPtr(RetainPtr<WeakLink<T>>&& link)
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: m_link(move(link))
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{
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}
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RetainPtr<WeakLink<T>> m_link;
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};
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template<typename T>
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inline WeakPtr<T> Weakable<T>::make_weak_ptr()
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{
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if (!m_link)
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m_link = adopt(*new WeakLink<T>(static_cast<T&>(*this)));
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return WeakPtr<T>(m_link.copy_ref());
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}
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}
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using AK::WeakPtr;
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