RGBCube/serenity
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Start using WeakPtr for some of the WindowManager window pointers.

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This commit is contained in:
Andreas Kling 2018-10-13 17:00:45 +02:00
parent 16fff6dff7
commit 560405667e
5 changed files with 29 additions and 8 deletions
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19
AK/WeakPtr.h
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@ -11,11 +11,28 @@ public:
WeakPtr() { }
WeakPtr(std::nullptr_t) { }
template<typename U>
WeakPtr& operator=(WeakPtr<U>&& other)
{
m_link = reinterpret_cast<WeakLink<T>*>(other.leakLink());
return *this;
}
operator bool() const { return ptr(); }
T* ptr() { return m_link ? m_link->ptr() : nullptr; }
const T* ptr() const { return m_link ? m_link->ptr() : nullptr; }
T* operator->() { return ptr(); }
const T* operator->() const { return ptr(); }
T& operator*() { return *ptr(); }
const T& operator*() const { return *ptr(); }
bool isNull() const { return !m_link || !m_link->ptr(); }
void clear() { m_link = nullptr; }
WeakLink<T>* leakLink() { return m_link.leakRef(); }
private:
WeakPtr(RetainPtr<WeakLink<T>>&& link) : m_link(std::move(link)) { }
@ -27,7 +44,7 @@ template<typename T>
inline WeakPtr<T> Weakable<T>::makeWeakPtr()
{
if (!m_link)
m_link = adopt(*new WeakLink<T>(*this));
m_link = adopt(*new WeakLink<T>(static_cast<T&>(*this)));
return WeakPtr<T>(m_link.copyRef());
}