mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 23:50:19 +00:00
f7577585a6
This allows you to clear all the WeakPtrs pointing at a Weakable *now* instead of waiting until the Weakable is destroyed.
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "Assertions.h"
|
|
#include "RefCounted.h"
|
|
#include "RefPtr.h"
|
|
|
|
#define WEAKABLE_DEBUG
|
|
|
|
namespace AK {
|
|
|
|
template<typename T>
|
|
class Weakable;
|
|
template<typename T>
|
|
class WeakPtr;
|
|
|
|
template<typename T>
|
|
class WeakLink : public RefCounted<WeakLink<T>> {
|
|
friend class Weakable<T>;
|
|
|
|
public:
|
|
T* ptr() { return m_ptr; }
|
|
const T* ptr() const { return m_ptr; }
|
|
|
|
private:
|
|
explicit WeakLink(T& weakable)
|
|
: m_ptr(&weakable)
|
|
{
|
|
}
|
|
T* m_ptr;
|
|
};
|
|
|
|
template<typename T>
|
|
class Weakable {
|
|
private:
|
|
class Link;
|
|
|
|
public:
|
|
WeakPtr<T> make_weak_ptr();
|
|
|
|
protected:
|
|
Weakable() {}
|
|
|
|
~Weakable()
|
|
{
|
|
#ifdef WEAKABLE_DEBUG
|
|
m_being_destroyed = true;
|
|
#endif
|
|
revoke_weak_ptrs();
|
|
}
|
|
|
|
void revoke_weak_ptrs()
|
|
{
|
|
if (m_link)
|
|
m_link->m_ptr = nullptr;
|
|
}
|
|
|
|
private:
|
|
RefPtr<WeakLink<T>> m_link;
|
|
#ifdef WEAKABLE_DEBUG
|
|
bool m_being_destroyed { false };
|
|
#endif
|
|
};
|
|
|
|
}
|
|
|
|
using AK::Weakable;
|