mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 08:24:58 +00:00
4bbb0a5c35
This works very similarly to MarkedVector<T>, but instead of expecting
T to be Value or a GC-allocated pointer type, T can be anything.
Every pointer-sized value in the vector's storage will be checked during
conservative root scanning.
In other words, this allows you to put something like this in a
ConservativeVector<Foo> and it will be protected from GC:
struct Foo {
i64 number;
Value some_value;
GCPtr<Object> some_object;
};
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*
|
|
* Copyright (c) 2024, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/HashMap.h>
|
|
#include <AK/IntrusiveList.h>
|
|
#include <AK/Vector.h>
|
|
#include <LibJS/Forward.h>
|
|
#include <LibJS/Heap/Cell.h>
|
|
#include <LibJS/Heap/HeapRoot.h>
|
|
|
|
namespace JS {
|
|
|
|
class ConservativeVectorBase {
|
|
public:
|
|
virtual ReadonlySpan<FlatPtr> possible_values() const = 0;
|
|
|
|
protected:
|
|
explicit ConservativeVectorBase(Heap&);
|
|
~ConservativeVectorBase();
|
|
|
|
ConservativeVectorBase& operator=(ConservativeVectorBase const&);
|
|
|
|
Heap* m_heap { nullptr };
|
|
IntrusiveListNode<ConservativeVectorBase> m_list_node;
|
|
|
|
public:
|
|
using List = IntrusiveList<&ConservativeVectorBase::m_list_node>;
|
|
};
|
|
|
|
template<typename T, size_t inline_capacity>
|
|
class ConservativeVector final
|
|
: public ConservativeVectorBase
|
|
, public Vector<T, inline_capacity> {
|
|
|
|
public:
|
|
explicit ConservativeVector(Heap& heap)
|
|
: ConservativeVectorBase(heap)
|
|
{
|
|
}
|
|
|
|
virtual ~ConservativeVector() = default;
|
|
|
|
ConservativeVector(ConservativeVector const& other)
|
|
: ConservativeVectorBase(*other.m_heap)
|
|
, Vector<T, inline_capacity>(other)
|
|
{
|
|
}
|
|
|
|
ConservativeVector(ConservativeVector&& other)
|
|
: ConservativeVectorBase(*other.m_heap)
|
|
, Vector<T, inline_capacity>(move(static_cast<Vector<T, inline_capacity>&>(other)))
|
|
{
|
|
}
|
|
|
|
ConservativeVector& operator=(ConservativeVector const& other)
|
|
{
|
|
Vector<T, inline_capacity>::operator=(other);
|
|
ConservativeVectorBase::operator=(other);
|
|
return *this;
|
|
}
|
|
|
|
virtual ReadonlySpan<FlatPtr> possible_values() const override
|
|
{
|
|
return ReadonlySpan<FlatPtr> { reinterpret_cast<FlatPtr const*>(this->data()), this->size() };
|
|
}
|
|
};
|
|
|
|
}
|