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LibJS: Generify the garbage collector's weak container notifications

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This will allow us to use the same interface for other JS weak
containers like the WeakMap & WeakRef.
This commit is contained in:
Idan Horowitz 2021-06-12 05:23:33 +03:00 • committed by Linus Groh
parent 06fdc26656
commit 1a8ee5d8d7
6 changed files with 51 additions and 17 deletions
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31
Userland/Libraries/LibJS/Runtime/WeakContainer.h Normal file
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@ -0,0 +1,31 @@
/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Heap/Heap.h>
namespace JS {
class WeakContainer {
public:
explicit WeakContainer(Heap& heap)
: m_heap(heap)
{
m_heap.did_create_weak_container({}, *this);
}
virtual ~WeakContainer()
{
m_heap.did_destroy_weak_container({}, *this);
}
virtual void remove_sweeped_cells(Badge<Heap>, Vector<Cell*>&) = 0;
private:
Heap& m_heap;
};
}

3
Userland/Libraries/LibJS/Runtime/WeakSet.cpp
View file

@ -15,13 +15,12 @@ WeakSet* WeakSet::create(GlobalObject& global_object)
WeakSet::WeakSet(Object& prototype)
: Object(prototype)
, WeakContainer(heap())
{
heap().did_create_weak_set({}, *this);
}
WeakSet::~WeakSet()
{
heap().did_destroy_weak_set({}, *this);
}
void WeakSet::remove_sweeped_cells(Badge<Heap>, Vector<Cell*>& cells)

7
Userland/Libraries/LibJS/Runtime/WeakSet.h
View file

@ -9,10 +9,13 @@
#include <AK/HashTable.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/WeakContainer.h>
namespace JS {
class WeakSet : public Object {
class WeakSet final
: public Object
, public WeakContainer {
JS_OBJECT(WeakSet, Object);
public:
@ -24,7 +27,7 @@ public:
HashTable<Cell*> const& values() const { return m_values; };
HashTable<Cell*>& values() { return m_values; };
void remove_sweeped_cells(Badge<Heap>, Vector<Cell*>&);
virtual void remove_sweeped_cells(Badge<Heap>, Vector<Cell*>&) override;
private:
HashTable<Cell*> m_values; // This stores Cell pointers instead of Object pointers to aide with sweeping