LibJS: Use IntrusiveList for keeping track of WeakContainers

1 files changed, 31 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Runtime/WeakContainer.cpp b/Userland/Libraries/LibJS/Runtime/WeakContainer.cpp
new file mode 100644
index 0000000000..387cbea5cc
--- /dev/null
+++ b/Userland/Libraries/LibJS/Runtime/WeakContainer.cpp
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibJS/Heap/Heap.h>
+#include <LibJS/Runtime/WeakContainer.h>
+
+namespace JS {
+
+WeakContainer::WeakContainer(Heap& heap)
+    : m_heap(heap)
+{
+    m_heap.did_create_weak_container({}, *this);
+}
+
+WeakContainer::~WeakContainer()
+{
+    deregister();
+}
+
+void WeakContainer::deregister()
+{
+    if (!m_registered)
+        return;
+    m_heap.did_destroy_weak_container({}, *this);
+    m_registered = false;
+}
+
+}