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kernel: add support for recursive object destruction (without recursion)

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this system makes it possible for an object that forms part of a tree
to be safely recursively destroyed without using recursion.
This commit is contained in:
max 🍓
2026-02-23 18:34:12 +00:00
parent 37ae7aeef7
commit 5690dd5b9c
2 changed files with 26 additions and 4 deletions
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5
include/kernel/object.h
View File

@@ -52,7 +52,10 @@ enum object_type_flags {
}; };
struct object_ops { struct object_ops {
kern_status_t (*destroy)(struct object *obj); kern_status_t (*destroy)(struct object *obj, struct queue *q);
kern_status_t (*destroy_recurse)(
struct queue_entry *entry,
struct object **out);
}; };
struct object_type { struct object_type {

25
kernel/object.c
View File

@@ -83,6 +83,15 @@ struct object *object_ref(struct object *obj)
return obj; return obj;
} }
static void __cleanup(struct object *obj, struct queue *queue)
{
if (HAS_OP(obj, destroy)) {
obj->ob_type->ob_ops.destroy(obj, queue);
}
vm_cache_free(&obj->ob_type->ob_cache, obj);
}
static void object_cleanup(struct object *obj, unsigned long flags) static void object_cleanup(struct object *obj, unsigned long flags)
{ {
if (obj->ob_refcount > 0 || obj->ob_handles > 0) { if (obj->ob_refcount > 0 || obj->ob_handles > 0) {
@@ -90,11 +99,21 @@ static void object_cleanup(struct object *obj, unsigned long flags)
return; return;
} }
if (HAS_OP(obj, destroy)) { struct queue queue = QUEUE_INIT;
obj->ob_type->ob_ops.destroy(obj); __cleanup(obj, &queue);
if (!HAS_OP(obj, destroy_recurse)) {
return;
} }
vm_cache_free(&obj->ob_type->ob_cache, obj); while (!queue_empty(&queue)) {
struct queue_entry *entry = queue_pop_front(&queue);
struct object *child = NULL;
obj->ob_type->ob_ops.destroy_recurse(entry, &child);
if (child) {
__cleanup(child, &queue);
}
}
} }
void object_unref(struct object *obj) void object_unref(struct object *obj)