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obj: add header-offset field to object_type

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this allows the object header to be placed anywhere within the larger
object structure.

the object system now also ensures that the object is zero-initialised
during allocation.
This commit is contained in:
max 🍓
2023-05-06 22:22:05 +01:00
parent d8de0ddfe4
commit a79d109fcc
7 changed files with 12 additions and 2 deletions
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8
obj/object.c
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@@ -48,11 +48,15 @@ struct object *object_create(struct object_type *type)
}
struct vm_cache *cache = &type->ob_cache;
struct object *obj = vm_cache_alloc(cache, 0);
if (!obj) {
void *obj_buf = vm_cache_alloc(cache, 0);
if (!obj_buf) {
return NULL;
}
memset(obj_buf, 0x00, type->ob_size);
struct object *obj = (struct object *)((unsigned char *)obj_buf + type->ob_header_offset);
obj->ob_type = type;
obj->ob_lock = SPIN_LOCK_INIT;
obj->ob_magic = OBJECT_MAGIC;