#define ASTOBJ_CONTAINER_UNLINK(container,obj) \
        ({ \
                typeof((container)->head) found = NULL; \
                typeof((container)->head) prev = NULL; \
                ASTOBJ_CONTAINER_TRAVERSE(container, !found, do { \
                        if (iterator== obj) { \
                                found = iterator; \
                                found->next[0] = NULL; \
                                ASTOBJ_CONTAINER_WRLOCK(container); \
                                if (prev) \
                                        prev->next[0] = next; \
                                else \
                                        (container)->head = next; \
                                ASTOBJ_CONTAINER_UNLOCK(container); \
                        } \
                        prev = iterator; \
                } while (0)); \
                found; \
        })