Function semu_try_free

freebsd/kern/sysv_sem.c:427–438

}

static int
semu_try_free(struct sem_undo *suptr)
{

	SEMUNDO_LOCKASSERT(MA_OWNED);

	if (suptr->un_cnt != 0)
		return (0);
	LIST_REMOVE(suptr, un_next);
	LIST_INSERT_HEAD(&semu_free_list, suptr, un_next);
	return (1);
}

/*
 * Adjust a particular entry for a particular proc