timer_delete() deletes timer, timerid. [timerid is created by timer_create().] If timerid is an armed timer when timer_delete() is called, it will appear as if the timer is automatically disarmed before removal. [It is unspecified what happens to any pending signals.] timer_delete() returns 0 on success timer_delete returns -1 on failure timer_delete() may set errno==EINVAL if timerid is not a valid timer ID