Function seldrain

freebsd/kern/sys_generic.c:1768–1781

Drain the waiters tied to all the selfd belonging the specified selinfo. */

/* Drain the waiters tied to all the selfd belonging the specified selinfo. */
void
seldrain(struct selinfo *sip)
{

	/*
	 * This feature is already provided by doselwakeup(), thus it is
	 * enough to go for it.
	 * Eventually, the context, should take care to avoid races
	 * between thread calling select()/poll() and file descriptor
	 * detaching, but, again, the races are just the same as
	 * selwakeup().
	 */
        doselwakeup(sip, -1);
}

/*
 * Record a select request.