57 	itimer_t *it = &state->tfd_itimer;  in timerfd_itimer_lock()  local
61 	while (it->it_lock & ITLK_LOCKED) {  in timerfd_itimer_lock()
62 		it->it_blockers++;  in timerfd_itimer_lock()
63 		cv_wait(&it->it_cv, &state->tfd_lock);  in timerfd_itimer_lock()
64 		it->it_blockers--;  in timerfd_itimer_lock()
67 	it->it_lock |= ITLK_LOCKED;  in timerfd_itimer_lock()
71 	return (it);  in timerfd_itimer_lock()
75 timerfd_itimer_unlock(timerfd_state_t *state, itimer_t *it)  in timerfd_itimer_unlock()  argument
77 	VERIFY(it == &state->tfd_itimer);  in timerfd_itimer_unlock()
78 	VERIFY(it->it_lock & ITLK_LOCKED);  in timerfd_itimer_unlock()
82 	it->it_lock &= ~ITLK_LOCKED;  in timerfd_itimer_unlock()
84 	if (it->it_blockers)  in timerfd_itimer_unlock()
85 		cv_signal(&it->it_cv);  in timerfd_itimer_unlock()
91 timerfd_fire(itimer_t *it)  in timerfd_fire()  argument
93 	timerfd_state_t *state = it->it_frontend;  in timerfd_fire()
168 	 * Our tfd_fired is non-zero; slurp its value and then clear it.  in timerfd_read()
256 	itimer_t *it;  in timerfd_ioctl()  local
265 		it = timerfd_itimer_lock(state);  in timerfd_ioctl()
267 		if (it->it_backend != NULL) {  in timerfd_ioctl()
268 			timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
272 		if ((it->it_backend = clock_get_backend(arg)) == NULL) {  in timerfd_ioctl()
273 			timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
279 		 * of locking CLOCK_REALTIME-based timers -- it is safe to  in timerfd_ioctl()
282 		it->it_proc = &p0;  in timerfd_ioctl()
284 		err = it->it_backend->clk_timer_create(it, timerfd_fire);  in timerfd_ioctl()
287 			it->it_backend = NULL;  in timerfd_ioctl()
288 			timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
292 		it->it_frontend = state;  in timerfd_ioctl()
293 		timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
299 		it = timerfd_itimer_lock(state);  in timerfd_ioctl()
301 		if (it->it_backend == NULL) {  in timerfd_ioctl()
302 			timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
306 		err = it->it_backend->clk_timer_gettime(it, &when);  in timerfd_ioctl()
307 		timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
327 		it = timerfd_itimer_lock(state);  in timerfd_ioctl()
329 		if (it->it_backend == NULL) {  in timerfd_ioctl()
330 			timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
335 			err = it->it_backend->clk_timer_gettime(it, &oval);  in timerfd_ioctl()
338 				timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
353 		 * timer value, but before it can fire with the new one).  in timerfd_ioctl()
360 		 * this is possible, it does not (for the moment) seem worth  in timerfd_ioctl()
361 		 * it: if the timer is firing at essentially the same moment  in timerfd_ioctl()
362 		 * that it's being reprogrammed, there is a higher-level race  in timerfd_ioctl()
364 		 * have to properly resolve -- and it seems reasonable to  in timerfd_ioctl()
365 		 * simply allow the program to resolve it in this case.  in timerfd_ioctl()
371 		err = it->it_backend->clk_timer_settime(it,  in timerfd_ioctl()
374 		timerfd_itimer_unlock(state, it);  in timerfd_ioctl()
397 	itimer_t *it;  in timerfd_close()  local
408 	 * No one can get to this timer; we don't need to lock it -- we can  in timerfd_close()
409 	 * just call on the backend to delete it.  in timerfd_close()
411 	it = &state->tfd_itimer;  in timerfd_close()
413 	if (it->it_backend != NULL)  in timerfd_close()
414 		it->it_backend->clk_timer_delete(it);  in timerfd_close()