70 ev_init(register struct evvar *ev)  in ev_init()  argument
73 	ev->ev_get = ev->ev_put = 0;  in ev_init()
74 	ev->ev_q = kmem_zalloc(EV_Q_ALLOCSIZE, KM_SLEEP);  in ev_init()
75 	selinit(&ev->ev_sel);  in ev_init()
82 ev_fini(register struct evvar *ev)  in ev_fini()  argument
85 	seldestroy(&ev->ev_sel);  in ev_fini()
86 	kmem_free(ev->ev_q, EV_Q_ALLOCSIZE);  in ev_fini()
94 ev_read(register struct evvar *ev, struct uio *uio, int flags)  in ev_read()  argument
104 	while (ev->ev_get == ev->ev_put) {  in ev_read()
109 		ev->ev_wanted = 1;  in ev_read()
110 		error = tsleep((void *)ev, PEVENT | PCATCH, "firm_event", 0);  in ev_read()
120 	if (ev->ev_put < ev->ev_get)  in ev_read()
121 		cnt = EV_QSIZE - ev->ev_get;	/* events in [get..QSIZE) */  in ev_read()
123 		cnt = ev->ev_put - ev->ev_get;	/* events in [get..put) */  in ev_read()
128 	error = uiomove((void *)&ev->ev_q[ev->ev_get],  in ev_read()
136 	if ((ev->ev_get = (ev->ev_get + cnt) % EV_QSIZE) != 0 ||  in ev_read()
137 	    n == 0 || error || (cnt = ev->ev_put) == 0)  in ev_read()
141 	error = uiomove((void *)&ev->ev_q[0],  in ev_read()
143 	ev->ev_get = cnt;  in ev_read()
148 ev_poll(register struct evvar *ev, int events, struct lwp *l)  in ev_poll()  argument
154 		if (ev->ev_get != ev->ev_put)  in ev_poll()
157 			selrecord(l, &ev->ev_sel);  in ev_poll()
166 	struct evvar *ev = kn->kn_hook;  in filt_evrdetach()  local
170 	selremove_knote(&ev->ev_sel, kn);  in filt_evrdetach()
177 	struct evvar *ev = kn->kn_hook;  in filt_evread()  local
179 	if (ev->ev_get == ev->ev_put)  in filt_evread()
182 	if (ev->ev_get < ev->ev_put)  in filt_evread()
183 		kn->kn_data = ev->ev_put - ev->ev_get;  in filt_evread()
185 		kn->kn_data = (EV_QSIZE - ev->ev_get) +  in filt_evread()
186 		    ev->ev_put;  in filt_evread()
201 ev_kqfilter(struct evvar *ev, struct knote *kn)  in ev_kqfilter()  argument
214 	kn->kn_hook = ev;  in ev_kqfilter()
217 	selrecord_knote(&ev->ev_sel, kn);  in ev_kqfilter()