68 ev_init(struct evvar *ev)  in ev_init()  argument
71 	ev->ev_get = ev->ev_put = 0;  in ev_init()
72 	ev->ev_q = malloc((u_long)EV_QSIZE * sizeof(struct firm_event),  in ev_init()
74 	selinit(&ev->ev_sel);  in ev_init()
81 ev_fini(struct evvar *ev)  in ev_fini()  argument
84 	seldestroy(&ev->ev_sel);  in ev_fini()
85 	free(ev->ev_q, M_DEVBUF);  in ev_fini()
93 ev_read(struct evvar *ev, struct uio *uio, int flags)  in ev_read()  argument
103 	while (ev->ev_get == ev->ev_put) {  in ev_read()
108 		ev->ev_wanted = 1;  in ev_read()
109 		error = tsleep((void *)ev, PEVENT | PCATCH, "firm_event", 0);  in ev_read()
119 	if (ev->ev_put < ev->ev_get)  in ev_read()
120 		cnt = EV_QSIZE - ev->ev_get;	/* events in [get..QSIZE) */  in ev_read()
122 		cnt = ev->ev_put - ev->ev_get;	/* events in [get..put) */  in ev_read()
128 		error = (*ev_out32_hook)(&ev->ev_q[ev->ev_get], cnt, uio);  in ev_read()
130 		error = uiomove((void *)&ev->ev_q[ev->ev_get],  in ev_read()
138 	if ((ev->ev_get = (ev->ev_get + cnt) % EV_QSIZE) != 0 ||  in ev_read()
139 	    n == 0 || error || (cnt = ev->ev_put) == 0)  in ev_read()
144 		error = (*ev_out32_hook)(&ev->ev_q[0], cnt, uio);  in ev_read()
146 		error = uiomove((void *)&ev->ev_q[0],  in ev_read()
148 	ev->ev_get = cnt;  in ev_read()
153 ev_poll(struct evvar *ev, int events, struct lwp *l)  in ev_poll()  argument
158 		if (ev->ev_get == ev->ev_put)  in ev_poll()
159 			selrecord(l, &ev->ev_sel);  in ev_poll()
172 	struct evvar *ev = kn->kn_hook;  in filt_evrdetach()  local
176 	selremove_knote(&ev->ev_sel, kn);  in filt_evrdetach()
183 	struct evvar *ev = kn->kn_hook;  in filt_evread()  local
185 	if (ev->ev_get == ev->ev_put)  in filt_evread()
188 	if (ev->ev_get < ev->ev_put)  in filt_evread()
189 		kn->kn_data = ev->ev_put - ev->ev_get;  in filt_evread()
191 		kn->kn_data = (EV_QSIZE - ev->ev_get) +  in filt_evread()
192 		    ev->ev_put;  in filt_evread()
207 ev_kqfilter(struct evvar *ev, struct knote *kn)  in ev_kqfilter()  argument
220 	kn->kn_hook = ev;  in ev_kqfilter()
223 	selrecord_knote(&ev->ev_sel, kn);  in ev_kqfilter()