bsd/kern/sys_generic.c

958 static int selscan(struct proc *p, struct _select * sel,
986 	struct _select *sel;
992 	sel = &uth->uu_select;
1020 	if (sel->nbytes < (3 * ni)) {
1024 		if (sel->ibits != NULL)
1025 			FREE(sel->ibits, M_TEMP);
1026 		if (sel->obits != NULL) {
1027 			FREE(sel->obits, M_TEMP);
1029 			sel->obits = NULL;
1032 		MALLOC(sel->ibits, u_int32_t *, nbytes, M_TEMP, M_WAITOK | M_ZERO);
1033 		if (sel->ibits == NULL)
1035 		MALLOC(sel->obits, u_int32_t *, nbytes, M_TEMP, M_WAITOK | M_ZERO);
1036 		if (sel->obits == NULL) {
1037 			FREE(sel->ibits, M_TEMP);
1038 			sel->ibits = NULL;
1041 		sel->nbytes = nbytes;
1046 		bzero((caddr_t)sel->ibits, sel->nbytes);
1047 		bzero((caddr_t)sel->obits, sel->nbytes);
1056 			(caddr_t)&sel->ibits[(x) * nw], ni))) \
1087 										tvtoabstime(&atv), &sel->abstime);
1090 		sel->abstime = 0;
1092 	if ( (error = selcount(p, sel->ibits, uap->nd, &count)) ) {
1096 	sel->count = count;
1116 	sel->wql = (char *)uth->uu_wqset + SIZEOF_WAITQUEUE_SET;
1157 	struct _select *sel;
1169 	sel = &uth->uu_select;
1173 	if (sel->count == 0)
1184 	if (sel->count) {
1192 		error = selscan(p, sel, uap->nd, retval, sel_pass, (wait_queue_sub_t)uth->uu_wqset);
1213 		if (now >= sel->abstime)
1228 	if (uap->tv && sel->abstime == 0) {
1241 	if (sel->count &&(sel_pass == SEL_SECONDPASS))
1246 					     NULL, THREAD_ABORTSAFE, sel->abstime);
1265 		seldrop(p, sel->ibits, uap->nd);
1279 			copyout((caddr_t)&sel->obits[(x) * nw], uap->name, ni))) \
1299  *		sel			The per-thread select context structure
1312 selscan(struct proc *p, struct _select *sel, int nfd, int32_t *retval,
1338 	ibits = sel->ibits;
1339 	obits = sel->obits;
1340 	wql = sel->wql;
1344 	count = sel->count;