3 * - wrappers for poll(2)
6 * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 int adns_beforepoll(adns_state ads, struct pollfd *fds, int *nfds_io, int *timeout_io,
30 const struct timeval *now) {
31 struct timeval tv_nowbuf, tv_tobuf, *tv_to;
32 int space, found, timeout_ms, r;
33 struct pollfd fds_tmp[MAX_POLLFDS];
35 adns__consistency(ads,cc_entex);
38 adns__must_gettimeofday(ads,&now,&tv_nowbuf);
39 if (!now) { *nfds_io= 0; r= 0; goto xit; }
41 timeout_ms= *timeout_io;
42 if (timeout_ms == -1) {
45 tv_tobuf.tv_sec= timeout_ms / 1000;
46 tv_tobuf.tv_usec= (timeout_ms % 1000)*1000;
50 adns__timeouts(ads, 0, &tv_to,&tv_tobuf, *now);
53 assert(tv_to == &tv_tobuf);
54 timeout_ms= (tv_tobuf.tv_usec+999)/1000;
55 assert(tv_tobuf.tv_sec < (INT_MAX-timeout_ms)/1000);
56 timeout_ms += tv_tobuf.tv_sec*1000;
60 *timeout_io= timeout_ms;
64 if (space >= MAX_POLLFDS) {
65 found= adns__pollfds(ads,fds);
68 found= adns__pollfds(ads,fds_tmp);
70 if (space < found) { r= ERANGE; goto xit; }
71 memcpy(fds,fds_tmp,sizeof(struct pollfd)*found);
75 adns__consistency(ads,cc_entex);
79 void adns_afterpoll(adns_state ads, const struct pollfd *fds, int nfds,
80 const struct timeval *now) {
81 struct timeval tv_buf;
83 adns__consistency(ads,cc_entex);
84 adns__must_gettimeofday(ads,&now,&tv_buf);
86 adns__timeouts(ads, 1, 0,0, *now);
87 adns__fdevents(ads, fds,nfds, 0,0,0,0, *now,0);
89 adns__consistency(ads,cc_entex);