2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/select.h>
34 static struct blocker *blockers;
35 static int exitstatus;
38 struct blocker *n, *p;
45 static void addblock(struct blocker *bl)
53 static void remblock(struct blocker *bl)
63 struct selected mblock(time_t to, int n, struct selected *spec)
66 struct blocker bls[n];
68 to = (to > 0)?(time(NULL) + to):0;
69 for(i = 0; i < n; i++) {
70 bls[i] = (struct blocker){
80 for(i = 0; i < n; i++)
83 return((struct selected){.fd = -1, .ev = -1});
84 return((struct selected){.fd = bls[id].fd, .ev = bls[id].rev});
87 int block(int fd, int ev, time_t to)
92 if(fd >= FD_SETSIZE) {
93 flog(LOG_ERR, "tried to use more file descriptors than select() can handle: fd %i", fd);
97 bl = (struct blocker) {
101 .to = (to > 0)?(time(NULL) + to):0,
113 fd_set rfds, wfds, efds;
114 struct blocker *bl, *nbl;
115 struct timeval toval;
121 while(blockers != NULL) {
128 for(bl = blockers; bl; bl = bl->n) {
130 FD_SET(bl->fd, &rfds);
131 if(bl->ev & EV_WRITE)
132 FD_SET(bl->fd, &wfds);
133 FD_SET(bl->fd, &efds);
136 if((bl->to != 0) && ((timeout == 0) || (timeout > bl->to)))
141 toval.tv_sec = timeout - now;
143 ret = select(maxfd + 1, &rfds, &wfds, &efds, timeout?(&toval):NULL);
146 flog(LOG_CRIT, "ioloop: select errored out: %s", strerror(errno));
147 /* To avoid CPU hogging in case it's bad, which it
153 for(bl = blockers; bl; bl = nbl) {
156 if(FD_ISSET(bl->fd, &rfds))
158 if(FD_ISSET(bl->fd, &wfds))
160 if(FD_ISSET(bl->fd, &efds))
162 if((ev < 0) || (ev & bl->ev)) {
167 resume(bl->th, bl->id);
169 } else if((bl->to != 0) && (bl->to <= now)) {
174 resume(bl->th, bl->id);
183 void exitioloop(int status)