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;
50 static void addblock(struct blocker *bl)
58 static void remblock(struct blocker *bl)
67 if((bl->it->bl = bl->n) != NULL)
68 bl->it->bl->it = bl->it;
73 struct selected mblock(time_t to, int n, struct selected *spec)
76 struct blocker bls[n];
78 to = (to > 0)?(time(NULL) + to):0;
79 for(i = 0; i < n; i++) {
80 bls[i] = (struct blocker){
90 for(i = 0; i < n; i++)
93 return((struct selected){.fd = -1, .ev = -1});
94 return((struct selected){.fd = bls[id].fd, .ev = bls[id].rev});
97 int block(int fd, int ev, time_t to)
102 if(fd >= FD_SETSIZE) {
103 flog(LOG_ERR, "tried to use more file descriptors than select() can handle: fd %i", fd);
107 bl = (struct blocker) {
111 .to = (to > 0)?(time(NULL) + to):0,
123 fd_set rfds, wfds, efds;
126 struct timeval toval;
132 while(blockers != NULL) {
139 for(bl = blockers; bl; bl = bl->n) {
141 FD_SET(bl->fd, &rfds);
142 if(bl->ev & EV_WRITE)
143 FD_SET(bl->fd, &wfds);
144 FD_SET(bl->fd, &efds);
147 if((bl->to != 0) && ((timeout == 0) || (timeout > bl->to)))
152 toval.tv_sec = timeout - now;
154 ret = select(maxfd + 1, &rfds, &wfds, &efds, timeout?(&toval):NULL);
157 flog(LOG_CRIT, "ioloop: select errored out: %s", strerror(errno));
158 /* To avoid CPU hogging in case it's bad, which it
164 for(bl = it.bl = blockers; bl; bl = it.bl) {
165 if((it.bl = bl->n) != NULL)
168 if(FD_ISSET(bl->fd, &rfds))
170 if(FD_ISSET(bl->fd, &wfds))
172 if(FD_ISSET(bl->fd, &efds))
174 if((ev < 0) || (ev & bl->ev)) {
179 resume(bl->th, bl->id);
181 } else if((bl->to != 0) && (bl->to <= now)) {
186 resume(bl->th, bl->id);
197 void exitioloop(int status)