/[svn]/ircd-hybrid/src/s_bsd_devpoll.c
ViewVC logotype

Contents of /ircd-hybrid/src/s_bsd_devpoll.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 31 - (show annotations)
Sun Oct 2 20:34:05 2005 UTC (14 years, 10 months ago) by knight
File MIME type: text/x-chdr
File size: 4462 byte(s)
- Fix svn:keywords

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * s_bsd_devpoll.c: /dev/poll compatible network routines.
4 *
5 * Originally by Adrian Chadd <adrian@creative.net.au>
6 * Copyright (C) 2002 Hybrid Development Team
7 *
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 of the License, or
11 * (at your option) any later version.
12 *
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.
17 *
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
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 * USA
22 *
23 * $Id$
24 */
25
26 #include "stdinc.h"
27 #include <sys/ioctl.h>
28 /* HPUX uses devpoll.h and not sys/devpoll.h */
29 #ifdef HAVE_DEVPOLL_H
30 # include <devpoll.h>
31 #else
32 # ifdef HAVE_SYS_DEVPOLL_H
33 # include <sys/devpoll.h>
34 # else
35 # error "No devpoll.h found! Try ./configuring and letting the script choose for you."
36 # endif
37 #endif
38 #include "fdlist.h"
39 #include "ircd.h"
40 #include "s_bsd.h"
41 #include "s_log.h"
42
43 static fde_t dpfd;
44
45 /*
46 * init_netio
47 *
48 * This is a needed exported function which will be called to initialise
49 * the network loop code.
50 */
51 void
52 init_netio(void)
53 {
54 int fd;
55
56 if ((fd = open("/dev/poll", O_RDWR)) < 0)
57 {
58 ilog(L_CRIT, "init_netio: Couldn't open /dev/poll - %d: %s",
59 errno, strerror(errno));
60 exit(115); /* Whee! */
61 }
62
63 fd_open(&dpfd, fd, 0, "/dev/poll file descriptor");
64 }
65
66 /*
67 * Write an update to the devpoll filter.
68 * See, we end up having to do a seperate (?) remove before we do an
69 * add of a new polltype, so we have to have this function seperate from
70 * the others.
71 */
72 static void
73 devpoll_write_update(int fd, int events)
74 {
75 struct pollfd pfd;
76
77 /* Build the pollfd entry */
78 pfd.revents = 0;
79 pfd.fd = fd;
80 pfd.events = events;
81
82 /* Write the thing to our poll fd */
83 if (write(dpfd.fd, &pfd, sizeof(pfd)) != sizeof(pfd))
84 ilog(L_NOTICE, "devpoll_write_update: dpfd write failed %d: %s",
85 errno, strerror(errno));
86 }
87
88 /*
89 * comm_setselect
90 *
91 * This is a needed exported function which will be called to register
92 * and deregister interest in a pending IO state for a given FD.
93 */
94 void
95 comm_setselect(fde_t *F, unsigned int type, PF *handler,
96 void *client_data, time_t timeout)
97 {
98 int new_events;
99
100 if ((type & COMM_SELECT_READ))
101 {
102 F->read_handler = handler;
103 F->read_data = client_data;
104 }
105
106 if ((type & COMM_SELECT_WRITE))
107 {
108 F->write_handler = handler;
109 F->write_data = client_data;
110 }
111
112 new_events = (F->read_handler ? POLLRDNORM : 0) |
113 (F->write_handler ? POLLWRNORM : 0);
114
115 if (timeout != 0)
116 F->timeout = CurrentTime + (timeout / 1000);
117
118 if (new_events != F->evcache)
119 {
120 devpoll_write_update(F->fd, POLLREMOVE);
121 if ((F->evcache = new_events))
122 devpoll_write_update(F->fd, new_events);
123 }
124 }
125
126 /*
127 * comm_select
128 *
129 * Called to do the new-style IO, courtesy of squid (like most of this
130 * new IO code). This routine handles the stuff we've hidden in
131 * comm_setselect and fd_table[] and calls callbacks for IO ready
132 * events.
133 */
134 void
135 comm_select(void)
136 {
137 int num, i;
138 struct pollfd pollfds[128];
139 struct dvpoll dopoll;
140 PF *hdl;
141 fde_t *F;
142
143 dopoll.dp_timeout = SELECT_DELAY;
144 dopoll.dp_nfds = 128;
145 dopoll.dp_fds = &pollfds[0];
146 num = ioctl(dpfd.fd, DP_POLL, &dopoll);
147
148 set_time();
149
150 if (num < 0)
151 {
152 #ifdef HAVE_USLEEP
153 usleep(50000); /* avoid 99% CPU in comm_select */
154 #endif
155 return;
156 }
157
158 for (i = 0; i < num; i++)
159 {
160 F = lookup_fd(dopoll.dp_fds[i].fd);
161 if (F == NULL || !F->flags.open)
162 continue;
163
164 if ((dopoll.dp_fds[i].revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR)))
165 if ((hdl = F->read_handler) != NULL)
166 {
167 F->read_handler = NULL;
168 hdl(F, F->read_data);
169 if (!F->flags.open)
170 continue;
171 }
172
173 if ((dopoll.dp_fds[i].revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR)))
174 if ((hdl = F->write_handler) != NULL)
175 {
176 F->write_handler = NULL;
177 hdl(F, F->write_data);
178 if (!F->flags.open)
179 continue;
180 }
181
182 comm_setselect(F, 0, NULL, NULL, 0);
183 }
184 }

Properties

Name Value
svn:eol-style native
svn:keywords "Id Revision"

svnadmin@ircd-hybrid.org
ViewVC Help
Powered by ViewVC 1.1.28