]>
Commit | Line | Data |
---|---|---|
db137867 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * s_bsd_poll.c: POSIX poll() compatible network routines. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2001 Adrian Chadd <adrian@creative.net.au> | |
8 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | |
23 | * USA | |
24 | * | |
3202e249 | 25 | * $Id: poll.c 26092 2008-09-19 15:13:52Z androsyn $ |
db137867 | 26 | */ |
fe037171 EM |
27 | #include <librb_config.h> |
28 | #include <rb_lib.h> | |
db137867 AC |
29 | #include <commio-int.h> |
30 | ||
31 | #if defined(HAVE_POLL) && (HAVE_SYS_POLL_H) | |
32 | #include <sys/poll.h> | |
33 | ||
34 | ||
35 | /* I hate linux -- adrian */ | |
36 | #ifndef POLLRDNORM | |
37 | #define POLLRDNORM POLLIN | |
38 | #endif | |
39 | #ifndef POLLWRNORM | |
40 | #define POLLWRNORM POLLOUT | |
41 | #endif | |
42 | ||
43 | struct _pollfd_list | |
44 | { | |
45 | struct pollfd *pollfds; | |
46 | int maxindex; /* highest FD number */ | |
47 | int allocated; /* number of pollfds allocated */ | |
48 | }; | |
49 | ||
50 | typedef struct _pollfd_list pollfd_list_t; | |
51 | ||
52 | static pollfd_list_t pollfd_list; | |
53 | ||
54 | int | |
3202e249 | 55 | rb_setup_fd_poll(rb_fde_t *F) |
db137867 AC |
56 | { |
57 | return 0; | |
58 | } | |
59 | ||
60 | ||
61 | /* | |
62 | * rb_init_netio | |
63 | * | |
64 | * This is a needed exported function which will be called to initialise | |
65 | * the network loop code. | |
66 | */ | |
67 | int | |
68 | rb_init_netio_poll(void) | |
69 | { | |
70 | int fd; | |
71 | pollfd_list.pollfds = rb_malloc(rb_getmaxconnect() * (sizeof(struct pollfd))); | |
72 | pollfd_list.allocated = rb_getmaxconnect(); | |
3202e249 | 73 | for(fd = 0; fd < rb_getmaxconnect(); fd++) |
db137867 AC |
74 | { |
75 | pollfd_list.pollfds[fd].fd = -1; | |
76 | } | |
77 | pollfd_list.maxindex = 0; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static void | |
82 | resize_pollarray(int fd) | |
83 | { | |
c2ac22cc | 84 | if(rb_unlikely(fd >= pollfd_list.allocated)) |
db137867 AC |
85 | { |
86 | int x, old_value = pollfd_list.allocated; | |
87 | pollfd_list.allocated += 1024; | |
88 | pollfd_list.pollfds = | |
89 | rb_realloc(pollfd_list.pollfds, | |
90 | pollfd_list.allocated * (sizeof(struct pollfd))); | |
91 | memset(&pollfd_list.pollfds[old_value + 1], 0, sizeof(struct pollfd) * 1024); | |
3202e249 | 92 | for(x = old_value + 1; x < pollfd_list.allocated; x++) |
db137867 AC |
93 | { |
94 | pollfd_list.pollfds[x].fd = -1; | |
95 | } | |
96 | } | |
97 | } | |
98 | ||
99 | /* | |
100 | * rb_setselect | |
101 | * | |
102 | * This is a needed exported function which will be called to register | |
103 | * and deregister interest in a pending IO state for a given FD. | |
104 | */ | |
105 | void | |
3202e249 | 106 | rb_setselect_poll(rb_fde_t *F, unsigned int type, PF * handler, void *client_data) |
db137867 AC |
107 | { |
108 | if(F == NULL) | |
109 | return; | |
110 | ||
111 | if(type & RB_SELECT_READ) | |
112 | { | |
113 | F->read_handler = handler; | |
114 | F->read_data = client_data; | |
115 | if(handler != NULL) | |
116 | F->pflags |= POLLRDNORM; | |
117 | else | |
118 | F->pflags &= ~POLLRDNORM; | |
119 | } | |
120 | if(type & RB_SELECT_WRITE) | |
121 | { | |
122 | F->write_handler = handler; | |
123 | F->write_data = client_data; | |
124 | if(handler != NULL) | |
125 | F->pflags |= POLLWRNORM; | |
126 | else | |
127 | F->pflags &= ~POLLWRNORM; | |
128 | } | |
129 | resize_pollarray(F->fd); | |
130 | ||
131 | if(F->pflags <= 0) | |
132 | { | |
133 | pollfd_list.pollfds[F->fd].events = 0; | |
134 | pollfd_list.pollfds[F->fd].fd = -1; | |
135 | if(F->fd == pollfd_list.maxindex) | |
136 | { | |
3202e249 VY |
137 | while(pollfd_list.maxindex >= 0 |
138 | && pollfd_list.pollfds[pollfd_list.maxindex].fd == -1) | |
db137867 AC |
139 | pollfd_list.maxindex--; |
140 | } | |
141 | } | |
142 | else | |
143 | { | |
144 | pollfd_list.pollfds[F->fd].events = F->pflags; | |
145 | pollfd_list.pollfds[F->fd].fd = F->fd; | |
146 | if(F->fd > pollfd_list.maxindex) | |
147 | pollfd_list.maxindex = F->fd; | |
148 | } | |
149 | ||
150 | } | |
151 | ||
152 | /* int rb_select(unsigned long delay) | |
153 | * Input: The maximum time to delay. | |
154 | * Output: Returns -1 on error, 0 on success. | |
155 | * Side-effects: Deregisters future interest in IO and calls the handlers | |
156 | * if an event occurs for an FD. | |
157 | * Comments: Check all connections for new connections and input data | |
158 | * that is to be processed. Also check for connections with data queued | |
159 | * and whether we can write it out. | |
160 | * Called to do the new-style IO, courtesy of squid (like most of this | |
161 | * new IO code). This routine handles the stuff we've hidden in | |
162 | * rb_setselect and fd_table[] and calls callbacks for IO ready | |
163 | * events. | |
164 | */ | |
165 | ||
166 | int | |
167 | rb_select_poll(long delay) | |
168 | { | |
169 | int num; | |
170 | int fd; | |
171 | int ci; | |
172 | PF *hdl; | |
173 | void *data; | |
174 | struct pollfd *pfd; | |
175 | int revents; | |
176 | ||
177 | num = poll(pollfd_list.pollfds, pollfd_list.maxindex + 1, delay); | |
3202e249 | 178 | rb_set_time(); |
db137867 AC |
179 | if(num < 0) |
180 | { | |
181 | if(!rb_ignore_errno(errno)) | |
182 | return RB_OK; | |
183 | else | |
184 | return RB_ERROR; | |
185 | } | |
186 | if(num == 0) | |
3202e249 VY |
187 | return RB_OK; |
188 | ||
db137867 | 189 | /* XXX we *could* optimise by falling out after doing num fds ... */ |
3202e249 | 190 | for(ci = 0; ci < pollfd_list.maxindex + 1; ci++) |
db137867 AC |
191 | { |
192 | rb_fde_t *F; | |
193 | pfd = &pollfd_list.pollfds[ci]; | |
194 | ||
195 | revents = pfd->revents; | |
3202e249 | 196 | fd = pfd->fd; |
db137867 AC |
197 | if(revents == 0 || fd == -1) |
198 | continue; | |
199 | ||
200 | F = rb_find_fd(fd); | |
201 | if(F == NULL) | |
202 | continue; | |
3202e249 | 203 | |
db137867 AC |
204 | if(revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR)) |
205 | { | |
206 | hdl = F->read_handler; | |
207 | data = F->read_data; | |
208 | F->read_handler = NULL; | |
209 | F->read_data = NULL; | |
210 | if(hdl) | |
211 | hdl(F, data); | |
212 | } | |
213 | ||
214 | if(IsFDOpen(F) && (revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR))) | |
215 | { | |
216 | hdl = F->write_handler; | |
217 | data = F->write_data; | |
218 | F->write_handler = NULL; | |
219 | F->write_data = NULL; | |
3202e249 | 220 | if(hdl) |
db137867 AC |
221 | hdl(F, data); |
222 | } | |
223 | ||
224 | if(F->read_handler == NULL) | |
225 | rb_setselect_poll(F, RB_SELECT_READ, NULL, NULL); | |
226 | if(F->write_handler == NULL) | |
227 | rb_setselect_poll(F, RB_SELECT_WRITE, NULL, NULL); | |
3202e249 | 228 | |
db137867 AC |
229 | } |
230 | return 0; | |
231 | } | |
232 | ||
233 | #else /* poll not supported */ | |
234 | int | |
235 | rb_init_netio_poll(void) | |
236 | { | |
237 | errno = ENOSYS; | |
238 | return -1; | |
239 | } | |
240 | ||
241 | void | |
3202e249 | 242 | rb_setselect_poll(rb_fde_t *F, unsigned int type, PF * handler, void *client_data) |
db137867 AC |
243 | { |
244 | errno = ENOSYS; | |
245 | return; | |
246 | } | |
247 | ||
248 | int | |
249 | rb_select_poll(long delay) | |
250 | { | |
251 | errno = ENOSYS; | |
252 | return -1; | |
253 | } | |
254 | ||
255 | int | |
3202e249 | 256 | rb_setup_fd_poll(rb_fde_t *F) |
db137867 AC |
257 | { |
258 | errno = ENOSYS; | |
259 | return -1; | |
260 | } | |
261 | ||
262 | #endif |