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db137867 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * kqueue.c: FreeBSD kqueue 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 | * | |
25 | * $Id: kqueue.c 25038 2008-01-23 16:03:08Z androsyn $ | |
26 | */ | |
27 | ||
28 | #include <libratbox_config.h> | |
29 | #include <ratbox_lib.h> | |
30 | #include <commio-int.h> | |
31 | #include <event-int.h> | |
32 | ||
33 | #if defined(HAVE_SYS_EVENT_H) && (HAVE_KEVENT) | |
34 | ||
35 | #include <sys/event.h> | |
36 | ||
37 | #define KE_LENGTH 128 | |
38 | ||
39 | /* jlemon goofed up and didn't add EV_SET until fbsd 4.3 */ | |
40 | ||
41 | #ifndef EV_SET | |
42 | #define EV_SET(kevp, a, b, c, d, e, f) do { \ | |
43 | (kevp)->ident = (a); \ | |
44 | (kevp)->filter = (b); \ | |
45 | (kevp)->flags = (c); \ | |
46 | (kevp)->fflags = (d); \ | |
47 | (kevp)->data = (e); \ | |
48 | (kevp)->udata = (f); \ | |
49 | } while(0) | |
50 | #endif | |
51 | ||
52 | #ifdef EVFILT_TIMER | |
53 | #define KQUEUE_SCHED_EVENT | |
54 | #endif | |
55 | ||
56 | ||
57 | static void kq_update_events(rb_fde_t *, short, PF *); | |
58 | static int kq; | |
59 | static struct timespec zero_timespec; | |
60 | ||
61 | static struct kevent *kqlst; /* kevent buffer */ | |
62 | static int kqmax; /* max structs to buffer */ | |
63 | static int kqoff; /* offset into the buffer */ | |
64 | ||
65 | ||
66 | int | |
67 | rb_setup_fd_kqueue(rb_fde_t * F) | |
68 | { | |
69 | return 0; | |
70 | } | |
71 | ||
72 | static void | |
73 | kq_update_events(rb_fde_t * F, short filter, PF * handler) | |
74 | { | |
75 | PF *cur_handler; | |
76 | int kep_flags; | |
77 | ||
78 | switch (filter) | |
79 | { | |
80 | case EVFILT_READ: | |
81 | cur_handler = F->read_handler; | |
82 | break; | |
83 | case EVFILT_WRITE: | |
84 | cur_handler = F->write_handler; | |
85 | break; | |
86 | default: | |
87 | /* XXX bad! -- adrian */ | |
88 | return; | |
89 | break; | |
90 | } | |
91 | ||
92 | if((cur_handler == NULL && handler != NULL) || (cur_handler != NULL && handler == NULL)) | |
93 | { | |
94 | struct kevent *kep; | |
95 | ||
96 | kep = kqlst + kqoff; | |
97 | ||
98 | if(handler != NULL) | |
99 | { | |
7b224e33 | 100 | kep_flags = EV_ADD | EV_ONESHOT; |
db137867 AC |
101 | } |
102 | else | |
103 | { | |
104 | kep_flags = EV_DELETE; | |
105 | } | |
106 | ||
107 | EV_SET(kep, (uintptr_t) F->fd, filter, kep_flags, 0, 0, (void *) F); | |
108 | ||
109 | if(++kqoff == kqmax) | |
110 | { | |
111 | int ret; | |
112 | ||
113 | ret = kevent(kq, kqlst, kqoff, NULL, 0, &zero_timespec); | |
114 | /* jdc -- someone needs to do error checking... */ | |
115 | if(ret == -1) | |
116 | { | |
117 | rb_lib_log("kq_update_events(): kevent(): %s", strerror(errno)); | |
118 | return; | |
119 | } | |
120 | kqoff = 0; | |
121 | } | |
122 | } | |
123 | } | |
124 | ||
125 | ||
126 | ||
127 | /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ | |
128 | /* Public functions */ | |
129 | ||
130 | ||
131 | /* | |
132 | * rb_init_netio | |
133 | * | |
134 | * This is a needed exported function which will be called to initialise | |
135 | * the network loop code. | |
136 | */ | |
137 | int | |
138 | rb_init_netio_kqueue(void) | |
139 | { | |
140 | kq = kqueue(); | |
141 | if(kq < 0) | |
142 | { | |
143 | return errno; | |
144 | } | |
145 | kqmax = getdtablesize(); | |
146 | kqlst = rb_malloc(sizeof(struct kevent) * kqmax); | |
147 | rb_open(kq, RB_FD_UNKNOWN, "kqueue fd"); | |
148 | zero_timespec.tv_sec = 0; | |
149 | zero_timespec.tv_nsec = 0; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /* | |
155 | * rb_setselect | |
156 | * | |
157 | * This is a needed exported function which will be called to register | |
158 | * and deregister interest in a pending IO state for a given FD. | |
159 | */ | |
160 | void | |
161 | rb_setselect_kqueue(rb_fde_t * F, unsigned int type, PF * handler, void *client_data) | |
162 | { | |
163 | lrb_assert(IsFDOpen(F)); | |
164 | ||
165 | if(type & RB_SELECT_READ) | |
166 | { | |
167 | kq_update_events(F, EVFILT_READ, handler); | |
168 | F->read_handler = handler; | |
169 | F->read_data = client_data; | |
170 | } | |
171 | if(type & RB_SELECT_WRITE) | |
172 | { | |
173 | kq_update_events(F, EVFILT_WRITE, handler); | |
174 | F->write_handler = handler; | |
175 | F->write_data = client_data; | |
176 | } | |
177 | } | |
178 | ||
179 | /* | |
180 | * Check all connections for new connections and input data that is to be | |
181 | * processed. Also check for connections with data queued and whether we can | |
182 | * write it out. | |
183 | */ | |
184 | ||
185 | /* | |
186 | * rb_select | |
187 | * | |
188 | * Called to do the new-style IO, courtesy of squid (like most of this | |
189 | * new IO code). This routine handles the stuff we've hidden in | |
190 | * rb_setselect and fd_table[] and calls callbacks for IO ready | |
191 | * events. | |
192 | */ | |
193 | ||
194 | int | |
195 | rb_select_kqueue(long delay) | |
196 | { | |
197 | int num, i; | |
198 | static struct kevent ke[KE_LENGTH]; | |
199 | struct timespec poll_time; | |
200 | struct timespec *pt; | |
201 | rb_fde_t *F; | |
202 | ||
203 | ||
204 | if(delay < 0) { | |
205 | pt = NULL; | |
206 | } | |
207 | else { | |
208 | pt = &poll_time; | |
209 | poll_time.tv_sec = delay / 1000; | |
210 | poll_time.tv_nsec = (delay % 1000) * 1000000; | |
211 | } | |
212 | ||
213 | for (;;) | |
214 | { | |
215 | num = kevent(kq, kqlst, kqoff, ke, KE_LENGTH, pt); | |
216 | kqoff = 0; | |
217 | ||
218 | if(num >= 0) | |
219 | break; | |
220 | ||
221 | if(rb_ignore_errno(errno)) | |
222 | break; | |
223 | ||
224 | rb_set_time(); | |
225 | ||
226 | return RB_ERROR; | |
227 | ||
228 | /* NOTREACHED */ | |
229 | } | |
230 | ||
231 | rb_set_time(); | |
232 | ||
233 | if(num == 0) | |
234 | return RB_OK; /* No error.. */ | |
235 | ||
236 | for (i = 0; i < num; i++) | |
237 | { | |
238 | PF *hdl = NULL; | |
239 | ||
240 | if(ke[i].flags & EV_ERROR) | |
241 | { | |
242 | errno = ke[i].data; | |
243 | /* XXX error == bad! -- adrian */ | |
244 | continue; /* XXX! */ | |
245 | } | |
246 | ||
247 | switch (ke[i].filter) | |
248 | { | |
249 | ||
250 | case EVFILT_READ: | |
251 | F = ke[i].udata; | |
252 | if((hdl = F->read_handler) != NULL) | |
253 | { | |
254 | F->read_handler = NULL; | |
255 | hdl(F, F->read_data); | |
256 | } | |
257 | ||
258 | break; | |
259 | ||
260 | case EVFILT_WRITE: | |
261 | F = ke[i].udata; | |
262 | if((hdl = F->write_handler) != NULL) | |
263 | { | |
264 | F->write_handler = NULL; | |
265 | hdl(F, F->write_data); | |
266 | } | |
267 | break; | |
268 | #if defined(EVFILT_TIMER) | |
269 | case EVFILT_TIMER: | |
270 | rb_run_event(ke[i].udata); | |
271 | break; | |
272 | #endif | |
273 | default: | |
274 | /* Bad! -- adrian */ | |
275 | break; | |
276 | } | |
277 | } | |
278 | return RB_OK; | |
279 | } | |
280 | static int can_do_event = 0; | |
281 | int | |
282 | rb_kqueue_supports_event(void) | |
283 | { | |
284 | struct kevent kv; | |
285 | struct timespec ts; | |
286 | int xkq; | |
287 | ||
288 | if(can_do_event == 1) | |
289 | return 1; | |
290 | if(can_do_event == -1) | |
291 | return 0; | |
292 | ||
293 | xkq = kqueue(); | |
294 | ts.tv_sec = 0; | |
295 | ts.tv_nsec = 1000; | |
296 | ||
297 | ||
298 | EV_SET(&kv, (uintptr_t) 0x0, EVFILT_TIMER, EV_ADD | EV_ONESHOT, 0, 1, 0); | |
299 | if(kevent(xkq, &kv, 1, NULL, 0, NULL) < 0) | |
300 | { | |
301 | can_do_event = -1; | |
302 | close(xkq); | |
303 | return 0; | |
304 | } | |
305 | close(xkq); | |
306 | can_do_event = 1; | |
307 | return 1; | |
308 | } | |
309 | ||
310 | int | |
311 | rb_kqueue_sched_event(struct ev_entry *event, int when) | |
312 | { | |
313 | struct kevent kev; | |
314 | int kep_flags; | |
315 | ||
316 | kep_flags = EV_ADD; | |
317 | if(event->frequency == 0) | |
318 | kep_flags |= EV_ONESHOT; | |
319 | EV_SET(&kev, (uintptr_t) event, EVFILT_TIMER, kep_flags, 0, when * 1000, event); | |
320 | if(kevent(kq, &kev, 1, NULL, 0, NULL) < 0) | |
321 | return 0; | |
322 | return 1; | |
323 | } | |
324 | ||
325 | void | |
326 | rb_kqueue_unsched_event(struct ev_entry *event) | |
327 | { | |
328 | struct kevent kev; | |
329 | EV_SET(&kev, (uintptr_t) event, EVFILT_TIMER, EV_DELETE, 0, 0, event); | |
330 | kevent(kq, &kev, 1, NULL, 0, NULL); | |
331 | } | |
332 | ||
333 | void | |
334 | rb_kqueue_init_event(void) | |
335 | { | |
336 | return; | |
337 | } | |
338 | ||
339 | #else /* kqueue not supported */ | |
340 | int | |
341 | rb_init_netio_kqueue(void) | |
342 | { | |
343 | errno = ENOSYS; | |
344 | return -1; | |
345 | } | |
346 | ||
347 | void | |
348 | rb_setselect_kqueue(rb_fde_t * F, unsigned int type, PF * handler, void *client_data) | |
349 | { | |
350 | errno = ENOSYS; | |
351 | return; | |
352 | } | |
353 | ||
354 | int | |
355 | rb_select_kqueue(long delay) | |
356 | { | |
357 | errno = ENOSYS; | |
358 | return -1; | |
359 | } | |
360 | ||
361 | int | |
362 | rb_setup_fd_kqueue(rb_fde_t * F) | |
363 | { | |
364 | errno = ENOSYS; | |
365 | return -1; | |
366 | } | |
367 | ||
368 | #endif | |
369 | ||
370 | #if !defined(HAVE_KEVENT) || !defined(KQUEUE_SCHED_EVENT) | |
371 | void | |
372 | rb_kqueue_init_event(void) | |
373 | { | |
374 | return; | |
375 | } | |
376 | ||
377 | int | |
378 | rb_kqueue_sched_event(struct ev_entry *event, int when) | |
379 | { | |
380 | errno = ENOSYS; | |
381 | return -1; | |
382 | } | |
383 | ||
384 | void | |
385 | rb_kqueue_unsched_event(struct ev_entry *event) | |
386 | { | |
387 | return; | |
388 | } | |
389 | ||
390 | int | |
391 | rb_kqueue_supports_event(void) | |
392 | { | |
393 | errno = ENOSYS; | |
394 | return 0; | |
395 | } | |
396 | #endif /* !HAVE_KEVENT || !KQUEUE_SCHED_EVENT */ |