ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/event.c
(Generate patch)

Comparing libev/event.c (file contents):
Revision 1.1 by root, Thu Nov 1 15:39:16 2007 UTC vs.
Revision 1.44 by root, Sat Oct 16 06:46:55 2010 UTC

1/* 1/*
2 * libevent compatibility layer 2 * libevent compatibility layer
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#include <stddef.h> 40#include <stddef.h>
33#include <stdlib.h> 41#include <stdlib.h>
34#include <sys/time.h> 42#include <assert.h>
35 43
44#ifdef EV_EVENT_H
45# include EV_EVENT_H
46#else
36#include "event.h" 47# include "event.h"
48#endif
37 49
50#if EV_MULTIPLICITY
51# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
52# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
53#else
54# define dLOOPev
55# define dLOOPbase
56#endif
57
58/* never accessed, will always be cast from/to ev_loop */
38struct event_base 59struct event_base
39{ 60{
40 int dummy; 61 int dummy;
41}; 62};
42 63
43static int x_actives;
44
45static struct event_base x_base, *x_cur; 64static struct event_base *ev_x_cur;
46
47static void
48tv_set (struct timeval *tv, ev_tstamp at)
49{
50 tv->tv_sec = (long)at;
51 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
52}
53 65
54static ev_tstamp 66static ev_tstamp
55tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
56{ 68{
57 if (tv) 69 if (tv)
70 {
58 return tv->tv_sec + tv->tv_usec * 1e-6; 71 ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
72 return after ? after : 1e-6;
73 }
59 else 74 else
60 return -1.; 75 return -1.;
61} 76}
62 77
63#define EVENT_VERSION(a,b) # a "." # b 78#define EVENT_STRINGIFY(s) # s
79#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
64 80
65const char *event_get_version (void) 81const char *event_get_version (void)
66{ 82{
83 /* returns ABI, not API or library, version */
67 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 84 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
68} 85}
69 86
70const char *event_get_method (void) 87const char *event_get_method (void)
71{ 88{
72 return "libev"; 89 return "libev";
73} 90}
74 91
75void *event_init (void) 92void *event_init (void)
76{ 93{
77 if (ev_init (0)) 94#if EV_MULTIPLICITY
78 return x_cur = &x_base; 95 if (ev_x_cur)
96 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
97 else
98 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
99#else
100 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
79 101
80 return 0; 102 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
103#endif
104
105 return ev_x_cur;
81} 106}
82 107
83void event_base_free (struct event_base *base) 108void event_base_free (struct event_base *base)
84{ 109{
110 dLOOPbase;
111
112#if EV_MULTIPLICITY
113 if (ev_default_loop (EVFLAG_AUTO) != loop)
114 ev_loop_destroy (loop);
115#endif
116}
117
118int event_dispatch (void)
119{
120 return event_base_dispatch (ev_x_cur);
121}
122
123#ifdef EV_STANDALONE
124void event_set_log_callback (event_log_cb cb)
125{
85 /* nop */ 126 /* nop */
86} 127}
87 128#endif
88int event_dispatch (void)
89{
90 return event_base_dispatch (x_cur);
91}
92
93void event_set_log_callback (event_log_cb cb)
94{
95 /* nop */
96}
97 129
98int event_loop (int flags) 130int event_loop (int flags)
99{ 131{
100 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
101} 133}
102 134
103int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
104{ 136{
105 event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
106} 138}
107 139
108static void 140static void
109x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
110{ 142{
111 if (ev_is_active (&ev->sig))
112 {
113 ev_signal_stop (&ev->sig);
114 --x_actives;
115 }
116
117 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (&ev->io))
118 {
119 ev_io_stop (&ev->io);
120 --x_actives;
121 }
122
123 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 143 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
124 144
125 if (revents & EV_TIMEOUT)
126 --x_actives;
127
128 ev->ev_res = revents; 145 ev->ev_res = revents;
129 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 146 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
130} 147}
131 148
132static void 149static void
133x_cb_io (struct ev_io *w, int revents)
134{
135 x_cb ((struct event *)(((char *)w) - offsetof (struct event, io)), revents);
136}
137
138static void
139x_cb_to (struct ev_timer *w, int revents)
140{
141 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents);
142}
143
144static void
145x_cb_sig (struct ev_signal *w, int revents) 150ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
146{ 151{
152 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
153
154 if (revents & EV_ERROR)
155 event_del (ev);
156
157 ev_x_cb (ev, revents);
158}
159
160static void
161ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
162{
147 x_cb ((struct event *)(((char *)w) - offsetof (struct event, sig)), revents); 163 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
164
165 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
166 event_del (ev);
167
168 ev_x_cb (ev, revents);
169}
170
171static void
172ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
173{
174 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
175
176 event_del (ev);
177
178 ev_x_cb (ev, revents);
148} 179}
149 180
150void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 181void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
151{ 182{
183 if (events & EV_SIGNAL)
184 ev_init (&ev->iosig.sig, ev_x_cb_sig);
185 else
152 ev_watcher_init (&ev->io, x_cb_io); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
187
153 ev_watcher_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
154 ev_watcher_init (&ev->sig, x_cb_sig);
155 189
156 ev->ev_base = x_cur; 190 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
157 ev->ev_fd = fd; 191 ev->ev_fd = fd;
158 ev->ev_events = events; 192 ev->ev_events = events;
159 ev->ev_pri = 0; 193 ev->ev_pri = 0;
160 ev->ev_callback = cb; 194 ev->ev_callback = cb;
161 ev->ev_arg = arg; 195 ev->ev_arg = arg;
162 ev->ev_res = 0; 196 ev->ev_res = 0;
197 ev->ev_flags = EVLIST_INIT;
163} 198}
164 199
165int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 200int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
166{ 201{
167 event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
168} 203}
169 204
170int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
171{ 206{
207 dLOOPev;
208
209 if (ev->ev_events & EV_SIGNAL)
210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
214 ev_signal_start (EV_A_ &ev->iosig.sig);
215
216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
218 }
219 else if (ev->ev_events & (EV_READ | EV_WRITE))
220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
223 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
224 ev_io_start (EV_A_ &ev->iosig.io);
225
226 ev->ev_flags |= EVLIST_INSERTED;
227 }
228 }
229
172 if (tv) 230 if (tv)
173 { 231 {
174 if (ev_is_active (&ev->to)) 232 ev->to.repeat = ev_tv_get (tv);
175 { 233 ev_timer_again (EV_A_ &ev->to);
234 ev->ev_flags |= EVLIST_TIMEOUT;
235 }
236 else
237 {
176 ev_timer_stop (&ev->to); 238 ev_timer_stop (EV_A_ &ev->to);
177 --x_actives; 239 ev->ev_flags &= ~EVLIST_TIMEOUT;
178 }
179
180 ev_timer_set (&ev->to, tv_get (tv), 0.);
181 ev_timer_start (&ev->to);
182 ++x_actives;
183 }
184
185 if (ev->ev_events & (EV_READ|EV_WRITE))
186 { 240 }
187 if (ev_is_active (&ev->io))
188 {
189 ev_io_stop (&ev->io);
190 --x_actives;
191 }
192 241
193 ev_io_set (&ev->io, ev->ev_fd, ev->ev_events); 242 ev->ev_flags |= EVLIST_ACTIVE;
194 ev_io_start (&ev->io); 243
195 ++x_actives; 244 return 0;
196 } 245}
246
247int event_del (struct event *ev)
248{
249 dLOOPev;
197 250
198 if (ev->ev_events & EV_SIGNAL) 251 if (ev->ev_events & EV_SIGNAL)
199 {
200 if (ev_is_active (&ev->sig))
201 {
202 ev_signal_stop (&ev->sig); 252 ev_signal_stop (EV_A_ &ev->iosig.sig);
203 --x_actives; 253 else if (ev->ev_events & (EV_READ | EV_WRITE))
204 }
205
206 ev_signal_set (&ev->sig, ev->ev_fd);
207 ev_signal_start (&ev->sig);
208 ++x_actives;
209 }
210
211 return 0;
212}
213
214int event_del (struct event *ev)
215{
216 if (ev_is_active (&ev->io))
217 {
218 ev_io_stop (&ev->io); 254 ev_io_stop (EV_A_ &ev->iosig.io);
219 --x_actives;
220 }
221 255
222 if (ev_is_active (&ev->to)) 256 if (ev_is_active (&ev->to))
223 {
224 ev_timer_stop (&ev->to); 257 ev_timer_stop (EV_A_ &ev->to);
225 --x_actives;
226 }
227 258
228 if (ev_is_active (&ev->sig)) 259 ev->ev_flags = EVLIST_INIT;
229 {
230 ev_signal_stop (&ev->sig);
231 --x_actives;
232 }
233 260
234 return 0; 261 return 0;
235} 262}
236 263
237void event_active (struct event *ev, int fd, short events) 264void event_active (struct event *ev, int res, short ncalls)
238{ 265{
239 /* unclear what this does, likely internal-use */ 266 dLOOPev;
267
268 if (res & EV_TIMEOUT)
269 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
270
271 if (res & EV_SIGNAL)
272 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
273
274 if (res & (EV_READ | EV_WRITE))
275 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
240} 276}
241 277
242int event_pending (struct event *ev, short events, struct timeval *tv) 278int event_pending (struct event *ev, short events, struct timeval *tv)
243{ 279{
244 short revents; 280 short revents = 0;
281 dLOOPev;
245 282
246 if (ev->io.pending) 283 if (ev->ev_events & EV_SIGNAL)
284 {
285 /* sig */
286 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
287 revents |= EV_SIGNAL;
288 }
289 else if (ev->ev_events & (EV_READ | EV_WRITE))
290 {
291 /* io */
292 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
247 revents |= ev->ev_events & (EV_READ | EV_WRITE); 293 revents |= ev->ev_events & (EV_READ | EV_WRITE);
294 }
248 295
249 if (ev->to.pending) 296 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
250 { 297 {
251 revents |= EV_TIMEOUT; 298 revents |= EV_TIMEOUT;
252 299
253 if (tv) 300 if (tv)
254 tv_set (tv, ev_now); /* not sure if this is right :) */ 301 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
255 } 302 }
256
257 if (ev->sig.pending)
258 revents |= EV_SIGNAL;
259 303
260 return events & revents; 304 return events & revents;
261} 305}
262 306
263int event_priority_init (int npri) 307int event_priority_init (int npri)
264{ 308{
265 return event_base_priority_init (x_cur, npri); 309 return event_base_priority_init (ev_x_cur, npri);
266} 310}
267 311
268int event_priority_set (struct event *ev, int pri) 312int event_priority_set (struct event *ev, int pri)
269{ 313{
270 ev->ev_pri = pri; 314 ev->ev_pri = pri;
… …
279 return 0; 323 return 0;
280} 324}
281 325
282int event_base_loop (struct event_base *base, int flags) 326int event_base_loop (struct event_base *base, int flags)
283{ 327{
284 do 328 dLOOPbase;
285 { 329
286 ev_loop (flags | EVLOOP_ONESHOT); 330 ev_loop (EV_A_ flags);
287 }
288 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
289 331
290 return 0; 332 return 0;
291} 333}
292 334
293int event_base_dispatch (struct event_base *base) 335int event_base_dispatch (struct event_base *base)
294{ 336{
295 return event_base_loop (base, 0); 337 return event_base_loop (base, 0);
296} 338}
297 339
298static void 340static void
299x_loopexit_cb (int revents, void *arg) 341ev_x_loopexit_cb (int revents, void *base)
300{ 342{
301 ev_loop_done = 2; 343 dLOOPbase;
344
345 ev_unloop (EV_A_ EVUNLOOP_ONE);
302} 346}
303 347
304int event_base_loopexit (struct event_base *base, struct timeval *tv) 348int event_base_loopexit (struct event_base *base, struct timeval *tv)
305{ 349{
306 ev_tstamp after = tv_get (tv); 350 ev_tstamp after = ev_tv_get (tv);
351 dLOOPbase;
307 352
308 ev_once (-1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 353 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
309}
310 354
355 return 0;
356}
357
311struct x_once 358struct ev_x_once
312{ 359{
313 int fd; 360 int fd;
314 void (*cb)(int, short, void *); 361 void (*cb)(int, short, void *);
315 void *arg; 362 void *arg;
316}; 363};
317 364
318static void 365static void
319x_once_cb (int revents, void *arg) 366ev_x_once_cb (int revents, void *arg)
320{ 367{
321 struct x_once *once = arg; 368 struct ev_x_once *once = (struct ev_x_once *)arg;
322 369
323 once->cb (once->fd, revents, once->arg); 370 once->cb (once->fd, (short)revents, once->arg);
324 free (once); 371 free (once);
325} 372}
326 373
327int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 374int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
328{ 375{
329 struct x_once *once = malloc (sizeof (struct x_once)); 376 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
377 dLOOPbase;
330 378
331 if (!once) 379 if (!once)
332 return -1; 380 return -1;
333 381
334 once->fd = fd; 382 once->fd = fd;
335 once->cb = cb; 383 once->cb = cb;
336 once->arg = arg; 384 once->arg = arg;
337 385
338 ev_once (fd, events & (EV_READ|EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 386 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
339 387
340 return 0; 388 return 0;
341} 389}
342 390
343int event_base_priority_init (struct event_base *base, int npri) 391int event_base_priority_init (struct event_base *base, int npri)
344{ 392{
345 return 0; 393 /*dLOOPbase;*/
346}
347 394
395 return 0;
396}
397

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines