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Comparing libev/event.c (file contents):
Revision 1.7 by root, Sat Nov 3 21:58:51 2007 UTC vs.
Revision 1.42 by root, Mon May 10 20:01:45 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 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
38#define dLOOPev 54# define dLOOPev
39#define dLOOPbase 55# define dLOOPbase
56#endif
40 57
58/* never accessed, will always be cast from/to ev_loop */
41struct event_base 59struct event_base
42{ 60{
43 int dummy; 61 int dummy;
44}; 62};
45 63
46static struct event_base x_base, *x_cur; 64static struct event_base *ev_x_cur;
47 65
48static void 66static void
49tv_set (struct timeval *tv, ev_tstamp at) 67ev_tv_set (struct timeval *tv, ev_tstamp at)
50{ 68{
51 tv->tv_sec = (long)at; 69 tv->tv_sec = (long)at;
52 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); 70 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
53} 71}
54 72
55static ev_tstamp 73static ev_tstamp
56tv_get (struct timeval *tv) 74ev_tv_get (struct timeval *tv)
57{ 75{
58 if (tv) 76 if (tv)
77 {
59 return tv->tv_sec + tv->tv_usec * 1e-6; 78 ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
79 return after ? after : 1e-6;
80 }
60 else 81 else
61 return -1.; 82 return -1.;
62} 83}
63 84
64#define EVENT_VERSION(a,b) # a "." # b 85#define EVENT_STRINGIFY(s) # s
86#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
65 87
66const char *event_get_version (void) 88const char *event_get_version (void)
67{ 89{
90 /* returns ABI, not API or library, version */
68 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 91 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
69} 92}
70 93
71const char *event_get_method (void) 94const char *event_get_method (void)
72{ 95{
73 return "libev"; 96 return "libev";
74} 97}
75 98
76void *event_init (void) 99void *event_init (void)
77{ 100{
78 if (!x_cur && ev_init (0)) 101#if EV_MULTIPLICITY
79 return x_cur = &x_base; 102 if (ev_x_cur)
103 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
104 else
105 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
106#else
107 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
80 108
81 return 0; 109 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
110#endif
111
112 return ev_x_cur;
82} 113}
83 114
84void event_base_free (struct event_base *base) 115void event_base_free (struct event_base *base)
85{ 116{
86 /* nop */ 117 dLOOPbase;
118
119#if EV_MULTIPLICITY
120 if (ev_default_loop (EVFLAG_AUTO) != loop)
121 ev_loop_destroy (loop);
122#endif
87} 123}
88 124
89int event_dispatch (void) 125int event_dispatch (void)
90{ 126{
91 return event_base_dispatch (x_cur); 127 return event_base_dispatch (ev_x_cur);
92} 128}
93 129
94#ifdef EV_STANDALONE 130#ifdef EV_STANDALONE
95void event_set_log_callback (event_log_cb cb) 131void event_set_log_callback (event_log_cb cb)
96{ 132{
… …
98} 134}
99#endif 135#endif
100 136
101int event_loop (int flags) 137int event_loop (int flags)
102{ 138{
103 return event_base_loop (x_cur, flags); 139 return event_base_loop (ev_x_cur, flags);
104} 140}
105 141
106int event_loopexit (struct timeval *tv) 142int event_loopexit (struct timeval *tv)
107{ 143{
108 return event_base_loopexit (x_cur, tv); 144 return event_base_loopexit (ev_x_cur, tv);
109} 145}
110 146
111static void 147static void
112x_cb (struct event *ev, int revents) 148ev_x_cb (struct event *ev, int revents)
113{ 149{
114 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 150 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
115 151
116 ev->ev_res = revents; 152 ev->ev_res = revents;
117 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 153 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
118} 154}
119 155
120static void 156static void
121x_cb_sig (EV_P_ struct ev_signal *w, int revents) 157ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
122{ 158{
123 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); 159 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
124}
125 160
161 if (revents & EV_ERROR)
162 event_del (ev);
163
164 ev_x_cb (ev, revents);
165}
166
126static void 167static void
127x_cb_io (EV_P_ struct ev_io *w, int revents) 168ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
128{ 169{
129 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 170 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
130 171
131 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 172 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
132 ev_io_stop (w); 173 event_del (ev);
133 174
134 x_cb (ev, revents); 175 ev_x_cb (ev, revents);
135} 176}
136 177
137static void 178static void
138x_cb_to (EV_P_ struct ev_timer *w, int revents) 179ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
139{ 180{
140 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents); 181 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
182
183 event_del (ev);
184
185 ev_x_cb (ev, revents);
141} 186}
142 187
143void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 188void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
144{ 189{
145 if (events & EV_SIGNAL) 190 if (events & EV_SIGNAL)
146 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 191 ev_init (&ev->iosig.sig, ev_x_cb_sig);
147 else 192 else
148 ev_watcher_init (&ev->iosig.io, x_cb_io); 193 ev_init (&ev->iosig.io, ev_x_cb_io);
149 194
150 ev_watcher_init (&ev->to, x_cb_to); 195 ev_init (&ev->to, ev_x_cb_to);
151 196
152 ev->ev_base = x_cur; 197 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
153 ev->ev_fd = fd; 198 ev->ev_fd = fd;
154 ev->ev_events = events; 199 ev->ev_events = events;
155 ev->ev_pri = 0; 200 ev->ev_pri = 0;
156 ev->ev_callback = cb; 201 ev->ev_callback = cb;
157 ev->ev_arg = arg; 202 ev->ev_arg = arg;
158 ev->ev_res = 0; 203 ev->ev_res = 0;
204 ev->ev_flags = EVLIST_INIT;
159} 205}
160 206
161int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 207int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
162{ 208{
163 return event_base_once (x_cur, fd, events, cb, arg, tv); 209 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
164} 210}
165 211
166int event_add (struct event *ev, struct timeval *tv) 212int event_add (struct event *ev, struct timeval *tv)
167{ 213{
168 dLOOPev; 214 dLOOPev;
169 215
170 /* disable all watchers */
171 event_del (ev);
172
173 if (ev->ev_events & EV_SIGNAL) 216 if (ev->ev_events & EV_SIGNAL)
174 { 217 {
218 if (!ev_is_active (&ev->iosig.sig))
219 {
175 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 220 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
176 ev_signal_start (EV_A_ &ev->iosig.sig); 221 ev_signal_start (EV_A_ &ev->iosig.sig);
222
223 ev->ev_flags |= EVLIST_SIGNAL;
224 }
177 } 225 }
178 else if (ev->ev_events & (EV_READ | EV_WRITE)) 226 else if (ev->ev_events & (EV_READ | EV_WRITE))
179 { 227 {
228 if (!ev_is_active (&ev->iosig.io))
229 {
180 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 230 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
181 ev_io_start (EV_A_ &ev->iosig.io); 231 ev_io_start (EV_A_ &ev->iosig.io);
232
233 ev->ev_flags |= EVLIST_INSERTED;
234 }
182 } 235 }
183 236
184 if (tv) 237 if (tv)
185 { 238 {
186 ev_timer_set (&ev->to, tv_get (tv), 0.); 239 ev->to.repeat = ev_tv_get (tv);
240 ev_timer_again (EV_A_ &ev->to);
241 ev->ev_flags |= EVLIST_TIMEOUT;
242 }
243 else
244 {
187 ev_timer_start (EV_A_ &ev->to); 245 ev_timer_stop (EV_A_ &ev->to);
246 ev->ev_flags &= ~EVLIST_TIMEOUT;
188 } 247 }
248
249 ev->ev_flags |= EVLIST_ACTIVE;
189 250
190 return 0; 251 return 0;
191} 252}
192 253
193int event_del (struct event *ev) 254int event_del (struct event *ev)
194{ 255{
195 dLOOPev; 256 dLOOPev;
196 257
197 if (ev->ev_events & EV_SIGNAL) 258 if (ev->ev_events & EV_SIGNAL)
198 {
199 /* sig */
200 if (ev_is_active (&ev->iosig.sig))
201 ev_signal_stop (EV_A_ &ev->iosig.sig); 259 ev_signal_stop (EV_A_ &ev->iosig.sig);
202 } 260 else if (ev->ev_events & (EV_READ | EV_WRITE))
203 else
204 {
205 /* io */
206 if (ev_is_active (&ev->iosig.io))
207 ev_io_stop (EV_A_ &ev->iosig.io); 261 ev_io_stop (EV_A_ &ev->iosig.io);
208 }
209 262
210 if (ev_is_active (&ev->to)) 263 if (ev_is_active (&ev->to))
211 ev_timer_stop (EV_A_ &ev->to); 264 ev_timer_stop (EV_A_ &ev->to);
212 265
266 ev->ev_flags = EVLIST_INIT;
267
213 return 0; 268 return 0;
269}
270
271void event_active (struct event *ev, int res, short ncalls)
272{
273 dLOOPev;
274
275 if (res & EV_TIMEOUT)
276 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
277
278 if (res & EV_SIGNAL)
279 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
280
281 if (res & (EV_READ | EV_WRITE))
282 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
214} 283}
215 284
216int event_pending (struct event *ev, short events, struct timeval *tv) 285int event_pending (struct event *ev, short events, struct timeval *tv)
217{ 286{
287 short revents = 0;
218 dLOOPev; 288 dLOOPev;
219 289
220 short revents = 0;
221
222 if (ev->ev_events & EV_SIGNAL) 290 if (ev->ev_events & EV_SIGNAL)
223 { 291 {
224 /* sig */ 292 /* sig */
225 if (ev->iosig.sig.pending) 293 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
226 revents |= EV_SIGNAL; 294 revents |= EV_SIGNAL;
227 } 295 }
228 else 296 else if (ev->ev_events & (EV_READ | EV_WRITE))
229 { 297 {
230 /* io */ 298 /* io */
231 if (ev->iosig.io.pending) 299 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
232 revents |= ev->ev_events & (EV_READ | EV_WRITE); 300 revents |= ev->ev_events & (EV_READ | EV_WRITE);
233 } 301 }
234 302
235 if (ev->to.pending) 303 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
236 { 304 {
237 revents |= EV_TIMEOUT; 305 revents |= EV_TIMEOUT;
238 306
239 if (tv) 307 if (tv)
240 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 308 ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
241 } 309 }
242 310
243 return events & revents; 311 return events & revents;
244} 312}
245 313
246int event_priority_init (int npri) 314int event_priority_init (int npri)
247{ 315{
248 return event_base_priority_init (x_cur, npri); 316 return event_base_priority_init (ev_x_cur, npri);
249} 317}
250 318
251int event_priority_set (struct event *ev, int pri) 319int event_priority_set (struct event *ev, int pri)
252{ 320{
253 ev->ev_pri = pri; 321 ev->ev_pri = pri;
… …
263} 331}
264 332
265int event_base_loop (struct event_base *base, int flags) 333int event_base_loop (struct event_base *base, int flags)
266{ 334{
267 dLOOPbase; 335 dLOOPbase;
268 ev_loop (EV_A_ flags | EVLOOP_ONESHOT); 336
337 ev_loop (EV_A_ flags);
269 338
270 return 0; 339 return 0;
271} 340}
272 341
273int event_base_dispatch (struct event_base *base) 342int event_base_dispatch (struct event_base *base)
274{ 343{
275 return event_base_loop (base, 0); 344 return event_base_loop (base, 0);
276} 345}
277 346
278static void 347static void
279x_loopexit_cb (EV_P_ int revents, void *arg) 348ev_x_loopexit_cb (int revents, void *base)
280{ 349{
350 dLOOPbase;
351
281 ev_unloop (EV_A_ 2); 352 ev_unloop (EV_A_ EVUNLOOP_ONE);
282} 353}
283 354
284int event_base_loopexit (struct event_base *base, struct timeval *tv) 355int event_base_loopexit (struct event_base *base, struct timeval *tv)
285{ 356{
357 ev_tstamp after = ev_tv_get (tv);
286 dLOOPbase; 358 dLOOPbase;
287 ev_tstamp after = tv_get (tv);
288 359
289 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 360 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
290 361
291 return -1; 362 return 0;
292} 363}
293 364
294struct x_once 365struct ev_x_once
295{ 366{
296 int fd; 367 int fd;
297 void (*cb)(int, short, void *); 368 void (*cb)(int, short, void *);
298 void *arg; 369 void *arg;
299}; 370};
300 371
301static void 372static void
302x_once_cb (int revents, void *arg) 373ev_x_once_cb (int revents, void *arg)
303{ 374{
304 struct x_once *once = arg; 375 struct ev_x_once *once = (struct ev_x_once *)arg;
305 376
306 once->cb (once->fd, revents, once->arg); 377 once->cb (once->fd, (short)revents, once->arg);
307 free (once); 378 free (once);
308} 379}
309 380
310int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 381int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
311{ 382{
383 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
312 dLOOPbase; 384 dLOOPbase;
313 struct x_once *once = malloc (sizeof (struct x_once));
314 385
315 if (!once) 386 if (!once)
316 return -1; 387 return -1;
317 388
318 once->fd = fd; 389 once->fd = fd;
319 once->cb = cb; 390 once->cb = cb;
320 once->arg = arg; 391 once->arg = arg;
321 392
322 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 393 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
323 394
324 return 0; 395 return 0;
325} 396}
326 397
327int event_base_priority_init (struct event_base *base, int npri) 398int event_base_priority_init (struct event_base *base, int npri)
328{ 399{
329 dLOOPbase; 400 /*dLOOPbase;*/
330 401
331 return 0; 402 return 0;
332} 403}
333 404

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