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Comparing libev/event.c (file contents):
Revision 1.3 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.41 by root, Wed Jan 7 20:45:52 2009 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
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 65
47static void 66static void
48tv_set (struct timeval *tv, ev_tstamp at) 67ev_tv_set (struct timeval *tv, ev_tstamp at)
49{ 68{
50 tv->tv_sec = (long)at; 69 tv->tv_sec = (long)at;
51 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); 70 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
52} 71}
53 72
54static ev_tstamp 73static ev_tstamp
55tv_get (struct timeval *tv) 74ev_tv_get (struct timeval *tv)
56{ 75{
57 if (tv) 76 if (tv)
58 return tv->tv_sec + tv->tv_usec * 1e-6; 77 return tv->tv_sec + tv->tv_usec * 1e-6;
59 else 78 else
60 return -1.; 79 return -1.;
61} 80}
62 81
63#define EVENT_VERSION(a,b) # a "." # b 82#define EVENT_STRINGIFY(s) # s
83#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
64 84
65const char *event_get_version (void) 85const char *event_get_version (void)
66{ 86{
87 /* returns ABI, not API or library, version */
67 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 88 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
68} 89}
69 90
70const char *event_get_method (void) 91const char *event_get_method (void)
71{ 92{
72 return "libev"; 93 return "libev";
73} 94}
74 95
75void *event_init (void) 96void *event_init (void)
76{ 97{
77 if (ev_init (0)) 98#if EV_MULTIPLICITY
78 return x_cur = &x_base; 99 if (ev_x_cur)
100 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
101 else
102 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
103#else
104 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
79 105
80 return 0; 106 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
107#endif
108
109 return ev_x_cur;
81} 110}
82 111
83void event_base_free (struct event_base *base) 112void event_base_free (struct event_base *base)
84{ 113{
114 dLOOPbase;
115
116#if EV_MULTIPLICITY
117 if (ev_default_loop (EVFLAG_AUTO) != loop)
118 ev_loop_destroy (loop);
119#endif
120}
121
122int event_dispatch (void)
123{
124 return event_base_dispatch (ev_x_cur);
125}
126
127#ifdef EV_STANDALONE
128void event_set_log_callback (event_log_cb cb)
129{
85 /* nop */ 130 /* nop */
86} 131}
87 132#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}
97 133
98int event_loop (int flags) 134int event_loop (int flags)
99{ 135{
100 return event_base_loop (x_cur, flags); 136 return event_base_loop (ev_x_cur, flags);
101} 137}
102 138
103int event_loopexit (struct timeval *tv) 139int event_loopexit (struct timeval *tv)
104{ 140{
105 event_base_loopexit (x_cur, tv); 141 return event_base_loopexit (ev_x_cur, tv);
106} 142}
107 143
108static void 144static void
109x_cb (struct event *ev, int revents) 145ev_x_cb (struct event *ev, int revents)
110{ 146{
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; 147 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
124 148
125 if (revents & EV_TIMEOUT)
126 --x_actives;
127
128 ev->ev_res = revents; 149 ev->ev_res = revents;
129 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 150 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
130} 151}
131 152
132static void 153static 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) 154ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
146{ 155{
156 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
157
158 if (revents & EV_ERROR)
159 event_del (ev);
160
161 ev_x_cb (ev, revents);
162}
163
164static void
165ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
166{
147 x_cb ((struct event *)(((char *)w) - offsetof (struct event, sig)), revents); 167 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
168
169 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
170 event_del (ev);
171
172 ev_x_cb (ev, revents);
173}
174
175static void
176ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
177{
178 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
179
180 event_del (ev);
181
182 ev_x_cb (ev, revents);
148} 183}
149 184
150void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 185void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
151{ 186{
187 if (events & EV_SIGNAL)
188 ev_init (&ev->iosig.sig, ev_x_cb_sig);
189 else
152 ev_watcher_init (&ev->io, x_cb_io); 190 ev_init (&ev->iosig.io, ev_x_cb_io);
191
153 ev_watcher_init (&ev->to, x_cb_to); 192 ev_init (&ev->to, ev_x_cb_to);
154 ev_watcher_init (&ev->sig, x_cb_sig);
155 193
156 ev->ev_base = x_cur; 194 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
157 ev->ev_fd = fd; 195 ev->ev_fd = fd;
158 ev->ev_events = events; 196 ev->ev_events = events;
159 ev->ev_pri = 0; 197 ev->ev_pri = 0;
160 ev->ev_callback = cb; 198 ev->ev_callback = cb;
161 ev->ev_arg = arg; 199 ev->ev_arg = arg;
162 ev->ev_res = 0; 200 ev->ev_res = 0;
201 ev->ev_flags = EVLIST_INIT;
163} 202}
164 203
165int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 204int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
166{ 205{
167 event_base_once (x_cur, fd, events, cb, arg, tv); 206 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
168} 207}
169 208
170int event_add (struct event *ev, struct timeval *tv) 209int event_add (struct event *ev, struct timeval *tv)
171{ 210{
211 dLOOPev;
212
213 if (ev->ev_events & EV_SIGNAL)
214 {
215 if (!ev_is_active (&ev->iosig.sig))
216 {
217 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
218 ev_signal_start (EV_A_ &ev->iosig.sig);
219
220 ev->ev_flags |= EVLIST_SIGNAL;
221 }
222 }
223 else if (ev->ev_events & (EV_READ | EV_WRITE))
224 {
225 if (!ev_is_active (&ev->iosig.io))
226 {
227 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
228 ev_io_start (EV_A_ &ev->iosig.io);
229
230 ev->ev_flags |= EVLIST_INSERTED;
231 }
232 }
233
172 if (tv) 234 if (tv)
173 { 235 {
174 if (ev_is_active (&ev->to)) 236 ev->to.repeat = ev_tv_get (tv);
175 { 237 ev_timer_again (EV_A_ &ev->to);
238 ev->ev_flags |= EVLIST_TIMEOUT;
239 }
240 else
241 {
176 ev_timer_stop (&ev->to); 242 ev_timer_stop (EV_A_ &ev->to);
177 --x_actives; 243 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 { 244 }
187 if (ev_is_active (&ev->io))
188 {
189 ev_io_stop (&ev->io);
190 --x_actives;
191 }
192 245
193 ev_io_set (&ev->io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 246 ev->ev_flags |= EVLIST_ACTIVE;
194 ev_io_start (&ev->io); 247
195 ++x_actives; 248 return 0;
196 } 249}
250
251int event_del (struct event *ev)
252{
253 dLOOPev;
197 254
198 if (ev->ev_events & EV_SIGNAL) 255 if (ev->ev_events & EV_SIGNAL)
199 {
200 if (ev_is_active (&ev->sig))
201 {
202 ev_signal_stop (&ev->sig); 256 ev_signal_stop (EV_A_ &ev->iosig.sig);
203 --x_actives; 257 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); 258 ev_io_stop (EV_A_ &ev->iosig.io);
219 --x_actives;
220 }
221 259
222 if (ev_is_active (&ev->to)) 260 if (ev_is_active (&ev->to))
223 {
224 ev_timer_stop (&ev->to); 261 ev_timer_stop (EV_A_ &ev->to);
225 --x_actives;
226 }
227 262
228 if (ev_is_active (&ev->sig)) 263 ev->ev_flags = EVLIST_INIT;
229 {
230 ev_signal_stop (&ev->sig);
231 --x_actives;
232 }
233 264
234 return 0; 265 return 0;
266}
267
268void event_active (struct event *ev, int res, short ncalls)
269{
270 dLOOPev;
271
272 if (res & EV_TIMEOUT)
273 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
274
275 if (res & EV_SIGNAL)
276 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
277
278 if (res & (EV_READ | EV_WRITE))
279 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
235} 280}
236 281
237int event_pending (struct event *ev, short events, struct timeval *tv) 282int event_pending (struct event *ev, short events, struct timeval *tv)
238{ 283{
239 short revents; 284 short revents = 0;
285 dLOOPev;
240 286
241 if (ev->io.pending) 287 if (ev->ev_events & EV_SIGNAL)
288 {
289 /* sig */
290 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
291 revents |= EV_SIGNAL;
292 }
293 else if (ev->ev_events & (EV_READ | EV_WRITE))
294 {
295 /* io */
296 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
242 revents |= ev->ev_events & (EV_READ | EV_WRITE); 297 revents |= ev->ev_events & (EV_READ | EV_WRITE);
298 }
243 299
244 if (ev->to.pending) 300 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
245 { 301 {
246 revents |= EV_TIMEOUT; 302 revents |= EV_TIMEOUT;
247 303
248 if (tv) 304 if (tv)
249 tv_set (tv, ev_now); /* not sure if this is right :) */ 305 ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
250 } 306 }
251
252 if (ev->sig.pending)
253 revents |= EV_SIGNAL;
254 307
255 return events & revents; 308 return events & revents;
256} 309}
257 310
258int event_priority_init (int npri) 311int event_priority_init (int npri)
259{ 312{
260 return event_base_priority_init (x_cur, npri); 313 return event_base_priority_init (ev_x_cur, npri);
261} 314}
262 315
263int event_priority_set (struct event *ev, int pri) 316int event_priority_set (struct event *ev, int pri)
264{ 317{
265 ev->ev_pri = pri; 318 ev->ev_pri = pri;
… …
274 return 0; 327 return 0;
275} 328}
276 329
277int event_base_loop (struct event_base *base, int flags) 330int event_base_loop (struct event_base *base, int flags)
278{ 331{
279 do 332 dLOOPbase;
280 { 333
281 ev_loop (flags | EVLOOP_ONESHOT); 334 ev_loop (EV_A_ flags);
282 }
283 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
284 335
285 return 0; 336 return 0;
286} 337}
287 338
288int event_base_dispatch (struct event_base *base) 339int event_base_dispatch (struct event_base *base)
289{ 340{
290 return event_base_loop (base, 0); 341 return event_base_loop (base, 0);
291} 342}
292 343
293static void 344static void
294x_loopexit_cb (int revents, void *arg) 345ev_x_loopexit_cb (int revents, void *base)
295{ 346{
296 ev_loop_done = 2; 347 dLOOPbase;
348
349 ev_unloop (EV_A_ EVUNLOOP_ONE);
297} 350}
298 351
299int event_base_loopexit (struct event_base *base, struct timeval *tv) 352int event_base_loopexit (struct event_base *base, struct timeval *tv)
300{ 353{
301 ev_tstamp after = tv_get (tv); 354 ev_tstamp after = ev_tv_get (tv);
355 dLOOPbase;
302 356
303 ev_once (-1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 357 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
304}
305 358
359 return 0;
360}
361
306struct x_once 362struct ev_x_once
307{ 363{
308 int fd; 364 int fd;
309 void (*cb)(int, short, void *); 365 void (*cb)(int, short, void *);
310 void *arg; 366 void *arg;
311}; 367};
312 368
313static void 369static void
314x_once_cb (int revents, void *arg) 370ev_x_once_cb (int revents, void *arg)
315{ 371{
316 struct x_once *once = arg; 372 struct ev_x_once *once = (struct ev_x_once *)arg;
317 373
318 once->cb (once->fd, revents, once->arg); 374 once->cb (once->fd, (short)revents, once->arg);
319 free (once); 375 free (once);
320} 376}
321 377
322int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 378int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
323{ 379{
324 struct x_once *once = malloc (sizeof (struct x_once)); 380 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
381 dLOOPbase;
325 382
326 if (!once) 383 if (!once)
327 return -1; 384 return -1;
328 385
329 once->fd = fd; 386 once->fd = fd;
330 once->cb = cb; 387 once->cb = cb;
331 once->arg = arg; 388 once->arg = arg;
332 389
333 ev_once (fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 390 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
334 391
335 return 0; 392 return 0;
336} 393}
337 394
338int event_base_priority_init (struct event_base *base, int npri) 395int event_base_priority_init (struct event_base *base, int npri)
339{ 396{
340 return 0; 397 /*dLOOPbase;*/
341}
342 398
399 return 0;
400}
401

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