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Comparing libev/event.c (file contents):
Revision 1.16 by root, Sun Nov 4 22:03:17 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>
35#include <assert.h> 42#include <assert.h>
36 43
37#include "ev.h" 44#ifdef EV_EVENT_H
45# include EV_EVENT_H
46#else
38#include "event.h" 47# include "event.h"
48#endif
39 49
40#if EV_MULTIPLICITY 50#if EV_MULTIPLICITY
41# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base 51# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
42# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base 52# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
43#else 53#else
… …
49struct event_base 59struct event_base
50{ 60{
51 int dummy; 61 int dummy;
52}; 62};
53 63
54static struct event_base *x_cur; 64static struct event_base *ev_x_cur;
55 65
56static void 66static void
57tv_set (struct timeval *tv, ev_tstamp at) 67ev_tv_set (struct timeval *tv, ev_tstamp at)
58{ 68{
59 tv->tv_sec = (long)at; 69 tv->tv_sec = (long)at;
60 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); 70 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
61} 71}
62 72
63static ev_tstamp 73static ev_tstamp
64tv_get (struct timeval *tv) 74ev_tv_get (struct timeval *tv)
65{ 75{
66 if (tv) 76 if (tv)
77 {
67 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 }
68 else 81 else
69 return -1.; 82 return -1.;
70} 83}
71 84
72#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)
73 87
74const char *event_get_version (void) 88const char *event_get_version (void)
75{ 89{
90 /* returns ABI, not API or library, version */
76 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 91 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
77} 92}
78 93
79const char *event_get_method (void) 94const char *event_get_method (void)
80{ 95{
… …
82} 97}
83 98
84void *event_init (void) 99void *event_init (void)
85{ 100{
86#if EV_MULTIPLICITY 101#if EV_MULTIPLICITY
87 if (x_cur) 102 if (ev_x_cur)
88 x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO); 103 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
89 else 104 else
90 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 105 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
91#else 106#else
92 assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur)); 107 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
93 108
94 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 109 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
95#endif 110#endif
96 111
97 return x_cur; 112 return ev_x_cur;
98} 113}
99 114
100void event_base_free (struct event_base *base) 115void event_base_free (struct event_base *base)
101{ 116{
102 dLOOPbase; 117 dLOOPbase;
103 118
104#if EV_MULTIPLICITY 119#if EV_MULTIPLICITY
105 if (ev_default_loop (EVMETHOD_AUTO) != loop) 120 if (ev_default_loop (EVFLAG_AUTO) != loop)
106 ev_loop_destroy (loop); 121 ev_loop_destroy (loop);
107#endif 122#endif
108} 123}
109 124
110int event_dispatch (void) 125int event_dispatch (void)
111{ 126{
112 return event_base_dispatch (x_cur); 127 return event_base_dispatch (ev_x_cur);
113} 128}
114 129
115#ifdef EV_STANDALONE 130#ifdef EV_STANDALONE
116void event_set_log_callback (event_log_cb cb) 131void event_set_log_callback (event_log_cb cb)
117{ 132{
… …
119} 134}
120#endif 135#endif
121 136
122int event_loop (int flags) 137int event_loop (int flags)
123{ 138{
124 return event_base_loop (x_cur, flags); 139 return event_base_loop (ev_x_cur, flags);
125} 140}
126 141
127int event_loopexit (struct timeval *tv) 142int event_loopexit (struct timeval *tv)
128{ 143{
129 return event_base_loopexit (x_cur, tv); 144 return event_base_loopexit (ev_x_cur, tv);
130} 145}
131 146
132static void 147static void
133x_cb (struct event *ev, int revents) 148ev_x_cb (struct event *ev, int revents)
134{ 149{
135 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 150 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
136 151
137 ev->ev_res = revents; 152 ev->ev_res = revents;
138 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 153 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
139} 154}
140 155
141static void 156static void
142x_cb_sig (EV_P_ struct ev_signal *w, int revents) 157ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
143{ 158{
144 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));
145}
146 160
161 if (revents & EV_ERROR)
162 event_del (ev);
163
164 ev_x_cb (ev, revents);
165}
166
147static void 167static void
148x_cb_io (EV_P_ struct ev_io *w, int revents) 168ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
149{ 169{
150 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));
151 171
152 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 172 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
153 ev_io_stop (EV_A_ w); 173 event_del (ev);
154 174
155 x_cb (ev, revents); 175 ev_x_cb (ev, revents);
156} 176}
157 177
158static void 178static void
159x_cb_to (EV_P_ struct ev_timer *w, int revents) 179ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
160{ 180{
161 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 181 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
162 182
163 event_del (ev); 183 event_del (ev);
164 184
165 x_cb (ev, revents); 185 ev_x_cb (ev, revents);
166} 186}
167 187
168void 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)
169{ 189{
170 if (events & EV_SIGNAL) 190 if (events & EV_SIGNAL)
171 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 191 ev_init (&ev->iosig.sig, ev_x_cb_sig);
172 else 192 else
173 ev_watcher_init (&ev->iosig.io, x_cb_io); 193 ev_init (&ev->iosig.io, ev_x_cb_io);
174 194
175 ev_watcher_init (&ev->to, x_cb_to); 195 ev_init (&ev->to, ev_x_cb_to);
176 196
177 ev->ev_base = x_cur; /* not threadsafe, but its like libevent works */ 197 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
178 ev->ev_fd = fd; 198 ev->ev_fd = fd;
179 ev->ev_events = events; 199 ev->ev_events = events;
180 ev->ev_pri = 0; 200 ev->ev_pri = 0;
181 ev->ev_callback = cb; 201 ev->ev_callback = cb;
182 ev->ev_arg = arg; 202 ev->ev_arg = arg;
183 ev->ev_res = 0; 203 ev->ev_res = 0;
204 ev->ev_flags = EVLIST_INIT;
184} 205}
185 206
186int 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)
187{ 208{
188 return event_base_once (x_cur, fd, events, cb, arg, tv); 209 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
189} 210}
190 211
191int event_add (struct event *ev, struct timeval *tv) 212int event_add (struct event *ev, struct timeval *tv)
192{ 213{
193 dLOOPev; 214 dLOOPev;
194 215
195 /* disable all watchers */
196 event_del (ev);
197
198 if (ev->ev_events & EV_SIGNAL) 216 if (ev->ev_events & EV_SIGNAL)
199 { 217 {
218 if (!ev_is_active (&ev->iosig.sig))
219 {
200 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 220 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
201 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 }
202 } 225 }
203 else if (ev->ev_events & (EV_READ | EV_WRITE)) 226 else if (ev->ev_events & (EV_READ | EV_WRITE))
204 { 227 {
228 if (!ev_is_active (&ev->iosig.io))
229 {
205 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));
206 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 }
207 } 235 }
208 236
209 if (tv) 237 if (tv)
210 { 238 {
211 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 {
212 ev_timer_start (EV_A_ &ev->to); 245 ev_timer_stop (EV_A_ &ev->to);
246 ev->ev_flags &= ~EVLIST_TIMEOUT;
213 } 247 }
248
249 ev->ev_flags |= EVLIST_ACTIVE;
214 250
215 return 0; 251 return 0;
216} 252}
217 253
218int event_del (struct event *ev) 254int event_del (struct event *ev)
219{ 255{
220 dLOOPev; 256 dLOOPev;
221 257
222 if (ev->ev_events & EV_SIGNAL) 258 if (ev->ev_events & EV_SIGNAL)
223 {
224 /* sig */
225 if (ev_is_active (&ev->iosig.sig))
226 ev_signal_stop (EV_A_ &ev->iosig.sig); 259 ev_signal_stop (EV_A_ &ev->iosig.sig);
227 }
228 else if (ev->ev_events & (EV_READ | EV_WRITE)) 260 else if (ev->ev_events & (EV_READ | EV_WRITE))
229 {
230 /* io */
231 if (ev_is_active (&ev->iosig.io))
232 ev_io_stop (EV_A_ &ev->iosig.io); 261 ev_io_stop (EV_A_ &ev->iosig.io);
233 }
234 262
235 if (ev_is_active (&ev->to)) 263 if (ev_is_active (&ev->to))
236 ev_timer_stop (EV_A_ &ev->to); 264 ev_timer_stop (EV_A_ &ev->to);
237 265
266 ev->ev_flags = EVLIST_INIT;
267
238 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));
239} 283}
240 284
241int event_pending (struct event *ev, short events, struct timeval *tv) 285int event_pending (struct event *ev, short events, struct timeval *tv)
242{ 286{
287 short revents = 0;
243 dLOOPev; 288 dLOOPev;
244
245 short revents = 0;
246 289
247 if (ev->ev_events & EV_SIGNAL) 290 if (ev->ev_events & EV_SIGNAL)
248 { 291 {
249 /* sig */ 292 /* sig */
250 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) 293 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
… …
260 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) 303 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
261 { 304 {
262 revents |= EV_TIMEOUT; 305 revents |= EV_TIMEOUT;
263 306
264 if (tv) 307 if (tv)
265 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 :) */
266 } 309 }
267 310
268 return events & revents; 311 return events & revents;
269} 312}
270 313
271int event_priority_init (int npri) 314int event_priority_init (int npri)
272{ 315{
273 return event_base_priority_init (x_cur, npri); 316 return event_base_priority_init (ev_x_cur, npri);
274} 317}
275 318
276int event_priority_set (struct event *ev, int pri) 319int event_priority_set (struct event *ev, int pri)
277{ 320{
278 ev->ev_pri = pri; 321 ev->ev_pri = pri;
… …
300{ 343{
301 return event_base_loop (base, 0); 344 return event_base_loop (base, 0);
302} 345}
303 346
304static void 347static void
305x_loopexit_cb (int revents, void *base) 348ev_x_loopexit_cb (int revents, void *base)
306{ 349{
307 dLOOPbase; 350 dLOOPbase;
308 351
309 ev_unloop (EV_A_ EVUNLOOP_ONCE); 352 ev_unloop (EV_A_ EVUNLOOP_ONE);
310} 353}
311 354
312int event_base_loopexit (struct event_base *base, struct timeval *tv) 355int event_base_loopexit (struct event_base *base, struct timeval *tv)
313{ 356{
357 ev_tstamp after = ev_tv_get (tv);
314 dLOOPbase; 358 dLOOPbase;
315 ev_tstamp after = tv_get (tv);
316 359
317 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);
318 361
319 return -1; 362 return 0;
320} 363}
321 364
322struct x_once 365struct ev_x_once
323{ 366{
324 int fd; 367 int fd;
325 void (*cb)(int, short, void *); 368 void (*cb)(int, short, void *);
326 void *arg; 369 void *arg;
327}; 370};
328 371
329static void 372static void
330x_once_cb (int revents, void *arg) 373ev_x_once_cb (int revents, void *arg)
331{ 374{
332 struct x_once *once = arg; 375 struct ev_x_once *once = (struct ev_x_once *)arg;
333 376
334 once->cb (once->fd, revents, once->arg); 377 once->cb (once->fd, (short)revents, once->arg);
335 free (once); 378 free (once);
336} 379}
337 380
338int 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)
339{ 382{
383 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
340 dLOOPbase; 384 dLOOPbase;
341 struct x_once *once = malloc (sizeof (struct x_once));
342 385
343 if (!once) 386 if (!once)
344 return -1; 387 return -1;
345 388
346 once->fd = fd; 389 once->fd = fd;
347 once->cb = cb; 390 once->cb = cb;
348 once->arg = arg; 391 once->arg = arg;
349 392
350 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);
351 394
352 return 0; 395 return 0;
353} 396}
354 397
355int event_base_priority_init (struct event_base *base, int npri) 398int event_base_priority_init (struct event_base *base, int npri)

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