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Comparing libev/event.c (file contents):
Revision 1.28 by root, Mon Nov 12 08:00:05 2007 UTC vs.
Revision 1.39 by root, Tue Jan 6 19:46:56 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 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 <assert.h> 42#include <assert.h>
35
36#ifndef WIN32
37# include <sys/time.h>
38#endif
39 43
40#ifdef EV_EVENT_H 44#ifdef EV_EVENT_H
41# include EV_EVENT_H 45# include EV_EVENT_H
42#else 46#else
43# include "event.h" 47# include "event.h"
… …
55struct event_base 59struct event_base
56{ 60{
57 int dummy; 61 int dummy;
58}; 62};
59 63
60static struct event_base *x_cur; 64static struct event_base *ev_x_cur;
61 65
62static void 66static void
63tv_set (struct timeval *tv, ev_tstamp at) 67ev_tv_set (struct timeval *tv, ev_tstamp at)
64{ 68{
65 tv->tv_sec = (long)at; 69 tv->tv_sec = (long)at;
66 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); 70 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
67} 71}
68 72
69static ev_tstamp 73static ev_tstamp
70tv_get (struct timeval *tv) 74ev_tv_get (struct timeval *tv)
71{ 75{
72 if (tv) 76 if (tv)
73 return tv->tv_sec + tv->tv_usec * 1e-6; 77 return tv->tv_sec + tv->tv_usec * 1e-6;
74 else 78 else
75 return -1.; 79 return -1.;
… …
88} 92}
89 93
90void *event_init (void) 94void *event_init (void)
91{ 95{
92#if EV_MULTIPLICITY 96#if EV_MULTIPLICITY
93 if (x_cur) 97 if (ev_x_cur)
94 x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO); 98 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
95 else 99 else
96 x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO); 100 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
97#else 101#else
98 assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur)); 102 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
99 103
100 x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO); 104 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
101#endif 105#endif
102 106
103 return x_cur; 107 return ev_x_cur;
104} 108}
105 109
106void event_base_free (struct event_base *base) 110void event_base_free (struct event_base *base)
107{ 111{
108 dLOOPbase; 112 dLOOPbase;
109 113
110#if EV_MULTIPLICITY 114#if EV_MULTIPLICITY
111 if (ev_default_loop (EVMETHOD_AUTO) != loop) 115 if (ev_default_loop (EVFLAG_AUTO) != loop)
112 ev_loop_destroy (loop); 116 ev_loop_destroy (loop);
113#endif 117#endif
114} 118}
115 119
116int event_dispatch (void) 120int event_dispatch (void)
117{ 121{
118 return event_base_dispatch (x_cur); 122 return event_base_dispatch (ev_x_cur);
119} 123}
120 124
121#ifdef EV_STANDALONE 125#ifdef EV_STANDALONE
122void event_set_log_callback (event_log_cb cb) 126void event_set_log_callback (event_log_cb cb)
123{ 127{
… …
125} 129}
126#endif 130#endif
127 131
128int event_loop (int flags) 132int event_loop (int flags)
129{ 133{
130 return event_base_loop (x_cur, flags); 134 return event_base_loop (ev_x_cur, flags);
131} 135}
132 136
133int event_loopexit (struct timeval *tv) 137int event_loopexit (struct timeval *tv)
134{ 138{
135 return event_base_loopexit (x_cur, tv); 139 return event_base_loopexit (ev_x_cur, tv);
136} 140}
137 141
138static void 142static void
139x_cb (struct event *ev, int revents) 143ev_x_cb (struct event *ev, int revents)
140{ 144{
141 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 145 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
142 146
143 ev->ev_res = revents; 147 ev->ev_res = revents;
144 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg); 148 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
145} 149}
146 150
147static void 151static void
148x_cb_sig (EV_P_ struct ev_signal *w, int revents) 152ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
149{ 153{
150 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig)); 154 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
151 155
152 if (revents & EV_ERROR) 156 if (revents & EV_ERROR)
153 event_del (ev); 157 event_del (ev);
154 158
155 x_cb (ev, revents); 159 ev_x_cb (ev, revents);
156} 160}
157 161
158static void 162static void
159x_cb_io (EV_P_ struct ev_io *w, int revents) 163ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
160{ 164{
161 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 165 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
162 166
163 if (revents & EV_ERROR) 167 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
164 event_del (ev); 168 event_del (ev);
165 else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
166 {
167 ev_io_stop (EV_A_ w);
168 ev->ev_flags &= ~EVLIST_INSERTED;
169 }
170 169
171 x_cb (ev, revents); 170 ev_x_cb (ev, revents);
172} 171}
173 172
174static void 173static void
175x_cb_to (EV_P_ struct ev_timer *w, int revents) 174ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
176{ 175{
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 176 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178 177
179 event_del (ev); 178 event_del (ev);
180 179
181 x_cb (ev, revents); 180 ev_x_cb (ev, revents);
182} 181}
183 182
184void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 183void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
185{ 184{
186 if (events & EV_SIGNAL) 185 if (events & EV_SIGNAL)
187 ev_init (&ev->iosig.sig, x_cb_sig); 186 ev_init (&ev->iosig.sig, ev_x_cb_sig);
188 else 187 else
189 ev_init (&ev->iosig.io, x_cb_io); 188 ev_init (&ev->iosig.io, ev_x_cb_io);
190 189
191 ev_init (&ev->to, x_cb_to); 190 ev_init (&ev->to, ev_x_cb_to);
192 191
193 ev->ev_base = x_cur; /* not threadsafe, but its like libevent works */ 192 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
194 ev->ev_fd = fd; 193 ev->ev_fd = fd;
195 ev->ev_events = events; 194 ev->ev_events = events;
196 ev->ev_pri = 0; 195 ev->ev_pri = 0;
197 ev->ev_callback = cb; 196 ev->ev_callback = cb;
198 ev->ev_arg = arg; 197 ev->ev_arg = arg;
… …
200 ev->ev_flags = EVLIST_INIT; 199 ev->ev_flags = EVLIST_INIT;
201} 200}
202 201
203int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 202int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
204{ 203{
205 return event_base_once (x_cur, fd, events, cb, arg, tv); 204 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
206} 205}
207 206
208int event_add (struct event *ev, struct timeval *tv) 207int event_add (struct event *ev, struct timeval *tv)
209{ 208{
210 dLOOPev; 209 dLOOPev;
211 210
212 /* disable all watchers */
213 event_del (ev);
214
215 if (ev->ev_events & EV_SIGNAL) 211 if (ev->ev_events & EV_SIGNAL)
216 { 212 {
213 if (!ev_is_active (&ev->iosig.sig))
214 {
217 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 215 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
218 ev_signal_start (EV_A_ &ev->iosig.sig); 216 ev_signal_start (EV_A_ &ev->iosig.sig);
219 217
220 ev->ev_flags |= EVLIST_SIGNAL; 218 ev->ev_flags |= EVLIST_SIGNAL;
219 }
221 } 220 }
222 else if (ev->ev_events & (EV_READ | EV_WRITE)) 221 else if (ev->ev_events & (EV_READ | EV_WRITE))
223 { 222 {
223 if (!ev_is_active (&ev->iosig.io))
224 {
224 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 225 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
225 ev_io_start (EV_A_ &ev->iosig.io); 226 ev_io_start (EV_A_ &ev->iosig.io);
226 227
227 ev->ev_flags |= EVLIST_INSERTED; 228 ev->ev_flags |= EVLIST_INSERTED;
229 }
228 } 230 }
229 231
230 if (tv) 232 if (tv)
231 { 233 {
232 ev_timer_set (&ev->to, tv_get (tv), 0.); 234 ev->to.repeat = ev_tv_get (tv);
233 ev_timer_start (EV_A_ &ev->to); 235 ev_timer_again (EV_A_ &ev->to);
234
235 ev->ev_flags |= EVLIST_TIMEOUT; 236 ev->ev_flags |= EVLIST_TIMEOUT;
236 } 237 }
238 else
239 {
240 ev_timer_stop (EV_A_ &ev->to);
241 ev->ev_flags &= ~EVLIST_TIMEOUT;
242 }
237 243
238 ev->ev_flags |= EVLIST_ACTIVE; 244 ev->ev_flags |= EVLIST_ACTIVE;
239 245
240 return 0; 246 return 0;
241} 247}
… …
243int event_del (struct event *ev) 249int event_del (struct event *ev)
244{ 250{
245 dLOOPev; 251 dLOOPev;
246 252
247 if (ev->ev_events & EV_SIGNAL) 253 if (ev->ev_events & EV_SIGNAL)
248 {
249 /* sig */
250 if (ev_is_active (&ev->iosig.sig))
251 ev_signal_stop (EV_A_ &ev->iosig.sig); 254 ev_signal_stop (EV_A_ &ev->iosig.sig);
252 }
253 else if (ev->ev_events & (EV_READ | EV_WRITE)) 255 else if (ev->ev_events & (EV_READ | EV_WRITE))
254 {
255 /* io */
256 if (ev_is_active (&ev->iosig.io))
257 ev_io_stop (EV_A_ &ev->iosig.io); 256 ev_io_stop (EV_A_ &ev->iosig.io);
258 }
259 257
260 if (ev_is_active (&ev->to)) 258 if (ev_is_active (&ev->to))
261 ev_timer_stop (EV_A_ &ev->to); 259 ev_timer_stop (EV_A_ &ev->to);
262 260
263 ev->ev_flags = EVLIST_INIT; 261 ev->ev_flags = EVLIST_INIT;
… …
281 279
282int event_pending (struct event *ev, short events, struct timeval *tv) 280int event_pending (struct event *ev, short events, struct timeval *tv)
283{ 281{
284 short revents = 0; 282 short revents = 0;
285 dLOOPev; 283 dLOOPev;
286
287 284
288 if (ev->ev_events & EV_SIGNAL) 285 if (ev->ev_events & EV_SIGNAL)
289 { 286 {
290 /* sig */ 287 /* sig */
291 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) 288 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
… …
301 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) 298 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
302 { 299 {
303 revents |= EV_TIMEOUT; 300 revents |= EV_TIMEOUT;
304 301
305 if (tv) 302 if (tv)
306 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 303 ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
307 } 304 }
308 305
309 return events & revents; 306 return events & revents;
310} 307}
311 308
312int event_priority_init (int npri) 309int event_priority_init (int npri)
313{ 310{
314 return event_base_priority_init (x_cur, npri); 311 return event_base_priority_init (ev_x_cur, npri);
315} 312}
316 313
317int event_priority_set (struct event *ev, int pri) 314int event_priority_set (struct event *ev, int pri)
318{ 315{
319 ev->ev_pri = pri; 316 ev->ev_pri = pri;
… …
341{ 338{
342 return event_base_loop (base, 0); 339 return event_base_loop (base, 0);
343} 340}
344 341
345static void 342static void
346x_loopexit_cb (int revents, void *base) 343ev_x_loopexit_cb (int revents, void *base)
347{ 344{
348 dLOOPbase; 345 dLOOPbase;
349 346
350 ev_unloop (EV_A_ EVUNLOOP_ONCE); 347 ev_unloop (EV_A_ EVUNLOOP_ONE);
351} 348}
352 349
353int event_base_loopexit (struct event_base *base, struct timeval *tv) 350int event_base_loopexit (struct event_base *base, struct timeval *tv)
354{ 351{
355 ev_tstamp after = tv_get (tv); 352 ev_tstamp after = ev_tv_get (tv);
356 dLOOPbase; 353 dLOOPbase;
357 354
358 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 355 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
359 356
360 return -1; 357 return 0;
361} 358}
362 359
363struct x_once 360struct ev_x_once
364{ 361{
365 int fd; 362 int fd;
366 void (*cb)(int, short, void *); 363 void (*cb)(int, short, void *);
367 void *arg; 364 void *arg;
368}; 365};
369 366
370static void 367static void
371x_once_cb (int revents, void *arg) 368ev_x_once_cb (int revents, void *arg)
372{ 369{
373 struct x_once *once = (struct x_once *)arg; 370 struct ev_x_once *once = (struct ev_x_once *)arg;
374 371
375 once->cb (once->fd, (short)revents, once->arg); 372 once->cb (once->fd, (short)revents, once->arg);
376 free (once); 373 free (once);
377} 374}
378 375
379int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 376int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
380{ 377{
381 struct x_once *once = (struct x_once *)malloc (sizeof (struct x_once)); 378 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
382 dLOOPbase; 379 dLOOPbase;
383 380
384 if (!once) 381 if (!once)
385 return -1; 382 return -1;
386 383
387 once->fd = fd; 384 once->fd = fd;
388 once->cb = cb; 385 once->cb = cb;
389 once->arg = arg; 386 once->arg = arg;
390 387
391 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 388 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
392 389
393 return 0; 390 return 0;
394} 391}
395 392
396int event_base_priority_init (struct event_base *base, int npri) 393int event_base_priority_init (struct event_base *base, int npri)

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