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

Comparing libev/event.c (file contents):
Revision 1.7 by root, Sat Nov 3 21:58:51 2007 UTC vs.
Revision 1.46 by root, Sun Oct 24 17:19:47 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/* same definition as in ev.c */
51#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
52
53#if EV_MULTIPLICITY
54# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
55# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
56#else
38#define dLOOPev 57# define dLOOPev
39#define dLOOPbase 58# define dLOOPbase
59#endif
40 60
61/* never accessed, will always be cast from/to ev_loop */
41struct event_base 62struct event_base
42{ 63{
43 int dummy; 64 int dummy;
44}; 65};
45 66
46static struct event_base x_base, *x_cur; 67static struct event_base *ev_x_cur;
47
48static void
49tv_set (struct timeval *tv, ev_tstamp at)
50{
51 tv->tv_sec = (long)at;
52 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
53}
54 68
55static ev_tstamp 69static ev_tstamp
56tv_get (struct timeval *tv) 70ev_tv_get (struct timeval *tv)
57{ 71{
58 if (tv) 72 if (tv)
73 {
59 return tv->tv_sec + tv->tv_usec * 1e-6; 74 ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
75 return after ? after : 1e-6;
76 }
60 else 77 else
61 return -1.; 78 return -1.;
62} 79}
63 80
64#define EVENT_VERSION(a,b) # a "." # b 81#define EVENT_STRINGIFY(s) # s
82#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
65 83
66const char *event_get_version (void) 84const char *event_get_version (void)
67{ 85{
86 /* returns ABI, not API or library, version */
68 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 87 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
69} 88}
70 89
71const char *event_get_method (void) 90const char *event_get_method (void)
72{ 91{
73 return "libev"; 92 return "libev";
74} 93}
75 94
76void *event_init (void) 95void *event_init (void)
77{ 96{
78 if (!x_cur && ev_init (0)) 97#if EV_MULTIPLICITY
79 return x_cur = &x_base; 98 if (ev_x_cur)
99 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
100 else
101 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
102#else
103 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
80 104
81 return 0; 105 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
106#endif
107
108 return ev_x_cur;
82} 109}
83 110
84void event_base_free (struct event_base *base) 111void event_base_free (struct event_base *base)
85{ 112{
86 /* nop */ 113 dLOOPbase;
114
115#if EV_MULTIPLICITY
116 if (ev_default_loop (EVFLAG_AUTO) != loop)
117 ev_loop_destroy (loop);
118#endif
87} 119}
88 120
89int event_dispatch (void) 121int event_dispatch (void)
90{ 122{
91 return event_base_dispatch (x_cur); 123 return event_base_dispatch (ev_x_cur);
92} 124}
93 125
94#ifdef EV_STANDALONE 126#ifdef EV_STANDALONE
95void event_set_log_callback (event_log_cb cb) 127void event_set_log_callback (event_log_cb cb)
96{ 128{
… …
98} 130}
99#endif 131#endif
100 132
101int event_loop (int flags) 133int event_loop (int flags)
102{ 134{
103 return event_base_loop (x_cur, flags); 135 return event_base_loop (ev_x_cur, flags);
104} 136}
105 137
106int event_loopexit (struct timeval *tv) 138int event_loopexit (struct timeval *tv)
107{ 139{
108 return event_base_loopexit (x_cur, tv); 140 return event_base_loopexit (ev_x_cur, tv);
109} 141}
110 142
111static void 143static void
112x_cb (struct event *ev, int revents) 144ev_x_cb (struct event *ev, int revents)
113{ 145{
114 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 146 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
115 147
116 ev->ev_res = revents; 148 ev->ev_res = revents;
117 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 149 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
118} 150}
119 151
120static void 152static void
121x_cb_sig (EV_P_ struct ev_signal *w, int revents) 153ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
122{ 154{
123 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); 155 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
124}
125 156
157 if (revents & EV_ERROR)
158 event_del (ev);
159
160 ev_x_cb (ev, revents);
161}
162
126static void 163static void
127x_cb_io (EV_P_ struct ev_io *w, int revents) 164ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
128{ 165{
129 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 166 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
130 167
131 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 168 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
132 ev_io_stop (w); 169 event_del (ev);
133 170
134 x_cb (ev, revents); 171 ev_x_cb (ev, revents);
135} 172}
136 173
137static void 174static void
138x_cb_to (EV_P_ struct ev_timer *w, int revents) 175ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
139{ 176{
140 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents); 177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178
179 event_del (ev);
180
181 ev_x_cb (ev, revents);
141} 182}
142 183
143void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 184void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
144{ 185{
145 if (events & EV_SIGNAL) 186 if (events & EV_SIGNAL)
146 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 187 ev_init (&ev->iosig.sig, ev_x_cb_sig);
147 else 188 else
148 ev_watcher_init (&ev->iosig.io, x_cb_io); 189 ev_init (&ev->iosig.io, ev_x_cb_io);
149 190
150 ev_watcher_init (&ev->to, x_cb_to); 191 ev_init (&ev->to, ev_x_cb_to);
151 192
152 ev->ev_base = x_cur; 193 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
153 ev->ev_fd = fd; 194 ev->ev_fd = fd;
154 ev->ev_events = events; 195 ev->ev_events = events;
155 ev->ev_pri = 0; 196 ev->ev_pri = 0;
156 ev->ev_callback = cb; 197 ev->ev_callback = cb;
157 ev->ev_arg = arg; 198 ev->ev_arg = arg;
158 ev->ev_res = 0; 199 ev->ev_res = 0;
200 ev->ev_flags = EVLIST_INIT;
159} 201}
160 202
161int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 203int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
162{ 204{
163 return event_base_once (x_cur, fd, events, cb, arg, tv); 205 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
164} 206}
165 207
166int event_add (struct event *ev, struct timeval *tv) 208int event_add (struct event *ev, struct timeval *tv)
167{ 209{
168 dLOOPev; 210 dLOOPev;
169 211
170 /* disable all watchers */
171 event_del (ev);
172
173 if (ev->ev_events & EV_SIGNAL) 212 if (ev->ev_events & EV_SIGNAL)
174 { 213 {
214 if (!ev_is_active (&ev->iosig.sig))
215 {
175 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 216 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
176 ev_signal_start (EV_A_ &ev->iosig.sig); 217 ev_signal_start (EV_A_ &ev->iosig.sig);
218
219 ev->ev_flags |= EVLIST_SIGNAL;
220 }
177 } 221 }
178 else if (ev->ev_events & (EV_READ | EV_WRITE)) 222 else if (ev->ev_events & (EV_READ | EV_WRITE))
179 { 223 {
224 if (!ev_is_active (&ev->iosig.io))
225 {
180 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 226 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); 227 ev_io_start (EV_A_ &ev->iosig.io);
228
229 ev->ev_flags |= EVLIST_INSERTED;
230 }
182 } 231 }
183 232
184 if (tv) 233 if (tv)
185 { 234 {
186 ev_timer_set (&ev->to, tv_get (tv), 0.); 235 ev->to.repeat = ev_tv_get (tv);
236 ev_timer_again (EV_A_ &ev->to);
237 ev->ev_flags |= EVLIST_TIMEOUT;
238 }
239 else
240 {
187 ev_timer_start (EV_A_ &ev->to); 241 ev_timer_stop (EV_A_ &ev->to);
242 ev->ev_flags &= ~EVLIST_TIMEOUT;
188 } 243 }
244
245 ev->ev_flags |= EVLIST_ACTIVE;
189 246
190 return 0; 247 return 0;
191} 248}
192 249
193int event_del (struct event *ev) 250int event_del (struct event *ev)
194{ 251{
195 dLOOPev; 252 dLOOPev;
196 253
197 if (ev->ev_events & EV_SIGNAL) 254 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); 255 ev_signal_stop (EV_A_ &ev->iosig.sig);
202 } 256 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); 257 ev_io_stop (EV_A_ &ev->iosig.io);
208 }
209 258
210 if (ev_is_active (&ev->to)) 259 if (ev_is_active (&ev->to))
211 ev_timer_stop (EV_A_ &ev->to); 260 ev_timer_stop (EV_A_ &ev->to);
212 261
262 ev->ev_flags = EVLIST_INIT;
263
213 return 0; 264 return 0;
265}
266
267void event_active (struct event *ev, int res, short ncalls)
268{
269 dLOOPev;
270
271 if (res & EV_TIMEOUT)
272 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
273
274 if (res & EV_SIGNAL)
275 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
276
277 if (res & (EV_READ | EV_WRITE))
278 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
214} 279}
215 280
216int event_pending (struct event *ev, short events, struct timeval *tv) 281int event_pending (struct event *ev, short events, struct timeval *tv)
217{ 282{
283 short revents = 0;
218 dLOOPev; 284 dLOOPev;
219 285
220 short revents = 0;
221
222 if (ev->ev_events & EV_SIGNAL) 286 if (ev->ev_events & EV_SIGNAL)
223 { 287 {
224 /* sig */ 288 /* sig */
225 if (ev->iosig.sig.pending) 289 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
226 revents |= EV_SIGNAL; 290 revents |= EV_SIGNAL;
227 } 291 }
228 else 292 else if (ev->ev_events & (EV_READ | EV_WRITE))
229 { 293 {
230 /* io */ 294 /* io */
231 if (ev->iosig.io.pending) 295 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
232 revents |= ev->ev_events & (EV_READ | EV_WRITE); 296 revents |= ev->ev_events & (EV_READ | EV_WRITE);
233 } 297 }
234 298
235 if (ev->to.pending) 299 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
236 { 300 {
237 revents |= EV_TIMEOUT; 301 revents |= EV_TIMEOUT;
238 302
239 if (tv) 303 if (tv)
240 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 304 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
241 } 305 }
242 306
243 return events & revents; 307 return events & revents;
244} 308}
245 309
246int event_priority_init (int npri) 310int event_priority_init (int npri)
247{ 311{
248 return event_base_priority_init (x_cur, npri); 312 return event_base_priority_init (ev_x_cur, npri);
249} 313}
250 314
251int event_priority_set (struct event *ev, int pri) 315int event_priority_set (struct event *ev, int pri)
252{ 316{
253 ev->ev_pri = pri; 317 ev->ev_pri = pri;
… …
263} 327}
264 328
265int event_base_loop (struct event_base *base, int flags) 329int event_base_loop (struct event_base *base, int flags)
266{ 330{
267 dLOOPbase; 331 dLOOPbase;
268 ev_loop (EV_A_ flags | EVLOOP_ONESHOT); 332
333 ev_run (EV_A_ flags);
269 334
270 return 0; 335 return 0;
271} 336}
272 337
273int event_base_dispatch (struct event_base *base) 338int event_base_dispatch (struct event_base *base)
274{ 339{
275 return event_base_loop (base, 0); 340 return event_base_loop (base, 0);
276} 341}
277 342
278static void 343static void
279x_loopexit_cb (EV_P_ int revents, void *arg) 344ev_x_loopexit_cb (int revents, void *base)
280{ 345{
281 ev_unloop (EV_A_ 2); 346 dLOOPbase;
347
348 ev_break (EV_A_ EVBREAK_ONE);
282} 349}
283 350
284int event_base_loopexit (struct event_base *base, struct timeval *tv) 351int event_base_loopexit (struct event_base *base, struct timeval *tv)
285{ 352{
353 ev_tstamp after = ev_tv_get (tv);
286 dLOOPbase; 354 dLOOPbase;
287 ev_tstamp after = tv_get (tv);
288 355
289 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 356 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
290 357
291 return -1; 358 return 0;
292} 359}
293 360
294struct x_once 361struct ev_x_once
295{ 362{
296 int fd; 363 int fd;
297 void (*cb)(int, short, void *); 364 void (*cb)(int, short, void *);
298 void *arg; 365 void *arg;
299}; 366};
300 367
301static void 368static void
302x_once_cb (int revents, void *arg) 369ev_x_once_cb (int revents, void *arg)
303{ 370{
304 struct x_once *once = arg; 371 struct ev_x_once *once = (struct ev_x_once *)arg;
305 372
306 once->cb (once->fd, revents, once->arg); 373 once->cb (once->fd, (short)revents, once->arg);
307 free (once); 374 free (once);
308} 375}
309 376
310int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 377int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
311{ 378{
379 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
312 dLOOPbase; 380 dLOOPbase;
313 struct x_once *once = malloc (sizeof (struct x_once));
314 381
315 if (!once) 382 if (!once)
316 return -1; 383 return -1;
317 384
318 once->fd = fd; 385 once->fd = fd;
319 once->cb = cb; 386 once->cb = cb;
320 once->arg = arg; 387 once->arg = arg;
321 388
322 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 389 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
323 390
324 return 0; 391 return 0;
325} 392}
326 393
327int event_base_priority_init (struct event_base *base, int npri) 394int event_base_priority_init (struct event_base *base, int npri)
328{ 395{
329 dLOOPbase; 396 /*dLOOPbase;*/
330 397
331 return 0; 398 return 0;
332} 399}
333 400

Diff Legend

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