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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 1.52 by root, Mon Apr 2 23:14:41 2012 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) 2007,2008,2009,2010,2012 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:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 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
12 * notice, this list of conditions and the following disclaimer. 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
13 * 16 *
14 * * Redistributions in binary form must reproduce the above 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 * copyright notice, this list of conditions and the following 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
16 * disclaimer in the documentation and/or other materials provided 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
17 * with the distribution. 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
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
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 65
55static ev_tstamp 66static ev_tstamp
56tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
57{ 68{
58 if (tv) 69 if (tv)
70 {
59 return tv->tv_sec + tv->tv_usec * 1e-6; 71 ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
72 return after ? after : 1e-6;
73 }
60 else 74 else
61 return -1.; 75 return -1.;
62} 76}
63 77
64#define EVENT_VERSION(a,b) # a "." # b 78#define EVENT_STRINGIFY(s) # s
79#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
65 80
81const char *
66const char *event_get_version (void) 82event_get_version (void)
67{ 83{
84 /* returns ABI, not API or library, version */
68 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 85 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
69} 86}
70 87
88const char *
71const char *event_get_method (void) 89event_get_method (void)
72{ 90{
73 return "libev"; 91 return "libev";
74} 92}
75 93
76void *event_init (void) 94void *event_init (void)
77{ 95{
78 if (!x_cur && ev_init (0)) 96#if EV_MULTIPLICITY
79 return x_cur = &x_base; 97 if (ev_x_cur)
98 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
99 else
100 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
101#else
102 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
80 103
104 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
105#endif
106
107 return ev_x_cur;
108}
109
110const char *
111event_base_get_method (const struct event_base *base)
112{
113 return "libev";
114}
115
116struct event_base *
117event_base_new (void)
118{
119#if EV_MULTIPLICITY
120 return (struct event_base *)ev_loop_new (EVFLAG_AUTO);
121#else
122 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY"));
81 return 0; 123 return NULL;
124#endif
82} 125}
83 126
84void event_base_free (struct event_base *base) 127void event_base_free (struct event_base *base)
85{ 128{
86 /* nop */ 129 dLOOPbase;
130
131#if EV_MULTIPLICITY
132 if (!ev_is_default_loop (loop))
133 ev_loop_destroy (loop);
134#endif
87} 135}
88 136
89int event_dispatch (void) 137int event_dispatch (void)
90{ 138{
91 return event_base_dispatch (x_cur); 139 return event_base_dispatch (ev_x_cur);
92} 140}
93 141
94#ifdef EV_STANDALONE 142#ifdef EV_STANDALONE
95void event_set_log_callback (event_log_cb cb) 143void event_set_log_callback (event_log_cb cb)
96{ 144{
… …
98} 146}
99#endif 147#endif
100 148
101int event_loop (int flags) 149int event_loop (int flags)
102{ 150{
103 return event_base_loop (x_cur, flags); 151 return event_base_loop (ev_x_cur, flags);
104} 152}
105 153
106int event_loopexit (struct timeval *tv) 154int event_loopexit (struct timeval *tv)
107{ 155{
108 return event_base_loopexit (x_cur, tv); 156 return event_base_loopexit (ev_x_cur, tv);
109} 157}
110 158
159event_callback_fn event_get_callback
160(const struct event *ev)
161{
162 return ev->ev_callback;
163}
164
111static void 165static void
112x_cb (struct event *ev, int revents) 166ev_x_cb (struct event *ev, int revents)
113{ 167{
114 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 168 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
115 169
116 ev->ev_res = revents; 170 ev->ev_res = revents;
117 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 171 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
118} 172}
119 173
120static void 174static void
121x_cb_sig (EV_P_ struct ev_signal *w, int revents) 175ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
122{ 176{
123 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); 177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
124}
125 178
179 if (revents & EV_ERROR)
180 event_del (ev);
181
182 ev_x_cb (ev, revents);
183}
184
126static void 185static void
127x_cb_io (EV_P_ struct ev_io *w, int revents) 186ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
128{ 187{
129 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 188 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
130 189
131 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 190 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
132 ev_io_stop (w); 191 event_del (ev);
133 192
134 x_cb (ev, revents); 193 ev_x_cb (ev, revents);
135} 194}
136 195
137static void 196static void
138x_cb_to (EV_P_ struct ev_timer *w, int revents) 197ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
139{ 198{
140 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents); 199 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
200
201 event_del (ev);
202
203 ev_x_cb (ev, revents);
141} 204}
142 205
143void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 206void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
144{ 207{
145 if (events & EV_SIGNAL) 208 if (events & EV_SIGNAL)
146 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 209 ev_init (&ev->iosig.sig, ev_x_cb_sig);
147 else 210 else
148 ev_watcher_init (&ev->iosig.io, x_cb_io); 211 ev_init (&ev->iosig.io, ev_x_cb_io);
149 212
150 ev_watcher_init (&ev->to, x_cb_to); 213 ev_init (&ev->to, ev_x_cb_to);
151 214
152 ev->ev_base = x_cur; 215 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
153 ev->ev_fd = fd; 216 ev->ev_fd = fd;
154 ev->ev_events = events; 217 ev->ev_events = events;
155 ev->ev_pri = 0; 218 ev->ev_pri = 0;
156 ev->ev_callback = cb; 219 ev->ev_callback = cb;
157 ev->ev_arg = arg; 220 ev->ev_arg = arg;
158 ev->ev_res = 0; 221 ev->ev_res = 0;
222 ev->ev_flags = EVLIST_INIT;
159} 223}
160 224
161int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 225int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
162{ 226{
163 return event_base_once (x_cur, fd, events, cb, arg, tv); 227 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
164} 228}
165 229
166int event_add (struct event *ev, struct timeval *tv) 230int event_add (struct event *ev, struct timeval *tv)
167{ 231{
168 dLOOPev; 232 dLOOPev;
169 233
170 /* disable all watchers */
171 event_del (ev);
172
173 if (ev->ev_events & EV_SIGNAL) 234 if (ev->ev_events & EV_SIGNAL)
174 { 235 {
236 if (!ev_is_active (&ev->iosig.sig))
237 {
175 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 238 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
176 ev_signal_start (EV_A_ &ev->iosig.sig); 239 ev_signal_start (EV_A_ &ev->iosig.sig);
240
241 ev->ev_flags |= EVLIST_SIGNAL;
242 }
177 } 243 }
178 else if (ev->ev_events & (EV_READ | EV_WRITE)) 244 else if (ev->ev_events & (EV_READ | EV_WRITE))
179 { 245 {
246 if (!ev_is_active (&ev->iosig.io))
247 {
180 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 248 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); 249 ev_io_start (EV_A_ &ev->iosig.io);
250
251 ev->ev_flags |= EVLIST_INSERTED;
252 }
182 } 253 }
183 254
184 if (tv) 255 if (tv)
185 { 256 {
186 ev_timer_set (&ev->to, tv_get (tv), 0.); 257 ev->to.repeat = ev_tv_get (tv);
258 ev_timer_again (EV_A_ &ev->to);
259 ev->ev_flags |= EVLIST_TIMEOUT;
260 }
261 else
262 {
187 ev_timer_start (EV_A_ &ev->to); 263 ev_timer_stop (EV_A_ &ev->to);
264 ev->ev_flags &= ~EVLIST_TIMEOUT;
188 } 265 }
266
267 ev->ev_flags |= EVLIST_ACTIVE;
189 268
190 return 0; 269 return 0;
191} 270}
192 271
193int event_del (struct event *ev) 272int event_del (struct event *ev)
194{ 273{
195 dLOOPev; 274 dLOOPev;
196 275
197 if (ev->ev_events & EV_SIGNAL) 276 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); 277 ev_signal_stop (EV_A_ &ev->iosig.sig);
202 } 278 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); 279 ev_io_stop (EV_A_ &ev->iosig.io);
208 }
209 280
210 if (ev_is_active (&ev->to)) 281 if (ev_is_active (&ev->to))
211 ev_timer_stop (EV_A_ &ev->to); 282 ev_timer_stop (EV_A_ &ev->to);
212 283
284 ev->ev_flags = EVLIST_INIT;
285
213 return 0; 286 return 0;
287}
288
289void event_active (struct event *ev, int res, short ncalls)
290{
291 dLOOPev;
292
293 if (res & EV_TIMEOUT)
294 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
295
296 if (res & EV_SIGNAL)
297 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
298
299 if (res & (EV_READ | EV_WRITE))
300 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
214} 301}
215 302
216int event_pending (struct event *ev, short events, struct timeval *tv) 303int event_pending (struct event *ev, short events, struct timeval *tv)
217{ 304{
305 short revents = 0;
218 dLOOPev; 306 dLOOPev;
219 307
220 short revents = 0;
221
222 if (ev->ev_events & EV_SIGNAL) 308 if (ev->ev_events & EV_SIGNAL)
223 { 309 {
224 /* sig */ 310 /* sig */
225 if (ev->iosig.sig.pending) 311 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
226 revents |= EV_SIGNAL; 312 revents |= EV_SIGNAL;
227 } 313 }
228 else 314 else if (ev->ev_events & (EV_READ | EV_WRITE))
229 { 315 {
230 /* io */ 316 /* io */
231 if (ev->iosig.io.pending) 317 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
232 revents |= ev->ev_events & (EV_READ | EV_WRITE); 318 revents |= ev->ev_events & (EV_READ | EV_WRITE);
233 } 319 }
234 320
235 if (ev->to.pending) 321 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
236 { 322 {
237 revents |= EV_TIMEOUT; 323 revents |= EV_TIMEOUT;
238 324
239 if (tv) 325 if (tv)
240 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 326 {
327 ev_tstamp at = ev_now (EV_A);
328
329 tv->tv_sec = (long)at;
330 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
331 }
241 } 332 }
242 333
243 return events & revents; 334 return events & revents;
244} 335}
245 336
246int event_priority_init (int npri) 337int event_priority_init (int npri)
247{ 338{
248 return event_base_priority_init (x_cur, npri); 339 return event_base_priority_init (ev_x_cur, npri);
249} 340}
250 341
251int event_priority_set (struct event *ev, int pri) 342int event_priority_set (struct event *ev, int pri)
252{ 343{
253 ev->ev_pri = pri; 344 ev->ev_pri = pri;
… …
263} 354}
264 355
265int event_base_loop (struct event_base *base, int flags) 356int event_base_loop (struct event_base *base, int flags)
266{ 357{
267 dLOOPbase; 358 dLOOPbase;
268 ev_loop (EV_A_ flags | EVLOOP_ONESHOT);
269 359
270 return 0; 360 return !ev_run (EV_A_ flags);
271} 361}
272 362
273int event_base_dispatch (struct event_base *base) 363int event_base_dispatch (struct event_base *base)
274{ 364{
275 return event_base_loop (base, 0); 365 return event_base_loop (base, 0);
276} 366}
277 367
278static void 368static void
279x_loopexit_cb (EV_P_ int revents, void *arg) 369ev_x_loopexit_cb (int revents, void *base)
280{ 370{
281 ev_unloop (EV_A_ 2); 371 dLOOPbase;
372
373 ev_break (EV_A_ EVBREAK_ONE);
282} 374}
283 375
284int event_base_loopexit (struct event_base *base, struct timeval *tv) 376int event_base_loopexit (struct event_base *base, struct timeval *tv)
285{ 377{
378 ev_tstamp after = ev_tv_get (tv);
286 dLOOPbase; 379 dLOOPbase;
287 ev_tstamp after = tv_get (tv);
288 380
289 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 381 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
290 382
291 return -1; 383 return 0;
292} 384}
293 385
294struct x_once 386struct ev_x_once
295{ 387{
296 int fd; 388 int fd;
297 void (*cb)(int, short, void *); 389 void (*cb)(int, short, void *);
298 void *arg; 390 void *arg;
299}; 391};
300 392
301static void 393static void
302x_once_cb (int revents, void *arg) 394ev_x_once_cb (int revents, void *arg)
303{ 395{
304 struct x_once *once = arg; 396 struct ev_x_once *once = (struct ev_x_once *)arg;
305 397
306 once->cb (once->fd, revents, once->arg); 398 once->cb (once->fd, (short)revents, once->arg);
307 free (once); 399 free (once);
308} 400}
309 401
310int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 402int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
311{ 403{
404 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
312 dLOOPbase; 405 dLOOPbase;
313 struct x_once *once = malloc (sizeof (struct x_once));
314 406
315 if (!once) 407 if (!once)
316 return -1; 408 return -1;
317 409
318 once->fd = fd; 410 once->fd = fd;
319 once->cb = cb; 411 once->cb = cb;
320 once->arg = arg; 412 once->arg = arg;
321 413
322 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 414 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
323 415
324 return 0; 416 return 0;
325} 417}
326 418
327int event_base_priority_init (struct event_base *base, int npri) 419int event_base_priority_init (struct event_base *base, int npri)
328{ 420{
329 dLOOPbase; 421 /*dLOOPbase;*/
330 422
331 return 0; 423 return 0;
332} 424}
333 425

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