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Comparing libev/event.c (file contents):
Revision 1.4 by root, Fri Nov 2 13:08:51 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
57# define dLOOPev
58# define dLOOPbase
59#endif
60
61/* never accessed, will always be cast from/to ev_loop */
38struct event_base 62struct event_base
39{ 63{
40 int dummy; 64 int dummy;
41}; 65};
42 66
43static int x_actives;
44
45static struct event_base x_base, *x_cur; 67static struct event_base *ev_x_cur;
46
47static void
48tv_set (struct timeval *tv, ev_tstamp at)
49{
50 tv->tv_sec = (long)at;
51 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
52}
53 68
54static ev_tstamp 69static ev_tstamp
55tv_get (struct timeval *tv) 70ev_tv_get (struct timeval *tv)
56{ 71{
57 if (tv) 72 if (tv)
73 {
58 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 }
59 else 77 else
60 return -1.; 78 return -1.;
61} 79}
62 80
63#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)
64 83
65const char *event_get_version (void) 84const char *event_get_version (void)
66{ 85{
86 /* returns ABI, not API or library, version */
67 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 87 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
68} 88}
69 89
70const char *event_get_method (void) 90const char *event_get_method (void)
71{ 91{
72 return "libev"; 92 return "libev";
73} 93}
74 94
75void *event_init (void) 95void *event_init (void)
76{ 96{
77 if (ev_init (0)) 97#if EV_MULTIPLICITY
78 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));
79 104
80 return 0; 105 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
106#endif
107
108 return ev_x_cur;
81} 109}
82 110
83void event_base_free (struct event_base *base) 111void event_base_free (struct event_base *base)
84{ 112{
113 dLOOPbase;
114
115#if EV_MULTIPLICITY
116 if (ev_default_loop (EVFLAG_AUTO) != loop)
117 ev_loop_destroy (loop);
118#endif
119}
120
121int event_dispatch (void)
122{
123 return event_base_dispatch (ev_x_cur);
124}
125
126#ifdef EV_STANDALONE
127void event_set_log_callback (event_log_cb cb)
128{
85 /* nop */ 129 /* nop */
86} 130}
87 131#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}
97 132
98int event_loop (int flags) 133int event_loop (int flags)
99{ 134{
100 return event_base_loop (x_cur, flags); 135 return event_base_loop (ev_x_cur, flags);
101} 136}
102 137
103int event_loopexit (struct timeval *tv) 138int event_loopexit (struct timeval *tv)
104{ 139{
105 event_base_loopexit (x_cur, tv); 140 return event_base_loopexit (ev_x_cur, tv);
106} 141}
107 142
108static void 143static void
109x_cb (struct event *ev, int revents) 144ev_x_cb (struct event *ev, int revents)
110{ 145{
146 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
147
148 ev->ev_res = revents;
149 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
150}
151
152static void
153ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
154{
155 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
156
157 if (revents & EV_ERROR)
158 event_del (ev);
159
160 ev_x_cb (ev, revents);
161}
162
163static void
164ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
165{
166 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
167
168 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
169 event_del (ev);
170
171 ev_x_cb (ev, revents);
172}
173
174static void
175ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
176{
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178
179 event_del (ev);
180
181 ev_x_cb (ev, revents);
182}
183
184void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
185{
111 if (ev->ev_events & EV_SIGNAL) 186 if (events & EV_SIGNAL)
112 { 187 ev_init (&ev->iosig.sig, ev_x_cb_sig);
113 /* sig */
114 if (ev_is_active (&ev->iosig.sig))
115 {
116 ev_signal_stop (&ev->iosig.sig);
117 --x_actives;
118 }
119 }
120 else 188 else
121 {
122 /* io */
123 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (&ev->iosig.io))
124 {
125 ev_io_stop (&ev->iosig.io);
126 --x_actives;
127 }
128 }
129
130 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
131
132 if (revents & EV_TIMEOUT)
133 --x_actives;
134
135 ev->ev_res = revents;
136 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg);
137}
138
139static void
140x_cb_io (struct ev_io *w, int revents)
141{
142 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.io)), revents);
143}
144
145static void
146x_cb_to (struct ev_timer *w, int revents)
147{
148 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents);
149}
150
151static void
152x_cb_sig (struct ev_signal *w, int revents)
153{
154 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents);
155}
156
157void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
158{
159 if (events & EV_SIGNAL)
160 ev_watcher_init (&ev->iosig.sig, x_cb_sig);
161 else
162 ev_watcher_init (&ev->iosig.io, x_cb_io); 189 ev_init (&ev->iosig.io, ev_x_cb_io);
163 190
164 ev_watcher_init (&ev->to, x_cb_to); 191 ev_init (&ev->to, ev_x_cb_to);
165 192
166 ev->ev_base = x_cur; 193 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
167 ev->ev_fd = fd; 194 ev->ev_fd = fd;
168 ev->ev_events = events; 195 ev->ev_events = events;
169 ev->ev_pri = 0; 196 ev->ev_pri = 0;
170 ev->ev_callback = cb; 197 ev->ev_callback = cb;
171 ev->ev_arg = arg; 198 ev->ev_arg = arg;
172 ev->ev_res = 0; 199 ev->ev_res = 0;
200 ev->ev_flags = EVLIST_INIT;
173} 201}
174 202
175int 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)
176{ 204{
177 event_base_once (x_cur, fd, events, cb, arg, tv); 205 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
178} 206}
179 207
180int event_add (struct event *ev, struct timeval *tv) 208int event_add (struct event *ev, struct timeval *tv)
181{ 209{
182 /* disable all watchers */ 210 dLOOPev;
183 event_del (ev);
184 211
185 if (ev->ev_events & EV_SIGNAL) 212 if (ev->ev_events & EV_SIGNAL)
186 { 213 {
214 if (!ev_is_active (&ev->iosig.sig))
215 {
187 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 216 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
188 ev_signal_start (&ev->iosig.sig); 217 ev_signal_start (EV_A_ &ev->iosig.sig);
189 ++x_actives; 218
219 ev->ev_flags |= EVLIST_SIGNAL;
220 }
190 } 221 }
191 else if (ev->ev_events & (EV_READ | EV_WRITE)) 222 else if (ev->ev_events & (EV_READ | EV_WRITE))
192 { 223 {
224 if (!ev_is_active (&ev->iosig.io))
225 {
193 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));
194 ev_io_start (&ev->iosig.io); 227 ev_io_start (EV_A_ &ev->iosig.io);
195 ++x_actives; 228
229 ev->ev_flags |= EVLIST_INSERTED;
230 }
196 } 231 }
197 232
198 if (tv) 233 if (tv)
199 { 234 {
200 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 {
201 ev_timer_start (&ev->to); 241 ev_timer_stop (EV_A_ &ev->to);
202 ++x_actives; 242 ev->ev_flags &= ~EVLIST_TIMEOUT;
203 } 243 }
244
245 ev->ev_flags |= EVLIST_ACTIVE;
204 246
205 return 0; 247 return 0;
206} 248}
207 249
208int event_del (struct event *ev) 250int event_del (struct event *ev)
209{ 251{
252 dLOOPev;
253
210 if (ev->ev_events & EV_SIGNAL) 254 if (ev->ev_events & EV_SIGNAL)
255 ev_signal_stop (EV_A_ &ev->iosig.sig);
256 else if (ev->ev_events & (EV_READ | EV_WRITE))
257 ev_io_stop (EV_A_ &ev->iosig.io);
258
259 if (ev_is_active (&ev->to))
260 ev_timer_stop (EV_A_ &ev->to);
261
262 ev->ev_flags = EVLIST_INIT;
263
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));
279}
280
281int event_pending (struct event *ev, short events, struct timeval *tv)
282{
283 short revents = 0;
284 dLOOPev;
285
286 if (ev->ev_events & EV_SIGNAL)
211 { 287 {
212 /* sig */ 288 /* sig */
213 if (ev_is_active (&ev->iosig.sig)) 289 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
214 { 290 revents |= EV_SIGNAL;
215 ev_signal_stop (&ev->iosig.sig);
216 --x_actives;
217 }
218 } 291 }
219 else 292 else if (ev->ev_events & (EV_READ | EV_WRITE))
220 { 293 {
221 /* io */ 294 /* io */
222 if (ev_is_active (&ev->iosig.io)) 295 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
223 {
224 ev_io_stop (&ev->iosig.io);
225 --x_actives;
226 }
227 }
228
229 if (ev_is_active (&ev->to))
230 {
231 ev_timer_stop (&ev->to);
232 --x_actives;
233 }
234
235 return 0;
236}
237
238int event_pending (struct event *ev, short events, struct timeval *tv)
239{
240 short revents;
241
242 if (ev->ev_events & EV_SIGNAL)
243 {
244 /* sig */
245 if (ev->iosig.sig.pending)
246 revents |= EV_SIGNAL;
247 }
248 else
249 {
250 /* io */
251 if (ev->iosig.io.pending)
252 revents |= ev->ev_events & (EV_READ | EV_WRITE); 296 revents |= ev->ev_events & (EV_READ | EV_WRITE);
253 } 297 }
254 298
255 if (ev->to.pending) 299 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
256 { 300 {
257 revents |= EV_TIMEOUT; 301 revents |= EV_TIMEOUT;
258 302
259 if (tv) 303 if (tv)
260 tv_set (tv, ev_now); /* not sure if this is right :) */ 304 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
261 } 305 }
262 306
263 return events & revents; 307 return events & revents;
264} 308}
265 309
266int event_priority_init (int npri) 310int event_priority_init (int npri)
267{ 311{
268 return event_base_priority_init (x_cur, npri); 312 return event_base_priority_init (ev_x_cur, npri);
269} 313}
270 314
271int event_priority_set (struct event *ev, int pri) 315int event_priority_set (struct event *ev, int pri)
272{ 316{
273 ev->ev_pri = pri; 317 ev->ev_pri = pri;
… …
282 return 0; 326 return 0;
283} 327}
284 328
285int event_base_loop (struct event_base *base, int flags) 329int event_base_loop (struct event_base *base, int flags)
286{ 330{
287 do 331 dLOOPbase;
288 { 332
289 ev_loop (flags | EVLOOP_ONESHOT); 333 ev_run (EV_A_ flags);
290 }
291 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
292 334
293 return 0; 335 return 0;
294} 336}
295 337
296int event_base_dispatch (struct event_base *base) 338int event_base_dispatch (struct event_base *base)
297{ 339{
298 return event_base_loop (base, 0); 340 return event_base_loop (base, 0);
299} 341}
300 342
301static void 343static void
302x_loopexit_cb (int revents, void *arg) 344ev_x_loopexit_cb (int revents, void *base)
303{ 345{
304 ev_loop_done = 2; 346 dLOOPbase;
347
348 ev_break (EV_A_ EVBREAK_ONE);
305} 349}
306 350
307int event_base_loopexit (struct event_base *base, struct timeval *tv) 351int event_base_loopexit (struct event_base *base, struct timeval *tv)
308{ 352{
309 ev_tstamp after = tv_get (tv); 353 ev_tstamp after = ev_tv_get (tv);
354 dLOOPbase;
310 355
311 ev_once (-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);
312}
313 357
358 return 0;
359}
360
314struct x_once 361struct ev_x_once
315{ 362{
316 int fd; 363 int fd;
317 void (*cb)(int, short, void *); 364 void (*cb)(int, short, void *);
318 void *arg; 365 void *arg;
319}; 366};
320 367
321static void 368static void
322x_once_cb (int revents, void *arg) 369ev_x_once_cb (int revents, void *arg)
323{ 370{
324 struct x_once *once = arg; 371 struct ev_x_once *once = (struct ev_x_once *)arg;
325 372
326 once->cb (once->fd, revents, once->arg); 373 once->cb (once->fd, (short)revents, once->arg);
327 free (once); 374 free (once);
328} 375}
329 376
330int 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)
331{ 378{
332 struct x_once *once = malloc (sizeof (struct x_once)); 379 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
380 dLOOPbase;
333 381
334 if (!once) 382 if (!once)
335 return -1; 383 return -1;
336 384
337 once->fd = fd; 385 once->fd = fd;
338 once->cb = cb; 386 once->cb = cb;
339 once->arg = arg; 387 once->arg = arg;
340 388
341 ev_once (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);
342 390
343 return 0; 391 return 0;
344} 392}
345 393
346int event_base_priority_init (struct event_base *base, int npri) 394int event_base_priority_init (struct event_base *base, int npri)
347{ 395{
348 return 0; 396 /*dLOOPbase;*/
349}
350 397
398 return 0;
399}
400

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