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Comparing libev/event.c (file contents):
Revision 1.6 by root, Sat Nov 3 20:24:42 2007 UTC vs.
Revision 1.38 by root, Mon Nov 17 03:37:08 2008 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 <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
54# define dLOOPev
55# define dLOOPbase
56#endif
57
58/* never accessed, will always be cast from/to ev_loop */
38struct event_base 59struct event_base
39{ 60{
40 int dummy; 61 int dummy;
41}; 62};
42 63
43static int x_actives;
44
45static struct event_base x_base, *x_cur; 64static struct event_base *ev_x_cur;
46 65
47static void 66static void
48tv_set (struct timeval *tv, ev_tstamp at) 67ev_tv_set (struct timeval *tv, ev_tstamp at)
49{ 68{
50 tv->tv_sec = (long)at; 69 tv->tv_sec = (long)at;
51 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); 70 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
52} 71}
53 72
54static ev_tstamp 73static ev_tstamp
55tv_get (struct timeval *tv) 74ev_tv_get (struct timeval *tv)
56{ 75{
57 if (tv) 76 if (tv)
58 return tv->tv_sec + tv->tv_usec * 1e-6; 77 return tv->tv_sec + tv->tv_usec * 1e-6;
59 else 78 else
60 return -1.; 79 return -1.;
… …
72 return "libev"; 91 return "libev";
73} 92}
74 93
75void *event_init (void) 94void *event_init (void)
76{ 95{
77 if (!x_cur && ev_init (0)) 96#if EV_MULTIPLICITY
78 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 (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
79 103
80 return 0; 104 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
105#endif
106
107 return ev_x_cur;
81} 108}
82 109
83void event_base_free (struct event_base *base) 110void event_base_free (struct event_base *base)
84{ 111{
85 /* nop */ 112 dLOOPbase;
113
114#if EV_MULTIPLICITY
115 if (ev_default_loop (EVFLAG_AUTO) != loop)
116 ev_loop_destroy (loop);
117#endif
86} 118}
87 119
88int event_dispatch (void) 120int event_dispatch (void)
89{ 121{
90 return event_base_dispatch (x_cur); 122 return event_base_dispatch (ev_x_cur);
91} 123}
92 124
93#ifdef EV_STANDALONE 125#ifdef EV_STANDALONE
94void event_set_log_callback (event_log_cb cb) 126void event_set_log_callback (event_log_cb cb)
95{ 127{
… …
97} 129}
98#endif 130#endif
99 131
100int event_loop (int flags) 132int event_loop (int flags)
101{ 133{
102 return event_base_loop (x_cur, flags); 134 return event_base_loop (ev_x_cur, flags);
103} 135}
104 136
105int event_loopexit (struct timeval *tv) 137int event_loopexit (struct timeval *tv)
106{ 138{
107 return event_base_loopexit (x_cur, tv); 139 return event_base_loopexit (ev_x_cur, tv);
108} 140}
109 141
110static void 142static void
111x_cb (struct event *ev, int revents) 143ev_x_cb (struct event *ev, int revents)
112{ 144{
145 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
146
147 ev->ev_res = revents;
148 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
149}
150
151static void
152ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
153{
154 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
155
156 if (revents & EV_ERROR)
157 event_del (ev);
158
159 ev_x_cb (ev, revents);
160}
161
162static void
163ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
164{
165 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
166
167 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
168 event_del (ev);
169
170 ev_x_cb (ev, revents);
171}
172
173static void
174ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
175{
176 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
177
178 event_del (ev);
179
180 ev_x_cb (ev, revents);
181}
182
183void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
184{
113 if (ev->ev_events & EV_SIGNAL) 185 if (events & EV_SIGNAL)
114 { 186 ev_init (&ev->iosig.sig, ev_x_cb_sig);
115 /* sig */
116 if (ev_is_active (&ev->iosig.sig))
117 {
118 ev_signal_stop (&ev->iosig.sig);
119 --x_actives;
120 }
121 }
122 else 187 else
123 {
124 /* io */
125 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (&ev->iosig.io))
126 {
127 ev_io_stop (&ev->iosig.io);
128 --x_actives;
129 }
130 }
131
132 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
133
134 if (revents & EV_TIMEOUT)
135 --x_actives;
136
137 ev->ev_res = revents;
138 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg);
139}
140
141static void
142x_cb_io (struct ev_io *w, int revents)
143{
144 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.io)), revents);
145}
146
147static void
148x_cb_to (struct ev_timer *w, int revents)
149{
150 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents);
151}
152
153static void
154x_cb_sig (struct ev_signal *w, int revents)
155{
156 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents);
157}
158
159void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
160{
161 if (events & EV_SIGNAL)
162 ev_watcher_init (&ev->iosig.sig, x_cb_sig);
163 else
164 ev_watcher_init (&ev->iosig.io, x_cb_io); 188 ev_init (&ev->iosig.io, ev_x_cb_io);
165 189
166 ev_watcher_init (&ev->to, x_cb_to); 190 ev_init (&ev->to, ev_x_cb_to);
167 191
168 ev->ev_base = x_cur; 192 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
169 ev->ev_fd = fd; 193 ev->ev_fd = fd;
170 ev->ev_events = events; 194 ev->ev_events = events;
171 ev->ev_pri = 0; 195 ev->ev_pri = 0;
172 ev->ev_callback = cb; 196 ev->ev_callback = cb;
173 ev->ev_arg = arg; 197 ev->ev_arg = arg;
174 ev->ev_res = 0; 198 ev->ev_res = 0;
199 ev->ev_flags = EVLIST_INIT;
175} 200}
176 201
177int 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)
178{ 203{
179 return event_base_once (x_cur, fd, events, cb, arg, tv); 204 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
180} 205}
181 206
182int event_add (struct event *ev, struct timeval *tv) 207int event_add (struct event *ev, struct timeval *tv)
183{ 208{
184 /* disable all watchers */ 209 dLOOPev;
185 event_del (ev);
186 210
187 if (ev->ev_events & EV_SIGNAL) 211 if (ev->ev_events & EV_SIGNAL)
188 { 212 {
213 if (!ev_is_active (&ev->iosig.sig))
214 {
189 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 215 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
190 ev_signal_start (&ev->iosig.sig); 216 ev_signal_start (EV_A_ &ev->iosig.sig);
191 ++x_actives; 217
218 ev->ev_flags |= EVLIST_SIGNAL;
219 }
192 } 220 }
193 else if (ev->ev_events & (EV_READ | EV_WRITE)) 221 else if (ev->ev_events & (EV_READ | EV_WRITE))
194 { 222 {
223 if (!ev_is_active (&ev->iosig.io))
224 {
195 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));
196 ev_io_start (&ev->iosig.io); 226 ev_io_start (EV_A_ &ev->iosig.io);
197 ++x_actives; 227
228 ev->ev_flags |= EVLIST_INSERTED;
229 }
198 } 230 }
199 231
200 if (tv) 232 if (tv)
201 { 233 {
202 ev_timer_set (&ev->to, tv_get (tv), 0.); 234 ev->to.repeat = ev_tv_get (tv);
235 ev_timer_again (EV_A_ &ev->to);
236 ev->ev_flags |= EVLIST_TIMEOUT;
237 }
238 else
239 {
203 ev_timer_start (&ev->to); 240 ev_timer_stop (EV_A_ &ev->to);
204 ++x_actives; 241 ev->ev_flags &= ~EVLIST_TIMEOUT;
205 } 242 }
243
244 ev->ev_flags |= EVLIST_ACTIVE;
206 245
207 return 0; 246 return 0;
208} 247}
209 248
210int event_del (struct event *ev) 249int event_del (struct event *ev)
211{ 250{
251 dLOOPev;
252
212 if (ev->ev_events & EV_SIGNAL) 253 if (ev->ev_events & EV_SIGNAL)
254 ev_signal_stop (EV_A_ &ev->iosig.sig);
255 else if (ev->ev_events & (EV_READ | EV_WRITE))
256 ev_io_stop (EV_A_ &ev->iosig.io);
257
258 if (ev_is_active (&ev->to))
259 ev_timer_stop (EV_A_ &ev->to);
260
261 ev->ev_flags = EVLIST_INIT;
262
263 return 0;
264}
265
266void event_active (struct event *ev, int res, short ncalls)
267{
268 dLOOPev;
269
270 if (res & EV_TIMEOUT)
271 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
272
273 if (res & EV_SIGNAL)
274 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
275
276 if (res & (EV_READ | EV_WRITE))
277 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
278}
279
280int event_pending (struct event *ev, short events, struct timeval *tv)
281{
282 short revents = 0;
283 dLOOPev;
284
285 if (ev->ev_events & EV_SIGNAL)
213 { 286 {
214 /* sig */ 287 /* sig */
215 if (ev_is_active (&ev->iosig.sig)) 288 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
216 { 289 revents |= EV_SIGNAL;
217 ev_signal_stop (&ev->iosig.sig);
218 --x_actives;
219 }
220 } 290 }
221 else 291 else if (ev->ev_events & (EV_READ | EV_WRITE))
222 { 292 {
223 /* io */ 293 /* io */
224 if (ev_is_active (&ev->iosig.io)) 294 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
225 {
226 ev_io_stop (&ev->iosig.io);
227 --x_actives;
228 }
229 }
230
231 if (ev_is_active (&ev->to))
232 {
233 ev_timer_stop (&ev->to);
234 --x_actives;
235 }
236
237 return 0;
238}
239
240int event_pending (struct event *ev, short events, struct timeval *tv)
241{
242 short revents = 0;
243
244 if (ev->ev_events & EV_SIGNAL)
245 {
246 /* sig */
247 if (ev->iosig.sig.pending)
248 revents |= EV_SIGNAL;
249 }
250 else
251 {
252 /* io */
253 if (ev->iosig.io.pending)
254 revents |= ev->ev_events & (EV_READ | EV_WRITE); 295 revents |= ev->ev_events & (EV_READ | EV_WRITE);
255 } 296 }
256 297
257 if (ev->to.pending) 298 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
258 { 299 {
259 revents |= EV_TIMEOUT; 300 revents |= EV_TIMEOUT;
260 301
261 if (tv) 302 if (tv)
262 tv_set (tv, ev_now); /* not sure if this is right :) */ 303 ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
263 } 304 }
264 305
265 return events & revents; 306 return events & revents;
266} 307}
267 308
268int event_priority_init (int npri) 309int event_priority_init (int npri)
269{ 310{
270 return event_base_priority_init (x_cur, npri); 311 return event_base_priority_init (ev_x_cur, npri);
271} 312}
272 313
273int event_priority_set (struct event *ev, int pri) 314int event_priority_set (struct event *ev, int pri)
274{ 315{
275 ev->ev_pri = pri; 316 ev->ev_pri = pri;
… …
284 return 0; 325 return 0;
285} 326}
286 327
287int event_base_loop (struct event_base *base, int flags) 328int event_base_loop (struct event_base *base, int flags)
288{ 329{
289 do 330 dLOOPbase;
290 { 331
291 ev_loop (flags | EVLOOP_ONESHOT); 332 ev_loop (EV_A_ flags);
292 }
293 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
294 333
295 return 0; 334 return 0;
296} 335}
297 336
298int event_base_dispatch (struct event_base *base) 337int event_base_dispatch (struct event_base *base)
299{ 338{
300 return event_base_loop (base, 0); 339 return event_base_loop (base, 0);
301} 340}
302 341
303static void 342static void
304x_loopexit_cb (int revents, void *arg) 343ev_x_loopexit_cb (int revents, void *base)
305{ 344{
306 ev_loop_done = 2; 345 dLOOPbase;
346
347 ev_unloop (EV_A_ EVUNLOOP_ONE);
307} 348}
308 349
309int event_base_loopexit (struct event_base *base, struct timeval *tv) 350int event_base_loopexit (struct event_base *base, struct timeval *tv)
310{ 351{
311 ev_tstamp after = tv_get (tv); 352 ev_tstamp after = ev_tv_get (tv);
353 dLOOPbase;
312 354
313 ev_once (-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);
314 356
315 return -1; 357 return 0;
316} 358}
317 359
318struct x_once 360struct ev_x_once
319{ 361{
320 int fd; 362 int fd;
321 void (*cb)(int, short, void *); 363 void (*cb)(int, short, void *);
322 void *arg; 364 void *arg;
323}; 365};
324 366
325static void 367static void
326x_once_cb (int revents, void *arg) 368ev_x_once_cb (int revents, void *arg)
327{ 369{
328 struct x_once *once = arg; 370 struct ev_x_once *once = (struct ev_x_once *)arg;
329 371
330 once->cb (once->fd, revents, once->arg); 372 once->cb (once->fd, (short)revents, once->arg);
331 free (once); 373 free (once);
332} 374}
333 375
334int 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)
335{ 377{
336 struct x_once *once = malloc (sizeof (struct x_once)); 378 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
379 dLOOPbase;
337 380
338 if (!once) 381 if (!once)
339 return -1; 382 return -1;
340 383
341 once->fd = fd; 384 once->fd = fd;
342 once->cb = cb; 385 once->cb = cb;
343 once->arg = arg; 386 once->arg = arg;
344 387
345 ev_once (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);
346 389
347 return 0; 390 return 0;
348} 391}
349 392
350int event_base_priority_init (struct event_base *base, int npri) 393int event_base_priority_init (struct event_base *base, int npri)
351{ 394{
352 return 0; 395 /*dLOOPbase;*/
353}
354 396
397 return 0;
398}
399

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