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Comparing libev/event.c (file contents):
Revision 1.5 by root, Sat Nov 3 19:41:56 2007 UTC vs.
Revision 1.44 by root, Sat Oct 16 06:46:55 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#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
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 65
54static ev_tstamp 66static ev_tstamp
55tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
56{ 68{
57 if (tv) 69 if (tv)
70 {
58 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 }
59 else 74 else
60 return -1.; 75 return -1.;
61} 76}
62 77
63#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)
64 80
65const char *event_get_version (void) 81const char *event_get_version (void)
66{ 82{
83 /* returns ABI, not API or library, version */
67 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 84 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
68} 85}
69 86
70const char *event_get_method (void) 87const char *event_get_method (void)
71{ 88{
72 return "libev"; 89 return "libev";
73} 90}
74 91
75void *event_init (void) 92void *event_init (void)
76{ 93{
77 if (ev_init (0)) 94#if EV_MULTIPLICITY
78 return x_cur = &x_base; 95 if (ev_x_cur)
96 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
97 else
98 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
99#else
100 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
79 101
80 return 0; 102 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
103#endif
104
105 return ev_x_cur;
81} 106}
82 107
83void event_base_free (struct event_base *base) 108void event_base_free (struct event_base *base)
84{ 109{
85 /* nop */ 110 dLOOPbase;
111
112#if EV_MULTIPLICITY
113 if (ev_default_loop (EVFLAG_AUTO) != loop)
114 ev_loop_destroy (loop);
115#endif
86} 116}
87 117
88int event_dispatch (void) 118int event_dispatch (void)
89{ 119{
90 return event_base_dispatch (x_cur); 120 return event_base_dispatch (ev_x_cur);
91} 121}
92 122
93#ifdef EV_STANDALONE 123#ifdef EV_STANDALONE
94void event_set_log_callback (event_log_cb cb) 124void event_set_log_callback (event_log_cb cb)
95{ 125{
… …
97} 127}
98#endif 128#endif
99 129
100int event_loop (int flags) 130int event_loop (int flags)
101{ 131{
102 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
103} 133}
104 134
105int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
106{ 136{
107 return event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
108} 138}
109 139
110static void 140static void
111x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
112{ 142{
143 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
144
145 ev->ev_res = revents;
146 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
147}
148
149static void
150ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
151{
152 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
153
154 if (revents & EV_ERROR)
155 event_del (ev);
156
157 ev_x_cb (ev, revents);
158}
159
160static void
161ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
162{
163 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
164
165 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
166 event_del (ev);
167
168 ev_x_cb (ev, revents);
169}
170
171static void
172ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
173{
174 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
175
176 event_del (ev);
177
178 ev_x_cb (ev, revents);
179}
180
181void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
182{
113 if (ev->ev_events & EV_SIGNAL) 183 if (events & EV_SIGNAL)
114 { 184 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 185 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); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
165 187
166 ev_watcher_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
167 189
168 ev->ev_base = x_cur; 190 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
169 ev->ev_fd = fd; 191 ev->ev_fd = fd;
170 ev->ev_events = events; 192 ev->ev_events = events;
171 ev->ev_pri = 0; 193 ev->ev_pri = 0;
172 ev->ev_callback = cb; 194 ev->ev_callback = cb;
173 ev->ev_arg = arg; 195 ev->ev_arg = arg;
174 ev->ev_res = 0; 196 ev->ev_res = 0;
197 ev->ev_flags = EVLIST_INIT;
175} 198}
176 199
177int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 200int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
178{ 201{
179 return event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
180} 203}
181 204
182int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
183{ 206{
184 /* disable all watchers */ 207 dLOOPev;
185 event_del (ev);
186 208
187 if (ev->ev_events & EV_SIGNAL) 209 if (ev->ev_events & EV_SIGNAL)
188 { 210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
189 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
190 ev_signal_start (&ev->iosig.sig); 214 ev_signal_start (EV_A_ &ev->iosig.sig);
191 ++x_actives; 215
216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
192 } 218 }
193 else if (ev->ev_events & (EV_READ | EV_WRITE)) 219 else if (ev->ev_events & (EV_READ | EV_WRITE))
194 { 220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
195 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 223 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
196 ev_io_start (&ev->iosig.io); 224 ev_io_start (EV_A_ &ev->iosig.io);
197 ++x_actives; 225
226 ev->ev_flags |= EVLIST_INSERTED;
227 }
198 } 228 }
199 229
200 if (tv) 230 if (tv)
201 { 231 {
202 ev_timer_set (&ev->to, tv_get (tv), 0.); 232 ev->to.repeat = ev_tv_get (tv);
233 ev_timer_again (EV_A_ &ev->to);
234 ev->ev_flags |= EVLIST_TIMEOUT;
235 }
236 else
237 {
203 ev_timer_start (&ev->to); 238 ev_timer_stop (EV_A_ &ev->to);
204 ++x_actives; 239 ev->ev_flags &= ~EVLIST_TIMEOUT;
205 } 240 }
241
242 ev->ev_flags |= EVLIST_ACTIVE;
206 243
207 return 0; 244 return 0;
208} 245}
209 246
210int event_del (struct event *ev) 247int event_del (struct event *ev)
211{ 248{
249 dLOOPev;
250
212 if (ev->ev_events & EV_SIGNAL) 251 if (ev->ev_events & EV_SIGNAL)
252 ev_signal_stop (EV_A_ &ev->iosig.sig);
253 else if (ev->ev_events & (EV_READ | EV_WRITE))
254 ev_io_stop (EV_A_ &ev->iosig.io);
255
256 if (ev_is_active (&ev->to))
257 ev_timer_stop (EV_A_ &ev->to);
258
259 ev->ev_flags = EVLIST_INIT;
260
261 return 0;
262}
263
264void event_active (struct event *ev, int res, short ncalls)
265{
266 dLOOPev;
267
268 if (res & EV_TIMEOUT)
269 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
270
271 if (res & EV_SIGNAL)
272 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
273
274 if (res & (EV_READ | EV_WRITE))
275 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
276}
277
278int event_pending (struct event *ev, short events, struct timeval *tv)
279{
280 short revents = 0;
281 dLOOPev;
282
283 if (ev->ev_events & EV_SIGNAL)
213 { 284 {
214 /* sig */ 285 /* sig */
215 if (ev_is_active (&ev->iosig.sig)) 286 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
216 { 287 revents |= EV_SIGNAL;
217 ev_signal_stop (&ev->iosig.sig);
218 --x_actives;
219 }
220 } 288 }
221 else 289 else if (ev->ev_events & (EV_READ | EV_WRITE))
222 { 290 {
223 /* io */ 291 /* io */
224 if (ev_is_active (&ev->iosig.io)) 292 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); 293 revents |= ev->ev_events & (EV_READ | EV_WRITE);
255 } 294 }
256 295
257 if (ev->to.pending) 296 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
258 { 297 {
259 revents |= EV_TIMEOUT; 298 revents |= EV_TIMEOUT;
260 299
261 if (tv) 300 if (tv)
262 tv_set (tv, ev_now); /* not sure if this is right :) */ 301 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
263 } 302 }
264 303
265 return events & revents; 304 return events & revents;
266} 305}
267 306
268int event_priority_init (int npri) 307int event_priority_init (int npri)
269{ 308{
270 return event_base_priority_init (x_cur, npri); 309 return event_base_priority_init (ev_x_cur, npri);
271} 310}
272 311
273int event_priority_set (struct event *ev, int pri) 312int event_priority_set (struct event *ev, int pri)
274{ 313{
275 ev->ev_pri = pri; 314 ev->ev_pri = pri;
… …
284 return 0; 323 return 0;
285} 324}
286 325
287int event_base_loop (struct event_base *base, int flags) 326int event_base_loop (struct event_base *base, int flags)
288{ 327{
289 do 328 dLOOPbase;
290 { 329
291 ev_loop (flags | EVLOOP_ONESHOT); 330 ev_loop (EV_A_ flags);
292 }
293 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
294 331
295 return 0; 332 return 0;
296} 333}
297 334
298int event_base_dispatch (struct event_base *base) 335int event_base_dispatch (struct event_base *base)
299{ 336{
300 return event_base_loop (base, 0); 337 return event_base_loop (base, 0);
301} 338}
302 339
303static void 340static void
304x_loopexit_cb (int revents, void *arg) 341ev_x_loopexit_cb (int revents, void *base)
305{ 342{
306 ev_loop_done = 2; 343 dLOOPbase;
344
345 ev_unloop (EV_A_ EVUNLOOP_ONE);
307} 346}
308 347
309int event_base_loopexit (struct event_base *base, struct timeval *tv) 348int event_base_loopexit (struct event_base *base, struct timeval *tv)
310{ 349{
311 ev_tstamp after = tv_get (tv); 350 ev_tstamp after = ev_tv_get (tv);
351 dLOOPbase;
312 352
313 ev_once (-1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 353 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
314 354
315 return -1; 355 return 0;
316} 356}
317 357
318struct x_once 358struct ev_x_once
319{ 359{
320 int fd; 360 int fd;
321 void (*cb)(int, short, void *); 361 void (*cb)(int, short, void *);
322 void *arg; 362 void *arg;
323}; 363};
324 364
325static void 365static void
326x_once_cb (int revents, void *arg) 366ev_x_once_cb (int revents, void *arg)
327{ 367{
328 struct x_once *once = arg; 368 struct ev_x_once *once = (struct ev_x_once *)arg;
329 369
330 once->cb (once->fd, revents, once->arg); 370 once->cb (once->fd, (short)revents, once->arg);
331 free (once); 371 free (once);
332} 372}
333 373
334int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 374int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
335{ 375{
336 struct x_once *once = malloc (sizeof (struct x_once)); 376 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
377 dLOOPbase;
337 378
338 if (!once) 379 if (!once)
339 return -1; 380 return -1;
340 381
341 once->fd = fd; 382 once->fd = fd;
342 once->cb = cb; 383 once->cb = cb;
343 once->arg = arg; 384 once->arg = arg;
344 385
345 ev_once (fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 386 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
346 387
347 return 0; 388 return 0;
348} 389}
349 390
350int event_base_priority_init (struct event_base *base, int npri) 391int event_base_priority_init (struct event_base *base, int npri)
351{ 392{
352 return 0; 393 /*dLOOPbase;*/
353}
354 394
395 return 0;
396}
397

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