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Comparing libev/event.c (file contents):
Revision 1.15 by root, Sun Nov 4 20:38:07 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>
35#include <assert.h> 42#include <assert.h>
36 43
37#include "ev.h" 44#ifdef EV_EVENT_H
45# include EV_EVENT_H
46#else
38#include "event.h" 47# include "event.h"
48#endif
39 49
40#if EV_MULTIPLICITY 50#if EV_MULTIPLICITY
41# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base 51# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
42# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base 52# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
43#else 53#else
… …
49struct event_base 59struct event_base
50{ 60{
51 int dummy; 61 int dummy;
52}; 62};
53 63
54static struct event_base *x_cur; 64static struct event_base *ev_x_cur;
55
56static void
57tv_set (struct timeval *tv, ev_tstamp at)
58{
59 tv->tv_sec = (long)at;
60 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
61}
62 65
63static ev_tstamp 66static ev_tstamp
64tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
65{ 68{
66 if (tv) 69 if (tv)
70 {
67 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 }
68 else 74 else
69 return -1.; 75 return -1.;
70} 76}
71 77
72#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)
73 80
74const char *event_get_version (void) 81const char *event_get_version (void)
75{ 82{
83 /* returns ABI, not API or library, version */
76 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 84 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
77} 85}
78 86
79const char *event_get_method (void) 87const char *event_get_method (void)
80{ 88{
… …
82} 90}
83 91
84void *event_init (void) 92void *event_init (void)
85{ 93{
86#if EV_MULTIPLICITY 94#if EV_MULTIPLICITY
87 if (x_cur) 95 if (ev_x_cur)
88 x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO); 96 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
89 else 97 else
90 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 98 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
91#else 99#else
92 assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur)); 100 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
93 101
94 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 102 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
95#endif 103#endif
96 104
97 return x_cur; 105 return ev_x_cur;
98} 106}
99 107
100void event_base_free (struct event_base *base) 108void event_base_free (struct event_base *base)
101{ 109{
102 dLOOPbase; 110 dLOOPbase;
103 111
104#if EV_MULTIPLICITY 112#if EV_MULTIPLICITY
105 if (ev_default_loop (EVMETHOD_AUTO) != loop) 113 if (ev_default_loop (EVFLAG_AUTO) != loop)
106 ev_loop_destroy (loop); 114 ev_loop_destroy (loop);
107#endif 115#endif
108} 116}
109 117
110int event_dispatch (void) 118int event_dispatch (void)
111{ 119{
112 return event_base_dispatch (x_cur); 120 return event_base_dispatch (ev_x_cur);
113} 121}
114 122
115#ifdef EV_STANDALONE 123#ifdef EV_STANDALONE
116void event_set_log_callback (event_log_cb cb) 124void event_set_log_callback (event_log_cb cb)
117{ 125{
… …
119} 127}
120#endif 128#endif
121 129
122int event_loop (int flags) 130int event_loop (int flags)
123{ 131{
124 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
125} 133}
126 134
127int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
128{ 136{
129 return event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
130} 138}
131 139
132static void 140static void
133x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
134{ 142{
135 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 143 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
136 144
137 ev->ev_res = revents; 145 ev->ev_res = revents;
138 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 146 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
139} 147}
140 148
141static void 149static void
142x_cb_sig (EV_P_ struct ev_signal *w, int revents) 150ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
143{ 151{
144 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); 152 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
145}
146 153
154 if (revents & EV_ERROR)
155 event_del (ev);
156
157 ev_x_cb (ev, revents);
158}
159
147static void 160static void
148x_cb_io (EV_P_ struct ev_io *w, int revents) 161ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
149{ 162{
150 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 163 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
151 164
152 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 165 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
153 ev_io_stop (EV_A_ w); 166 event_del (ev);
154 167
155 x_cb (ev, revents); 168 ev_x_cb (ev, revents);
156} 169}
157 170
158static void 171static void
159x_cb_to (EV_P_ struct ev_timer *w, int revents) 172ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
160{ 173{
161 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 174 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
162 175
163 event_del (ev); 176 event_del (ev);
164 177
165 x_cb (ev, revents); 178 ev_x_cb (ev, revents);
166} 179}
167 180
168void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 181void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
169{ 182{
170 printf ("event set %p\n", ev);//D
171 if (events & EV_SIGNAL) 183 if (events & EV_SIGNAL)
172 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 184 ev_init (&ev->iosig.sig, ev_x_cb_sig);
173 else 185 else
174 ev_watcher_init (&ev->iosig.io, x_cb_io); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
175 187
176 ev_watcher_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
177 189
178 ev->ev_base = x_cur; /* not threadsafe, but its like libevent works */ 190 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
179 ev->ev_fd = fd; 191 ev->ev_fd = fd;
180 ev->ev_events = events; 192 ev->ev_events = events;
181 ev->ev_pri = 0; 193 ev->ev_pri = 0;
182 ev->ev_callback = cb; 194 ev->ev_callback = cb;
183 ev->ev_arg = arg; 195 ev->ev_arg = arg;
184 ev->ev_res = 0; 196 ev->ev_res = 0;
197 ev->ev_flags = EVLIST_INIT;
185} 198}
186 199
187int 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)
188{ 201{
189 return event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
190} 203}
191 204
192int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
193{ 206{
194 printf ("event add %p %p\n", ev, &ev->to);//D
195 dLOOPev; 207 dLOOPev;
196 208
197 /* disable all watchers */
198 event_del (ev);
199
200 if (ev->ev_events & EV_SIGNAL) 209 if (ev->ev_events & EV_SIGNAL)
201 { 210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
202 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
203 ev_signal_start (EV_A_ &ev->iosig.sig); 214 ev_signal_start (EV_A_ &ev->iosig.sig);
215
216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
204 } 218 }
205 else if (ev->ev_events & (EV_READ | EV_WRITE)) 219 else if (ev->ev_events & (EV_READ | EV_WRITE))
206 { 220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
207 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));
208 ev_io_start (EV_A_ &ev->iosig.io); 224 ev_io_start (EV_A_ &ev->iosig.io);
225
226 ev->ev_flags |= EVLIST_INSERTED;
227 }
209 } 228 }
210 229
211 if (tv) 230 if (tv)
212 { 231 {
213 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 {
214 ev_timer_start (EV_A_ &ev->to); 238 ev_timer_stop (EV_A_ &ev->to);
239 ev->ev_flags &= ~EVLIST_TIMEOUT;
215 } 240 }
241
242 ev->ev_flags |= EVLIST_ACTIVE;
216 243
217 return 0; 244 return 0;
218} 245}
219 246
220int event_del (struct event *ev) 247int event_del (struct event *ev)
221{ 248{
222 printf ("event del %p\n", ev);//D
223 dLOOPev; 249 dLOOPev;
224 250
225 if (ev->ev_events & EV_SIGNAL) 251 if (ev->ev_events & EV_SIGNAL)
226 {
227 /* sig */
228 if (ev_is_active (&ev->iosig.sig))
229 ev_signal_stop (EV_A_ &ev->iosig.sig); 252 ev_signal_stop (EV_A_ &ev->iosig.sig);
230 } 253 else if (ev->ev_events & (EV_READ | EV_WRITE))
231 else
232 {
233 /* io */
234 if (ev_is_active (&ev->iosig.io))
235 ev_io_stop (EV_A_ &ev->iosig.io); 254 ev_io_stop (EV_A_ &ev->iosig.io);
236 }
237 255
238 printf ("to %p %d\n", &ev->to, ev->to.active);//D
239 if (ev_is_active (&ev->to)) 256 if (ev_is_active (&ev->to))
240 ev_timer_stop (EV_A_ &ev->to); 257 ev_timer_stop (EV_A_ &ev->to);
241 258
259 ev->ev_flags = EVLIST_INIT;
260
242 return 0; 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));
243} 276}
244 277
245int event_pending (struct event *ev, short events, struct timeval *tv) 278int event_pending (struct event *ev, short events, struct timeval *tv)
246{ 279{
280 short revents = 0;
247 dLOOPev; 281 dLOOPev;
248
249 short revents = 0;
250 282
251 if (ev->ev_events & EV_SIGNAL) 283 if (ev->ev_events & EV_SIGNAL)
252 { 284 {
253 /* sig */ 285 /* sig */
254 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) 286 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
255 revents |= EV_SIGNAL; 287 revents |= EV_SIGNAL;
256 } 288 }
257 else 289 else if (ev->ev_events & (EV_READ | EV_WRITE))
258 { 290 {
259 /* io */ 291 /* io */
260 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io)) 292 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
261 revents |= ev->ev_events & (EV_READ | EV_WRITE); 293 revents |= ev->ev_events & (EV_READ | EV_WRITE);
262 } 294 }
… …
264 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) 296 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
265 { 297 {
266 revents |= EV_TIMEOUT; 298 revents |= EV_TIMEOUT;
267 299
268 if (tv) 300 if (tv)
269 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 301 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
270 } 302 }
271 303
272 return events & revents; 304 return events & revents;
273} 305}
274 306
275int event_priority_init (int npri) 307int event_priority_init (int npri)
276{ 308{
277 return event_base_priority_init (x_cur, npri); 309 return event_base_priority_init (ev_x_cur, npri);
278} 310}
279 311
280int event_priority_set (struct event *ev, int pri) 312int event_priority_set (struct event *ev, int pri)
281{ 313{
282 ev->ev_pri = pri; 314 ev->ev_pri = pri;
… …
304{ 336{
305 return event_base_loop (base, 0); 337 return event_base_loop (base, 0);
306} 338}
307 339
308static void 340static void
309x_loopexit_cb (int revents, void *base) 341ev_x_loopexit_cb (int revents, void *base)
310{ 342{
311 dLOOPbase; 343 dLOOPbase;
312 344
313 ev_unloop (EV_A_ EVUNLOOP_ONCE); 345 ev_unloop (EV_A_ EVUNLOOP_ONE);
314} 346}
315 347
316int event_base_loopexit (struct event_base *base, struct timeval *tv) 348int event_base_loopexit (struct event_base *base, struct timeval *tv)
317{ 349{
318 dLOOPbase;
319 ev_tstamp after = tv_get (tv); 350 ev_tstamp after = ev_tv_get (tv);
351 dLOOPbase;
320 352
321 ev_once (EV_A_ -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);
322 354
323 return -1; 355 return 0;
324} 356}
325 357
326struct x_once 358struct ev_x_once
327{ 359{
328 int fd; 360 int fd;
329 void (*cb)(int, short, void *); 361 void (*cb)(int, short, void *);
330 void *arg; 362 void *arg;
331}; 363};
332 364
333static void 365static void
334x_once_cb (int revents, void *arg) 366ev_x_once_cb (int revents, void *arg)
335{ 367{
336 struct x_once *once = arg; 368 struct ev_x_once *once = (struct ev_x_once *)arg;
337 369
338 once->cb (once->fd, revents, once->arg); 370 once->cb (once->fd, (short)revents, once->arg);
339 free (once); 371 free (once);
340} 372}
341 373
342int 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)
343{ 375{
344 dLOOPbase;
345 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;
346 378
347 if (!once) 379 if (!once)
348 return -1; 380 return -1;
349 381
350 once->fd = fd; 382 once->fd = fd;
351 once->cb = cb; 383 once->cb = cb;
352 once->arg = arg; 384 once->arg = arg;
353 385
354 ev_once (EV_A_ 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);
355 387
356 return 0; 388 return 0;
357} 389}
358 390
359int event_base_priority_init (struct event_base *base, int npri) 391int event_base_priority_init (struct event_base *base, int npri)

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