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Comparing libev/event.c (file contents):
Revision 1.29 by root, Mon Nov 12 08:00:28 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 <assert.h> 42#include <assert.h>
35
36#ifndef WIN32
37# include <sys/time.h>
38#endif
39 43
40#ifdef EV_EVENT_H 44#ifdef EV_EVENT_H
41# include EV_EVENT_H 45# include EV_EVENT_H
42#else 46#else
43# include "event.h" 47# include "event.h"
44#endif 48#endif
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)
45 52
46#if EV_MULTIPLICITY 53#if EV_MULTIPLICITY
47# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base 54# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
48# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base 55# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
49#else 56#else
… …
55struct event_base 62struct event_base
56{ 63{
57 int dummy; 64 int dummy;
58}; 65};
59 66
60static struct event_base *x_cur; 67static struct event_base *ev_x_cur;
61
62static void
63tv_set (struct timeval *tv, ev_tstamp at)
64{
65 tv->tv_sec = (long)at;
66 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
67}
68 68
69static ev_tstamp 69static ev_tstamp
70tv_get (struct timeval *tv) 70ev_tv_get (struct timeval *tv)
71{ 71{
72 if (tv) 72 if (tv)
73 {
73 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 }
74 else 77 else
75 return -1.; 78 return -1.;
76} 79}
77 80
78#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)
79 83
80const char *event_get_version (void) 84const char *event_get_version (void)
81{ 85{
86 /* returns ABI, not API or library, version */
82 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 87 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
83} 88}
84 89
85const char *event_get_method (void) 90const char *event_get_method (void)
86{ 91{
… …
88} 93}
89 94
90void *event_init (void) 95void *event_init (void)
91{ 96{
92#if EV_MULTIPLICITY 97#if EV_MULTIPLICITY
93 if (x_cur) 98 if (ev_x_cur)
94 x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO); 99 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
95 else 100 else
96 x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO); 101 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
97#else 102#else
98 assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur)); 103 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
99 104
100 x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO); 105 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
101#endif 106#endif
102 107
103 return x_cur; 108 return ev_x_cur;
104} 109}
105 110
106void event_base_free (struct event_base *base) 111void event_base_free (struct event_base *base)
107{ 112{
108 dLOOPbase; 113 dLOOPbase;
… …
113#endif 118#endif
114} 119}
115 120
116int event_dispatch (void) 121int event_dispatch (void)
117{ 122{
118 return event_base_dispatch (x_cur); 123 return event_base_dispatch (ev_x_cur);
119} 124}
120 125
121#ifdef EV_STANDALONE 126#ifdef EV_STANDALONE
122void event_set_log_callback (event_log_cb cb) 127void event_set_log_callback (event_log_cb cb)
123{ 128{
… …
125} 130}
126#endif 131#endif
127 132
128int event_loop (int flags) 133int event_loop (int flags)
129{ 134{
130 return event_base_loop (x_cur, flags); 135 return event_base_loop (ev_x_cur, flags);
131} 136}
132 137
133int event_loopexit (struct timeval *tv) 138int event_loopexit (struct timeval *tv)
134{ 139{
135 return event_base_loopexit (x_cur, tv); 140 return event_base_loopexit (ev_x_cur, tv);
136} 141}
137 142
138static void 143static void
139x_cb (struct event *ev, int revents) 144ev_x_cb (struct event *ev, int revents)
140{ 145{
141 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 146 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
142 147
143 ev->ev_res = revents; 148 ev->ev_res = revents;
144 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg); 149 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
145} 150}
146 151
147static void 152static void
148x_cb_sig (EV_P_ struct ev_signal *w, int revents) 153ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
149{ 154{
150 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig)); 155 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
151 156
152 if (revents & EV_ERROR) 157 if (revents & EV_ERROR)
153 event_del (ev); 158 event_del (ev);
154 159
155 x_cb (ev, revents); 160 ev_x_cb (ev, revents);
156} 161}
157 162
158static void 163static void
159x_cb_io (EV_P_ struct ev_io *w, int revents) 164ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
160{ 165{
161 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); 166 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
162 167
163 if (revents & EV_ERROR) 168 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
164 event_del (ev); 169 event_del (ev);
165 else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
166 {
167 ev_io_stop (EV_A_ w);
168 ev->ev_flags &= ~EVLIST_INSERTED;
169 }
170 170
171 x_cb (ev, revents); 171 ev_x_cb (ev, revents);
172} 172}
173 173
174static void 174static void
175x_cb_to (EV_P_ struct ev_timer *w, int revents) 175ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
176{ 176{
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178 178
179 event_del (ev); 179 event_del (ev);
180 180
181 x_cb (ev, revents); 181 ev_x_cb (ev, revents);
182} 182}
183 183
184void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) 184void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
185{ 185{
186 if (events & EV_SIGNAL) 186 if (events & EV_SIGNAL)
187 ev_init (&ev->iosig.sig, x_cb_sig); 187 ev_init (&ev->iosig.sig, ev_x_cb_sig);
188 else 188 else
189 ev_init (&ev->iosig.io, x_cb_io); 189 ev_init (&ev->iosig.io, ev_x_cb_io);
190 190
191 ev_init (&ev->to, x_cb_to); 191 ev_init (&ev->to, ev_x_cb_to);
192 192
193 ev->ev_base = x_cur; /* not threadsafe, but its like libevent works */ 193 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
194 ev->ev_fd = fd; 194 ev->ev_fd = fd;
195 ev->ev_events = events; 195 ev->ev_events = events;
196 ev->ev_pri = 0; 196 ev->ev_pri = 0;
197 ev->ev_callback = cb; 197 ev->ev_callback = cb;
198 ev->ev_arg = arg; 198 ev->ev_arg = arg;
… …
200 ev->ev_flags = EVLIST_INIT; 200 ev->ev_flags = EVLIST_INIT;
201} 201}
202 202
203int 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)
204{ 204{
205 return event_base_once (x_cur, fd, events, cb, arg, tv); 205 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
206} 206}
207 207
208int event_add (struct event *ev, struct timeval *tv) 208int event_add (struct event *ev, struct timeval *tv)
209{ 209{
210 dLOOPev; 210 dLOOPev;
211 211
212 /* disable all watchers */
213 event_del (ev);
214
215 if (ev->ev_events & EV_SIGNAL) 212 if (ev->ev_events & EV_SIGNAL)
216 { 213 {
214 if (!ev_is_active (&ev->iosig.sig))
215 {
217 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 216 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
218 ev_signal_start (EV_A_ &ev->iosig.sig); 217 ev_signal_start (EV_A_ &ev->iosig.sig);
219 218
220 ev->ev_flags |= EVLIST_SIGNAL; 219 ev->ev_flags |= EVLIST_SIGNAL;
220 }
221 } 221 }
222 else if (ev->ev_events & (EV_READ | EV_WRITE)) 222 else if (ev->ev_events & (EV_READ | EV_WRITE))
223 { 223 {
224 if (!ev_is_active (&ev->iosig.io))
225 {
224 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));
225 ev_io_start (EV_A_ &ev->iosig.io); 227 ev_io_start (EV_A_ &ev->iosig.io);
226 228
227 ev->ev_flags |= EVLIST_INSERTED; 229 ev->ev_flags |= EVLIST_INSERTED;
230 }
228 } 231 }
229 232
230 if (tv) 233 if (tv)
231 { 234 {
232 ev_timer_set (&ev->to, tv_get (tv), 0.); 235 ev->to.repeat = ev_tv_get (tv);
233 ev_timer_start (EV_A_ &ev->to); 236 ev_timer_again (EV_A_ &ev->to);
234
235 ev->ev_flags |= EVLIST_TIMEOUT; 237 ev->ev_flags |= EVLIST_TIMEOUT;
236 } 238 }
239 else
240 {
241 ev_timer_stop (EV_A_ &ev->to);
242 ev->ev_flags &= ~EVLIST_TIMEOUT;
243 }
237 244
238 ev->ev_flags |= EVLIST_ACTIVE; 245 ev->ev_flags |= EVLIST_ACTIVE;
239 246
240 return 0; 247 return 0;
241} 248}
… …
243int event_del (struct event *ev) 250int event_del (struct event *ev)
244{ 251{
245 dLOOPev; 252 dLOOPev;
246 253
247 if (ev->ev_events & EV_SIGNAL) 254 if (ev->ev_events & EV_SIGNAL)
248 {
249 /* sig */
250 if (ev_is_active (&ev->iosig.sig))
251 ev_signal_stop (EV_A_ &ev->iosig.sig); 255 ev_signal_stop (EV_A_ &ev->iosig.sig);
252 }
253 else if (ev->ev_events & (EV_READ | EV_WRITE)) 256 else if (ev->ev_events & (EV_READ | EV_WRITE))
254 {
255 /* io */
256 if (ev_is_active (&ev->iosig.io))
257 ev_io_stop (EV_A_ &ev->iosig.io); 257 ev_io_stop (EV_A_ &ev->iosig.io);
258 }
259 258
260 if (ev_is_active (&ev->to)) 259 if (ev_is_active (&ev->to))
261 ev_timer_stop (EV_A_ &ev->to); 260 ev_timer_stop (EV_A_ &ev->to);
262 261
263 ev->ev_flags = EVLIST_INIT; 262 ev->ev_flags = EVLIST_INIT;
… …
281 280
282int event_pending (struct event *ev, short events, struct timeval *tv) 281int event_pending (struct event *ev, short events, struct timeval *tv)
283{ 282{
284 short revents = 0; 283 short revents = 0;
285 dLOOPev; 284 dLOOPev;
286
287 285
288 if (ev->ev_events & EV_SIGNAL) 286 if (ev->ev_events & EV_SIGNAL)
289 { 287 {
290 /* sig */ 288 /* sig */
291 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) 289 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
… …
301 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) 299 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
302 { 300 {
303 revents |= EV_TIMEOUT; 301 revents |= EV_TIMEOUT;
304 302
305 if (tv) 303 if (tv)
306 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 304 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
307 } 305 }
308 306
309 return events & revents; 307 return events & revents;
310} 308}
311 309
312int event_priority_init (int npri) 310int event_priority_init (int npri)
313{ 311{
314 return event_base_priority_init (x_cur, npri); 312 return event_base_priority_init (ev_x_cur, npri);
315} 313}
316 314
317int event_priority_set (struct event *ev, int pri) 315int event_priority_set (struct event *ev, int pri)
318{ 316{
319 ev->ev_pri = pri; 317 ev->ev_pri = pri;
… …
330 328
331int event_base_loop (struct event_base *base, int flags) 329int event_base_loop (struct event_base *base, int flags)
332{ 330{
333 dLOOPbase; 331 dLOOPbase;
334 332
335 ev_loop (EV_A_ flags); 333 ev_run (EV_A_ flags);
336 334
337 return 0; 335 return 0;
338} 336}
339 337
340int event_base_dispatch (struct event_base *base) 338int event_base_dispatch (struct event_base *base)
341{ 339{
342 return event_base_loop (base, 0); 340 return event_base_loop (base, 0);
343} 341}
344 342
345static void 343static void
346x_loopexit_cb (int revents, void *base) 344ev_x_loopexit_cb (int revents, void *base)
347{ 345{
348 dLOOPbase; 346 dLOOPbase;
349 347
350 ev_unloop (EV_A_ EVUNLOOP_ONCE); 348 ev_break (EV_A_ EVBREAK_ONE);
351} 349}
352 350
353int event_base_loopexit (struct event_base *base, struct timeval *tv) 351int event_base_loopexit (struct event_base *base, struct timeval *tv)
354{ 352{
355 ev_tstamp after = tv_get (tv); 353 ev_tstamp after = ev_tv_get (tv);
356 dLOOPbase; 354 dLOOPbase;
357 355
358 ev_once (EV_A_ -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);
359 357
360 return -1; 358 return 0;
361} 359}
362 360
363struct x_once 361struct ev_x_once
364{ 362{
365 int fd; 363 int fd;
366 void (*cb)(int, short, void *); 364 void (*cb)(int, short, void *);
367 void *arg; 365 void *arg;
368}; 366};
369 367
370static void 368static void
371x_once_cb (int revents, void *arg) 369ev_x_once_cb (int revents, void *arg)
372{ 370{
373 struct x_once *once = (struct x_once *)arg; 371 struct ev_x_once *once = (struct ev_x_once *)arg;
374 372
375 once->cb (once->fd, (short)revents, once->arg); 373 once->cb (once->fd, (short)revents, once->arg);
376 free (once); 374 free (once);
377} 375}
378 376
379int 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)
380{ 378{
381 struct x_once *once = (struct x_once *)malloc (sizeof (struct x_once)); 379 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
382 dLOOPbase; 380 dLOOPbase;
383 381
384 if (!once) 382 if (!once)
385 return -1; 383 return -1;
386 384
387 once->fd = fd; 385 once->fd = fd;
388 once->cb = cb; 386 once->cb = cb;
389 once->arg = arg; 387 once->arg = arg;
390 388
391 ev_once (EV_A_ 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);
392 390
393 return 0; 391 return 0;
394} 392}
395 393
396int event_base_priority_init (struct event_base *base, int npri) 394int event_base_priority_init (struct event_base *base, int npri)

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