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Comparing libev/event.c (file contents):
Revision 1.30 by root, Mon Nov 12 21:51:14 2007 UTC vs.
Revision 1.47 by root, Sun Oct 24 17:25:33 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"
… …
55struct event_base 59struct event_base
56{ 60{
57 int dummy; 61 int dummy;
58}; 62};
59 63
60static struct event_base *x_cur; 64static 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 65
69static ev_tstamp 66static ev_tstamp
70tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
71{ 68{
72 if (tv) 69 if (tv)
70 {
73 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 }
74 else 74 else
75 return -1.; 75 return -1.;
76} 76}
77 77
78#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)
79 80
80const char *event_get_version (void) 81const char *event_get_version (void)
81{ 82{
83 /* returns ABI, not API or library, version */
82 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 84 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
83} 85}
84 86
85const char *event_get_method (void) 87const char *event_get_method (void)
86{ 88{
… …
88} 90}
89 91
90void *event_init (void) 92void *event_init (void)
91{ 93{
92#if EV_MULTIPLICITY 94#if EV_MULTIPLICITY
93 if (x_cur) 95 if (ev_x_cur)
94 x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO); 96 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
95 else 97 else
96 x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO); 98 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
97#else 99#else
98 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));
99 101
100 x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO); 102 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
101#endif 103#endif
102 104
103 return x_cur; 105 return ev_x_cur;
104} 106}
105 107
106void event_base_free (struct event_base *base) 108void event_base_free (struct event_base *base)
107{ 109{
108 dLOOPbase; 110 dLOOPbase;
… …
113#endif 115#endif
114} 116}
115 117
116int event_dispatch (void) 118int event_dispatch (void)
117{ 119{
118 return event_base_dispatch (x_cur); 120 return event_base_dispatch (ev_x_cur);
119} 121}
120 122
121#ifdef EV_STANDALONE 123#ifdef EV_STANDALONE
122void event_set_log_callback (event_log_cb cb) 124void event_set_log_callback (event_log_cb cb)
123{ 125{
… …
125} 127}
126#endif 128#endif
127 129
128int event_loop (int flags) 130int event_loop (int flags)
129{ 131{
130 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
131} 133}
132 134
133int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
134{ 136{
135 return event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
136} 138}
137 139
138static void 140static void
139x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
140{ 142{
141 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 143 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
142 144
143 ev->ev_res = revents; 145 ev->ev_res = revents;
144 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg); 146 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
145} 147}
146 148
147static void 149static void
148x_cb_sig (EV_P_ struct ev_signal *w, int revents) 150ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
149{ 151{
150 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig)); 152 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
151 153
152 if (revents & EV_ERROR) 154 if (revents & EV_ERROR)
153 event_del (ev); 155 event_del (ev);
154 156
155 x_cb (ev, revents); 157 ev_x_cb (ev, revents);
156} 158}
157 159
158static void 160static void
159x_cb_io (EV_P_ struct ev_io *w, int revents) 161ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
160{ 162{
161 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));
162 164
163 if (revents & EV_ERROR) 165 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
164 event_del (ev); 166 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 }
170 167
171 x_cb (ev, revents); 168 ev_x_cb (ev, revents);
172} 169}
173 170
174static void 171static void
175x_cb_to (EV_P_ struct ev_timer *w, int revents) 172ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
176{ 173{
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 174 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178 175
179 event_del (ev); 176 event_del (ev);
180 177
181 x_cb (ev, revents); 178 ev_x_cb (ev, revents);
182} 179}
183 180
184void 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)
185{ 182{
186 if (events & EV_SIGNAL) 183 if (events & EV_SIGNAL)
187 ev_init (&ev->iosig.sig, x_cb_sig); 184 ev_init (&ev->iosig.sig, ev_x_cb_sig);
188 else 185 else
189 ev_init (&ev->iosig.io, x_cb_io); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
190 187
191 ev_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
192 189
193 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 */
194 ev->ev_fd = fd; 191 ev->ev_fd = fd;
195 ev->ev_events = events; 192 ev->ev_events = events;
196 ev->ev_pri = 0; 193 ev->ev_pri = 0;
197 ev->ev_callback = cb; 194 ev->ev_callback = cb;
198 ev->ev_arg = arg; 195 ev->ev_arg = arg;
… …
200 ev->ev_flags = EVLIST_INIT; 197 ev->ev_flags = EVLIST_INIT;
201} 198}
202 199
203int 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)
204{ 201{
205 return event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
206} 203}
207 204
208int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
209{ 206{
210 dLOOPev; 207 dLOOPev;
211 208
212 /* disable all watchers */
213 event_del (ev);
214
215 if (ev->ev_events & EV_SIGNAL) 209 if (ev->ev_events & EV_SIGNAL)
216 { 210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
217 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
218 ev_signal_start (EV_A_ &ev->iosig.sig); 214 ev_signal_start (EV_A_ &ev->iosig.sig);
219 215
220 ev->ev_flags |= EVLIST_SIGNAL; 216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
221 } 218 }
222 else if (ev->ev_events & (EV_READ | EV_WRITE)) 219 else if (ev->ev_events & (EV_READ | EV_WRITE))
223 { 220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
224 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));
225 ev_io_start (EV_A_ &ev->iosig.io); 224 ev_io_start (EV_A_ &ev->iosig.io);
226 225
227 ev->ev_flags |= EVLIST_INSERTED; 226 ev->ev_flags |= EVLIST_INSERTED;
227 }
228 } 228 }
229 229
230 if (tv) 230 if (tv)
231 { 231 {
232 ev_timer_set (&ev->to, tv_get (tv), 0.); 232 ev->to.repeat = ev_tv_get (tv);
233 ev_timer_start (EV_A_ &ev->to); 233 ev_timer_again (EV_A_ &ev->to);
234
235 ev->ev_flags |= EVLIST_TIMEOUT; 234 ev->ev_flags |= EVLIST_TIMEOUT;
236 } 235 }
236 else
237 {
238 ev_timer_stop (EV_A_ &ev->to);
239 ev->ev_flags &= ~EVLIST_TIMEOUT;
240 }
237 241
238 ev->ev_flags |= EVLIST_ACTIVE; 242 ev->ev_flags |= EVLIST_ACTIVE;
239 243
240 return 0; 244 return 0;
241} 245}
… …
243int event_del (struct event *ev) 247int event_del (struct event *ev)
244{ 248{
245 dLOOPev; 249 dLOOPev;
246 250
247 if (ev->ev_events & EV_SIGNAL) 251 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); 252 ev_signal_stop (EV_A_ &ev->iosig.sig);
252 }
253 else if (ev->ev_events & (EV_READ | EV_WRITE)) 253 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); 254 ev_io_stop (EV_A_ &ev->iosig.io);
258 }
259 255
260 if (ev_is_active (&ev->to)) 256 if (ev_is_active (&ev->to))
261 ev_timer_stop (EV_A_ &ev->to); 257 ev_timer_stop (EV_A_ &ev->to);
262 258
263 ev->ev_flags = EVLIST_INIT; 259 ev->ev_flags = EVLIST_INIT;
… …
281 277
282int event_pending (struct event *ev, short events, struct timeval *tv) 278int event_pending (struct event *ev, short events, struct timeval *tv)
283{ 279{
284 short revents = 0; 280 short revents = 0;
285 dLOOPev; 281 dLOOPev;
286
287 282
288 if (ev->ev_events & EV_SIGNAL) 283 if (ev->ev_events & EV_SIGNAL)
289 { 284 {
290 /* sig */ 285 /* sig */
291 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))
… …
301 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))
302 { 297 {
303 revents |= EV_TIMEOUT; 298 revents |= EV_TIMEOUT;
304 299
305 if (tv) 300 if (tv)
306 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 301 {
302 ev_tstamp at = ev_now (EV_A);
303
304 tv->tv_sec = (long)at;
305 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
306 }
307 } 307 }
308 308
309 return events & revents; 309 return events & revents;
310} 310}
311 311
312int event_priority_init (int npri) 312int event_priority_init (int npri)
313{ 313{
314 return event_base_priority_init (x_cur, npri); 314 return event_base_priority_init (ev_x_cur, npri);
315} 315}
316 316
317int event_priority_set (struct event *ev, int pri) 317int event_priority_set (struct event *ev, int pri)
318{ 318{
319 ev->ev_pri = pri; 319 ev->ev_pri = pri;
… …
330 330
331int event_base_loop (struct event_base *base, int flags) 331int event_base_loop (struct event_base *base, int flags)
332{ 332{
333 dLOOPbase; 333 dLOOPbase;
334 334
335 ev_loop (EV_A_ flags); 335 ev_run (EV_A_ flags);
336 336
337 return 0; 337 return 0;
338} 338}
339 339
340int event_base_dispatch (struct event_base *base) 340int event_base_dispatch (struct event_base *base)
341{ 341{
342 return event_base_loop (base, 0); 342 return event_base_loop (base, 0);
343} 343}
344 344
345static void 345static void
346x_loopexit_cb (int revents, void *base) 346ev_x_loopexit_cb (int revents, void *base)
347{ 347{
348 dLOOPbase; 348 dLOOPbase;
349 349
350 ev_unloop (EV_A_ EVUNLOOP_ONE); 350 ev_break (EV_A_ EVBREAK_ONE);
351} 351}
352 352
353int event_base_loopexit (struct event_base *base, struct timeval *tv) 353int event_base_loopexit (struct event_base *base, struct timeval *tv)
354{ 354{
355 ev_tstamp after = tv_get (tv); 355 ev_tstamp after = ev_tv_get (tv);
356 dLOOPbase; 356 dLOOPbase;
357 357
358 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 358 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
359 359
360 return -1; 360 return 0;
361} 361}
362 362
363struct x_once 363struct ev_x_once
364{ 364{
365 int fd; 365 int fd;
366 void (*cb)(int, short, void *); 366 void (*cb)(int, short, void *);
367 void *arg; 367 void *arg;
368}; 368};
369 369
370static void 370static void
371x_once_cb (int revents, void *arg) 371ev_x_once_cb (int revents, void *arg)
372{ 372{
373 struct x_once *once = (struct x_once *)arg; 373 struct ev_x_once *once = (struct ev_x_once *)arg;
374 374
375 once->cb (once->fd, (short)revents, once->arg); 375 once->cb (once->fd, (short)revents, once->arg);
376 free (once); 376 free (once);
377} 377}
378 378
379int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 379int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
380{ 380{
381 struct x_once *once = (struct x_once *)malloc (sizeof (struct x_once)); 381 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
382 dLOOPbase; 382 dLOOPbase;
383 383
384 if (!once) 384 if (!once)
385 return -1; 385 return -1;
386 386
387 once->fd = fd; 387 once->fd = fd;
388 once->cb = cb; 388 once->cb = cb;
389 once->arg = arg; 389 once->arg = arg;
390 390
391 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 391 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
392 392
393 return 0; 393 return 0;
394} 394}
395 395
396int event_base_priority_init (struct event_base *base, int npri) 396int event_base_priority_init (struct event_base *base, int npri)

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