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Comparing libev/event.c (file contents):
Revision 1.4 by root, Fri Nov 2 13:08:51 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 <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{
110 dLOOPbase;
111
112#if EV_MULTIPLICITY
113 if (ev_default_loop (EVFLAG_AUTO) != loop)
114 ev_loop_destroy (loop);
115#endif
116}
117
118int event_dispatch (void)
119{
120 return event_base_dispatch (ev_x_cur);
121}
122
123#ifdef EV_STANDALONE
124void event_set_log_callback (event_log_cb cb)
125{
85 /* nop */ 126 /* nop */
86} 127}
87 128#endif
88int event_dispatch (void)
89{
90 return event_base_dispatch (x_cur);
91}
92
93void event_set_log_callback (event_log_cb cb)
94{
95 /* nop */
96}
97 129
98int event_loop (int flags) 130int event_loop (int flags)
99{ 131{
100 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
101} 133}
102 134
103int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
104{ 136{
105 event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
106} 138}
107 139
108static void 140static void
109x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
110{ 142{
143 revents &= EV_READ | EV_WRITE | EV_TIMER | 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{
111 if (ev->ev_events & EV_SIGNAL) 183 if (events & EV_SIGNAL)
112 { 184 ev_init (&ev->iosig.sig, ev_x_cb_sig);
113 /* sig */
114 if (ev_is_active (&ev->iosig.sig))
115 {
116 ev_signal_stop (&ev->iosig.sig);
117 --x_actives;
118 }
119 }
120 else 185 else
121 {
122 /* io */
123 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (&ev->iosig.io))
124 {
125 ev_io_stop (&ev->iosig.io);
126 --x_actives;
127 }
128 }
129
130 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
131
132 if (revents & EV_TIMEOUT)
133 --x_actives;
134
135 ev->ev_res = revents;
136 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg);
137}
138
139static void
140x_cb_io (struct ev_io *w, int revents)
141{
142 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.io)), revents);
143}
144
145static void
146x_cb_to (struct ev_timer *w, int revents)
147{
148 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents);
149}
150
151static void
152x_cb_sig (struct ev_signal *w, int revents)
153{
154 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents);
155}
156
157void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
158{
159 if (events & EV_SIGNAL)
160 ev_watcher_init (&ev->iosig.sig, x_cb_sig);
161 else
162 ev_watcher_init (&ev->iosig.io, x_cb_io); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
163 187
164 ev_watcher_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
165 189
166 ev->ev_base = x_cur; 190 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
167 ev->ev_fd = fd; 191 ev->ev_fd = fd;
168 ev->ev_events = events; 192 ev->ev_events = events;
169 ev->ev_pri = 0; 193 ev->ev_pri = 0;
170 ev->ev_callback = cb; 194 ev->ev_callback = cb;
171 ev->ev_arg = arg; 195 ev->ev_arg = arg;
172 ev->ev_res = 0; 196 ev->ev_res = 0;
197 ev->ev_flags = EVLIST_INIT;
173} 198}
174 199
175int 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)
176{ 201{
177 event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
178} 203}
179 204
180int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
181{ 206{
182 /* disable all watchers */ 207 dLOOPev;
183 event_del (ev);
184 208
185 if (ev->ev_events & EV_SIGNAL) 209 if (ev->ev_events & EV_SIGNAL)
186 { 210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
187 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
188 ev_signal_start (&ev->iosig.sig); 214 ev_signal_start (EV_A_ &ev->iosig.sig);
189 ++x_actives; 215
216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
190 } 218 }
191 else if (ev->ev_events & (EV_READ | EV_WRITE)) 219 else if (ev->ev_events & (EV_READ | EV_WRITE))
192 { 220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
193 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));
194 ev_io_start (&ev->iosig.io); 224 ev_io_start (EV_A_ &ev->iosig.io);
195 ++x_actives; 225
226 ev->ev_flags |= EVLIST_INSERTED;
227 }
196 } 228 }
197 229
198 if (tv) 230 if (tv)
199 { 231 {
200 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 {
201 ev_timer_start (&ev->to); 238 ev_timer_stop (EV_A_ &ev->to);
202 ++x_actives; 239 ev->ev_flags &= ~EVLIST_TIMEOUT;
203 } 240 }
241
242 ev->ev_flags |= EVLIST_ACTIVE;
204 243
205 return 0; 244 return 0;
206} 245}
207 246
208int event_del (struct event *ev) 247int event_del (struct event *ev)
209{ 248{
249 dLOOPev;
250
210 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)
211 { 284 {
212 /* sig */ 285 /* sig */
213 if (ev_is_active (&ev->iosig.sig)) 286 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
287 revents |= EV_SIGNAL;
288 }
289 else if (ev->ev_events & (EV_READ | EV_WRITE))
290 {
291 /* io */
292 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
293 revents |= ev->ev_events & (EV_READ | EV_WRITE);
294 }
295
296 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
297 {
298 revents |= EV_TIMEOUT;
299
300 if (tv)
214 { 301 {
215 ev_signal_stop (&ev->iosig.sig); 302 ev_tstamp at = ev_now (EV_A);
216 --x_actives; 303
304 tv->tv_sec = (long)at;
305 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
217 } 306 }
218 } 307 }
219 else
220 {
221 /* io */
222 if (ev_is_active (&ev->iosig.io))
223 {
224 ev_io_stop (&ev->iosig.io);
225 --x_actives;
226 }
227 }
228
229 if (ev_is_active (&ev->to))
230 {
231 ev_timer_stop (&ev->to);
232 --x_actives;
233 }
234
235 return 0;
236}
237
238int event_pending (struct event *ev, short events, struct timeval *tv)
239{
240 short revents;
241
242 if (ev->ev_events & EV_SIGNAL)
243 {
244 /* sig */
245 if (ev->iosig.sig.pending)
246 revents |= EV_SIGNAL;
247 }
248 else
249 {
250 /* io */
251 if (ev->iosig.io.pending)
252 revents |= ev->ev_events & (EV_READ | EV_WRITE);
253 }
254
255 if (ev->to.pending)
256 {
257 revents |= EV_TIMEOUT;
258
259 if (tv)
260 tv_set (tv, ev_now); /* not sure if this is right :) */
261 }
262 308
263 return events & revents; 309 return events & revents;
264} 310}
265 311
266int event_priority_init (int npri) 312int event_priority_init (int npri)
267{ 313{
268 return event_base_priority_init (x_cur, npri); 314 return event_base_priority_init (ev_x_cur, npri);
269} 315}
270 316
271int event_priority_set (struct event *ev, int pri) 317int event_priority_set (struct event *ev, int pri)
272{ 318{
273 ev->ev_pri = pri; 319 ev->ev_pri = pri;
… …
282 return 0; 328 return 0;
283} 329}
284 330
285int event_base_loop (struct event_base *base, int flags) 331int event_base_loop (struct event_base *base, int flags)
286{ 332{
287 do 333 dLOOPbase;
288 { 334
289 ev_loop (flags | EVLOOP_ONESHOT); 335 ev_run (EV_A_ flags);
290 }
291 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
292 336
293 return 0; 337 return 0;
294} 338}
295 339
296int event_base_dispatch (struct event_base *base) 340int event_base_dispatch (struct event_base *base)
297{ 341{
298 return event_base_loop (base, 0); 342 return event_base_loop (base, 0);
299} 343}
300 344
301static void 345static void
302x_loopexit_cb (int revents, void *arg) 346ev_x_loopexit_cb (int revents, void *base)
303{ 347{
304 ev_loop_done = 2; 348 dLOOPbase;
349
350 ev_break (EV_A_ EVBREAK_ONE);
305} 351}
306 352
307int event_base_loopexit (struct event_base *base, struct timeval *tv) 353int event_base_loopexit (struct event_base *base, struct timeval *tv)
308{ 354{
309 ev_tstamp after = tv_get (tv); 355 ev_tstamp after = ev_tv_get (tv);
356 dLOOPbase;
310 357
311 ev_once (-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);
312}
313 359
360 return 0;
361}
362
314struct x_once 363struct ev_x_once
315{ 364{
316 int fd; 365 int fd;
317 void (*cb)(int, short, void *); 366 void (*cb)(int, short, void *);
318 void *arg; 367 void *arg;
319}; 368};
320 369
321static void 370static void
322x_once_cb (int revents, void *arg) 371ev_x_once_cb (int revents, void *arg)
323{ 372{
324 struct x_once *once = arg; 373 struct ev_x_once *once = (struct ev_x_once *)arg;
325 374
326 once->cb (once->fd, revents, once->arg); 375 once->cb (once->fd, (short)revents, once->arg);
327 free (once); 376 free (once);
328} 377}
329 378
330int 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)
331{ 380{
332 struct x_once *once = malloc (sizeof (struct x_once)); 381 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
382 dLOOPbase;
333 383
334 if (!once) 384 if (!once)
335 return -1; 385 return -1;
336 386
337 once->fd = fd; 387 once->fd = fd;
338 once->cb = cb; 388 once->cb = cb;
339 once->arg = arg; 389 once->arg = arg;
340 390
341 ev_once (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);
342 392
343 return 0; 393 return 0;
344} 394}
345 395
346int event_base_priority_init (struct event_base *base, int npri) 396int event_base_priority_init (struct event_base *base, int npri)
347{ 397{
348 return 0; 398 /*dLOOPbase;*/
349}
350 399
400 return 0;
401}
402

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