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Comparing libev/event.c (file contents):
Revision 1.6 by root, Sat Nov 3 20:24:42 2007 UTC vs.
Revision 1.52 by root, Mon Apr 2 23:14:41 2012 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) 2007,2008,2009,2010,2012 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:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 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
12 * notice, this list of conditions and the following disclaimer. 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
13 * 16 *
14 * * Redistributions in binary form must reproduce the above 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 * copyright notice, this list of conditions and the following 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
16 * disclaimer in the documentation and/or other materials provided 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
17 * with the distribution. 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
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
81const char *
65const char *event_get_version (void) 82event_get_version (void)
66{ 83{
84 /* returns ABI, not API or library, version */
67 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 85 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
68} 86}
69 87
88const char *
70const char *event_get_method (void) 89event_get_method (void)
71{ 90{
72 return "libev"; 91 return "libev";
73} 92}
74 93
75void *event_init (void) 94void *event_init (void)
76{ 95{
77 if (!x_cur && ev_init (0)) 96#if EV_MULTIPLICITY
78 return x_cur = &x_base; 97 if (ev_x_cur)
98 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
99 else
100 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
101#else
102 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
79 103
104 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
105#endif
106
107 return ev_x_cur;
108}
109
110const char *
111event_base_get_method (const struct event_base *base)
112{
113 return "libev";
114}
115
116struct event_base *
117event_base_new (void)
118{
119#if EV_MULTIPLICITY
120 return (struct event_base *)ev_loop_new (EVFLAG_AUTO);
121#else
122 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY"));
80 return 0; 123 return NULL;
124#endif
81} 125}
82 126
83void event_base_free (struct event_base *base) 127void event_base_free (struct event_base *base)
84{ 128{
85 /* nop */ 129 dLOOPbase;
130
131#if EV_MULTIPLICITY
132 if (!ev_is_default_loop (loop))
133 ev_loop_destroy (loop);
134#endif
86} 135}
87 136
88int event_dispatch (void) 137int event_dispatch (void)
89{ 138{
90 return event_base_dispatch (x_cur); 139 return event_base_dispatch (ev_x_cur);
91} 140}
92 141
93#ifdef EV_STANDALONE 142#ifdef EV_STANDALONE
94void event_set_log_callback (event_log_cb cb) 143void event_set_log_callback (event_log_cb cb)
95{ 144{
… …
97} 146}
98#endif 147#endif
99 148
100int event_loop (int flags) 149int event_loop (int flags)
101{ 150{
102 return event_base_loop (x_cur, flags); 151 return event_base_loop (ev_x_cur, flags);
103} 152}
104 153
105int event_loopexit (struct timeval *tv) 154int event_loopexit (struct timeval *tv)
106{ 155{
107 return event_base_loopexit (x_cur, tv); 156 return event_base_loopexit (ev_x_cur, tv);
108} 157}
109 158
159event_callback_fn event_get_callback
160(const struct event *ev)
161{
162 return ev->ev_callback;
163}
164
110static void 165static void
111x_cb (struct event *ev, int revents) 166ev_x_cb (struct event *ev, int revents)
112{ 167{
168 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
169
170 ev->ev_res = revents;
171 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
172}
173
174static void
175ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
176{
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
178
179 if (revents & EV_ERROR)
180 event_del (ev);
181
182 ev_x_cb (ev, revents);
183}
184
185static void
186ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
187{
188 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
189
190 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
191 event_del (ev);
192
193 ev_x_cb (ev, revents);
194}
195
196static void
197ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
198{
199 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
200
201 event_del (ev);
202
203 ev_x_cb (ev, revents);
204}
205
206void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
207{
113 if (ev->ev_events & EV_SIGNAL) 208 if (events & EV_SIGNAL)
114 { 209 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 210 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); 211 ev_init (&ev->iosig.io, ev_x_cb_io);
165 212
166 ev_watcher_init (&ev->to, x_cb_to); 213 ev_init (&ev->to, ev_x_cb_to);
167 214
168 ev->ev_base = x_cur; 215 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
169 ev->ev_fd = fd; 216 ev->ev_fd = fd;
170 ev->ev_events = events; 217 ev->ev_events = events;
171 ev->ev_pri = 0; 218 ev->ev_pri = 0;
172 ev->ev_callback = cb; 219 ev->ev_callback = cb;
173 ev->ev_arg = arg; 220 ev->ev_arg = arg;
174 ev->ev_res = 0; 221 ev->ev_res = 0;
222 ev->ev_flags = EVLIST_INIT;
175} 223}
176 224
177int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 225int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
178{ 226{
179 return event_base_once (x_cur, fd, events, cb, arg, tv); 227 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
180} 228}
181 229
182int event_add (struct event *ev, struct timeval *tv) 230int event_add (struct event *ev, struct timeval *tv)
183{ 231{
184 /* disable all watchers */ 232 dLOOPev;
185 event_del (ev);
186 233
187 if (ev->ev_events & EV_SIGNAL) 234 if (ev->ev_events & EV_SIGNAL)
188 { 235 {
236 if (!ev_is_active (&ev->iosig.sig))
237 {
189 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 238 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
190 ev_signal_start (&ev->iosig.sig); 239 ev_signal_start (EV_A_ &ev->iosig.sig);
191 ++x_actives; 240
241 ev->ev_flags |= EVLIST_SIGNAL;
242 }
192 } 243 }
193 else if (ev->ev_events & (EV_READ | EV_WRITE)) 244 else if (ev->ev_events & (EV_READ | EV_WRITE))
194 { 245 {
246 if (!ev_is_active (&ev->iosig.io))
247 {
195 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); 248 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
196 ev_io_start (&ev->iosig.io); 249 ev_io_start (EV_A_ &ev->iosig.io);
197 ++x_actives; 250
251 ev->ev_flags |= EVLIST_INSERTED;
252 }
198 } 253 }
199 254
200 if (tv) 255 if (tv)
201 { 256 {
202 ev_timer_set (&ev->to, tv_get (tv), 0.); 257 ev->to.repeat = ev_tv_get (tv);
258 ev_timer_again (EV_A_ &ev->to);
259 ev->ev_flags |= EVLIST_TIMEOUT;
260 }
261 else
262 {
203 ev_timer_start (&ev->to); 263 ev_timer_stop (EV_A_ &ev->to);
204 ++x_actives; 264 ev->ev_flags &= ~EVLIST_TIMEOUT;
205 } 265 }
266
267 ev->ev_flags |= EVLIST_ACTIVE;
206 268
207 return 0; 269 return 0;
208} 270}
209 271
210int event_del (struct event *ev) 272int event_del (struct event *ev)
211{ 273{
274 dLOOPev;
275
212 if (ev->ev_events & EV_SIGNAL) 276 if (ev->ev_events & EV_SIGNAL)
277 ev_signal_stop (EV_A_ &ev->iosig.sig);
278 else if (ev->ev_events & (EV_READ | EV_WRITE))
279 ev_io_stop (EV_A_ &ev->iosig.io);
280
281 if (ev_is_active (&ev->to))
282 ev_timer_stop (EV_A_ &ev->to);
283
284 ev->ev_flags = EVLIST_INIT;
285
286 return 0;
287}
288
289void event_active (struct event *ev, int res, short ncalls)
290{
291 dLOOPev;
292
293 if (res & EV_TIMEOUT)
294 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
295
296 if (res & EV_SIGNAL)
297 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
298
299 if (res & (EV_READ | EV_WRITE))
300 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
301}
302
303int event_pending (struct event *ev, short events, struct timeval *tv)
304{
305 short revents = 0;
306 dLOOPev;
307
308 if (ev->ev_events & EV_SIGNAL)
213 { 309 {
214 /* sig */ 310 /* sig */
215 if (ev_is_active (&ev->iosig.sig)) 311 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
312 revents |= EV_SIGNAL;
313 }
314 else if (ev->ev_events & (EV_READ | EV_WRITE))
315 {
316 /* io */
317 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
318 revents |= ev->ev_events & (EV_READ | EV_WRITE);
319 }
320
321 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
322 {
323 revents |= EV_TIMEOUT;
324
325 if (tv)
216 { 326 {
217 ev_signal_stop (&ev->iosig.sig); 327 ev_tstamp at = ev_now (EV_A);
218 --x_actives; 328
329 tv->tv_sec = (long)at;
330 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
219 } 331 }
220 } 332 }
221 else
222 {
223 /* io */
224 if (ev_is_active (&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);
255 }
256
257 if (ev->to.pending)
258 {
259 revents |= EV_TIMEOUT;
260
261 if (tv)
262 tv_set (tv, ev_now); /* not sure if this is right :) */
263 }
264 333
265 return events & revents; 334 return events & revents;
266} 335}
267 336
268int event_priority_init (int npri) 337int event_priority_init (int npri)
269{ 338{
270 return event_base_priority_init (x_cur, npri); 339 return event_base_priority_init (ev_x_cur, npri);
271} 340}
272 341
273int event_priority_set (struct event *ev, int pri) 342int event_priority_set (struct event *ev, int pri)
274{ 343{
275 ev->ev_pri = pri; 344 ev->ev_pri = pri;
… …
284 return 0; 353 return 0;
285} 354}
286 355
287int event_base_loop (struct event_base *base, int flags) 356int event_base_loop (struct event_base *base, int flags)
288{ 357{
289 do 358 dLOOPbase;
290 {
291 ev_loop (flags | EVLOOP_ONESHOT);
292 }
293 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
294 359
295 return 0; 360 return !ev_run (EV_A_ flags);
296} 361}
297 362
298int event_base_dispatch (struct event_base *base) 363int event_base_dispatch (struct event_base *base)
299{ 364{
300 return event_base_loop (base, 0); 365 return event_base_loop (base, 0);
301} 366}
302 367
303static void 368static void
304x_loopexit_cb (int revents, void *arg) 369ev_x_loopexit_cb (int revents, void *base)
305{ 370{
306 ev_loop_done = 2; 371 dLOOPbase;
372
373 ev_break (EV_A_ EVBREAK_ONE);
307} 374}
308 375
309int event_base_loopexit (struct event_base *base, struct timeval *tv) 376int event_base_loopexit (struct event_base *base, struct timeval *tv)
310{ 377{
311 ev_tstamp after = tv_get (tv); 378 ev_tstamp after = ev_tv_get (tv);
379 dLOOPbase;
312 380
313 ev_once (-1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 381 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
314 382
315 return -1; 383 return 0;
316} 384}
317 385
318struct x_once 386struct ev_x_once
319{ 387{
320 int fd; 388 int fd;
321 void (*cb)(int, short, void *); 389 void (*cb)(int, short, void *);
322 void *arg; 390 void *arg;
323}; 391};
324 392
325static void 393static void
326x_once_cb (int revents, void *arg) 394ev_x_once_cb (int revents, void *arg)
327{ 395{
328 struct x_once *once = arg; 396 struct ev_x_once *once = (struct ev_x_once *)arg;
329 397
330 once->cb (once->fd, revents, once->arg); 398 once->cb (once->fd, (short)revents, once->arg);
331 free (once); 399 free (once);
332} 400}
333 401
334int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 402int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
335{ 403{
336 struct x_once *once = malloc (sizeof (struct x_once)); 404 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
405 dLOOPbase;
337 406
338 if (!once) 407 if (!once)
339 return -1; 408 return -1;
340 409
341 once->fd = fd; 410 once->fd = fd;
342 once->cb = cb; 411 once->cb = cb;
343 once->arg = arg; 412 once->arg = arg;
344 413
345 ev_once (fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 414 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
346 415
347 return 0; 416 return 0;
348} 417}
349 418
350int event_base_priority_init (struct event_base *base, int npri) 419int event_base_priority_init (struct event_base *base, int npri)
351{ 420{
352 return 0; 421 /*dLOOPbase;*/
353}
354 422
423 return 0;
424}
425

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