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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 1.52 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 (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{
129 dLOOPbase;
130
131#if EV_MULTIPLICITY
132 if (!ev_is_default_loop (loop))
133 ev_loop_destroy (loop);
134#endif
135}
136
137int event_dispatch (void)
138{
139 return event_base_dispatch (ev_x_cur);
140}
141
142#ifdef EV_STANDALONE
143void event_set_log_callback (event_log_cb cb)
144{
85 /* nop */ 145 /* nop */
86} 146}
87 147#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}
97 148
98int event_loop (int flags) 149int event_loop (int flags)
99{ 150{
100 return event_base_loop (x_cur, flags); 151 return event_base_loop (ev_x_cur, flags);
101} 152}
102 153
103int event_loopexit (struct timeval *tv) 154int event_loopexit (struct timeval *tv)
104{ 155{
105 event_base_loopexit (x_cur, tv); 156 return event_base_loopexit (ev_x_cur, tv);
106} 157}
107 158
159event_callback_fn event_get_callback
160(const struct event *ev)
161{
162 return ev->ev_callback;
163}
164
108static void 165static void
109x_cb (struct event *ev, int revents) 166ev_x_cb (struct event *ev, int revents)
110{ 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{
111 if (ev->ev_events & EV_SIGNAL) 208 if (events & EV_SIGNAL)
112 { 209 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 210 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); 211 ev_init (&ev->iosig.io, ev_x_cb_io);
163 212
164 ev_watcher_init (&ev->to, x_cb_to); 213 ev_init (&ev->to, ev_x_cb_to);
165 214
166 ev->ev_base = x_cur; 215 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
167 ev->ev_fd = fd; 216 ev->ev_fd = fd;
168 ev->ev_events = events; 217 ev->ev_events = events;
169 ev->ev_pri = 0; 218 ev->ev_pri = 0;
170 ev->ev_callback = cb; 219 ev->ev_callback = cb;
171 ev->ev_arg = arg; 220 ev->ev_arg = arg;
172 ev->ev_res = 0; 221 ev->ev_res = 0;
222 ev->ev_flags = EVLIST_INIT;
173} 223}
174 224
175int 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)
176{ 226{
177 event_base_once (x_cur, fd, events, cb, arg, tv); 227 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
178} 228}
179 229
180int event_add (struct event *ev, struct timeval *tv) 230int event_add (struct event *ev, struct timeval *tv)
181{ 231{
182 /* disable all watchers */ 232 dLOOPev;
183 event_del (ev);
184 233
185 if (ev->ev_events & EV_SIGNAL) 234 if (ev->ev_events & EV_SIGNAL)
186 { 235 {
236 if (!ev_is_active (&ev->iosig.sig))
237 {
187 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 238 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
188 ev_signal_start (&ev->iosig.sig); 239 ev_signal_start (EV_A_ &ev->iosig.sig);
189 ++x_actives; 240
241 ev->ev_flags |= EVLIST_SIGNAL;
242 }
190 } 243 }
191 else if (ev->ev_events & (EV_READ | EV_WRITE)) 244 else if (ev->ev_events & (EV_READ | EV_WRITE))
192 { 245 {
246 if (!ev_is_active (&ev->iosig.io))
247 {
193 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));
194 ev_io_start (&ev->iosig.io); 249 ev_io_start (EV_A_ &ev->iosig.io);
195 ++x_actives; 250
251 ev->ev_flags |= EVLIST_INSERTED;
252 }
196 } 253 }
197 254
198 if (tv) 255 if (tv)
199 { 256 {
200 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 {
201 ev_timer_start (&ev->to); 263 ev_timer_stop (EV_A_ &ev->to);
202 ++x_actives; 264 ev->ev_flags &= ~EVLIST_TIMEOUT;
203 } 265 }
266
267 ev->ev_flags |= EVLIST_ACTIVE;
204 268
205 return 0; 269 return 0;
206} 270}
207 271
208int event_del (struct event *ev) 272int event_del (struct event *ev)
209{ 273{
274 dLOOPev;
275
210 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)
211 { 309 {
212 /* sig */ 310 /* sig */
213 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)
214 { 326 {
215 ev_signal_stop (&ev->iosig.sig); 327 ev_tstamp at = ev_now (EV_A);
216 --x_actives; 328
329 tv->tv_sec = (long)at;
330 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
217 } 331 }
218 } 332 }
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 }
262 333
263 return events & revents; 334 return events & revents;
264} 335}
265 336
266int event_priority_init (int npri) 337int event_priority_init (int npri)
267{ 338{
268 return event_base_priority_init (x_cur, npri); 339 return event_base_priority_init (ev_x_cur, npri);
269} 340}
270 341
271int event_priority_set (struct event *ev, int pri) 342int event_priority_set (struct event *ev, int pri)
272{ 343{
273 ev->ev_pri = pri; 344 ev->ev_pri = pri;
… …
282 return 0; 353 return 0;
283} 354}
284 355
285int event_base_loop (struct event_base *base, int flags) 356int event_base_loop (struct event_base *base, int flags)
286{ 357{
287 do 358 dLOOPbase;
288 {
289 ev_loop (flags | EVLOOP_ONESHOT);
290 }
291 while (!(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) && x_actives && !ev_loop_done);
292 359
293 return 0; 360 return !ev_run (EV_A_ flags);
294} 361}
295 362
296int event_base_dispatch (struct event_base *base) 363int event_base_dispatch (struct event_base *base)
297{ 364{
298 return event_base_loop (base, 0); 365 return event_base_loop (base, 0);
299} 366}
300 367
301static void 368static void
302x_loopexit_cb (int revents, void *arg) 369ev_x_loopexit_cb (int revents, void *base)
303{ 370{
304 ev_loop_done = 2; 371 dLOOPbase;
372
373 ev_break (EV_A_ EVBREAK_ONE);
305} 374}
306 375
307int event_base_loopexit (struct event_base *base, struct timeval *tv) 376int event_base_loopexit (struct event_base *base, struct timeval *tv)
308{ 377{
309 ev_tstamp after = tv_get (tv); 378 ev_tstamp after = ev_tv_get (tv);
379 dLOOPbase;
310 380
311 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);
312}
313 382
383 return 0;
384}
385
314struct x_once 386struct ev_x_once
315{ 387{
316 int fd; 388 int fd;
317 void (*cb)(int, short, void *); 389 void (*cb)(int, short, void *);
318 void *arg; 390 void *arg;
319}; 391};
320 392
321static void 393static void
322x_once_cb (int revents, void *arg) 394ev_x_once_cb (int revents, void *arg)
323{ 395{
324 struct x_once *once = arg; 396 struct ev_x_once *once = (struct ev_x_once *)arg;
325 397
326 once->cb (once->fd, revents, once->arg); 398 once->cb (once->fd, (short)revents, once->arg);
327 free (once); 399 free (once);
328} 400}
329 401
330int 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)
331{ 403{
332 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;
333 406
334 if (!once) 407 if (!once)
335 return -1; 408 return -1;
336 409
337 once->fd = fd; 410 once->fd = fd;
338 once->cb = cb; 411 once->cb = cb;
339 once->arg = arg; 412 once->arg = arg;
340 413
341 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);
342 415
343 return 0; 416 return 0;
344} 417}
345 418
346int event_base_priority_init (struct event_base *base, int npri) 419int event_base_priority_init (struct event_base *base, int npri)
347{ 420{
348 return 0; 421 /*dLOOPbase;*/
349}
350 422
423 return 0;
424}
425

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