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Comparing libev/event.c (file contents):
Revision 1.11 by root, Sun Nov 4 16:52:52 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 <sys/time.h>
35#include <assert.h> 42#include <assert.h>
36 43
37#ifndef EV_EMBED 44#ifdef EV_EVENT_H
45# include EV_EVENT_H
46#else
38# include "event.h" 47# include "event.h"
39#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)
40 52
41#if EV_MULTIPLICITY 53#if EV_MULTIPLICITY
42# 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
43# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base 55# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
44#else 56#else
… …
50struct event_base 62struct event_base
51{ 63{
52 int dummy; 64 int dummy;
53}; 65};
54 66
55static struct event_base *x_cur; 67static struct event_base *ev_x_cur;
56
57static void
58tv_set (struct timeval *tv, ev_tstamp at)
59{
60 tv->tv_sec = (long)at;
61 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
62}
63 68
64static ev_tstamp 69static ev_tstamp
65tv_get (struct timeval *tv) 70ev_tv_get (struct timeval *tv)
66{ 71{
67 if (tv) 72 if (tv)
73 {
68 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 }
69 else 77 else
70 return -1.; 78 return -1.;
71} 79}
72 80
73#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)
74 83
75const char *event_get_version (void) 84const char *event_get_version (void)
76{ 85{
86 /* returns ABI, not API or library, version */
77 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 87 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
78} 88}
79 89
80const char *event_get_method (void) 90const char *event_get_method (void)
81{ 91{
… …
83} 93}
84 94
85void *event_init (void) 95void *event_init (void)
86{ 96{
87#if EV_MULTIPLICITY 97#if EV_MULTIPLICITY
88 if (x_cur) 98 if (ev_x_cur)
89 x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO); 99 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
90 else 100 else
91 x_cur = ev_default_loop (EVMETHOD_AUTO); 101 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
92#else 102#else
93 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));
94 104
95 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 105 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
96#endif 106#endif
97 107
98 return x_cur; 108 return ev_x_cur;
99} 109}
100 110
101void event_base_free (struct event_base *base) 111void event_base_free (struct event_base *base)
102{ 112{
103 dLOOPbase; 113 dLOOPbase;
104 114
105#if EV_MULTIPLICITY 115#if EV_MULTIPLICITY
116 if (ev_default_loop (EVFLAG_AUTO) != loop)
106 ev_loop_delete (loop); 117 ev_loop_destroy (loop);
107#endif 118#endif
108} 119}
109 120
110int event_dispatch (void) 121int event_dispatch (void)
111{ 122{
112 return event_base_dispatch (x_cur); 123 return event_base_dispatch (ev_x_cur);
113} 124}
114 125
115#ifdef EV_EMBED 126#ifdef EV_STANDALONE
116void event_set_log_callback (event_log_cb cb) 127void event_set_log_callback (event_log_cb cb)
117{ 128{
118 /* nop */ 129 /* nop */
119} 130}
120#endif 131#endif
121 132
122int event_loop (int flags) 133int event_loop (int flags)
123{ 134{
124 return event_base_loop (x_cur, flags); 135 return event_base_loop (ev_x_cur, flags);
125} 136}
126 137
127int event_loopexit (struct timeval *tv) 138int event_loopexit (struct timeval *tv)
128{ 139{
129 return event_base_loopexit (x_cur, tv); 140 return event_base_loopexit (ev_x_cur, tv);
130} 141}
131 142
132static void 143static void
133x_cb (struct event *ev, int revents) 144ev_x_cb (struct event *ev, int revents)
134{ 145{
135 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 146 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
136 147
137 ev->ev_res = revents; 148 ev->ev_res = revents;
138 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 149 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
139} 150}
140 151
141static void 152static void
142x_cb_sig (EV_P_ struct ev_signal *w, int revents) 153ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
143{ 154{
144 x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); 155 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
145}
146 156
157 if (revents & EV_ERROR)
158 event_del (ev);
159
160 ev_x_cb (ev, revents);
161}
162
147static void 163static void
148x_cb_io (EV_P_ struct ev_io *w, int revents) 164ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
149{ 165{
150 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));
151 167
152 if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) 168 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
153 ev_io_stop (EV_A_ w); 169 event_del (ev);
154 170
155 x_cb (ev, revents); 171 ev_x_cb (ev, revents);
156} 172}
157 173
158static void 174static void
159x_cb_to (EV_P_ struct ev_timer *w, int revents) 175ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
160{ 176{
161 x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents); 177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
178
179 event_del (ev);
180
181 ev_x_cb (ev, revents);
162} 182}
163 183
164void 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)
165{ 185{
166 if (!ev->initialised)
167 {
168 ev->initialised = 1;
169
170 if (events & EV_SIGNAL) 186 if (events & EV_SIGNAL)
171 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 187 ev_init (&ev->iosig.sig, ev_x_cb_sig);
172 else 188 else
173 ev_watcher_init (&ev->iosig.io, x_cb_io); 189 ev_init (&ev->iosig.io, ev_x_cb_io);
174 190
175 ev_watcher_init (&ev->to, x_cb_to); 191 ev_init (&ev->to, ev_x_cb_to);
176 }
177 192
178 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 */
179 ev->ev_fd = fd; 194 ev->ev_fd = fd;
180 ev->ev_events = events; 195 ev->ev_events = events;
181 ev->ev_pri = 0; 196 ev->ev_pri = 0;
182 ev->ev_callback = cb; 197 ev->ev_callback = cb;
183 ev->ev_arg = arg; 198 ev->ev_arg = arg;
184 ev->ev_res = 0; 199 ev->ev_res = 0;
200 ev->ev_flags = EVLIST_INIT;
185} 201}
186 202
187int 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)
188{ 204{
189 return event_base_once (x_cur, fd, events, cb, arg, tv); 205 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
190} 206}
191 207
192int event_add (struct event *ev, struct timeval *tv) 208int event_add (struct event *ev, struct timeval *tv)
193{ 209{
194 dLOOPev; 210 dLOOPev;
195 211
196 /* disable all watchers */
197 event_del (ev);
198
199 if (ev->ev_events & EV_SIGNAL) 212 if (ev->ev_events & EV_SIGNAL)
200 { 213 {
214 if (!ev_is_active (&ev->iosig.sig))
215 {
201 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 216 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
202 ev_signal_start (EV_A_ &ev->iosig.sig); 217 ev_signal_start (EV_A_ &ev->iosig.sig);
218
219 ev->ev_flags |= EVLIST_SIGNAL;
220 }
203 } 221 }
204 else if (ev->ev_events & (EV_READ | EV_WRITE)) 222 else if (ev->ev_events & (EV_READ | EV_WRITE))
205 { 223 {
224 if (!ev_is_active (&ev->iosig.io))
225 {
206 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));
207 ev_io_start (EV_A_ &ev->iosig.io); 227 ev_io_start (EV_A_ &ev->iosig.io);
228
229 ev->ev_flags |= EVLIST_INSERTED;
230 }
208 } 231 }
209 232
210 if (tv) 233 if (tv)
211 { 234 {
212 ev_timer_set (&ev->to, tv_get (tv), 0.); 235 ev->to.repeat = ev_tv_get (tv);
236 ev_timer_again (EV_A_ &ev->to);
237 ev->ev_flags |= EVLIST_TIMEOUT;
238 }
239 else
240 {
213 ev_timer_start (EV_A_ &ev->to); 241 ev_timer_stop (EV_A_ &ev->to);
242 ev->ev_flags &= ~EVLIST_TIMEOUT;
214 } 243 }
244
245 ev->ev_flags |= EVLIST_ACTIVE;
215 246
216 return 0; 247 return 0;
217} 248}
218 249
219int event_del (struct event *ev) 250int event_del (struct event *ev)
220{ 251{
221 dLOOPev; 252 dLOOPev;
222 253
223 if (ev->ev_events & EV_SIGNAL) 254 if (ev->ev_events & EV_SIGNAL)
224 {
225 /* sig */
226 if (ev_is_active (&ev->iosig.sig))
227 ev_signal_stop (EV_A_ &ev->iosig.sig); 255 ev_signal_stop (EV_A_ &ev->iosig.sig);
228 } 256 else if (ev->ev_events & (EV_READ | EV_WRITE))
229 else
230 {
231 /* io */
232 if (ev_is_active (&ev->iosig.io))
233 ev_io_stop (EV_A_ &ev->iosig.io); 257 ev_io_stop (EV_A_ &ev->iosig.io);
234 }
235 258
236 if (ev_is_active (&ev->to)) 259 if (ev_is_active (&ev->to))
237 ev_timer_stop (EV_A_ &ev->to); 260 ev_timer_stop (EV_A_ &ev->to);
238 261
262 ev->ev_flags = EVLIST_INIT;
263
239 return 0; 264 return 0;
265}
266
267void event_active (struct event *ev, int res, short ncalls)
268{
269 dLOOPev;
270
271 if (res & EV_TIMEOUT)
272 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
273
274 if (res & EV_SIGNAL)
275 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
276
277 if (res & (EV_READ | EV_WRITE))
278 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
240} 279}
241 280
242int event_pending (struct event *ev, short events, struct timeval *tv) 281int event_pending (struct event *ev, short events, struct timeval *tv)
243{ 282{
283 short revents = 0;
244 dLOOPev; 284 dLOOPev;
245 285
246 short revents = 0;
247
248 if (ev->ev_events & EV_SIGNAL) 286 if (ev->ev_events & EV_SIGNAL)
249 { 287 {
250 /* sig */ 288 /* sig */
251 if (ev->iosig.sig.pending) 289 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
252 revents |= EV_SIGNAL; 290 revents |= EV_SIGNAL;
253 } 291 }
254 else 292 else if (ev->ev_events & (EV_READ | EV_WRITE))
255 { 293 {
256 /* io */ 294 /* io */
257 if (ev->iosig.io.pending) 295 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
258 revents |= ev->ev_events & (EV_READ | EV_WRITE); 296 revents |= ev->ev_events & (EV_READ | EV_WRITE);
259 } 297 }
260 298
261 if (ev->to.pending) 299 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
262 { 300 {
263 revents |= EV_TIMEOUT; 301 revents |= EV_TIMEOUT;
264 302
265 if (tv) 303 if (tv)
266 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 :) */
267 } 305 }
268 306
269 return events & revents; 307 return events & revents;
270} 308}
271 309
272int event_priority_init (int npri) 310int event_priority_init (int npri)
273{ 311{
274 return event_base_priority_init (x_cur, npri); 312 return event_base_priority_init (ev_x_cur, npri);
275} 313}
276 314
277int event_priority_set (struct event *ev, int pri) 315int event_priority_set (struct event *ev, int pri)
278{ 316{
279 ev->ev_pri = pri; 317 ev->ev_pri = pri;
… …
290 328
291int event_base_loop (struct event_base *base, int flags) 329int event_base_loop (struct event_base *base, int flags)
292{ 330{
293 dLOOPbase; 331 dLOOPbase;
294 332
295 ev_loop (EV_A_ flags); 333 ev_run (EV_A_ flags);
296 334
297 return 0; 335 return 0;
298} 336}
299 337
300int event_base_dispatch (struct event_base *base) 338int event_base_dispatch (struct event_base *base)
301{ 339{
302 return event_base_loop (base, 0); 340 return event_base_loop (base, 0);
303} 341}
304 342
305static void 343static void
306x_loopexit_cb (int revents, void *base) 344ev_x_loopexit_cb (int revents, void *base)
307{ 345{
308 dLOOPbase; 346 dLOOPbase;
309 347
310 ev_unloop (EV_A_ EVUNLOOP_ONCE); 348 ev_break (EV_A_ EVBREAK_ONE);
311} 349}
312 350
313int event_base_loopexit (struct event_base *base, struct timeval *tv) 351int event_base_loopexit (struct event_base *base, struct timeval *tv)
314{ 352{
353 ev_tstamp after = ev_tv_get (tv);
315 dLOOPbase; 354 dLOOPbase;
316 ev_tstamp after = tv_get (tv);
317 355
318 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);
319 357
320 return -1; 358 return 0;
321} 359}
322 360
323struct x_once 361struct ev_x_once
324{ 362{
325 int fd; 363 int fd;
326 void (*cb)(int, short, void *); 364 void (*cb)(int, short, void *);
327 void *arg; 365 void *arg;
328}; 366};
329 367
330static void 368static void
331x_once_cb (int revents, void *arg) 369ev_x_once_cb (int revents, void *arg)
332{ 370{
333 struct x_once *once = arg; 371 struct ev_x_once *once = (struct ev_x_once *)arg;
334 372
335 once->cb (once->fd, revents, once->arg); 373 once->cb (once->fd, (short)revents, once->arg);
336 free (once); 374 free (once);
337} 375}
338 376
339int 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)
340{ 378{
379 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
341 dLOOPbase; 380 dLOOPbase;
342 struct x_once *once = malloc (sizeof (struct x_once));
343 381
344 if (!once) 382 if (!once)
345 return -1; 383 return -1;
346 384
347 once->fd = fd; 385 once->fd = fd;
348 once->cb = cb; 386 once->cb = cb;
349 once->arg = arg; 387 once->arg = arg;
350 388
351 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);
352 390
353 return 0; 391 return 0;
354} 392}
355 393
356int event_base_priority_init (struct event_base *base, int npri) 394int event_base_priority_init (struct event_base *base, int npri)
357{ 395{
358 dLOOPbase; 396 /*dLOOPbase;*/
359 397
360 return 0; 398 return 0;
361} 399}
362 400

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