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Comparing libev/event.c (file contents):
Revision 1.21 by root, Thu Nov 8 21:14:15 2007 UTC vs.
Revision 1.44 by root, Sat Oct 16 06:46:55 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 43
36#ifndef WIN32 44#ifdef EV_EVENT_H
37# include <sys/time.h> 45# include EV_EVENT_H
38#endif 46#else
39
40#include "ev.h"
41#include "event.h" 47# include "event.h"
48#endif
42 49
43#if EV_MULTIPLICITY 50#if EV_MULTIPLICITY
44# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base 51# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
45# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base 52# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
46#else 53#else
… …
52struct event_base 59struct event_base
53{ 60{
54 int dummy; 61 int dummy;
55}; 62};
56 63
57static struct event_base *x_cur; 64static struct event_base *ev_x_cur;
58
59static void
60tv_set (struct timeval *tv, ev_tstamp at)
61{
62 tv->tv_sec = (long)at;
63 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
64}
65 65
66static ev_tstamp 66static ev_tstamp
67tv_get (struct timeval *tv) 67ev_tv_get (struct timeval *tv)
68{ 68{
69 if (tv) 69 if (tv)
70 {
70 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 }
71 else 74 else
72 return -1.; 75 return -1.;
73} 76}
74 77
75#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)
76 80
77const char *event_get_version (void) 81const char *event_get_version (void)
78{ 82{
83 /* returns ABI, not API or library, version */
79 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); 84 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
80} 85}
81 86
82const char *event_get_method (void) 87const char *event_get_method (void)
83{ 88{
… …
85} 90}
86 91
87void *event_init (void) 92void *event_init (void)
88{ 93{
89#if EV_MULTIPLICITY 94#if EV_MULTIPLICITY
90 if (x_cur) 95 if (ev_x_cur)
91 x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO); 96 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
92 else 97 else
93 x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO); 98 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
94#else 99#else
95 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));
96 101
97 x_cur = (struct event_base *)(long)ev_default_loop (EVMETHOD_AUTO); 102 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
98#endif 103#endif
99 104
100 return x_cur; 105 return ev_x_cur;
101} 106}
102 107
103void event_base_free (struct event_base *base) 108void event_base_free (struct event_base *base)
104{ 109{
105 dLOOPbase; 110 dLOOPbase;
106 111
107#if EV_MULTIPLICITY 112#if EV_MULTIPLICITY
108 if (ev_default_loop (EVMETHOD_AUTO) != loop) 113 if (ev_default_loop (EVFLAG_AUTO) != loop)
109 ev_loop_destroy (loop); 114 ev_loop_destroy (loop);
110#endif 115#endif
111} 116}
112 117
113int event_dispatch (void) 118int event_dispatch (void)
114{ 119{
115 return event_base_dispatch (x_cur); 120 return event_base_dispatch (ev_x_cur);
116} 121}
117 122
118#ifdef EV_STANDALONE 123#ifdef EV_STANDALONE
119void event_set_log_callback (event_log_cb cb) 124void event_set_log_callback (event_log_cb cb)
120{ 125{
… …
122} 127}
123#endif 128#endif
124 129
125int event_loop (int flags) 130int event_loop (int flags)
126{ 131{
127 return event_base_loop (x_cur, flags); 132 return event_base_loop (ev_x_cur, flags);
128} 133}
129 134
130int event_loopexit (struct timeval *tv) 135int event_loopexit (struct timeval *tv)
131{ 136{
132 return event_base_loopexit (x_cur, tv); 137 return event_base_loopexit (ev_x_cur, tv);
133} 138}
134 139
135static void 140static void
136x_cb (struct event *ev, int revents) 141ev_x_cb (struct event *ev, int revents)
137{ 142{
138 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; 143 revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;
139 144
140 ev->ev_res = revents; 145 ev->ev_res = revents;
141 ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); 146 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
142} 147}
143 148
144static void 149static void
145x_cb_sig (EV_P_ struct ev_signal *w, int revents) 150ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
146{ 151{
147 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));
148 153
149 if (revents & EV_ERROR) 154 if (revents & EV_ERROR)
150 event_del (ev); 155 event_del (ev);
151 156
152 x_cb (ev, revents); 157 ev_x_cb (ev, revents);
153} 158}
154 159
155static void 160static void
156x_cb_io (EV_P_ struct ev_io *w, int revents) 161ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
157{ 162{
158 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));
159 164
160 if (revents & EV_ERROR) 165 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
161 event_del (ev); 166 event_del (ev);
162 else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
163 ev_io_stop (EV_A_ w);
164 167
165 x_cb (ev, revents); 168 ev_x_cb (ev, revents);
166} 169}
167 170
168static void 171static void
169x_cb_to (EV_P_ struct ev_timer *w, int revents) 172ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
170{ 173{
171 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); 174 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
172 175
173 event_del (ev); 176 event_del (ev);
174 177
175 x_cb (ev, revents); 178 ev_x_cb (ev, revents);
176} 179}
177 180
178void 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)
179{ 182{
180 if (events & EV_SIGNAL) 183 if (events & EV_SIGNAL)
181 ev_watcher_init (&ev->iosig.sig, x_cb_sig); 184 ev_init (&ev->iosig.sig, ev_x_cb_sig);
182 else 185 else
183 ev_watcher_init (&ev->iosig.io, x_cb_io); 186 ev_init (&ev->iosig.io, ev_x_cb_io);
184 187
185 ev_watcher_init (&ev->to, x_cb_to); 188 ev_init (&ev->to, ev_x_cb_to);
186 189
187 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 */
188 ev->ev_fd = fd; 191 ev->ev_fd = fd;
189 ev->ev_events = events; 192 ev->ev_events = events;
190 ev->ev_pri = 0; 193 ev->ev_pri = 0;
191 ev->ev_callback = cb; 194 ev->ev_callback = cb;
192 ev->ev_arg = arg; 195 ev->ev_arg = arg;
193 ev->ev_res = 0; 196 ev->ev_res = 0;
197 ev->ev_flags = EVLIST_INIT;
194} 198}
195 199
196int 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)
197{ 201{
198 return event_base_once (x_cur, fd, events, cb, arg, tv); 202 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
199} 203}
200 204
201int event_add (struct event *ev, struct timeval *tv) 205int event_add (struct event *ev, struct timeval *tv)
202{ 206{
203 dLOOPev; 207 dLOOPev;
204 208
205 /* disable all watchers */
206 event_del (ev);
207
208 if (ev->ev_events & EV_SIGNAL) 209 if (ev->ev_events & EV_SIGNAL)
209 { 210 {
211 if (!ev_is_active (&ev->iosig.sig))
212 {
210 ev_signal_set (&ev->iosig.sig, ev->ev_fd); 213 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
211 ev_signal_start (EV_A_ &ev->iosig.sig); 214 ev_signal_start (EV_A_ &ev->iosig.sig);
215
216 ev->ev_flags |= EVLIST_SIGNAL;
217 }
212 } 218 }
213 else if (ev->ev_events & (EV_READ | EV_WRITE)) 219 else if (ev->ev_events & (EV_READ | EV_WRITE))
214 { 220 {
221 if (!ev_is_active (&ev->iosig.io))
222 {
215 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));
216 ev_io_start (EV_A_ &ev->iosig.io); 224 ev_io_start (EV_A_ &ev->iosig.io);
225
226 ev->ev_flags |= EVLIST_INSERTED;
227 }
217 } 228 }
218 229
219 if (tv) 230 if (tv)
220 { 231 {
221 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 {
222 ev_timer_start (EV_A_ &ev->to); 238 ev_timer_stop (EV_A_ &ev->to);
239 ev->ev_flags &= ~EVLIST_TIMEOUT;
223 } 240 }
241
242 ev->ev_flags |= EVLIST_ACTIVE;
224 243
225 return 0; 244 return 0;
226} 245}
227 246
228int event_del (struct event *ev) 247int event_del (struct event *ev)
229{ 248{
230 dLOOPev; 249 dLOOPev;
231 250
232 if (ev->ev_events & EV_SIGNAL) 251 if (ev->ev_events & EV_SIGNAL)
233 {
234 /* sig */
235 if (ev_is_active (&ev->iosig.sig))
236 ev_signal_stop (EV_A_ &ev->iosig.sig); 252 ev_signal_stop (EV_A_ &ev->iosig.sig);
237 }
238 else if (ev->ev_events & (EV_READ | EV_WRITE)) 253 else if (ev->ev_events & (EV_READ | EV_WRITE))
239 {
240 /* io */
241 if (ev_is_active (&ev->iosig.io))
242 ev_io_stop (EV_A_ &ev->iosig.io); 254 ev_io_stop (EV_A_ &ev->iosig.io);
243 }
244 255
245 if (ev_is_active (&ev->to)) 256 if (ev_is_active (&ev->to))
246 ev_timer_stop (EV_A_ &ev->to); 257 ev_timer_stop (EV_A_ &ev->to);
247 258
259 ev->ev_flags = EVLIST_INIT;
260
248 return 0; 261 return 0;
249} 262}
250 263
251void event_active (struct event *ev, int res, short ncalls) 264void event_active (struct event *ev, int res, short ncalls)
252{ 265{
266 dLOOPev;
267
253 if (res & EV_TIMEOUT) 268 if (res & EV_TIMEOUT)
254 ev_feed_event (&iosig.to, res & EV_TIMEOUT); 269 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
255 270
256 if (res & EV_SIGNAL) 271 if (res & EV_SIGNAL)
257 ev_feed_event (&iosig.sig, res & EV_SIGNAL); 272 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
258 273
259 if (res & (EV_READ | EV_WRITE)) 274 if (res & (EV_READ | EV_WRITE))
260 ev_feed_event (&iosig.io, res & (EV_READ | EV_WRITE)); 275 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
261} 276}
262 277
263int event_pending (struct event *ev, short events, struct timeval *tv) 278int event_pending (struct event *ev, short events, struct timeval *tv)
264{ 279{
265 short revents = 0; 280 short revents = 0;
266 dLOOPev; 281 dLOOPev;
267
268 282
269 if (ev->ev_events & EV_SIGNAL) 283 if (ev->ev_events & EV_SIGNAL)
270 { 284 {
271 /* sig */ 285 /* sig */
272 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))
… …
282 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))
283 { 297 {
284 revents |= EV_TIMEOUT; 298 revents |= EV_TIMEOUT;
285 299
286 if (tv) 300 if (tv)
287 tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ 301 EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
288 } 302 }
289 303
290 return events & revents; 304 return events & revents;
291} 305}
292 306
293int event_priority_init (int npri) 307int event_priority_init (int npri)
294{ 308{
295 return event_base_priority_init (x_cur, npri); 309 return event_base_priority_init (ev_x_cur, npri);
296} 310}
297 311
298int event_priority_set (struct event *ev, int pri) 312int event_priority_set (struct event *ev, int pri)
299{ 313{
300 ev->ev_pri = pri; 314 ev->ev_pri = pri;
… …
322{ 336{
323 return event_base_loop (base, 0); 337 return event_base_loop (base, 0);
324} 338}
325 339
326static void 340static void
327x_loopexit_cb (int revents, void *base) 341ev_x_loopexit_cb (int revents, void *base)
328{ 342{
329 dLOOPbase; 343 dLOOPbase;
330 344
331 ev_unloop (EV_A_ EVUNLOOP_ONCE); 345 ev_unloop (EV_A_ EVUNLOOP_ONE);
332} 346}
333 347
334int event_base_loopexit (struct event_base *base, struct timeval *tv) 348int event_base_loopexit (struct event_base *base, struct timeval *tv)
335{ 349{
336 ev_tstamp after = tv_get (tv); 350 ev_tstamp after = ev_tv_get (tv);
337 dLOOPbase; 351 dLOOPbase;
338 352
339 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); 353 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
340 354
341 return -1; 355 return 0;
342} 356}
343 357
344struct x_once 358struct ev_x_once
345{ 359{
346 int fd; 360 int fd;
347 void (*cb)(int, short, void *); 361 void (*cb)(int, short, void *);
348 void *arg; 362 void *arg;
349}; 363};
350 364
351static void 365static void
352x_once_cb (int revents, void *arg) 366ev_x_once_cb (int revents, void *arg)
353{ 367{
354 struct x_once *once = (struct x_once *)arg; 368 struct ev_x_once *once = (struct ev_x_once *)arg;
355 369
356 once->cb (once->fd, revents, once->arg); 370 once->cb (once->fd, (short)revents, once->arg);
357 free (once); 371 free (once);
358} 372}
359 373
360int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) 374int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
361{ 375{
362 struct x_once *once = (struct x_once *)malloc (sizeof (struct x_once)); 376 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
363 dLOOPbase; 377 dLOOPbase;
364 378
365 if (!once) 379 if (!once)
366 return -1; 380 return -1;
367 381
368 once->fd = fd; 382 once->fd = fd;
369 once->cb = cb; 383 once->cb = cb;
370 once->arg = arg; 384 once->arg = arg;
371 385
372 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); 386 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
373 387
374 return 0; 388 return 0;
375} 389}
376 390
377int event_base_priority_init (struct event_base *base, int npri) 391int event_base_priority_init (struct event_base *base, int npri)

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