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Comparing libev/ev.c (file contents):
Revision 1.15 by root, Wed Oct 31 11:56:34 2007 UTC vs.
Revision 1.51 by root, Sat Nov 3 21:58:51 2007 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * * Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
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
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 */
31#ifndef EV_STANDALONE
32# include "config.h"
33#endif
34
1#include <math.h> 35#include <math.h>
2#include <stdlib.h> 36#include <stdlib.h>
3#include <unistd.h> 37#include <unistd.h>
4#include <fcntl.h> 38#include <fcntl.h>
5#include <signal.h> 39#include <signal.h>
40#include <stddef.h>
6 41
7#include <stdio.h> 42#include <stdio.h>
8 43
9#include <assert.h> 44#include <assert.h>
10#include <errno.h> 45#include <errno.h>
46#include <sys/types.h>
47#ifndef WIN32
48# include <sys/wait.h>
49#endif
11#include <sys/time.h> 50#include <sys/time.h>
12#include <time.h> 51#include <time.h>
13 52
14#define HAVE_EPOLL 1 53/**/
15 54
16#ifndef HAVE_MONOTONIC 55#ifndef EV_USE_MONOTONIC
56# define EV_USE_MONOTONIC 1
57#endif
58
59#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1
61#endif
62
63#ifndef EV_USEV_POLL
64# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
65#endif
66
67#ifndef EV_USE_EPOLL
68# define EV_USE_EPOLL 0
69#endif
70
71#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0
73#endif
74
75#ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 1
77#endif
78
79/**/
80
17# ifdef CLOCK_MONOTONIC 81#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC
18# define HAVE_MONOTONIC 1 83# define EV_USE_MONOTONIC 0
19# endif 84#endif
20#endif
21 85
22#ifndef HAVE_SELECT
23# define HAVE_SELECT 1
24#endif
25
26#ifndef HAVE_EPOLL
27# define HAVE_EPOLL 0
28#endif
29
30#ifndef HAVE_REALTIME 86#ifndef CLOCK_REALTIME
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 87# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0
32#endif 89#endif
90
91/**/
33 92
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
36 97
37#include "ev.h" 98#include "ev.h"
99
100#if __GNUC__ >= 3
101# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline
103#else
104# define expect(expr,value) (expr)
105# define inline static
106#endif
107
108#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1)
110
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI)
38 113
39typedef struct ev_watcher *W; 114typedef struct ev_watcher *W;
40typedef struct ev_watcher_list *WL; 115typedef struct ev_watcher_list *WL;
41typedef struct ev_watcher_time *WT; 116typedef struct ev_watcher_time *WT;
42 117
43static ev_tstamp now, diff; /* monotonic clock */ 118static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
44ev_tstamp ev_now; 119static ev_tstamp rt_now;
45int ev_method; 120static int method;
46 121
47static int have_monotonic; /* runtime */ 122static int have_monotonic; /* runtime */
48 123
49static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
50static void (*method_modify)(int fd, int oev, int nev); 125static void (*method_modify)(EV_P_ int fd, int oev, int nev);
51static void (*method_poll)(ev_tstamp timeout); 126static void (*method_poll)(EV_P_ ev_tstamp timeout);
127
128static int activecnt; /* number of active events */
129
130#if EV_USE_SELECT
131static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo;
132static int vec_max;
133#endif
134
135#if EV_USEV_POLL
136static struct pollfd *polls;
137static int pollmax, pollcnt;
138static int *pollidxs; /* maps fds into structure indices */
139static int pollidxmax;
140#endif
141
142#if EV_USE_EPOLL
143static int epoll_fd = -1;
144
145static struct epoll_event *events;
146static int eventmax;
147#endif
148
149#if EV_USE_KQUEUE
150static int kqueue_fd;
151static struct kevent *kqueue_changes;
152static int kqueue_changemax, kqueue_changecnt;
153static struct kevent *kqueue_events;
154static int kqueue_eventmax;
155#endif
52 156
53/*****************************************************************************/ 157/*****************************************************************************/
54 158
55ev_tstamp 159inline ev_tstamp
56ev_time (void) 160ev_time (void)
57{ 161{
58#if HAVE_REALTIME 162#if EV_USE_REALTIME
59 struct timespec ts; 163 struct timespec ts;
60 clock_gettime (CLOCK_REALTIME, &ts); 164 clock_gettime (CLOCK_REALTIME, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 165 return ts.tv_sec + ts.tv_nsec * 1e-9;
62#else 166#else
63 struct timeval tv; 167 struct timeval tv;
64 gettimeofday (&tv, 0); 168 gettimeofday (&tv, 0);
65 return tv.tv_sec + tv.tv_usec * 1e-6; 169 return tv.tv_sec + tv.tv_usec * 1e-6;
66#endif 170#endif
67} 171}
68 172
69static ev_tstamp 173inline ev_tstamp
70get_clock (void) 174get_clock (void)
71{ 175{
72#if HAVE_MONOTONIC 176#if EV_USE_MONOTONIC
73 if (have_monotonic) 177 if (expect_true (have_monotonic))
74 { 178 {
75 struct timespec ts; 179 struct timespec ts;
76 clock_gettime (CLOCK_MONOTONIC, &ts); 180 clock_gettime (CLOCK_MONOTONIC, &ts);
77 return ts.tv_sec + ts.tv_nsec * 1e-9; 181 return ts.tv_sec + ts.tv_nsec * 1e-9;
78 } 182 }
79#endif 183#endif
80 184
81 return ev_time (); 185 return ev_time ();
82} 186}
83 187
188ev_tstamp
189ev_now (EV_P)
190{
191 return rt_now;
192}
193
194#define array_roundsize(base,n) ((n) | 4 & ~3)
195
84#define array_needsize(base,cur,cnt,init) \ 196#define array_needsize(base,cur,cnt,init) \
85 if ((cnt) > cur) \ 197 if (expect_false ((cnt) > cur)) \
86 { \ 198 { \
87 int newcnt = cur ? cur << 1 : 16; \ 199 int newcnt = cur; \
200 do \
201 { \
202 newcnt = array_roundsize (base, newcnt << 1); \
203 } \
204 while ((cnt) > newcnt); \
205 \
88 base = realloc (base, sizeof (*base) * (newcnt)); \ 206 base = realloc (base, sizeof (*base) * (newcnt)); \
89 init (base + cur, newcnt - cur); \ 207 init (base + cur, newcnt - cur); \
90 cur = newcnt; \ 208 cur = newcnt; \
91 } 209 }
92 210
93/*****************************************************************************/ 211/*****************************************************************************/
94 212
95typedef struct 213typedef struct
96{ 214{
97 struct ev_io *head; 215 struct ev_watcher_list *head;
98 unsigned char wev, rev; /* want, received event set */ 216 unsigned char events;
217 unsigned char reify;
99} ANFD; 218} ANFD;
100 219
101static ANFD *anfds; 220static ANFD *anfds;
102static int anfdmax; 221static int anfdmax;
103 222
104static int *fdchanges;
105static int fdchangemax, fdchangecnt;
106
107static void 223static void
108anfds_init (ANFD *base, int count) 224anfds_init (ANFD *base, int count)
109{ 225{
110 while (count--) 226 while (count--)
111 { 227 {
112 base->head = 0; 228 base->head = 0;
113 base->wev = base->rev = EV_NONE; 229 base->events = EV_NONE;
230 base->reify = 0;
231
114 ++base; 232 ++base;
115 } 233 }
116} 234}
117 235
118typedef struct 236typedef struct
119{ 237{
120 W w; 238 W w;
121 int events; 239 int events;
122} ANPENDING; 240} ANPENDING;
123 241
124static ANPENDING *pendings; 242static ANPENDING *pendings [NUMPRI];
125static int pendingmax, pendingcnt; 243static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
126 244
127static void 245static void
128event (W w, int events) 246event (EV_P_ W w, int events)
129{ 247{
248 if (w->pending)
249 {
250 pendings [ABSPRI (w)][w->pending - 1].events |= events;
251 return;
252 }
253
130 w->pending = ++pendingcnt; 254 w->pending = ++pendingcnt [ABSPRI (w)];
131 array_needsize (pendings, pendingmax, pendingcnt, ); 255 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
132 pendings [pendingcnt - 1].w = w; 256 pendings [ABSPRI (w)][w->pending - 1].w = w;
133 pendings [pendingcnt - 1].events = events; 257 pendings [ABSPRI (w)][w->pending - 1].events = events;
134} 258}
135 259
136static void 260static void
261queue_events (EV_P_ W *events, int eventcnt, int type)
262{
263 int i;
264
265 for (i = 0; i < eventcnt; ++i)
266 event (EV_A_ events [i], type);
267}
268
269static void
137fd_event (int fd, int events) 270fd_event (EV_P_ int fd, int events)
138{ 271{
139 ANFD *anfd = anfds + fd; 272 ANFD *anfd = anfds + fd;
140 struct ev_io *w; 273 struct ev_io *w;
141 274
142 for (w = anfd->head; w; w = w->next) 275 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
143 { 276 {
144 int ev = w->events & events; 277 int ev = w->events & events;
145 278
146 if (ev) 279 if (ev)
147 event ((W)w, ev); 280 event (EV_A_ (W)w, ev);
148 } 281 }
149} 282}
150 283
284/*****************************************************************************/
285
286static int *fdchanges;
287static int fdchangemax, fdchangecnt;
288
151static void 289static void
152queue_events (W *events, int eventcnt, int type) 290fd_reify (EV_P)
153{ 291{
154 int i; 292 int i;
155 293
156 for (i = 0; i < eventcnt; ++i) 294 for (i = 0; i < fdchangecnt; ++i)
157 event (events [i], type); 295 {
296 int fd = fdchanges [i];
297 ANFD *anfd = anfds + fd;
298 struct ev_io *w;
299
300 int events = 0;
301
302 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
303 events |= w->events;
304
305 anfd->reify = 0;
306
307 if (anfd->events != events)
308 {
309 method_modify (EV_A_ fd, anfd->events, events);
310 anfd->events = events;
311 }
312 }
313
314 fdchangecnt = 0;
315}
316
317static void
318fd_change (EV_P_ int fd)
319{
320 if (anfds [fd].reify || fdchangecnt < 0)
321 return;
322
323 anfds [fd].reify = 1;
324
325 ++fdchangecnt;
326 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
327 fdchanges [fdchangecnt - 1] = fd;
328}
329
330static void
331fd_kill (EV_P_ int fd)
332{
333 struct ev_io *w;
334
335 while ((w = (struct ev_io *)anfds [fd].head))
336 {
337 ev_io_stop (EV_A_ w);
338 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
339 }
340}
341
342/* called on EBADF to verify fds */
343static void
344fd_ebadf (EV_P)
345{
346 int fd;
347
348 for (fd = 0; fd < anfdmax; ++fd)
349 if (anfds [fd].events)
350 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
351 fd_kill (EV_A_ fd);
352}
353
354/* called on ENOMEM in select/poll to kill some fds and retry */
355static void
356fd_enomem (EV_P)
357{
358 int fd = anfdmax;
359
360 while (fd--)
361 if (anfds [fd].events)
362 {
363 close (fd);
364 fd_kill (EV_A_ fd);
365 return;
366 }
158} 367}
159 368
160/*****************************************************************************/ 369/*****************************************************************************/
161 370
162static struct ev_timer **timers; 371static struct ev_timer **timers;
… …
208 417
209/*****************************************************************************/ 418/*****************************************************************************/
210 419
211typedef struct 420typedef struct
212{ 421{
213 struct ev_signal *head; 422 struct ev_watcher_list *head;
214 sig_atomic_t gotsig; 423 sig_atomic_t volatile gotsig;
215} ANSIG; 424} ANSIG;
216 425
217static ANSIG *signals; 426static ANSIG *signals;
218static int signalmax; 427static int signalmax;
219 428
220static int sigpipe [2]; 429static int sigpipe [2];
221static sig_atomic_t gotsig; 430static sig_atomic_t volatile gotsig;
222static struct ev_io sigev; 431static struct ev_io sigev;
223 432
224static void 433static void
225signals_init (ANSIG *base, int count) 434signals_init (ANSIG *base, int count)
226{ 435{
227 while (count--) 436 while (count--)
228 { 437 {
229 base->head = 0; 438 base->head = 0;
230 base->gotsig = 0; 439 base->gotsig = 0;
440
231 ++base; 441 ++base;
232 } 442 }
233} 443}
234 444
235static void 445static void
… …
237{ 447{
238 signals [signum - 1].gotsig = 1; 448 signals [signum - 1].gotsig = 1;
239 449
240 if (!gotsig) 450 if (!gotsig)
241 { 451 {
452 int old_errno = errno;
242 gotsig = 1; 453 gotsig = 1;
243 write (sigpipe [1], &gotsig, 1); 454 write (sigpipe [1], &signum, 1);
455 errno = old_errno;
244 } 456 }
245} 457}
246 458
247static void 459static void
248sigcb (struct ev_io *iow, int revents) 460sigcb (EV_P_ struct ev_io *iow, int revents)
249{ 461{
250 struct ev_signal *w; 462 struct ev_watcher_list *w;
251 int sig; 463 int signum;
252 464
465 read (sigpipe [0], &revents, 1);
253 gotsig = 0; 466 gotsig = 0;
254 read (sigpipe [0], &revents, 1);
255 467
256 for (sig = signalmax; sig--; ) 468 for (signum = signalmax; signum--; )
257 if (signals [sig].gotsig) 469 if (signals [signum].gotsig)
258 { 470 {
259 signals [sig].gotsig = 0; 471 signals [signum].gotsig = 0;
260 472
261 for (w = signals [sig].head; w; w = w->next) 473 for (w = signals [signum].head; w; w = w->next)
262 event ((W)w, EV_SIGNAL); 474 event (EV_A_ (W)w, EV_SIGNAL);
263 } 475 }
264} 476}
265 477
266static void 478static void
267siginit (void) 479siginit (EV_P)
268{ 480{
481#ifndef WIN32
269 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 482 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
270 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); 483 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
271 484
272 /* rather than sort out wether we really need nb, set it */ 485 /* rather than sort out wether we really need nb, set it */
273 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 486 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
274 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 487 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
488#endif
275 489
276 evio_set (&sigev, sigpipe [0], EV_READ); 490 ev_io_set (&sigev, sigpipe [0], EV_READ);
277 evio_start (&sigev); 491 ev_io_start (&sigev);
278} 492}
279 493
280/*****************************************************************************/ 494/*****************************************************************************/
281 495
282static struct ev_idle **idles; 496static struct ev_idle **idles;
283static int idlemax, idlecnt; 497static int idlemax, idlecnt;
284 498
499static struct ev_prepare **prepares;
500static int preparemax, preparecnt;
501
285static struct ev_check **checks; 502static struct ev_check **checks;
286static int checkmax, checkcnt; 503static int checkmax, checkcnt;
287 504
288/*****************************************************************************/ 505/*****************************************************************************/
289 506
507static struct ev_child *childs [PID_HASHSIZE];
508static struct ev_signal childev;
509
510#ifndef WIN32
511
512#ifndef WCONTINUED
513# define WCONTINUED 0
514#endif
515
516static void
517child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
518{
519 struct ev_child *w;
520
521 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
522 if (w->pid == pid || !w->pid)
523 {
524 w->priority = sw->priority; /* need to do it *now* */
525 w->rpid = pid;
526 w->rstatus = status;
527 event (EV_A_ (W)w, EV_CHILD);
528 }
529}
530
531static void
532childcb (EV_P_ struct ev_signal *sw, int revents)
533{
534 int pid, status;
535
536 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
537 {
538 /* make sure we are called again until all childs have been reaped */
539 event (EV_A_ (W)sw, EV_SIGNAL);
540
541 child_reap (EV_A_ sw, pid, pid, status);
542 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
543 }
544}
545
546#endif
547
548/*****************************************************************************/
549
550#if EV_USE_KQUEUE
551# include "ev_kqueue.c"
552#endif
290#if HAVE_EPOLL 553#if EV_USE_EPOLL
291# include "ev_epoll.c" 554# include "ev_epoll.c"
292#endif 555#endif
556#if EV_USEV_POLL
557# include "ev_poll.c"
558#endif
293#if HAVE_SELECT 559#if EV_USE_SELECT
294# include "ev_select.c" 560# include "ev_select.c"
295#endif 561#endif
296 562
297int ev_init (int flags) 563int
564ev_version_major (void)
298{ 565{
566 return EV_VERSION_MAJOR;
567}
568
569int
570ev_version_minor (void)
571{
572 return EV_VERSION_MINOR;
573}
574
575/* return true if we are running with elevated privileges and should ignore env variables */
576static int
577enable_secure (void)
578{
579#ifdef WIN32
580 return 0;
581#else
582 return getuid () != geteuid ()
583 || getgid () != getegid ();
584#endif
585}
586
587int
588ev_method (EV_P)
589{
590 return method;
591}
592
593int
594ev_init (EV_P_ int methods)
595{
596 if (!method)
597 {
299#if HAVE_MONOTONIC 598#if EV_USE_MONOTONIC
300 { 599 {
301 struct timespec ts; 600 struct timespec ts;
302 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 601 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
303 have_monotonic = 1; 602 have_monotonic = 1;
304 } 603 }
305#endif 604#endif
306 605
307 ev_now = ev_time (); 606 rt_now = ev_time ();
308 now = get_clock (); 607 mn_now = get_clock ();
608 now_floor = mn_now;
309 diff = ev_now - now; 609 diff = rt_now - mn_now;
310 610
311 if (pipe (sigpipe)) 611 if (pipe (sigpipe))
312 return 0; 612 return 0;
313 613
314 ev_method = EVMETHOD_NONE; 614 if (methods == EVMETHOD_AUTO)
615 if (!enable_secure () && getenv ("LIBmethodS"))
616 methods = atoi (getenv ("LIBmethodS"));
617 else
618 methods = EVMETHOD_ANY;
619
620 method = 0;
621#if EV_USE_KQUEUE
622 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
623#endif
315#if HAVE_EPOLL 624#if EV_USE_EPOLL
316 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 625 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
317#endif 626#endif
627#if EV_USEV_POLL
628 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
629#endif
318#if HAVE_SELECT 630#if EV_USE_SELECT
319 if (ev_method == EVMETHOD_NONE) select_init (flags); 631 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
320#endif 632#endif
321 633
322 if (ev_method) 634 if (method)
323 { 635 {
324 evw_init (&sigev, sigcb); 636 ev_watcher_init (&sigev, sigcb);
637 ev_set_priority (&sigev, EV_MAXPRI);
325 siginit (); 638 siginit (EV_A);
326 }
327 639
640#ifndef WIN32
641 ev_signal_init (&childev, childcb, SIGCHLD);
642 ev_set_priority (&childev, EV_MAXPRI);
643 ev_signal_start (EV_A_ &childev);
644#endif
645 }
646 }
647
328 return ev_method; 648 return method;
329} 649}
330 650
331/*****************************************************************************/ 651/*****************************************************************************/
332 652
333void ev_prefork (void) 653void
654ev_fork_prepare (void)
334{ 655{
335 /* nop */ 656 /* nop */
336} 657}
337 658
659void
338void ev_postfork_parent (void) 660ev_fork_parent (void)
339{ 661{
340 /* nop */ 662 /* nop */
341} 663}
342 664
665void
343void ev_postfork_child (void) 666ev_fork_child (void)
344{ 667{
345#if HAVE_EPOLL 668#if EV_USE_EPOLL
346 if (ev_method == EVMETHOD_EPOLL) 669 if (method == EVMETHOD_EPOLL)
347 epoll_postfork_child (); 670 epoll_postfork_child ();
348#endif 671#endif
349 672
350 evio_stop (&sigev); 673 ev_io_stop (&sigev);
351 close (sigpipe [0]); 674 close (sigpipe [0]);
352 close (sigpipe [1]); 675 close (sigpipe [1]);
353 pipe (sigpipe); 676 pipe (sigpipe);
354 siginit (); 677 siginit ();
355} 678}
356 679
357/*****************************************************************************/ 680/*****************************************************************************/
358 681
359static void 682static void
360fd_reify (void) 683call_pending (EV_P)
361{ 684{
362 int i; 685 int pri;
363 686
364 for (i = 0; i < fdchangecnt; ++i) 687 for (pri = NUMPRI; pri--; )
365 { 688 while (pendingcnt [pri])
366 int fd = fdchanges [i];
367 ANFD *anfd = anfds + fd;
368 struct ev_io *w;
369
370 int wev = 0;
371
372 for (w = anfd->head; w; w = w->next)
373 wev |= w->events;
374
375 if (anfd->wev != wev)
376 { 689 {
377 method_modify (fd, anfd->wev, wev); 690 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
378 anfd->wev = wev;
379 }
380 }
381 691
382 fdchangecnt = 0;
383}
384
385static void
386call_pending ()
387{
388 int i;
389
390 for (i = 0; i < pendingcnt; ++i)
391 {
392 ANPENDING *p = pendings + i;
393
394 if (p->w) 692 if (p->w)
395 { 693 {
396 p->w->pending = 0; 694 p->w->pending = 0;
397 p->w->cb (p->w, p->events); 695 p->w->cb (EV_A_ p->w, p->events);
398 } 696 }
399 } 697 }
400
401 pendingcnt = 0;
402} 698}
403 699
404static void 700static void
405timers_reify () 701timers_reify (EV_P)
406{ 702{
407 while (timercnt && timers [0]->at <= now) 703 while (timercnt && timers [0]->at <= mn_now)
408 { 704 {
409 struct ev_timer *w = timers [0]; 705 struct ev_timer *w = timers [0];
410 706
411 /* first reschedule or stop timer */ 707 /* first reschedule or stop timer */
412 if (w->repeat) 708 if (w->repeat)
413 { 709 {
710 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
414 w->at = now + w->repeat; 711 w->at = mn_now + w->repeat;
415 assert (("timer timeout in the past, negative repeat?", w->at > now));
416 downheap ((WT *)timers, timercnt, 0); 712 downheap ((WT *)timers, timercnt, 0);
417 } 713 }
418 else 714 else
419 evtimer_stop (w); /* nonrepeating: stop timer */ 715 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
420 716
421 event ((W)w, EV_TIMEOUT); 717 event ((W)w, EV_TIMEOUT);
422 } 718 }
423} 719}
424 720
425static void 721static void
426periodics_reify () 722periodics_reify (EV_P)
427{ 723{
428 while (periodiccnt && periodics [0]->at <= ev_now) 724 while (periodiccnt && periodics [0]->at <= rt_now)
429 { 725 {
430 struct ev_periodic *w = periodics [0]; 726 struct ev_periodic *w = periodics [0];
431 727
432 /* first reschedule or stop timer */ 728 /* first reschedule or stop timer */
433 if (w->interval) 729 if (w->interval)
434 { 730 {
435 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 731 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
436 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 732 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
437 downheap ((WT *)periodics, periodiccnt, 0); 733 downheap ((WT *)periodics, periodiccnt, 0);
438 } 734 }
439 else 735 else
440 evperiodic_stop (w); /* nonrepeating: stop timer */ 736 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
441 737
442 event ((W)w, EV_TIMEOUT); 738 event (EV_A_ (W)w, EV_PERIODIC);
443 } 739 }
444} 740}
445 741
446static void 742static void
447periodics_reschedule (ev_tstamp diff) 743periodics_reschedule (EV_P_ ev_tstamp diff)
448{ 744{
449 int i; 745 int i;
450 746
451 /* adjust periodics after time jump */ 747 /* adjust periodics after time jump */
452 for (i = 0; i < periodiccnt; ++i) 748 for (i = 0; i < periodiccnt; ++i)
453 { 749 {
454 struct ev_periodic *w = periodics [i]; 750 struct ev_periodic *w = periodics [i];
455 751
456 if (w->interval) 752 if (w->interval)
457 { 753 {
458 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 754 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
459 755
460 if (fabs (diff) >= 1e-4) 756 if (fabs (diff) >= 1e-4)
461 { 757 {
462 evperiodic_stop (w); 758 ev_periodic_stop (EV_A_ w);
463 evperiodic_start (w); 759 ev_periodic_start (EV_A_ w);
464 760
465 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 761 i = 0; /* restart loop, inefficient, but time jumps should be rare */
466 } 762 }
467 } 763 }
468 } 764 }
469} 765}
470 766
767inline int
768time_update_monotonic (EV_P)
769{
770 mn_now = get_clock ();
771
772 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
773 {
774 rt_now = mn_now + diff;
775 return 0;
776 }
777 else
778 {
779 now_floor = mn_now;
780 rt_now = ev_time ();
781 return 1;
782 }
783}
784
471static void 785static void
472time_update () 786time_update (EV_P)
473{ 787{
474 int i; 788 int i;
475 789
476 ev_now = ev_time (); 790#if EV_USE_MONOTONIC
477
478 if (have_monotonic) 791 if (expect_true (have_monotonic))
479 { 792 {
480 ev_tstamp odiff = diff; 793 if (time_update_monotonic (EV_A))
481
482 for (i = 4; --i; ) /* loop a few times, before making important decisions */
483 { 794 {
484 now = get_clock (); 795 ev_tstamp odiff = diff;
796
797 for (i = 4; --i; ) /* loop a few times, before making important decisions */
798 {
485 diff = ev_now - now; 799 diff = rt_now - mn_now;
486 800
487 if (fabs (odiff - diff) < MIN_TIMEJUMP) 801 if (fabs (odiff - diff) < MIN_TIMEJUMP)
488 return; /* all is well */ 802 return; /* all is well */
489 803
490 ev_now = ev_time (); 804 rt_now = ev_time ();
805 mn_now = get_clock ();
806 now_floor = mn_now;
807 }
808
809 periodics_reschedule (EV_A_ diff - odiff);
810 /* no timer adjustment, as the monotonic clock doesn't jump */
491 } 811 }
492
493 periodics_reschedule (diff - odiff);
494 /* no timer adjustment, as the monotonic clock doesn't jump */
495 } 812 }
496 else 813 else
814#endif
497 { 815 {
498 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 816 rt_now = ev_time ();
817
818 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
499 { 819 {
500 periodics_reschedule (ev_now - now); 820 periodics_reschedule (EV_A_ rt_now - mn_now);
501 821
502 /* adjust timers. this is easy, as the offset is the same for all */ 822 /* adjust timers. this is easy, as the offset is the same for all */
503 for (i = 0; i < timercnt; ++i) 823 for (i = 0; i < timercnt; ++i)
504 timers [i]->at += diff; 824 timers [i]->at += diff;
505 } 825 }
506 826
507 now = ev_now; 827 mn_now = rt_now;
508 } 828 }
509} 829}
510 830
511int ev_loop_done; 831void
832ev_ref (EV_P)
833{
834 ++activecnt;
835}
512 836
837void
838ev_unref (EV_P)
839{
840 --activecnt;
841}
842
843static int loop_done;
844
845void
513void ev_loop (int flags) 846ev_loop (EV_P_ int flags)
514{ 847{
515 double block; 848 double block;
516 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 849 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
517
518 if (checkcnt)
519 {
520 queue_events ((W *)checks, checkcnt, EV_CHECK);
521 call_pending ();
522 }
523 850
524 do 851 do
525 { 852 {
853 /* queue check watchers (and execute them) */
854 if (expect_false (preparecnt))
855 {
856 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
857 call_pending (EV_A);
858 }
859
526 /* update fd-related kernel structures */ 860 /* update fd-related kernel structures */
527 fd_reify (); 861 fd_reify (EV_A);
528 862
529 /* calculate blocking time */ 863 /* calculate blocking time */
530 864
531 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 865 /* we only need this for !monotonic clockor timers, but as we basically
866 always have timers, we just calculate it always */
867#if EV_USE_MONOTONIC
868 if (expect_true (have_monotonic))
869 time_update_monotonic (EV_A);
870 else
871#endif
872 {
532 ev_now = ev_time (); 873 rt_now = ev_time ();
874 mn_now = rt_now;
875 }
533 876
534 if (flags & EVLOOP_NONBLOCK || idlecnt) 877 if (flags & EVLOOP_NONBLOCK || idlecnt)
535 block = 0.; 878 block = 0.;
536 else 879 else
537 { 880 {
538 block = MAX_BLOCKTIME; 881 block = MAX_BLOCKTIME;
539 882
540 if (timercnt) 883 if (timercnt)
541 { 884 {
542 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 885 ev_tstamp to = timers [0]->at - mn_now + method_fudge;
543 if (block > to) block = to; 886 if (block > to) block = to;
544 } 887 }
545 888
546 if (periodiccnt) 889 if (periodiccnt)
547 { 890 {
548 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 891 ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
549 if (block > to) block = to; 892 if (block > to) block = to;
550 } 893 }
551 894
552 if (block < 0.) block = 0.; 895 if (block < 0.) block = 0.;
553 } 896 }
554 897
555 method_poll (block); 898 method_poll (EV_A_ block);
556 899
557 /* update ev_now, do magic */ 900 /* update rt_now, do magic */
558 time_update (); 901 time_update (EV_A);
559 902
560 /* queue pending timers and reschedule them */ 903 /* queue pending timers and reschedule them */
904 timers_reify (EV_A); /* relative timers called last */
561 periodics_reify (); /* absolute timers first */ 905 periodics_reify (EV_A); /* absolute timers called first */
562 timers_reify (); /* relative timers second */
563 906
564 /* queue idle watchers unless io or timers are pending */ 907 /* queue idle watchers unless io or timers are pending */
565 if (!pendingcnt) 908 if (!pendingcnt)
566 queue_events ((W *)idles, idlecnt, EV_IDLE); 909 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
567 910
568 /* queue check and possibly idle watchers */ 911 /* queue check watchers, to be executed first */
912 if (checkcnt)
569 queue_events ((W *)checks, checkcnt, EV_CHECK); 913 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
570 914
571 call_pending (); 915 call_pending (EV_A);
916 printf ("activecnt %d\n", activecnt);//D
572 } 917 }
573 while (!ev_loop_done); 918 while (activecnt && !loop_done);
574 919
575 if (ev_loop_done != 2) 920 if (loop_done != 2)
576 ev_loop_done = 0; 921 loop_done = 0;
922}
923
924void
925ev_unloop (EV_P_ int how)
926{
927 loop_done = how;
577} 928}
578 929
579/*****************************************************************************/ 930/*****************************************************************************/
580 931
581static void 932inline void
582wlist_add (WL *head, WL elem) 933wlist_add (WL *head, WL elem)
583{ 934{
584 elem->next = *head; 935 elem->next = *head;
585 *head = elem; 936 *head = elem;
586} 937}
587 938
588static void 939inline void
589wlist_del (WL *head, WL elem) 940wlist_del (WL *head, WL elem)
590{ 941{
591 while (*head) 942 while (*head)
592 { 943 {
593 if (*head == elem) 944 if (*head == elem)
… …
598 949
599 head = &(*head)->next; 950 head = &(*head)->next;
600 } 951 }
601} 952}
602 953
603static void 954inline void
955ev_clear_pending (EV_P_ W w)
956{
957 if (w->pending)
958 {
959 pendings [ABSPRI (w)][w->pending - 1].w = 0;
960 w->pending = 0;
961 }
962}
963
964inline void
604ev_start (W w, int active) 965ev_start (EV_P_ W w, int active)
605{ 966{
606 w->pending = 0; 967 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
968 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
969
607 w->active = active; 970 w->active = active;
971 ev_ref (EV_A);
608} 972}
609 973
610static void 974inline void
611ev_stop (W w) 975ev_stop (EV_P_ W w)
612{ 976{
613 if (w->pending) 977 ev_unref (EV_A);
614 pendings [w->pending - 1].w = 0;
615
616 w->active = 0; 978 w->active = 0;
617} 979}
618 980
619/*****************************************************************************/ 981/*****************************************************************************/
620 982
621void 983void
622evio_start (struct ev_io *w) 984ev_io_start (EV_P_ struct ev_io *w)
623{ 985{
986 int fd = w->fd;
987
624 if (ev_is_active (w)) 988 if (ev_is_active (w))
625 return; 989 return;
626 990
627 int fd = w->fd; 991 assert (("ev_io_start called with negative fd", fd >= 0));
628 992
629 ev_start ((W)w, 1); 993 ev_start (EV_A_ (W)w, 1);
630 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 994 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
631 wlist_add ((WL *)&anfds[fd].head, (WL)w); 995 wlist_add ((WL *)&anfds[fd].head, (WL)w);
632 996
633 ++fdchangecnt; 997 fd_change (EV_A_ fd);
634 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
635 fdchanges [fdchangecnt - 1] = fd;
636} 998}
637 999
638void 1000void
639evio_stop (struct ev_io *w) 1001ev_io_stop (EV_P_ struct ev_io *w)
640{ 1002{
1003 ev_clear_pending (EV_A_ (W)w);
641 if (!ev_is_active (w)) 1004 if (!ev_is_active (w))
642 return; 1005 return;
643 1006
644 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1007 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
645 ev_stop ((W)w); 1008 ev_stop (EV_A_ (W)w);
646 1009
647 ++fdchangecnt; 1010 fd_change (EV_A_ w->fd);
648 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
649 fdchanges [fdchangecnt - 1] = w->fd;
650} 1011}
651 1012
652
653void 1013void
654evtimer_start (struct ev_timer *w) 1014ev_timer_start (EV_P_ struct ev_timer *w)
655{ 1015{
656 if (ev_is_active (w)) 1016 if (ev_is_active (w))
657 return; 1017 return;
658 1018
659 w->at += now; 1019 w->at += mn_now;
660 1020
661 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1021 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
662 1022
663 ev_start ((W)w, ++timercnt); 1023 ev_start (EV_A_ (W)w, ++timercnt);
664 array_needsize (timers, timermax, timercnt, ); 1024 array_needsize (timers, timermax, timercnt, );
665 timers [timercnt - 1] = w; 1025 timers [timercnt - 1] = w;
666 upheap ((WT *)timers, timercnt - 1); 1026 upheap ((WT *)timers, timercnt - 1);
667} 1027}
668 1028
669void 1029void
670evtimer_stop (struct ev_timer *w) 1030ev_timer_stop (EV_P_ struct ev_timer *w)
671{ 1031{
1032 ev_clear_pending (EV_A_ (W)w);
672 if (!ev_is_active (w)) 1033 if (!ev_is_active (w))
673 return; 1034 return;
674 1035
675 if (w->active < timercnt--) 1036 if (w->active < timercnt--)
676 { 1037 {
… …
678 downheap ((WT *)timers, timercnt, w->active - 1); 1039 downheap ((WT *)timers, timercnt, w->active - 1);
679 } 1040 }
680 1041
681 w->at = w->repeat; 1042 w->at = w->repeat;
682 1043
683 ev_stop ((W)w); 1044 ev_stop (EV_A_ (W)w);
684} 1045}
685 1046
686void 1047void
687evtimer_again (struct ev_timer *w) 1048ev_timer_again (EV_P_ struct ev_timer *w)
688{ 1049{
689 if (ev_is_active (w)) 1050 if (ev_is_active (w))
690 { 1051 {
691 if (w->repeat) 1052 if (w->repeat)
692 { 1053 {
693 w->at = now + w->repeat; 1054 w->at = mn_now + w->repeat;
694 downheap ((WT *)timers, timercnt, w->active - 1); 1055 downheap ((WT *)timers, timercnt, w->active - 1);
695 } 1056 }
696 else 1057 else
697 evtimer_stop (w); 1058 ev_timer_stop (EV_A_ w);
698 } 1059 }
699 else if (w->repeat) 1060 else if (w->repeat)
700 evtimer_start (w); 1061 ev_timer_start (EV_A_ w);
701} 1062}
702 1063
703void 1064void
704evperiodic_start (struct ev_periodic *w) 1065ev_periodic_start (EV_P_ struct ev_periodic *w)
705{ 1066{
706 if (ev_is_active (w)) 1067 if (ev_is_active (w))
707 return; 1068 return;
708 1069
709 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1070 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
710 1071
711 /* this formula differs from the one in periodic_reify because we do not always round up */ 1072 /* this formula differs from the one in periodic_reify because we do not always round up */
712 if (w->interval) 1073 if (w->interval)
713 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1074 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
714 1075
715 ev_start ((W)w, ++periodiccnt); 1076 ev_start (EV_A_ (W)w, ++periodiccnt);
716 array_needsize (periodics, periodicmax, periodiccnt, ); 1077 array_needsize (periodics, periodicmax, periodiccnt, );
717 periodics [periodiccnt - 1] = w; 1078 periodics [periodiccnt - 1] = w;
718 upheap ((WT *)periodics, periodiccnt - 1); 1079 upheap ((WT *)periodics, periodiccnt - 1);
719} 1080}
720 1081
721void 1082void
722evperiodic_stop (struct ev_periodic *w) 1083ev_periodic_stop (EV_P_ struct ev_periodic *w)
723{ 1084{
1085 ev_clear_pending (EV_A_ (W)w);
724 if (!ev_is_active (w)) 1086 if (!ev_is_active (w))
725 return; 1087 return;
726 1088
727 if (w->active < periodiccnt--) 1089 if (w->active < periodiccnt--)
728 { 1090 {
729 periodics [w->active - 1] = periodics [periodiccnt]; 1091 periodics [w->active - 1] = periodics [periodiccnt];
730 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1092 downheap ((WT *)periodics, periodiccnt, w->active - 1);
731 } 1093 }
732 1094
733 ev_stop ((W)w); 1095 ev_stop (EV_A_ (W)w);
734} 1096}
735 1097
1098#ifndef SA_RESTART
1099# define SA_RESTART 0
1100#endif
1101
736void 1102void
737evsignal_start (struct ev_signal *w) 1103ev_signal_start (EV_P_ struct ev_signal *w)
738{ 1104{
739 if (ev_is_active (w)) 1105 if (ev_is_active (w))
740 return; 1106 return;
741 1107
1108 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1109
742 ev_start ((W)w, 1); 1110 ev_start (EV_A_ (W)w, 1);
743 array_needsize (signals, signalmax, w->signum, signals_init); 1111 array_needsize (signals, signalmax, w->signum, signals_init);
744 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1112 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
745 1113
746 if (!w->next) 1114 if (!w->next)
747 { 1115 {
748 struct sigaction sa; 1116 struct sigaction sa;
749 sa.sa_handler = sighandler; 1117 sa.sa_handler = sighandler;
750 sigfillset (&sa.sa_mask); 1118 sigfillset (&sa.sa_mask);
751 sa.sa_flags = 0; 1119 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
752 sigaction (w->signum, &sa, 0); 1120 sigaction (w->signum, &sa, 0);
753 } 1121 }
754} 1122}
755 1123
756void 1124void
757evsignal_stop (struct ev_signal *w) 1125ev_signal_stop (EV_P_ struct ev_signal *w)
758{ 1126{
1127 ev_clear_pending (EV_A_ (W)w);
759 if (!ev_is_active (w)) 1128 if (!ev_is_active (w))
760 return; 1129 return;
761 1130
762 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1131 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
763 ev_stop ((W)w); 1132 ev_stop (EV_A_ (W)w);
764 1133
765 if (!signals [w->signum - 1].head) 1134 if (!signals [w->signum - 1].head)
766 signal (w->signum, SIG_DFL); 1135 signal (w->signum, SIG_DFL);
767} 1136}
768 1137
1138void
769void evidle_start (struct ev_idle *w) 1139ev_idle_start (EV_P_ struct ev_idle *w)
770{ 1140{
771 if (ev_is_active (w)) 1141 if (ev_is_active (w))
772 return; 1142 return;
773 1143
774 ev_start ((W)w, ++idlecnt); 1144 ev_start (EV_A_ (W)w, ++idlecnt);
775 array_needsize (idles, idlemax, idlecnt, ); 1145 array_needsize (idles, idlemax, idlecnt, );
776 idles [idlecnt - 1] = w; 1146 idles [idlecnt - 1] = w;
777} 1147}
778 1148
1149void
779void evidle_stop (struct ev_idle *w) 1150ev_idle_stop (EV_P_ struct ev_idle *w)
780{ 1151{
1152 ev_clear_pending (EV_A_ (W)w);
1153 if (ev_is_active (w))
1154 return;
1155
781 idles [w->active - 1] = idles [--idlecnt]; 1156 idles [w->active - 1] = idles [--idlecnt];
782 ev_stop ((W)w); 1157 ev_stop (EV_A_ (W)w);
783} 1158}
784 1159
785void evcheck_start (struct ev_check *w) 1160void
1161ev_prepare_start (EV_P_ struct ev_prepare *w)
786{ 1162{
787 if (ev_is_active (w)) 1163 if (ev_is_active (w))
788 return; 1164 return;
789 1165
1166 ev_start (EV_A_ (W)w, ++preparecnt);
1167 array_needsize (prepares, preparemax, preparecnt, );
1168 prepares [preparecnt - 1] = w;
1169}
1170
1171void
1172ev_prepare_stop (EV_P_ struct ev_prepare *w)
1173{
1174 ev_clear_pending (EV_A_ (W)w);
1175 if (ev_is_active (w))
1176 return;
1177
1178 prepares [w->active - 1] = prepares [--preparecnt];
1179 ev_stop (EV_A_ (W)w);
1180}
1181
1182void
1183ev_check_start (EV_P_ struct ev_check *w)
1184{
1185 if (ev_is_active (w))
1186 return;
1187
790 ev_start ((W)w, ++checkcnt); 1188 ev_start (EV_A_ (W)w, ++checkcnt);
791 array_needsize (checks, checkmax, checkcnt, ); 1189 array_needsize (checks, checkmax, checkcnt, );
792 checks [checkcnt - 1] = w; 1190 checks [checkcnt - 1] = w;
793} 1191}
794 1192
1193void
795void evcheck_stop (struct ev_check *w) 1194ev_check_stop (EV_P_ struct ev_check *w)
796{ 1195{
1196 ev_clear_pending (EV_A_ (W)w);
1197 if (ev_is_active (w))
1198 return;
1199
797 checks [w->active - 1] = checks [--checkcnt]; 1200 checks [w->active - 1] = checks [--checkcnt];
798 ev_stop ((W)w); 1201 ev_stop (EV_A_ (W)w);
1202}
1203
1204void
1205ev_child_start (EV_P_ struct ev_child *w)
1206{
1207 if (ev_is_active (w))
1208 return;
1209
1210 ev_start (EV_A_ (W)w, 1);
1211 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1212}
1213
1214void
1215ev_child_stop (EV_P_ struct ev_child *w)
1216{
1217 ev_clear_pending (EV_A_ (W)w);
1218 if (ev_is_active (w))
1219 return;
1220
1221 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1222 ev_stop (EV_A_ (W)w);
799} 1223}
800 1224
801/*****************************************************************************/ 1225/*****************************************************************************/
802 1226
1227struct ev_once
1228{
1229 struct ev_io io;
1230 struct ev_timer to;
1231 void (*cb)(int revents, void *arg);
1232 void *arg;
1233};
1234
1235static void
1236once_cb (EV_P_ struct ev_once *once, int revents)
1237{
1238 void (*cb)(int revents, void *arg) = once->cb;
1239 void *arg = once->arg;
1240
1241 ev_io_stop (EV_A_ &once->io);
1242 ev_timer_stop (EV_A_ &once->to);
1243 free (once);
1244
1245 cb (revents, arg);
1246}
1247
1248static void
1249once_cb_io (EV_P_ struct ev_io *w, int revents)
1250{
1251 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1252}
1253
1254static void
1255once_cb_to (EV_P_ struct ev_timer *w, int revents)
1256{
1257 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1258}
1259
1260void
1261ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1262{
1263 struct ev_once *once = malloc (sizeof (struct ev_once));
1264
1265 if (!once)
1266 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1267 else
1268 {
1269 once->cb = cb;
1270 once->arg = arg;
1271
1272 ev_watcher_init (&once->io, once_cb_io);
1273 if (fd >= 0)
1274 {
1275 ev_io_set (&once->io, fd, events);
1276 ev_io_start (EV_A_ &once->io);
1277 }
1278
1279 ev_watcher_init (&once->to, once_cb_to);
1280 if (timeout >= 0.)
1281 {
1282 ev_timer_set (&once->to, timeout, 0.);
1283 ev_timer_start (EV_A_ &once->to);
1284 }
1285 }
1286}
1287
1288/*****************************************************************************/
1289
803#if 0 1290#if 0
804 1291
805struct ev_io wio; 1292struct ev_io wio;
806 1293
807static void 1294static void
… …
812 1299
813static void 1300static void
814ocb (struct ev_timer *w, int revents) 1301ocb (struct ev_timer *w, int revents)
815{ 1302{
816 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 1303 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
817 evtimer_stop (w); 1304 ev_timer_stop (w);
818 evtimer_start (w); 1305 ev_timer_start (w);
819} 1306}
820 1307
821static void 1308static void
822scb (struct ev_signal *w, int revents) 1309scb (struct ev_signal *w, int revents)
823{ 1310{
824 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 1311 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
825 evio_stop (&wio); 1312 ev_io_stop (&wio);
826 evio_start (&wio); 1313 ev_io_start (&wio);
827} 1314}
828 1315
829static void 1316static void
830gcb (struct ev_signal *w, int revents) 1317gcb (struct ev_signal *w, int revents)
831{ 1318{
… …
835 1322
836int main (void) 1323int main (void)
837{ 1324{
838 ev_init (0); 1325 ev_init (0);
839 1326
840 evio_init (&wio, sin_cb, 0, EV_READ); 1327 ev_io_init (&wio, sin_cb, 0, EV_READ);
841 evio_start (&wio); 1328 ev_io_start (&wio);
842 1329
843 struct ev_timer t[10000]; 1330 struct ev_timer t[10000];
844 1331
845#if 0 1332#if 0
846 int i; 1333 int i;
847 for (i = 0; i < 10000; ++i) 1334 for (i = 0; i < 10000; ++i)
848 { 1335 {
849 struct ev_timer *w = t + i; 1336 struct ev_timer *w = t + i;
850 evw_init (w, ocb, i); 1337 ev_watcher_init (w, ocb, i);
851 evtimer_init_abs (w, ocb, drand48 (), 0.99775533); 1338 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
852 evtimer_start (w); 1339 ev_timer_start (w);
853 if (drand48 () < 0.5) 1340 if (drand48 () < 0.5)
854 evtimer_stop (w); 1341 ev_timer_stop (w);
855 } 1342 }
856#endif 1343#endif
857 1344
858 struct ev_timer t1; 1345 struct ev_timer t1;
859 evtimer_init (&t1, ocb, 5, 10); 1346 ev_timer_init (&t1, ocb, 5, 10);
860 evtimer_start (&t1); 1347 ev_timer_start (&t1);
861 1348
862 struct ev_signal sig; 1349 struct ev_signal sig;
863 evsignal_init (&sig, scb, SIGQUIT); 1350 ev_signal_init (&sig, scb, SIGQUIT);
864 evsignal_start (&sig); 1351 ev_signal_start (&sig);
865 1352
866 struct ev_check cw; 1353 struct ev_check cw;
867 evcheck_init (&cw, gcb); 1354 ev_check_init (&cw, gcb);
868 evcheck_start (&cw); 1355 ev_check_start (&cw);
869 1356
870 struct ev_idle iw; 1357 struct ev_idle iw;
871 evidle_init (&iw, gcb); 1358 ev_idle_init (&iw, gcb);
872 evidle_start (&iw); 1359 ev_idle_start (&iw);
873 1360
874 ev_loop (0); 1361 ev_loop (0);
875 1362
876 return 0; 1363 return 0;
877} 1364}

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