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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 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"
38 99
39struct ev_watcher { 100#if __GNUC__ >= 3
40 EV_WATCHER (ev_watcher); 101# define expect(expr,value) __builtin_expect ((expr),(value))
41}; 102# define inline inline
103#else
104# define expect(expr,value) (expr)
105# define inline static
106#endif
42 107
43struct ev_watcher_list { 108#define expect_false(expr) expect ((expr) != 0, 0)
44 EV_WATCHER_LIST (ev_watcher_list); 109#define expect_true(expr) expect ((expr) != 0, 1)
45};
46 110
47struct ev_watcher_time { 111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48 EV_WATCHER_TIME (ev_watcher_time); 112#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49};
50 113
51typedef struct ev_watcher *W; 114typedef struct ev_watcher *W;
52typedef struct ev_watcher_list *WL; 115typedef struct ev_watcher_list *WL;
53typedef struct ev_watcher_time *WT; 116typedef struct ev_watcher_time *WT;
54 117
55static ev_tstamp now, diff; /* monotonic clock */ 118static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
56ev_tstamp ev_now; 119static ev_tstamp rt_now;
57int ev_method; 120static int method;
58 121
59static int have_monotonic; /* runtime */ 122static int have_monotonic; /* runtime */
60 123
61static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
62static void (*method_modify)(int fd, int oev, int nev); 125static void (*method_modify)(EV_P_ int fd, int oev, int nev);
63static 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
64 156
65/*****************************************************************************/ 157/*****************************************************************************/
66 158
67ev_tstamp 159inline ev_tstamp
68ev_time (void) 160ev_time (void)
69{ 161{
70#if HAVE_REALTIME 162#if EV_USE_REALTIME
71 struct timespec ts; 163 struct timespec ts;
72 clock_gettime (CLOCK_REALTIME, &ts); 164 clock_gettime (CLOCK_REALTIME, &ts);
73 return ts.tv_sec + ts.tv_nsec * 1e-9; 165 return ts.tv_sec + ts.tv_nsec * 1e-9;
74#else 166#else
75 struct timeval tv; 167 struct timeval tv;
76 gettimeofday (&tv, 0); 168 gettimeofday (&tv, 0);
77 return tv.tv_sec + tv.tv_usec * 1e-6; 169 return tv.tv_sec + tv.tv_usec * 1e-6;
78#endif 170#endif
79} 171}
80 172
81static ev_tstamp 173inline ev_tstamp
82get_clock (void) 174get_clock (void)
83{ 175{
84#if HAVE_MONOTONIC 176#if EV_USE_MONOTONIC
85 if (have_monotonic) 177 if (expect_true (have_monotonic))
86 { 178 {
87 struct timespec ts; 179 struct timespec ts;
88 clock_gettime (CLOCK_MONOTONIC, &ts); 180 clock_gettime (CLOCK_MONOTONIC, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 181 return ts.tv_sec + ts.tv_nsec * 1e-9;
90 } 182 }
91#endif 183#endif
92 184
93 return ev_time (); 185 return ev_time ();
94} 186}
95 187
188ev_tstamp
189ev_now (EV_P)
190{
191 return rt_now;
192}
193
194#define array_roundsize(base,n) ((n) | 4 & ~3)
195
96#define array_needsize(base,cur,cnt,init) \ 196#define array_needsize(base,cur,cnt,init) \
97 if ((cnt) > cur) \ 197 if (expect_false ((cnt) > cur)) \
98 { \ 198 { \
99 int newcnt = cur ? cur << 1 : 16; \ 199 int newcnt = cur; \
100 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 200 do \
201 { \
202 newcnt = array_roundsize (base, newcnt << 1); \
203 } \
204 while ((cnt) > newcnt); \
205 \
101 base = realloc (base, sizeof (*base) * (newcnt)); \ 206 base = realloc (base, sizeof (*base) * (newcnt)); \
102 init (base + cur, newcnt - cur); \ 207 init (base + cur, newcnt - cur); \
103 cur = newcnt; \ 208 cur = newcnt; \
104 } 209 }
105 210
106/*****************************************************************************/ 211/*****************************************************************************/
107 212
108typedef struct 213typedef struct
109{ 214{
110 struct ev_io *head; 215 struct ev_watcher_list *head;
111 unsigned char wev, rev; /* want, received event set */ 216 unsigned char events;
217 unsigned char reify;
112} ANFD; 218} ANFD;
113 219
114static ANFD *anfds; 220static ANFD *anfds;
115static int anfdmax; 221static int anfdmax;
116 222
117static int *fdchanges;
118static int fdchangemax, fdchangecnt;
119
120static void 223static void
121anfds_init (ANFD *base, int count) 224anfds_init (ANFD *base, int count)
122{ 225{
123 while (count--) 226 while (count--)
124 { 227 {
125 base->head = 0; 228 base->head = 0;
126 base->wev = base->rev = EV_NONE; 229 base->events = EV_NONE;
230 base->reify = 0;
231
127 ++base; 232 ++base;
128 } 233 }
129} 234}
130 235
131typedef struct 236typedef struct
132{ 237{
133 W w; 238 W w;
134 int events; 239 int events;
135} ANPENDING; 240} ANPENDING;
136 241
137static ANPENDING *pendings; 242static ANPENDING *pendings [NUMPRI];
138static int pendingmax, pendingcnt; 243static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
139 244
140static void 245static void
141event (W w, int events) 246event (EV_P_ W w, int events)
142{ 247{
248 if (w->pending)
249 {
250 pendings [ABSPRI (w)][w->pending - 1].events |= events;
251 return;
252 }
253
143 w->pending = ++pendingcnt; 254 w->pending = ++pendingcnt [ABSPRI (w)];
144 array_needsize (pendings, pendingmax, pendingcnt, ); 255 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145 pendings [pendingcnt - 1].w = w; 256 pendings [ABSPRI (w)][w->pending - 1].w = w;
146 pendings [pendingcnt - 1].events = events; 257 pendings [ABSPRI (w)][w->pending - 1].events = events;
147} 258}
148 259
149static 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
150fd_event (int fd, int events) 270fd_event (EV_P_ int fd, int events)
151{ 271{
152 ANFD *anfd = anfds + fd; 272 ANFD *anfd = anfds + fd;
153 struct ev_io *w; 273 struct ev_io *w;
154 274
155 for (w = anfd->head; w; w = w->next) 275 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
156 { 276 {
157 int ev = w->events & events; 277 int ev = w->events & events;
158 278
159 if (ev) 279 if (ev)
160 event ((W)w, ev); 280 event (EV_A_ (W)w, ev);
161 } 281 }
162} 282}
163 283
284/*****************************************************************************/
285
286static int *fdchanges;
287static int fdchangemax, fdchangecnt;
288
164static void 289static void
165queue_events (W *events, int eventcnt, int type) 290fd_reify (EV_P)
166{ 291{
167 int i; 292 int i;
168 293
169 for (i = 0; i < eventcnt; ++i) 294 for (i = 0; i < fdchangecnt; ++i)
170 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 }
171} 367}
172 368
173/*****************************************************************************/ 369/*****************************************************************************/
174 370
175static struct ev_timer **timers; 371static struct ev_timer **timers;
… …
221 417
222/*****************************************************************************/ 418/*****************************************************************************/
223 419
224typedef struct 420typedef struct
225{ 421{
226 struct ev_signal *head; 422 struct ev_watcher_list *head;
227 sig_atomic_t gotsig; 423 sig_atomic_t volatile gotsig;
228} ANSIG; 424} ANSIG;
229 425
230static ANSIG *signals; 426static ANSIG *signals;
231static int signalmax; 427static int signalmax;
232 428
233static int sigpipe [2]; 429static int sigpipe [2];
234static sig_atomic_t gotsig; 430static sig_atomic_t volatile gotsig;
235static struct ev_io sigev; 431static struct ev_io sigev;
236 432
237static void 433static void
238signals_init (ANSIG *base, int count) 434signals_init (ANSIG *base, int count)
239{ 435{
240 while (count--) 436 while (count--)
241 { 437 {
242 base->head = 0; 438 base->head = 0;
243 base->gotsig = 0; 439 base->gotsig = 0;
440
244 ++base; 441 ++base;
245 } 442 }
246} 443}
247 444
248static void 445static void
… …
250{ 447{
251 signals [signum - 1].gotsig = 1; 448 signals [signum - 1].gotsig = 1;
252 449
253 if (!gotsig) 450 if (!gotsig)
254 { 451 {
452 int old_errno = errno;
255 gotsig = 1; 453 gotsig = 1;
256 write (sigpipe [1], &gotsig, 1); 454 write (sigpipe [1], &signum, 1);
455 errno = old_errno;
257 } 456 }
258} 457}
259 458
260static void 459static void
261sigcb (struct ev_io *iow, int revents) 460sigcb (EV_P_ struct ev_io *iow, int revents)
262{ 461{
263 struct ev_signal *w; 462 struct ev_watcher_list *w;
264 int sig; 463 int signum;
265 464
465 read (sigpipe [0], &revents, 1);
266 gotsig = 0; 466 gotsig = 0;
267 read (sigpipe [0], &revents, 1);
268 467
269 for (sig = signalmax; sig--; ) 468 for (signum = signalmax; signum--; )
270 if (signals [sig].gotsig) 469 if (signals [signum].gotsig)
271 { 470 {
272 signals [sig].gotsig = 0; 471 signals [signum].gotsig = 0;
273 472
274 for (w = signals [sig].head; w; w = w->next) 473 for (w = signals [signum].head; w; w = w->next)
275 event ((W)w, EV_SIGNAL); 474 event (EV_A_ (W)w, EV_SIGNAL);
276 } 475 }
277} 476}
278 477
279static void 478static void
280siginit (void) 479siginit (EV_P)
281{ 480{
481#ifndef WIN32
282 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 482 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); 483 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284 484
285 /* rather than sort out wether we really need nb, set it */ 485 /* rather than sort out wether we really need nb, set it */
286 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 486 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 487 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
488#endif
288 489
289 evio_set (&sigev, sigpipe [0], EV_READ); 490 ev_io_set (&sigev, sigpipe [0], EV_READ);
290 evio_start (&sigev); 491 ev_io_start (&sigev);
291} 492}
292 493
293/*****************************************************************************/ 494/*****************************************************************************/
294 495
295static struct ev_idle **idles; 496static struct ev_idle **idles;
296static int idlemax, idlecnt; 497static int idlemax, idlecnt;
297 498
499static struct ev_prepare **prepares;
500static int preparemax, preparecnt;
501
298static struct ev_check **checks; 502static struct ev_check **checks;
299static int checkmax, checkcnt; 503static int checkmax, checkcnt;
300 504
301/*****************************************************************************/ 505/*****************************************************************************/
302 506
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
303#if HAVE_EPOLL 553#if EV_USE_EPOLL
304# include "ev_epoll.c" 554# include "ev_epoll.c"
305#endif 555#endif
556#if EV_USEV_POLL
557# include "ev_poll.c"
558#endif
306#if HAVE_SELECT 559#if EV_USE_SELECT
307# include "ev_select.c" 560# include "ev_select.c"
308#endif 561#endif
309 562
310int ev_init (int flags) 563int
564ev_version_major (void)
311{ 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 {
312#if HAVE_MONOTONIC 598#if EV_USE_MONOTONIC
313 { 599 {
314 struct timespec ts; 600 struct timespec ts;
315 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 601 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316 have_monotonic = 1; 602 have_monotonic = 1;
317 } 603 }
318#endif 604#endif
319 605
320 ev_now = ev_time (); 606 rt_now = ev_time ();
321 now = get_clock (); 607 mn_now = get_clock ();
608 now_floor = mn_now;
322 diff = ev_now - now; 609 diff = rt_now - mn_now;
323 610
324 if (pipe (sigpipe)) 611 if (pipe (sigpipe))
325 return 0; 612 return 0;
326 613
327 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
328#if HAVE_EPOLL 624#if EV_USE_EPOLL
329 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 625 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
330#endif 626#endif
627#if EV_USEV_POLL
628 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
629#endif
331#if HAVE_SELECT 630#if EV_USE_SELECT
332 if (ev_method == EVMETHOD_NONE) select_init (flags); 631 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
333#endif 632#endif
334 633
335 if (ev_method) 634 if (method)
336 { 635 {
337 evw_init (&sigev, sigcb); 636 ev_watcher_init (&sigev, sigcb);
637 ev_set_priority (&sigev, EV_MAXPRI);
338 siginit (); 638 siginit (EV_A);
339 }
340 639
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
341 return ev_method; 648 return method;
342} 649}
343 650
344/*****************************************************************************/ 651/*****************************************************************************/
345 652
346void ev_prefork (void) 653void
654ev_fork_prepare (void)
347{ 655{
348 /* nop */ 656 /* nop */
349} 657}
350 658
659void
351void ev_postfork_parent (void) 660ev_fork_parent (void)
352{ 661{
353 /* nop */ 662 /* nop */
354} 663}
355 664
665void
356void ev_postfork_child (void) 666ev_fork_child (void)
357{ 667{
358#if HAVE_EPOLL 668#if EV_USE_EPOLL
359 if (ev_method == EVMETHOD_EPOLL) 669 if (method == EVMETHOD_EPOLL)
360 epoll_postfork_child (); 670 epoll_postfork_child ();
361#endif 671#endif
362 672
363 evio_stop (&sigev); 673 ev_io_stop (&sigev);
364 close (sigpipe [0]); 674 close (sigpipe [0]);
365 close (sigpipe [1]); 675 close (sigpipe [1]);
366 pipe (sigpipe); 676 pipe (sigpipe);
367 siginit (); 677 siginit ();
368} 678}
369 679
370/*****************************************************************************/ 680/*****************************************************************************/
371 681
372static void 682static void
373fd_reify (void) 683call_pending (EV_P)
374{ 684{
375 int i; 685 int pri;
376 686
377 for (i = 0; i < fdchangecnt; ++i) 687 for (pri = NUMPRI; pri--; )
378 { 688 while (pendingcnt [pri])
379 int fd = fdchanges [i];
380 ANFD *anfd = anfds + fd;
381 struct ev_io *w;
382
383 int wev = 0;
384
385 for (w = anfd->head; w; w = w->next)
386 wev |= w->events;
387
388 if (anfd->wev != wev)
389 { 689 {
390 method_modify (fd, anfd->wev, wev); 690 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391 anfd->wev = wev;
392 }
393 }
394 691
395 fdchangecnt = 0;
396}
397
398static void
399call_pending ()
400{
401 int i;
402
403 for (i = 0; i < pendingcnt; ++i)
404 {
405 ANPENDING *p = pendings + i;
406
407 if (p->w) 692 if (p->w)
408 { 693 {
409 p->w->pending = 0; 694 p->w->pending = 0;
410 p->w->cb (p->w, p->events); 695 p->w->cb (EV_A_ p->w, p->events);
411 } 696 }
412 } 697 }
413
414 pendingcnt = 0;
415} 698}
416 699
417static void 700static void
418timers_reify () 701timers_reify (EV_P)
419{ 702{
420 while (timercnt && timers [0]->at <= now) 703 while (timercnt && timers [0]->at <= mn_now)
421 { 704 {
422 struct ev_timer *w = timers [0]; 705 struct ev_timer *w = timers [0];
423 706
424 /* first reschedule or stop timer */ 707 /* first reschedule or stop timer */
425 if (w->repeat) 708 if (w->repeat)
426 { 709 {
710 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427 w->at = now + w->repeat; 711 w->at = mn_now + w->repeat;
428 assert (("timer timeout in the past, negative repeat?", w->at > now));
429 downheap ((WT *)timers, timercnt, 0); 712 downheap ((WT *)timers, timercnt, 0);
430 } 713 }
431 else 714 else
432 evtimer_stop (w); /* nonrepeating: stop timer */ 715 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433 716
434 event ((W)w, EV_TIMEOUT); 717 event ((W)w, EV_TIMEOUT);
435 } 718 }
436} 719}
437 720
438static void 721static void
439periodics_reify () 722periodics_reify (EV_P)
440{ 723{
441 while (periodiccnt && periodics [0]->at <= ev_now) 724 while (periodiccnt && periodics [0]->at <= rt_now)
442 { 725 {
443 struct ev_periodic *w = periodics [0]; 726 struct ev_periodic *w = periodics [0];
444 727
445 /* first reschedule or stop timer */ 728 /* first reschedule or stop timer */
446 if (w->interval) 729 if (w->interval)
447 { 730 {
448 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;
449 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));
450 downheap ((WT *)periodics, periodiccnt, 0); 733 downheap ((WT *)periodics, periodiccnt, 0);
451 } 734 }
452 else 735 else
453 evperiodic_stop (w); /* nonrepeating: stop timer */ 736 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454 737
455 event ((W)w, EV_TIMEOUT); 738 event (EV_A_ (W)w, EV_PERIODIC);
456 } 739 }
457} 740}
458 741
459static void 742static void
460time_jump (ev_tstamp diff) 743periodics_reschedule (EV_P_ ev_tstamp diff)
461{ 744{
462 int i; 745 int i;
463 746
464 /* adjust periodics */ 747 /* adjust periodics after time jump */
465 for (i = 0; i < periodiccnt; ++i) 748 for (i = 0; i < periodiccnt; ++i)
466 { 749 {
467 struct ev_periodic *w = periodics [i]; 750 struct ev_periodic *w = periodics [i];
468 751
469 if (w->interval) 752 if (w->interval)
470 { 753 {
471 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;
472 755
473 if (fabs (diff) >= 1e-4) 756 if (fabs (diff) >= 1e-4)
474 { 757 {
475 evperiodic_stop (w); 758 ev_periodic_stop (EV_A_ w);
476 evperiodic_start (w); 759 ev_periodic_start (EV_A_ w);
477 760
478 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 761 i = 0; /* restart loop, inefficient, but time jumps should be rare */
479 } 762 }
480 } 763 }
481 } 764 }
482
483 /* adjust timers. this is easy, as the offset is the same for all */
484 for (i = 0; i < timercnt; ++i)
485 timers [i]->at += diff;
486} 765}
487 766
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
488static void 785static void
489time_update () 786time_update (EV_P)
490{ 787{
491 int i; 788 int i;
492 789
493 ev_now = ev_time (); 790#if EV_USE_MONOTONIC
494
495 if (have_monotonic) 791 if (expect_true (have_monotonic))
496 { 792 {
497 ev_tstamp odiff = diff; 793 if (time_update_monotonic (EV_A))
498
499 for (i = 4; --i; ) /* loop a few times, before making important decisions */
500 { 794 {
501 now = get_clock (); 795 ev_tstamp odiff = diff;
796
797 for (i = 4; --i; ) /* loop a few times, before making important decisions */
798 {
502 diff = ev_now - now; 799 diff = rt_now - mn_now;
503 800
504 if (fabs (odiff - diff) < MIN_TIMEJUMP) 801 if (fabs (odiff - diff) < MIN_TIMEJUMP)
505 return; /* all is well */ 802 return; /* all is well */
506 803
507 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 */
508 } 811 }
509
510 time_jump (diff - odiff);
511 } 812 }
512 else 813 else
814#endif
513 { 815 {
514 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 816 rt_now = ev_time ();
515 time_jump (ev_now - now);
516 817
818 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
819 {
820 periodics_reschedule (EV_A_ rt_now - mn_now);
821
822 /* adjust timers. this is easy, as the offset is the same for all */
823 for (i = 0; i < timercnt; ++i)
824 timers [i]->at += diff;
825 }
826
517 now = ev_now; 827 mn_now = rt_now;
518 } 828 }
519} 829}
520 830
521int ev_loop_done; 831void
832ev_ref (EV_P)
833{
834 ++activecnt;
835}
522 836
837void
838ev_unref (EV_P)
839{
840 --activecnt;
841}
842
843static int loop_done;
844
845void
523void ev_loop (int flags) 846ev_loop (EV_P_ int flags)
524{ 847{
525 double block; 848 double block;
526 ev_loop_done = flags & EVLOOP_ONESHOT; 849 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
527
528 if (checkcnt)
529 {
530 queue_events ((W *)checks, checkcnt, EV_CHECK);
531 call_pending ();
532 }
533 850
534 do 851 do
535 { 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
536 /* update fd-related kernel structures */ 860 /* update fd-related kernel structures */
537 fd_reify (); 861 fd_reify (EV_A);
538 862
539 /* calculate blocking time */ 863 /* calculate blocking time */
540 864
541 /* 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 {
542 ev_now = ev_time (); 873 rt_now = ev_time ();
874 mn_now = rt_now;
875 }
543 876
544 if (flags & EVLOOP_NONBLOCK || idlecnt) 877 if (flags & EVLOOP_NONBLOCK || idlecnt)
545 block = 0.; 878 block = 0.;
546 else 879 else
547 { 880 {
548 block = MAX_BLOCKTIME; 881 block = MAX_BLOCKTIME;
549 882
550 if (timercnt) 883 if (timercnt)
551 { 884 {
552 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 885 ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553 if (block > to) block = to; 886 if (block > to) block = to;
554 } 887 }
555 888
556 if (periodiccnt) 889 if (periodiccnt)
557 { 890 {
558 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 891 ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559 if (block > to) block = to; 892 if (block > to) block = to;
560 } 893 }
561 894
562 if (block < 0.) block = 0.; 895 if (block < 0.) block = 0.;
563 } 896 }
564 897
565 method_poll (block); 898 method_poll (EV_A_ block);
566 899
567 /* update ev_now, do magic */ 900 /* update rt_now, do magic */
568 time_update (); 901 time_update (EV_A);
569 902
570 /* queue pending timers and reschedule them */ 903 /* queue pending timers and reschedule them */
904 timers_reify (EV_A); /* relative timers called last */
571 periodics_reify (); /* absolute timers first */ 905 periodics_reify (EV_A); /* absolute timers called first */
572 timers_reify (); /* relative timers second */
573 906
574 /* queue idle watchers unless io or timers are pending */ 907 /* queue idle watchers unless io or timers are pending */
575 if (!pendingcnt) 908 if (!pendingcnt)
576 queue_events ((W *)idles, idlecnt, EV_IDLE); 909 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577 910
578 /* queue check and possibly idle watchers */ 911 /* queue check watchers, to be executed first */
912 if (checkcnt)
579 queue_events ((W *)checks, checkcnt, EV_CHECK); 913 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580 914
581 call_pending (); 915 call_pending (EV_A);
916 printf ("activecnt %d\n", activecnt);//D
582 } 917 }
583 while (!ev_loop_done); 918 while (activecnt && !loop_done);
919
920 if (loop_done != 2)
921 loop_done = 0;
922}
923
924void
925ev_unloop (EV_P_ int how)
926{
927 loop_done = how;
584} 928}
585 929
586/*****************************************************************************/ 930/*****************************************************************************/
587 931
588static void 932inline void
589wlist_add (WL *head, WL elem) 933wlist_add (WL *head, WL elem)
590{ 934{
591 elem->next = *head; 935 elem->next = *head;
592 *head = elem; 936 *head = elem;
593} 937}
594 938
595static void 939inline void
596wlist_del (WL *head, WL elem) 940wlist_del (WL *head, WL elem)
597{ 941{
598 while (*head) 942 while (*head)
599 { 943 {
600 if (*head == elem) 944 if (*head == elem)
… …
605 949
606 head = &(*head)->next; 950 head = &(*head)->next;
607 } 951 }
608} 952}
609 953
610static 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
611ev_start (W w, int active) 965ev_start (EV_P_ W w, int active)
612{ 966{
613 w->pending = 0; 967 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
968 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
969
614 w->active = active; 970 w->active = active;
971 ev_ref (EV_A);
615} 972}
616 973
617static void 974inline void
618ev_stop (W w) 975ev_stop (EV_P_ W w)
619{ 976{
620 if (w->pending) 977 ev_unref (EV_A);
621 pendings [w->pending - 1].w = 0;
622
623 w->active = 0; 978 w->active = 0;
624} 979}
625 980
626/*****************************************************************************/ 981/*****************************************************************************/
627 982
628void 983void
629evio_start (struct ev_io *w) 984ev_io_start (EV_P_ struct ev_io *w)
630{ 985{
986 int fd = w->fd;
987
631 if (ev_is_active (w)) 988 if (ev_is_active (w))
632 return; 989 return;
633 990
634 int fd = w->fd; 991 assert (("ev_io_start called with negative fd", fd >= 0));
635 992
636 ev_start ((W)w, 1); 993 ev_start (EV_A_ (W)w, 1);
637 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 994 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638 wlist_add ((WL *)&anfds[fd].head, (WL)w); 995 wlist_add ((WL *)&anfds[fd].head, (WL)w);
639 996
640 ++fdchangecnt; 997 fd_change (EV_A_ fd);
641 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642 fdchanges [fdchangecnt - 1] = fd;
643} 998}
644 999
645void 1000void
646evio_stop (struct ev_io *w) 1001ev_io_stop (EV_P_ struct ev_io *w)
647{ 1002{
1003 ev_clear_pending (EV_A_ (W)w);
648 if (!ev_is_active (w)) 1004 if (!ev_is_active (w))
649 return; 1005 return;
650 1006
651 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1007 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652 ev_stop ((W)w); 1008 ev_stop (EV_A_ (W)w);
653 1009
654 ++fdchangecnt; 1010 fd_change (EV_A_ w->fd);
655 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656 fdchanges [fdchangecnt - 1] = w->fd;
657} 1011}
658 1012
659
660void 1013void
661evtimer_start (struct ev_timer *w) 1014ev_timer_start (EV_P_ struct ev_timer *w)
662{ 1015{
663 if (ev_is_active (w)) 1016 if (ev_is_active (w))
664 return; 1017 return;
665 1018
666 w->at += now; 1019 w->at += mn_now;
667 1020
1021 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1022
668 ev_start ((W)w, ++timercnt); 1023 ev_start (EV_A_ (W)w, ++timercnt);
669 array_needsize (timers, timermax, timercnt, ); 1024 array_needsize (timers, timermax, timercnt, );
670 timers [timercnt - 1] = w; 1025 timers [timercnt - 1] = w;
671 upheap ((WT *)timers, timercnt - 1); 1026 upheap ((WT *)timers, timercnt - 1);
672} 1027}
673 1028
674void 1029void
675evtimer_stop (struct ev_timer *w) 1030ev_timer_stop (EV_P_ struct ev_timer *w)
676{ 1031{
1032 ev_clear_pending (EV_A_ (W)w);
677 if (!ev_is_active (w)) 1033 if (!ev_is_active (w))
678 return; 1034 return;
679 1035
680 if (w->active < timercnt--) 1036 if (w->active < timercnt--)
681 { 1037 {
682 timers [w->active - 1] = timers [timercnt]; 1038 timers [w->active - 1] = timers [timercnt];
683 downheap ((WT *)timers, timercnt, w->active - 1); 1039 downheap ((WT *)timers, timercnt, w->active - 1);
684 } 1040 }
685 1041
1042 w->at = w->repeat;
1043
686 ev_stop ((W)w); 1044 ev_stop (EV_A_ (W)w);
687} 1045}
688 1046
689void 1047void
690evperiodic_start (struct ev_periodic *w) 1048ev_timer_again (EV_P_ struct ev_timer *w)
691{ 1049{
692 if (ev_is_active (w)) 1050 if (ev_is_active (w))
1051 {
1052 if (w->repeat)
1053 {
1054 w->at = mn_now + w->repeat;
1055 downheap ((WT *)timers, timercnt, w->active - 1);
1056 }
1057 else
1058 ev_timer_stop (EV_A_ w);
1059 }
1060 else if (w->repeat)
1061 ev_timer_start (EV_A_ w);
1062}
1063
1064void
1065ev_periodic_start (EV_P_ struct ev_periodic *w)
1066{
1067 if (ev_is_active (w))
693 return; 1068 return;
1069
1070 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694 1071
695 /* 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 */
696 if (w->interval) 1073 if (w->interval)
697 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1074 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698 1075
699 ev_start ((W)w, ++periodiccnt); 1076 ev_start (EV_A_ (W)w, ++periodiccnt);
700 array_needsize (periodics, periodicmax, periodiccnt, ); 1077 array_needsize (periodics, periodicmax, periodiccnt, );
701 periodics [periodiccnt - 1] = w; 1078 periodics [periodiccnt - 1] = w;
702 upheap ((WT *)periodics, periodiccnt - 1); 1079 upheap ((WT *)periodics, periodiccnt - 1);
703} 1080}
704 1081
705void 1082void
706evperiodic_stop (struct ev_periodic *w) 1083ev_periodic_stop (EV_P_ struct ev_periodic *w)
707{ 1084{
1085 ev_clear_pending (EV_A_ (W)w);
708 if (!ev_is_active (w)) 1086 if (!ev_is_active (w))
709 return; 1087 return;
710 1088
711 if (w->active < periodiccnt--) 1089 if (w->active < periodiccnt--)
712 { 1090 {
713 periodics [w->active - 1] = periodics [periodiccnt]; 1091 periodics [w->active - 1] = periodics [periodiccnt];
714 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1092 downheap ((WT *)periodics, periodiccnt, w->active - 1);
715 } 1093 }
716 1094
717 ev_stop ((W)w); 1095 ev_stop (EV_A_ (W)w);
718} 1096}
719 1097
1098#ifndef SA_RESTART
1099# define SA_RESTART 0
1100#endif
1101
720void 1102void
721evsignal_start (struct ev_signal *w) 1103ev_signal_start (EV_P_ struct ev_signal *w)
722{ 1104{
723 if (ev_is_active (w)) 1105 if (ev_is_active (w))
724 return; 1106 return;
725 1107
1108 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1109
726 ev_start ((W)w, 1); 1110 ev_start (EV_A_ (W)w, 1);
727 array_needsize (signals, signalmax, w->signum, signals_init); 1111 array_needsize (signals, signalmax, w->signum, signals_init);
728 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1112 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729 1113
730 if (!w->next) 1114 if (!w->next)
731 { 1115 {
732 struct sigaction sa; 1116 struct sigaction sa;
733 sa.sa_handler = sighandler; 1117 sa.sa_handler = sighandler;
734 sigfillset (&sa.sa_mask); 1118 sigfillset (&sa.sa_mask);
735 sa.sa_flags = 0; 1119 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736 sigaction (w->signum, &sa, 0); 1120 sigaction (w->signum, &sa, 0);
737 } 1121 }
738} 1122}
739 1123
740void 1124void
741evsignal_stop (struct ev_signal *w) 1125ev_signal_stop (EV_P_ struct ev_signal *w)
742{ 1126{
1127 ev_clear_pending (EV_A_ (W)w);
743 if (!ev_is_active (w)) 1128 if (!ev_is_active (w))
744 return; 1129 return;
745 1130
746 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1131 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747 ev_stop ((W)w); 1132 ev_stop (EV_A_ (W)w);
748 1133
749 if (!signals [w->signum - 1].head) 1134 if (!signals [w->signum - 1].head)
750 signal (w->signum, SIG_DFL); 1135 signal (w->signum, SIG_DFL);
751} 1136}
752 1137
1138void
753void evidle_start (struct ev_idle *w) 1139ev_idle_start (EV_P_ struct ev_idle *w)
754{ 1140{
755 if (ev_is_active (w)) 1141 if (ev_is_active (w))
756 return; 1142 return;
757 1143
758 ev_start ((W)w, ++idlecnt); 1144 ev_start (EV_A_ (W)w, ++idlecnt);
759 array_needsize (idles, idlemax, idlecnt, ); 1145 array_needsize (idles, idlemax, idlecnt, );
760 idles [idlecnt - 1] = w; 1146 idles [idlecnt - 1] = w;
761} 1147}
762 1148
1149void
763void evidle_stop (struct ev_idle *w) 1150ev_idle_stop (EV_P_ struct ev_idle *w)
764{ 1151{
1152 ev_clear_pending (EV_A_ (W)w);
1153 if (ev_is_active (w))
1154 return;
1155
765 idles [w->active - 1] = idles [--idlecnt]; 1156 idles [w->active - 1] = idles [--idlecnt];
766 ev_stop ((W)w); 1157 ev_stop (EV_A_ (W)w);
767} 1158}
768 1159
769void evcheck_start (struct ev_check *w) 1160void
1161ev_prepare_start (EV_P_ struct ev_prepare *w)
770{ 1162{
771 if (ev_is_active (w)) 1163 if (ev_is_active (w))
772 return; 1164 return;
773 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
774 ev_start ((W)w, ++checkcnt); 1188 ev_start (EV_A_ (W)w, ++checkcnt);
775 array_needsize (checks, checkmax, checkcnt, ); 1189 array_needsize (checks, checkmax, checkcnt, );
776 checks [checkcnt - 1] = w; 1190 checks [checkcnt - 1] = w;
777} 1191}
778 1192
1193void
779void evcheck_stop (struct ev_check *w) 1194ev_check_stop (EV_P_ struct ev_check *w)
780{ 1195{
1196 ev_clear_pending (EV_A_ (W)w);
1197 if (ev_is_active (w))
1198 return;
1199
781 checks [w->active - 1] = checks [--checkcnt]; 1200 checks [w->active - 1] = checks [--checkcnt];
782 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);
783} 1223}
784 1224
785/*****************************************************************************/ 1225/*****************************************************************************/
786 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
787#if 1 1290#if 0
788 1291
789struct ev_io wio; 1292struct ev_io wio;
790 1293
791static void 1294static void
792sin_cb (struct ev_io *w, int revents) 1295sin_cb (struct ev_io *w, int revents)
… …
796 1299
797static void 1300static void
798ocb (struct ev_timer *w, int revents) 1301ocb (struct ev_timer *w, int revents)
799{ 1302{
800 //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);
801 evtimer_stop (w); 1304 ev_timer_stop (w);
802 evtimer_start (w); 1305 ev_timer_start (w);
803} 1306}
804 1307
805static void 1308static void
806scb (struct ev_signal *w, int revents) 1309scb (struct ev_signal *w, int revents)
807{ 1310{
808 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 1311 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809 evio_stop (&wio); 1312 ev_io_stop (&wio);
810 evio_start (&wio); 1313 ev_io_start (&wio);
811} 1314}
812 1315
813static void 1316static void
814gcb (struct ev_signal *w, int revents) 1317gcb (struct ev_signal *w, int revents)
815{ 1318{
… …
819 1322
820int main (void) 1323int main (void)
821{ 1324{
822 ev_init (0); 1325 ev_init (0);
823 1326
824 evio_init (&wio, sin_cb, 0, EV_READ); 1327 ev_io_init (&wio, sin_cb, 0, EV_READ);
825 evio_start (&wio); 1328 ev_io_start (&wio);
826 1329
827 struct ev_timer t[10000]; 1330 struct ev_timer t[10000];
828 1331
829#if 0 1332#if 0
830 int i; 1333 int i;
831 for (i = 0; i < 10000; ++i) 1334 for (i = 0; i < 10000; ++i)
832 { 1335 {
833 struct ev_timer *w = t + i; 1336 struct ev_timer *w = t + i;
834 evw_init (w, ocb, i); 1337 ev_watcher_init (w, ocb, i);
835 evtimer_init_abs (w, ocb, drand48 (), 0.99775533); 1338 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
836 evtimer_start (w); 1339 ev_timer_start (w);
837 if (drand48 () < 0.5) 1340 if (drand48 () < 0.5)
838 evtimer_stop (w); 1341 ev_timer_stop (w);
839 } 1342 }
840#endif 1343#endif
841 1344
842 struct ev_timer t1; 1345 struct ev_timer t1;
843 evtimer_init (&t1, ocb, 5, 10); 1346 ev_timer_init (&t1, ocb, 5, 10);
844 evtimer_start (&t1); 1347 ev_timer_start (&t1);
845 1348
846 struct ev_signal sig; 1349 struct ev_signal sig;
847 evsignal_init (&sig, scb, SIGQUIT); 1350 ev_signal_init (&sig, scb, SIGQUIT);
848 evsignal_start (&sig); 1351 ev_signal_start (&sig);
849 1352
850 struct ev_check cw; 1353 struct ev_check cw;
851 evcheck_init (&cw, gcb); 1354 ev_check_init (&cw, gcb);
852 evcheck_start (&cw); 1355 ev_check_start (&cw);
853 1356
854 struct ev_idle iw; 1357 struct ev_idle iw;
855 evidle_init (&iw, gcb); 1358 ev_idle_init (&iw, gcb);
856 evidle_start (&iw); 1359 ev_idle_start (&iw);
857 1360
858 ev_loop (0); 1361 ev_loop (0);
859 1362
860 return 0; 1363 return 0;
861} 1364}

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