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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 1.79 by root, Fri Nov 9 15:15:20 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
34# if HAVE_CLOCK_GETTIME
35# define EV_USE_MONOTONIC 1
36# define EV_USE_REALTIME 1
37# endif
38
39# if HAVE_SELECT && HAVE_SYS_SELECT_H
40# define EV_USE_SELECT 1
41# endif
42
43# if HAVE_POLL && HAVE_POLL_H
44# define EV_USE_POLL 1
45# endif
46
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48# define EV_USE_EPOLL 1
49# endif
50
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
52# define EV_USE_KQUEUE 1
53# endif
54
55#endif
56
1#include <math.h> 57#include <math.h>
2#include <stdlib.h> 58#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 59#include <fcntl.h>
5#include <signal.h> 60#include <stddef.h>
6 61
7#include <stdio.h> 62#include <stdio.h>
8 63
9#include <assert.h> 64#include <assert.h>
10#include <errno.h> 65#include <errno.h>
11#include <sys/time.h> 66#include <sys/types.h>
12#include <time.h> 67#include <time.h>
13 68
14#define HAVE_EPOLL 1 69#include <signal.h>
15 70
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
16#ifndef HAVE_MONOTONIC 78#ifndef EV_USE_MONOTONIC
17# ifdef CLOCK_MONOTONIC
18# define HAVE_MONOTONIC 1 79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
19# endif 105# endif
20#endif 106#endif
21 107
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 108#ifndef EV_USE_REALTIME
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 109# define EV_USE_REALTIME 1
32#endif 110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
33 125
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
36 130
37#include "ev.h" 131#include "ev.h"
38 132
39struct ev_watcher { 133#if __GNUC__ >= 3
40 EV_WATCHER (ev_watcher); 134# define expect(expr,value) __builtin_expect ((expr),(value))
41}; 135# define inline inline
136#else
137# define expect(expr,value) (expr)
138# define inline static
139#endif
42 140
43struct ev_watcher_list { 141#define expect_false(expr) expect ((expr) != 0, 0)
44 EV_WATCHER_LIST (ev_watcher_list); 142#define expect_true(expr) expect ((expr) != 0, 1)
45};
46 143
47struct ev_watcher_time { 144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48 EV_WATCHER_TIME (ev_watcher_time); 145#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49};
50 146
51typedef struct ev_watcher *W; 147typedef struct ev_watcher *W;
52typedef struct ev_watcher_list *WL; 148typedef struct ev_watcher_list *WL;
53typedef struct ev_watcher_time *WT; 149typedef struct ev_watcher_time *WT;
54 150
55static ev_tstamp now, diff; /* monotonic clock */ 151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56ev_tstamp ev_now;
57int ev_method;
58 152
59static int have_monotonic; /* runtime */ 153#include "ev_win32.c"
60
61static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
62static void (*method_modify)(int fd, int oev, int nev);
63static void (*method_poll)(ev_tstamp timeout);
64 154
65/*****************************************************************************/ 155/*****************************************************************************/
66 156
67ev_tstamp 157static void (*syserr_cb)(const char *msg);
158
159void ev_set_syserr_cb (void (*cb)(const char *msg))
160{
161 syserr_cb = cb;
162}
163
164static void
165syserr (const char *msg)
166{
167 if (!msg)
168 msg = "(libev) system error";
169
170 if (syserr_cb)
171 syserr_cb (msg);
172 else
173 {
174 perror (msg);
175 abort ();
176 }
177}
178
179static void *(*alloc)(void *ptr, long size);
180
181void ev_set_allocator (void *(*cb)(void *ptr, long size))
182{
183 alloc = cb;
184}
185
186static void *
187ev_realloc (void *ptr, long size)
188{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
190
191 if (!ptr && size)
192 {
193 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
194 abort ();
195 }
196
197 return ptr;
198}
199
200#define ev_malloc(size) ev_realloc (0, (size))
201#define ev_free(ptr) ev_realloc ((ptr), 0)
202
203/*****************************************************************************/
204
205typedef struct
206{
207 WL head;
208 unsigned char events;
209 unsigned char reify;
210} ANFD;
211
212typedef struct
213{
214 W w;
215 int events;
216} ANPENDING;
217
218#if EV_MULTIPLICITY
219
220struct ev_loop
221{
222# define VAR(name,decl) decl;
223# include "ev_vars.h"
224};
225# undef VAR
226# include "ev_wrap.h"
227
228#else
229
230# define VAR(name,decl) static decl;
231# include "ev_vars.h"
232# undef VAR
233
234#endif
235
236/*****************************************************************************/
237
238inline ev_tstamp
68ev_time (void) 239ev_time (void)
69{ 240{
70#if HAVE_REALTIME 241#if EV_USE_REALTIME
71 struct timespec ts; 242 struct timespec ts;
72 clock_gettime (CLOCK_REALTIME, &ts); 243 clock_gettime (CLOCK_REALTIME, &ts);
73 return ts.tv_sec + ts.tv_nsec * 1e-9; 244 return ts.tv_sec + ts.tv_nsec * 1e-9;
74#else 245#else
75 struct timeval tv; 246 struct timeval tv;
76 gettimeofday (&tv, 0); 247 gettimeofday (&tv, 0);
77 return tv.tv_sec + tv.tv_usec * 1e-6; 248 return tv.tv_sec + tv.tv_usec * 1e-6;
78#endif 249#endif
79} 250}
80 251
81static ev_tstamp 252inline ev_tstamp
82get_clock (void) 253get_clock (void)
83{ 254{
84#if HAVE_MONOTONIC 255#if EV_USE_MONOTONIC
85 if (have_monotonic) 256 if (expect_true (have_monotonic))
86 { 257 {
87 struct timespec ts; 258 struct timespec ts;
88 clock_gettime (CLOCK_MONOTONIC, &ts); 259 clock_gettime (CLOCK_MONOTONIC, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 260 return ts.tv_sec + ts.tv_nsec * 1e-9;
90 } 261 }
91#endif 262#endif
92 263
93 return ev_time (); 264 return ev_time ();
94} 265}
95 266
267ev_tstamp
268ev_now (EV_P)
269{
270 return rt_now;
271}
272
273#define array_roundsize(type,n) ((n) | 4 & ~3)
274
96#define array_needsize(base,cur,cnt,init) \ 275#define array_needsize(type,base,cur,cnt,init) \
97 if ((cnt) > cur) \ 276 if (expect_false ((cnt) > cur)) \
98 { \ 277 { \
99 int newcnt = cur ? cur << 1 : 16; \ 278 int newcnt = cur; \
100 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 279 do \
280 { \
281 newcnt = array_roundsize (type, newcnt << 1); \
282 } \
283 while ((cnt) > newcnt); \
284 \
101 base = realloc (base, sizeof (*base) * (newcnt)); \ 285 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
102 init (base + cur, newcnt - cur); \ 286 init (base + cur, newcnt - cur); \
103 cur = newcnt; \ 287 cur = newcnt; \
104 } 288 }
289
290#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 }
297
298/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
299/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
300#define array_free_microshit(stem) \
301 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
302
303#define array_free(stem, idx) \
304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
105 305
106/*****************************************************************************/ 306/*****************************************************************************/
107 307
108typedef struct
109{
110 struct ev_io *head;
111 unsigned char wev, rev; /* want, received event set */
112} ANFD;
113
114static ANFD *anfds;
115static int anfdmax;
116
117static int *fdchanges;
118static int fdchangemax, fdchangecnt;
119
120static void 308static void
121anfds_init (ANFD *base, int count) 309anfds_init (ANFD *base, int count)
122{ 310{
123 while (count--) 311 while (count--)
124 { 312 {
125 base->head = 0; 313 base->head = 0;
126 base->wev = base->rev = EV_NONE; 314 base->events = EV_NONE;
315 base->reify = 0;
316
127 ++base; 317 ++base;
128 } 318 }
129} 319}
130 320
131typedef struct 321void
322ev_feed_event (EV_P_ void *w, int revents)
132{ 323{
133 W w; 324 W w_ = (W)w;
134 int events;
135} ANPENDING;
136 325
137static ANPENDING *pendings; 326 if (w_->pending)
138static int pendingmax, pendingcnt; 327 {
328 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
329 return;
330 }
139 331
140static void
141event (W w, int events)
142{
143 w->pending = ++pendingcnt; 332 w_->pending = ++pendingcnt [ABSPRI (w_)];
144 array_needsize (pendings, pendingmax, pendingcnt, ); 333 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
145 pendings [pendingcnt - 1].w = w; 334 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
146 pendings [pendingcnt - 1].events = events; 335 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
147} 336}
148 337
149static void 338static void
339queue_events (EV_P_ W *events, int eventcnt, int type)
340{
341 int i;
342
343 for (i = 0; i < eventcnt; ++i)
344 ev_feed_event (EV_A_ events [i], type);
345}
346
347inline void
150fd_event (int fd, int events) 348fd_event (EV_P_ int fd, int revents)
151{ 349{
152 ANFD *anfd = anfds + fd; 350 ANFD *anfd = anfds + fd;
153 struct ev_io *w; 351 struct ev_io *w;
154 352
155 for (w = anfd->head; w; w = w->next) 353 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
156 { 354 {
157 int ev = w->events & events; 355 int ev = w->events & revents;
158 356
159 if (ev) 357 if (ev)
160 event ((W)w, ev); 358 ev_feed_event (EV_A_ (W)w, ev);
161 } 359 }
162} 360}
163 361
362void
363ev_feed_fd_event (EV_P_ int fd, int revents)
364{
365 fd_event (EV_A_ fd, revents);
366}
367
368/*****************************************************************************/
369
164static void 370static void
165queue_events (W *events, int eventcnt, int type) 371fd_reify (EV_P)
166{ 372{
167 int i; 373 int i;
168 374
169 for (i = 0; i < eventcnt; ++i) 375 for (i = 0; i < fdchangecnt; ++i)
170 event (events [i], type); 376 {
377 int fd = fdchanges [i];
378 ANFD *anfd = anfds + fd;
379 struct ev_io *w;
380
381 int events = 0;
382
383 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
384 events |= w->events;
385
386 anfd->reify = 0;
387
388 method_modify (EV_A_ fd, anfd->events, events);
389 anfd->events = events;
390 }
391
392 fdchangecnt = 0;
393}
394
395static void
396fd_change (EV_P_ int fd)
397{
398 if (anfds [fd].reify)
399 return;
400
401 anfds [fd].reify = 1;
402
403 ++fdchangecnt;
404 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
405 fdchanges [fdchangecnt - 1] = fd;
406}
407
408static void
409fd_kill (EV_P_ int fd)
410{
411 struct ev_io *w;
412
413 while ((w = (struct ev_io *)anfds [fd].head))
414 {
415 ev_io_stop (EV_A_ w);
416 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
417 }
418}
419
420static int
421fd_valid (int fd)
422{
423#ifdef WIN32
424 return !!win32_get_osfhandle (fd);
425#else
426 return fcntl (fd, F_GETFD) != -1;
427#endif
428}
429
430/* called on EBADF to verify fds */
431static void
432fd_ebadf (EV_P)
433{
434 int fd;
435
436 for (fd = 0; fd < anfdmax; ++fd)
437 if (anfds [fd].events)
438 if (!fd_valid (fd) == -1 && errno == EBADF)
439 fd_kill (EV_A_ fd);
440}
441
442/* called on ENOMEM in select/poll to kill some fds and retry */
443static void
444fd_enomem (EV_P)
445{
446 int fd;
447
448 for (fd = anfdmax; fd--; )
449 if (anfds [fd].events)
450 {
451 fd_kill (EV_A_ fd);
452 return;
453 }
454}
455
456/* usually called after fork if method needs to re-arm all fds from scratch */
457static void
458fd_rearm_all (EV_P)
459{
460 int fd;
461
462 /* this should be highly optimised to not do anything but set a flag */
463 for (fd = 0; fd < anfdmax; ++fd)
464 if (anfds [fd].events)
465 {
466 anfds [fd].events = 0;
467 fd_change (EV_A_ fd);
468 }
171} 469}
172 470
173/*****************************************************************************/ 471/*****************************************************************************/
174 472
175static struct ev_timer **timers;
176static int timermax, timercnt;
177
178static struct ev_periodic **periodics;
179static int periodicmax, periodiccnt;
180
181static void 473static void
182upheap (WT *timers, int k) 474upheap (WT *heap, int k)
183{ 475{
184 WT w = timers [k]; 476 WT w = heap [k];
185 477
186 while (k && timers [k >> 1]->at > w->at) 478 while (k && heap [k >> 1]->at > w->at)
187 { 479 {
188 timers [k] = timers [k >> 1]; 480 heap [k] = heap [k >> 1];
189 timers [k]->active = k + 1; 481 ((W)heap [k])->active = k + 1;
190 k >>= 1; 482 k >>= 1;
191 } 483 }
192 484
193 timers [k] = w; 485 heap [k] = w;
194 timers [k]->active = k + 1; 486 ((W)heap [k])->active = k + 1;
195 487
196} 488}
197 489
198static void 490static void
199downheap (WT *timers, int N, int k) 491downheap (WT *heap, int N, int k)
200{ 492{
201 WT w = timers [k]; 493 WT w = heap [k];
202 494
203 while (k < (N >> 1)) 495 while (k < (N >> 1))
204 { 496 {
205 int j = k << 1; 497 int j = k << 1;
206 498
207 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 499 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208 ++j; 500 ++j;
209 501
210 if (w->at <= timers [j]->at) 502 if (w->at <= heap [j]->at)
211 break; 503 break;
212 504
213 timers [k] = timers [j]; 505 heap [k] = heap [j];
214 timers [k]->active = k + 1; 506 ((W)heap [k])->active = k + 1;
215 k = j; 507 k = j;
216 } 508 }
217 509
218 timers [k] = w; 510 heap [k] = w;
219 timers [k]->active = k + 1; 511 ((W)heap [k])->active = k + 1;
220} 512}
221 513
222/*****************************************************************************/ 514/*****************************************************************************/
223 515
224typedef struct 516typedef struct
225{ 517{
226 struct ev_signal *head; 518 WL head;
227 sig_atomic_t gotsig; 519 sig_atomic_t volatile gotsig;
228} ANSIG; 520} ANSIG;
229 521
230static ANSIG *signals; 522static ANSIG *signals;
231static int signalmax; 523static int signalmax;
232 524
233static int sigpipe [2]; 525static int sigpipe [2];
234static sig_atomic_t gotsig; 526static sig_atomic_t volatile gotsig;
235static struct ev_io sigev; 527static struct ev_io sigev;
236 528
237static void 529static void
238signals_init (ANSIG *base, int count) 530signals_init (ANSIG *base, int count)
239{ 531{
240 while (count--) 532 while (count--)
241 { 533 {
242 base->head = 0; 534 base->head = 0;
243 base->gotsig = 0; 535 base->gotsig = 0;
536
244 ++base; 537 ++base;
245 } 538 }
246} 539}
247 540
248static void 541static void
249sighandler (int signum) 542sighandler (int signum)
250{ 543{
544#if WIN32
545 signal (signum, sighandler);
546#endif
547
251 signals [signum - 1].gotsig = 1; 548 signals [signum - 1].gotsig = 1;
252 549
253 if (!gotsig) 550 if (!gotsig)
254 { 551 {
552 int old_errno = errno;
255 gotsig = 1; 553 gotsig = 1;
554#ifdef WIN32
555 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
556#else
256 write (sigpipe [1], &gotsig, 1); 557 write (sigpipe [1], &signum, 1);
558#endif
559 errno = old_errno;
257 } 560 }
258} 561}
259 562
563void
564ev_feed_signal_event (EV_P_ int signum)
565{
566#if EV_MULTIPLICITY
567 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
568#endif
569
570 --signum;
571
572 if (signum < 0 || signum >= signalmax)
573 return;
574
575 signals [signum].gotsig = 0;
576
577 for (w = signals [signum].head; w; w = w->next)
578 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
579}
580
260static void 581static void
261sigcb (struct ev_io *iow, int revents) 582sigcb (EV_P_ struct ev_io *iow, int revents)
262{ 583{
263 struct ev_signal *w; 584 WL w;
264 int sig; 585 int signum;
265 586
587#ifdef WIN32
588 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
589#else
590 read (sigpipe [0], &revents, 1);
591#endif
266 gotsig = 0; 592 gotsig = 0;
267 read (sigpipe [0], &revents, 1);
268 593
269 for (sig = signalmax; sig--; ) 594 for (signum = signalmax; signum--; )
270 if (signals [sig].gotsig) 595 if (signals [signum].gotsig)
271 { 596 sigevent (EV_A_ signum + 1);
272 signals [sig].gotsig = 0;
273
274 for (w = signals [sig].head; w; w = w->next)
275 event ((W)w, EV_SIGNAL);
276 }
277} 597}
278 598
279static void 599static void
280siginit (void) 600siginit (EV_P)
281{ 601{
602#ifndef WIN32
282 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 603 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); 604 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284 605
285 /* rather than sort out wether we really need nb, set it */ 606 /* rather than sort out wether we really need nb, set it */
286 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 607 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 608 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
609#endif
288 610
289 evio_set (&sigev, sigpipe [0], EV_READ); 611 ev_io_set (&sigev, sigpipe [0], EV_READ);
290 evio_start (&sigev); 612 ev_io_start (EV_A_ &sigev);
613 ev_unref (EV_A); /* child watcher should not keep loop alive */
291} 614}
292 615
293/*****************************************************************************/ 616/*****************************************************************************/
294 617
295static struct ev_idle **idles; 618static struct ev_child *childs [PID_HASHSIZE];
296static int idlemax, idlecnt;
297 619
298static struct ev_check **checks; 620#ifndef WIN32
299static int checkmax, checkcnt; 621
622static struct ev_signal childev;
623
624#ifndef WCONTINUED
625# define WCONTINUED 0
626#endif
627
628static void
629child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
630{
631 struct ev_child *w;
632
633 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
634 if (w->pid == pid || !w->pid)
635 {
636 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
637 w->rpid = pid;
638 w->rstatus = status;
639 ev_feed_event (EV_A_ (W)w, EV_CHILD);
640 }
641}
642
643static void
644childcb (EV_P_ struct ev_signal *sw, int revents)
645{
646 int pid, status;
647
648 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
649 {
650 /* make sure we are called again until all childs have been reaped */
651 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
652
653 child_reap (EV_A_ sw, pid, pid, status);
654 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
655 }
656}
657
658#endif
300 659
301/*****************************************************************************/ 660/*****************************************************************************/
302 661
662#if EV_USE_KQUEUE
663# include "ev_kqueue.c"
664#endif
303#if HAVE_EPOLL 665#if EV_USE_EPOLL
304# include "ev_epoll.c" 666# include "ev_epoll.c"
305#endif 667#endif
668#if EV_USE_POLL
669# include "ev_poll.c"
670#endif
306#if HAVE_SELECT 671#if EV_USE_SELECT
307# include "ev_select.c" 672# include "ev_select.c"
308#endif 673#endif
309 674
310int ev_init (int flags) 675int
676ev_version_major (void)
311{ 677{
678 return EV_VERSION_MAJOR;
679}
680
681int
682ev_version_minor (void)
683{
684 return EV_VERSION_MINOR;
685}
686
687/* return true if we are running with elevated privileges and should ignore env variables */
688static int
689enable_secure (void)
690{
691#ifdef WIN32
692 return 0;
693#else
694 return getuid () != geteuid ()
695 || getgid () != getegid ();
696#endif
697}
698
699int
700ev_method (EV_P)
701{
702 return method;
703}
704
705static void
706loop_init (EV_P_ int methods)
707{
708 if (!method)
709 {
312#if HAVE_MONOTONIC 710#if EV_USE_MONOTONIC
313 { 711 {
314 struct timespec ts; 712 struct timespec ts;
315 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 713 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316 have_monotonic = 1; 714 have_monotonic = 1;
317 } 715 }
318#endif 716#endif
319 717
320 ev_now = ev_time (); 718 rt_now = ev_time ();
321 now = get_clock (); 719 mn_now = get_clock ();
322 diff = ev_now - now; 720 now_floor = mn_now;
721 rtmn_diff = rt_now - mn_now;
323 722
723 if (methods == EVMETHOD_AUTO)
724 if (!enable_secure () && getenv ("LIBEV_METHODS"))
725 methods = atoi (getenv ("LIBEV_METHODS"));
726 else
727 methods = EVMETHOD_ANY;
728
729 method = 0;
730#if EV_USE_WIN32
731 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
732#endif
733#if EV_USE_KQUEUE
734 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
735#endif
736#if EV_USE_EPOLL
737 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
738#endif
739#if EV_USE_POLL
740 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
741#endif
742#if EV_USE_SELECT
743 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
744#endif
745
746 ev_watcher_init (&sigev, sigcb);
747 ev_set_priority (&sigev, EV_MAXPRI);
748 }
749}
750
751void
752loop_destroy (EV_P)
753{
754 int i;
755
756#if EV_USE_WIN32
757 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
758#endif
759#if EV_USE_KQUEUE
760 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
761#endif
762#if EV_USE_EPOLL
763 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
764#endif
765#if EV_USE_POLL
766 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
767#endif
768#if EV_USE_SELECT
769 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
770#endif
771
772 for (i = NUMPRI; i--; )
773 array_free (pending, [i]);
774
775 /* have to use the microsoft-never-gets-it-right macro */
776 array_free_microshit (fdchange);
777 array_free_microshit (timer);
778 array_free_microshit (periodic);
779 array_free_microshit (idle);
780 array_free_microshit (prepare);
781 array_free_microshit (check);
782
783 method = 0;
784}
785
786static void
787loop_fork (EV_P)
788{
789#if EV_USE_EPOLL
790 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
791#endif
792#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
794#endif
795
796 if (ev_is_active (&sigev))
797 {
798 /* default loop */
799
800 ev_ref (EV_A);
801 ev_io_stop (EV_A_ &sigev);
802 close (sigpipe [0]);
803 close (sigpipe [1]);
804
805 while (pipe (sigpipe))
806 syserr ("(libev) error creating pipe");
807
808 siginit (EV_A);
809 }
810
811 postfork = 0;
812}
813
814#if EV_MULTIPLICITY
815struct ev_loop *
816ev_loop_new (int methods)
817{
818 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
819
820 memset (loop, 0, sizeof (struct ev_loop));
821
822 loop_init (EV_A_ methods);
823
824 if (ev_method (EV_A))
825 return loop;
826
827 return 0;
828}
829
830void
831ev_loop_destroy (EV_P)
832{
833 loop_destroy (EV_A);
834 ev_free (loop);
835}
836
837void
838ev_loop_fork (EV_P)
839{
840 postfork = 1;
841}
842
843#endif
844
845#if EV_MULTIPLICITY
846struct ev_loop default_loop_struct;
847static struct ev_loop *default_loop;
848
849struct ev_loop *
850#else
851static int default_loop;
852
853int
854#endif
855ev_default_loop (int methods)
856{
857 if (sigpipe [0] == sigpipe [1])
324 if (pipe (sigpipe)) 858 if (pipe (sigpipe))
325 return 0; 859 return 0;
326 860
327 ev_method = EVMETHOD_NONE; 861 if (!default_loop)
328#if HAVE_EPOLL 862 {
329 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 863#if EV_MULTIPLICITY
864 struct ev_loop *loop = default_loop = &default_loop_struct;
865#else
866 default_loop = 1;
330#endif 867#endif
331#if HAVE_SELECT
332 if (ev_method == EVMETHOD_NONE) select_init (flags);
333#endif
334 868
869 loop_init (EV_A_ methods);
870
871 if (ev_method (EV_A))
872 {
873 siginit (EV_A);
874
875#ifndef WIN32
876 ev_signal_init (&childev, childcb, SIGCHLD);
877 ev_set_priority (&childev, EV_MAXPRI);
878 ev_signal_start (EV_A_ &childev);
879 ev_unref (EV_A); /* child watcher should not keep loop alive */
880#endif
881 }
882 else
883 default_loop = 0;
884 }
885
886 return default_loop;
887}
888
889void
890ev_default_destroy (void)
891{
892#if EV_MULTIPLICITY
893 struct ev_loop *loop = default_loop;
894#endif
895
896#ifndef WIN32
897 ev_ref (EV_A); /* child watcher */
898 ev_signal_stop (EV_A_ &childev);
899#endif
900
901 ev_ref (EV_A); /* signal watcher */
902 ev_io_stop (EV_A_ &sigev);
903
904 close (sigpipe [0]); sigpipe [0] = 0;
905 close (sigpipe [1]); sigpipe [1] = 0;
906
907 loop_destroy (EV_A);
908}
909
910void
911ev_default_fork (void)
912{
913#if EV_MULTIPLICITY
914 struct ev_loop *loop = default_loop;
915#endif
916
335 if (ev_method) 917 if (method)
336 { 918 postfork = 1;
337 evw_init (&sigev, sigcb);
338 siginit ();
339 }
340
341 return ev_method;
342} 919}
343 920
344/*****************************************************************************/ 921/*****************************************************************************/
345 922
346void ev_prefork (void)
347{
348 /* nop */
349}
350
351void ev_postfork_parent (void)
352{
353 /* nop */
354}
355
356void ev_postfork_child (void)
357{
358#if HAVE_EPOLL
359 if (ev_method == EVMETHOD_EPOLL)
360 epoll_postfork_child ();
361#endif
362
363 evio_stop (&sigev);
364 close (sigpipe [0]);
365 close (sigpipe [1]);
366 pipe (sigpipe);
367 siginit ();
368}
369
370/*****************************************************************************/
371
372static void 923static int
373fd_reify (void) 924any_pending (EV_P)
374{ 925{
375 int i; 926 int pri;
376 927
377 for (i = 0; i < fdchangecnt; ++i) 928 for (pri = NUMPRI; pri--; )
378 { 929 if (pendingcnt [pri])
379 int fd = fdchanges [i]; 930 return 1;
380 ANFD *anfd = anfds + fd;
381 struct ev_io *w;
382 931
383 int wev = 0; 932 return 0;
384
385 for (w = anfd->head; w; w = w->next)
386 wev |= w->events;
387
388 if (anfd->wev != wev)
389 {
390 method_modify (fd, anfd->wev, wev);
391 anfd->wev = wev;
392 }
393 }
394
395 fdchangecnt = 0;
396} 933}
397 934
398static void 935static void
399call_pending () 936call_pending (EV_P)
400{ 937{
401 int i; 938 int pri;
402 939
403 for (i = 0; i < pendingcnt; ++i) 940 for (pri = NUMPRI; pri--; )
941 while (pendingcnt [pri])
404 { 942 {
405 ANPENDING *p = pendings + i; 943 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
406 944
407 if (p->w) 945 if (p->w)
408 { 946 {
409 p->w->pending = 0; 947 p->w->pending = 0;
410 p->w->cb (p->w, p->events); 948 p->w->cb (EV_A_ p->w, p->events);
411 } 949 }
412 } 950 }
413
414 pendingcnt = 0;
415} 951}
416 952
417static void 953static void
418timers_reify () 954timers_reify (EV_P)
419{ 955{
420 while (timercnt && timers [0]->at <= now) 956 while (timercnt && ((WT)timers [0])->at <= mn_now)
421 { 957 {
422 struct ev_timer *w = timers [0]; 958 struct ev_timer *w = timers [0];
959
960 assert (("inactive timer on timer heap detected", ev_is_active (w)));
423 961
424 /* first reschedule or stop timer */ 962 /* first reschedule or stop timer */
425 if (w->repeat) 963 if (w->repeat)
426 { 964 {
965 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427 w->at = now + w->repeat; 966 ((WT)w)->at = mn_now + w->repeat;
428 assert (("timer timeout in the past, negative repeat?", w->at > now));
429 downheap ((WT *)timers, timercnt, 0); 967 downheap ((WT *)timers, timercnt, 0);
430 } 968 }
431 else 969 else
432 evtimer_stop (w); /* nonrepeating: stop timer */ 970 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433 971
434 event ((W)w, EV_TIMEOUT); 972 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
435 } 973 }
436} 974}
437 975
438static void 976static void
439periodics_reify () 977periodics_reify (EV_P)
440{ 978{
441 while (periodiccnt && periodics [0]->at <= ev_now) 979 while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
442 { 980 {
443 struct ev_periodic *w = periodics [0]; 981 struct ev_periodic *w = periodics [0];
444 982
983 assert (("inactive timer on periodic heap detected", ev_is_active (w)));
984
445 /* first reschedule or stop timer */ 985 /* first reschedule or stop timer */
446 if (w->interval) 986 if (w->reschedule_cb)
447 { 987 {
988 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
989
990 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
991 downheap ((WT *)periodics, periodiccnt, 0);
992 }
993 else if (w->interval)
994 {
448 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 995 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
449 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 996 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
450 downheap ((WT *)periodics, periodiccnt, 0); 997 downheap ((WT *)periodics, periodiccnt, 0);
451 } 998 }
452 else 999 else
453 evperiodic_stop (w); /* nonrepeating: stop timer */ 1000 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454 1001
455 event ((W)w, EV_TIMEOUT); 1002 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
456 } 1003 }
457} 1004}
458 1005
459static void 1006static void
460time_jump (ev_tstamp diff) 1007periodics_reschedule (EV_P)
461{ 1008{
462 int i; 1009 int i;
463 1010
464 /* adjust periodics */ 1011 /* adjust periodics after time jump */
465 for (i = 0; i < periodiccnt; ++i) 1012 for (i = 0; i < periodiccnt; ++i)
466 { 1013 {
467 struct ev_periodic *w = periodics [i]; 1014 struct ev_periodic *w = periodics [i];
468 1015
1016 if (w->reschedule_cb)
1017 ((WT)w)->at = w->reschedule_cb (w, rt_now);
469 if (w->interval) 1018 else if (w->interval)
1019 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1020 }
1021
1022 /* now rebuild the heap */
1023 for (i = periodiccnt >> 1; i--; )
1024 downheap ((WT *)periodics, periodiccnt, i);
1025}
1026
1027inline int
1028time_update_monotonic (EV_P)
1029{
1030 mn_now = get_clock ();
1031
1032 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1033 {
1034 rt_now = rtmn_diff + mn_now;
1035 return 0;
1036 }
1037 else
1038 {
1039 now_floor = mn_now;
1040 rt_now = ev_time ();
1041 return 1;
1042 }
1043}
1044
1045static void
1046time_update (EV_P)
1047{
1048 int i;
1049
1050#if EV_USE_MONOTONIC
1051 if (expect_true (have_monotonic))
1052 {
1053 if (time_update_monotonic (EV_A))
470 { 1054 {
471 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1055 ev_tstamp odiff = rtmn_diff;
472 1056
473 if (fabs (diff) >= 1e-4) 1057 for (i = 4; --i; ) /* loop a few times, before making important decisions */
474 { 1058 {
475 evperiodic_stop (w); 1059 rtmn_diff = rt_now - mn_now;
476 evperiodic_start (w);
477 1060
478 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 1061 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1062 return; /* all is well */
1063
1064 rt_now = ev_time ();
1065 mn_now = get_clock ();
1066 now_floor = mn_now;
479 } 1067 }
1068
1069 periodics_reschedule (EV_A);
1070 /* no timer adjustment, as the monotonic clock doesn't jump */
1071 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
480 } 1072 }
481 } 1073 }
482 1074 else
483 /* adjust timers. this is easy, as the offset is the same for all */ 1075#endif
484 for (i = 0; i < timercnt; ++i) 1076 {
485 timers [i]->at += diff;
486}
487
488static void
489time_update ()
490{
491 int i;
492
493 ev_now = ev_time (); 1077 rt_now = ev_time ();
494 1078
495 if (have_monotonic) 1079 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
496 {
497 ev_tstamp odiff = diff;
498
499 for (i = 4; --i; ) /* loop a few times, before making important decisions */
500 { 1080 {
501 now = get_clock (); 1081 periodics_reschedule (EV_A);
502 diff = ev_now - now;
503 1082
504 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1083 /* adjust timers. this is easy, as the offset is the same for all */
505 return; /* all is well */ 1084 for (i = 0; i < timercnt; ++i)
506 1085 ((WT)timers [i])->at += rt_now - mn_now;
507 ev_now = ev_time ();
508 } 1086 }
509 1087
510 time_jump (diff - odiff);
511 }
512 else
513 {
514 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
515 time_jump (ev_now - now);
516
517 now = ev_now; 1088 mn_now = rt_now;
518 } 1089 }
519} 1090}
520 1091
521int ev_loop_done; 1092void
1093ev_ref (EV_P)
1094{
1095 ++activecnt;
1096}
522 1097
1098void
1099ev_unref (EV_P)
1100{
1101 --activecnt;
1102}
1103
1104static int loop_done;
1105
1106void
523void ev_loop (int flags) 1107ev_loop (EV_P_ int flags)
524{ 1108{
525 double block; 1109 double block;
526 ev_loop_done = flags & EVLOOP_ONESHOT; 1110 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 1111
534 do 1112 do
535 { 1113 {
1114 /* queue check watchers (and execute them) */
1115 if (expect_false (preparecnt))
1116 {
1117 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1118 call_pending (EV_A);
1119 }
1120
1121 /* we might have forked, so reify kernel state if necessary */
1122 if (expect_false (postfork))
1123 loop_fork (EV_A);
1124
536 /* update fd-related kernel structures */ 1125 /* update fd-related kernel structures */
537 fd_reify (); 1126 fd_reify (EV_A);
538 1127
539 /* calculate blocking time */ 1128 /* calculate blocking time */
540 1129
541 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1130 /* we only need this for !monotonic clock or timers, but as we basically
1131 always have timers, we just calculate it always */
1132#if EV_USE_MONOTONIC
1133 if (expect_true (have_monotonic))
1134 time_update_monotonic (EV_A);
1135 else
1136#endif
1137 {
542 ev_now = ev_time (); 1138 rt_now = ev_time ();
1139 mn_now = rt_now;
1140 }
543 1141
544 if (flags & EVLOOP_NONBLOCK || idlecnt) 1142 if (flags & EVLOOP_NONBLOCK || idlecnt)
545 block = 0.; 1143 block = 0.;
546 else 1144 else
547 { 1145 {
548 block = MAX_BLOCKTIME; 1146 block = MAX_BLOCKTIME;
549 1147
550 if (timercnt) 1148 if (timercnt)
551 { 1149 {
552 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 1150 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
553 if (block > to) block = to; 1151 if (block > to) block = to;
554 } 1152 }
555 1153
556 if (periodiccnt) 1154 if (periodiccnt)
557 { 1155 {
558 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1156 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
559 if (block > to) block = to; 1157 if (block > to) block = to;
560 } 1158 }
561 1159
562 if (block < 0.) block = 0.; 1160 if (block < 0.) block = 0.;
563 } 1161 }
564 1162
565 method_poll (block); 1163 method_poll (EV_A_ block);
566 1164
567 /* update ev_now, do magic */ 1165 /* update rt_now, do magic */
568 time_update (); 1166 time_update (EV_A);
569 1167
570 /* queue pending timers and reschedule them */ 1168 /* queue pending timers and reschedule them */
1169 timers_reify (EV_A); /* relative timers called last */
571 periodics_reify (); /* absolute timers first */ 1170 periodics_reify (EV_A); /* absolute timers called first */
572 timers_reify (); /* relative timers second */
573 1171
574 /* queue idle watchers unless io or timers are pending */ 1172 /* queue idle watchers unless io or timers are pending */
575 if (!pendingcnt) 1173 if (idlecnt && !any_pending (EV_A))
576 queue_events ((W *)idles, idlecnt, EV_IDLE); 1174 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577 1175
578 /* queue check and possibly idle watchers */ 1176 /* queue check watchers, to be executed first */
1177 if (checkcnt)
579 queue_events ((W *)checks, checkcnt, EV_CHECK); 1178 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580 1179
581 call_pending (); 1180 call_pending (EV_A);
582 } 1181 }
583 while (!ev_loop_done); 1182 while (activecnt && !loop_done);
1183
1184 if (loop_done != 2)
1185 loop_done = 0;
1186}
1187
1188void
1189ev_unloop (EV_P_ int how)
1190{
1191 loop_done = how;
584} 1192}
585 1193
586/*****************************************************************************/ 1194/*****************************************************************************/
587 1195
588static void 1196inline void
589wlist_add (WL *head, WL elem) 1197wlist_add (WL *head, WL elem)
590{ 1198{
591 elem->next = *head; 1199 elem->next = *head;
592 *head = elem; 1200 *head = elem;
593} 1201}
594 1202
595static void 1203inline void
596wlist_del (WL *head, WL elem) 1204wlist_del (WL *head, WL elem)
597{ 1205{
598 while (*head) 1206 while (*head)
599 { 1207 {
600 if (*head == elem) 1208 if (*head == elem)
605 1213
606 head = &(*head)->next; 1214 head = &(*head)->next;
607 } 1215 }
608} 1216}
609 1217
610static void 1218inline void
1219ev_clear_pending (EV_P_ W w)
1220{
1221 if (w->pending)
1222 {
1223 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1224 w->pending = 0;
1225 }
1226}
1227
1228inline void
611ev_start (W w, int active) 1229ev_start (EV_P_ W w, int active)
612{ 1230{
613 w->pending = 0; 1231 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1232 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1233
614 w->active = active; 1234 w->active = active;
1235 ev_ref (EV_A);
615} 1236}
616 1237
617static void 1238inline void
618ev_stop (W w) 1239ev_stop (EV_P_ W w)
619{ 1240{
620 if (w->pending) 1241 ev_unref (EV_A);
621 pendings [w->pending - 1].w = 0;
622
623 w->active = 0; 1242 w->active = 0;
624} 1243}
625 1244
626/*****************************************************************************/ 1245/*****************************************************************************/
627 1246
628void 1247void
629evio_start (struct ev_io *w) 1248ev_io_start (EV_P_ struct ev_io *w)
630{ 1249{
1250 int fd = w->fd;
1251
631 if (ev_is_active (w)) 1252 if (ev_is_active (w))
632 return; 1253 return;
633 1254
634 int fd = w->fd; 1255 assert (("ev_io_start called with negative fd", fd >= 0));
635 1256
636 ev_start ((W)w, 1); 1257 ev_start (EV_A_ (W)w, 1);
637 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1258 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
638 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1259 wlist_add ((WL *)&anfds[fd].head, (WL)w);
639 1260
640 ++fdchangecnt; 1261 fd_change (EV_A_ fd);
641 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642 fdchanges [fdchangecnt - 1] = fd;
643} 1262}
644 1263
645void 1264void
646evio_stop (struct ev_io *w) 1265ev_io_stop (EV_P_ struct ev_io *w)
647{ 1266{
1267 ev_clear_pending (EV_A_ (W)w);
648 if (!ev_is_active (w)) 1268 if (!ev_is_active (w))
649 return; 1269 return;
650 1270
651 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1271 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652 ev_stop ((W)w); 1272 ev_stop (EV_A_ (W)w);
653 1273
654 ++fdchangecnt; 1274 fd_change (EV_A_ w->fd);
655 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656 fdchanges [fdchangecnt - 1] = w->fd;
657} 1275}
658 1276
659
660void 1277void
661evtimer_start (struct ev_timer *w) 1278ev_timer_start (EV_P_ struct ev_timer *w)
662{ 1279{
663 if (ev_is_active (w)) 1280 if (ev_is_active (w))
664 return; 1281 return;
665 1282
666 w->at += now; 1283 ((WT)w)->at += mn_now;
667 1284
1285 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1286
668 ev_start ((W)w, ++timercnt); 1287 ev_start (EV_A_ (W)w, ++timercnt);
669 array_needsize (timers, timermax, timercnt, ); 1288 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
670 timers [timercnt - 1] = w; 1289 timers [timercnt - 1] = w;
671 upheap ((WT *)timers, timercnt - 1); 1290 upheap ((WT *)timers, timercnt - 1);
672}
673 1291
1292 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1293}
1294
674void 1295void
675evtimer_stop (struct ev_timer *w) 1296ev_timer_stop (EV_P_ struct ev_timer *w)
676{ 1297{
1298 ev_clear_pending (EV_A_ (W)w);
677 if (!ev_is_active (w)) 1299 if (!ev_is_active (w))
678 return; 1300 return;
679 1301
1302 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1303
680 if (w->active < timercnt--) 1304 if (((W)w)->active < timercnt--)
681 { 1305 {
682 timers [w->active - 1] = timers [timercnt]; 1306 timers [((W)w)->active - 1] = timers [timercnt];
683 downheap ((WT *)timers, timercnt, w->active - 1); 1307 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684 } 1308 }
685 1309
1310 ((WT)w)->at = w->repeat;
1311
686 ev_stop ((W)w); 1312 ev_stop (EV_A_ (W)w);
687} 1313}
688 1314
689void 1315void
690evperiodic_start (struct ev_periodic *w) 1316ev_timer_again (EV_P_ struct ev_timer *w)
691{ 1317{
692 if (ev_is_active (w)) 1318 if (ev_is_active (w))
693 return; 1319 {
1320 if (w->repeat)
1321 {
1322 ((WT)w)->at = mn_now + w->repeat;
1323 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1324 }
1325 else
1326 ev_timer_stop (EV_A_ w);
1327 }
1328 else if (w->repeat)
1329 ev_timer_start (EV_A_ w);
1330}
694 1331
1332void
1333ev_periodic_start (EV_P_ struct ev_periodic *w)
1334{
1335 if (ev_is_active (w))
1336 return;
1337
1338 if (w->reschedule_cb)
1339 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1340 else if (w->interval)
1341 {
1342 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
695 /* this formula differs from the one in periodic_reify because we do not always round up */ 1343 /* this formula differs from the one in periodic_reify because we do not always round up */
696 if (w->interval)
697 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1344 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1345 }
698 1346
699 ev_start ((W)w, ++periodiccnt); 1347 ev_start (EV_A_ (W)w, ++periodiccnt);
700 array_needsize (periodics, periodicmax, periodiccnt, ); 1348 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
701 periodics [periodiccnt - 1] = w; 1349 periodics [periodiccnt - 1] = w;
702 upheap ((WT *)periodics, periodiccnt - 1); 1350 upheap ((WT *)periodics, periodiccnt - 1);
703}
704 1351
1352 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1353}
1354
705void 1355void
706evperiodic_stop (struct ev_periodic *w) 1356ev_periodic_stop (EV_P_ struct ev_periodic *w)
707{ 1357{
1358 ev_clear_pending (EV_A_ (W)w);
708 if (!ev_is_active (w)) 1359 if (!ev_is_active (w))
709 return; 1360 return;
710 1361
1362 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1363
711 if (w->active < periodiccnt--) 1364 if (((W)w)->active < periodiccnt--)
712 { 1365 {
713 periodics [w->active - 1] = periodics [periodiccnt]; 1366 periodics [((W)w)->active - 1] = periodics [periodiccnt];
714 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1367 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715 } 1368 }
716 1369
717 ev_stop ((W)w); 1370 ev_stop (EV_A_ (W)w);
718} 1371}
719 1372
720void 1373void
721evsignal_start (struct ev_signal *w) 1374ev_periodic_again (EV_P_ struct ev_periodic *w)
1375{
1376 ev_periodic_stop (EV_A_ w);
1377 ev_periodic_start (EV_A_ w);
1378}
1379
1380void
1381ev_idle_start (EV_P_ struct ev_idle *w)
722{ 1382{
723 if (ev_is_active (w)) 1383 if (ev_is_active (w))
724 return; 1384 return;
725 1385
1386 ev_start (EV_A_ (W)w, ++idlecnt);
1387 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1388 idles [idlecnt - 1] = w;
1389}
1390
1391void
1392ev_idle_stop (EV_P_ struct ev_idle *w)
1393{
1394 ev_clear_pending (EV_A_ (W)w);
1395 if (ev_is_active (w))
1396 return;
1397
1398 idles [((W)w)->active - 1] = idles [--idlecnt];
1399 ev_stop (EV_A_ (W)w);
1400}
1401
1402void
1403ev_prepare_start (EV_P_ struct ev_prepare *w)
1404{
1405 if (ev_is_active (w))
1406 return;
1407
1408 ev_start (EV_A_ (W)w, ++preparecnt);
1409 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1410 prepares [preparecnt - 1] = w;
1411}
1412
1413void
1414ev_prepare_stop (EV_P_ struct ev_prepare *w)
1415{
1416 ev_clear_pending (EV_A_ (W)w);
1417 if (ev_is_active (w))
1418 return;
1419
1420 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1421 ev_stop (EV_A_ (W)w);
1422}
1423
1424void
1425ev_check_start (EV_P_ struct ev_check *w)
1426{
1427 if (ev_is_active (w))
1428 return;
1429
1430 ev_start (EV_A_ (W)w, ++checkcnt);
1431 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1432 checks [checkcnt - 1] = w;
1433}
1434
1435void
1436ev_check_stop (EV_P_ struct ev_check *w)
1437{
1438 ev_clear_pending (EV_A_ (W)w);
1439 if (ev_is_active (w))
1440 return;
1441
1442 checks [((W)w)->active - 1] = checks [--checkcnt];
1443 ev_stop (EV_A_ (W)w);
1444}
1445
1446#ifndef SA_RESTART
1447# define SA_RESTART 0
1448#endif
1449
1450void
1451ev_signal_start (EV_P_ struct ev_signal *w)
1452{
1453#if EV_MULTIPLICITY
1454 assert (("signal watchers are only supported in the default loop", loop == default_loop));
1455#endif
1456 if (ev_is_active (w))
1457 return;
1458
1459 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1460
726 ev_start ((W)w, 1); 1461 ev_start (EV_A_ (W)w, 1);
727 array_needsize (signals, signalmax, w->signum, signals_init); 1462 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
728 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1463 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729 1464
730 if (!w->next) 1465 if (!((WL)w)->next)
731 { 1466 {
1467#if WIN32
1468 signal (w->signum, sighandler);
1469#else
732 struct sigaction sa; 1470 struct sigaction sa;
733 sa.sa_handler = sighandler; 1471 sa.sa_handler = sighandler;
734 sigfillset (&sa.sa_mask); 1472 sigfillset (&sa.sa_mask);
735 sa.sa_flags = 0; 1473 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736 sigaction (w->signum, &sa, 0); 1474 sigaction (w->signum, &sa, 0);
1475#endif
737 } 1476 }
738} 1477}
739 1478
740void 1479void
741evsignal_stop (struct ev_signal *w) 1480ev_signal_stop (EV_P_ struct ev_signal *w)
742{ 1481{
1482 ev_clear_pending (EV_A_ (W)w);
743 if (!ev_is_active (w)) 1483 if (!ev_is_active (w))
744 return; 1484 return;
745 1485
746 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1486 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747 ev_stop ((W)w); 1487 ev_stop (EV_A_ (W)w);
748 1488
749 if (!signals [w->signum - 1].head) 1489 if (!signals [w->signum - 1].head)
750 signal (w->signum, SIG_DFL); 1490 signal (w->signum, SIG_DFL);
751} 1491}
752 1492
753void evidle_start (struct ev_idle *w) 1493void
1494ev_child_start (EV_P_ struct ev_child *w)
754{ 1495{
1496#if EV_MULTIPLICITY
1497 assert (("child watchers are only supported in the default loop", loop == default_loop));
1498#endif
755 if (ev_is_active (w)) 1499 if (ev_is_active (w))
756 return; 1500 return;
757 1501
758 ev_start ((W)w, ++idlecnt); 1502 ev_start (EV_A_ (W)w, 1);
759 array_needsize (idles, idlemax, idlecnt, ); 1503 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760 idles [idlecnt - 1] = w;
761} 1504}
762 1505
763void evidle_stop (struct ev_idle *w) 1506void
1507ev_child_stop (EV_P_ struct ev_child *w)
764{ 1508{
765 idles [w->active - 1] = idles [--idlecnt]; 1509 ev_clear_pending (EV_A_ (W)w);
766 ev_stop ((W)w);
767}
768
769void evcheck_start (struct ev_check *w)
770{
771 if (ev_is_active (w)) 1510 if (ev_is_active (w))
772 return; 1511 return;
773 1512
774 ev_start ((W)w, ++checkcnt); 1513 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
775 array_needsize (checks, checkmax, checkcnt, );
776 checks [checkcnt - 1] = w;
777}
778
779void evcheck_stop (struct ev_check *w)
780{
781 checks [w->active - 1] = checks [--checkcnt];
782 ev_stop ((W)w); 1514 ev_stop (EV_A_ (W)w);
783} 1515}
784 1516
785/*****************************************************************************/ 1517/*****************************************************************************/
786 1518
787#if 1 1519struct ev_once
788 1520{
789struct ev_io wio; 1521 struct ev_io io;
790
791static void
792sin_cb (struct ev_io *w, int revents)
793{
794 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
795}
796
797static void
798ocb (struct ev_timer *w, int revents)
799{
800 //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);
802 evtimer_start (w);
803}
804
805static void
806scb (struct ev_signal *w, int revents)
807{
808 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809 evio_stop (&wio);
810 evio_start (&wio);
811}
812
813static void
814gcb (struct ev_signal *w, int revents)
815{
816 fprintf (stderr, "generic %x\n", revents);
817
818}
819
820int main (void)
821{
822 ev_init (0);
823
824 evio_init (&wio, sin_cb, 0, EV_READ);
825 evio_start (&wio);
826
827 struct ev_timer t[10000];
828
829#if 0
830 int i;
831 for (i = 0; i < 10000; ++i)
832 {
833 struct ev_timer *w = t + i;
834 evw_init (w, ocb, i);
835 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836 evtimer_start (w);
837 if (drand48 () < 0.5)
838 evtimer_stop (w);
839 }
840#endif
841
842 struct ev_timer t1; 1522 struct ev_timer to;
843 evtimer_init (&t1, ocb, 5, 10); 1523 void (*cb)(int revents, void *arg);
844 evtimer_start (&t1); 1524 void *arg;
1525};
845 1526
846 struct ev_signal sig; 1527static void
847 evsignal_init (&sig, scb, SIGQUIT); 1528once_cb (EV_P_ struct ev_once *once, int revents)
848 evsignal_start (&sig); 1529{
1530 void (*cb)(int revents, void *arg) = once->cb;
1531 void *arg = once->arg;
849 1532
850 struct ev_check cw; 1533 ev_io_stop (EV_A_ &once->io);
851 evcheck_init (&cw, gcb); 1534 ev_timer_stop (EV_A_ &once->to);
852 evcheck_start (&cw); 1535 ev_free (once);
853 1536
854 struct ev_idle iw; 1537 cb (revents, arg);
855 evidle_init (&iw, gcb);
856 evidle_start (&iw);
857
858 ev_loop (0);
859
860 return 0;
861} 1538}
862 1539
863#endif 1540static void
1541once_cb_io (EV_P_ struct ev_io *w, int revents)
1542{
1543 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1544}
864 1545
1546static void
1547once_cb_to (EV_P_ struct ev_timer *w, int revents)
1548{
1549 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1550}
865 1551
1552void
1553ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1554{
1555 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
866 1556
1557 if (!once)
1558 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1559 else
1560 {
1561 once->cb = cb;
1562 once->arg = arg;
867 1563
1564 ev_watcher_init (&once->io, once_cb_io);
1565 if (fd >= 0)
1566 {
1567 ev_io_set (&once->io, fd, events);
1568 ev_io_start (EV_A_ &once->io);
1569 }
1570
1571 ev_watcher_init (&once->to, once_cb_to);
1572 if (timeout >= 0.)
1573 {
1574 ev_timer_set (&once->to, timeout, 0.);
1575 ev_timer_start (EV_A_ &once->to);
1576 }
1577 }
1578}
1579

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