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Comparing libev/ev.c (file contents):
Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
… …
51# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 61# define EV_USE_MONOTONIC 0
53# endif 62# endif
54# ifndef EV_USE_REALTIME 63# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
56# endif 73# endif
57# endif 74# endif
58 75
59# ifndef EV_USE_SELECT 76# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 77# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
94# else 111# else
95# define EV_USE_PORT 0 112# define EV_USE_PORT 0
96# endif 113# endif
97# endif 114# endif
98 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
99#endif 132#endif
100 133
101#include <math.h> 134#include <math.h>
102#include <stdlib.h> 135#include <stdlib.h>
103#include <fcntl.h> 136#include <fcntl.h>
… …
110#include <sys/types.h> 143#include <sys/types.h>
111#include <time.h> 144#include <time.h>
112 145
113#include <signal.h> 146#include <signal.h>
114 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
115#ifndef _WIN32 154#ifndef _WIN32
116# include <unistd.h>
117# include <sys/time.h> 155# include <sys/time.h>
118# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
119#else 158#else
120# define WIN32_LEAN_AND_MEAN 159# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 160# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
124# endif 163# endif
125#endif 164#endif
126 165
127/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
128 167
129#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
130# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
131#endif 170#endif
132 171
133#ifndef EV_USE_REALTIME 172#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
135#endif 178#endif
136 179
137#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
139#endif 182#endif
… …
145# define EV_USE_POLL 1 188# define EV_USE_POLL 1
146# endif 189# endif
147#endif 190#endif
148 191
149#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
150# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
151#endif 198#endif
152 199
153#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
155#endif 202#endif
156 203
157#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 205# define EV_USE_PORT 0
159#endif 206#endif
160 207
161/**/ 208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL
242#endif
243
244#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL
246#endif
247
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */
162 249
163#ifndef CLOCK_MONOTONIC 250#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 251# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 252# define EV_USE_MONOTONIC 0
166#endif 253#endif
… …
168#ifndef CLOCK_REALTIME 255#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 256# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 257# define EV_USE_REALTIME 0
171#endif 258#endif
172 259
260#if !EV_STAT_ENABLE
261# undef EV_USE_INOTIFY
262# define EV_USE_INOTIFY 0
263#endif
264
265#if !EV_USE_NANOSLEEP
266# ifndef _WIN32
267# include <sys/select.h>
268# endif
269#endif
270
271#if EV_USE_INOTIFY
272# include <sys/inotify.h>
273#endif
274
173#if EV_SELECT_IS_WINSOCKET 275#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 276# include <winsock.h>
175#endif 277#endif
176 278
279#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h>
282# ifdef __cplusplus
283extern "C" {
284# endif
285int eventfd (unsigned int initval, int flags);
286# ifdef __cplusplus
287}
288# endif
289#endif
290
177/**/ 291/**/
292
293/*
294 * This is used to avoid floating point rounding problems.
295 * It is added to ev_rt_now when scheduling periodics
296 * to ensure progress, time-wise, even when rounding
297 * errors are against us.
298 * This value is good at least till the year 4000.
299 * Better solutions welcome.
300 */
301#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178 302
179#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 303#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 304#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 305/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183 306
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 307#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 308# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline static inline 309# define noinline __attribute__ ((noinline))
193#else 310#else
194# define expect(expr,value) (expr) 311# define expect(expr,value) (expr)
195# define inline static 312# define noinline
313# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
314# define inline
315# endif
196#endif 316#endif
197 317
198#define expect_false(expr) expect ((expr) != 0, 0) 318#define expect_false(expr) expect ((expr) != 0, 0)
199#define expect_true(expr) expect ((expr) != 0, 1) 319#define expect_true(expr) expect ((expr) != 0, 1)
320#define inline_size static inline
321
322#if EV_MINIMAL
323# define inline_speed static noinline
324#else
325# define inline_speed static inline
326#endif
200 327
201#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 328#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
202#define ABSPRI(w) ((w)->priority - EV_MINPRI) 329#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
203 330
204#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 331#define EMPTY /* required for microsofts broken pseudo-c compiler */
205#define EMPTY2(a,b) /* used to suppress some warnings */ 332#define EMPTY2(a,b) /* used to suppress some warnings */
206 333
207typedef ev_watcher *W; 334typedef ev_watcher *W;
208typedef ev_watcher_list *WL; 335typedef ev_watcher_list *WL;
209typedef ev_watcher_time *WT; 336typedef ev_watcher_time *WT;
210 337
338#define ev_active(w) ((W)(w))->active
339#define ev_at(w) ((WT)(w))->at
340
341#if EV_USE_MONOTONIC
342/* sig_atomic_t is used to avoid per-thread variables or locking but still */
343/* giving it a reasonably high chance of working on typical architetcures */
211static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
345#endif
212 346
213#ifdef _WIN32 347#ifdef _WIN32
214# include "ev_win32.c" 348# include "ev_win32.c"
215#endif 349#endif
216 350
217/*****************************************************************************/ 351/*****************************************************************************/
218 352
219static void (*syserr_cb)(const char *msg); 353static void (*syserr_cb)(const char *msg);
220 354
355void
221void ev_set_syserr_cb (void (*cb)(const char *msg)) 356ev_set_syserr_cb (void (*cb)(const char *msg))
222{ 357{
223 syserr_cb = cb; 358 syserr_cb = cb;
224} 359}
225 360
226static void 361static void noinline
227syserr (const char *msg) 362syserr (const char *msg)
228{ 363{
229 if (!msg) 364 if (!msg)
230 msg = "(libev) system error"; 365 msg = "(libev) system error";
231 366
… …
236 perror (msg); 371 perror (msg);
237 abort (); 372 abort ();
238 } 373 }
239} 374}
240 375
376static void *
377ev_realloc_emul (void *ptr, long size)
378{
379 /* some systems, notably openbsd and darwin, fail to properly
380 * implement realloc (x, 0) (as required by both ansi c-98 and
381 * the single unix specification, so work around them here.
382 */
383
384 if (size)
385 return realloc (ptr, size);
386
387 free (ptr);
388 return 0;
389}
390
241static void *(*alloc)(void *ptr, long size); 391static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
242 392
393void
243void ev_set_allocator (void *(*cb)(void *ptr, long size)) 394ev_set_allocator (void *(*cb)(void *ptr, long size))
244{ 395{
245 alloc = cb; 396 alloc = cb;
246} 397}
247 398
248static void * 399inline_speed void *
249ev_realloc (void *ptr, long size) 400ev_realloc (void *ptr, long size)
250{ 401{
251 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 402 ptr = alloc (ptr, size);
252 403
253 if (!ptr && size) 404 if (!ptr && size)
254 { 405 {
255 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 406 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
256 abort (); 407 abort ();
… …
277typedef struct 428typedef struct
278{ 429{
279 W w; 430 W w;
280 int events; 431 int events;
281} ANPENDING; 432} ANPENDING;
433
434#if EV_USE_INOTIFY
435/* hash table entry per inotify-id */
436typedef struct
437{
438 WL head;
439} ANFS;
440#endif
441
442/* Heap Entry */
443#if EV_HEAP_CACHE_AT
444 typedef struct {
445 ev_tstamp at;
446 WT w;
447 } ANHE;
448
449 #define ANHE_w(he) (he).w /* access watcher, read-write */
450 #define ANHE_at(he) (he).at /* access cached at, read-only */
451 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
452#else
453 typedef WT ANHE;
454
455 #define ANHE_w(he) (he)
456 #define ANHE_at(he) (he)->at
457 #define ANHE_at_set(he)
458#endif
282 459
283#if EV_MULTIPLICITY 460#if EV_MULTIPLICITY
284 461
285 struct ev_loop 462 struct ev_loop
286 { 463 {
… …
320 gettimeofday (&tv, 0); 497 gettimeofday (&tv, 0);
321 return tv.tv_sec + tv.tv_usec * 1e-6; 498 return tv.tv_sec + tv.tv_usec * 1e-6;
322#endif 499#endif
323} 500}
324 501
325inline ev_tstamp 502ev_tstamp inline_size
326get_clock (void) 503get_clock (void)
327{ 504{
328#if EV_USE_MONOTONIC 505#if EV_USE_MONOTONIC
329 if (expect_true (have_monotonic)) 506 if (expect_true (have_monotonic))
330 { 507 {
… …
343{ 520{
344 return ev_rt_now; 521 return ev_rt_now;
345} 522}
346#endif 523#endif
347 524
348#define array_roundsize(type,n) (((n) | 4) & ~3) 525void
526ev_sleep (ev_tstamp delay)
527{
528 if (delay > 0.)
529 {
530#if EV_USE_NANOSLEEP
531 struct timespec ts;
532
533 ts.tv_sec = (time_t)delay;
534 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
535
536 nanosleep (&ts, 0);
537#elif defined(_WIN32)
538 Sleep ((unsigned long)(delay * 1e3));
539#else
540 struct timeval tv;
541
542 tv.tv_sec = (time_t)delay;
543 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
544
545 select (0, 0, 0, 0, &tv);
546#endif
547 }
548}
549
550/*****************************************************************************/
551
552#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
553
554int inline_size
555array_nextsize (int elem, int cur, int cnt)
556{
557 int ncur = cur + 1;
558
559 do
560 ncur <<= 1;
561 while (cnt > ncur);
562
563 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
564 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
565 {
566 ncur *= elem;
567 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
568 ncur = ncur - sizeof (void *) * 4;
569 ncur /= elem;
570 }
571
572 return ncur;
573}
574
575static noinline void *
576array_realloc (int elem, void *base, int *cur, int cnt)
577{
578 *cur = array_nextsize (elem, *cur, cnt);
579 return ev_realloc (base, elem * *cur);
580}
349 581
350#define array_needsize(type,base,cur,cnt,init) \ 582#define array_needsize(type,base,cur,cnt,init) \
351 if (expect_false ((cnt) > cur)) \ 583 if (expect_false ((cnt) > (cur))) \
352 { \ 584 { \
353 int newcnt = cur; \ 585 int ocur_ = (cur); \
354 do \ 586 (base) = (type *)array_realloc \
355 { \ 587 (sizeof (type), (base), &(cur), (cnt)); \
356 newcnt = array_roundsize (type, newcnt << 1); \ 588 init ((base) + (ocur_), (cur) - ocur_); \
357 } \
358 while ((cnt) > newcnt); \
359 \
360 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361 init (base + cur, newcnt - cur); \
362 cur = newcnt; \
363 } 589 }
364 590
591#if 0
365#define array_slim(type,stem) \ 592#define array_slim(type,stem) \
366 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 593 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367 { \ 594 { \
368 stem ## max = array_roundsize (stem ## cnt >> 1); \ 595 stem ## max = array_roundsize (stem ## cnt >> 1); \
369 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 596 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 597 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371 } 598 }
599#endif
372 600
373#define array_free(stem, idx) \ 601#define array_free(stem, idx) \
374 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 602 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
375 603
376/*****************************************************************************/ 604/*****************************************************************************/
377 605
378static void 606void noinline
607ev_feed_event (EV_P_ void *w, int revents)
608{
609 W w_ = (W)w;
610 int pri = ABSPRI (w_);
611
612 if (expect_false (w_->pending))
613 pendings [pri][w_->pending - 1].events |= revents;
614 else
615 {
616 w_->pending = ++pendingcnt [pri];
617 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
618 pendings [pri][w_->pending - 1].w = w_;
619 pendings [pri][w_->pending - 1].events = revents;
620 }
621}
622
623void inline_speed
624queue_events (EV_P_ W *events, int eventcnt, int type)
625{
626 int i;
627
628 for (i = 0; i < eventcnt; ++i)
629 ev_feed_event (EV_A_ events [i], type);
630}
631
632/*****************************************************************************/
633
634void inline_size
379anfds_init (ANFD *base, int count) 635anfds_init (ANFD *base, int count)
380{ 636{
381 while (count--) 637 while (count--)
382 { 638 {
383 base->head = 0; 639 base->head = 0;
… …
386 642
387 ++base; 643 ++base;
388 } 644 }
389} 645}
390 646
391void 647void inline_speed
392ev_feed_event (EV_P_ void *w, int revents)
393{
394 W w_ = (W)w;
395
396 if (expect_false (w_->pending))
397 {
398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
399 return;
400 }
401
402 w_->pending = ++pendingcnt [ABSPRI (w_)];
403 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
404 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
405 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
406}
407
408static void
409queue_events (EV_P_ W *events, int eventcnt, int type)
410{
411 int i;
412
413 for (i = 0; i < eventcnt; ++i)
414 ev_feed_event (EV_A_ events [i], type);
415}
416
417inline void
418fd_event (EV_P_ int fd, int revents) 648fd_event (EV_P_ int fd, int revents)
419{ 649{
420 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
421 ev_io *w; 651 ev_io *w;
422 652
… …
430} 660}
431 661
432void 662void
433ev_feed_fd_event (EV_P_ int fd, int revents) 663ev_feed_fd_event (EV_P_ int fd, int revents)
434{ 664{
665 if (fd >= 0 && fd < anfdmax)
435 fd_event (EV_A_ fd, revents); 666 fd_event (EV_A_ fd, revents);
436} 667}
437 668
438/*****************************************************************************/ 669void inline_size
439
440inline void
441fd_reify (EV_P) 670fd_reify (EV_P)
442{ 671{
443 int i; 672 int i;
444 673
445 for (i = 0; i < fdchangecnt; ++i) 674 for (i = 0; i < fdchangecnt; ++i)
446 { 675 {
447 int fd = fdchanges [i]; 676 int fd = fdchanges [i];
448 ANFD *anfd = anfds + fd; 677 ANFD *anfd = anfds + fd;
449 ev_io *w; 678 ev_io *w;
450 679
451 int events = 0; 680 unsigned char events = 0;
452 681
453 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
454 events |= w->events; 683 events |= (unsigned char)w->events;
455 684
456#if EV_SELECT_IS_WINSOCKET 685#if EV_SELECT_IS_WINSOCKET
457 if (events) 686 if (events)
458 { 687 {
459 unsigned long argp; 688 unsigned long argp;
689 #ifdef EV_FD_TO_WIN32_HANDLE
690 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
691 #else
460 anfd->handle = _get_osfhandle (fd); 692 anfd->handle = _get_osfhandle (fd);
693 #endif
461 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 694 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
462 } 695 }
463#endif 696#endif
464 697
698 {
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
465 anfd->reify = 0; 702 anfd->reify = 0;
466
467 backend_modify (EV_A_ fd, anfd->events, events);
468 anfd->events = events; 703 anfd->events = events;
704
705 if (o_events != events || o_reify & EV_IOFDSET)
706 backend_modify (EV_A_ fd, o_events, events);
707 }
469 } 708 }
470 709
471 fdchangecnt = 0; 710 fdchangecnt = 0;
472} 711}
473 712
474static void 713void inline_size
475fd_change (EV_P_ int fd) 714fd_change (EV_P_ int fd, int flags)
476{ 715{
477 if (expect_false (anfds [fd].reify)) 716 unsigned char reify = anfds [fd].reify;
478 return;
479
480 anfds [fd].reify = 1; 717 anfds [fd].reify |= flags;
481 718
719 if (expect_true (!reify))
720 {
482 ++fdchangecnt; 721 ++fdchangecnt;
483 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
484 fdchanges [fdchangecnt - 1] = fd; 723 fdchanges [fdchangecnt - 1] = fd;
724 }
485} 725}
486 726
487static void 727void inline_speed
488fd_kill (EV_P_ int fd) 728fd_kill (EV_P_ int fd)
489{ 729{
490 ev_io *w; 730 ev_io *w;
491 731
492 while ((w = (ev_io *)anfds [fd].head)) 732 while ((w = (ev_io *)anfds [fd].head))
… …
494 ev_io_stop (EV_A_ w); 734 ev_io_stop (EV_A_ w);
495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 735 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
496 } 736 }
497} 737}
498 738
499inline int 739int inline_size
500fd_valid (int fd) 740fd_valid (int fd)
501{ 741{
502#ifdef _WIN32 742#ifdef _WIN32
503 return _get_osfhandle (fd) != -1; 743 return _get_osfhandle (fd) != -1;
504#else 744#else
505 return fcntl (fd, F_GETFD) != -1; 745 return fcntl (fd, F_GETFD) != -1;
506#endif 746#endif
507} 747}
508 748
509/* called on EBADF to verify fds */ 749/* called on EBADF to verify fds */
510static void 750static void noinline
511fd_ebadf (EV_P) 751fd_ebadf (EV_P)
512{ 752{
513 int fd; 753 int fd;
514 754
515 for (fd = 0; fd < anfdmax; ++fd) 755 for (fd = 0; fd < anfdmax; ++fd)
… …
517 if (!fd_valid (fd) == -1 && errno == EBADF) 757 if (!fd_valid (fd) == -1 && errno == EBADF)
518 fd_kill (EV_A_ fd); 758 fd_kill (EV_A_ fd);
519} 759}
520 760
521/* called on ENOMEM in select/poll to kill some fds and retry */ 761/* called on ENOMEM in select/poll to kill some fds and retry */
522static void 762static void noinline
523fd_enomem (EV_P) 763fd_enomem (EV_P)
524{ 764{
525 int fd; 765 int fd;
526 766
527 for (fd = anfdmax; fd--; ) 767 for (fd = anfdmax; fd--; )
… …
531 return; 771 return;
532 } 772 }
533} 773}
534 774
535/* usually called after fork if backend needs to re-arm all fds from scratch */ 775/* usually called after fork if backend needs to re-arm all fds from scratch */
536static void 776static void noinline
537fd_rearm_all (EV_P) 777fd_rearm_all (EV_P)
538{ 778{
539 int fd; 779 int fd;
540 780
541 /* this should be highly optimised to not do anything but set a flag */
542 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
543 if (anfds [fd].events) 782 if (anfds [fd].events)
544 { 783 {
545 anfds [fd].events = 0; 784 anfds [fd].events = 0;
546 fd_change (EV_A_ fd); 785 fd_change (EV_A_ fd, EV_IOFDSET | 1);
547 } 786 }
548} 787}
549 788
550/*****************************************************************************/ 789/*****************************************************************************/
551 790
552static void 791/*
792 * the heap functions want a real array index. array index 0 uis guaranteed to not
793 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
794 * the branching factor of the d-tree.
795 */
796
797/*
798 * at the moment we allow libev the luxury of two heaps,
799 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
800 * which is more cache-efficient.
801 * the difference is about 5% with 50000+ watchers.
802 */
803#if EV_USE_4HEAP
804
805#define DHEAP 4
806#define HEAP0 (DHEAP - 1) /* index of first element in heap */
807#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
808
809/* towards the root */
810void inline_speed
553upheap (WT *heap, int k) 811upheap (ANHE *heap, int k)
554{ 812{
555 WT w = heap [k]; 813 ANHE he = heap [k];
556 814
557 while (k && heap [k >> 1]->at > w->at) 815 for (;;)
558 {
559 heap [k] = heap [k >> 1];
560 ((W)heap [k])->active = k + 1;
561 k >>= 1;
562 } 816 {
817 int p = HPARENT (k);
563 818
564 heap [k] = w; 819 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
565 ((W)heap [k])->active = k + 1;
566
567}
568
569static void
570downheap (WT *heap, int N, int k)
571{
572 WT w = heap [k];
573
574 while (k < (N >> 1))
575 {
576 int j = k << 1;
577
578 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
579 ++j;
580
581 if (w->at <= heap [j]->at)
582 break; 820 break;
583 821
584 heap [k] = heap [j]; 822 heap [k] = heap [p];
585 ((W)heap [k])->active = k + 1; 823 ev_active (ANHE_w (heap [k])) = k;
586 k = j; 824 k = p;
587 } 825 }
588 826
589 heap [k] = w; 827 heap [k] = he;
590 ((W)heap [k])->active = k + 1; 828 ev_active (ANHE_w (he)) = k;
591} 829}
592 830
593inline void 831/* away from the root */
832void inline_speed
833downheap (ANHE *heap, int N, int k)
834{
835 ANHE he = heap [k];
836 ANHE *E = heap + N + HEAP0;
837
838 for (;;)
839 {
840 ev_tstamp minat;
841 ANHE *minpos;
842 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
843
844 // find minimum child
845 if (expect_true (pos + DHEAP - 1 < E))
846 {
847 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
849 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
850 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
851 }
852 else if (pos < E)
853 {
854 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
855 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else
860 break;
861
862 if (ANHE_at (he) <= minat)
863 break;
864
865 heap [k] = *minpos;
866 ev_active (ANHE_w (*minpos)) = k;
867
868 k = minpos - heap;
869 }
870
871 heap [k] = he;
872 ev_active (ANHE_w (he)) = k;
873}
874
875#else // 4HEAP
876
877#define HEAP0 1
878#define HPARENT(k) ((k) >> 1)
879
880/* towards the root */
881void inline_speed
882upheap (ANHE *heap, int k)
883{
884 ANHE he = heap [k];
885
886 for (;;)
887 {
888 int p = HPARENT (k);
889
890 /* maybe we could use a dummy element at heap [0]? */
891 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
892 break;
893
894 heap [k] = heap [p];
895 ev_active (ANHE_w (heap [k])) = k;
896 k = p;
897 }
898
899 heap [k] = he;
900 ev_active (ANHE_w (heap [k])) = k;
901}
902
903/* away from the root */
904void inline_speed
905downheap (ANHE *heap, int N, int k)
906{
907 ANHE he = heap [k];
908
909 for (;;)
910 {
911 int c = k << 1;
912
913 if (c > N)
914 break;
915
916 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
917 ? 1 : 0;
918
919 if (ANHE_at (he) <= ANHE_at (heap [c]))
920 break;
921
922 heap [k] = heap [c];
923 ev_active (ANHE_w (heap [k])) = k;
924
925 k = c;
926 }
927
928 heap [k] = he;
929 ev_active (ANHE_w (he)) = k;
930}
931#endif
932
933void inline_size
594adjustheap (WT *heap, int N, int k) 934adjustheap (ANHE *heap, int N, int k)
595{ 935{
936 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
596 upheap (heap, k); 937 upheap (heap, k);
938 else
597 downheap (heap, N, k); 939 downheap (heap, N, k);
598} 940}
599 941
600/*****************************************************************************/ 942/*****************************************************************************/
601 943
602typedef struct 944typedef struct
603{ 945{
604 WL head; 946 WL head;
605 sig_atomic_t volatile gotsig; 947 EV_ATOMIC_T gotsig;
606} ANSIG; 948} ANSIG;
607 949
608static ANSIG *signals; 950static ANSIG *signals;
609static int signalmax; 951static int signalmax;
610 952
611static int sigpipe [2]; 953static EV_ATOMIC_T gotsig;
612static sig_atomic_t volatile gotsig;
613static ev_io sigev;
614 954
615static void 955void inline_size
616signals_init (ANSIG *base, int count) 956signals_init (ANSIG *base, int count)
617{ 957{
618 while (count--) 958 while (count--)
619 { 959 {
620 base->head = 0; 960 base->head = 0;
… …
622 962
623 ++base; 963 ++base;
624 } 964 }
625} 965}
626 966
627static void 967/*****************************************************************************/
628sighandler (int signum)
629{
630#if _WIN32
631 signal (signum, sighandler);
632#endif
633 968
634 signals [signum - 1].gotsig = 1; 969void inline_speed
635
636 if (!gotsig)
637 {
638 int old_errno = errno;
639 gotsig = 1;
640 write (sigpipe [1], &signum, 1);
641 errno = old_errno;
642 }
643}
644
645void
646ev_feed_signal_event (EV_P_ int signum)
647{
648 WL w;
649
650#if EV_MULTIPLICITY
651 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
652#endif
653
654 --signum;
655
656 if (signum < 0 || signum >= signalmax)
657 return;
658
659 signals [signum].gotsig = 0;
660
661 for (w = signals [signum].head; w; w = w->next)
662 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
663}
664
665static void
666sigcb (EV_P_ ev_io *iow, int revents)
667{
668 int signum;
669
670 read (sigpipe [0], &revents, 1);
671 gotsig = 0;
672
673 for (signum = signalmax; signum--; )
674 if (signals [signum].gotsig)
675 ev_feed_signal_event (EV_A_ signum + 1);
676}
677
678static void
679fd_intern (int fd) 970fd_intern (int fd)
680{ 971{
681#ifdef _WIN32 972#ifdef _WIN32
682 int arg = 1; 973 int arg = 1;
683 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 974 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
… …
685 fcntl (fd, F_SETFD, FD_CLOEXEC); 976 fcntl (fd, F_SETFD, FD_CLOEXEC);
686 fcntl (fd, F_SETFL, O_NONBLOCK); 977 fcntl (fd, F_SETFL, O_NONBLOCK);
687#endif 978#endif
688} 979}
689 980
981static void noinline
982evpipe_init (EV_P)
983{
984 if (!ev_is_active (&pipeev))
985 {
986#if EV_USE_EVENTFD
987 if ((evfd = eventfd (0, 0)) >= 0)
988 {
989 evpipe [0] = -1;
990 fd_intern (evfd);
991 ev_io_set (&pipeev, evfd, EV_READ);
992 }
993 else
994#endif
995 {
996 while (pipe (evpipe))
997 syserr ("(libev) error creating signal/async pipe");
998
999 fd_intern (evpipe [0]);
1000 fd_intern (evpipe [1]);
1001 ev_io_set (&pipeev, evpipe [0], EV_READ);
1002 }
1003
1004 ev_io_start (EV_A_ &pipeev);
1005 ev_unref (EV_A); /* watcher should not keep loop alive */
1006 }
1007}
1008
1009void inline_size
1010evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1011{
1012 if (!*flag)
1013 {
1014 int old_errno = errno; /* save errno because write might clobber it */
1015
1016 *flag = 1;
1017
1018#if EV_USE_EVENTFD
1019 if (evfd >= 0)
1020 {
1021 uint64_t counter = 1;
1022 write (evfd, &counter, sizeof (uint64_t));
1023 }
1024 else
1025#endif
1026 write (evpipe [1], &old_errno, 1);
1027
1028 errno = old_errno;
1029 }
1030}
1031
690static void 1032static void
691siginit (EV_P) 1033pipecb (EV_P_ ev_io *iow, int revents)
692{ 1034{
693 fd_intern (sigpipe [0]); 1035#if EV_USE_EVENTFD
694 fd_intern (sigpipe [1]); 1036 if (evfd >= 0)
1037 {
1038 uint64_t counter;
1039 read (evfd, &counter, sizeof (uint64_t));
1040 }
1041 else
1042#endif
1043 {
1044 char dummy;
1045 read (evpipe [0], &dummy, 1);
1046 }
695 1047
696 ev_io_set (&sigev, sigpipe [0], EV_READ); 1048 if (gotsig && ev_is_default_loop (EV_A))
697 ev_io_start (EV_A_ &sigev); 1049 {
698 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1050 int signum;
1051 gotsig = 0;
1052
1053 for (signum = signalmax; signum--; )
1054 if (signals [signum].gotsig)
1055 ev_feed_signal_event (EV_A_ signum + 1);
1056 }
1057
1058#if EV_ASYNC_ENABLE
1059 if (gotasync)
1060 {
1061 int i;
1062 gotasync = 0;
1063
1064 for (i = asynccnt; i--; )
1065 if (asyncs [i]->sent)
1066 {
1067 asyncs [i]->sent = 0;
1068 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1069 }
1070 }
1071#endif
699} 1072}
700 1073
701/*****************************************************************************/ 1074/*****************************************************************************/
702 1075
1076static void
1077ev_sighandler (int signum)
1078{
1079#if EV_MULTIPLICITY
1080 struct ev_loop *loop = &default_loop_struct;
1081#endif
1082
1083#if _WIN32
1084 signal (signum, ev_sighandler);
1085#endif
1086
1087 signals [signum - 1].gotsig = 1;
1088 evpipe_write (EV_A_ &gotsig);
1089}
1090
1091void noinline
1092ev_feed_signal_event (EV_P_ int signum)
1093{
1094 WL w;
1095
1096#if EV_MULTIPLICITY
1097 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1098#endif
1099
1100 --signum;
1101
1102 if (signum < 0 || signum >= signalmax)
1103 return;
1104
1105 signals [signum].gotsig = 0;
1106
1107 for (w = signals [signum].head; w; w = w->next)
1108 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1109}
1110
1111/*****************************************************************************/
1112
703static ev_child *childs [PID_HASHSIZE]; 1113static WL childs [EV_PID_HASHSIZE];
704 1114
705#ifndef _WIN32 1115#ifndef _WIN32
706 1116
707static ev_signal childev; 1117static ev_signal childev;
1118
1119#ifndef WIFCONTINUED
1120# define WIFCONTINUED(status) 0
1121#endif
1122
1123void inline_speed
1124child_reap (EV_P_ int chain, int pid, int status)
1125{
1126 ev_child *w;
1127 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1128
1129 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1130 {
1131 if ((w->pid == pid || !w->pid)
1132 && (!traced || (w->flags & 1)))
1133 {
1134 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1135 w->rpid = pid;
1136 w->rstatus = status;
1137 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1138 }
1139 }
1140}
708 1141
709#ifndef WCONTINUED 1142#ifndef WCONTINUED
710# define WCONTINUED 0 1143# define WCONTINUED 0
711#endif 1144#endif
712 1145
713static void 1146static void
714child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
715{
716 ev_child *w;
717
718 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
719 if (w->pid == pid || !w->pid)
720 {
721 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
722 w->rpid = pid;
723 w->rstatus = status;
724 ev_feed_event (EV_A_ (W)w, EV_CHILD);
725 }
726}
727
728static void
729childcb (EV_P_ ev_signal *sw, int revents) 1147childcb (EV_P_ ev_signal *sw, int revents)
730{ 1148{
731 int pid, status; 1149 int pid, status;
732 1150
1151 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
733 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1152 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
734 { 1153 if (!WCONTINUED
1154 || errno != EINVAL
1155 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1156 return;
1157
735 /* make sure we are called again until all childs have been reaped */ 1158 /* make sure we are called again until all children have been reaped */
736 /* we need to do it this way so that the callback gets called before we continue */ 1159 /* we need to do it this way so that the callback gets called before we continue */
737 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1160 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
738 1161
739 child_reap (EV_A_ sw, pid, pid, status); 1162 child_reap (EV_A_ pid, pid, status);
1163 if (EV_PID_HASHSIZE > 1)
740 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1164 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
741 }
742} 1165}
743 1166
744#endif 1167#endif
745 1168
746/*****************************************************************************/ 1169/*****************************************************************************/
… …
772{ 1195{
773 return EV_VERSION_MINOR; 1196 return EV_VERSION_MINOR;
774} 1197}
775 1198
776/* return true if we are running with elevated privileges and should ignore env variables */ 1199/* return true if we are running with elevated privileges and should ignore env variables */
777static int 1200int inline_size
778enable_secure (void) 1201enable_secure (void)
779{ 1202{
780#ifdef _WIN32 1203#ifdef _WIN32
781 return 0; 1204 return 0;
782#else 1205#else
… …
818} 1241}
819 1242
820unsigned int 1243unsigned int
821ev_embeddable_backends (void) 1244ev_embeddable_backends (void)
822{ 1245{
823 return EVBACKEND_EPOLL 1246 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
824 | EVBACKEND_KQUEUE 1247
825 | EVBACKEND_PORT; 1248 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1249 /* please fix it and tell me how to detect the fix */
1250 flags &= ~EVBACKEND_EPOLL;
1251
1252 return flags;
826} 1253}
827 1254
828unsigned int 1255unsigned int
829ev_backend (EV_P) 1256ev_backend (EV_P)
830{ 1257{
831 return backend; 1258 return backend;
832} 1259}
833 1260
834static void 1261unsigned int
1262ev_loop_count (EV_P)
1263{
1264 return loop_count;
1265}
1266
1267void
1268ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1269{
1270 io_blocktime = interval;
1271}
1272
1273void
1274ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1275{
1276 timeout_blocktime = interval;
1277}
1278
1279static void noinline
835loop_init (EV_P_ unsigned int flags) 1280loop_init (EV_P_ unsigned int flags)
836{ 1281{
837 if (!backend) 1282 if (!backend)
838 { 1283 {
839#if EV_USE_MONOTONIC 1284#if EV_USE_MONOTONIC
… …
842 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1287 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
843 have_monotonic = 1; 1288 have_monotonic = 1;
844 } 1289 }
845#endif 1290#endif
846 1291
847 ev_rt_now = ev_time (); 1292 ev_rt_now = ev_time ();
848 mn_now = get_clock (); 1293 mn_now = get_clock ();
849 now_floor = mn_now; 1294 now_floor = mn_now;
850 rtmn_diff = ev_rt_now - mn_now; 1295 rtmn_diff = ev_rt_now - mn_now;
1296
1297 io_blocktime = 0.;
1298 timeout_blocktime = 0.;
1299 backend = 0;
1300 backend_fd = -1;
1301 gotasync = 0;
1302#if EV_USE_INOTIFY
1303 fs_fd = -2;
1304#endif
1305
1306 /* pid check not overridable via env */
1307#ifndef _WIN32
1308 if (flags & EVFLAG_FORKCHECK)
1309 curpid = getpid ();
1310#endif
851 1311
852 if (!(flags & EVFLAG_NOENV) 1312 if (!(flags & EVFLAG_NOENV)
853 && !enable_secure () 1313 && !enable_secure ()
854 && getenv ("LIBEV_FLAGS")) 1314 && getenv ("LIBEV_FLAGS"))
855 flags = atoi (getenv ("LIBEV_FLAGS")); 1315 flags = atoi (getenv ("LIBEV_FLAGS"));
856 1316
857 if (!(flags & 0x0000ffffUL)) 1317 if (!(flags & 0x0000ffffU))
858 flags |= ev_recommended_backends (); 1318 flags |= ev_recommended_backends ();
859 1319
860 backend = 0;
861#if EV_USE_PORT 1320#if EV_USE_PORT
862 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1321 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
863#endif 1322#endif
864#if EV_USE_KQUEUE 1323#if EV_USE_KQUEUE
865 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1324 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
872#endif 1331#endif
873#if EV_USE_SELECT 1332#if EV_USE_SELECT
874 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1333 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
875#endif 1334#endif
876 1335
877 ev_init (&sigev, sigcb); 1336 ev_init (&pipeev, pipecb);
878 ev_set_priority (&sigev, EV_MAXPRI); 1337 ev_set_priority (&pipeev, EV_MAXPRI);
879 } 1338 }
880} 1339}
881 1340
882static void 1341static void noinline
883loop_destroy (EV_P) 1342loop_destroy (EV_P)
884{ 1343{
885 int i; 1344 int i;
1345
1346 if (ev_is_active (&pipeev))
1347 {
1348 ev_ref (EV_A); /* signal watcher */
1349 ev_io_stop (EV_A_ &pipeev);
1350
1351#if EV_USE_EVENTFD
1352 if (evfd >= 0)
1353 close (evfd);
1354#endif
1355
1356 if (evpipe [0] >= 0)
1357 {
1358 close (evpipe [0]);
1359 close (evpipe [1]);
1360 }
1361 }
1362
1363#if EV_USE_INOTIFY
1364 if (fs_fd >= 0)
1365 close (fs_fd);
1366#endif
1367
1368 if (backend_fd >= 0)
1369 close (backend_fd);
886 1370
887#if EV_USE_PORT 1371#if EV_USE_PORT
888 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1372 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
889#endif 1373#endif
890#if EV_USE_KQUEUE 1374#if EV_USE_KQUEUE
… …
899#if EV_USE_SELECT 1383#if EV_USE_SELECT
900 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1384 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
901#endif 1385#endif
902 1386
903 for (i = NUMPRI; i--; ) 1387 for (i = NUMPRI; i--; )
1388 {
904 array_free (pending, [i]); 1389 array_free (pending, [i]);
1390#if EV_IDLE_ENABLE
1391 array_free (idle, [i]);
1392#endif
1393 }
1394
1395 ev_free (anfds); anfdmax = 0;
905 1396
906 /* have to use the microsoft-never-gets-it-right macro */ 1397 /* have to use the microsoft-never-gets-it-right macro */
907 array_free (fdchange, EMPTY0); 1398 array_free (fdchange, EMPTY);
908 array_free (timer, EMPTY0); 1399 array_free (timer, EMPTY);
909#if EV_PERIODICS 1400#if EV_PERIODIC_ENABLE
910 array_free (periodic, EMPTY0); 1401 array_free (periodic, EMPTY);
911#endif 1402#endif
1403#if EV_FORK_ENABLE
912 array_free (idle, EMPTY0); 1404 array_free (fork, EMPTY);
1405#endif
913 array_free (prepare, EMPTY0); 1406 array_free (prepare, EMPTY);
914 array_free (check, EMPTY0); 1407 array_free (check, EMPTY);
1408#if EV_ASYNC_ENABLE
1409 array_free (async, EMPTY);
1410#endif
915 1411
916 backend = 0; 1412 backend = 0;
917} 1413}
918 1414
919static void 1415#if EV_USE_INOTIFY
1416void inline_size infy_fork (EV_P);
1417#endif
1418
1419void inline_size
920loop_fork (EV_P) 1420loop_fork (EV_P)
921{ 1421{
922#if EV_USE_PORT 1422#if EV_USE_PORT
923 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1423 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
924#endif 1424#endif
… …
926 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1426 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
927#endif 1427#endif
928#if EV_USE_EPOLL 1428#if EV_USE_EPOLL
929 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1429 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
930#endif 1430#endif
1431#if EV_USE_INOTIFY
1432 infy_fork (EV_A);
1433#endif
931 1434
932 if (ev_is_active (&sigev)) 1435 if (ev_is_active (&pipeev))
933 { 1436 {
934 /* default loop */ 1437 /* this "locks" the handlers against writing to the pipe */
1438 /* while we modify the fd vars */
1439 gotsig = 1;
1440#if EV_ASYNC_ENABLE
1441 gotasync = 1;
1442#endif
935 1443
936 ev_ref (EV_A); 1444 ev_ref (EV_A);
937 ev_io_stop (EV_A_ &sigev); 1445 ev_io_stop (EV_A_ &pipeev);
1446
1447#if EV_USE_EVENTFD
1448 if (evfd >= 0)
1449 close (evfd);
1450#endif
1451
1452 if (evpipe [0] >= 0)
1453 {
938 close (sigpipe [0]); 1454 close (evpipe [0]);
939 close (sigpipe [1]); 1455 close (evpipe [1]);
1456 }
940 1457
941 while (pipe (sigpipe))
942 syserr ("(libev) error creating pipe");
943
944 siginit (EV_A); 1458 evpipe_init (EV_A);
1459 /* now iterate over everything, in case we missed something */
1460 pipecb (EV_A_ &pipeev, EV_READ);
945 } 1461 }
946 1462
947 postfork = 0; 1463 postfork = 0;
948} 1464}
949 1465
… …
971} 1487}
972 1488
973void 1489void
974ev_loop_fork (EV_P) 1490ev_loop_fork (EV_P)
975{ 1491{
976 postfork = 1; 1492 postfork = 1; /* must be in line with ev_default_fork */
977} 1493}
978
979#endif 1494#endif
980 1495
981#if EV_MULTIPLICITY 1496#if EV_MULTIPLICITY
982struct ev_loop * 1497struct ev_loop *
983ev_default_loop_init (unsigned int flags) 1498ev_default_loop_init (unsigned int flags)
984#else 1499#else
985int 1500int
986ev_default_loop (unsigned int flags) 1501ev_default_loop (unsigned int flags)
987#endif 1502#endif
988{ 1503{
989 if (sigpipe [0] == sigpipe [1])
990 if (pipe (sigpipe))
991 return 0;
992
993 if (!ev_default_loop_ptr) 1504 if (!ev_default_loop_ptr)
994 { 1505 {
995#if EV_MULTIPLICITY 1506#if EV_MULTIPLICITY
996 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1507 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
997#else 1508#else
… …
1000 1511
1001 loop_init (EV_A_ flags); 1512 loop_init (EV_A_ flags);
1002 1513
1003 if (ev_backend (EV_A)) 1514 if (ev_backend (EV_A))
1004 { 1515 {
1005 siginit (EV_A);
1006
1007#ifndef _WIN32 1516#ifndef _WIN32
1008 ev_signal_init (&childev, childcb, SIGCHLD); 1517 ev_signal_init (&childev, childcb, SIGCHLD);
1009 ev_set_priority (&childev, EV_MAXPRI); 1518 ev_set_priority (&childev, EV_MAXPRI);
1010 ev_signal_start (EV_A_ &childev); 1519 ev_signal_start (EV_A_ &childev);
1011 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1520 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1028#ifndef _WIN32 1537#ifndef _WIN32
1029 ev_ref (EV_A); /* child watcher */ 1538 ev_ref (EV_A); /* child watcher */
1030 ev_signal_stop (EV_A_ &childev); 1539 ev_signal_stop (EV_A_ &childev);
1031#endif 1540#endif
1032 1541
1033 ev_ref (EV_A); /* signal watcher */
1034 ev_io_stop (EV_A_ &sigev);
1035
1036 close (sigpipe [0]); sigpipe [0] = 0;
1037 close (sigpipe [1]); sigpipe [1] = 0;
1038
1039 loop_destroy (EV_A); 1542 loop_destroy (EV_A);
1040} 1543}
1041 1544
1042void 1545void
1043ev_default_fork (void) 1546ev_default_fork (void)
… …
1045#if EV_MULTIPLICITY 1548#if EV_MULTIPLICITY
1046 struct ev_loop *loop = ev_default_loop_ptr; 1549 struct ev_loop *loop = ev_default_loop_ptr;
1047#endif 1550#endif
1048 1551
1049 if (backend) 1552 if (backend)
1050 postfork = 1; 1553 postfork = 1; /* must be in line with ev_loop_fork */
1051} 1554}
1052 1555
1053/*****************************************************************************/ 1556/*****************************************************************************/
1054 1557
1055static int 1558void
1056any_pending (EV_P) 1559ev_invoke (EV_P_ void *w, int revents)
1057{ 1560{
1058 int pri; 1561 EV_CB_INVOKE ((W)w, revents);
1059
1060 for (pri = NUMPRI; pri--; )
1061 if (pendingcnt [pri])
1062 return 1;
1063
1064 return 0;
1065} 1562}
1066 1563
1067inline void 1564void inline_speed
1068call_pending (EV_P) 1565call_pending (EV_P)
1069{ 1566{
1070 int pri; 1567 int pri;
1071 1568
1072 for (pri = NUMPRI; pri--; ) 1569 for (pri = NUMPRI; pri--; )
… …
1074 { 1571 {
1075 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1572 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1076 1573
1077 if (expect_true (p->w)) 1574 if (expect_true (p->w))
1078 { 1575 {
1079 assert (("non-pending watcher on pending list", p->w->pending)); 1576 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1080 1577
1081 p->w->pending = 0; 1578 p->w->pending = 0;
1082 EV_CB_INVOKE (p->w, p->events); 1579 EV_CB_INVOKE (p->w, p->events);
1083 } 1580 }
1084 } 1581 }
1085} 1582}
1086 1583
1087inline void 1584#if EV_IDLE_ENABLE
1585void inline_size
1586idle_reify (EV_P)
1587{
1588 if (expect_false (idleall))
1589 {
1590 int pri;
1591
1592 for (pri = NUMPRI; pri--; )
1593 {
1594 if (pendingcnt [pri])
1595 break;
1596
1597 if (idlecnt [pri])
1598 {
1599 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1600 break;
1601 }
1602 }
1603 }
1604}
1605#endif
1606
1607void inline_size
1088timers_reify (EV_P) 1608timers_reify (EV_P)
1089{ 1609{
1090 while (timercnt && ((WT)timers [0])->at <= mn_now) 1610 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1091 { 1611 {
1092 ev_timer *w = timers [0]; 1612 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1093 1613
1094 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1614 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1095 1615
1096 /* first reschedule or stop timer */ 1616 /* first reschedule or stop timer */
1097 if (w->repeat) 1617 if (w->repeat)
1098 { 1618 {
1619 ev_at (w) += w->repeat;
1620 if (ev_at (w) < mn_now)
1621 ev_at (w) = mn_now;
1622
1099 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1623 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1100 1624
1101 ((WT)w)->at += w->repeat; 1625 ANHE_at_set (timers [HEAP0]);
1102 if (((WT)w)->at < mn_now)
1103 ((WT)w)->at = mn_now;
1104
1105 downheap ((WT *)timers, timercnt, 0); 1626 downheap (timers, timercnt, HEAP0);
1106 } 1627 }
1107 else 1628 else
1108 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1629 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1109 1630
1110 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1631 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1111 } 1632 }
1112} 1633}
1113 1634
1114#if EV_PERIODICS 1635#if EV_PERIODIC_ENABLE
1115inline void 1636void inline_size
1116periodics_reify (EV_P) 1637periodics_reify (EV_P)
1117{ 1638{
1118 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1639 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1119 { 1640 {
1120 ev_periodic *w = periodics [0]; 1641 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1121 1642
1122 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1643 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1123 1644
1124 /* first reschedule or stop timer */ 1645 /* first reschedule or stop timer */
1125 if (w->reschedule_cb) 1646 if (w->reschedule_cb)
1126 { 1647 {
1127 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1648 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1649
1128 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1650 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1651
1652 ANHE_at_set (periodics [HEAP0]);
1129 downheap ((WT *)periodics, periodiccnt, 0); 1653 downheap (periodics, periodiccnt, HEAP0);
1130 } 1654 }
1131 else if (w->interval) 1655 else if (w->interval)
1132 { 1656 {
1133 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1657 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1134 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1658 /* if next trigger time is not sufficiently in the future, put it there */
1659 /* this might happen because of floating point inexactness */
1660 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1661 {
1662 ev_at (w) += w->interval;
1663
1664 /* if interval is unreasonably low we might still have a time in the past */
1665 /* so correct this. this will make the periodic very inexact, but the user */
1666 /* has effectively asked to get triggered more often than possible */
1667 if (ev_at (w) < ev_rt_now)
1668 ev_at (w) = ev_rt_now;
1669 }
1670
1671 ANHE_at_set (periodics [HEAP0]);
1135 downheap ((WT *)periodics, periodiccnt, 0); 1672 downheap (periodics, periodiccnt, HEAP0);
1136 } 1673 }
1137 else 1674 else
1138 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1675 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1139 1676
1140 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1677 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1141 } 1678 }
1142} 1679}
1143 1680
1144static void 1681static void noinline
1145periodics_reschedule (EV_P) 1682periodics_reschedule (EV_P)
1146{ 1683{
1147 int i; 1684 int i;
1148 1685
1149 /* adjust periodics after time jump */ 1686 /* adjust periodics after time jump */
1687 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1688 {
1689 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1690
1691 if (w->reschedule_cb)
1692 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1693 else if (w->interval)
1694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1695
1696 ANHE_at_set (periodics [i]);
1697 }
1698
1699 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
1700 /* also, this is easy and corretc for both 2-heaps and 4-heaps */
1150 for (i = 0; i < periodiccnt; ++i) 1701 for (i = 0; i < periodiccnt; ++i)
1151 { 1702 upheap (periodics, i + HEAP0);
1152 ev_periodic *w = periodics [i]; 1703}
1704#endif
1153 1705
1154 if (w->reschedule_cb) 1706void inline_speed
1155 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1707time_update (EV_P_ ev_tstamp max_block)
1156 else if (w->interval) 1708{
1157 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1709 int i;
1710
1711#if EV_USE_MONOTONIC
1712 if (expect_true (have_monotonic))
1158 } 1713 {
1714 ev_tstamp odiff = rtmn_diff;
1159 1715
1160 /* now rebuild the heap */
1161 for (i = periodiccnt >> 1; i--; )
1162 downheap ((WT *)periodics, periodiccnt, i);
1163}
1164#endif
1165
1166inline int
1167time_update_monotonic (EV_P)
1168{
1169 mn_now = get_clock (); 1716 mn_now = get_clock ();
1170 1717
1718 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1719 /* interpolate in the meantime */
1171 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1720 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1172 { 1721 {
1173 ev_rt_now = rtmn_diff + mn_now; 1722 ev_rt_now = rtmn_diff + mn_now;
1174 return 0; 1723 return;
1175 } 1724 }
1176 else 1725
1177 {
1178 now_floor = mn_now; 1726 now_floor = mn_now;
1179 ev_rt_now = ev_time (); 1727 ev_rt_now = ev_time ();
1180 return 1;
1181 }
1182}
1183 1728
1184inline void 1729 /* loop a few times, before making important decisions.
1185time_update (EV_P) 1730 * on the choice of "4": one iteration isn't enough,
1186{ 1731 * in case we get preempted during the calls to
1187 int i; 1732 * ev_time and get_clock. a second call is almost guaranteed
1188 1733 * to succeed in that case, though. and looping a few more times
1189#if EV_USE_MONOTONIC 1734 * doesn't hurt either as we only do this on time-jumps or
1190 if (expect_true (have_monotonic)) 1735 * in the unlikely event of having been preempted here.
1191 { 1736 */
1192 if (time_update_monotonic (EV_A)) 1737 for (i = 4; --i; )
1193 { 1738 {
1194 ev_tstamp odiff = rtmn_diff; 1739 rtmn_diff = ev_rt_now - mn_now;
1195 1740
1196 /* loop a few times, before making important decisions. 1741 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1197 * on the choice of "4": one iteration isn't enough, 1742 return; /* all is well */
1198 * in case we get preempted during the calls to 1743
1199 * ev_time and get_clock. a second call is almost guarenteed 1744 ev_rt_now = ev_time ();
1200 * to succeed in that case, though. and looping a few more times 1745 mn_now = get_clock ();
1201 * doesn't hurt either as we only do this on time-jumps or 1746 now_floor = mn_now;
1202 * in the unlikely event of getting preempted here. 1747 }
1203 */ 1748
1204 for (i = 4; --i; ) 1749# if EV_PERIODIC_ENABLE
1750 periodics_reschedule (EV_A);
1751# endif
1752 /* no timer adjustment, as the monotonic clock doesn't jump */
1753 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1754 }
1755 else
1756#endif
1757 {
1758 ev_rt_now = ev_time ();
1759
1760 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1761 {
1762#if EV_PERIODIC_ENABLE
1763 periodics_reschedule (EV_A);
1764#endif
1765 /* adjust timers. this is easy, as the offset is the same for all of them */
1766 for (i = 0; i < timercnt; ++i)
1205 { 1767 {
1206 rtmn_diff = ev_rt_now - mn_now; 1768 ANHE *he = timers + i + HEAP0;
1207 1769 ANHE_w (*he)->at += ev_rt_now - mn_now;
1208 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1770 ANHE_at_set (*he);
1209 return; /* all is well */
1210
1211 ev_rt_now = ev_time ();
1212 mn_now = get_clock ();
1213 now_floor = mn_now;
1214 } 1771 }
1215
1216# if EV_PERIODICS
1217 periodics_reschedule (EV_A);
1218# endif
1219 /* no timer adjustment, as the monotonic clock doesn't jump */
1220 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1221 } 1772 }
1222 }
1223 else
1224#endif
1225 {
1226 ev_rt_now = ev_time ();
1227
1228 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1229 {
1230#if EV_PERIODICS
1231 periodics_reschedule (EV_A);
1232#endif
1233
1234 /* adjust timers. this is easy, as the offset is the same for all */
1235 for (i = 0; i < timercnt; ++i)
1236 ((WT)timers [i])->at += ev_rt_now - mn_now;
1237 }
1238 1773
1239 mn_now = ev_rt_now; 1774 mn_now = ev_rt_now;
1240 } 1775 }
1241} 1776}
1242 1777
… …
1255static int loop_done; 1790static int loop_done;
1256 1791
1257void 1792void
1258ev_loop (EV_P_ int flags) 1793ev_loop (EV_P_ int flags)
1259{ 1794{
1260 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1795 loop_done = EVUNLOOP_CANCEL;
1261 ? EVUNLOOP_ONE
1262 : EVUNLOOP_CANCEL;
1263 1796
1264 while (activecnt) 1797 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1798
1799 do
1265 { 1800 {
1801#ifndef _WIN32
1802 if (expect_false (curpid)) /* penalise the forking check even more */
1803 if (expect_false (getpid () != curpid))
1804 {
1805 curpid = getpid ();
1806 postfork = 1;
1807 }
1808#endif
1809
1810#if EV_FORK_ENABLE
1811 /* we might have forked, so queue fork handlers */
1812 if (expect_false (postfork))
1813 if (forkcnt)
1814 {
1815 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1816 call_pending (EV_A);
1817 }
1818#endif
1819
1266 /* queue check watchers (and execute them) */ 1820 /* queue prepare watchers (and execute them) */
1267 if (expect_false (preparecnt)) 1821 if (expect_false (preparecnt))
1268 { 1822 {
1269 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1823 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1270 call_pending (EV_A); 1824 call_pending (EV_A);
1271 } 1825 }
1272 1826
1827 if (expect_false (!activecnt))
1828 break;
1829
1273 /* we might have forked, so reify kernel state if necessary */ 1830 /* we might have forked, so reify kernel state if necessary */
1274 if (expect_false (postfork)) 1831 if (expect_false (postfork))
1275 loop_fork (EV_A); 1832 loop_fork (EV_A);
1276 1833
1277 /* update fd-related kernel structures */ 1834 /* update fd-related kernel structures */
1278 fd_reify (EV_A); 1835 fd_reify (EV_A);
1279 1836
1280 /* calculate blocking time */ 1837 /* calculate blocking time */
1281 { 1838 {
1282 double block; 1839 ev_tstamp waittime = 0.;
1840 ev_tstamp sleeptime = 0.;
1283 1841
1284 if (flags & EVLOOP_NONBLOCK || idlecnt) 1842 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1285 block = 0.; /* do not block at all */
1286 else
1287 { 1843 {
1288 /* update time to cancel out callback processing overhead */ 1844 /* update time to cancel out callback processing overhead */
1289#if EV_USE_MONOTONIC
1290 if (expect_true (have_monotonic))
1291 time_update_monotonic (EV_A); 1845 time_update (EV_A_ 1e100);
1292 else
1293#endif
1294 {
1295 ev_rt_now = ev_time ();
1296 mn_now = ev_rt_now;
1297 }
1298 1846
1299 block = MAX_BLOCKTIME; 1847 waittime = MAX_BLOCKTIME;
1300 1848
1301 if (timercnt) 1849 if (timercnt)
1302 { 1850 {
1303 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1851 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1304 if (block > to) block = to; 1852 if (waittime > to) waittime = to;
1305 } 1853 }
1306 1854
1307#if EV_PERIODICS 1855#if EV_PERIODIC_ENABLE
1308 if (periodiccnt) 1856 if (periodiccnt)
1309 { 1857 {
1310 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1858 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1311 if (block > to) block = to; 1859 if (waittime > to) waittime = to;
1312 } 1860 }
1313#endif 1861#endif
1314 1862
1315 if (expect_false (block < 0.)) block = 0.; 1863 if (expect_false (waittime < timeout_blocktime))
1864 waittime = timeout_blocktime;
1865
1866 sleeptime = waittime - backend_fudge;
1867
1868 if (expect_true (sleeptime > io_blocktime))
1869 sleeptime = io_blocktime;
1870
1871 if (sleeptime)
1872 {
1873 ev_sleep (sleeptime);
1874 waittime -= sleeptime;
1875 }
1316 } 1876 }
1317 1877
1878 ++loop_count;
1318 backend_poll (EV_A_ block); 1879 backend_poll (EV_A_ waittime);
1880
1881 /* update ev_rt_now, do magic */
1882 time_update (EV_A_ waittime + sleeptime);
1319 } 1883 }
1320
1321 /* update ev_rt_now, do magic */
1322 time_update (EV_A);
1323 1884
1324 /* queue pending timers and reschedule them */ 1885 /* queue pending timers and reschedule them */
1325 timers_reify (EV_A); /* relative timers called last */ 1886 timers_reify (EV_A); /* relative timers called last */
1326#if EV_PERIODICS 1887#if EV_PERIODIC_ENABLE
1327 periodics_reify (EV_A); /* absolute timers called first */ 1888 periodics_reify (EV_A); /* absolute timers called first */
1328#endif 1889#endif
1329 1890
1891#if EV_IDLE_ENABLE
1330 /* queue idle watchers unless other events are pending */ 1892 /* queue idle watchers unless other events are pending */
1331 if (idlecnt && !any_pending (EV_A)) 1893 idle_reify (EV_A);
1332 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1894#endif
1333 1895
1334 /* queue check watchers, to be executed first */ 1896 /* queue check watchers, to be executed first */
1335 if (expect_false (checkcnt)) 1897 if (expect_false (checkcnt))
1336 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1898 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1337 1899
1338 call_pending (EV_A); 1900 call_pending (EV_A);
1339
1340 if (expect_false (loop_done))
1341 break;
1342 } 1901 }
1902 while (expect_true (
1903 activecnt
1904 && !loop_done
1905 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1906 ));
1343 1907
1344 if (loop_done == EVUNLOOP_ONE) 1908 if (loop_done == EVUNLOOP_ONE)
1345 loop_done = EVUNLOOP_CANCEL; 1909 loop_done = EVUNLOOP_CANCEL;
1346} 1910}
1347 1911
… …
1351 loop_done = how; 1915 loop_done = how;
1352} 1916}
1353 1917
1354/*****************************************************************************/ 1918/*****************************************************************************/
1355 1919
1356inline void 1920void inline_size
1357wlist_add (WL *head, WL elem) 1921wlist_add (WL *head, WL elem)
1358{ 1922{
1359 elem->next = *head; 1923 elem->next = *head;
1360 *head = elem; 1924 *head = elem;
1361} 1925}
1362 1926
1363inline void 1927void inline_size
1364wlist_del (WL *head, WL elem) 1928wlist_del (WL *head, WL elem)
1365{ 1929{
1366 while (*head) 1930 while (*head)
1367 { 1931 {
1368 if (*head == elem) 1932 if (*head == elem)
… …
1373 1937
1374 head = &(*head)->next; 1938 head = &(*head)->next;
1375 } 1939 }
1376} 1940}
1377 1941
1378inline void 1942void inline_speed
1379ev_clear_pending (EV_P_ W w) 1943clear_pending (EV_P_ W w)
1380{ 1944{
1381 if (w->pending) 1945 if (w->pending)
1382 { 1946 {
1383 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1947 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1384 w->pending = 0; 1948 w->pending = 0;
1385 } 1949 }
1386} 1950}
1387 1951
1388inline void 1952int
1953ev_clear_pending (EV_P_ void *w)
1954{
1955 W w_ = (W)w;
1956 int pending = w_->pending;
1957
1958 if (expect_true (pending))
1959 {
1960 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1961 w_->pending = 0;
1962 p->w = 0;
1963 return p->events;
1964 }
1965 else
1966 return 0;
1967}
1968
1969void inline_size
1970pri_adjust (EV_P_ W w)
1971{
1972 int pri = w->priority;
1973 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1974 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1975 w->priority = pri;
1976}
1977
1978void inline_speed
1389ev_start (EV_P_ W w, int active) 1979ev_start (EV_P_ W w, int active)
1390{ 1980{
1391 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1981 pri_adjust (EV_A_ w);
1392 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1393
1394 w->active = active; 1982 w->active = active;
1395 ev_ref (EV_A); 1983 ev_ref (EV_A);
1396} 1984}
1397 1985
1398inline void 1986void inline_size
1399ev_stop (EV_P_ W w) 1987ev_stop (EV_P_ W w)
1400{ 1988{
1401 ev_unref (EV_A); 1989 ev_unref (EV_A);
1402 w->active = 0; 1990 w->active = 0;
1403} 1991}
1404 1992
1405/*****************************************************************************/ 1993/*****************************************************************************/
1406 1994
1407void 1995void noinline
1408ev_io_start (EV_P_ ev_io *w) 1996ev_io_start (EV_P_ ev_io *w)
1409{ 1997{
1410 int fd = w->fd; 1998 int fd = w->fd;
1411 1999
1412 if (expect_false (ev_is_active (w))) 2000 if (expect_false (ev_is_active (w)))
… …
1414 2002
1415 assert (("ev_io_start called with negative fd", fd >= 0)); 2003 assert (("ev_io_start called with negative fd", fd >= 0));
1416 2004
1417 ev_start (EV_A_ (W)w, 1); 2005 ev_start (EV_A_ (W)w, 1);
1418 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2006 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1419 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2007 wlist_add (&anfds[fd].head, (WL)w);
1420 2008
1421 fd_change (EV_A_ fd); 2009 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2010 w->events &= ~EV_IOFDSET;
1422} 2011}
1423 2012
1424void 2013void noinline
1425ev_io_stop (EV_P_ ev_io *w) 2014ev_io_stop (EV_P_ ev_io *w)
1426{ 2015{
1427 ev_clear_pending (EV_A_ (W)w); 2016 clear_pending (EV_A_ (W)w);
1428 if (expect_false (!ev_is_active (w))) 2017 if (expect_false (!ev_is_active (w)))
1429 return; 2018 return;
1430 2019
1431 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2020 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1432 2021
1433 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2022 wlist_del (&anfds[w->fd].head, (WL)w);
1434 ev_stop (EV_A_ (W)w); 2023 ev_stop (EV_A_ (W)w);
1435 2024
1436 fd_change (EV_A_ w->fd); 2025 fd_change (EV_A_ w->fd, 1);
1437} 2026}
1438 2027
1439void 2028void noinline
1440ev_timer_start (EV_P_ ev_timer *w) 2029ev_timer_start (EV_P_ ev_timer *w)
1441{ 2030{
1442 if (expect_false (ev_is_active (w))) 2031 if (expect_false (ev_is_active (w)))
1443 return; 2032 return;
1444 2033
1445 ((WT)w)->at += mn_now; 2034 ev_at (w) += mn_now;
1446 2035
1447 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2036 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1448 2037
1449 ev_start (EV_A_ (W)w, ++timercnt); 2038 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1450 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2039 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1451 timers [timercnt - 1] = w; 2040 ANHE_w (timers [ev_active (w)]) = (WT)w;
1452 upheap ((WT *)timers, timercnt - 1); 2041 ANHE_at_set (timers [ev_active (w)]);
2042 upheap (timers, ev_active (w));
1453 2043
1454 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2044 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1455} 2045}
1456 2046
1457void 2047void noinline
1458ev_timer_stop (EV_P_ ev_timer *w) 2048ev_timer_stop (EV_P_ ev_timer *w)
1459{ 2049{
1460 ev_clear_pending (EV_A_ (W)w); 2050 clear_pending (EV_A_ (W)w);
1461 if (expect_false (!ev_is_active (w))) 2051 if (expect_false (!ev_is_active (w)))
1462 return; 2052 return;
1463 2053
2054 {
2055 int active = ev_active (w);
2056
1464 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2057 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1465 2058
1466 if (expect_true (((W)w)->active < timercnt--)) 2059 if (expect_true (active < timercnt + HEAP0 - 1))
1467 { 2060 {
1468 timers [((W)w)->active - 1] = timers [timercnt]; 2061 timers [active] = timers [timercnt + HEAP0 - 1];
1469 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2062 adjustheap (timers, timercnt, active);
1470 } 2063 }
1471 2064
1472 ((WT)w)->at -= mn_now; 2065 --timercnt;
2066 }
2067
2068 ev_at (w) -= mn_now;
1473 2069
1474 ev_stop (EV_A_ (W)w); 2070 ev_stop (EV_A_ (W)w);
1475} 2071}
1476 2072
1477void 2073void noinline
1478ev_timer_again (EV_P_ ev_timer *w) 2074ev_timer_again (EV_P_ ev_timer *w)
1479{ 2075{
1480 if (ev_is_active (w)) 2076 if (ev_is_active (w))
1481 { 2077 {
1482 if (w->repeat) 2078 if (w->repeat)
1483 { 2079 {
1484 ((WT)w)->at = mn_now + w->repeat; 2080 ev_at (w) = mn_now + w->repeat;
2081 ANHE_at_set (timers [ev_active (w)]);
1485 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2082 adjustheap (timers, timercnt, ev_active (w));
1486 } 2083 }
1487 else 2084 else
1488 ev_timer_stop (EV_A_ w); 2085 ev_timer_stop (EV_A_ w);
1489 } 2086 }
1490 else if (w->repeat) 2087 else if (w->repeat)
1491 { 2088 {
1492 w->at = w->repeat; 2089 ev_at (w) = w->repeat;
1493 ev_timer_start (EV_A_ w); 2090 ev_timer_start (EV_A_ w);
1494 } 2091 }
1495} 2092}
1496 2093
1497#if EV_PERIODICS 2094#if EV_PERIODIC_ENABLE
1498void 2095void noinline
1499ev_periodic_start (EV_P_ ev_periodic *w) 2096ev_periodic_start (EV_P_ ev_periodic *w)
1500{ 2097{
1501 if (expect_false (ev_is_active (w))) 2098 if (expect_false (ev_is_active (w)))
1502 return; 2099 return;
1503 2100
1504 if (w->reschedule_cb) 2101 if (w->reschedule_cb)
1505 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2102 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1506 else if (w->interval) 2103 else if (w->interval)
1507 { 2104 {
1508 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2105 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1509 /* this formula differs from the one in periodic_reify because we do not always round up */ 2106 /* this formula differs from the one in periodic_reify because we do not always round up */
1510 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2107 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 } 2108 }
2109 else
2110 ev_at (w) = w->offset;
1512 2111
1513 ev_start (EV_A_ (W)w, ++periodiccnt); 2112 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1514 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2113 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1515 periodics [periodiccnt - 1] = w; 2114 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1516 upheap ((WT *)periodics, periodiccnt - 1); 2115 ANHE_at_set (periodics [ev_active (w)]);
2116 upheap (periodics, ev_active (w));
1517 2117
1518 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2118 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1519} 2119}
1520 2120
1521void 2121void noinline
1522ev_periodic_stop (EV_P_ ev_periodic *w) 2122ev_periodic_stop (EV_P_ ev_periodic *w)
1523{ 2123{
1524 ev_clear_pending (EV_A_ (W)w); 2124 clear_pending (EV_A_ (W)w);
1525 if (expect_false (!ev_is_active (w))) 2125 if (expect_false (!ev_is_active (w)))
1526 return; 2126 return;
1527 2127
2128 {
2129 int active = ev_active (w);
2130
1528 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2131 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1529 2132
1530 if (expect_true (((W)w)->active < periodiccnt--)) 2133 if (expect_true (active < periodiccnt + HEAP0 - 1))
1531 { 2134 {
1532 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2135 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1533 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2136 adjustheap (periodics, periodiccnt, active);
1534 } 2137 }
2138
2139 --periodiccnt;
2140 }
1535 2141
1536 ev_stop (EV_A_ (W)w); 2142 ev_stop (EV_A_ (W)w);
1537} 2143}
1538 2144
1539void 2145void noinline
1540ev_periodic_again (EV_P_ ev_periodic *w) 2146ev_periodic_again (EV_P_ ev_periodic *w)
1541{ 2147{
1542 /* TODO: use adjustheap and recalculation */ 2148 /* TODO: use adjustheap and recalculation */
1543 ev_periodic_stop (EV_A_ w); 2149 ev_periodic_stop (EV_A_ w);
1544 ev_periodic_start (EV_A_ w); 2150 ev_periodic_start (EV_A_ w);
1545} 2151}
1546#endif 2152#endif
1547 2153
1548void 2154#ifndef SA_RESTART
2155# define SA_RESTART 0
2156#endif
2157
2158void noinline
1549ev_idle_start (EV_P_ ev_idle *w) 2159ev_signal_start (EV_P_ ev_signal *w)
1550{ 2160{
2161#if EV_MULTIPLICITY
2162 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2163#endif
1551 if (expect_false (ev_is_active (w))) 2164 if (expect_false (ev_is_active (w)))
1552 return; 2165 return;
1553 2166
2167 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2168
2169 evpipe_init (EV_A);
2170
2171 {
2172#ifndef _WIN32
2173 sigset_t full, prev;
2174 sigfillset (&full);
2175 sigprocmask (SIG_SETMASK, &full, &prev);
2176#endif
2177
2178 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2179
2180#ifndef _WIN32
2181 sigprocmask (SIG_SETMASK, &prev, 0);
2182#endif
2183 }
2184
1554 ev_start (EV_A_ (W)w, ++idlecnt); 2185 ev_start (EV_A_ (W)w, 1);
1555 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2186 wlist_add (&signals [w->signum - 1].head, (WL)w);
1556 idles [idlecnt - 1] = w;
1557}
1558 2187
1559void 2188 if (!((WL)w)->next)
2189 {
2190#if _WIN32
2191 signal (w->signum, ev_sighandler);
2192#else
2193 struct sigaction sa;
2194 sa.sa_handler = ev_sighandler;
2195 sigfillset (&sa.sa_mask);
2196 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2197 sigaction (w->signum, &sa, 0);
2198#endif
2199 }
2200}
2201
2202void noinline
1560ev_idle_stop (EV_P_ ev_idle *w) 2203ev_signal_stop (EV_P_ ev_signal *w)
1561{ 2204{
1562 ev_clear_pending (EV_A_ (W)w); 2205 clear_pending (EV_A_ (W)w);
1563 if (expect_false (!ev_is_active (w))) 2206 if (expect_false (!ev_is_active (w)))
1564 return; 2207 return;
1565 2208
2209 wlist_del (&signals [w->signum - 1].head, (WL)w);
2210 ev_stop (EV_A_ (W)w);
2211
2212 if (!signals [w->signum - 1].head)
2213 signal (w->signum, SIG_DFL);
2214}
2215
2216void
2217ev_child_start (EV_P_ ev_child *w)
2218{
2219#if EV_MULTIPLICITY
2220 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2221#endif
2222 if (expect_false (ev_is_active (w)))
2223 return;
2224
2225 ev_start (EV_A_ (W)w, 1);
2226 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2227}
2228
2229void
2230ev_child_stop (EV_P_ ev_child *w)
2231{
2232 clear_pending (EV_A_ (W)w);
2233 if (expect_false (!ev_is_active (w)))
2234 return;
2235
2236 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2237 ev_stop (EV_A_ (W)w);
2238}
2239
2240#if EV_STAT_ENABLE
2241
2242# ifdef _WIN32
2243# undef lstat
2244# define lstat(a,b) _stati64 (a,b)
2245# endif
2246
2247#define DEF_STAT_INTERVAL 5.0074891
2248#define MIN_STAT_INTERVAL 0.1074891
2249
2250static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2251
2252#if EV_USE_INOTIFY
2253# define EV_INOTIFY_BUFSIZE 8192
2254
2255static void noinline
2256infy_add (EV_P_ ev_stat *w)
2257{
2258 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2259
2260 if (w->wd < 0)
2261 {
2262 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2263
2264 /* monitor some parent directory for speedup hints */
2265 /* note that exceeding the hardcoded limit is not a correctness issue, */
2266 /* but an efficiency issue only */
2267 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2268 {
2269 char path [4096];
2270 strcpy (path, w->path);
2271
2272 do
2273 {
2274 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2275 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2276
2277 char *pend = strrchr (path, '/');
2278
2279 if (!pend)
2280 break; /* whoops, no '/', complain to your admin */
2281
2282 *pend = 0;
2283 w->wd = inotify_add_watch (fs_fd, path, mask);
2284 }
2285 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2286 }
2287 }
2288 else
2289 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2290
2291 if (w->wd >= 0)
2292 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2293}
2294
2295static void noinline
2296infy_del (EV_P_ ev_stat *w)
2297{
2298 int slot;
2299 int wd = w->wd;
2300
2301 if (wd < 0)
2302 return;
2303
2304 w->wd = -2;
2305 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2306 wlist_del (&fs_hash [slot].head, (WL)w);
2307
2308 /* remove this watcher, if others are watching it, they will rearm */
2309 inotify_rm_watch (fs_fd, wd);
2310}
2311
2312static void noinline
2313infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2314{
2315 if (slot < 0)
2316 /* overflow, need to check for all hahs slots */
2317 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2318 infy_wd (EV_A_ slot, wd, ev);
2319 else
2320 {
2321 WL w_;
2322
2323 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2324 {
2325 ev_stat *w = (ev_stat *)w_;
2326 w_ = w_->next; /* lets us remove this watcher and all before it */
2327
2328 if (w->wd == wd || wd == -1)
2329 {
2330 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2331 {
2332 w->wd = -1;
2333 infy_add (EV_A_ w); /* re-add, no matter what */
2334 }
2335
2336 stat_timer_cb (EV_A_ &w->timer, 0);
2337 }
2338 }
2339 }
2340}
2341
2342static void
2343infy_cb (EV_P_ ev_io *w, int revents)
2344{
2345 char buf [EV_INOTIFY_BUFSIZE];
2346 struct inotify_event *ev = (struct inotify_event *)buf;
2347 int ofs;
2348 int len = read (fs_fd, buf, sizeof (buf));
2349
2350 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2351 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2352}
2353
2354void inline_size
2355infy_init (EV_P)
2356{
2357 if (fs_fd != -2)
2358 return;
2359
2360 fs_fd = inotify_init ();
2361
2362 if (fs_fd >= 0)
2363 {
2364 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2365 ev_set_priority (&fs_w, EV_MAXPRI);
2366 ev_io_start (EV_A_ &fs_w);
2367 }
2368}
2369
2370void inline_size
2371infy_fork (EV_P)
2372{
2373 int slot;
2374
2375 if (fs_fd < 0)
2376 return;
2377
2378 close (fs_fd);
2379 fs_fd = inotify_init ();
2380
2381 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2382 {
2383 WL w_ = fs_hash [slot].head;
2384 fs_hash [slot].head = 0;
2385
2386 while (w_)
2387 {
2388 ev_stat *w = (ev_stat *)w_;
2389 w_ = w_->next; /* lets us add this watcher */
2390
2391 w->wd = -1;
2392
2393 if (fs_fd >= 0)
2394 infy_add (EV_A_ w); /* re-add, no matter what */
2395 else
2396 ev_timer_start (EV_A_ &w->timer);
2397 }
2398
2399 }
2400}
2401
2402#endif
2403
2404void
2405ev_stat_stat (EV_P_ ev_stat *w)
2406{
2407 if (lstat (w->path, &w->attr) < 0)
2408 w->attr.st_nlink = 0;
2409 else if (!w->attr.st_nlink)
2410 w->attr.st_nlink = 1;
2411}
2412
2413static void noinline
2414stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2415{
2416 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2417
2418 /* we copy this here each the time so that */
2419 /* prev has the old value when the callback gets invoked */
2420 w->prev = w->attr;
2421 ev_stat_stat (EV_A_ w);
2422
2423 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2424 if (
2425 w->prev.st_dev != w->attr.st_dev
2426 || w->prev.st_ino != w->attr.st_ino
2427 || w->prev.st_mode != w->attr.st_mode
2428 || w->prev.st_nlink != w->attr.st_nlink
2429 || w->prev.st_uid != w->attr.st_uid
2430 || w->prev.st_gid != w->attr.st_gid
2431 || w->prev.st_rdev != w->attr.st_rdev
2432 || w->prev.st_size != w->attr.st_size
2433 || w->prev.st_atime != w->attr.st_atime
2434 || w->prev.st_mtime != w->attr.st_mtime
2435 || w->prev.st_ctime != w->attr.st_ctime
2436 ) {
2437 #if EV_USE_INOTIFY
2438 infy_del (EV_A_ w);
2439 infy_add (EV_A_ w);
2440 ev_stat_stat (EV_A_ w); /* avoid race... */
2441 #endif
2442
2443 ev_feed_event (EV_A_ w, EV_STAT);
2444 }
2445}
2446
2447void
2448ev_stat_start (EV_P_ ev_stat *w)
2449{
2450 if (expect_false (ev_is_active (w)))
2451 return;
2452
2453 /* since we use memcmp, we need to clear any padding data etc. */
2454 memset (&w->prev, 0, sizeof (ev_statdata));
2455 memset (&w->attr, 0, sizeof (ev_statdata));
2456
2457 ev_stat_stat (EV_A_ w);
2458
2459 if (w->interval < MIN_STAT_INTERVAL)
2460 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2461
2462 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2463 ev_set_priority (&w->timer, ev_priority (w));
2464
2465#if EV_USE_INOTIFY
2466 infy_init (EV_A);
2467
2468 if (fs_fd >= 0)
2469 infy_add (EV_A_ w);
2470 else
2471#endif
2472 ev_timer_start (EV_A_ &w->timer);
2473
2474 ev_start (EV_A_ (W)w, 1);
2475}
2476
2477void
2478ev_stat_stop (EV_P_ ev_stat *w)
2479{
2480 clear_pending (EV_A_ (W)w);
2481 if (expect_false (!ev_is_active (w)))
2482 return;
2483
2484#if EV_USE_INOTIFY
2485 infy_del (EV_A_ w);
2486#endif
2487 ev_timer_stop (EV_A_ &w->timer);
2488
2489 ev_stop (EV_A_ (W)w);
2490}
2491#endif
2492
2493#if EV_IDLE_ENABLE
2494void
2495ev_idle_start (EV_P_ ev_idle *w)
2496{
2497 if (expect_false (ev_is_active (w)))
2498 return;
2499
2500 pri_adjust (EV_A_ (W)w);
2501
1566 { 2502 {
1567 int active = ((W)w)->active; 2503 int active = ++idlecnt [ABSPRI (w)];
1568 idles [active - 1] = idles [--idlecnt]; 2504
1569 ((W)idles [active - 1])->active = active; 2505 ++idleall;
2506 ev_start (EV_A_ (W)w, active);
2507
2508 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2509 idles [ABSPRI (w)][active - 1] = w;
1570 } 2510 }
2511}
1571 2512
2513void
2514ev_idle_stop (EV_P_ ev_idle *w)
2515{
2516 clear_pending (EV_A_ (W)w);
2517 if (expect_false (!ev_is_active (w)))
2518 return;
2519
2520 {
2521 int active = ev_active (w);
2522
2523 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2524 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2525
1572 ev_stop (EV_A_ (W)w); 2526 ev_stop (EV_A_ (W)w);
2527 --idleall;
2528 }
1573} 2529}
2530#endif
1574 2531
1575void 2532void
1576ev_prepare_start (EV_P_ ev_prepare *w) 2533ev_prepare_start (EV_P_ ev_prepare *w)
1577{ 2534{
1578 if (expect_false (ev_is_active (w))) 2535 if (expect_false (ev_is_active (w)))
… …
1584} 2541}
1585 2542
1586void 2543void
1587ev_prepare_stop (EV_P_ ev_prepare *w) 2544ev_prepare_stop (EV_P_ ev_prepare *w)
1588{ 2545{
1589 ev_clear_pending (EV_A_ (W)w); 2546 clear_pending (EV_A_ (W)w);
1590 if (expect_false (!ev_is_active (w))) 2547 if (expect_false (!ev_is_active (w)))
1591 return; 2548 return;
1592 2549
1593 { 2550 {
1594 int active = ((W)w)->active; 2551 int active = ev_active (w);
2552
1595 prepares [active - 1] = prepares [--preparecnt]; 2553 prepares [active - 1] = prepares [--preparecnt];
1596 ((W)prepares [active - 1])->active = active; 2554 ev_active (prepares [active - 1]) = active;
1597 } 2555 }
1598 2556
1599 ev_stop (EV_A_ (W)w); 2557 ev_stop (EV_A_ (W)w);
1600} 2558}
1601 2559
… …
1611} 2569}
1612 2570
1613void 2571void
1614ev_check_stop (EV_P_ ev_check *w) 2572ev_check_stop (EV_P_ ev_check *w)
1615{ 2573{
1616 ev_clear_pending (EV_A_ (W)w); 2574 clear_pending (EV_A_ (W)w);
1617 if (expect_false (!ev_is_active (w))) 2575 if (expect_false (!ev_is_active (w)))
1618 return; 2576 return;
1619 2577
1620 { 2578 {
1621 int active = ((W)w)->active; 2579 int active = ev_active (w);
2580
1622 checks [active - 1] = checks [--checkcnt]; 2581 checks [active - 1] = checks [--checkcnt];
1623 ((W)checks [active - 1])->active = active; 2582 ev_active (checks [active - 1]) = active;
1624 } 2583 }
1625 2584
1626 ev_stop (EV_A_ (W)w); 2585 ev_stop (EV_A_ (W)w);
1627} 2586}
1628 2587
1629#ifndef SA_RESTART 2588#if EV_EMBED_ENABLE
1630# define SA_RESTART 0 2589void noinline
1631#endif
1632
1633void
1634ev_signal_start (EV_P_ ev_signal *w)
1635{
1636#if EV_MULTIPLICITY
1637 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1638#endif
1639 if (expect_false (ev_is_active (w)))
1640 return;
1641
1642 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1643
1644 ev_start (EV_A_ (W)w, 1);
1645 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1646 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1647
1648 if (!((WL)w)->next)
1649 {
1650#if _WIN32
1651 signal (w->signum, sighandler);
1652#else
1653 struct sigaction sa;
1654 sa.sa_handler = sighandler;
1655 sigfillset (&sa.sa_mask);
1656 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1657 sigaction (w->signum, &sa, 0);
1658#endif
1659 }
1660}
1661
1662void
1663ev_signal_stop (EV_P_ ev_signal *w)
1664{
1665 ev_clear_pending (EV_A_ (W)w);
1666 if (expect_false (!ev_is_active (w)))
1667 return;
1668
1669 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1670 ev_stop (EV_A_ (W)w);
1671
1672 if (!signals [w->signum - 1].head)
1673 signal (w->signum, SIG_DFL);
1674}
1675
1676void
1677ev_child_start (EV_P_ ev_child *w)
1678{
1679#if EV_MULTIPLICITY
1680 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1681#endif
1682 if (expect_false (ev_is_active (w)))
1683 return;
1684
1685 ev_start (EV_A_ (W)w, 1);
1686 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1687}
1688
1689void
1690ev_child_stop (EV_P_ ev_child *w)
1691{
1692 ev_clear_pending (EV_A_ (W)w);
1693 if (expect_false (!ev_is_active (w)))
1694 return;
1695
1696 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1697 ev_stop (EV_A_ (W)w);
1698}
1699
1700#if EV_MULTIPLICITY
1701void
1702ev_embed_sweep (EV_P_ ev_embed *w) 2590ev_embed_sweep (EV_P_ ev_embed *w)
1703{ 2591{
1704 ev_loop (w->loop, EVLOOP_NONBLOCK); 2592 ev_loop (w->other, EVLOOP_NONBLOCK);
1705} 2593}
1706 2594
1707static void 2595static void
1708embed_cb (EV_P_ ev_io *io, int revents) 2596embed_io_cb (EV_P_ ev_io *io, int revents)
1709{ 2597{
1710 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2598 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1711 2599
1712 if (ev_cb (w)) 2600 if (ev_cb (w))
1713 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2601 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1714 else 2602 else
1715 ev_embed_sweep (loop, w); 2603 ev_loop (w->other, EVLOOP_NONBLOCK);
1716} 2604}
2605
2606static void
2607embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2608{
2609 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2610
2611 {
2612 struct ev_loop *loop = w->other;
2613
2614 while (fdchangecnt)
2615 {
2616 fd_reify (EV_A);
2617 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2618 }
2619 }
2620}
2621
2622#if 0
2623static void
2624embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2625{
2626 ev_idle_stop (EV_A_ idle);
2627}
2628#endif
1717 2629
1718void 2630void
1719ev_embed_start (EV_P_ ev_embed *w) 2631ev_embed_start (EV_P_ ev_embed *w)
1720{ 2632{
1721 if (expect_false (ev_is_active (w))) 2633 if (expect_false (ev_is_active (w)))
1722 return; 2634 return;
1723 2635
1724 { 2636 {
1725 struct ev_loop *loop = w->loop; 2637 struct ev_loop *loop = w->other;
1726 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2638 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1727 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 2639 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1728 } 2640 }
1729 2641
1730 ev_set_priority (&w->io, ev_priority (w)); 2642 ev_set_priority (&w->io, ev_priority (w));
1731 ev_io_start (EV_A_ &w->io); 2643 ev_io_start (EV_A_ &w->io);
2644
2645 ev_prepare_init (&w->prepare, embed_prepare_cb);
2646 ev_set_priority (&w->prepare, EV_MINPRI);
2647 ev_prepare_start (EV_A_ &w->prepare);
2648
2649 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2650
1732 ev_start (EV_A_ (W)w, 1); 2651 ev_start (EV_A_ (W)w, 1);
1733} 2652}
1734 2653
1735void 2654void
1736ev_embed_stop (EV_P_ ev_embed *w) 2655ev_embed_stop (EV_P_ ev_embed *w)
1737{ 2656{
1738 ev_clear_pending (EV_A_ (W)w); 2657 clear_pending (EV_A_ (W)w);
1739 if (expect_false (!ev_is_active (w))) 2658 if (expect_false (!ev_is_active (w)))
1740 return; 2659 return;
1741 2660
1742 ev_io_stop (EV_A_ &w->io); 2661 ev_io_stop (EV_A_ &w->io);
2662 ev_prepare_stop (EV_A_ &w->prepare);
2663
1743 ev_stop (EV_A_ (W)w); 2664 ev_stop (EV_A_ (W)w);
2665}
2666#endif
2667
2668#if EV_FORK_ENABLE
2669void
2670ev_fork_start (EV_P_ ev_fork *w)
2671{
2672 if (expect_false (ev_is_active (w)))
2673 return;
2674
2675 ev_start (EV_A_ (W)w, ++forkcnt);
2676 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2677 forks [forkcnt - 1] = w;
2678}
2679
2680void
2681ev_fork_stop (EV_P_ ev_fork *w)
2682{
2683 clear_pending (EV_A_ (W)w);
2684 if (expect_false (!ev_is_active (w)))
2685 return;
2686
2687 {
2688 int active = ev_active (w);
2689
2690 forks [active - 1] = forks [--forkcnt];
2691 ev_active (forks [active - 1]) = active;
2692 }
2693
2694 ev_stop (EV_A_ (W)w);
2695}
2696#endif
2697
2698#if EV_ASYNC_ENABLE
2699void
2700ev_async_start (EV_P_ ev_async *w)
2701{
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 evpipe_init (EV_A);
2706
2707 ev_start (EV_A_ (W)w, ++asynccnt);
2708 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2709 asyncs [asynccnt - 1] = w;
2710}
2711
2712void
2713ev_async_stop (EV_P_ ev_async *w)
2714{
2715 clear_pending (EV_A_ (W)w);
2716 if (expect_false (!ev_is_active (w)))
2717 return;
2718
2719 {
2720 int active = ev_active (w);
2721
2722 asyncs [active - 1] = asyncs [--asynccnt];
2723 ev_active (asyncs [active - 1]) = active;
2724 }
2725
2726 ev_stop (EV_A_ (W)w);
2727}
2728
2729void
2730ev_async_send (EV_P_ ev_async *w)
2731{
2732 w->sent = 1;
2733 evpipe_write (EV_A_ &gotasync);
1744} 2734}
1745#endif 2735#endif
1746 2736
1747/*****************************************************************************/ 2737/*****************************************************************************/
1748 2738
… …
1806 ev_timer_set (&once->to, timeout, 0.); 2796 ev_timer_set (&once->to, timeout, 0.);
1807 ev_timer_start (EV_A_ &once->to); 2797 ev_timer_start (EV_A_ &once->to);
1808 } 2798 }
1809} 2799}
1810 2800
2801#if EV_MULTIPLICITY
2802 #include "ev_wrap.h"
2803#endif
2804
1811#ifdef __cplusplus 2805#ifdef __cplusplus
1812} 2806}
1813#endif 2807#endif
1814 2808

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