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Comparing libev/ev.c (file contents):
Revision 1.135 by root, Sat Nov 24 06:23:27 2007 UTC vs.
Revision 1.246 by root, Wed May 21 12:51:38 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 struct ev_watcher *W; 334typedef ev_watcher *W;
208typedef struct ev_watcher_list *WL; 335typedef ev_watcher_list *WL;
209typedef struct 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 if (expect_false (!w_->cb))
403 return;
404
405 w_->pending = ++pendingcnt [ABSPRI (w_)];
406 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
407 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
408 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
409}
410
411static void
412queue_events (EV_P_ W *events, int eventcnt, int type)
413{
414 int i;
415
416 for (i = 0; i < eventcnt; ++i)
417 ev_feed_event (EV_A_ events [i], type);
418}
419
420inline void
421fd_event (EV_P_ int fd, int revents) 648fd_event (EV_P_ int fd, int revents)
422{ 649{
423 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
424 struct ev_io *w; 651 ev_io *w;
425 652
426 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
427 { 654 {
428 int ev = w->events & revents; 655 int ev = w->events & revents;
429 656
430 if (ev) 657 if (ev)
431 ev_feed_event (EV_A_ (W)w, ev); 658 ev_feed_event (EV_A_ (W)w, ev);
… …
433} 660}
434 661
435void 662void
436ev_feed_fd_event (EV_P_ int fd, int revents) 663ev_feed_fd_event (EV_P_ int fd, int revents)
437{ 664{
665 if (fd >= 0 && fd < anfdmax)
438 fd_event (EV_A_ fd, revents); 666 fd_event (EV_A_ fd, revents);
439} 667}
440 668
441/*****************************************************************************/ 669void inline_size
442
443inline void
444fd_reify (EV_P) 670fd_reify (EV_P)
445{ 671{
446 int i; 672 int i;
447 673
448 for (i = 0; i < fdchangecnt; ++i) 674 for (i = 0; i < fdchangecnt; ++i)
449 { 675 {
450 int fd = fdchanges [i]; 676 int fd = fdchanges [i];
451 ANFD *anfd = anfds + fd; 677 ANFD *anfd = anfds + fd;
452 struct ev_io *w; 678 ev_io *w;
453 679
454 int events = 0; 680 unsigned char events = 0;
455 681
456 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
457 events |= w->events; 683 events |= (unsigned char)w->events;
458 684
459#if EV_SELECT_IS_WINSOCKET 685#if EV_SELECT_IS_WINSOCKET
460 if (events) 686 if (events)
461 { 687 {
462 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
463 anfd->handle = _get_osfhandle (fd); 692 anfd->handle = _get_osfhandle (fd);
693 #endif
464 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));
465 } 695 }
466#endif 696#endif
467 697
698 {
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
468 anfd->reify = 0; 702 anfd->reify = 0;
469
470 backend_modify (EV_A_ fd, anfd->events, events);
471 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 }
472 } 708 }
473 709
474 fdchangecnt = 0; 710 fdchangecnt = 0;
475} 711}
476 712
477static void 713void inline_size
478fd_change (EV_P_ int fd) 714fd_change (EV_P_ int fd, int flags)
479{ 715{
480 if (expect_false (anfds [fd].reify)) 716 unsigned char reify = anfds [fd].reify;
481 return;
482
483 anfds [fd].reify = 1; 717 anfds [fd].reify |= flags;
484 718
719 if (expect_true (!reify))
720 {
485 ++fdchangecnt; 721 ++fdchangecnt;
486 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
487 fdchanges [fdchangecnt - 1] = fd; 723 fdchanges [fdchangecnt - 1] = fd;
724 }
488} 725}
489 726
490static void 727void inline_speed
491fd_kill (EV_P_ int fd) 728fd_kill (EV_P_ int fd)
492{ 729{
493 struct ev_io *w; 730 ev_io *w;
494 731
495 while ((w = (struct ev_io *)anfds [fd].head)) 732 while ((w = (ev_io *)anfds [fd].head))
496 { 733 {
497 ev_io_stop (EV_A_ w); 734 ev_io_stop (EV_A_ w);
498 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);
499 } 736 }
500} 737}
501 738
502inline int 739int inline_size
503fd_valid (int fd) 740fd_valid (int fd)
504{ 741{
505#ifdef _WIN32 742#ifdef _WIN32
506 return _get_osfhandle (fd) != -1; 743 return _get_osfhandle (fd) != -1;
507#else 744#else
508 return fcntl (fd, F_GETFD) != -1; 745 return fcntl (fd, F_GETFD) != -1;
509#endif 746#endif
510} 747}
511 748
512/* called on EBADF to verify fds */ 749/* called on EBADF to verify fds */
513static void 750static void noinline
514fd_ebadf (EV_P) 751fd_ebadf (EV_P)
515{ 752{
516 int fd; 753 int fd;
517 754
518 for (fd = 0; fd < anfdmax; ++fd) 755 for (fd = 0; fd < anfdmax; ++fd)
… …
520 if (!fd_valid (fd) == -1 && errno == EBADF) 757 if (!fd_valid (fd) == -1 && errno == EBADF)
521 fd_kill (EV_A_ fd); 758 fd_kill (EV_A_ fd);
522} 759}
523 760
524/* 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 */
525static void 762static void noinline
526fd_enomem (EV_P) 763fd_enomem (EV_P)
527{ 764{
528 int fd; 765 int fd;
529 766
530 for (fd = anfdmax; fd--; ) 767 for (fd = anfdmax; fd--; )
… …
534 return; 771 return;
535 } 772 }
536} 773}
537 774
538/* 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 */
539static void 776static void noinline
540fd_rearm_all (EV_P) 777fd_rearm_all (EV_P)
541{ 778{
542 int fd; 779 int fd;
543 780
544 /* this should be highly optimised to not do anything but set a flag */
545 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
546 if (anfds [fd].events) 782 if (anfds [fd].events)
547 { 783 {
548 anfds [fd].events = 0; 784 anfds [fd].events = 0;
549 fd_change (EV_A_ fd); 785 fd_change (EV_A_ fd, EV_IOFDSET | 1);
550 } 786 }
551} 787}
552 788
553/*****************************************************************************/ 789/*****************************************************************************/
554 790
555static 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
808/* towards the root */
809void inline_speed
556upheap (WT *heap, int k) 810upheap (ANHE *heap, int k)
557{ 811{
558 WT w = heap [k]; 812 ANHE he = heap [k];
559 813
560 while (k && heap [k >> 1]->at > w->at) 814 for (;;)
561 {
562 heap [k] = heap [k >> 1];
563 ((W)heap [k])->active = k + 1;
564 k >>= 1;
565 } 815 {
816 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
566 817
567 heap [k] = w; 818 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
568 ((W)heap [k])->active = k + 1;
569
570}
571
572static void
573downheap (WT *heap, int N, int k)
574{
575 WT w = heap [k];
576
577 while (k < (N >> 1))
578 {
579 int j = k << 1;
580
581 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
582 ++j;
583
584 if (w->at <= heap [j]->at)
585 break; 819 break;
586 820
587 heap [k] = heap [j]; 821 heap [k] = heap [p];
588 ((W)heap [k])->active = k + 1; 822 ev_active (ANHE_w (heap [k])) = k;
589 k = j; 823 k = p;
590 } 824 }
591 825
826 ev_active (ANHE_w (he)) = k;
592 heap [k] = w; 827 heap [k] = he;
593 ((W)heap [k])->active = k + 1;
594} 828}
595 829
596inline void 830/* away from the root */
831void inline_speed
832downheap (ANHE *heap, int N, int k)
833{
834 ANHE he = heap [k];
835 ANHE *E = heap + N + HEAP0;
836
837 for (;;)
838 {
839 ev_tstamp minat;
840 ANHE *minpos;
841 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
842
843 // find minimum child
844 if (expect_true (pos + DHEAP - 1 < E))
845 {
846 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
847 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
849 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
850 }
851 else if (pos < E)
852 {
853 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
854 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 }
858 else
859 break;
860
861 if (ANHE_at (he) <= minat)
862 break;
863
864 ev_active (ANHE_w (*minpos)) = k;
865 heap [k] = *minpos;
866
867 k = minpos - heap;
868 }
869
870 ev_active (ANHE_w (he)) = k;
871 heap [k] = he;
872}
873
874#else // 4HEAP
875
876#define HEAP0 1
877
878/* towards the root */
879void inline_speed
880upheap (ANHE *heap, int k)
881{
882 ANHE he = heap [k];
883
884 for (;;)
885 {
886 int p = k >> 1;
887
888 /* maybe we could use a dummy element at heap [0]? */
889 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
890 break;
891
892 heap [k] = heap [p];
893 ev_active (ANHE_w (heap [k])) = k;
894 k = p;
895 }
896
897 heap [k] = he;
898 ev_active (ANHE_w (heap [k])) = k;
899}
900
901/* away from the root */
902void inline_speed
903downheap (ANHE *heap, int N, int k)
904{
905 ANHE he = heap [k];
906
907 for (;;)
908 {
909 int c = k << 1;
910
911 if (c > N)
912 break;
913
914 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
915 ? 1 : 0;
916
917 if (ANHE_at (he) <= ANHE_at (heap [c]))
918 break;
919
920 heap [k] = heap [c];
921 ev_active (ANHE_w (heap [k])) = k;
922
923 k = c;
924 }
925
926 heap [k] = he;
927 ev_active (ANHE_w (he)) = k;
928}
929#endif
930
931void inline_size
597adjustheap (WT *heap, int N, int k) 932adjustheap (ANHE *heap, int N, int k)
598{ 933{
599 upheap (heap, k); 934 upheap (heap, k);
600 downheap (heap, N, k); 935 downheap (heap, N, k);
601} 936}
602 937
603/*****************************************************************************/ 938/*****************************************************************************/
604 939
605typedef struct 940typedef struct
606{ 941{
607 WL head; 942 WL head;
608 sig_atomic_t volatile gotsig; 943 EV_ATOMIC_T gotsig;
609} ANSIG; 944} ANSIG;
610 945
611static ANSIG *signals; 946static ANSIG *signals;
612static int signalmax; 947static int signalmax;
613 948
614static int sigpipe [2]; 949static EV_ATOMIC_T gotsig;
615static sig_atomic_t volatile gotsig;
616static struct ev_io sigev;
617 950
618static void 951void inline_size
619signals_init (ANSIG *base, int count) 952signals_init (ANSIG *base, int count)
620{ 953{
621 while (count--) 954 while (count--)
622 { 955 {
623 base->head = 0; 956 base->head = 0;
… …
625 958
626 ++base; 959 ++base;
627 } 960 }
628} 961}
629 962
630static void 963/*****************************************************************************/
631sighandler (int signum)
632{
633#if _WIN32
634 signal (signum, sighandler);
635#endif
636 964
637 signals [signum - 1].gotsig = 1; 965void inline_speed
638
639 if (!gotsig)
640 {
641 int old_errno = errno;
642 gotsig = 1;
643 write (sigpipe [1], &signum, 1);
644 errno = old_errno;
645 }
646}
647
648void
649ev_feed_signal_event (EV_P_ int signum)
650{
651 WL w;
652
653#if EV_MULTIPLICITY
654 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
655#endif
656
657 --signum;
658
659 if (signum < 0 || signum >= signalmax)
660 return;
661
662 signals [signum].gotsig = 0;
663
664 for (w = signals [signum].head; w; w = w->next)
665 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
666}
667
668static void
669sigcb (EV_P_ struct ev_io *iow, int revents)
670{
671 int signum;
672
673 read (sigpipe [0], &revents, 1);
674 gotsig = 0;
675
676 for (signum = signalmax; signum--; )
677 if (signals [signum].gotsig)
678 ev_feed_signal_event (EV_A_ signum + 1);
679}
680
681static void
682fd_intern (int fd) 966fd_intern (int fd)
683{ 967{
684#ifdef _WIN32 968#ifdef _WIN32
685 int arg = 1; 969 int arg = 1;
686 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 970 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
… …
688 fcntl (fd, F_SETFD, FD_CLOEXEC); 972 fcntl (fd, F_SETFD, FD_CLOEXEC);
689 fcntl (fd, F_SETFL, O_NONBLOCK); 973 fcntl (fd, F_SETFL, O_NONBLOCK);
690#endif 974#endif
691} 975}
692 976
977static void noinline
978evpipe_init (EV_P)
979{
980 if (!ev_is_active (&pipeev))
981 {
982#if EV_USE_EVENTFD
983 if ((evfd = eventfd (0, 0)) >= 0)
984 {
985 evpipe [0] = -1;
986 fd_intern (evfd);
987 ev_io_set (&pipeev, evfd, EV_READ);
988 }
989 else
990#endif
991 {
992 while (pipe (evpipe))
993 syserr ("(libev) error creating signal/async pipe");
994
995 fd_intern (evpipe [0]);
996 fd_intern (evpipe [1]);
997 ev_io_set (&pipeev, evpipe [0], EV_READ);
998 }
999
1000 ev_io_start (EV_A_ &pipeev);
1001 ev_unref (EV_A); /* watcher should not keep loop alive */
1002 }
1003}
1004
1005void inline_size
1006evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1007{
1008 if (!*flag)
1009 {
1010 int old_errno = errno; /* save errno because write might clobber it */
1011
1012 *flag = 1;
1013
1014#if EV_USE_EVENTFD
1015 if (evfd >= 0)
1016 {
1017 uint64_t counter = 1;
1018 write (evfd, &counter, sizeof (uint64_t));
1019 }
1020 else
1021#endif
1022 write (evpipe [1], &old_errno, 1);
1023
1024 errno = old_errno;
1025 }
1026}
1027
693static void 1028static void
694siginit (EV_P) 1029pipecb (EV_P_ ev_io *iow, int revents)
695{ 1030{
696 fd_intern (sigpipe [0]); 1031#if EV_USE_EVENTFD
697 fd_intern (sigpipe [1]); 1032 if (evfd >= 0)
1033 {
1034 uint64_t counter;
1035 read (evfd, &counter, sizeof (uint64_t));
1036 }
1037 else
1038#endif
1039 {
1040 char dummy;
1041 read (evpipe [0], &dummy, 1);
1042 }
698 1043
699 ev_io_set (&sigev, sigpipe [0], EV_READ); 1044 if (gotsig && ev_is_default_loop (EV_A))
700 ev_io_start (EV_A_ &sigev); 1045 {
701 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1046 int signum;
1047 gotsig = 0;
1048
1049 for (signum = signalmax; signum--; )
1050 if (signals [signum].gotsig)
1051 ev_feed_signal_event (EV_A_ signum + 1);
1052 }
1053
1054#if EV_ASYNC_ENABLE
1055 if (gotasync)
1056 {
1057 int i;
1058 gotasync = 0;
1059
1060 for (i = asynccnt; i--; )
1061 if (asyncs [i]->sent)
1062 {
1063 asyncs [i]->sent = 0;
1064 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1065 }
1066 }
1067#endif
702} 1068}
703 1069
704/*****************************************************************************/ 1070/*****************************************************************************/
705 1071
706static struct ev_child *childs [PID_HASHSIZE]; 1072static void
1073ev_sighandler (int signum)
1074{
1075#if EV_MULTIPLICITY
1076 struct ev_loop *loop = &default_loop_struct;
1077#endif
1078
1079#if _WIN32
1080 signal (signum, ev_sighandler);
1081#endif
1082
1083 signals [signum - 1].gotsig = 1;
1084 evpipe_write (EV_A_ &gotsig);
1085}
1086
1087void noinline
1088ev_feed_signal_event (EV_P_ int signum)
1089{
1090 WL w;
1091
1092#if EV_MULTIPLICITY
1093 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1094#endif
1095
1096 --signum;
1097
1098 if (signum < 0 || signum >= signalmax)
1099 return;
1100
1101 signals [signum].gotsig = 0;
1102
1103 for (w = signals [signum].head; w; w = w->next)
1104 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1105}
1106
1107/*****************************************************************************/
1108
1109static WL childs [EV_PID_HASHSIZE];
707 1110
708#ifndef _WIN32 1111#ifndef _WIN32
709 1112
710static struct ev_signal childev; 1113static ev_signal childev;
1114
1115#ifndef WIFCONTINUED
1116# define WIFCONTINUED(status) 0
1117#endif
1118
1119void inline_speed
1120child_reap (EV_P_ int chain, int pid, int status)
1121{
1122 ev_child *w;
1123 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1124
1125 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1126 {
1127 if ((w->pid == pid || !w->pid)
1128 && (!traced || (w->flags & 1)))
1129 {
1130 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1131 w->rpid = pid;
1132 w->rstatus = status;
1133 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1134 }
1135 }
1136}
711 1137
712#ifndef WCONTINUED 1138#ifndef WCONTINUED
713# define WCONTINUED 0 1139# define WCONTINUED 0
714#endif 1140#endif
715 1141
716static void 1142static void
717child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
718{
719 struct ev_child *w;
720
721 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
722 if (w->pid == pid || !w->pid)
723 {
724 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
725 w->rpid = pid;
726 w->rstatus = status;
727 ev_feed_event (EV_A_ (W)w, EV_CHILD);
728 }
729}
730
731static void
732childcb (EV_P_ struct ev_signal *sw, int revents) 1143childcb (EV_P_ ev_signal *sw, int revents)
733{ 1144{
734 int pid, status; 1145 int pid, status;
735 1146
1147 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
736 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1148 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
737 { 1149 if (!WCONTINUED
1150 || errno != EINVAL
1151 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1152 return;
1153
738 /* make sure we are called again until all childs have been reaped */ 1154 /* make sure we are called again until all children have been reaped */
739 /* we need to do it this way so that the callback gets called before we continue */ 1155 /* we need to do it this way so that the callback gets called before we continue */
740 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1156 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
741 1157
742 child_reap (EV_A_ sw, pid, pid, status); 1158 child_reap (EV_A_ pid, pid, status);
1159 if (EV_PID_HASHSIZE > 1)
743 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1160 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
744 }
745} 1161}
746 1162
747#endif 1163#endif
748 1164
749/*****************************************************************************/ 1165/*****************************************************************************/
… …
775{ 1191{
776 return EV_VERSION_MINOR; 1192 return EV_VERSION_MINOR;
777} 1193}
778 1194
779/* return true if we are running with elevated privileges and should ignore env variables */ 1195/* return true if we are running with elevated privileges and should ignore env variables */
780static int 1196int inline_size
781enable_secure (void) 1197enable_secure (void)
782{ 1198{
783#ifdef _WIN32 1199#ifdef _WIN32
784 return 0; 1200 return 0;
785#else 1201#else
… …
821} 1237}
822 1238
823unsigned int 1239unsigned int
824ev_embeddable_backends (void) 1240ev_embeddable_backends (void)
825{ 1241{
826 return EVBACKEND_EPOLL 1242 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
827 | EVBACKEND_KQUEUE 1243
828 | EVBACKEND_PORT; 1244 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1245 /* please fix it and tell me how to detect the fix */
1246 flags &= ~EVBACKEND_EPOLL;
1247
1248 return flags;
829} 1249}
830 1250
831unsigned int 1251unsigned int
832ev_backend (EV_P) 1252ev_backend (EV_P)
833{ 1253{
834 return backend; 1254 return backend;
835} 1255}
836 1256
837static void 1257unsigned int
1258ev_loop_count (EV_P)
1259{
1260 return loop_count;
1261}
1262
1263void
1264ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1265{
1266 io_blocktime = interval;
1267}
1268
1269void
1270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1271{
1272 timeout_blocktime = interval;
1273}
1274
1275static void noinline
838loop_init (EV_P_ unsigned int flags) 1276loop_init (EV_P_ unsigned int flags)
839{ 1277{
840 if (!backend) 1278 if (!backend)
841 { 1279 {
842#if EV_USE_MONOTONIC 1280#if EV_USE_MONOTONIC
… …
845 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1283 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
846 have_monotonic = 1; 1284 have_monotonic = 1;
847 } 1285 }
848#endif 1286#endif
849 1287
850 ev_rt_now = ev_time (); 1288 ev_rt_now = ev_time ();
851 mn_now = get_clock (); 1289 mn_now = get_clock ();
852 now_floor = mn_now; 1290 now_floor = mn_now;
853 rtmn_diff = ev_rt_now - mn_now; 1291 rtmn_diff = ev_rt_now - mn_now;
1292
1293 io_blocktime = 0.;
1294 timeout_blocktime = 0.;
1295 backend = 0;
1296 backend_fd = -1;
1297 gotasync = 0;
1298#if EV_USE_INOTIFY
1299 fs_fd = -2;
1300#endif
1301
1302 /* pid check not overridable via env */
1303#ifndef _WIN32
1304 if (flags & EVFLAG_FORKCHECK)
1305 curpid = getpid ();
1306#endif
854 1307
855 if (!(flags & EVFLAG_NOENV) 1308 if (!(flags & EVFLAG_NOENV)
856 && !enable_secure () 1309 && !enable_secure ()
857 && getenv ("LIBEV_FLAGS")) 1310 && getenv ("LIBEV_FLAGS"))
858 flags = atoi (getenv ("LIBEV_FLAGS")); 1311 flags = atoi (getenv ("LIBEV_FLAGS"));
859 1312
860 if (!(flags & 0x0000ffffUL)) 1313 if (!(flags & 0x0000ffffU))
861 flags |= ev_recommended_backends (); 1314 flags |= ev_recommended_backends ();
862 1315
863 backend = 0;
864#if EV_USE_PORT 1316#if EV_USE_PORT
865 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
866#endif 1318#endif
867#if EV_USE_KQUEUE 1319#if EV_USE_KQUEUE
868 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
875#endif 1327#endif
876#if EV_USE_SELECT 1328#if EV_USE_SELECT
877 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
878#endif 1330#endif
879 1331
880 ev_init (&sigev, sigcb); 1332 ev_init (&pipeev, pipecb);
881 ev_set_priority (&sigev, EV_MAXPRI); 1333 ev_set_priority (&pipeev, EV_MAXPRI);
882 } 1334 }
883} 1335}
884 1336
885static void 1337static void noinline
886loop_destroy (EV_P) 1338loop_destroy (EV_P)
887{ 1339{
888 int i; 1340 int i;
1341
1342 if (ev_is_active (&pipeev))
1343 {
1344 ev_ref (EV_A); /* signal watcher */
1345 ev_io_stop (EV_A_ &pipeev);
1346
1347#if EV_USE_EVENTFD
1348 if (evfd >= 0)
1349 close (evfd);
1350#endif
1351
1352 if (evpipe [0] >= 0)
1353 {
1354 close (evpipe [0]);
1355 close (evpipe [1]);
1356 }
1357 }
1358
1359#if EV_USE_INOTIFY
1360 if (fs_fd >= 0)
1361 close (fs_fd);
1362#endif
1363
1364 if (backend_fd >= 0)
1365 close (backend_fd);
889 1366
890#if EV_USE_PORT 1367#if EV_USE_PORT
891 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1368 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
892#endif 1369#endif
893#if EV_USE_KQUEUE 1370#if EV_USE_KQUEUE
… …
902#if EV_USE_SELECT 1379#if EV_USE_SELECT
903 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1380 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
904#endif 1381#endif
905 1382
906 for (i = NUMPRI; i--; ) 1383 for (i = NUMPRI; i--; )
1384 {
907 array_free (pending, [i]); 1385 array_free (pending, [i]);
1386#if EV_IDLE_ENABLE
1387 array_free (idle, [i]);
1388#endif
1389 }
1390
1391 ev_free (anfds); anfdmax = 0;
908 1392
909 /* have to use the microsoft-never-gets-it-right macro */ 1393 /* have to use the microsoft-never-gets-it-right macro */
910 array_free (fdchange, EMPTY0); 1394 array_free (fdchange, EMPTY);
911 array_free (timer, EMPTY0); 1395 array_free (timer, EMPTY);
912#if EV_PERIODICS 1396#if EV_PERIODIC_ENABLE
913 array_free (periodic, EMPTY0); 1397 array_free (periodic, EMPTY);
914#endif 1398#endif
1399#if EV_FORK_ENABLE
915 array_free (idle, EMPTY0); 1400 array_free (fork, EMPTY);
1401#endif
916 array_free (prepare, EMPTY0); 1402 array_free (prepare, EMPTY);
917 array_free (check, EMPTY0); 1403 array_free (check, EMPTY);
1404#if EV_ASYNC_ENABLE
1405 array_free (async, EMPTY);
1406#endif
918 1407
919 backend = 0; 1408 backend = 0;
920} 1409}
921 1410
922static void 1411#if EV_USE_INOTIFY
1412void inline_size infy_fork (EV_P);
1413#endif
1414
1415void inline_size
923loop_fork (EV_P) 1416loop_fork (EV_P)
924{ 1417{
925#if EV_USE_PORT 1418#if EV_USE_PORT
926 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1419 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
927#endif 1420#endif
… …
929 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1422 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
930#endif 1423#endif
931#if EV_USE_EPOLL 1424#if EV_USE_EPOLL
932 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1425 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
933#endif 1426#endif
1427#if EV_USE_INOTIFY
1428 infy_fork (EV_A);
1429#endif
934 1430
935 if (ev_is_active (&sigev)) 1431 if (ev_is_active (&pipeev))
936 { 1432 {
937 /* default loop */ 1433 /* this "locks" the handlers against writing to the pipe */
1434 /* while we modify the fd vars */
1435 gotsig = 1;
1436#if EV_ASYNC_ENABLE
1437 gotasync = 1;
1438#endif
938 1439
939 ev_ref (EV_A); 1440 ev_ref (EV_A);
940 ev_io_stop (EV_A_ &sigev); 1441 ev_io_stop (EV_A_ &pipeev);
1442
1443#if EV_USE_EVENTFD
1444 if (evfd >= 0)
1445 close (evfd);
1446#endif
1447
1448 if (evpipe [0] >= 0)
1449 {
941 close (sigpipe [0]); 1450 close (evpipe [0]);
942 close (sigpipe [1]); 1451 close (evpipe [1]);
1452 }
943 1453
944 while (pipe (sigpipe))
945 syserr ("(libev) error creating pipe");
946
947 siginit (EV_A); 1454 evpipe_init (EV_A);
1455 /* now iterate over everything, in case we missed something */
1456 pipecb (EV_A_ &pipeev, EV_READ);
948 } 1457 }
949 1458
950 postfork = 0; 1459 postfork = 0;
951} 1460}
952 1461
… …
974} 1483}
975 1484
976void 1485void
977ev_loop_fork (EV_P) 1486ev_loop_fork (EV_P)
978{ 1487{
979 postfork = 1; 1488 postfork = 1; /* must be in line with ev_default_fork */
980} 1489}
981
982#endif 1490#endif
983 1491
984#if EV_MULTIPLICITY 1492#if EV_MULTIPLICITY
985struct ev_loop * 1493struct ev_loop *
986ev_default_loop_init (unsigned int flags) 1494ev_default_loop_init (unsigned int flags)
987#else 1495#else
988int 1496int
989ev_default_loop (unsigned int flags) 1497ev_default_loop (unsigned int flags)
990#endif 1498#endif
991{ 1499{
992 if (sigpipe [0] == sigpipe [1])
993 if (pipe (sigpipe))
994 return 0;
995
996 if (!ev_default_loop_ptr) 1500 if (!ev_default_loop_ptr)
997 { 1501 {
998#if EV_MULTIPLICITY 1502#if EV_MULTIPLICITY
999 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1503 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1000#else 1504#else
… …
1003 1507
1004 loop_init (EV_A_ flags); 1508 loop_init (EV_A_ flags);
1005 1509
1006 if (ev_backend (EV_A)) 1510 if (ev_backend (EV_A))
1007 { 1511 {
1008 siginit (EV_A);
1009
1010#ifndef _WIN32 1512#ifndef _WIN32
1011 ev_signal_init (&childev, childcb, SIGCHLD); 1513 ev_signal_init (&childev, childcb, SIGCHLD);
1012 ev_set_priority (&childev, EV_MAXPRI); 1514 ev_set_priority (&childev, EV_MAXPRI);
1013 ev_signal_start (EV_A_ &childev); 1515 ev_signal_start (EV_A_ &childev);
1014 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1516 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1031#ifndef _WIN32 1533#ifndef _WIN32
1032 ev_ref (EV_A); /* child watcher */ 1534 ev_ref (EV_A); /* child watcher */
1033 ev_signal_stop (EV_A_ &childev); 1535 ev_signal_stop (EV_A_ &childev);
1034#endif 1536#endif
1035 1537
1036 ev_ref (EV_A); /* signal watcher */
1037 ev_io_stop (EV_A_ &sigev);
1038
1039 close (sigpipe [0]); sigpipe [0] = 0;
1040 close (sigpipe [1]); sigpipe [1] = 0;
1041
1042 loop_destroy (EV_A); 1538 loop_destroy (EV_A);
1043} 1539}
1044 1540
1045void 1541void
1046ev_default_fork (void) 1542ev_default_fork (void)
… …
1048#if EV_MULTIPLICITY 1544#if EV_MULTIPLICITY
1049 struct ev_loop *loop = ev_default_loop_ptr; 1545 struct ev_loop *loop = ev_default_loop_ptr;
1050#endif 1546#endif
1051 1547
1052 if (backend) 1548 if (backend)
1053 postfork = 1; 1549 postfork = 1; /* must be in line with ev_loop_fork */
1054} 1550}
1055 1551
1056/*****************************************************************************/ 1552/*****************************************************************************/
1057 1553
1058static int 1554void
1059any_pending (EV_P) 1555ev_invoke (EV_P_ void *w, int revents)
1060{ 1556{
1061 int pri; 1557 EV_CB_INVOKE ((W)w, revents);
1062
1063 for (pri = NUMPRI; pri--; )
1064 if (pendingcnt [pri])
1065 return 1;
1066
1067 return 0;
1068} 1558}
1069 1559
1070inline void 1560void inline_speed
1071call_pending (EV_P) 1561call_pending (EV_P)
1072{ 1562{
1073 int pri; 1563 int pri;
1074 1564
1075 for (pri = NUMPRI; pri--; ) 1565 for (pri = NUMPRI; pri--; )
… …
1077 { 1567 {
1078 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1568 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1079 1569
1080 if (expect_true (p->w)) 1570 if (expect_true (p->w))
1081 { 1571 {
1572 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1573
1082 p->w->pending = 0; 1574 p->w->pending = 0;
1083 EV_CB_INVOKE (p->w, p->events); 1575 EV_CB_INVOKE (p->w, p->events);
1084 } 1576 }
1085 } 1577 }
1086} 1578}
1087 1579
1088inline void 1580#if EV_IDLE_ENABLE
1581void inline_size
1582idle_reify (EV_P)
1583{
1584 if (expect_false (idleall))
1585 {
1586 int pri;
1587
1588 for (pri = NUMPRI; pri--; )
1589 {
1590 if (pendingcnt [pri])
1591 break;
1592
1593 if (idlecnt [pri])
1594 {
1595 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1596 break;
1597 }
1598 }
1599 }
1600}
1601#endif
1602
1603void inline_size
1089timers_reify (EV_P) 1604timers_reify (EV_P)
1090{ 1605{
1091 while (timercnt && ((WT)timers [0])->at <= mn_now) 1606 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1092 { 1607 {
1093 struct ev_timer *w = timers [0]; 1608 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1094 1609
1095 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1610 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1096 1611
1097 /* first reschedule or stop timer */ 1612 /* first reschedule or stop timer */
1098 if (w->repeat) 1613 if (w->repeat)
1099 { 1614 {
1615 ev_at (w) += w->repeat;
1616 if (ev_at (w) < mn_now)
1617 ev_at (w) = mn_now;
1618
1100 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1619 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1101 1620
1102 ((WT)w)->at += w->repeat; 1621 ANHE_at_set (timers [HEAP0]);
1103 if (((WT)w)->at < mn_now)
1104 ((WT)w)->at = mn_now;
1105
1106 downheap ((WT *)timers, timercnt, 0); 1622 downheap (timers, timercnt, HEAP0);
1107 } 1623 }
1108 else 1624 else
1109 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1625 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1110 1626
1111 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1627 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1112 } 1628 }
1113} 1629}
1114 1630
1115#if EV_PERIODICS 1631#if EV_PERIODIC_ENABLE
1116inline void 1632void inline_size
1117periodics_reify (EV_P) 1633periodics_reify (EV_P)
1118{ 1634{
1119 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1635 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1120 { 1636 {
1121 struct ev_periodic *w = periodics [0]; 1637 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1122 1638
1123 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1639 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1124 1640
1125 /* first reschedule or stop timer */ 1641 /* first reschedule or stop timer */
1126 if (w->reschedule_cb) 1642 if (w->reschedule_cb)
1127 { 1643 {
1128 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1644 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1645
1129 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1646 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1647
1648 ANHE_at_set (periodics [HEAP0]);
1130 downheap ((WT *)periodics, periodiccnt, 0); 1649 downheap (periodics, periodiccnt, HEAP0);
1131 } 1650 }
1132 else if (w->interval) 1651 else if (w->interval)
1133 { 1652 {
1134 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1653 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1135 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1654 /* if next trigger time is not sufficiently in the future, put it there */
1655 /* this might happen because of floating point inexactness */
1656 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1657 {
1658 ev_at (w) += w->interval;
1659
1660 /* if interval is unreasonably low we might still have a time in the past */
1661 /* so correct this. this will make the periodic very inexact, but the user */
1662 /* has effectively asked to get triggered more often than possible */
1663 if (ev_at (w) < ev_rt_now)
1664 ev_at (w) = ev_rt_now;
1665 }
1666
1667 ANHE_at_set (periodics [HEAP0]);
1136 downheap ((WT *)periodics, periodiccnt, 0); 1668 downheap (periodics, periodiccnt, HEAP0);
1137 } 1669 }
1138 else 1670 else
1139 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1671 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1140 1672
1141 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1673 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1142 } 1674 }
1143} 1675}
1144 1676
1145static void 1677static void noinline
1146periodics_reschedule (EV_P) 1678periodics_reschedule (EV_P)
1147{ 1679{
1148 int i; 1680 int i;
1149 1681
1150 /* adjust periodics after time jump */ 1682 /* adjust periodics after time jump */
1683 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1684 {
1685 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1686
1687 if (w->reschedule_cb)
1688 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1689 else if (w->interval)
1690 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1691
1692 ANHE_at_set (periodics [i]);
1693 }
1694
1695 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
1696 /* also, this is easy and corretc for both 2-heaps and 4-heaps */
1151 for (i = 0; i < periodiccnt; ++i) 1697 for (i = 0; i < periodiccnt; ++i)
1152 { 1698 upheap (periodics, i + HEAP0);
1153 struct ev_periodic *w = periodics [i]; 1699}
1700#endif
1154 1701
1155 if (w->reschedule_cb) 1702void inline_speed
1156 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1703time_update (EV_P_ ev_tstamp max_block)
1157 else if (w->interval) 1704{
1158 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1705 int i;
1706
1707#if EV_USE_MONOTONIC
1708 if (expect_true (have_monotonic))
1159 } 1709 {
1710 ev_tstamp odiff = rtmn_diff;
1160 1711
1161 /* now rebuild the heap */
1162 for (i = periodiccnt >> 1; i--; )
1163 downheap ((WT *)periodics, periodiccnt, i);
1164}
1165#endif
1166
1167inline int
1168time_update_monotonic (EV_P)
1169{
1170 mn_now = get_clock (); 1712 mn_now = get_clock ();
1171 1713
1714 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1715 /* interpolate in the meantime */
1172 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1716 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1173 { 1717 {
1174 ev_rt_now = rtmn_diff + mn_now; 1718 ev_rt_now = rtmn_diff + mn_now;
1175 return 0; 1719 return;
1176 } 1720 }
1177 else 1721
1178 {
1179 now_floor = mn_now; 1722 now_floor = mn_now;
1180 ev_rt_now = ev_time (); 1723 ev_rt_now = ev_time ();
1181 return 1;
1182 }
1183}
1184 1724
1185inline void 1725 /* loop a few times, before making important decisions.
1186time_update (EV_P) 1726 * on the choice of "4": one iteration isn't enough,
1187{ 1727 * in case we get preempted during the calls to
1188 int i; 1728 * ev_time and get_clock. a second call is almost guaranteed
1189 1729 * to succeed in that case, though. and looping a few more times
1190#if EV_USE_MONOTONIC 1730 * doesn't hurt either as we only do this on time-jumps or
1191 if (expect_true (have_monotonic)) 1731 * in the unlikely event of having been preempted here.
1192 { 1732 */
1193 if (time_update_monotonic (EV_A)) 1733 for (i = 4; --i; )
1194 { 1734 {
1195 ev_tstamp odiff = rtmn_diff; 1735 rtmn_diff = ev_rt_now - mn_now;
1196 1736
1197 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1737 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1738 return; /* all is well */
1739
1740 ev_rt_now = ev_time ();
1741 mn_now = get_clock ();
1742 now_floor = mn_now;
1743 }
1744
1745# if EV_PERIODIC_ENABLE
1746 periodics_reschedule (EV_A);
1747# endif
1748 /* no timer adjustment, as the monotonic clock doesn't jump */
1749 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1750 }
1751 else
1752#endif
1753 {
1754 ev_rt_now = ev_time ();
1755
1756 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1757 {
1758#if EV_PERIODIC_ENABLE
1759 periodics_reschedule (EV_A);
1760#endif
1761 /* adjust timers. this is easy, as the offset is the same for all of them */
1762 for (i = 0; i < timercnt; ++i)
1198 { 1763 {
1199 rtmn_diff = ev_rt_now - mn_now; 1764 ANHE *he = timers + i + HEAP0;
1200 1765 ANHE_w (*he)->at += ev_rt_now - mn_now;
1201 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1766 ANHE_at_set (*he);
1202 return; /* all is well */
1203
1204 ev_rt_now = ev_time ();
1205 mn_now = get_clock ();
1206 now_floor = mn_now;
1207 } 1767 }
1208
1209# if EV_PERIODICS
1210 periodics_reschedule (EV_A);
1211# endif
1212 /* no timer adjustment, as the monotonic clock doesn't jump */
1213 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1214 } 1768 }
1215 }
1216 else
1217#endif
1218 {
1219 ev_rt_now = ev_time ();
1220
1221 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1222 {
1223#if EV_PERIODICS
1224 periodics_reschedule (EV_A);
1225#endif
1226
1227 /* adjust timers. this is easy, as the offset is the same for all */
1228 for (i = 0; i < timercnt; ++i)
1229 ((WT)timers [i])->at += ev_rt_now - mn_now;
1230 }
1231 1769
1232 mn_now = ev_rt_now; 1770 mn_now = ev_rt_now;
1233 } 1771 }
1234} 1772}
1235 1773
… …
1248static int loop_done; 1786static int loop_done;
1249 1787
1250void 1788void
1251ev_loop (EV_P_ int flags) 1789ev_loop (EV_P_ int flags)
1252{ 1790{
1253 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1791 loop_done = EVUNLOOP_CANCEL;
1254 ? EVUNLOOP_ONE
1255 : EVUNLOOP_CANCEL;
1256 1792
1257 while (activecnt) 1793 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1794
1795 do
1258 { 1796 {
1797#ifndef _WIN32
1798 if (expect_false (curpid)) /* penalise the forking check even more */
1799 if (expect_false (getpid () != curpid))
1800 {
1801 curpid = getpid ();
1802 postfork = 1;
1803 }
1804#endif
1805
1806#if EV_FORK_ENABLE
1807 /* we might have forked, so queue fork handlers */
1808 if (expect_false (postfork))
1809 if (forkcnt)
1810 {
1811 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1812 call_pending (EV_A);
1813 }
1814#endif
1815
1259 /* queue check watchers (and execute them) */ 1816 /* queue prepare watchers (and execute them) */
1260 if (expect_false (preparecnt)) 1817 if (expect_false (preparecnt))
1261 { 1818 {
1262 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1819 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1263 call_pending (EV_A); 1820 call_pending (EV_A);
1264 } 1821 }
1265 1822
1823 if (expect_false (!activecnt))
1824 break;
1825
1266 /* we might have forked, so reify kernel state if necessary */ 1826 /* we might have forked, so reify kernel state if necessary */
1267 if (expect_false (postfork)) 1827 if (expect_false (postfork))
1268 loop_fork (EV_A); 1828 loop_fork (EV_A);
1269 1829
1270 /* update fd-related kernel structures */ 1830 /* update fd-related kernel structures */
1271 fd_reify (EV_A); 1831 fd_reify (EV_A);
1272 1832
1273 /* calculate blocking time */ 1833 /* calculate blocking time */
1274 { 1834 {
1275 double block; 1835 ev_tstamp waittime = 0.;
1836 ev_tstamp sleeptime = 0.;
1276 1837
1277 if (flags & EVLOOP_NONBLOCK || idlecnt) 1838 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1278 block = 0.; /* do not block at all */
1279 else
1280 { 1839 {
1281 /* update time to cancel out callback processing overhead */ 1840 /* update time to cancel out callback processing overhead */
1282#if EV_USE_MONOTONIC
1283 if (expect_true (have_monotonic))
1284 time_update_monotonic (EV_A); 1841 time_update (EV_A_ 1e100);
1285 else
1286#endif
1287 {
1288 ev_rt_now = ev_time ();
1289 mn_now = ev_rt_now;
1290 }
1291 1842
1292 block = MAX_BLOCKTIME; 1843 waittime = MAX_BLOCKTIME;
1293 1844
1294 if (timercnt) 1845 if (timercnt)
1295 { 1846 {
1296 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1297 if (block > to) block = to; 1848 if (waittime > to) waittime = to;
1298 } 1849 }
1299 1850
1300#if EV_PERIODICS 1851#if EV_PERIODIC_ENABLE
1301 if (periodiccnt) 1852 if (periodiccnt)
1302 { 1853 {
1303 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1854 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1304 if (block > to) block = to; 1855 if (waittime > to) waittime = to;
1305 } 1856 }
1306#endif 1857#endif
1307 1858
1308 if (expect_false (block < 0.)) block = 0.; 1859 if (expect_false (waittime < timeout_blocktime))
1860 waittime = timeout_blocktime;
1861
1862 sleeptime = waittime - backend_fudge;
1863
1864 if (expect_true (sleeptime > io_blocktime))
1865 sleeptime = io_blocktime;
1866
1867 if (sleeptime)
1868 {
1869 ev_sleep (sleeptime);
1870 waittime -= sleeptime;
1871 }
1309 } 1872 }
1310 1873
1874 ++loop_count;
1311 backend_poll (EV_A_ block); 1875 backend_poll (EV_A_ waittime);
1876
1877 /* update ev_rt_now, do magic */
1878 time_update (EV_A_ waittime + sleeptime);
1312 } 1879 }
1313
1314 /* update ev_rt_now, do magic */
1315 time_update (EV_A);
1316 1880
1317 /* queue pending timers and reschedule them */ 1881 /* queue pending timers and reschedule them */
1318 timers_reify (EV_A); /* relative timers called last */ 1882 timers_reify (EV_A); /* relative timers called last */
1319#if EV_PERIODICS 1883#if EV_PERIODIC_ENABLE
1320 periodics_reify (EV_A); /* absolute timers called first */ 1884 periodics_reify (EV_A); /* absolute timers called first */
1321#endif 1885#endif
1322 1886
1887#if EV_IDLE_ENABLE
1323 /* queue idle watchers unless io or timers are pending */ 1888 /* queue idle watchers unless other events are pending */
1324 if (idlecnt && !any_pending (EV_A)) 1889 idle_reify (EV_A);
1325 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1890#endif
1326 1891
1327 /* queue check watchers, to be executed first */ 1892 /* queue check watchers, to be executed first */
1328 if (expect_false (checkcnt)) 1893 if (expect_false (checkcnt))
1329 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1894 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1330 1895
1331 call_pending (EV_A); 1896 call_pending (EV_A);
1332
1333 if (expect_false (loop_done))
1334 break;
1335 } 1897 }
1898 while (expect_true (
1899 activecnt
1900 && !loop_done
1901 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1902 ));
1336 1903
1337 if (loop_done == EVUNLOOP_ONE) 1904 if (loop_done == EVUNLOOP_ONE)
1338 loop_done = EVUNLOOP_CANCEL; 1905 loop_done = EVUNLOOP_CANCEL;
1339} 1906}
1340 1907
… …
1344 loop_done = how; 1911 loop_done = how;
1345} 1912}
1346 1913
1347/*****************************************************************************/ 1914/*****************************************************************************/
1348 1915
1349inline void 1916void inline_size
1350wlist_add (WL *head, WL elem) 1917wlist_add (WL *head, WL elem)
1351{ 1918{
1352 elem->next = *head; 1919 elem->next = *head;
1353 *head = elem; 1920 *head = elem;
1354} 1921}
1355 1922
1356inline void 1923void inline_size
1357wlist_del (WL *head, WL elem) 1924wlist_del (WL *head, WL elem)
1358{ 1925{
1359 while (*head) 1926 while (*head)
1360 { 1927 {
1361 if (*head == elem) 1928 if (*head == elem)
… …
1366 1933
1367 head = &(*head)->next; 1934 head = &(*head)->next;
1368 } 1935 }
1369} 1936}
1370 1937
1371inline void 1938void inline_speed
1372ev_clear_pending (EV_P_ W w) 1939clear_pending (EV_P_ W w)
1373{ 1940{
1374 if (w->pending) 1941 if (w->pending)
1375 { 1942 {
1376 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1943 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1377 w->pending = 0; 1944 w->pending = 0;
1378 } 1945 }
1379} 1946}
1380 1947
1381inline void 1948int
1949ev_clear_pending (EV_P_ void *w)
1950{
1951 W w_ = (W)w;
1952 int pending = w_->pending;
1953
1954 if (expect_true (pending))
1955 {
1956 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1957 w_->pending = 0;
1958 p->w = 0;
1959 return p->events;
1960 }
1961 else
1962 return 0;
1963}
1964
1965void inline_size
1966pri_adjust (EV_P_ W w)
1967{
1968 int pri = w->priority;
1969 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1970 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1971 w->priority = pri;
1972}
1973
1974void inline_speed
1382ev_start (EV_P_ W w, int active) 1975ev_start (EV_P_ W w, int active)
1383{ 1976{
1384 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1977 pri_adjust (EV_A_ w);
1385 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1386
1387 w->active = active; 1978 w->active = active;
1388 ev_ref (EV_A); 1979 ev_ref (EV_A);
1389} 1980}
1390 1981
1391inline void 1982void inline_size
1392ev_stop (EV_P_ W w) 1983ev_stop (EV_P_ W w)
1393{ 1984{
1394 ev_unref (EV_A); 1985 ev_unref (EV_A);
1395 w->active = 0; 1986 w->active = 0;
1396} 1987}
1397 1988
1398/*****************************************************************************/ 1989/*****************************************************************************/
1399 1990
1400void 1991void noinline
1401ev_io_start (EV_P_ struct ev_io *w) 1992ev_io_start (EV_P_ ev_io *w)
1402{ 1993{
1403 int fd = w->fd; 1994 int fd = w->fd;
1404 1995
1405 if (expect_false (ev_is_active (w))) 1996 if (expect_false (ev_is_active (w)))
1406 return; 1997 return;
1407 1998
1408 assert (("ev_io_start called with negative fd", fd >= 0)); 1999 assert (("ev_io_start called with negative fd", fd >= 0));
1409 2000
1410 ev_start (EV_A_ (W)w, 1); 2001 ev_start (EV_A_ (W)w, 1);
1411 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2002 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1412 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2003 wlist_add (&anfds[fd].head, (WL)w);
1413 2004
1414 fd_change (EV_A_ fd); 2005 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2006 w->events &= ~EV_IOFDSET;
1415} 2007}
1416 2008
1417void 2009void noinline
1418ev_io_stop (EV_P_ struct ev_io *w) 2010ev_io_stop (EV_P_ ev_io *w)
1419{ 2011{
1420 ev_clear_pending (EV_A_ (W)w); 2012 clear_pending (EV_A_ (W)w);
1421 if (expect_false (!ev_is_active (w))) 2013 if (expect_false (!ev_is_active (w)))
1422 return; 2014 return;
1423 2015
1424 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2016 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1425 2017
1426 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2018 wlist_del (&anfds[w->fd].head, (WL)w);
1427 ev_stop (EV_A_ (W)w); 2019 ev_stop (EV_A_ (W)w);
1428 2020
1429 fd_change (EV_A_ w->fd); 2021 fd_change (EV_A_ w->fd, 1);
1430} 2022}
1431 2023
1432void 2024void noinline
1433ev_timer_start (EV_P_ struct ev_timer *w) 2025ev_timer_start (EV_P_ ev_timer *w)
1434{ 2026{
1435 if (expect_false (ev_is_active (w))) 2027 if (expect_false (ev_is_active (w)))
1436 return; 2028 return;
1437 2029
1438 ((WT)w)->at += mn_now; 2030 ev_at (w) += mn_now;
1439 2031
1440 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2032 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1441 2033
1442 ev_start (EV_A_ (W)w, ++timercnt); 2034 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1443 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2035 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1444 timers [timercnt - 1] = w; 2036 ANHE_w (timers [ev_active (w)]) = (WT)w;
1445 upheap ((WT *)timers, timercnt - 1); 2037 ANHE_at_set (timers [ev_active (w)]);
2038 upheap (timers, ev_active (w));
1446 2039
1447 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2040 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1448} 2041}
1449 2042
1450void 2043void noinline
1451ev_timer_stop (EV_P_ struct ev_timer *w) 2044ev_timer_stop (EV_P_ ev_timer *w)
1452{ 2045{
1453 ev_clear_pending (EV_A_ (W)w); 2046 clear_pending (EV_A_ (W)w);
1454 if (expect_false (!ev_is_active (w))) 2047 if (expect_false (!ev_is_active (w)))
1455 return; 2048 return;
1456 2049
2050 {
2051 int active = ev_active (w);
2052
1457 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2053 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1458 2054
1459 if (expect_true (((W)w)->active < timercnt--)) 2055 if (expect_true (active < timercnt + HEAP0 - 1))
1460 { 2056 {
1461 timers [((W)w)->active - 1] = timers [timercnt]; 2057 timers [active] = timers [timercnt + HEAP0 - 1];
1462 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2058 adjustheap (timers, timercnt, active);
1463 } 2059 }
1464 2060
1465 ((WT)w)->at -= mn_now; 2061 --timercnt;
2062 }
2063
2064 ev_at (w) -= mn_now;
1466 2065
1467 ev_stop (EV_A_ (W)w); 2066 ev_stop (EV_A_ (W)w);
1468} 2067}
1469 2068
1470void 2069void noinline
1471ev_timer_again (EV_P_ struct ev_timer *w) 2070ev_timer_again (EV_P_ ev_timer *w)
1472{ 2071{
1473 if (ev_is_active (w)) 2072 if (ev_is_active (w))
1474 { 2073 {
1475 if (w->repeat) 2074 if (w->repeat)
1476 { 2075 {
1477 ((WT)w)->at = mn_now + w->repeat; 2076 ev_at (w) = mn_now + w->repeat;
2077 ANHE_at_set (timers [ev_active (w)]);
1478 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2078 adjustheap (timers, timercnt, ev_active (w));
1479 } 2079 }
1480 else 2080 else
1481 ev_timer_stop (EV_A_ w); 2081 ev_timer_stop (EV_A_ w);
1482 } 2082 }
1483 else if (w->repeat) 2083 else if (w->repeat)
1484 { 2084 {
1485 w->at = w->repeat; 2085 ev_at (w) = w->repeat;
1486 ev_timer_start (EV_A_ w); 2086 ev_timer_start (EV_A_ w);
1487 } 2087 }
1488} 2088}
1489 2089
1490#if EV_PERIODICS 2090#if EV_PERIODIC_ENABLE
1491void 2091void noinline
1492ev_periodic_start (EV_P_ struct ev_periodic *w) 2092ev_periodic_start (EV_P_ ev_periodic *w)
1493{ 2093{
1494 if (expect_false (ev_is_active (w))) 2094 if (expect_false (ev_is_active (w)))
1495 return; 2095 return;
1496 2096
1497 if (w->reschedule_cb) 2097 if (w->reschedule_cb)
1498 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2098 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1499 else if (w->interval) 2099 else if (w->interval)
1500 { 2100 {
1501 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2101 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1502 /* this formula differs from the one in periodic_reify because we do not always round up */ 2102 /* this formula differs from the one in periodic_reify because we do not always round up */
1503 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2103 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1504 } 2104 }
2105 else
2106 ev_at (w) = w->offset;
1505 2107
1506 ev_start (EV_A_ (W)w, ++periodiccnt); 2108 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1507 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2109 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1508 periodics [periodiccnt - 1] = w; 2110 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1509 upheap ((WT *)periodics, periodiccnt - 1); 2111 ANHE_at_set (periodics [ev_active (w)]);
2112 upheap (periodics, ev_active (w));
1510 2113
1511 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2114 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1512} 2115}
1513 2116
1514void 2117void noinline
1515ev_periodic_stop (EV_P_ struct ev_periodic *w) 2118ev_periodic_stop (EV_P_ ev_periodic *w)
1516{ 2119{
1517 ev_clear_pending (EV_A_ (W)w); 2120 clear_pending (EV_A_ (W)w);
1518 if (expect_false (!ev_is_active (w))) 2121 if (expect_false (!ev_is_active (w)))
1519 return; 2122 return;
1520 2123
2124 {
2125 int active = ev_active (w);
2126
1521 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2127 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1522 2128
1523 if (expect_true (((W)w)->active < periodiccnt--)) 2129 if (expect_true (active < periodiccnt + HEAP0 - 1))
1524 { 2130 {
1525 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2131 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1526 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2132 adjustheap (periodics, periodiccnt, active);
1527 } 2133 }
2134
2135 --periodiccnt;
2136 }
1528 2137
1529 ev_stop (EV_A_ (W)w); 2138 ev_stop (EV_A_ (W)w);
1530} 2139}
1531 2140
1532void 2141void noinline
1533ev_periodic_again (EV_P_ struct ev_periodic *w) 2142ev_periodic_again (EV_P_ ev_periodic *w)
1534{ 2143{
1535 /* TODO: use adjustheap and recalculation */ 2144 /* TODO: use adjustheap and recalculation */
1536 ev_periodic_stop (EV_A_ w); 2145 ev_periodic_stop (EV_A_ w);
1537 ev_periodic_start (EV_A_ w); 2146 ev_periodic_start (EV_A_ w);
1538} 2147}
1539#endif 2148#endif
1540 2149
1541void 2150#ifndef SA_RESTART
1542ev_idle_start (EV_P_ struct ev_idle *w) 2151# define SA_RESTART 0
2152#endif
2153
2154void noinline
2155ev_signal_start (EV_P_ ev_signal *w)
1543{ 2156{
2157#if EV_MULTIPLICITY
2158 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2159#endif
1544 if (expect_false (ev_is_active (w))) 2160 if (expect_false (ev_is_active (w)))
1545 return; 2161 return;
1546 2162
1547 ev_start (EV_A_ (W)w, ++idlecnt);
1548 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1549 idles [idlecnt - 1] = w;
1550}
1551
1552void
1553ev_idle_stop (EV_P_ struct ev_idle *w)
1554{
1555 ev_clear_pending (EV_A_ (W)w);
1556 if (expect_false (!ev_is_active (w)))
1557 return;
1558
1559 idles [((W)w)->active - 1] = idles [--idlecnt];
1560 ev_stop (EV_A_ (W)w);
1561}
1562
1563void
1564ev_prepare_start (EV_P_ struct ev_prepare *w)
1565{
1566 if (expect_false (ev_is_active (w)))
1567 return;
1568
1569 ev_start (EV_A_ (W)w, ++preparecnt);
1570 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1571 prepares [preparecnt - 1] = w;
1572}
1573
1574void
1575ev_prepare_stop (EV_P_ struct ev_prepare *w)
1576{
1577 ev_clear_pending (EV_A_ (W)w);
1578 if (expect_false (!ev_is_active (w)))
1579 return;
1580
1581 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1582 ev_stop (EV_A_ (W)w);
1583}
1584
1585void
1586ev_check_start (EV_P_ struct ev_check *w)
1587{
1588 if (expect_false (ev_is_active (w)))
1589 return;
1590
1591 ev_start (EV_A_ (W)w, ++checkcnt);
1592 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1593 checks [checkcnt - 1] = w;
1594}
1595
1596void
1597ev_check_stop (EV_P_ struct ev_check *w)
1598{
1599 ev_clear_pending (EV_A_ (W)w);
1600 if (expect_false (!ev_is_active (w)))
1601 return;
1602
1603 checks [((W)w)->active - 1] = checks [--checkcnt];
1604 ev_stop (EV_A_ (W)w);
1605}
1606
1607#ifndef SA_RESTART
1608# define SA_RESTART 0
1609#endif
1610
1611void
1612ev_signal_start (EV_P_ struct ev_signal *w)
1613{
1614#if EV_MULTIPLICITY
1615 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1616#endif
1617 if (expect_false (ev_is_active (w)))
1618 return;
1619
1620 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2163 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1621 2164
2165 evpipe_init (EV_A);
2166
2167 {
2168#ifndef _WIN32
2169 sigset_t full, prev;
2170 sigfillset (&full);
2171 sigprocmask (SIG_SETMASK, &full, &prev);
2172#endif
2173
2174 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2175
2176#ifndef _WIN32
2177 sigprocmask (SIG_SETMASK, &prev, 0);
2178#endif
2179 }
2180
1622 ev_start (EV_A_ (W)w, 1); 2181 ev_start (EV_A_ (W)w, 1);
1623 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1624 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2182 wlist_add (&signals [w->signum - 1].head, (WL)w);
1625 2183
1626 if (!((WL)w)->next) 2184 if (!((WL)w)->next)
1627 { 2185 {
1628#if _WIN32 2186#if _WIN32
1629 signal (w->signum, sighandler); 2187 signal (w->signum, ev_sighandler);
1630#else 2188#else
1631 struct sigaction sa; 2189 struct sigaction sa;
1632 sa.sa_handler = sighandler; 2190 sa.sa_handler = ev_sighandler;
1633 sigfillset (&sa.sa_mask); 2191 sigfillset (&sa.sa_mask);
1634 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2192 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1635 sigaction (w->signum, &sa, 0); 2193 sigaction (w->signum, &sa, 0);
1636#endif 2194#endif
1637 } 2195 }
1638} 2196}
1639 2197
1640void 2198void noinline
1641ev_signal_stop (EV_P_ struct ev_signal *w) 2199ev_signal_stop (EV_P_ ev_signal *w)
1642{ 2200{
1643 ev_clear_pending (EV_A_ (W)w); 2201 clear_pending (EV_A_ (W)w);
1644 if (expect_false (!ev_is_active (w))) 2202 if (expect_false (!ev_is_active (w)))
1645 return; 2203 return;
1646 2204
1647 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2205 wlist_del (&signals [w->signum - 1].head, (WL)w);
1648 ev_stop (EV_A_ (W)w); 2206 ev_stop (EV_A_ (W)w);
1649 2207
1650 if (!signals [w->signum - 1].head) 2208 if (!signals [w->signum - 1].head)
1651 signal (w->signum, SIG_DFL); 2209 signal (w->signum, SIG_DFL);
1652} 2210}
1653 2211
1654void 2212void
1655ev_child_start (EV_P_ struct ev_child *w) 2213ev_child_start (EV_P_ ev_child *w)
1656{ 2214{
1657#if EV_MULTIPLICITY 2215#if EV_MULTIPLICITY
1658 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2216 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1659#endif 2217#endif
1660 if (expect_false (ev_is_active (w))) 2218 if (expect_false (ev_is_active (w)))
1661 return; 2219 return;
1662 2220
1663 ev_start (EV_A_ (W)w, 1); 2221 ev_start (EV_A_ (W)w, 1);
1664 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2222 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1665} 2223}
1666 2224
1667void 2225void
1668ev_child_stop (EV_P_ struct ev_child *w) 2226ev_child_stop (EV_P_ ev_child *w)
1669{ 2227{
1670 ev_clear_pending (EV_A_ (W)w); 2228 clear_pending (EV_A_ (W)w);
1671 if (expect_false (!ev_is_active (w))) 2229 if (expect_false (!ev_is_active (w)))
1672 return; 2230 return;
1673 2231
1674 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2232 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1675 ev_stop (EV_A_ (W)w); 2233 ev_stop (EV_A_ (W)w);
1676} 2234}
1677 2235
1678#if EV_MULTIPLICITY 2236#if EV_STAT_ENABLE
2237
2238# ifdef _WIN32
2239# undef lstat
2240# define lstat(a,b) _stati64 (a,b)
2241# endif
2242
2243#define DEF_STAT_INTERVAL 5.0074891
2244#define MIN_STAT_INTERVAL 0.1074891
2245
2246static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2247
2248#if EV_USE_INOTIFY
2249# define EV_INOTIFY_BUFSIZE 8192
2250
2251static void noinline
2252infy_add (EV_P_ ev_stat *w)
2253{
2254 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);
2255
2256 if (w->wd < 0)
2257 {
2258 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2259
2260 /* monitor some parent directory for speedup hints */
2261 /* note that exceeding the hardcoded limit is not a correctness issue, */
2262 /* but an efficiency issue only */
2263 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2264 {
2265 char path [4096];
2266 strcpy (path, w->path);
2267
2268 do
2269 {
2270 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2271 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2272
2273 char *pend = strrchr (path, '/');
2274
2275 if (!pend)
2276 break; /* whoops, no '/', complain to your admin */
2277
2278 *pend = 0;
2279 w->wd = inotify_add_watch (fs_fd, path, mask);
2280 }
2281 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2282 }
2283 }
2284 else
2285 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2286
2287 if (w->wd >= 0)
2288 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2289}
2290
2291static void noinline
2292infy_del (EV_P_ ev_stat *w)
2293{
2294 int slot;
2295 int wd = w->wd;
2296
2297 if (wd < 0)
2298 return;
2299
2300 w->wd = -2;
2301 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2302 wlist_del (&fs_hash [slot].head, (WL)w);
2303
2304 /* remove this watcher, if others are watching it, they will rearm */
2305 inotify_rm_watch (fs_fd, wd);
2306}
2307
2308static void noinline
2309infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2310{
2311 if (slot < 0)
2312 /* overflow, need to check for all hahs slots */
2313 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2314 infy_wd (EV_A_ slot, wd, ev);
2315 else
2316 {
2317 WL w_;
2318
2319 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2320 {
2321 ev_stat *w = (ev_stat *)w_;
2322 w_ = w_->next; /* lets us remove this watcher and all before it */
2323
2324 if (w->wd == wd || wd == -1)
2325 {
2326 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2327 {
2328 w->wd = -1;
2329 infy_add (EV_A_ w); /* re-add, no matter what */
2330 }
2331
2332 stat_timer_cb (EV_A_ &w->timer, 0);
2333 }
2334 }
2335 }
2336}
2337
1679static void 2338static void
1680embed_cb (EV_P_ struct ev_io *io, int revents) 2339infy_cb (EV_P_ ev_io *w, int revents)
1681{ 2340{
1682 struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io)); 2341 char buf [EV_INOTIFY_BUFSIZE];
2342 struct inotify_event *ev = (struct inotify_event *)buf;
2343 int ofs;
2344 int len = read (fs_fd, buf, sizeof (buf));
1683 2345
2346 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2347 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2348}
2349
2350void inline_size
2351infy_init (EV_P)
2352{
2353 if (fs_fd != -2)
2354 return;
2355
2356 fs_fd = inotify_init ();
2357
2358 if (fs_fd >= 0)
2359 {
2360 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2361 ev_set_priority (&fs_w, EV_MAXPRI);
2362 ev_io_start (EV_A_ &fs_w);
2363 }
2364}
2365
2366void inline_size
2367infy_fork (EV_P)
2368{
2369 int slot;
2370
2371 if (fs_fd < 0)
2372 return;
2373
2374 close (fs_fd);
2375 fs_fd = inotify_init ();
2376
2377 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2378 {
2379 WL w_ = fs_hash [slot].head;
2380 fs_hash [slot].head = 0;
2381
2382 while (w_)
2383 {
2384 ev_stat *w = (ev_stat *)w_;
2385 w_ = w_->next; /* lets us add this watcher */
2386
2387 w->wd = -1;
2388
2389 if (fs_fd >= 0)
2390 infy_add (EV_A_ w); /* re-add, no matter what */
2391 else
2392 ev_timer_start (EV_A_ &w->timer);
2393 }
2394
2395 }
2396}
2397
2398#endif
2399
2400void
2401ev_stat_stat (EV_P_ ev_stat *w)
2402{
2403 if (lstat (w->path, &w->attr) < 0)
2404 w->attr.st_nlink = 0;
2405 else if (!w->attr.st_nlink)
2406 w->attr.st_nlink = 1;
2407}
2408
2409static void noinline
2410stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2411{
2412 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2413
2414 /* we copy this here each the time so that */
2415 /* prev has the old value when the callback gets invoked */
2416 w->prev = w->attr;
2417 ev_stat_stat (EV_A_ w);
2418
2419 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2420 if (
2421 w->prev.st_dev != w->attr.st_dev
2422 || w->prev.st_ino != w->attr.st_ino
2423 || w->prev.st_mode != w->attr.st_mode
2424 || w->prev.st_nlink != w->attr.st_nlink
2425 || w->prev.st_uid != w->attr.st_uid
2426 || w->prev.st_gid != w->attr.st_gid
2427 || w->prev.st_rdev != w->attr.st_rdev
2428 || w->prev.st_size != w->attr.st_size
2429 || w->prev.st_atime != w->attr.st_atime
2430 || w->prev.st_mtime != w->attr.st_mtime
2431 || w->prev.st_ctime != w->attr.st_ctime
2432 ) {
2433 #if EV_USE_INOTIFY
2434 infy_del (EV_A_ w);
2435 infy_add (EV_A_ w);
2436 ev_stat_stat (EV_A_ w); /* avoid race... */
2437 #endif
2438
1684 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2439 ev_feed_event (EV_A_ w, EV_STAT);
1685 ev_loop (w->loop, EVLOOP_NONBLOCK); 2440 }
1686} 2441}
1687 2442
1688void 2443void
1689ev_embed_start (EV_P_ struct ev_embed *w) 2444ev_stat_start (EV_P_ ev_stat *w)
1690{ 2445{
1691 if (expect_false (ev_is_active (w))) 2446 if (expect_false (ev_is_active (w)))
1692 return; 2447 return;
1693 2448
1694 { 2449 /* since we use memcmp, we need to clear any padding data etc. */
1695 struct ev_loop *loop = w->loop; 2450 memset (&w->prev, 0, sizeof (ev_statdata));
1696 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2451 memset (&w->attr, 0, sizeof (ev_statdata));
1697 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1698 }
1699 2452
2453 ev_stat_stat (EV_A_ w);
2454
2455 if (w->interval < MIN_STAT_INTERVAL)
2456 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2457
2458 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2459 ev_set_priority (&w->timer, ev_priority (w));
2460
2461#if EV_USE_INOTIFY
2462 infy_init (EV_A);
2463
2464 if (fs_fd >= 0)
2465 infy_add (EV_A_ w);
2466 else
2467#endif
1700 ev_io_start (EV_A_ &w->io); 2468 ev_timer_start (EV_A_ &w->timer);
2469
1701 ev_start (EV_A_ (W)w, 1); 2470 ev_start (EV_A_ (W)w, 1);
1702} 2471}
1703 2472
1704void 2473void
1705ev_embed_stop (EV_P_ struct ev_embed *w) 2474ev_stat_stop (EV_P_ ev_stat *w)
1706{ 2475{
1707 ev_clear_pending (EV_A_ (W)w); 2476 clear_pending (EV_A_ (W)w);
1708 if (expect_false (!ev_is_active (w))) 2477 if (expect_false (!ev_is_active (w)))
1709 return; 2478 return;
1710 2479
2480#if EV_USE_INOTIFY
2481 infy_del (EV_A_ w);
2482#endif
2483 ev_timer_stop (EV_A_ &w->timer);
2484
2485 ev_stop (EV_A_ (W)w);
2486}
2487#endif
2488
2489#if EV_IDLE_ENABLE
2490void
2491ev_idle_start (EV_P_ ev_idle *w)
2492{
2493 if (expect_false (ev_is_active (w)))
2494 return;
2495
2496 pri_adjust (EV_A_ (W)w);
2497
2498 {
2499 int active = ++idlecnt [ABSPRI (w)];
2500
2501 ++idleall;
2502 ev_start (EV_A_ (W)w, active);
2503
2504 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2505 idles [ABSPRI (w)][active - 1] = w;
2506 }
2507}
2508
2509void
2510ev_idle_stop (EV_P_ ev_idle *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 {
2517 int active = ev_active (w);
2518
2519 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2520 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2521
2522 ev_stop (EV_A_ (W)w);
2523 --idleall;
2524 }
2525}
2526#endif
2527
2528void
2529ev_prepare_start (EV_P_ ev_prepare *w)
2530{
2531 if (expect_false (ev_is_active (w)))
2532 return;
2533
2534 ev_start (EV_A_ (W)w, ++preparecnt);
2535 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2536 prepares [preparecnt - 1] = w;
2537}
2538
2539void
2540ev_prepare_stop (EV_P_ ev_prepare *w)
2541{
2542 clear_pending (EV_A_ (W)w);
2543 if (expect_false (!ev_is_active (w)))
2544 return;
2545
2546 {
2547 int active = ev_active (w);
2548
2549 prepares [active - 1] = prepares [--preparecnt];
2550 ev_active (prepares [active - 1]) = active;
2551 }
2552
2553 ev_stop (EV_A_ (W)w);
2554}
2555
2556void
2557ev_check_start (EV_P_ ev_check *w)
2558{
2559 if (expect_false (ev_is_active (w)))
2560 return;
2561
2562 ev_start (EV_A_ (W)w, ++checkcnt);
2563 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2564 checks [checkcnt - 1] = w;
2565}
2566
2567void
2568ev_check_stop (EV_P_ ev_check *w)
2569{
2570 clear_pending (EV_A_ (W)w);
2571 if (expect_false (!ev_is_active (w)))
2572 return;
2573
2574 {
2575 int active = ev_active (w);
2576
2577 checks [active - 1] = checks [--checkcnt];
2578 ev_active (checks [active - 1]) = active;
2579 }
2580
2581 ev_stop (EV_A_ (W)w);
2582}
2583
2584#if EV_EMBED_ENABLE
2585void noinline
2586ev_embed_sweep (EV_P_ ev_embed *w)
2587{
2588 ev_loop (w->other, EVLOOP_NONBLOCK);
2589}
2590
2591static void
2592embed_io_cb (EV_P_ ev_io *io, int revents)
2593{
2594 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2595
2596 if (ev_cb (w))
2597 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2598 else
2599 ev_loop (w->other, EVLOOP_NONBLOCK);
2600}
2601
2602static void
2603embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2604{
2605 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2606
2607 {
2608 struct ev_loop *loop = w->other;
2609
2610 while (fdchangecnt)
2611 {
2612 fd_reify (EV_A);
2613 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2614 }
2615 }
2616}
2617
2618#if 0
2619static void
2620embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2621{
2622 ev_idle_stop (EV_A_ idle);
2623}
2624#endif
2625
2626void
2627ev_embed_start (EV_P_ ev_embed *w)
2628{
2629 if (expect_false (ev_is_active (w)))
2630 return;
2631
2632 {
2633 struct ev_loop *loop = w->other;
2634 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2635 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2636 }
2637
2638 ev_set_priority (&w->io, ev_priority (w));
2639 ev_io_start (EV_A_ &w->io);
2640
2641 ev_prepare_init (&w->prepare, embed_prepare_cb);
2642 ev_set_priority (&w->prepare, EV_MINPRI);
2643 ev_prepare_start (EV_A_ &w->prepare);
2644
2645 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2646
2647 ev_start (EV_A_ (W)w, 1);
2648}
2649
2650void
2651ev_embed_stop (EV_P_ ev_embed *w)
2652{
2653 clear_pending (EV_A_ (W)w);
2654 if (expect_false (!ev_is_active (w)))
2655 return;
2656
1711 ev_io_stop (EV_A_ &w->io); 2657 ev_io_stop (EV_A_ &w->io);
2658 ev_prepare_stop (EV_A_ &w->prepare);
2659
1712 ev_stop (EV_A_ (W)w); 2660 ev_stop (EV_A_ (W)w);
1713} 2661}
1714#endif 2662#endif
1715 2663
2664#if EV_FORK_ENABLE
2665void
2666ev_fork_start (EV_P_ ev_fork *w)
2667{
2668 if (expect_false (ev_is_active (w)))
2669 return;
2670
2671 ev_start (EV_A_ (W)w, ++forkcnt);
2672 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2673 forks [forkcnt - 1] = w;
2674}
2675
2676void
2677ev_fork_stop (EV_P_ ev_fork *w)
2678{
2679 clear_pending (EV_A_ (W)w);
2680 if (expect_false (!ev_is_active (w)))
2681 return;
2682
2683 {
2684 int active = ev_active (w);
2685
2686 forks [active - 1] = forks [--forkcnt];
2687 ev_active (forks [active - 1]) = active;
2688 }
2689
2690 ev_stop (EV_A_ (W)w);
2691}
2692#endif
2693
2694#if EV_ASYNC_ENABLE
2695void
2696ev_async_start (EV_P_ ev_async *w)
2697{
2698 if (expect_false (ev_is_active (w)))
2699 return;
2700
2701 evpipe_init (EV_A);
2702
2703 ev_start (EV_A_ (W)w, ++asynccnt);
2704 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2705 asyncs [asynccnt - 1] = w;
2706}
2707
2708void
2709ev_async_stop (EV_P_ ev_async *w)
2710{
2711 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w)))
2713 return;
2714
2715 {
2716 int active = ev_active (w);
2717
2718 asyncs [active - 1] = asyncs [--asynccnt];
2719 ev_active (asyncs [active - 1]) = active;
2720 }
2721
2722 ev_stop (EV_A_ (W)w);
2723}
2724
2725void
2726ev_async_send (EV_P_ ev_async *w)
2727{
2728 w->sent = 1;
2729 evpipe_write (EV_A_ &gotasync);
2730}
2731#endif
2732
1716/*****************************************************************************/ 2733/*****************************************************************************/
1717 2734
1718struct ev_once 2735struct ev_once
1719{ 2736{
1720 struct ev_io io; 2737 ev_io io;
1721 struct ev_timer to; 2738 ev_timer to;
1722 void (*cb)(int revents, void *arg); 2739 void (*cb)(int revents, void *arg);
1723 void *arg; 2740 void *arg;
1724}; 2741};
1725 2742
1726static void 2743static void
… …
1735 2752
1736 cb (revents, arg); 2753 cb (revents, arg);
1737} 2754}
1738 2755
1739static void 2756static void
1740once_cb_io (EV_P_ struct ev_io *w, int revents) 2757once_cb_io (EV_P_ ev_io *w, int revents)
1741{ 2758{
1742 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2759 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1743} 2760}
1744 2761
1745static void 2762static void
1746once_cb_to (EV_P_ struct ev_timer *w, int revents) 2763once_cb_to (EV_P_ ev_timer *w, int revents)
1747{ 2764{
1748 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2765 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1749} 2766}
1750 2767
1751void 2768void
… …
1775 ev_timer_set (&once->to, timeout, 0.); 2792 ev_timer_set (&once->to, timeout, 0.);
1776 ev_timer_start (EV_A_ &once->to); 2793 ev_timer_start (EV_A_ &once->to);
1777 } 2794 }
1778} 2795}
1779 2796
2797#if EV_MULTIPLICITY
2798 #include "ev_wrap.h"
2799#endif
2800
1780#ifdef __cplusplus 2801#ifdef __cplusplus
1781} 2802}
1782#endif 2803#endif
1783 2804

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