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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.254 by root, Wed Jun 4 20:26:55 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * 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
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
30# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
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
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
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
31#endif 132#endif
32 133
33#include <math.h> 134#include <math.h>
34#include <stdlib.h> 135#include <stdlib.h>
35#include <unistd.h>
36#include <fcntl.h> 136#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 137#include <stddef.h>
39 138
40#include <stdio.h> 139#include <stdio.h>
41 140
42#include <assert.h> 141#include <assert.h>
43#include <errno.h> 142#include <errno.h>
44#include <sys/types.h> 143#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 144#include <time.h>
48 145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
163# endif
164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
49#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC 169# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
51# define EV_USE_MONOTONIC 1 170# define EV_USE_MONOTONIC 1
171# else
172# define EV_USE_MONOTONIC 0
173# endif
174#endif
175
176#ifndef EV_USE_REALTIME
177# define EV_USE_REALTIME 0
178#endif
179
180#ifndef EV_USE_NANOSLEEP
181# if _POSIX_C_SOURCE >= 199309L
182# define EV_USE_NANOSLEEP 1
183# else
184# define EV_USE_NANOSLEEP 0
52# endif 185# endif
53#endif 186#endif
54 187
55#ifndef EV_USE_SELECT 188#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 189# define EV_USE_SELECT 1
57#endif 190#endif
58 191
192#ifndef EV_USE_POLL
193# ifdef _WIN32
194# define EV_USE_POLL 0
195# else
196# define EV_USE_POLL 1
197# endif
198#endif
199
59#ifndef EV_USE_EPOLL 200#ifndef EV_USE_EPOLL
201# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
202# define EV_USE_EPOLL 1
203# else
60# define EV_USE_EPOLL 0 204# define EV_USE_EPOLL 0
61#endif 205# endif
206#endif
62 207
208#ifndef EV_USE_KQUEUE
209# define EV_USE_KQUEUE 0
210#endif
211
63#ifndef EV_USE_REALTIME 212#ifndef EV_USE_PORT
64# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 213# define EV_USE_PORT 0
214#endif
215
216#ifndef EV_USE_INOTIFY
217# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
218# define EV_USE_INOTIFY 1
219# else
220# define EV_USE_INOTIFY 0
65#endif 221# endif
222#endif
223
224#ifndef EV_PID_HASHSIZE
225# if EV_MINIMAL
226# define EV_PID_HASHSIZE 1
227# else
228# define EV_PID_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_INOTIFY_HASHSIZE
233# if EV_MINIMAL
234# define EV_INOTIFY_HASHSIZE 1
235# else
236# define EV_INOTIFY_HASHSIZE 16
237# endif
238#endif
239
240#ifndef EV_USE_EVENTFD
241# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
242# define EV_USE_EVENTFD 1
243# else
244# define EV_USE_EVENTFD 0
245# endif
246#endif
247
248#if 0 /* debugging */
249# define EV_VERIFY 3
250# define EV_USE_4HEAP 1
251# define EV_HEAP_CACHE_AT 1
252#endif
253
254#ifndef EV_VERIFY
255# define EV_VERIFY !EV_MINIMAL
256#endif
257
258#ifndef EV_USE_4HEAP
259# define EV_USE_4HEAP !EV_MINIMAL
260#endif
261
262#ifndef EV_HEAP_CACHE_AT
263# define EV_HEAP_CACHE_AT !EV_MINIMAL
264#endif
265
266/* this block fixes any misconfiguration where we know we run into trouble otherwise */
267
268#ifndef CLOCK_MONOTONIC
269# undef EV_USE_MONOTONIC
270# define EV_USE_MONOTONIC 0
271#endif
272
273#ifndef CLOCK_REALTIME
274# undef EV_USE_REALTIME
275# define EV_USE_REALTIME 0
276#endif
277
278#if !EV_STAT_ENABLE
279# undef EV_USE_INOTIFY
280# define EV_USE_INOTIFY 0
281#endif
282
283#if !EV_USE_NANOSLEEP
284# ifndef _WIN32
285# include <sys/select.h>
286# endif
287#endif
288
289#if EV_USE_INOTIFY
290# include <sys/inotify.h>
291#endif
292
293#if EV_SELECT_IS_WINSOCKET
294# include <winsock.h>
295#endif
296
297#if EV_USE_EVENTFD
298/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
299# include <stdint.h>
300# ifdef __cplusplus
301extern "C" {
302# endif
303int eventfd (unsigned int initval, int flags);
304# ifdef __cplusplus
305}
306# endif
307#endif
308
309/**/
310
311#if EV_VERIFY >= 3
312# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
313#else
314# define EV_FREQUENT_CHECK do { } while (0)
315#endif
316
317/*
318 * This is used to avoid floating point rounding problems.
319 * It is added to ev_rt_now when scheduling periodics
320 * to ensure progress, time-wise, even when rounding
321 * errors are against us.
322 * This value is good at least till the year 4000.
323 * Better solutions welcome.
324 */
325#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
66 326
67#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 327#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68#define MAX_BLOCKTIME 59.731 328#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
69#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 329/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
70 330
71#include "ev.h" 331#if __GNUC__ >= 4
332# define expect(expr,value) __builtin_expect ((expr),(value))
333# define noinline __attribute__ ((noinline))
334#else
335# define expect(expr,value) (expr)
336# define noinline
337# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
338# define inline
339# endif
340#endif
72 341
342#define expect_false(expr) expect ((expr) != 0, 0)
343#define expect_true(expr) expect ((expr) != 0, 1)
344#define inline_size static inline
345
346#if EV_MINIMAL
347# define inline_speed static noinline
348#else
349# define inline_speed static inline
350#endif
351
352#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
353#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
354
355#define EMPTY /* required for microsofts broken pseudo-c compiler */
356#define EMPTY2(a,b) /* used to suppress some warnings */
357
73typedef struct ev_watcher *W; 358typedef ev_watcher *W;
74typedef struct ev_watcher_list *WL; 359typedef ev_watcher_list *WL;
75typedef struct ev_watcher_time *WT; 360typedef ev_watcher_time *WT;
76 361
77static ev_tstamp now, diff; /* monotonic clock */ 362#define ev_active(w) ((W)(w))->active
363#define ev_at(w) ((WT)(w))->at
364
365#if EV_USE_MONOTONIC
366/* sig_atomic_t is used to avoid per-thread variables or locking but still */
367/* giving it a reasonably high chance of working on typical architetcures */
368static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
369#endif
370
371#ifdef _WIN32
372# include "ev_win32.c"
373#endif
374
375/*****************************************************************************/
376
377static void (*syserr_cb)(const char *msg);
378
379void
380ev_set_syserr_cb (void (*cb)(const char *msg))
381{
382 syserr_cb = cb;
383}
384
385static void noinline
386syserr (const char *msg)
387{
388 if (!msg)
389 msg = "(libev) system error";
390
391 if (syserr_cb)
392 syserr_cb (msg);
393 else
394 {
395 perror (msg);
396 abort ();
397 }
398}
399
400static void *
401ev_realloc_emul (void *ptr, long size)
402{
403 /* some systems, notably openbsd and darwin, fail to properly
404 * implement realloc (x, 0) (as required by both ansi c-98 and
405 * the single unix specification, so work around them here.
406 */
407
408 if (size)
409 return realloc (ptr, size);
410
411 free (ptr);
412 return 0;
413}
414
415static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
416
417void
418ev_set_allocator (void *(*cb)(void *ptr, long size))
419{
420 alloc = cb;
421}
422
423inline_speed void *
424ev_realloc (void *ptr, long size)
425{
426 ptr = alloc (ptr, size);
427
428 if (!ptr && size)
429 {
430 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
431 abort ();
432 }
433
434 return ptr;
435}
436
437#define ev_malloc(size) ev_realloc (0, (size))
438#define ev_free(ptr) ev_realloc ((ptr), 0)
439
440/*****************************************************************************/
441
442typedef struct
443{
444 WL head;
445 unsigned char events;
446 unsigned char reify;
447#if EV_SELECT_IS_WINSOCKET
448 SOCKET handle;
449#endif
450} ANFD;
451
452typedef struct
453{
454 W w;
455 int events;
456} ANPENDING;
457
458#if EV_USE_INOTIFY
459/* hash table entry per inotify-id */
460typedef struct
461{
462 WL head;
463} ANFS;
464#endif
465
466/* Heap Entry */
467#if EV_HEAP_CACHE_AT
468 typedef struct {
469 ev_tstamp at;
470 WT w;
471 } ANHE;
472
473 #define ANHE_w(he) (he).w /* access watcher, read-write */
474 #define ANHE_at(he) (he).at /* access cached at, read-only */
475 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
476#else
477 typedef WT ANHE;
478
479 #define ANHE_w(he) (he)
480 #define ANHE_at(he) (he)->at
481 #define ANHE_at_cache(he)
482#endif
483
484#if EV_MULTIPLICITY
485
486 struct ev_loop
487 {
488 ev_tstamp ev_rt_now;
489 #define ev_rt_now ((loop)->ev_rt_now)
490 #define VAR(name,decl) decl;
491 #include "ev_vars.h"
492 #undef VAR
493 };
494 #include "ev_wrap.h"
495
496 static struct ev_loop default_loop_struct;
497 struct ev_loop *ev_default_loop_ptr;
498
499#else
500
78ev_tstamp ev_now; 501 ev_tstamp ev_rt_now;
79int ev_method; 502 #define VAR(name,decl) static decl;
503 #include "ev_vars.h"
504 #undef VAR
80 505
81static int have_monotonic; /* runtime */ 506 static int ev_default_loop_ptr;
82 507
83static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 508#endif
84static void (*method_modify)(int fd, int oev, int nev);
85static void (*method_poll)(ev_tstamp timeout);
86 509
87/*****************************************************************************/ 510/*****************************************************************************/
88 511
89ev_tstamp 512ev_tstamp
90ev_time (void) 513ev_time (void)
… …
98 gettimeofday (&tv, 0); 521 gettimeofday (&tv, 0);
99 return tv.tv_sec + tv.tv_usec * 1e-6; 522 return tv.tv_sec + tv.tv_usec * 1e-6;
100#endif 523#endif
101} 524}
102 525
103static ev_tstamp 526ev_tstamp inline_size
104get_clock (void) 527get_clock (void)
105{ 528{
106#if EV_USE_MONOTONIC 529#if EV_USE_MONOTONIC
107 if (have_monotonic) 530 if (expect_true (have_monotonic))
108 { 531 {
109 struct timespec ts; 532 struct timespec ts;
110 clock_gettime (CLOCK_MONOTONIC, &ts); 533 clock_gettime (CLOCK_MONOTONIC, &ts);
111 return ts.tv_sec + ts.tv_nsec * 1e-9; 534 return ts.tv_sec + ts.tv_nsec * 1e-9;
112 } 535 }
113#endif 536#endif
114 537
115 return ev_time (); 538 return ev_time ();
116} 539}
117 540
118#define array_nextsize(n) (((n) << 1) | 4 & ~3) 541#if EV_MULTIPLICITY
119#define array_prevsize(n) (((n) >> 1) | 4 & ~3) 542ev_tstamp
543ev_now (EV_P)
544{
545 return ev_rt_now;
546}
547#endif
120 548
121#define array_needsize(base,cur,cnt,init) \ 549void
122 if ((cnt) > cur) \ 550ev_sleep (ev_tstamp delay)
123 { \ 551{
124 int newcnt = cur; \ 552 if (delay > 0.)
125 do \
126 { \
127 newcnt = array_nextsize (newcnt); \
128 } \
129 while ((cnt) > newcnt); \
130 \
131 base = realloc (base, sizeof (*base) * (newcnt)); \
132 init (base + cur, newcnt - cur); \
133 cur = newcnt; \
134 } 553 {
554#if EV_USE_NANOSLEEP
555 struct timespec ts;
556
557 ts.tv_sec = (time_t)delay;
558 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
559
560 nanosleep (&ts, 0);
561#elif defined(_WIN32)
562 Sleep ((unsigned long)(delay * 1e3));
563#else
564 struct timeval tv;
565
566 tv.tv_sec = (time_t)delay;
567 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
568
569 select (0, 0, 0, 0, &tv);
570#endif
571 }
572}
135 573
136/*****************************************************************************/ 574/*****************************************************************************/
137 575
138typedef struct 576#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
139{
140 struct ev_io *head;
141 int events;
142} ANFD;
143 577
144static ANFD *anfds; 578int inline_size
145static int anfdmax; 579array_nextsize (int elem, int cur, int cnt)
580{
581 int ncur = cur + 1;
146 582
147static void 583 do
584 ncur <<= 1;
585 while (cnt > ncur);
586
587 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
588 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
589 {
590 ncur *= elem;
591 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
592 ncur = ncur - sizeof (void *) * 4;
593 ncur /= elem;
594 }
595
596 return ncur;
597}
598
599static noinline void *
600array_realloc (int elem, void *base, int *cur, int cnt)
601{
602 *cur = array_nextsize (elem, *cur, cnt);
603 return ev_realloc (base, elem * *cur);
604}
605
606#define array_needsize(type,base,cur,cnt,init) \
607 if (expect_false ((cnt) > (cur))) \
608 { \
609 int ocur_ = (cur); \
610 (base) = (type *)array_realloc \
611 (sizeof (type), (base), &(cur), (cnt)); \
612 init ((base) + (ocur_), (cur) - ocur_); \
613 }
614
615#if 0
616#define array_slim(type,stem) \
617 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
618 { \
619 stem ## max = array_roundsize (stem ## cnt >> 1); \
620 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
621 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
622 }
623#endif
624
625#define array_free(stem, idx) \
626 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
627
628/*****************************************************************************/
629
630void noinline
631ev_feed_event (EV_P_ void *w, int revents)
632{
633 W w_ = (W)w;
634 int pri = ABSPRI (w_);
635
636 if (expect_false (w_->pending))
637 pendings [pri][w_->pending - 1].events |= revents;
638 else
639 {
640 w_->pending = ++pendingcnt [pri];
641 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
642 pendings [pri][w_->pending - 1].w = w_;
643 pendings [pri][w_->pending - 1].events = revents;
644 }
645}
646
647void inline_speed
648queue_events (EV_P_ W *events, int eventcnt, int type)
649{
650 int i;
651
652 for (i = 0; i < eventcnt; ++i)
653 ev_feed_event (EV_A_ events [i], type);
654}
655
656/*****************************************************************************/
657
658void inline_size
148anfds_init (ANFD *base, int count) 659anfds_init (ANFD *base, int count)
149{ 660{
150 while (count--) 661 while (count--)
151 { 662 {
152 base->head = 0; 663 base->head = 0;
153 base->events = EV_NONE; 664 base->events = EV_NONE;
665 base->reify = 0;
666
154 ++base; 667 ++base;
155 } 668 }
156} 669}
157 670
158typedef struct 671void inline_speed
159{
160 W w;
161 int events;
162} ANPENDING;
163
164static ANPENDING *pendings;
165static int pendingmax, pendingcnt;
166
167static void
168event (W w, int events)
169{
170 if (w->active)
171 {
172 w->pending = ++pendingcnt;
173 array_needsize (pendings, pendingmax, pendingcnt, );
174 pendings [pendingcnt - 1].w = w;
175 pendings [pendingcnt - 1].events = events;
176 }
177}
178
179static void
180queue_events (W *events, int eventcnt, int type)
181{
182 int i;
183
184 for (i = 0; i < eventcnt; ++i)
185 event (events [i], type);
186}
187
188static void
189fd_event (int fd, int events) 672fd_event (EV_P_ int fd, int revents)
190{ 673{
191 ANFD *anfd = anfds + fd; 674 ANFD *anfd = anfds + fd;
192 struct ev_io *w; 675 ev_io *w;
193 676
194 for (w = anfd->head; w; w = w->next) 677 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195 { 678 {
196 int ev = w->events & events; 679 int ev = w->events & revents;
197 680
198 if (ev) 681 if (ev)
199 event ((W)w, ev); 682 ev_feed_event (EV_A_ (W)w, ev);
200 } 683 }
201} 684}
202 685
203/*****************************************************************************/ 686void
687ev_feed_fd_event (EV_P_ int fd, int revents)
688{
689 if (fd >= 0 && fd < anfdmax)
690 fd_event (EV_A_ fd, revents);
691}
204 692
205static int *fdchanges; 693void inline_size
206static int fdchangemax, fdchangecnt; 694fd_reify (EV_P)
207
208static void
209fd_reify (void)
210{ 695{
211 int i; 696 int i;
212 697
213 for (i = 0; i < fdchangecnt; ++i) 698 for (i = 0; i < fdchangecnt; ++i)
214 { 699 {
215 int fd = fdchanges [i]; 700 int fd = fdchanges [i];
216 ANFD *anfd = anfds + fd; 701 ANFD *anfd = anfds + fd;
217 struct ev_io *w; 702 ev_io *w;
218 703
219 int events = 0; 704 unsigned char events = 0;
220 705
221 for (w = anfd->head; w; w = w->next) 706 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222 events |= w->events; 707 events |= (unsigned char)w->events;
223 708
224 anfd->events &= ~EV_REIFY; 709#if EV_SELECT_IS_WINSOCKET
225 710 if (events)
226 if (anfd->events != events)
227 { 711 {
228 method_modify (fd, anfd->events, events); 712 unsigned long arg;
229 anfd->events = events; 713 #ifdef EV_FD_TO_WIN32_HANDLE
714 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
715 #else
716 anfd->handle = _get_osfhandle (fd);
717 #endif
718 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
230 } 719 }
720#endif
721
722 {
723 unsigned char o_events = anfd->events;
724 unsigned char o_reify = anfd->reify;
725
726 anfd->reify = 0;
727 anfd->events = events;
728
729 if (o_events != events || o_reify & EV_IOFDSET)
730 backend_modify (EV_A_ fd, o_events, events);
731 }
231 } 732 }
232 733
233 fdchangecnt = 0; 734 fdchangecnt = 0;
234} 735}
235 736
236static void 737void inline_size
237fd_change (int fd) 738fd_change (EV_P_ int fd, int flags)
238{ 739{
239 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 740 unsigned char reify = anfds [fd].reify;
240 return; 741 anfds [fd].reify |= flags;
241 742
242 anfds [fd].events |= EV_REIFY; 743 if (expect_true (!reify))
243 744 {
244 ++fdchangecnt; 745 ++fdchangecnt;
245 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 746 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246 fdchanges [fdchangecnt - 1] = fd; 747 fdchanges [fdchangecnt - 1] = fd;
748 }
749}
750
751void inline_speed
752fd_kill (EV_P_ int fd)
753{
754 ev_io *w;
755
756 while ((w = (ev_io *)anfds [fd].head))
757 {
758 ev_io_stop (EV_A_ w);
759 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
760 }
761}
762
763int inline_size
764fd_valid (int fd)
765{
766#ifdef _WIN32
767 return _get_osfhandle (fd) != -1;
768#else
769 return fcntl (fd, F_GETFD) != -1;
770#endif
247} 771}
248 772
249/* called on EBADF to verify fds */ 773/* called on EBADF to verify fds */
250static void 774static void noinline
251fd_recheck (void) 775fd_ebadf (EV_P)
252{ 776{
253 int fd; 777 int fd;
254 778
255 for (fd = 0; fd < anfdmax; ++fd) 779 for (fd = 0; fd < anfdmax; ++fd)
256 if (anfds [fd].events) 780 if (anfds [fd].events)
257 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 781 if (!fd_valid (fd) && errno == EBADF)
258 while (anfds [fd].head) 782 fd_kill (EV_A_ fd);
783}
784
785/* called on ENOMEM in select/poll to kill some fds and retry */
786static void noinline
787fd_enomem (EV_P)
788{
789 int fd;
790
791 for (fd = anfdmax; fd--; )
792 if (anfds [fd].events)
259 { 793 {
260 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 794 fd_kill (EV_A_ fd);
261 ev_io_stop (anfds [fd].head); 795 return;
262 } 796 }
797}
798
799/* usually called after fork if backend needs to re-arm all fds from scratch */
800static void noinline
801fd_rearm_all (EV_P)
802{
803 int fd;
804
805 for (fd = 0; fd < anfdmax; ++fd)
806 if (anfds [fd].events)
807 {
808 anfds [fd].events = 0;
809 fd_change (EV_A_ fd, EV_IOFDSET | 1);
810 }
263} 811}
264 812
265/*****************************************************************************/ 813/*****************************************************************************/
266 814
267static struct ev_timer **timers; 815/*
268static int timermax, timercnt; 816 * the heap functions want a real array index. array index 0 uis guaranteed to not
817 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
818 * the branching factor of the d-tree.
819 */
269 820
270static struct ev_periodic **periodics; 821/*
271static int periodicmax, periodiccnt; 822 * at the moment we allow libev the luxury of two heaps,
823 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
824 * which is more cache-efficient.
825 * the difference is about 5% with 50000+ watchers.
826 */
827#if EV_USE_4HEAP
272 828
273static void 829#define DHEAP 4
274upheap (WT *timers, int k) 830#define HEAP0 (DHEAP - 1) /* index of first element in heap */
275{ 831#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
276 WT w = timers [k]; 832#define UPHEAP_DONE(p,k) ((p) == (k))
277 833
278 while (k && timers [k >> 1]->at > w->at) 834/* away from the root */
279 { 835void inline_speed
280 timers [k] = timers [k >> 1];
281 timers [k]->active = k + 1;
282 k >>= 1;
283 }
284
285 timers [k] = w;
286 timers [k]->active = k + 1;
287
288}
289
290static void
291downheap (WT *timers, int N, int k) 836downheap (ANHE *heap, int N, int k)
292{ 837{
293 WT w = timers [k]; 838 ANHE he = heap [k];
839 ANHE *E = heap + N + HEAP0;
294 840
295 while (k < (N >> 1)) 841 for (;;)
296 { 842 {
297 int j = k << 1; 843 ev_tstamp minat;
844 ANHE *minpos;
845 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
298 846
299 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 847 /* find minimum child */
848 if (expect_true (pos + DHEAP - 1 < E))
300 ++j; 849 {
301 850 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
302 if (w->at <= timers [j]->at) 851 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
852 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
854 }
855 else if (pos < E)
856 {
857 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
858 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
859 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
860 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
861 }
862 else
303 break; 863 break;
304 864
305 timers [k] = timers [j]; 865 if (ANHE_at (he) <= minat)
306 timers [k]->active = k + 1; 866 break;
867
868 heap [k] = *minpos;
869 ev_active (ANHE_w (*minpos)) = k;
870
871 k = minpos - heap;
872 }
873
874 heap [k] = he;
875 ev_active (ANHE_w (he)) = k;
876}
877
878#else /* 4HEAP */
879
880#define HEAP0 1
881#define HPARENT(k) ((k) >> 1)
882#define UPHEAP_DONE(p,k) (!(p))
883
884/* away from the root */
885void inline_speed
886downheap (ANHE *heap, int N, int k)
887{
888 ANHE he = heap [k];
889
890 for (;;)
891 {
892 int c = k << 1;
893
894 if (c > N + HEAP0 - 1)
895 break;
896
897 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
898 ? 1 : 0;
899
900 if (ANHE_at (he) <= ANHE_at (heap [c]))
901 break;
902
903 heap [k] = heap [c];
904 ev_active (ANHE_w (heap [k])) = k;
905
307 k = j; 906 k = c;
907 }
908
909 heap [k] = he;
910 ev_active (ANHE_w (he)) = k;
911}
912#endif
913
914/* towards the root */
915void inline_speed
916upheap (ANHE *heap, int k)
917{
918 ANHE he = heap [k];
919
920 for (;;)
308 } 921 {
922 int p = HPARENT (k);
309 923
310 timers [k] = w; 924 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
311 timers [k]->active = k + 1; 925 break;
926
927 heap [k] = heap [p];
928 ev_active (ANHE_w (heap [k])) = k;
929 k = p;
930 }
931
932 heap [k] = he;
933 ev_active (ANHE_w (he)) = k;
934}
935
936void inline_size
937adjustheap (ANHE *heap, int N, int k)
938{
939 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
940 upheap (heap, k);
941 else
942 downheap (heap, N, k);
943}
944
945/* rebuild the heap: this function is used only once and executed rarely */
946void inline_size
947reheap (ANHE *heap, int N)
948{
949 int i;
950
951 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
952 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
953 for (i = 0; i < N; ++i)
954 upheap (heap, i + HEAP0);
312} 955}
313 956
314/*****************************************************************************/ 957/*****************************************************************************/
315 958
316typedef struct 959typedef struct
317{ 960{
318 struct ev_signal *head; 961 WL head;
319 sig_atomic_t gotsig; 962 EV_ATOMIC_T gotsig;
320} ANSIG; 963} ANSIG;
321 964
322static ANSIG *signals; 965static ANSIG *signals;
323static int signalmax; 966static int signalmax;
324 967
325static int sigpipe [2]; 968static EV_ATOMIC_T gotsig;
326static sig_atomic_t gotsig;
327static struct ev_io sigev;
328 969
329static void 970void inline_size
330signals_init (ANSIG *base, int count) 971signals_init (ANSIG *base, int count)
331{ 972{
332 while (count--) 973 while (count--)
333 { 974 {
334 base->head = 0; 975 base->head = 0;
335 base->gotsig = 0; 976 base->gotsig = 0;
977
336 ++base; 978 ++base;
337 } 979 }
338} 980}
339 981
982/*****************************************************************************/
983
984void inline_speed
985fd_intern (int fd)
986{
987#ifdef _WIN32
988 unsigned long arg = 1;
989 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
990#else
991 fcntl (fd, F_SETFD, FD_CLOEXEC);
992 fcntl (fd, F_SETFL, O_NONBLOCK);
993#endif
994}
995
996static void noinline
997evpipe_init (EV_P)
998{
999 if (!ev_is_active (&pipeev))
1000 {
1001#if EV_USE_EVENTFD
1002 if ((evfd = eventfd (0, 0)) >= 0)
1003 {
1004 evpipe [0] = -1;
1005 fd_intern (evfd);
1006 ev_io_set (&pipeev, evfd, EV_READ);
1007 }
1008 else
1009#endif
1010 {
1011 while (pipe (evpipe))
1012 syserr ("(libev) error creating signal/async pipe");
1013
1014 fd_intern (evpipe [0]);
1015 fd_intern (evpipe [1]);
1016 ev_io_set (&pipeev, evpipe [0], EV_READ);
1017 }
1018
1019 ev_io_start (EV_A_ &pipeev);
1020 ev_unref (EV_A); /* watcher should not keep loop alive */
1021 }
1022}
1023
1024void inline_size
1025evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1026{
1027 if (!*flag)
1028 {
1029 int old_errno = errno; /* save errno because write might clobber it */
1030
1031 *flag = 1;
1032
1033#if EV_USE_EVENTFD
1034 if (evfd >= 0)
1035 {
1036 uint64_t counter = 1;
1037 write (evfd, &counter, sizeof (uint64_t));
1038 }
1039 else
1040#endif
1041 write (evpipe [1], &old_errno, 1);
1042
1043 errno = old_errno;
1044 }
1045}
1046
340static void 1047static void
1048pipecb (EV_P_ ev_io *iow, int revents)
1049{
1050#if EV_USE_EVENTFD
1051 if (evfd >= 0)
1052 {
1053 uint64_t counter;
1054 read (evfd, &counter, sizeof (uint64_t));
1055 }
1056 else
1057#endif
1058 {
1059 char dummy;
1060 read (evpipe [0], &dummy, 1);
1061 }
1062
1063 if (gotsig && ev_is_default_loop (EV_A))
1064 {
1065 int signum;
1066 gotsig = 0;
1067
1068 for (signum = signalmax; signum--; )
1069 if (signals [signum].gotsig)
1070 ev_feed_signal_event (EV_A_ signum + 1);
1071 }
1072
1073#if EV_ASYNC_ENABLE
1074 if (gotasync)
1075 {
1076 int i;
1077 gotasync = 0;
1078
1079 for (i = asynccnt; i--; )
1080 if (asyncs [i]->sent)
1081 {
1082 asyncs [i]->sent = 0;
1083 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1084 }
1085 }
1086#endif
1087}
1088
1089/*****************************************************************************/
1090
1091static void
341sighandler (int signum) 1092ev_sighandler (int signum)
342{ 1093{
1094#if EV_MULTIPLICITY
1095 struct ev_loop *loop = &default_loop_struct;
1096#endif
1097
1098#if _WIN32
1099 signal (signum, ev_sighandler);
1100#endif
1101
343 signals [signum - 1].gotsig = 1; 1102 signals [signum - 1].gotsig = 1;
344 1103 evpipe_write (EV_A_ &gotsig);
345 if (!gotsig)
346 {
347 gotsig = 1;
348 write (sigpipe [1], &gotsig, 1);
349 }
350} 1104}
351 1105
352static void 1106void noinline
353sigcb (struct ev_io *iow, int revents) 1107ev_feed_signal_event (EV_P_ int signum)
354{ 1108{
355 struct ev_signal *w; 1109 WL w;
356 int sig;
357 1110
358 gotsig = 0; 1111#if EV_MULTIPLICITY
359 read (sigpipe [0], &revents, 1); 1112 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1113#endif
360 1114
361 for (sig = signalmax; sig--; ) 1115 --signum;
362 if (signals [sig].gotsig) 1116
363 { 1117 if (signum < 0 || signum >= signalmax)
1118 return;
1119
364 signals [sig].gotsig = 0; 1120 signals [signum].gotsig = 0;
365 1121
366 for (w = signals [sig].head; w; w = w->next) 1122 for (w = signals [signum].head; w; w = w->next)
367 event ((W)w, EV_SIGNAL); 1123 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
368 }
369}
370
371static void
372siginit (void)
373{
374 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377 /* rather than sort out wether we really need nb, set it */
378 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381 ev_io_set (&sigev, sigpipe [0], EV_READ);
382 ev_io_start (&sigev);
383} 1124}
384 1125
385/*****************************************************************************/ 1126/*****************************************************************************/
386 1127
387static struct ev_idle **idles; 1128static WL childs [EV_PID_HASHSIZE];
388static int idlemax, idlecnt;
389 1129
390static struct ev_prepare **prepares; 1130#ifndef _WIN32
391static int preparemax, preparecnt;
392 1131
393static struct ev_check **checks;
394static int checkmax, checkcnt;
395
396/*****************************************************************************/
397
398static struct ev_child *childs [PID_HASHSIZE];
399static struct ev_signal childev; 1132static ev_signal childev;
1133
1134#ifndef WIFCONTINUED
1135# define WIFCONTINUED(status) 0
1136#endif
1137
1138void inline_speed
1139child_reap (EV_P_ int chain, int pid, int status)
1140{
1141 ev_child *w;
1142 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1143
1144 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1145 {
1146 if ((w->pid == pid || !w->pid)
1147 && (!traced || (w->flags & 1)))
1148 {
1149 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1150 w->rpid = pid;
1151 w->rstatus = status;
1152 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1153 }
1154 }
1155}
400 1156
401#ifndef WCONTINUED 1157#ifndef WCONTINUED
402# define WCONTINUED 0 1158# define WCONTINUED 0
403#endif 1159#endif
404 1160
405static void 1161static void
406childcb (struct ev_signal *sw, int revents) 1162childcb (EV_P_ ev_signal *sw, int revents)
407{ 1163{
408 struct ev_child *w;
409 int pid, status; 1164 int pid, status;
410 1165
1166 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1167 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1168 if (!WCONTINUED
413 if (w->pid == pid || w->pid == -1) 1169 || errno != EINVAL
414 { 1170 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415 w->status = status; 1171 return;
416 event ((W)w, EV_CHILD); 1172
417 } 1173 /* make sure we are called again until all children have been reaped */
1174 /* we need to do it this way so that the callback gets called before we continue */
1175 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1176
1177 child_reap (EV_A_ pid, pid, status);
1178 if (EV_PID_HASHSIZE > 1)
1179 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418} 1180}
1181
1182#endif
419 1183
420/*****************************************************************************/ 1184/*****************************************************************************/
421 1185
1186#if EV_USE_PORT
1187# include "ev_port.c"
1188#endif
1189#if EV_USE_KQUEUE
1190# include "ev_kqueue.c"
1191#endif
422#if EV_USE_EPOLL 1192#if EV_USE_EPOLL
423# include "ev_epoll.c" 1193# include "ev_epoll.c"
424#endif 1194#endif
1195#if EV_USE_POLL
1196# include "ev_poll.c"
1197#endif
425#if EV_USE_SELECT 1198#if EV_USE_SELECT
426# include "ev_select.c" 1199# include "ev_select.c"
427#endif 1200#endif
428 1201
429int 1202int
… …
436ev_version_minor (void) 1209ev_version_minor (void)
437{ 1210{
438 return EV_VERSION_MINOR; 1211 return EV_VERSION_MINOR;
439} 1212}
440 1213
441int ev_init (int flags) 1214/* return true if we are running with elevated privileges and should ignore env variables */
1215int inline_size
1216enable_secure (void)
442{ 1217{
443 if (!ev_method) 1218#ifdef _WIN32
1219 return 0;
1220#else
1221 return getuid () != geteuid ()
1222 || getgid () != getegid ();
1223#endif
1224}
1225
1226unsigned int
1227ev_supported_backends (void)
1228{
1229 unsigned int flags = 0;
1230
1231 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1232 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1233 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1234 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1235 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1236
1237 return flags;
1238}
1239
1240unsigned int
1241ev_recommended_backends (void)
1242{
1243 unsigned int flags = ev_supported_backends ();
1244
1245#ifndef __NetBSD__
1246 /* kqueue is borked on everything but netbsd apparently */
1247 /* it usually doesn't work correctly on anything but sockets and pipes */
1248 flags &= ~EVBACKEND_KQUEUE;
1249#endif
1250#ifdef __APPLE__
1251 // flags &= ~EVBACKEND_KQUEUE; for documentation
1252 flags &= ~EVBACKEND_POLL;
1253#endif
1254
1255 return flags;
1256}
1257
1258unsigned int
1259ev_embeddable_backends (void)
1260{
1261 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1262
1263 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1264 /* please fix it and tell me how to detect the fix */
1265 flags &= ~EVBACKEND_EPOLL;
1266
1267 return flags;
1268}
1269
1270unsigned int
1271ev_backend (EV_P)
1272{
1273 return backend;
1274}
1275
1276unsigned int
1277ev_loop_count (EV_P)
1278{
1279 return loop_count;
1280}
1281
1282void
1283ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1284{
1285 io_blocktime = interval;
1286}
1287
1288void
1289ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1290{
1291 timeout_blocktime = interval;
1292}
1293
1294static void noinline
1295loop_init (EV_P_ unsigned int flags)
1296{
1297 if (!backend)
444 { 1298 {
445#if EV_USE_MONOTONIC 1299#if EV_USE_MONOTONIC
446 { 1300 {
447 struct timespec ts; 1301 struct timespec ts;
448 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1302 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449 have_monotonic = 1; 1303 have_monotonic = 1;
450 } 1304 }
451#endif 1305#endif
452 1306
453 ev_now = ev_time (); 1307 ev_rt_now = ev_time ();
454 now = get_clock (); 1308 mn_now = get_clock ();
1309 now_floor = mn_now;
455 diff = ev_now - now; 1310 rtmn_diff = ev_rt_now - mn_now;
456 1311
457 if (pipe (sigpipe)) 1312 io_blocktime = 0.;
458 return 0; 1313 timeout_blocktime = 0.;
1314 backend = 0;
1315 backend_fd = -1;
1316 gotasync = 0;
1317#if EV_USE_INOTIFY
1318 fs_fd = -2;
1319#endif
459 1320
460 ev_method = EVMETHOD_NONE; 1321 /* pid check not overridable via env */
1322#ifndef _WIN32
1323 if (flags & EVFLAG_FORKCHECK)
1324 curpid = getpid ();
1325#endif
1326
1327 if (!(flags & EVFLAG_NOENV)
1328 && !enable_secure ()
1329 && getenv ("LIBEV_FLAGS"))
1330 flags = atoi (getenv ("LIBEV_FLAGS"));
1331
1332 if (!(flags & 0x0000ffffU))
1333 flags |= ev_recommended_backends ();
1334
1335#if EV_USE_PORT
1336 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1337#endif
1338#if EV_USE_KQUEUE
1339 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1340#endif
461#if EV_USE_EPOLL 1341#if EV_USE_EPOLL
462 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1342 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1343#endif
1344#if EV_USE_POLL
1345 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463#endif 1346#endif
464#if EV_USE_SELECT 1347#if EV_USE_SELECT
465 if (ev_method == EVMETHOD_NONE) select_init (flags); 1348 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466#endif 1349#endif
467 1350
468 if (ev_method) 1351 ev_init (&pipeev, pipecb);
1352 ev_set_priority (&pipeev, EV_MAXPRI);
1353 }
1354}
1355
1356static void noinline
1357loop_destroy (EV_P)
1358{
1359 int i;
1360
1361 if (ev_is_active (&pipeev))
1362 {
1363 ev_ref (EV_A); /* signal watcher */
1364 ev_io_stop (EV_A_ &pipeev);
1365
1366#if EV_USE_EVENTFD
1367 if (evfd >= 0)
1368 close (evfd);
1369#endif
1370
1371 if (evpipe [0] >= 0)
469 { 1372 {
470 ev_watcher_init (&sigev, sigcb); 1373 close (evpipe [0]);
471 siginit (); 1374 close (evpipe [1]);
1375 }
1376 }
472 1377
1378#if EV_USE_INOTIFY
1379 if (fs_fd >= 0)
1380 close (fs_fd);
1381#endif
1382
1383 if (backend_fd >= 0)
1384 close (backend_fd);
1385
1386#if EV_USE_PORT
1387 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1388#endif
1389#if EV_USE_KQUEUE
1390 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1391#endif
1392#if EV_USE_EPOLL
1393 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1394#endif
1395#if EV_USE_POLL
1396 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1397#endif
1398#if EV_USE_SELECT
1399 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1400#endif
1401
1402 for (i = NUMPRI; i--; )
1403 {
1404 array_free (pending, [i]);
1405#if EV_IDLE_ENABLE
1406 array_free (idle, [i]);
1407#endif
1408 }
1409
1410 ev_free (anfds); anfdmax = 0;
1411
1412 /* have to use the microsoft-never-gets-it-right macro */
1413 array_free (fdchange, EMPTY);
1414 array_free (timer, EMPTY);
1415#if EV_PERIODIC_ENABLE
1416 array_free (periodic, EMPTY);
1417#endif
1418#if EV_FORK_ENABLE
1419 array_free (fork, EMPTY);
1420#endif
1421 array_free (prepare, EMPTY);
1422 array_free (check, EMPTY);
1423#if EV_ASYNC_ENABLE
1424 array_free (async, EMPTY);
1425#endif
1426
1427 backend = 0;
1428}
1429
1430#if EV_USE_INOTIFY
1431void inline_size infy_fork (EV_P);
1432#endif
1433
1434void inline_size
1435loop_fork (EV_P)
1436{
1437#if EV_USE_PORT
1438 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1439#endif
1440#if EV_USE_KQUEUE
1441 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1442#endif
1443#if EV_USE_EPOLL
1444 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1445#endif
1446#if EV_USE_INOTIFY
1447 infy_fork (EV_A);
1448#endif
1449
1450 if (ev_is_active (&pipeev))
1451 {
1452 /* this "locks" the handlers against writing to the pipe */
1453 /* while we modify the fd vars */
1454 gotsig = 1;
1455#if EV_ASYNC_ENABLE
1456 gotasync = 1;
1457#endif
1458
1459 ev_ref (EV_A);
1460 ev_io_stop (EV_A_ &pipeev);
1461
1462#if EV_USE_EVENTFD
1463 if (evfd >= 0)
1464 close (evfd);
1465#endif
1466
1467 if (evpipe [0] >= 0)
1468 {
1469 close (evpipe [0]);
1470 close (evpipe [1]);
1471 }
1472
1473 evpipe_init (EV_A);
1474 /* now iterate over everything, in case we missed something */
1475 pipecb (EV_A_ &pipeev, EV_READ);
1476 }
1477
1478 postfork = 0;
1479}
1480
1481#if EV_MULTIPLICITY
1482
1483struct ev_loop *
1484ev_loop_new (unsigned int flags)
1485{
1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487
1488 memset (loop, 0, sizeof (struct ev_loop));
1489
1490 loop_init (EV_A_ flags);
1491
1492 if (ev_backend (EV_A))
1493 return loop;
1494
1495 return 0;
1496}
1497
1498void
1499ev_loop_destroy (EV_P)
1500{
1501 loop_destroy (EV_A);
1502 ev_free (loop);
1503}
1504
1505void
1506ev_loop_fork (EV_P)
1507{
1508 postfork = 1; /* must be in line with ev_default_fork */
1509}
1510
1511#if EV_VERIFY
1512void noinline
1513verify_watcher (EV_P_ W w)
1514{
1515 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1516
1517 if (w->pending)
1518 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1519}
1520
1521static void noinline
1522verify_heap (EV_P_ ANHE *heap, int N)
1523{
1524 int i;
1525
1526 for (i = HEAP0; i < N + HEAP0; ++i)
1527 {
1528 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1529 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1530 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1531
1532 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1533 }
1534}
1535
1536static void noinline
1537array_verify (EV_P_ W *ws, int cnt)
1538{
1539 while (cnt--)
1540 {
1541 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1542 verify_watcher (EV_A_ ws [cnt]);
1543 }
1544}
1545#endif
1546
1547void
1548ev_loop_verify (EV_P)
1549{
1550#if EV_VERIFY
1551 int i;
1552 WL w;
1553
1554 assert (activecnt >= -1);
1555
1556 assert (fdchangemax >= fdchangecnt);
1557 for (i = 0; i < fdchangecnt; ++i)
1558 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1559
1560 assert (anfdmax >= 0);
1561 for (i = 0; i < anfdmax; ++i)
1562 for (w = anfds [i].head; w; w = w->next)
1563 {
1564 verify_watcher (EV_A_ (W)w);
1565 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1566 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1567 }
1568
1569 assert (timermax >= timercnt);
1570 verify_heap (EV_A_ timers, timercnt);
1571
1572#if EV_PERIODIC_ENABLE
1573 assert (periodicmax >= periodiccnt);
1574 verify_heap (EV_A_ periodics, periodiccnt);
1575#endif
1576
1577 for (i = NUMPRI; i--; )
1578 {
1579 assert (pendingmax [i] >= pendingcnt [i]);
1580#if EV_IDLE_ENABLE
1581 assert (idleall >= 0);
1582 assert (idlemax [i] >= idlecnt [i]);
1583 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1584#endif
1585 }
1586
1587#if EV_FORK_ENABLE
1588 assert (forkmax >= forkcnt);
1589 array_verify (EV_A_ (W *)forks, forkcnt);
1590#endif
1591
1592#if EV_ASYNC_ENABLE
1593 assert (asyncmax >= asynccnt);
1594 array_verify (EV_A_ (W *)asyncs, asynccnt);
1595#endif
1596
1597 assert (preparemax >= preparecnt);
1598 array_verify (EV_A_ (W *)prepares, preparecnt);
1599
1600 assert (checkmax >= checkcnt);
1601 array_verify (EV_A_ (W *)checks, checkcnt);
1602
1603# if 0
1604 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1605 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1606# endif
1607#endif
1608}
1609
1610#endif /* multiplicity */
1611
1612#if EV_MULTIPLICITY
1613struct ev_loop *
1614ev_default_loop_init (unsigned int flags)
1615#else
1616int
1617ev_default_loop (unsigned int flags)
1618#endif
1619{
1620 if (!ev_default_loop_ptr)
1621 {
1622#if EV_MULTIPLICITY
1623 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1624#else
1625 ev_default_loop_ptr = 1;
1626#endif
1627
1628 loop_init (EV_A_ flags);
1629
1630 if (ev_backend (EV_A))
1631 {
1632#ifndef _WIN32
473 ev_signal_init (&childev, childcb, SIGCHLD); 1633 ev_signal_init (&childev, childcb, SIGCHLD);
1634 ev_set_priority (&childev, EV_MAXPRI);
474 ev_signal_start (&childev); 1635 ev_signal_start (EV_A_ &childev);
1636 ev_unref (EV_A); /* child watcher should not keep loop alive */
1637#endif
475 } 1638 }
1639 else
1640 ev_default_loop_ptr = 0;
476 } 1641 }
477 1642
478 return ev_method; 1643 return ev_default_loop_ptr;
1644}
1645
1646void
1647ev_default_destroy (void)
1648{
1649#if EV_MULTIPLICITY
1650 struct ev_loop *loop = ev_default_loop_ptr;
1651#endif
1652
1653#ifndef _WIN32
1654 ev_ref (EV_A); /* child watcher */
1655 ev_signal_stop (EV_A_ &childev);
1656#endif
1657
1658 loop_destroy (EV_A);
1659}
1660
1661void
1662ev_default_fork (void)
1663{
1664#if EV_MULTIPLICITY
1665 struct ev_loop *loop = ev_default_loop_ptr;
1666#endif
1667
1668 if (backend)
1669 postfork = 1; /* must be in line with ev_loop_fork */
479} 1670}
480 1671
481/*****************************************************************************/ 1672/*****************************************************************************/
482 1673
483void 1674void
484ev_prefork (void) 1675ev_invoke (EV_P_ void *w, int revents)
485{ 1676{
486 /* nop */ 1677 EV_CB_INVOKE ((W)w, revents);
487} 1678}
488 1679
489void 1680void inline_speed
490ev_postfork_parent (void)
491{
492 /* nop */
493}
494
495void
496ev_postfork_child (void)
497{
498#if EV_USE_EPOLL
499 if (ev_method == EVMETHOD_EPOLL)
500 epoll_postfork_child ();
501#endif
502
503 ev_io_stop (&sigev);
504 close (sigpipe [0]);
505 close (sigpipe [1]);
506 pipe (sigpipe);
507 siginit ();
508}
509
510/*****************************************************************************/
511
512static void
513call_pending (void) 1681call_pending (EV_P)
514{ 1682{
1683 int pri;
1684
1685 for (pri = NUMPRI; pri--; )
515 while (pendingcnt) 1686 while (pendingcnt [pri])
516 { 1687 {
517 ANPENDING *p = pendings + --pendingcnt; 1688 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518 1689
519 if (p->w) 1690 if (expect_true (p->w))
1691 {
1692 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1693
1694 p->w->pending = 0;
1695 EV_CB_INVOKE (p->w, p->events);
1696 EV_FREQUENT_CHECK;
1697 }
1698 }
1699}
1700
1701#if EV_IDLE_ENABLE
1702void inline_size
1703idle_reify (EV_P)
1704{
1705 if (expect_false (idleall))
1706 {
1707 int pri;
1708
1709 for (pri = NUMPRI; pri--; )
520 { 1710 {
521 p->w->pending = 0; 1711 if (pendingcnt [pri])
522 p->w->cb (p->w, p->events); 1712 break;
1713
1714 if (idlecnt [pri])
1715 {
1716 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1717 break;
1718 }
523 } 1719 }
524 } 1720 }
525} 1721}
1722#endif
526 1723
527static void 1724void inline_size
528timers_reify (void) 1725timers_reify (EV_P)
529{ 1726{
1727 EV_FREQUENT_CHECK;
1728
530 while (timercnt && timers [0]->at <= now) 1729 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
531 { 1730 {
532 struct ev_timer *w = timers [0]; 1731 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
533 1732
534 event ((W)w, EV_TIMEOUT); 1733 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
535 1734
536 /* first reschedule or stop timer */ 1735 /* first reschedule or stop timer */
537 if (w->repeat) 1736 if (w->repeat)
538 { 1737 {
539 w->at = now + w->repeat; 1738 ev_at (w) += w->repeat;
540 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1739 if (ev_at (w) < mn_now)
1740 ev_at (w) = mn_now;
1741
1742 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1743
1744 ANHE_at_cache (timers [HEAP0]);
541 downheap ((WT *)timers, timercnt, 0); 1745 downheap (timers, timercnt, HEAP0);
542 } 1746 }
543 else 1747 else
544 ev_timer_stop (w); /* nonrepeating: stop timer */ 1748 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545 }
546}
547 1749
548static void 1750 EV_FREQUENT_CHECK;
1751 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1752 }
1753}
1754
1755#if EV_PERIODIC_ENABLE
1756void inline_size
549periodics_reify (void) 1757periodics_reify (EV_P)
550{ 1758{
1759 EV_FREQUENT_CHECK;
1760
551 while (periodiccnt && periodics [0]->at <= ev_now) 1761 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
552 { 1762 {
553 struct ev_periodic *w = periodics [0]; 1763 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1764
1765 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554 1766
555 /* first reschedule or stop timer */ 1767 /* first reschedule or stop timer */
556 if (w->interval) 1768 if (w->reschedule_cb)
557 { 1769 {
558 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1770 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
559 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1771
1772 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1773
1774 ANHE_at_cache (periodics [HEAP0]);
560 downheap ((WT *)periodics, periodiccnt, 0); 1775 downheap (periodics, periodiccnt, HEAP0);
1776 }
1777 else if (w->interval)
1778 {
1779 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1780 /* if next trigger time is not sufficiently in the future, put it there */
1781 /* this might happen because of floating point inexactness */
1782 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1783 {
1784 ev_at (w) += w->interval;
1785
1786 /* if interval is unreasonably low we might still have a time in the past */
1787 /* so correct this. this will make the periodic very inexact, but the user */
1788 /* has effectively asked to get triggered more often than possible */
1789 if (ev_at (w) < ev_rt_now)
1790 ev_at (w) = ev_rt_now;
1791 }
1792
1793 ANHE_at_cache (periodics [HEAP0]);
1794 downheap (periodics, periodiccnt, HEAP0);
561 } 1795 }
562 else 1796 else
563 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1797 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564 1798
565 event ((W)w, EV_TIMEOUT); 1799 EV_FREQUENT_CHECK;
1800 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566 } 1801 }
567} 1802}
568 1803
569static void 1804static void noinline
570periodics_reschedule (ev_tstamp diff) 1805periodics_reschedule (EV_P)
571{ 1806{
572 int i; 1807 int i;
573 1808
574 /* adjust periodics after time jump */ 1809 /* adjust periodics after time jump */
575 for (i = 0; i < periodiccnt; ++i) 1810 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
576 { 1811 {
577 struct ev_periodic *w = periodics [i]; 1812 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
578 1813
1814 if (w->reschedule_cb)
1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
579 if (w->interval) 1816 else if (w->interval)
1817 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1818
1819 ANHE_at_cache (periodics [i]);
1820 }
1821
1822 reheap (periodics, periodiccnt);
1823}
1824#endif
1825
1826void inline_speed
1827time_update (EV_P_ ev_tstamp max_block)
1828{
1829 int i;
1830
1831#if EV_USE_MONOTONIC
1832 if (expect_true (have_monotonic))
1833 {
1834 ev_tstamp odiff = rtmn_diff;
1835
1836 mn_now = get_clock ();
1837
1838 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1839 /* interpolate in the meantime */
1840 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
580 { 1841 {
581 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1842 ev_rt_now = rtmn_diff + mn_now;
1843 return;
1844 }
582 1845
583 if (fabs (diff) >= 1e-4) 1846 now_floor = mn_now;
1847 ev_rt_now = ev_time ();
1848
1849 /* loop a few times, before making important decisions.
1850 * on the choice of "4": one iteration isn't enough,
1851 * in case we get preempted during the calls to
1852 * ev_time and get_clock. a second call is almost guaranteed
1853 * to succeed in that case, though. and looping a few more times
1854 * doesn't hurt either as we only do this on time-jumps or
1855 * in the unlikely event of having been preempted here.
1856 */
1857 for (i = 4; --i; )
1858 {
1859 rtmn_diff = ev_rt_now - mn_now;
1860
1861 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1862 return; /* all is well */
1863
1864 ev_rt_now = ev_time ();
1865 mn_now = get_clock ();
1866 now_floor = mn_now;
1867 }
1868
1869# if EV_PERIODIC_ENABLE
1870 periodics_reschedule (EV_A);
1871# endif
1872 /* no timer adjustment, as the monotonic clock doesn't jump */
1873 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1874 }
1875 else
1876#endif
1877 {
1878 ev_rt_now = ev_time ();
1879
1880 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1881 {
1882#if EV_PERIODIC_ENABLE
1883 periodics_reschedule (EV_A);
1884#endif
1885 /* adjust timers. this is easy, as the offset is the same for all of them */
1886 for (i = 0; i < timercnt; ++i)
584 { 1887 {
585 ev_periodic_stop (w); 1888 ANHE *he = timers + i + HEAP0;
586 ev_periodic_start (w); 1889 ANHE_w (*he)->at += ev_rt_now - mn_now;
587 1890 ANHE_at_cache (*he);
588 i = 0; /* restart loop, inefficient, but time jumps should be rare */
589 } 1891 }
590 } 1892 }
591 }
592}
593 1893
594static void 1894 mn_now = ev_rt_now;
595time_update (void)
596{
597 int i;
598
599 ev_now = ev_time ();
600
601 if (have_monotonic)
602 { 1895 }
603 ev_tstamp odiff = diff; 1896}
604 1897
605 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1898void
1899ev_ref (EV_P)
1900{
1901 ++activecnt;
1902}
1903
1904void
1905ev_unref (EV_P)
1906{
1907 --activecnt;
1908}
1909
1910static int loop_done;
1911
1912void
1913ev_loop (EV_P_ int flags)
1914{
1915 loop_done = EVUNLOOP_CANCEL;
1916
1917 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1918
1919 do
1920 {
1921#if EV_VERIFY >= 2
1922 ev_loop_verify (EV_A);
1923#endif
1924
1925#ifndef _WIN32
1926 if (expect_false (curpid)) /* penalise the forking check even more */
1927 if (expect_false (getpid () != curpid))
1928 {
1929 curpid = getpid ();
1930 postfork = 1;
1931 }
1932#endif
1933
1934#if EV_FORK_ENABLE
1935 /* we might have forked, so queue fork handlers */
1936 if (expect_false (postfork))
1937 if (forkcnt)
1938 {
1939 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1940 call_pending (EV_A);
1941 }
1942#endif
1943
1944 /* queue prepare watchers (and execute them) */
1945 if (expect_false (preparecnt))
606 { 1946 {
607 now = get_clock (); 1947 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
608 diff = ev_now - now; 1948 call_pending (EV_A);
609
610 if (fabs (odiff - diff) < MIN_TIMEJUMP)
611 return; /* all is well */
612
613 ev_now = ev_time ();
614 } 1949 }
615 1950
616 periodics_reschedule (diff - odiff); 1951 if (expect_false (!activecnt))
617 /* no timer adjustment, as the monotonic clock doesn't jump */ 1952 break;
618 }
619 else
620 {
621 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622 {
623 periodics_reschedule (ev_now - now);
624 1953
625 /* adjust timers. this is easy, as the offset is the same for all */ 1954 /* we might have forked, so reify kernel state if necessary */
626 for (i = 0; i < timercnt; ++i) 1955 if (expect_false (postfork))
627 timers [i]->at += diff; 1956 loop_fork (EV_A);
628 }
629
630 now = ev_now;
631 }
632}
633
634int ev_loop_done;
635
636void ev_loop (int flags)
637{
638 double block;
639 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640
641 do
642 {
643 /* queue check watchers (and execute them) */
644 if (preparecnt)
645 {
646 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
647 call_pending ();
648 }
649 1957
650 /* update fd-related kernel structures */ 1958 /* update fd-related kernel structures */
651 fd_reify (); 1959 fd_reify (EV_A);
652 1960
653 /* calculate blocking time */ 1961 /* calculate blocking time */
1962 {
1963 ev_tstamp waittime = 0.;
1964 ev_tstamp sleeptime = 0.;
654 1965
655 /* we only need this for !monotonic clockor timers, but as we basically 1966 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
656 always have timers, we just calculate it always */
657 ev_now = ev_time ();
658
659 if (flags & EVLOOP_NONBLOCK || idlecnt)
660 block = 0.;
661 else
662 { 1967 {
1968 /* update time to cancel out callback processing overhead */
1969 time_update (EV_A_ 1e100);
1970
663 block = MAX_BLOCKTIME; 1971 waittime = MAX_BLOCKTIME;
664 1972
665 if (timercnt) 1973 if (timercnt)
666 { 1974 {
667 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1975 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
668 if (block > to) block = to; 1976 if (waittime > to) waittime = to;
669 } 1977 }
670 1978
1979#if EV_PERIODIC_ENABLE
671 if (periodiccnt) 1980 if (periodiccnt)
672 { 1981 {
673 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1982 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
674 if (block > to) block = to; 1983 if (waittime > to) waittime = to;
675 } 1984 }
1985#endif
676 1986
677 if (block < 0.) block = 0.; 1987 if (expect_false (waittime < timeout_blocktime))
1988 waittime = timeout_blocktime;
1989
1990 sleeptime = waittime - backend_fudge;
1991
1992 if (expect_true (sleeptime > io_blocktime))
1993 sleeptime = io_blocktime;
1994
1995 if (sleeptime)
1996 {
1997 ev_sleep (sleeptime);
1998 waittime -= sleeptime;
1999 }
678 } 2000 }
679 2001
680 method_poll (block); 2002 ++loop_count;
2003 backend_poll (EV_A_ waittime);
681 2004
682 /* update ev_now, do magic */ 2005 /* update ev_rt_now, do magic */
683 time_update (); 2006 time_update (EV_A_ waittime + sleeptime);
2007 }
684 2008
685 /* queue pending timers and reschedule them */ 2009 /* queue pending timers and reschedule them */
686 timers_reify (); /* relative timers called last */ 2010 timers_reify (EV_A); /* relative timers called last */
2011#if EV_PERIODIC_ENABLE
687 periodics_reify (); /* absolute timers called first */ 2012 periodics_reify (EV_A); /* absolute timers called first */
2013#endif
688 2014
2015#if EV_IDLE_ENABLE
689 /* queue idle watchers unless io or timers are pending */ 2016 /* queue idle watchers unless other events are pending */
690 if (!pendingcnt) 2017 idle_reify (EV_A);
691 queue_events ((W *)idles, idlecnt, EV_IDLE); 2018#endif
692 2019
693 /* queue check watchers, to be executed first */ 2020 /* queue check watchers, to be executed first */
694 if (checkcnt) 2021 if (expect_false (checkcnt))
695 queue_events ((W *)checks, checkcnt, EV_CHECK); 2022 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696 2023
697 call_pending (); 2024 call_pending (EV_A);
698 } 2025 }
699 while (!ev_loop_done); 2026 while (expect_true (
2027 activecnt
2028 && !loop_done
2029 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2030 ));
700 2031
701 if (ev_loop_done != 2) 2032 if (loop_done == EVUNLOOP_ONE)
2033 loop_done = EVUNLOOP_CANCEL;
2034}
2035
2036void
2037ev_unloop (EV_P_ int how)
2038{
702 ev_loop_done = 0; 2039 loop_done = how;
703} 2040}
704 2041
705/*****************************************************************************/ 2042/*****************************************************************************/
706 2043
707static void 2044void inline_size
708wlist_add (WL *head, WL elem) 2045wlist_add (WL *head, WL elem)
709{ 2046{
710 elem->next = *head; 2047 elem->next = *head;
711 *head = elem; 2048 *head = elem;
712} 2049}
713 2050
714static void 2051void inline_size
715wlist_del (WL *head, WL elem) 2052wlist_del (WL *head, WL elem)
716{ 2053{
717 while (*head) 2054 while (*head)
718 { 2055 {
719 if (*head == elem) 2056 if (*head == elem)
… …
724 2061
725 head = &(*head)->next; 2062 head = &(*head)->next;
726 } 2063 }
727} 2064}
728 2065
729static void 2066void inline_speed
730ev_clear (W w) 2067clear_pending (EV_P_ W w)
731{ 2068{
732 if (w->pending) 2069 if (w->pending)
733 { 2070 {
734 pendings [w->pending - 1].w = 0; 2071 pendings [ABSPRI (w)][w->pending - 1].w = 0;
735 w->pending = 0; 2072 w->pending = 0;
736 } 2073 }
737} 2074}
738 2075
739static void 2076int
2077ev_clear_pending (EV_P_ void *w)
2078{
2079 W w_ = (W)w;
2080 int pending = w_->pending;
2081
2082 if (expect_true (pending))
2083 {
2084 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2085 w_->pending = 0;
2086 p->w = 0;
2087 return p->events;
2088 }
2089 else
2090 return 0;
2091}
2092
2093void inline_size
2094pri_adjust (EV_P_ W w)
2095{
2096 int pri = w->priority;
2097 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2098 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2099 w->priority = pri;
2100}
2101
2102void inline_speed
740ev_start (W w, int active) 2103ev_start (EV_P_ W w, int active)
741{ 2104{
2105 pri_adjust (EV_A_ w);
742 w->active = active; 2106 w->active = active;
2107 ev_ref (EV_A);
743} 2108}
744 2109
745static void 2110void inline_size
746ev_stop (W w) 2111ev_stop (EV_P_ W w)
747{ 2112{
2113 ev_unref (EV_A);
748 w->active = 0; 2114 w->active = 0;
749} 2115}
750 2116
751/*****************************************************************************/ 2117/*****************************************************************************/
752 2118
753void 2119void noinline
754ev_io_start (struct ev_io *w) 2120ev_io_start (EV_P_ ev_io *w)
755{ 2121{
2122 int fd = w->fd;
2123
756 if (ev_is_active (w)) 2124 if (expect_false (ev_is_active (w)))
757 return; 2125 return;
758 2126
759 int fd = w->fd; 2127 assert (("ev_io_start called with negative fd", fd >= 0));
760 2128
2129 EV_FREQUENT_CHECK;
2130
761 ev_start ((W)w, 1); 2131 ev_start (EV_A_ (W)w, 1);
762 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2132 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2133 wlist_add (&anfds[fd].head, (WL)w);
764 2134
765 fd_change (fd); 2135 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
766} 2136 w->events &= ~EV_IOFDSET;
767 2137
768void 2138 EV_FREQUENT_CHECK;
2139}
2140
2141void noinline
769ev_io_stop (struct ev_io *w) 2142ev_io_stop (EV_P_ ev_io *w)
770{ 2143{
771 ev_clear ((W)w); 2144 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 2145 if (expect_false (!ev_is_active (w)))
773 return; 2146 return;
774 2147
2148 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2149
2150 EV_FREQUENT_CHECK;
2151
775 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2152 wlist_del (&anfds[w->fd].head, (WL)w);
776 ev_stop ((W)w); 2153 ev_stop (EV_A_ (W)w);
777 2154
778 fd_change (w->fd); 2155 fd_change (EV_A_ w->fd, 1);
779}
780 2156
781void 2157 EV_FREQUENT_CHECK;
2158}
2159
2160void noinline
782ev_timer_start (struct ev_timer *w) 2161ev_timer_start (EV_P_ ev_timer *w)
783{ 2162{
784 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
785 return; 2164 return;
786 2165
787 w->at += now; 2166 ev_at (w) += mn_now;
788 2167
789 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2168 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790 2169
791 ev_start ((W)w, ++timercnt); 2170 EV_FREQUENT_CHECK;
792 array_needsize (timers, timermax, timercnt, );
793 timers [timercnt - 1] = w;
794 upheap ((WT *)timers, timercnt - 1);
795}
796 2171
797void 2172 ++timercnt;
2173 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2174 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2175 ANHE_w (timers [ev_active (w)]) = (WT)w;
2176 ANHE_at_cache (timers [ev_active (w)]);
2177 upheap (timers, ev_active (w));
2178
2179 EV_FREQUENT_CHECK;
2180
2181 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2182}
2183
2184void noinline
798ev_timer_stop (struct ev_timer *w) 2185ev_timer_stop (EV_P_ ev_timer *w)
799{ 2186{
800 ev_clear ((W)w); 2187 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 2188 if (expect_false (!ev_is_active (w)))
802 return; 2189 return;
803 2190
804 if (w->active < timercnt--) 2191 EV_FREQUENT_CHECK;
2192
2193 {
2194 int active = ev_active (w);
2195
2196 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2197
2198 --timercnt;
2199
2200 if (expect_true (active < timercnt + HEAP0))
805 { 2201 {
806 timers [w->active - 1] = timers [timercnt]; 2202 timers [active] = timers [timercnt + HEAP0];
807 downheap ((WT *)timers, timercnt, w->active - 1); 2203 adjustheap (timers, timercnt, active);
808 } 2204 }
2205 }
809 2206
810 w->at = w->repeat; 2207 EV_FREQUENT_CHECK;
811 2208
2209 ev_at (w) -= mn_now;
2210
812 ev_stop ((W)w); 2211 ev_stop (EV_A_ (W)w);
813} 2212}
814 2213
815void 2214void noinline
816ev_timer_again (struct ev_timer *w) 2215ev_timer_again (EV_P_ ev_timer *w)
817{ 2216{
2217 EV_FREQUENT_CHECK;
2218
818 if (ev_is_active (w)) 2219 if (ev_is_active (w))
819 { 2220 {
820 if (w->repeat) 2221 if (w->repeat)
821 { 2222 {
822 w->at = now + w->repeat; 2223 ev_at (w) = mn_now + w->repeat;
2224 ANHE_at_cache (timers [ev_active (w)]);
823 downheap ((WT *)timers, timercnt, w->active - 1); 2225 adjustheap (timers, timercnt, ev_active (w));
824 } 2226 }
825 else 2227 else
826 ev_timer_stop (w); 2228 ev_timer_stop (EV_A_ w);
827 } 2229 }
828 else if (w->repeat) 2230 else if (w->repeat)
2231 {
2232 ev_at (w) = w->repeat;
829 ev_timer_start (w); 2233 ev_timer_start (EV_A_ w);
830} 2234 }
831 2235
832void 2236 EV_FREQUENT_CHECK;
2237}
2238
2239#if EV_PERIODIC_ENABLE
2240void noinline
833ev_periodic_start (struct ev_periodic *w) 2241ev_periodic_start (EV_P_ ev_periodic *w)
834{ 2242{
835 if (ev_is_active (w)) 2243 if (expect_false (ev_is_active (w)))
836 return; 2244 return;
837 2245
838 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2246 if (w->reschedule_cb)
839 2247 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2248 else if (w->interval)
2249 {
2250 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840 /* this formula differs from the one in periodic_reify because we do not always round up */ 2251 /* this formula differs from the one in periodic_reify because we do not always round up */
841 if (w->interval)
842 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253 }
2254 else
2255 ev_at (w) = w->offset;
843 2256
2257 EV_FREQUENT_CHECK;
2258
2259 ++periodiccnt;
844 ev_start ((W)w, ++periodiccnt); 2260 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
845 array_needsize (periodics, periodicmax, periodiccnt, ); 2261 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
846 periodics [periodiccnt - 1] = w; 2262 ANHE_w (periodics [ev_active (w)]) = (WT)w;
847 upheap ((WT *)periodics, periodiccnt - 1); 2263 ANHE_at_cache (periodics [ev_active (w)]);
848} 2264 upheap (periodics, ev_active (w));
849 2265
850void 2266 EV_FREQUENT_CHECK;
2267
2268 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2269}
2270
2271void noinline
851ev_periodic_stop (struct ev_periodic *w) 2272ev_periodic_stop (EV_P_ ev_periodic *w)
852{ 2273{
853 ev_clear ((W)w); 2274 clear_pending (EV_A_ (W)w);
854 if (!ev_is_active (w)) 2275 if (expect_false (!ev_is_active (w)))
855 return; 2276 return;
856 2277
857 if (w->active < periodiccnt--) 2278 EV_FREQUENT_CHECK;
2279
2280 {
2281 int active = ev_active (w);
2282
2283 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2284
2285 --periodiccnt;
2286
2287 if (expect_true (active < periodiccnt + HEAP0))
858 { 2288 {
859 periodics [w->active - 1] = periodics [periodiccnt]; 2289 periodics [active] = periodics [periodiccnt + HEAP0];
860 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2290 adjustheap (periodics, periodiccnt, active);
861 } 2291 }
2292 }
862 2293
2294 EV_FREQUENT_CHECK;
2295
863 ev_stop ((W)w); 2296 ev_stop (EV_A_ (W)w);
864} 2297}
865 2298
866void 2299void noinline
2300ev_periodic_again (EV_P_ ev_periodic *w)
2301{
2302 /* TODO: use adjustheap and recalculation */
2303 ev_periodic_stop (EV_A_ w);
2304 ev_periodic_start (EV_A_ w);
2305}
2306#endif
2307
2308#ifndef SA_RESTART
2309# define SA_RESTART 0
2310#endif
2311
2312void noinline
867ev_signal_start (struct ev_signal *w) 2313ev_signal_start (EV_P_ ev_signal *w)
868{ 2314{
2315#if EV_MULTIPLICITY
2316 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317#endif
869 if (ev_is_active (w)) 2318 if (expect_false (ev_is_active (w)))
870 return; 2319 return;
871 2320
872 ev_start ((W)w, 1); 2321 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2322
2323 evpipe_init (EV_A);
2324
2325 EV_FREQUENT_CHECK;
2326
2327 {
2328#ifndef _WIN32
2329 sigset_t full, prev;
2330 sigfillset (&full);
2331 sigprocmask (SIG_SETMASK, &full, &prev);
2332#endif
2333
873 array_needsize (signals, signalmax, w->signum, signals_init); 2334 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2335
2336#ifndef _WIN32
2337 sigprocmask (SIG_SETMASK, &prev, 0);
2338#endif
2339 }
2340
2341 ev_start (EV_A_ (W)w, 1);
874 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2342 wlist_add (&signals [w->signum - 1].head, (WL)w);
875 2343
876 if (!w->next) 2344 if (!((WL)w)->next)
877 { 2345 {
2346#if _WIN32
2347 signal (w->signum, ev_sighandler);
2348#else
878 struct sigaction sa; 2349 struct sigaction sa;
879 sa.sa_handler = sighandler; 2350 sa.sa_handler = ev_sighandler;
880 sigfillset (&sa.sa_mask); 2351 sigfillset (&sa.sa_mask);
881 sa.sa_flags = 0; 2352 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882 sigaction (w->signum, &sa, 0); 2353 sigaction (w->signum, &sa, 0);
2354#endif
883 } 2355 }
884}
885 2356
886void 2357 EV_FREQUENT_CHECK;
2358}
2359
2360void noinline
887ev_signal_stop (struct ev_signal *w) 2361ev_signal_stop (EV_P_ ev_signal *w)
888{ 2362{
889 ev_clear ((W)w); 2363 clear_pending (EV_A_ (W)w);
890 if (!ev_is_active (w)) 2364 if (expect_false (!ev_is_active (w)))
891 return; 2365 return;
892 2366
2367 EV_FREQUENT_CHECK;
2368
893 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2369 wlist_del (&signals [w->signum - 1].head, (WL)w);
894 ev_stop ((W)w); 2370 ev_stop (EV_A_ (W)w);
895 2371
896 if (!signals [w->signum - 1].head) 2372 if (!signals [w->signum - 1].head)
897 signal (w->signum, SIG_DFL); 2373 signal (w->signum, SIG_DFL);
898}
899 2374
2375 EV_FREQUENT_CHECK;
2376}
2377
900void 2378void
901ev_idle_start (struct ev_idle *w) 2379ev_child_start (EV_P_ ev_child *w)
902{ 2380{
2381#if EV_MULTIPLICITY
2382 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2383#endif
903 if (ev_is_active (w)) 2384 if (expect_false (ev_is_active (w)))
904 return; 2385 return;
905 2386
906 ev_start ((W)w, ++idlecnt); 2387 EV_FREQUENT_CHECK;
907 array_needsize (idles, idlemax, idlecnt, );
908 idles [idlecnt - 1] = w;
909}
910 2388
2389 ev_start (EV_A_ (W)w, 1);
2390 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2391
2392 EV_FREQUENT_CHECK;
2393}
2394
911void 2395void
912ev_idle_stop (struct ev_idle *w) 2396ev_child_stop (EV_P_ ev_child *w)
913{ 2397{
914 ev_clear ((W)w); 2398 clear_pending (EV_A_ (W)w);
915 if (ev_is_active (w)) 2399 if (expect_false (!ev_is_active (w)))
916 return; 2400 return;
917 2401
918 idles [w->active - 1] = idles [--idlecnt]; 2402 EV_FREQUENT_CHECK;
2403
2404 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919 ev_stop ((W)w); 2405 ev_stop (EV_A_ (W)w);
920}
921 2406
922void 2407 EV_FREQUENT_CHECK;
923ev_prepare_start (struct ev_prepare *w) 2408}
2409
2410#if EV_STAT_ENABLE
2411
2412# ifdef _WIN32
2413# undef lstat
2414# define lstat(a,b) _stati64 (a,b)
2415# endif
2416
2417#define DEF_STAT_INTERVAL 5.0074891
2418#define MIN_STAT_INTERVAL 0.1074891
2419
2420static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421
2422#if EV_USE_INOTIFY
2423# define EV_INOTIFY_BUFSIZE 8192
2424
2425static void noinline
2426infy_add (EV_P_ ev_stat *w)
924{ 2427{
925 if (ev_is_active (w)) 2428 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);
2429
2430 if (w->wd < 0)
2431 {
2432 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433
2434 /* monitor some parent directory for speedup hints */
2435 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436 /* but an efficiency issue only */
2437 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 {
2439 char path [4096];
2440 strcpy (path, w->path);
2441
2442 do
2443 {
2444 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446
2447 char *pend = strrchr (path, '/');
2448
2449 if (!pend)
2450 break; /* whoops, no '/', complain to your admin */
2451
2452 *pend = 0;
2453 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 }
2455 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456 }
2457 }
2458 else
2459 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460
2461 if (w->wd >= 0)
2462 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463}
2464
2465static void noinline
2466infy_del (EV_P_ ev_stat *w)
2467{
2468 int slot;
2469 int wd = w->wd;
2470
2471 if (wd < 0)
926 return; 2472 return;
927 2473
2474 w->wd = -2;
2475 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476 wlist_del (&fs_hash [slot].head, (WL)w);
2477
2478 /* remove this watcher, if others are watching it, they will rearm */
2479 inotify_rm_watch (fs_fd, wd);
2480}
2481
2482static void noinline
2483infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484{
2485 if (slot < 0)
2486 /* overflow, need to check for all hahs slots */
2487 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488 infy_wd (EV_A_ slot, wd, ev);
2489 else
2490 {
2491 WL w_;
2492
2493 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494 {
2495 ev_stat *w = (ev_stat *)w_;
2496 w_ = w_->next; /* lets us remove this watcher and all before it */
2497
2498 if (w->wd == wd || wd == -1)
2499 {
2500 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501 {
2502 w->wd = -1;
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 }
2505
2506 stat_timer_cb (EV_A_ &w->timer, 0);
2507 }
2508 }
2509 }
2510}
2511
2512static void
2513infy_cb (EV_P_ ev_io *w, int revents)
2514{
2515 char buf [EV_INOTIFY_BUFSIZE];
2516 struct inotify_event *ev = (struct inotify_event *)buf;
2517 int ofs;
2518 int len = read (fs_fd, buf, sizeof (buf));
2519
2520 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522}
2523
2524void inline_size
2525infy_init (EV_P)
2526{
2527 if (fs_fd != -2)
2528 return;
2529
2530 fs_fd = inotify_init ();
2531
2532 if (fs_fd >= 0)
2533 {
2534 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2535 ev_set_priority (&fs_w, EV_MAXPRI);
2536 ev_io_start (EV_A_ &fs_w);
2537 }
2538}
2539
2540void inline_size
2541infy_fork (EV_P)
2542{
2543 int slot;
2544
2545 if (fs_fd < 0)
2546 return;
2547
2548 close (fs_fd);
2549 fs_fd = inotify_init ();
2550
2551 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2552 {
2553 WL w_ = fs_hash [slot].head;
2554 fs_hash [slot].head = 0;
2555
2556 while (w_)
2557 {
2558 ev_stat *w = (ev_stat *)w_;
2559 w_ = w_->next; /* lets us add this watcher */
2560
2561 w->wd = -1;
2562
2563 if (fs_fd >= 0)
2564 infy_add (EV_A_ w); /* re-add, no matter what */
2565 else
2566 ev_timer_start (EV_A_ &w->timer);
2567 }
2568
2569 }
2570}
2571
2572#endif
2573
2574void
2575ev_stat_stat (EV_P_ ev_stat *w)
2576{
2577 if (lstat (w->path, &w->attr) < 0)
2578 w->attr.st_nlink = 0;
2579 else if (!w->attr.st_nlink)
2580 w->attr.st_nlink = 1;
2581}
2582
2583static void noinline
2584stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2585{
2586 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2587
2588 /* we copy this here each the time so that */
2589 /* prev has the old value when the callback gets invoked */
2590 w->prev = w->attr;
2591 ev_stat_stat (EV_A_ w);
2592
2593 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2594 if (
2595 w->prev.st_dev != w->attr.st_dev
2596 || w->prev.st_ino != w->attr.st_ino
2597 || w->prev.st_mode != w->attr.st_mode
2598 || w->prev.st_nlink != w->attr.st_nlink
2599 || w->prev.st_uid != w->attr.st_uid
2600 || w->prev.st_gid != w->attr.st_gid
2601 || w->prev.st_rdev != w->attr.st_rdev
2602 || w->prev.st_size != w->attr.st_size
2603 || w->prev.st_atime != w->attr.st_atime
2604 || w->prev.st_mtime != w->attr.st_mtime
2605 || w->prev.st_ctime != w->attr.st_ctime
2606 ) {
2607 #if EV_USE_INOTIFY
2608 infy_del (EV_A_ w);
2609 infy_add (EV_A_ w);
2610 ev_stat_stat (EV_A_ w); /* avoid race... */
2611 #endif
2612
2613 ev_feed_event (EV_A_ w, EV_STAT);
2614 }
2615}
2616
2617void
2618ev_stat_start (EV_P_ ev_stat *w)
2619{
2620 if (expect_false (ev_is_active (w)))
2621 return;
2622
2623 /* since we use memcmp, we need to clear any padding data etc. */
2624 memset (&w->prev, 0, sizeof (ev_statdata));
2625 memset (&w->attr, 0, sizeof (ev_statdata));
2626
2627 ev_stat_stat (EV_A_ w);
2628
2629 if (w->interval < MIN_STAT_INTERVAL)
2630 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2631
2632 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2633 ev_set_priority (&w->timer, ev_priority (w));
2634
2635#if EV_USE_INOTIFY
2636 infy_init (EV_A);
2637
2638 if (fs_fd >= 0)
2639 infy_add (EV_A_ w);
2640 else
2641#endif
2642 ev_timer_start (EV_A_ &w->timer);
2643
2644 ev_start (EV_A_ (W)w, 1);
2645
2646 EV_FREQUENT_CHECK;
2647}
2648
2649void
2650ev_stat_stop (EV_P_ ev_stat *w)
2651{
2652 clear_pending (EV_A_ (W)w);
2653 if (expect_false (!ev_is_active (w)))
2654 return;
2655
2656 EV_FREQUENT_CHECK;
2657
2658#if EV_USE_INOTIFY
2659 infy_del (EV_A_ w);
2660#endif
2661 ev_timer_stop (EV_A_ &w->timer);
2662
2663 ev_stop (EV_A_ (W)w);
2664
2665 EV_FREQUENT_CHECK;
2666}
2667#endif
2668
2669#if EV_IDLE_ENABLE
2670void
2671ev_idle_start (EV_P_ ev_idle *w)
2672{
2673 if (expect_false (ev_is_active (w)))
2674 return;
2675
2676 pri_adjust (EV_A_ (W)w);
2677
2678 EV_FREQUENT_CHECK;
2679
2680 {
2681 int active = ++idlecnt [ABSPRI (w)];
2682
2683 ++idleall;
2684 ev_start (EV_A_ (W)w, active);
2685
2686 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2687 idles [ABSPRI (w)][active - 1] = w;
2688 }
2689
2690 EV_FREQUENT_CHECK;
2691}
2692
2693void
2694ev_idle_stop (EV_P_ ev_idle *w)
2695{
2696 clear_pending (EV_A_ (W)w);
2697 if (expect_false (!ev_is_active (w)))
2698 return;
2699
2700 EV_FREQUENT_CHECK;
2701
2702 {
2703 int active = ev_active (w);
2704
2705 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2706 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2707
2708 ev_stop (EV_A_ (W)w);
2709 --idleall;
2710 }
2711
2712 EV_FREQUENT_CHECK;
2713}
2714#endif
2715
2716void
2717ev_prepare_start (EV_P_ ev_prepare *w)
2718{
2719 if (expect_false (ev_is_active (w)))
2720 return;
2721
2722 EV_FREQUENT_CHECK;
2723
928 ev_start ((W)w, ++preparecnt); 2724 ev_start (EV_A_ (W)w, ++preparecnt);
929 array_needsize (prepares, preparemax, preparecnt, ); 2725 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930 prepares [preparecnt - 1] = w; 2726 prepares [preparecnt - 1] = w;
931}
932 2727
2728 EV_FREQUENT_CHECK;
2729}
2730
933void 2731void
934ev_prepare_stop (struct ev_prepare *w) 2732ev_prepare_stop (EV_P_ ev_prepare *w)
935{ 2733{
936 ev_clear ((W)w); 2734 clear_pending (EV_A_ (W)w);
937 if (ev_is_active (w)) 2735 if (expect_false (!ev_is_active (w)))
938 return; 2736 return;
939 2737
2738 EV_FREQUENT_CHECK;
2739
2740 {
2741 int active = ev_active (w);
2742
940 prepares [w->active - 1] = prepares [--preparecnt]; 2743 prepares [active - 1] = prepares [--preparecnt];
2744 ev_active (prepares [active - 1]) = active;
2745 }
2746
941 ev_stop ((W)w); 2747 ev_stop (EV_A_ (W)w);
942}
943 2748
2749 EV_FREQUENT_CHECK;
2750}
2751
944void 2752void
945ev_check_start (struct ev_check *w) 2753ev_check_start (EV_P_ ev_check *w)
946{ 2754{
947 if (ev_is_active (w)) 2755 if (expect_false (ev_is_active (w)))
948 return; 2756 return;
949 2757
2758 EV_FREQUENT_CHECK;
2759
950 ev_start ((W)w, ++checkcnt); 2760 ev_start (EV_A_ (W)w, ++checkcnt);
951 array_needsize (checks, checkmax, checkcnt, ); 2761 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952 checks [checkcnt - 1] = w; 2762 checks [checkcnt - 1] = w;
953}
954 2763
2764 EV_FREQUENT_CHECK;
2765}
2766
955void 2767void
956ev_check_stop (struct ev_check *w) 2768ev_check_stop (EV_P_ ev_check *w)
957{ 2769{
958 ev_clear ((W)w); 2770 clear_pending (EV_A_ (W)w);
959 if (ev_is_active (w)) 2771 if (expect_false (!ev_is_active (w)))
960 return; 2772 return;
961 2773
2774 EV_FREQUENT_CHECK;
2775
2776 {
2777 int active = ev_active (w);
2778
962 checks [w->active - 1] = checks [--checkcnt]; 2779 checks [active - 1] = checks [--checkcnt];
2780 ev_active (checks [active - 1]) = active;
2781 }
2782
963 ev_stop ((W)w); 2783 ev_stop (EV_A_ (W)w);
964}
965 2784
966void 2785 EV_FREQUENT_CHECK;
967ev_child_start (struct ev_child *w) 2786}
2787
2788#if EV_EMBED_ENABLE
2789void noinline
2790ev_embed_sweep (EV_P_ ev_embed *w)
968{ 2791{
2792 ev_loop (w->other, EVLOOP_NONBLOCK);
2793}
2794
2795static void
2796embed_io_cb (EV_P_ ev_io *io, int revents)
2797{
2798 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2799
969 if (ev_is_active (w)) 2800 if (ev_cb (w))
2801 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2802 else
2803 ev_loop (w->other, EVLOOP_NONBLOCK);
2804}
2805
2806static void
2807embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2808{
2809 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2810
2811 {
2812 struct ev_loop *loop = w->other;
2813
2814 while (fdchangecnt)
2815 {
2816 fd_reify (EV_A);
2817 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2818 }
2819 }
2820}
2821
2822#if 0
2823static void
2824embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2825{
2826 ev_idle_stop (EV_A_ idle);
2827}
2828#endif
2829
2830void
2831ev_embed_start (EV_P_ ev_embed *w)
2832{
2833 if (expect_false (ev_is_active (w)))
970 return; 2834 return;
971 2835
2836 {
2837 struct ev_loop *loop = w->other;
2838 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2839 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2840 }
2841
2842 EV_FREQUENT_CHECK;
2843
2844 ev_set_priority (&w->io, ev_priority (w));
2845 ev_io_start (EV_A_ &w->io);
2846
2847 ev_prepare_init (&w->prepare, embed_prepare_cb);
2848 ev_set_priority (&w->prepare, EV_MINPRI);
2849 ev_prepare_start (EV_A_ &w->prepare);
2850
2851 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2852
972 ev_start ((W)w, 1); 2853 ev_start (EV_A_ (W)w, 1);
973 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974}
975 2854
2855 EV_FREQUENT_CHECK;
2856}
2857
976void 2858void
977ev_child_stop (struct ev_child *w) 2859ev_embed_stop (EV_P_ ev_embed *w)
978{ 2860{
979 ev_clear ((W)w); 2861 clear_pending (EV_A_ (W)w);
980 if (ev_is_active (w)) 2862 if (expect_false (!ev_is_active (w)))
981 return; 2863 return;
982 2864
983 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2865 EV_FREQUENT_CHECK;
2866
2867 ev_io_stop (EV_A_ &w->io);
2868 ev_prepare_stop (EV_A_ &w->prepare);
2869
984 ev_stop ((W)w); 2870 ev_stop (EV_A_ (W)w);
2871
2872 EV_FREQUENT_CHECK;
985} 2873}
2874#endif
2875
2876#if EV_FORK_ENABLE
2877void
2878ev_fork_start (EV_P_ ev_fork *w)
2879{
2880 if (expect_false (ev_is_active (w)))
2881 return;
2882
2883 EV_FREQUENT_CHECK;
2884
2885 ev_start (EV_A_ (W)w, ++forkcnt);
2886 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2887 forks [forkcnt - 1] = w;
2888
2889 EV_FREQUENT_CHECK;
2890}
2891
2892void
2893ev_fork_stop (EV_P_ ev_fork *w)
2894{
2895 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w)))
2897 return;
2898
2899 EV_FREQUENT_CHECK;
2900
2901 {
2902 int active = ev_active (w);
2903
2904 forks [active - 1] = forks [--forkcnt];
2905 ev_active (forks [active - 1]) = active;
2906 }
2907
2908 ev_stop (EV_A_ (W)w);
2909
2910 EV_FREQUENT_CHECK;
2911}
2912#endif
2913
2914#if EV_ASYNC_ENABLE
2915void
2916ev_async_start (EV_P_ ev_async *w)
2917{
2918 if (expect_false (ev_is_active (w)))
2919 return;
2920
2921 evpipe_init (EV_A);
2922
2923 EV_FREQUENT_CHECK;
2924
2925 ev_start (EV_A_ (W)w, ++asynccnt);
2926 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2927 asyncs [asynccnt - 1] = w;
2928
2929 EV_FREQUENT_CHECK;
2930}
2931
2932void
2933ev_async_stop (EV_P_ ev_async *w)
2934{
2935 clear_pending (EV_A_ (W)w);
2936 if (expect_false (!ev_is_active (w)))
2937 return;
2938
2939 EV_FREQUENT_CHECK;
2940
2941 {
2942 int active = ev_active (w);
2943
2944 asyncs [active - 1] = asyncs [--asynccnt];
2945 ev_active (asyncs [active - 1]) = active;
2946 }
2947
2948 ev_stop (EV_A_ (W)w);
2949
2950 EV_FREQUENT_CHECK;
2951}
2952
2953void
2954ev_async_send (EV_P_ ev_async *w)
2955{
2956 w->sent = 1;
2957 evpipe_write (EV_A_ &gotasync);
2958}
2959#endif
986 2960
987/*****************************************************************************/ 2961/*****************************************************************************/
988 2962
989struct ev_once 2963struct ev_once
990{ 2964{
991 struct ev_io io; 2965 ev_io io;
992 struct ev_timer to; 2966 ev_timer to;
993 void (*cb)(int revents, void *arg); 2967 void (*cb)(int revents, void *arg);
994 void *arg; 2968 void *arg;
995}; 2969};
996 2970
997static void 2971static void
998once_cb (struct ev_once *once, int revents) 2972once_cb (EV_P_ struct ev_once *once, int revents)
999{ 2973{
1000 void (*cb)(int revents, void *arg) = once->cb; 2974 void (*cb)(int revents, void *arg) = once->cb;
1001 void *arg = once->arg; 2975 void *arg = once->arg;
1002 2976
1003 ev_io_stop (&once->io); 2977 ev_io_stop (EV_A_ &once->io);
1004 ev_timer_stop (&once->to); 2978 ev_timer_stop (EV_A_ &once->to);
1005 free (once); 2979 ev_free (once);
1006 2980
1007 cb (revents, arg); 2981 cb (revents, arg);
1008} 2982}
1009 2983
1010static void 2984static void
1011once_cb_io (struct ev_io *w, int revents) 2985once_cb_io (EV_P_ ev_io *w, int revents)
1012{ 2986{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2987 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014} 2988}
1015 2989
1016static void 2990static void
1017once_cb_to (struct ev_timer *w, int revents) 2991once_cb_to (EV_P_ ev_timer *w, int revents)
1018{ 2992{
1019 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2993 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020} 2994}
1021 2995
1022void 2996void
1023ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2997ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024{ 2998{
1025 struct ev_once *once = malloc (sizeof (struct ev_once)); 2999 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026 3000
1027 if (!once) 3001 if (expect_false (!once))
3002 {
1028 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3003 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029 else 3004 return;
1030 { 3005 }
3006
1031 once->cb = cb; 3007 once->cb = cb;
1032 once->arg = arg; 3008 once->arg = arg;
1033 3009
1034 ev_watcher_init (&once->io, once_cb_io); 3010 ev_init (&once->io, once_cb_io);
1035 if (fd >= 0) 3011 if (fd >= 0)
1036 { 3012 {
1037 ev_io_set (&once->io, fd, events); 3013 ev_io_set (&once->io, fd, events);
1038 ev_io_start (&once->io); 3014 ev_io_start (EV_A_ &once->io);
1039 } 3015 }
1040 3016
1041 ev_watcher_init (&once->to, once_cb_to); 3017 ev_init (&once->to, once_cb_to);
1042 if (timeout >= 0.) 3018 if (timeout >= 0.)
1043 { 3019 {
1044 ev_timer_set (&once->to, timeout, 0.); 3020 ev_timer_set (&once->to, timeout, 0.);
1045 ev_timer_start (&once->to); 3021 ev_timer_start (EV_A_ &once->to);
1046 }
1047 }
1048}
1049
1050/*****************************************************************************/
1051
1052#if 0
1053
1054struct ev_io wio;
1055
1056static void
1057sin_cb (struct ev_io *w, int revents)
1058{
1059 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060}
1061
1062static void
1063ocb (struct ev_timer *w, int revents)
1064{
1065 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066 ev_timer_stop (w);
1067 ev_timer_start (w);
1068}
1069
1070static void
1071scb (struct ev_signal *w, int revents)
1072{
1073 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074 ev_io_stop (&wio);
1075 ev_io_start (&wio);
1076}
1077
1078static void
1079gcb (struct ev_signal *w, int revents)
1080{
1081 fprintf (stderr, "generic %x\n", revents);
1082
1083}
1084
1085int main (void)
1086{
1087 ev_init (0);
1088
1089 ev_io_init (&wio, sin_cb, 0, EV_READ);
1090 ev_io_start (&wio);
1091
1092 struct ev_timer t[10000];
1093
1094#if 0
1095 int i;
1096 for (i = 0; i < 10000; ++i)
1097 { 3022 }
1098 struct ev_timer *w = t + i;
1099 ev_watcher_init (w, ocb, i);
1100 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101 ev_timer_start (w);
1102 if (drand48 () < 0.5)
1103 ev_timer_stop (w);
1104 }
1105#endif
1106
1107 struct ev_timer t1;
1108 ev_timer_init (&t1, ocb, 5, 10);
1109 ev_timer_start (&t1);
1110
1111 struct ev_signal sig;
1112 ev_signal_init (&sig, scb, SIGQUIT);
1113 ev_signal_start (&sig);
1114
1115 struct ev_check cw;
1116 ev_check_init (&cw, gcb);
1117 ev_check_start (&cw);
1118
1119 struct ev_idle iw;
1120 ev_idle_init (&iw, gcb);
1121 ev_idle_start (&iw);
1122
1123 ev_loop (0);
1124
1125 return 0;
1126} 3023}
1127 3024
3025#if EV_MULTIPLICITY
3026 #include "ev_wrap.h"
1128#endif 3027#endif
1129 3028
3029#ifdef __cplusplus
3030}
3031#endif
1130 3032
1131
1132

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