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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
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
51# define EV_USE_MONOTONIC 1 169# define EV_USE_MONOTONIC 0
52# endif 170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
53#endif 178#endif
54 179
55#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
57#endif 182#endif
58 183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
190#endif
191
59#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
60# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
198#endif
199
200#ifndef EV_USE_KQUEUE
201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL
242#endif
243
244#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL
246#endif
247
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249
250#ifndef CLOCK_MONOTONIC
251# undef EV_USE_MONOTONIC
252# define EV_USE_MONOTONIC 0
61#endif 253#endif
62 254
63#ifndef CLOCK_REALTIME 255#ifndef CLOCK_REALTIME
256# undef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 257# define EV_USE_REALTIME 0
65#endif 258#endif
66#ifndef EV_USE_REALTIME 259
67# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 260#if !EV_STAT_ENABLE
261# undef EV_USE_INOTIFY
262# define EV_USE_INOTIFY 0
263#endif
264
265#if !EV_USE_NANOSLEEP
266# ifndef _WIN32
267# include <sys/select.h>
68#endif 268# endif
269#endif
270
271#if EV_USE_INOTIFY
272# include <sys/inotify.h>
273#endif
274
275#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h>
277#endif
278
279#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h>
282# ifdef __cplusplus
283extern "C" {
284# endif
285int eventfd (unsigned int initval, int flags);
286# ifdef __cplusplus
287}
288# endif
289#endif
290
291/**/
292
293/*
294 * This is used to avoid floating point rounding problems.
295 * It is added to ev_rt_now when scheduling periodics
296 * to ensure progress, time-wise, even when rounding
297 * errors are against us.
298 * This value is good at least till the year 4000.
299 * Better solutions welcome.
300 */
301#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69 302
70#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 303#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 304#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 305/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74 306
75#include "ev.h" 307#if __GNUC__ >= 4
308# define expect(expr,value) __builtin_expect ((expr),(value))
309# define noinline __attribute__ ((noinline))
310#else
311# define expect(expr,value) (expr)
312# define noinline
313# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
314# define inline
315# endif
316#endif
76 317
318#define expect_false(expr) expect ((expr) != 0, 0)
319#define expect_true(expr) expect ((expr) != 0, 1)
320#define inline_size static inline
321
322#if EV_MINIMAL
323# define inline_speed static noinline
324#else
325# define inline_speed static inline
326#endif
327
328#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
329#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
330
331#define EMPTY /* required for microsofts broken pseudo-c compiler */
332#define EMPTY2(a,b) /* used to suppress some warnings */
333
77typedef struct ev_watcher *W; 334typedef ev_watcher *W;
78typedef struct ev_watcher_list *WL; 335typedef ev_watcher_list *WL;
79typedef struct ev_watcher_time *WT; 336typedef ev_watcher_time *WT;
80 337
81static ev_tstamp now, diff; /* monotonic clock */ 338#define ev_active(w) ((W)(w))->active
339#define ev_at(w) ((WT)(w))->at
340
341#if EV_USE_MONOTONIC
342/* sig_atomic_t is used to avoid per-thread variables or locking but still */
343/* giving it a reasonably high chance of working on typical architetcures */
344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
345#endif
346
347#ifdef _WIN32
348# include "ev_win32.c"
349#endif
350
351/*****************************************************************************/
352
353static void (*syserr_cb)(const char *msg);
354
355void
356ev_set_syserr_cb (void (*cb)(const char *msg))
357{
358 syserr_cb = cb;
359}
360
361static void noinline
362syserr (const char *msg)
363{
364 if (!msg)
365 msg = "(libev) system error";
366
367 if (syserr_cb)
368 syserr_cb (msg);
369 else
370 {
371 perror (msg);
372 abort ();
373 }
374}
375
376static void *
377ev_realloc_emul (void *ptr, long size)
378{
379 /* some systems, notably openbsd and darwin, fail to properly
380 * implement realloc (x, 0) (as required by both ansi c-98 and
381 * the single unix specification, so work around them here.
382 */
383
384 if (size)
385 return realloc (ptr, size);
386
387 free (ptr);
388 return 0;
389}
390
391static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
392
393void
394ev_set_allocator (void *(*cb)(void *ptr, long size))
395{
396 alloc = cb;
397}
398
399inline_speed void *
400ev_realloc (void *ptr, long size)
401{
402 ptr = alloc (ptr, size);
403
404 if (!ptr && size)
405 {
406 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
407 abort ();
408 }
409
410 return ptr;
411}
412
413#define ev_malloc(size) ev_realloc (0, (size))
414#define ev_free(ptr) ev_realloc ((ptr), 0)
415
416/*****************************************************************************/
417
418typedef struct
419{
420 WL head;
421 unsigned char events;
422 unsigned char reify;
423#if EV_SELECT_IS_WINSOCKET
424 SOCKET handle;
425#endif
426} ANFD;
427
428typedef struct
429{
430 W w;
431 int events;
432} ANPENDING;
433
434#if EV_USE_INOTIFY
435/* hash table entry per inotify-id */
436typedef struct
437{
438 WL head;
439} ANFS;
440#endif
441
442/* Heap Entry */
443#if EV_HEAP_CACHE_AT
444 typedef struct {
445 ev_tstamp at;
446 WT w;
447 } ANHE;
448
449 #define ANHE_w(he) (he).w /* access watcher, read-write */
450 #define ANHE_at(he) (he).at /* access cached at, read-only */
451 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
452#else
453 typedef WT ANHE;
454
455 #define ANHE_w(he) (he)
456 #define ANHE_at(he) (he)->at
457 #define ANHE_at_set(he)
458#endif
459
460#if EV_MULTIPLICITY
461
462 struct ev_loop
463 {
464 ev_tstamp ev_rt_now;
465 #define ev_rt_now ((loop)->ev_rt_now)
466 #define VAR(name,decl) decl;
467 #include "ev_vars.h"
468 #undef VAR
469 };
470 #include "ev_wrap.h"
471
472 static struct ev_loop default_loop_struct;
473 struct ev_loop *ev_default_loop_ptr;
474
475#else
476
82ev_tstamp ev_now; 477 ev_tstamp ev_rt_now;
83int ev_method; 478 #define VAR(name,decl) static decl;
479 #include "ev_vars.h"
480 #undef VAR
84 481
85static int have_monotonic; /* runtime */ 482 static int ev_default_loop_ptr;
86 483
87static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 484#endif
88static void (*method_modify)(int fd, int oev, int nev);
89static void (*method_poll)(ev_tstamp timeout);
90 485
91/*****************************************************************************/ 486/*****************************************************************************/
92 487
93ev_tstamp 488ev_tstamp
94ev_time (void) 489ev_time (void)
… …
102 gettimeofday (&tv, 0); 497 gettimeofday (&tv, 0);
103 return tv.tv_sec + tv.tv_usec * 1e-6; 498 return tv.tv_sec + tv.tv_usec * 1e-6;
104#endif 499#endif
105} 500}
106 501
107static ev_tstamp 502ev_tstamp inline_size
108get_clock (void) 503get_clock (void)
109{ 504{
110#if EV_USE_MONOTONIC 505#if EV_USE_MONOTONIC
111 if (have_monotonic) 506 if (expect_true (have_monotonic))
112 { 507 {
113 struct timespec ts; 508 struct timespec ts;
114 clock_gettime (CLOCK_MONOTONIC, &ts); 509 clock_gettime (CLOCK_MONOTONIC, &ts);
115 return ts.tv_sec + ts.tv_nsec * 1e-9; 510 return ts.tv_sec + ts.tv_nsec * 1e-9;
116 } 511 }
117#endif 512#endif
118 513
119 return ev_time (); 514 return ev_time ();
120} 515}
121 516
122#define array_roundsize(base,n) ((n) | 4 & ~3) 517#if EV_MULTIPLICITY
518ev_tstamp
519ev_now (EV_P)
520{
521 return ev_rt_now;
522}
523#endif
123 524
124#define array_needsize(base,cur,cnt,init) \ 525void
125 if ((cnt) > cur) \ 526ev_sleep (ev_tstamp delay)
126 { \ 527{
127 int newcnt = cur; \ 528 if (delay > 0.)
128 do \
129 { \
130 newcnt = array_roundsize (base, newcnt << 1); \
131 } \
132 while ((cnt) > newcnt); \
133 \
134 base = realloc (base, sizeof (*base) * (newcnt)); \
135 init (base + cur, newcnt - cur); \
136 cur = newcnt; \
137 } 529 {
530#if EV_USE_NANOSLEEP
531 struct timespec ts;
532
533 ts.tv_sec = (time_t)delay;
534 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
535
536 nanosleep (&ts, 0);
537#elif defined(_WIN32)
538 Sleep ((unsigned long)(delay * 1e3));
539#else
540 struct timeval tv;
541
542 tv.tv_sec = (time_t)delay;
543 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
544
545 select (0, 0, 0, 0, &tv);
546#endif
547 }
548}
138 549
139/*****************************************************************************/ 550/*****************************************************************************/
140 551
141typedef struct 552#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142{
143 struct ev_io *head;
144 int events;
145} ANFD;
146 553
147static ANFD *anfds; 554int inline_size
148static int anfdmax; 555array_nextsize (int elem, int cur, int cnt)
556{
557 int ncur = cur + 1;
149 558
150static void 559 do
560 ncur <<= 1;
561 while (cnt > ncur);
562
563 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
564 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
565 {
566 ncur *= elem;
567 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
568 ncur = ncur - sizeof (void *) * 4;
569 ncur /= elem;
570 }
571
572 return ncur;
573}
574
575static noinline void *
576array_realloc (int elem, void *base, int *cur, int cnt)
577{
578 *cur = array_nextsize (elem, *cur, cnt);
579 return ev_realloc (base, elem * *cur);
580}
581
582#define array_needsize(type,base,cur,cnt,init) \
583 if (expect_false ((cnt) > (cur))) \
584 { \
585 int ocur_ = (cur); \
586 (base) = (type *)array_realloc \
587 (sizeof (type), (base), &(cur), (cnt)); \
588 init ((base) + (ocur_), (cur) - ocur_); \
589 }
590
591#if 0
592#define array_slim(type,stem) \
593 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
594 { \
595 stem ## max = array_roundsize (stem ## cnt >> 1); \
596 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
597 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
598 }
599#endif
600
601#define array_free(stem, idx) \
602 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
603
604/*****************************************************************************/
605
606void noinline
607ev_feed_event (EV_P_ void *w, int revents)
608{
609 W w_ = (W)w;
610 int pri = ABSPRI (w_);
611
612 if (expect_false (w_->pending))
613 pendings [pri][w_->pending - 1].events |= revents;
614 else
615 {
616 w_->pending = ++pendingcnt [pri];
617 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
618 pendings [pri][w_->pending - 1].w = w_;
619 pendings [pri][w_->pending - 1].events = revents;
620 }
621}
622
623void inline_speed
624queue_events (EV_P_ W *events, int eventcnt, int type)
625{
626 int i;
627
628 for (i = 0; i < eventcnt; ++i)
629 ev_feed_event (EV_A_ events [i], type);
630}
631
632/*****************************************************************************/
633
634void inline_size
151anfds_init (ANFD *base, int count) 635anfds_init (ANFD *base, int count)
152{ 636{
153 while (count--) 637 while (count--)
154 { 638 {
155 base->head = 0; 639 base->head = 0;
156 base->events = EV_NONE; 640 base->events = EV_NONE;
641 base->reify = 0;
642
157 ++base; 643 ++base;
158 } 644 }
159} 645}
160 646
161typedef struct 647void inline_speed
162{
163 W w;
164 int events;
165} ANPENDING;
166
167static ANPENDING *pendings;
168static int pendingmax, pendingcnt;
169
170static void
171event (W w, int events)
172{
173 w->pending = ++pendingcnt;
174 array_needsize (pendings, pendingmax, pendingcnt, );
175 pendings [pendingcnt - 1].w = w;
176 pendings [pendingcnt - 1].events = events;
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) 648fd_event (EV_P_ int fd, int revents)
190{ 649{
191 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
192 struct ev_io *w; 651 ev_io *w;
193 652
194 for (w = anfd->head; w; w = w->next) 653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195 { 654 {
196 int ev = w->events & events; 655 int ev = w->events & revents;
197 656
198 if (ev) 657 if (ev)
199 event ((W)w, ev); 658 ev_feed_event (EV_A_ (W)w, ev);
200 } 659 }
201} 660}
202 661
203/*****************************************************************************/ 662void
663ev_feed_fd_event (EV_P_ int fd, int revents)
664{
665 if (fd >= 0 && fd < anfdmax)
666 fd_event (EV_A_ fd, revents);
667}
204 668
205static int *fdchanges; 669void inline_size
206static int fdchangemax, fdchangecnt; 670fd_reify (EV_P)
207
208static void
209fd_reify (void)
210{ 671{
211 int i; 672 int i;
212 673
213 for (i = 0; i < fdchangecnt; ++i) 674 for (i = 0; i < fdchangecnt; ++i)
214 { 675 {
215 int fd = fdchanges [i]; 676 int fd = fdchanges [i];
216 ANFD *anfd = anfds + fd; 677 ANFD *anfd = anfds + fd;
217 struct ev_io *w; 678 ev_io *w;
218 679
219 int events = 0; 680 unsigned char events = 0;
220 681
221 for (w = anfd->head; w; w = w->next) 682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222 events |= w->events; 683 events |= (unsigned char)w->events;
223 684
224 anfd->events &= ~EV_REIFY; 685#if EV_SELECT_IS_WINSOCKET
225 686 if (events)
226 if (anfd->events != events)
227 { 687 {
228 method_modify (fd, anfd->events, events); 688 unsigned long argp;
229 anfd->events = events; 689 #ifdef EV_FD_TO_WIN32_HANDLE
690 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
691 #else
692 anfd->handle = _get_osfhandle (fd);
693 #endif
694 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230 } 695 }
696#endif
697
698 {
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
702 anfd->reify = 0;
703 anfd->events = events;
704
705 if (o_events != events || o_reify & EV_IOFDSET)
706 backend_modify (EV_A_ fd, o_events, events);
707 }
231 } 708 }
232 709
233 fdchangecnt = 0; 710 fdchangecnt = 0;
234} 711}
235 712
236static void 713void inline_size
237fd_change (int fd) 714fd_change (EV_P_ int fd, int flags)
238{ 715{
239 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 716 unsigned char reify = anfds [fd].reify;
240 return; 717 anfds [fd].reify |= flags;
241 718
242 anfds [fd].events |= EV_REIFY; 719 if (expect_true (!reify))
243 720 {
244 ++fdchangecnt; 721 ++fdchangecnt;
245 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246 fdchanges [fdchangecnt - 1] = fd; 723 fdchanges [fdchangecnt - 1] = fd;
724 }
725}
726
727void inline_speed
728fd_kill (EV_P_ int fd)
729{
730 ev_io *w;
731
732 while ((w = (ev_io *)anfds [fd].head))
733 {
734 ev_io_stop (EV_A_ w);
735 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
736 }
737}
738
739int inline_size
740fd_valid (int fd)
741{
742#ifdef _WIN32
743 return _get_osfhandle (fd) != -1;
744#else
745 return fcntl (fd, F_GETFD) != -1;
746#endif
247} 747}
248 748
249/* called on EBADF to verify fds */ 749/* called on EBADF to verify fds */
250static void 750static void noinline
251fd_recheck (void) 751fd_ebadf (EV_P)
252{ 752{
253 int fd; 753 int fd;
254 754
255 for (fd = 0; fd < anfdmax; ++fd) 755 for (fd = 0; fd < anfdmax; ++fd)
256 if (anfds [fd].events) 756 if (anfds [fd].events)
257 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 757 if (!fd_valid (fd) == -1 && errno == EBADF)
258 while (anfds [fd].head) 758 fd_kill (EV_A_ fd);
759}
760
761/* called on ENOMEM in select/poll to kill some fds and retry */
762static void noinline
763fd_enomem (EV_P)
764{
765 int fd;
766
767 for (fd = anfdmax; fd--; )
768 if (anfds [fd].events)
259 { 769 {
260 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 770 fd_kill (EV_A_ fd);
261 ev_io_stop (anfds [fd].head); 771 return;
262 } 772 }
773}
774
775/* usually called after fork if backend needs to re-arm all fds from scratch */
776static void noinline
777fd_rearm_all (EV_P)
778{
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 {
784 anfds [fd].events = 0;
785 fd_change (EV_A_ fd, EV_IOFDSET | 1);
786 }
263} 787}
264 788
265/*****************************************************************************/ 789/*****************************************************************************/
266 790
267static struct ev_timer **timers; 791/*
268static int timermax, timercnt; 792 * the heap functions want a real array index. array index 0 uis guaranteed to not
793 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
794 * the branching factor of the d-tree.
795 */
269 796
270static struct ev_periodic **periodics; 797/*
271static int periodicmax, periodiccnt; 798 * at the moment we allow libev the luxury of two heaps,
799 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
800 * which is more cache-efficient.
801 * the difference is about 5% with 50000+ watchers.
802 */
803#if EV_USE_4HEAP
272 804
273static void 805#define DHEAP 4
274upheap (WT *timers, int k) 806#define HEAP0 (DHEAP - 1) /* index of first element in heap */
275{ 807#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
276 WT w = timers [k];
277 808
278 while (k && timers [k >> 1]->at > w->at) 809/* towards the root */
279 { 810void inline_speed
280 timers [k] = timers [k >> 1]; 811upheap (ANHE *heap, int k)
281 timers [k]->active = k + 1; 812{
282 k >>= 1; 813 ANHE he = heap [k];
814
815 for (;;)
283 } 816 {
817 int p = HPARENT (k);
284 818
285 timers [k] = w; 819 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
286 timers [k]->active = k + 1;
287
288}
289
290static void
291downheap (WT *timers, int N, int k)
292{
293 WT w = timers [k];
294
295 while (k < (N >> 1))
296 {
297 int j = k << 1;
298
299 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
300 ++j;
301
302 if (w->at <= timers [j]->at)
303 break; 820 break;
304 821
305 timers [k] = timers [j]; 822 heap [k] = heap [p];
306 timers [k]->active = k + 1; 823 ev_active (ANHE_w (heap [k])) = k;
307 k = j; 824 k = p;
825 }
826
827 heap [k] = he;
828 ev_active (ANHE_w (he)) = k;
829}
830
831/* away from the root */
832void inline_speed
833downheap (ANHE *heap, int N, int k)
834{
835 ANHE he = heap [k];
836 ANHE *E = heap + N + HEAP0;
837
838 for (;;)
308 } 839 {
840 ev_tstamp minat;
841 ANHE *minpos;
842 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
309 843
310 timers [k] = w; 844 // find minimum child
311 timers [k]->active = k + 1; 845 if (expect_true (pos + DHEAP - 1 < E))
846 {
847 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
849 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
850 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
851 }
852 else if (pos < E)
853 {
854 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
855 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else
860 break;
861
862 if (ANHE_at (he) <= minat)
863 break;
864
865 heap [k] = *minpos;
866 ev_active (ANHE_w (*minpos)) = k;
867
868 k = minpos - heap;
869 }
870
871 heap [k] = he;
872 ev_active (ANHE_w (he)) = k;
873}
874
875#else // 4HEAP
876
877#define HEAP0 1
878#define HPARENT(k) ((k) >> 1)
879
880/* towards the root */
881void inline_speed
882upheap (ANHE *heap, int k)
883{
884 ANHE he = heap [k];
885
886 for (;;)
887 {
888 int p = HPARENT (k);
889
890 /* maybe we could use a dummy element at heap [0]? */
891 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
892 break;
893
894 heap [k] = heap [p];
895 ev_active (ANHE_w (heap [k])) = k;
896 k = p;
897 }
898
899 heap [k] = he;
900 ev_active (ANHE_w (heap [k])) = k;
901}
902
903/* away from the root */
904void inline_speed
905downheap (ANHE *heap, int N, int k)
906{
907 ANHE he = heap [k];
908
909 for (;;)
910 {
911 int c = k << 1;
912
913 if (c > N)
914 break;
915
916 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
917 ? 1 : 0;
918
919 if (ANHE_at (he) <= ANHE_at (heap [c]))
920 break;
921
922 heap [k] = heap [c];
923 ev_active (ANHE_w (heap [k])) = k;
924
925 k = c;
926 }
927
928 heap [k] = he;
929 ev_active (ANHE_w (he)) = k;
930}
931#endif
932
933void inline_size
934adjustheap (ANHE *heap, int N, int k)
935{
936 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
937 upheap (heap, k);
938 else
939 downheap (heap, N, k);
312} 940}
313 941
314/*****************************************************************************/ 942/*****************************************************************************/
315 943
316typedef struct 944typedef struct
317{ 945{
318 struct ev_signal *head; 946 WL head;
319 sig_atomic_t gotsig; 947 EV_ATOMIC_T gotsig;
320} ANSIG; 948} ANSIG;
321 949
322static ANSIG *signals; 950static ANSIG *signals;
323static int signalmax; 951static int signalmax;
324 952
325static int sigpipe [2]; 953static EV_ATOMIC_T gotsig;
326static sig_atomic_t gotsig;
327static struct ev_io sigev;
328 954
329static void 955void inline_size
330signals_init (ANSIG *base, int count) 956signals_init (ANSIG *base, int count)
331{ 957{
332 while (count--) 958 while (count--)
333 { 959 {
334 base->head = 0; 960 base->head = 0;
335 base->gotsig = 0; 961 base->gotsig = 0;
962
336 ++base; 963 ++base;
337 } 964 }
338} 965}
339 966
967/*****************************************************************************/
968
969void inline_speed
970fd_intern (int fd)
971{
972#ifdef _WIN32
973 int arg = 1;
974 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
975#else
976 fcntl (fd, F_SETFD, FD_CLOEXEC);
977 fcntl (fd, F_SETFL, O_NONBLOCK);
978#endif
979}
980
981static void noinline
982evpipe_init (EV_P)
983{
984 if (!ev_is_active (&pipeev))
985 {
986#if EV_USE_EVENTFD
987 if ((evfd = eventfd (0, 0)) >= 0)
988 {
989 evpipe [0] = -1;
990 fd_intern (evfd);
991 ev_io_set (&pipeev, evfd, EV_READ);
992 }
993 else
994#endif
995 {
996 while (pipe (evpipe))
997 syserr ("(libev) error creating signal/async pipe");
998
999 fd_intern (evpipe [0]);
1000 fd_intern (evpipe [1]);
1001 ev_io_set (&pipeev, evpipe [0], EV_READ);
1002 }
1003
1004 ev_io_start (EV_A_ &pipeev);
1005 ev_unref (EV_A); /* watcher should not keep loop alive */
1006 }
1007}
1008
1009void inline_size
1010evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1011{
1012 if (!*flag)
1013 {
1014 int old_errno = errno; /* save errno because write might clobber it */
1015
1016 *flag = 1;
1017
1018#if EV_USE_EVENTFD
1019 if (evfd >= 0)
1020 {
1021 uint64_t counter = 1;
1022 write (evfd, &counter, sizeof (uint64_t));
1023 }
1024 else
1025#endif
1026 write (evpipe [1], &old_errno, 1);
1027
1028 errno = old_errno;
1029 }
1030}
1031
340static void 1032static void
1033pipecb (EV_P_ ev_io *iow, int revents)
1034{
1035#if EV_USE_EVENTFD
1036 if (evfd >= 0)
1037 {
1038 uint64_t counter;
1039 read (evfd, &counter, sizeof (uint64_t));
1040 }
1041 else
1042#endif
1043 {
1044 char dummy;
1045 read (evpipe [0], &dummy, 1);
1046 }
1047
1048 if (gotsig && ev_is_default_loop (EV_A))
1049 {
1050 int signum;
1051 gotsig = 0;
1052
1053 for (signum = signalmax; signum--; )
1054 if (signals [signum].gotsig)
1055 ev_feed_signal_event (EV_A_ signum + 1);
1056 }
1057
1058#if EV_ASYNC_ENABLE
1059 if (gotasync)
1060 {
1061 int i;
1062 gotasync = 0;
1063
1064 for (i = asynccnt; i--; )
1065 if (asyncs [i]->sent)
1066 {
1067 asyncs [i]->sent = 0;
1068 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1069 }
1070 }
1071#endif
1072}
1073
1074/*****************************************************************************/
1075
1076static void
341sighandler (int signum) 1077ev_sighandler (int signum)
342{ 1078{
1079#if EV_MULTIPLICITY
1080 struct ev_loop *loop = &default_loop_struct;
1081#endif
1082
1083#if _WIN32
1084 signal (signum, ev_sighandler);
1085#endif
1086
343 signals [signum - 1].gotsig = 1; 1087 signals [signum - 1].gotsig = 1;
344 1088 evpipe_write (EV_A_ &gotsig);
345 if (!gotsig)
346 {
347 gotsig = 1;
348 write (sigpipe [1], &gotsig, 1);
349 }
350} 1089}
351 1090
352static void 1091void noinline
353sigcb (struct ev_io *iow, int revents) 1092ev_feed_signal_event (EV_P_ int signum)
354{ 1093{
355 struct ev_signal *w; 1094 WL w;
356 int sig;
357 1095
358 gotsig = 0; 1096#if EV_MULTIPLICITY
359 read (sigpipe [0], &revents, 1); 1097 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1098#endif
360 1099
361 for (sig = signalmax; sig--; ) 1100 --signum;
362 if (signals [sig].gotsig) 1101
363 { 1102 if (signum < 0 || signum >= signalmax)
1103 return;
1104
364 signals [sig].gotsig = 0; 1105 signals [signum].gotsig = 0;
365 1106
366 for (w = signals [sig].head; w; w = w->next) 1107 for (w = signals [signum].head; w; w = w->next)
367 event ((W)w, EV_SIGNAL); 1108 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} 1109}
384 1110
385/*****************************************************************************/ 1111/*****************************************************************************/
386 1112
387static struct ev_idle **idles; 1113static WL childs [EV_PID_HASHSIZE];
388static int idlemax, idlecnt;
389 1114
390static struct ev_prepare **prepares; 1115#ifndef _WIN32
391static int preparemax, preparecnt;
392 1116
393static struct ev_check **checks;
394static int checkmax, checkcnt;
395
396/*****************************************************************************/
397
398static struct ev_child *childs [PID_HASHSIZE];
399static struct ev_signal childev; 1117static ev_signal childev;
1118
1119#ifndef WIFCONTINUED
1120# define WIFCONTINUED(status) 0
1121#endif
1122
1123void inline_speed
1124child_reap (EV_P_ int chain, int pid, int status)
1125{
1126 ev_child *w;
1127 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1128
1129 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1130 {
1131 if ((w->pid == pid || !w->pid)
1132 && (!traced || (w->flags & 1)))
1133 {
1134 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1135 w->rpid = pid;
1136 w->rstatus = status;
1137 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1138 }
1139 }
1140}
400 1141
401#ifndef WCONTINUED 1142#ifndef WCONTINUED
402# define WCONTINUED 0 1143# define WCONTINUED 0
403#endif 1144#endif
404 1145
405static void 1146static void
406childcb (struct ev_signal *sw, int revents) 1147childcb (EV_P_ ev_signal *sw, int revents)
407{ 1148{
408 struct ev_child *w;
409 int pid, status; 1149 int pid, status;
410 1150
1151 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1152 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1153 if (!WCONTINUED
413 if (w->pid == pid || w->pid == -1) 1154 || errno != EINVAL
414 { 1155 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415 w->status = status; 1156 return;
416 event ((W)w, EV_CHILD); 1157
417 } 1158 /* make sure we are called again until all children have been reaped */
1159 /* we need to do it this way so that the callback gets called before we continue */
1160 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1161
1162 child_reap (EV_A_ pid, pid, status);
1163 if (EV_PID_HASHSIZE > 1)
1164 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418} 1165}
1166
1167#endif
419 1168
420/*****************************************************************************/ 1169/*****************************************************************************/
421 1170
1171#if EV_USE_PORT
1172# include "ev_port.c"
1173#endif
1174#if EV_USE_KQUEUE
1175# include "ev_kqueue.c"
1176#endif
422#if EV_USE_EPOLL 1177#if EV_USE_EPOLL
423# include "ev_epoll.c" 1178# include "ev_epoll.c"
424#endif 1179#endif
1180#if EV_USE_POLL
1181# include "ev_poll.c"
1182#endif
425#if EV_USE_SELECT 1183#if EV_USE_SELECT
426# include "ev_select.c" 1184# include "ev_select.c"
427#endif 1185#endif
428 1186
429int 1187int
… …
436ev_version_minor (void) 1194ev_version_minor (void)
437{ 1195{
438 return EV_VERSION_MINOR; 1196 return EV_VERSION_MINOR;
439} 1197}
440 1198
441int ev_init (int flags) 1199/* return true if we are running with elevated privileges and should ignore env variables */
1200int inline_size
1201enable_secure (void)
442{ 1202{
443 if (!ev_method) 1203#ifdef _WIN32
1204 return 0;
1205#else
1206 return getuid () != geteuid ()
1207 || getgid () != getegid ();
1208#endif
1209}
1210
1211unsigned int
1212ev_supported_backends (void)
1213{
1214 unsigned int flags = 0;
1215
1216 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1217 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1218 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1219 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1220 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1221
1222 return flags;
1223}
1224
1225unsigned int
1226ev_recommended_backends (void)
1227{
1228 unsigned int flags = ev_supported_backends ();
1229
1230#ifndef __NetBSD__
1231 /* kqueue is borked on everything but netbsd apparently */
1232 /* it usually doesn't work correctly on anything but sockets and pipes */
1233 flags &= ~EVBACKEND_KQUEUE;
1234#endif
1235#ifdef __APPLE__
1236 // flags &= ~EVBACKEND_KQUEUE; for documentation
1237 flags &= ~EVBACKEND_POLL;
1238#endif
1239
1240 return flags;
1241}
1242
1243unsigned int
1244ev_embeddable_backends (void)
1245{
1246 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1247
1248 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1249 /* please fix it and tell me how to detect the fix */
1250 flags &= ~EVBACKEND_EPOLL;
1251
1252 return flags;
1253}
1254
1255unsigned int
1256ev_backend (EV_P)
1257{
1258 return backend;
1259}
1260
1261unsigned int
1262ev_loop_count (EV_P)
1263{
1264 return loop_count;
1265}
1266
1267void
1268ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1269{
1270 io_blocktime = interval;
1271}
1272
1273void
1274ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1275{
1276 timeout_blocktime = interval;
1277}
1278
1279static void noinline
1280loop_init (EV_P_ unsigned int flags)
1281{
1282 if (!backend)
444 { 1283 {
445#if EV_USE_MONOTONIC 1284#if EV_USE_MONOTONIC
446 { 1285 {
447 struct timespec ts; 1286 struct timespec ts;
448 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1287 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449 have_monotonic = 1; 1288 have_monotonic = 1;
450 } 1289 }
451#endif 1290#endif
452 1291
453 ev_now = ev_time (); 1292 ev_rt_now = ev_time ();
454 now = get_clock (); 1293 mn_now = get_clock ();
1294 now_floor = mn_now;
455 diff = ev_now - now; 1295 rtmn_diff = ev_rt_now - mn_now;
456 1296
457 if (pipe (sigpipe)) 1297 io_blocktime = 0.;
458 return 0; 1298 timeout_blocktime = 0.;
1299 backend = 0;
1300 backend_fd = -1;
1301 gotasync = 0;
1302#if EV_USE_INOTIFY
1303 fs_fd = -2;
1304#endif
459 1305
460 ev_method = EVMETHOD_NONE; 1306 /* pid check not overridable via env */
1307#ifndef _WIN32
1308 if (flags & EVFLAG_FORKCHECK)
1309 curpid = getpid ();
1310#endif
1311
1312 if (!(flags & EVFLAG_NOENV)
1313 && !enable_secure ()
1314 && getenv ("LIBEV_FLAGS"))
1315 flags = atoi (getenv ("LIBEV_FLAGS"));
1316
1317 if (!(flags & 0x0000ffffU))
1318 flags |= ev_recommended_backends ();
1319
1320#if EV_USE_PORT
1321 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1322#endif
1323#if EV_USE_KQUEUE
1324 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1325#endif
461#if EV_USE_EPOLL 1326#if EV_USE_EPOLL
462 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1327 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1328#endif
1329#if EV_USE_POLL
1330 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463#endif 1331#endif
464#if EV_USE_SELECT 1332#if EV_USE_SELECT
465 if (ev_method == EVMETHOD_NONE) select_init (flags); 1333 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466#endif 1334#endif
467 1335
468 if (ev_method) 1336 ev_init (&pipeev, pipecb);
1337 ev_set_priority (&pipeev, EV_MAXPRI);
1338 }
1339}
1340
1341static void noinline
1342loop_destroy (EV_P)
1343{
1344 int i;
1345
1346 if (ev_is_active (&pipeev))
1347 {
1348 ev_ref (EV_A); /* signal watcher */
1349 ev_io_stop (EV_A_ &pipeev);
1350
1351#if EV_USE_EVENTFD
1352 if (evfd >= 0)
1353 close (evfd);
1354#endif
1355
1356 if (evpipe [0] >= 0)
469 { 1357 {
470 ev_watcher_init (&sigev, sigcb); 1358 close (evpipe [0]);
471 siginit (); 1359 close (evpipe [1]);
1360 }
1361 }
472 1362
1363#if EV_USE_INOTIFY
1364 if (fs_fd >= 0)
1365 close (fs_fd);
1366#endif
1367
1368 if (backend_fd >= 0)
1369 close (backend_fd);
1370
1371#if EV_USE_PORT
1372 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1373#endif
1374#if EV_USE_KQUEUE
1375 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1376#endif
1377#if EV_USE_EPOLL
1378 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1379#endif
1380#if EV_USE_POLL
1381 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1382#endif
1383#if EV_USE_SELECT
1384 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1385#endif
1386
1387 for (i = NUMPRI; i--; )
1388 {
1389 array_free (pending, [i]);
1390#if EV_IDLE_ENABLE
1391 array_free (idle, [i]);
1392#endif
1393 }
1394
1395 ev_free (anfds); anfdmax = 0;
1396
1397 /* have to use the microsoft-never-gets-it-right macro */
1398 array_free (fdchange, EMPTY);
1399 array_free (timer, EMPTY);
1400#if EV_PERIODIC_ENABLE
1401 array_free (periodic, EMPTY);
1402#endif
1403#if EV_FORK_ENABLE
1404 array_free (fork, EMPTY);
1405#endif
1406 array_free (prepare, EMPTY);
1407 array_free (check, EMPTY);
1408#if EV_ASYNC_ENABLE
1409 array_free (async, EMPTY);
1410#endif
1411
1412 backend = 0;
1413}
1414
1415#if EV_USE_INOTIFY
1416void inline_size infy_fork (EV_P);
1417#endif
1418
1419void inline_size
1420loop_fork (EV_P)
1421{
1422#if EV_USE_PORT
1423 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1424#endif
1425#if EV_USE_KQUEUE
1426 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1427#endif
1428#if EV_USE_EPOLL
1429 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1430#endif
1431#if EV_USE_INOTIFY
1432 infy_fork (EV_A);
1433#endif
1434
1435 if (ev_is_active (&pipeev))
1436 {
1437 /* this "locks" the handlers against writing to the pipe */
1438 /* while we modify the fd vars */
1439 gotsig = 1;
1440#if EV_ASYNC_ENABLE
1441 gotasync = 1;
1442#endif
1443
1444 ev_ref (EV_A);
1445 ev_io_stop (EV_A_ &pipeev);
1446
1447#if EV_USE_EVENTFD
1448 if (evfd >= 0)
1449 close (evfd);
1450#endif
1451
1452 if (evpipe [0] >= 0)
1453 {
1454 close (evpipe [0]);
1455 close (evpipe [1]);
1456 }
1457
1458 evpipe_init (EV_A);
1459 /* now iterate over everything, in case we missed something */
1460 pipecb (EV_A_ &pipeev, EV_READ);
1461 }
1462
1463 postfork = 0;
1464}
1465
1466#if EV_MULTIPLICITY
1467struct ev_loop *
1468ev_loop_new (unsigned int flags)
1469{
1470 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1471
1472 memset (loop, 0, sizeof (struct ev_loop));
1473
1474 loop_init (EV_A_ flags);
1475
1476 if (ev_backend (EV_A))
1477 return loop;
1478
1479 return 0;
1480}
1481
1482void
1483ev_loop_destroy (EV_P)
1484{
1485 loop_destroy (EV_A);
1486 ev_free (loop);
1487}
1488
1489void
1490ev_loop_fork (EV_P)
1491{
1492 postfork = 1; /* must be in line with ev_default_fork */
1493}
1494#endif
1495
1496#if EV_MULTIPLICITY
1497struct ev_loop *
1498ev_default_loop_init (unsigned int flags)
1499#else
1500int
1501ev_default_loop (unsigned int flags)
1502#endif
1503{
1504 if (!ev_default_loop_ptr)
1505 {
1506#if EV_MULTIPLICITY
1507 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1508#else
1509 ev_default_loop_ptr = 1;
1510#endif
1511
1512 loop_init (EV_A_ flags);
1513
1514 if (ev_backend (EV_A))
1515 {
1516#ifndef _WIN32
473 ev_signal_init (&childev, childcb, SIGCHLD); 1517 ev_signal_init (&childev, childcb, SIGCHLD);
1518 ev_set_priority (&childev, EV_MAXPRI);
474 ev_signal_start (&childev); 1519 ev_signal_start (EV_A_ &childev);
1520 ev_unref (EV_A); /* child watcher should not keep loop alive */
1521#endif
475 } 1522 }
1523 else
1524 ev_default_loop_ptr = 0;
476 } 1525 }
477 1526
478 return ev_method; 1527 return ev_default_loop_ptr;
1528}
1529
1530void
1531ev_default_destroy (void)
1532{
1533#if EV_MULTIPLICITY
1534 struct ev_loop *loop = ev_default_loop_ptr;
1535#endif
1536
1537#ifndef _WIN32
1538 ev_ref (EV_A); /* child watcher */
1539 ev_signal_stop (EV_A_ &childev);
1540#endif
1541
1542 loop_destroy (EV_A);
1543}
1544
1545void
1546ev_default_fork (void)
1547{
1548#if EV_MULTIPLICITY
1549 struct ev_loop *loop = ev_default_loop_ptr;
1550#endif
1551
1552 if (backend)
1553 postfork = 1; /* must be in line with ev_loop_fork */
479} 1554}
480 1555
481/*****************************************************************************/ 1556/*****************************************************************************/
482 1557
483void 1558void
484ev_prefork (void) 1559ev_invoke (EV_P_ void *w, int revents)
485{ 1560{
486 /* nop */ 1561 EV_CB_INVOKE ((W)w, revents);
487} 1562}
488 1563
489void 1564void 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) 1565call_pending (EV_P)
514{ 1566{
1567 int pri;
1568
1569 for (pri = NUMPRI; pri--; )
515 while (pendingcnt) 1570 while (pendingcnt [pri])
516 { 1571 {
517 ANPENDING *p = pendings + --pendingcnt; 1572 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518 1573
519 if (p->w) 1574 if (expect_true (p->w))
1575 {
1576 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1577
1578 p->w->pending = 0;
1579 EV_CB_INVOKE (p->w, p->events);
1580 }
1581 }
1582}
1583
1584#if EV_IDLE_ENABLE
1585void inline_size
1586idle_reify (EV_P)
1587{
1588 if (expect_false (idleall))
1589 {
1590 int pri;
1591
1592 for (pri = NUMPRI; pri--; )
520 { 1593 {
521 p->w->pending = 0; 1594 if (pendingcnt [pri])
522 p->w->cb (p->w, p->events); 1595 break;
1596
1597 if (idlecnt [pri])
1598 {
1599 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1600 break;
1601 }
523 } 1602 }
524 } 1603 }
525} 1604}
1605#endif
526 1606
527static void 1607void inline_size
528timers_reify (void) 1608timers_reify (EV_P)
529{ 1609{
530 while (timercnt && timers [0]->at <= now) 1610 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
531 { 1611 {
532 struct ev_timer *w = timers [0]; 1612 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1613
1614 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
533 1615
534 /* first reschedule or stop timer */ 1616 /* first reschedule or stop timer */
535 if (w->repeat) 1617 if (w->repeat)
536 { 1618 {
537 w->at = now + w->repeat; 1619 ev_at (w) += w->repeat;
538 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1620 if (ev_at (w) < mn_now)
1621 ev_at (w) = mn_now;
1622
1623 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1624
1625 ANHE_at_set (timers [HEAP0]);
539 downheap ((WT *)timers, timercnt, 0); 1626 downheap (timers, timercnt, HEAP0);
540 } 1627 }
541 else 1628 else
542 ev_timer_stop (w); /* nonrepeating: stop timer */ 1629 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543 1630
544 event ((W)w, EV_TIMEOUT); 1631 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545 } 1632 }
546} 1633}
547 1634
548static void 1635#if EV_PERIODIC_ENABLE
1636void inline_size
549periodics_reify (void) 1637periodics_reify (EV_P)
550{ 1638{
551 while (periodiccnt && periodics [0]->at <= ev_now) 1639 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
552 { 1640 {
553 struct ev_periodic *w = periodics [0]; 1641 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1642
1643 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554 1644
555 /* first reschedule or stop timer */ 1645 /* first reschedule or stop timer */
556 if (w->interval) 1646 if (w->reschedule_cb)
557 { 1647 {
558 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1648 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
559 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1649
1650 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1651
1652 ANHE_at_set (periodics [HEAP0]);
560 downheap ((WT *)periodics, periodiccnt, 0); 1653 downheap (periodics, periodiccnt, HEAP0);
1654 }
1655 else if (w->interval)
1656 {
1657 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1658 /* if next trigger time is not sufficiently in the future, put it there */
1659 /* this might happen because of floating point inexactness */
1660 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1661 {
1662 ev_at (w) += w->interval;
1663
1664 /* if interval is unreasonably low we might still have a time in the past */
1665 /* so correct this. this will make the periodic very inexact, but the user */
1666 /* has effectively asked to get triggered more often than possible */
1667 if (ev_at (w) < ev_rt_now)
1668 ev_at (w) = ev_rt_now;
1669 }
1670
1671 ANHE_at_set (periodics [HEAP0]);
1672 downheap (periodics, periodiccnt, HEAP0);
561 } 1673 }
562 else 1674 else
563 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1675 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564 1676
565 event ((W)w, EV_TIMEOUT); 1677 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566 } 1678 }
567} 1679}
568 1680
569static void 1681static void noinline
570periodics_reschedule (ev_tstamp diff) 1682periodics_reschedule (EV_P)
571{ 1683{
572 int i; 1684 int i;
573 1685
574 /* adjust periodics after time jump */ 1686 /* adjust periodics after time jump */
1687 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1688 {
1689 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1690
1691 if (w->reschedule_cb)
1692 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1693 else if (w->interval)
1694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1695
1696 ANHE_at_set (periodics [i]);
1697 }
1698
1699 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
1700 /* also, this is easy and corretc for both 2-heaps and 4-heaps */
575 for (i = 0; i < periodiccnt; ++i) 1701 for (i = 0; i < periodiccnt; ++i)
576 { 1702 upheap (periodics, i + HEAP0);
577 struct ev_periodic *w = periodics [i]; 1703}
1704#endif
578 1705
579 if (w->interval) 1706void inline_speed
1707time_update (EV_P_ ev_tstamp max_block)
1708{
1709 int i;
1710
1711#if EV_USE_MONOTONIC
1712 if (expect_true (have_monotonic))
1713 {
1714 ev_tstamp odiff = rtmn_diff;
1715
1716 mn_now = get_clock ();
1717
1718 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1719 /* interpolate in the meantime */
1720 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
580 { 1721 {
581 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1722 ev_rt_now = rtmn_diff + mn_now;
1723 return;
1724 }
582 1725
583 if (fabs (diff) >= 1e-4) 1726 now_floor = mn_now;
1727 ev_rt_now = ev_time ();
1728
1729 /* loop a few times, before making important decisions.
1730 * on the choice of "4": one iteration isn't enough,
1731 * in case we get preempted during the calls to
1732 * ev_time and get_clock. a second call is almost guaranteed
1733 * to succeed in that case, though. and looping a few more times
1734 * doesn't hurt either as we only do this on time-jumps or
1735 * in the unlikely event of having been preempted here.
1736 */
1737 for (i = 4; --i; )
1738 {
1739 rtmn_diff = ev_rt_now - mn_now;
1740
1741 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1742 return; /* all is well */
1743
1744 ev_rt_now = ev_time ();
1745 mn_now = get_clock ();
1746 now_floor = mn_now;
1747 }
1748
1749# if EV_PERIODIC_ENABLE
1750 periodics_reschedule (EV_A);
1751# endif
1752 /* no timer adjustment, as the monotonic clock doesn't jump */
1753 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1754 }
1755 else
1756#endif
1757 {
1758 ev_rt_now = ev_time ();
1759
1760 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1761 {
1762#if EV_PERIODIC_ENABLE
1763 periodics_reschedule (EV_A);
1764#endif
1765 /* adjust timers. this is easy, as the offset is the same for all of them */
1766 for (i = 0; i < timercnt; ++i)
584 { 1767 {
585 ev_periodic_stop (w); 1768 ANHE *he = timers + i + HEAP0;
586 ev_periodic_start (w); 1769 ANHE_w (*he)->at += ev_rt_now - mn_now;
587 1770 ANHE_at_set (*he);
588 i = 0; /* restart loop, inefficient, but time jumps should be rare */
589 } 1771 }
590 } 1772 }
591 }
592}
593 1773
594static void 1774 mn_now = ev_rt_now;
595time_update (void)
596{
597 int i;
598
599 ev_now = ev_time ();
600
601 if (have_monotonic)
602 { 1775 }
603 ev_tstamp odiff = diff; 1776}
604 1777
605 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1778void
1779ev_ref (EV_P)
1780{
1781 ++activecnt;
1782}
1783
1784void
1785ev_unref (EV_P)
1786{
1787 --activecnt;
1788}
1789
1790static int loop_done;
1791
1792void
1793ev_loop (EV_P_ int flags)
1794{
1795 loop_done = EVUNLOOP_CANCEL;
1796
1797 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1798
1799 do
1800 {
1801#ifndef _WIN32
1802 if (expect_false (curpid)) /* penalise the forking check even more */
1803 if (expect_false (getpid () != curpid))
1804 {
1805 curpid = getpid ();
1806 postfork = 1;
1807 }
1808#endif
1809
1810#if EV_FORK_ENABLE
1811 /* we might have forked, so queue fork handlers */
1812 if (expect_false (postfork))
1813 if (forkcnt)
1814 {
1815 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1816 call_pending (EV_A);
1817 }
1818#endif
1819
1820 /* queue prepare watchers (and execute them) */
1821 if (expect_false (preparecnt))
606 { 1822 {
607 now = get_clock (); 1823 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
608 diff = ev_now - now; 1824 call_pending (EV_A);
609
610 if (fabs (odiff - diff) < MIN_TIMEJUMP)
611 return; /* all is well */
612
613 ev_now = ev_time ();
614 } 1825 }
615 1826
616 periodics_reschedule (diff - odiff); 1827 if (expect_false (!activecnt))
617 /* no timer adjustment, as the monotonic clock doesn't jump */ 1828 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 1829
625 /* adjust timers. this is easy, as the offset is the same for all */ 1830 /* we might have forked, so reify kernel state if necessary */
626 for (i = 0; i < timercnt; ++i) 1831 if (expect_false (postfork))
627 timers [i]->at += diff; 1832 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 1833
650 /* update fd-related kernel structures */ 1834 /* update fd-related kernel structures */
651 fd_reify (); 1835 fd_reify (EV_A);
652 1836
653 /* calculate blocking time */ 1837 /* calculate blocking time */
1838 {
1839 ev_tstamp waittime = 0.;
1840 ev_tstamp sleeptime = 0.;
654 1841
655 /* we only need this for !monotonic clockor timers, but as we basically 1842 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 { 1843 {
1844 /* update time to cancel out callback processing overhead */
1845 time_update (EV_A_ 1e100);
1846
663 block = MAX_BLOCKTIME; 1847 waittime = MAX_BLOCKTIME;
664 1848
665 if (timercnt) 1849 if (timercnt)
666 { 1850 {
667 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1851 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
668 if (block > to) block = to; 1852 if (waittime > to) waittime = to;
669 } 1853 }
670 1854
1855#if EV_PERIODIC_ENABLE
671 if (periodiccnt) 1856 if (periodiccnt)
672 { 1857 {
673 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1858 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
674 if (block > to) block = to; 1859 if (waittime > to) waittime = to;
675 } 1860 }
1861#endif
676 1862
677 if (block < 0.) block = 0.; 1863 if (expect_false (waittime < timeout_blocktime))
1864 waittime = timeout_blocktime;
1865
1866 sleeptime = waittime - backend_fudge;
1867
1868 if (expect_true (sleeptime > io_blocktime))
1869 sleeptime = io_blocktime;
1870
1871 if (sleeptime)
1872 {
1873 ev_sleep (sleeptime);
1874 waittime -= sleeptime;
1875 }
678 } 1876 }
679 1877
680 method_poll (block); 1878 ++loop_count;
1879 backend_poll (EV_A_ waittime);
681 1880
682 /* update ev_now, do magic */ 1881 /* update ev_rt_now, do magic */
683 time_update (); 1882 time_update (EV_A_ waittime + sleeptime);
1883 }
684 1884
685 /* queue pending timers and reschedule them */ 1885 /* queue pending timers and reschedule them */
686 timers_reify (); /* relative timers called last */ 1886 timers_reify (EV_A); /* relative timers called last */
1887#if EV_PERIODIC_ENABLE
687 periodics_reify (); /* absolute timers called first */ 1888 periodics_reify (EV_A); /* absolute timers called first */
1889#endif
688 1890
1891#if EV_IDLE_ENABLE
689 /* queue idle watchers unless io or timers are pending */ 1892 /* queue idle watchers unless other events are pending */
690 if (!pendingcnt) 1893 idle_reify (EV_A);
691 queue_events ((W *)idles, idlecnt, EV_IDLE); 1894#endif
692 1895
693 /* queue check watchers, to be executed first */ 1896 /* queue check watchers, to be executed first */
694 if (checkcnt) 1897 if (expect_false (checkcnt))
695 queue_events ((W *)checks, checkcnt, EV_CHECK); 1898 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696 1899
697 call_pending (); 1900 call_pending (EV_A);
698 } 1901 }
699 while (!ev_loop_done); 1902 while (expect_true (
1903 activecnt
1904 && !loop_done
1905 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1906 ));
700 1907
701 if (ev_loop_done != 2) 1908 if (loop_done == EVUNLOOP_ONE)
1909 loop_done = EVUNLOOP_CANCEL;
1910}
1911
1912void
1913ev_unloop (EV_P_ int how)
1914{
702 ev_loop_done = 0; 1915 loop_done = how;
703} 1916}
704 1917
705/*****************************************************************************/ 1918/*****************************************************************************/
706 1919
707static void 1920void inline_size
708wlist_add (WL *head, WL elem) 1921wlist_add (WL *head, WL elem)
709{ 1922{
710 elem->next = *head; 1923 elem->next = *head;
711 *head = elem; 1924 *head = elem;
712} 1925}
713 1926
714static void 1927void inline_size
715wlist_del (WL *head, WL elem) 1928wlist_del (WL *head, WL elem)
716{ 1929{
717 while (*head) 1930 while (*head)
718 { 1931 {
719 if (*head == elem) 1932 if (*head == elem)
… …
724 1937
725 head = &(*head)->next; 1938 head = &(*head)->next;
726 } 1939 }
727} 1940}
728 1941
729static void 1942void inline_speed
730ev_clear (W w) 1943clear_pending (EV_P_ W w)
731{ 1944{
732 if (w->pending) 1945 if (w->pending)
733 { 1946 {
734 pendings [w->pending - 1].w = 0; 1947 pendings [ABSPRI (w)][w->pending - 1].w = 0;
735 w->pending = 0; 1948 w->pending = 0;
736 } 1949 }
737} 1950}
738 1951
739static void 1952int
1953ev_clear_pending (EV_P_ void *w)
1954{
1955 W w_ = (W)w;
1956 int pending = w_->pending;
1957
1958 if (expect_true (pending))
1959 {
1960 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1961 w_->pending = 0;
1962 p->w = 0;
1963 return p->events;
1964 }
1965 else
1966 return 0;
1967}
1968
1969void inline_size
1970pri_adjust (EV_P_ W w)
1971{
1972 int pri = w->priority;
1973 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1974 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1975 w->priority = pri;
1976}
1977
1978void inline_speed
740ev_start (W w, int active) 1979ev_start (EV_P_ W w, int active)
741{ 1980{
1981 pri_adjust (EV_A_ w);
742 w->active = active; 1982 w->active = active;
1983 ev_ref (EV_A);
743} 1984}
744 1985
745static void 1986void inline_size
746ev_stop (W w) 1987ev_stop (EV_P_ W w)
747{ 1988{
1989 ev_unref (EV_A);
748 w->active = 0; 1990 w->active = 0;
749} 1991}
750 1992
751/*****************************************************************************/ 1993/*****************************************************************************/
752 1994
753void 1995void noinline
754ev_io_start (struct ev_io *w) 1996ev_io_start (EV_P_ ev_io *w)
755{ 1997{
1998 int fd = w->fd;
1999
756 if (ev_is_active (w)) 2000 if (expect_false (ev_is_active (w)))
757 return; 2001 return;
758 2002
759 int fd = w->fd; 2003 assert (("ev_io_start called with negative fd", fd >= 0));
760 2004
761 ev_start ((W)w, 1); 2005 ev_start (EV_A_ (W)w, 1);
762 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2006 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2007 wlist_add (&anfds[fd].head, (WL)w);
764 2008
765 fd_change (fd); 2009 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2010 w->events &= ~EV_IOFDSET;
766} 2011}
767 2012
768void 2013void noinline
769ev_io_stop (struct ev_io *w) 2014ev_io_stop (EV_P_ ev_io *w)
770{ 2015{
771 ev_clear ((W)w); 2016 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 2017 if (expect_false (!ev_is_active (w)))
773 return; 2018 return;
774 2019
2020 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2021
775 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2022 wlist_del (&anfds[w->fd].head, (WL)w);
776 ev_stop ((W)w); 2023 ev_stop (EV_A_ (W)w);
777 2024
778 fd_change (w->fd); 2025 fd_change (EV_A_ w->fd, 1);
779} 2026}
780 2027
781void 2028void noinline
782ev_timer_start (struct ev_timer *w) 2029ev_timer_start (EV_P_ ev_timer *w)
783{ 2030{
784 if (ev_is_active (w)) 2031 if (expect_false (ev_is_active (w)))
785 return; 2032 return;
786 2033
787 w->at += now; 2034 ev_at (w) += mn_now;
788 2035
789 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2036 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790 2037
791 ev_start ((W)w, ++timercnt); 2038 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
792 array_needsize (timers, timermax, timercnt, ); 2039 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
793 timers [timercnt - 1] = w; 2040 ANHE_w (timers [ev_active (w)]) = (WT)w;
794 upheap ((WT *)timers, timercnt - 1); 2041 ANHE_at_set (timers [ev_active (w)]);
795} 2042 upheap (timers, ev_active (w));
796 2043
797void 2044 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2045}
2046
2047void noinline
798ev_timer_stop (struct ev_timer *w) 2048ev_timer_stop (EV_P_ ev_timer *w)
799{ 2049{
800 ev_clear ((W)w); 2050 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 2051 if (expect_false (!ev_is_active (w)))
802 return; 2052 return;
803 2053
804 if (w->active < timercnt--) 2054 {
2055 int active = ev_active (w);
2056
2057 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2058
2059 if (expect_true (active < timercnt + HEAP0 - 1))
805 { 2060 {
806 timers [w->active - 1] = timers [timercnt]; 2061 timers [active] = timers [timercnt + HEAP0 - 1];
807 downheap ((WT *)timers, timercnt, w->active - 1); 2062 adjustheap (timers, timercnt, active);
808 } 2063 }
809 2064
810 w->at = w->repeat; 2065 --timercnt;
2066 }
811 2067
2068 ev_at (w) -= mn_now;
2069
812 ev_stop ((W)w); 2070 ev_stop (EV_A_ (W)w);
813} 2071}
814 2072
815void 2073void noinline
816ev_timer_again (struct ev_timer *w) 2074ev_timer_again (EV_P_ ev_timer *w)
817{ 2075{
818 if (ev_is_active (w)) 2076 if (ev_is_active (w))
819 { 2077 {
820 if (w->repeat) 2078 if (w->repeat)
821 { 2079 {
822 w->at = now + w->repeat; 2080 ev_at (w) = mn_now + w->repeat;
2081 ANHE_at_set (timers [ev_active (w)]);
823 downheap ((WT *)timers, timercnt, w->active - 1); 2082 adjustheap (timers, timercnt, ev_active (w));
824 } 2083 }
825 else 2084 else
826 ev_timer_stop (w); 2085 ev_timer_stop (EV_A_ w);
827 } 2086 }
828 else if (w->repeat) 2087 else if (w->repeat)
2088 {
2089 ev_at (w) = w->repeat;
829 ev_timer_start (w); 2090 ev_timer_start (EV_A_ w);
2091 }
830} 2092}
831 2093
832void 2094#if EV_PERIODIC_ENABLE
2095void noinline
833ev_periodic_start (struct ev_periodic *w) 2096ev_periodic_start (EV_P_ ev_periodic *w)
834{ 2097{
835 if (ev_is_active (w)) 2098 if (expect_false (ev_is_active (w)))
836 return; 2099 return;
837 2100
838 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2101 if (w->reschedule_cb)
839 2102 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2103 else if (w->interval)
2104 {
2105 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 */ 2106 /* 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; 2107 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2108 }
2109 else
2110 ev_at (w) = w->offset;
843 2111
844 ev_start ((W)w, ++periodiccnt); 2112 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
845 array_needsize (periodics, periodicmax, periodiccnt, ); 2113 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
846 periodics [periodiccnt - 1] = w; 2114 ANHE_w (periodics [ev_active (w)]) = (WT)w;
847 upheap ((WT *)periodics, periodiccnt - 1); 2115 ANHE_at_set (periodics [ev_active (w)]);
848} 2116 upheap (periodics, ev_active (w));
849 2117
850void 2118 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2119}
2120
2121void noinline
851ev_periodic_stop (struct ev_periodic *w) 2122ev_periodic_stop (EV_P_ ev_periodic *w)
852{ 2123{
853 ev_clear ((W)w); 2124 clear_pending (EV_A_ (W)w);
854 if (!ev_is_active (w)) 2125 if (expect_false (!ev_is_active (w)))
855 return; 2126 return;
856 2127
857 if (w->active < periodiccnt--) 2128 {
2129 int active = ev_active (w);
2130
2131 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2132
2133 if (expect_true (active < periodiccnt + HEAP0 - 1))
858 { 2134 {
859 periodics [w->active - 1] = periodics [periodiccnt]; 2135 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
860 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2136 adjustheap (periodics, periodiccnt, active);
861 } 2137 }
862 2138
2139 --periodiccnt;
2140 }
2141
863 ev_stop ((W)w); 2142 ev_stop (EV_A_ (W)w);
864} 2143}
865 2144
866void 2145void noinline
2146ev_periodic_again (EV_P_ ev_periodic *w)
2147{
2148 /* TODO: use adjustheap and recalculation */
2149 ev_periodic_stop (EV_A_ w);
2150 ev_periodic_start (EV_A_ w);
2151}
2152#endif
2153
2154#ifndef SA_RESTART
2155# define SA_RESTART 0
2156#endif
2157
2158void noinline
867ev_signal_start (struct ev_signal *w) 2159ev_signal_start (EV_P_ ev_signal *w)
868{ 2160{
2161#if EV_MULTIPLICITY
2162 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2163#endif
869 if (ev_is_active (w)) 2164 if (expect_false (ev_is_active (w)))
870 return; 2165 return;
871 2166
872 ev_start ((W)w, 1); 2167 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2168
2169 evpipe_init (EV_A);
2170
2171 {
2172#ifndef _WIN32
2173 sigset_t full, prev;
2174 sigfillset (&full);
2175 sigprocmask (SIG_SETMASK, &full, &prev);
2176#endif
2177
873 array_needsize (signals, signalmax, w->signum, signals_init); 2178 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2179
2180#ifndef _WIN32
2181 sigprocmask (SIG_SETMASK, &prev, 0);
2182#endif
2183 }
2184
2185 ev_start (EV_A_ (W)w, 1);
874 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2186 wlist_add (&signals [w->signum - 1].head, (WL)w);
875 2187
876 if (!w->next) 2188 if (!((WL)w)->next)
877 { 2189 {
2190#if _WIN32
2191 signal (w->signum, ev_sighandler);
2192#else
878 struct sigaction sa; 2193 struct sigaction sa;
879 sa.sa_handler = sighandler; 2194 sa.sa_handler = ev_sighandler;
880 sigfillset (&sa.sa_mask); 2195 sigfillset (&sa.sa_mask);
881 sa.sa_flags = 0; 2196 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882 sigaction (w->signum, &sa, 0); 2197 sigaction (w->signum, &sa, 0);
2198#endif
883 } 2199 }
884} 2200}
885 2201
886void 2202void noinline
887ev_signal_stop (struct ev_signal *w) 2203ev_signal_stop (EV_P_ ev_signal *w)
888{ 2204{
889 ev_clear ((W)w); 2205 clear_pending (EV_A_ (W)w);
890 if (!ev_is_active (w)) 2206 if (expect_false (!ev_is_active (w)))
891 return; 2207 return;
892 2208
893 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2209 wlist_del (&signals [w->signum - 1].head, (WL)w);
894 ev_stop ((W)w); 2210 ev_stop (EV_A_ (W)w);
895 2211
896 if (!signals [w->signum - 1].head) 2212 if (!signals [w->signum - 1].head)
897 signal (w->signum, SIG_DFL); 2213 signal (w->signum, SIG_DFL);
898} 2214}
899 2215
900void 2216void
901ev_idle_start (struct ev_idle *w) 2217ev_child_start (EV_P_ ev_child *w)
902{ 2218{
2219#if EV_MULTIPLICITY
2220 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2221#endif
903 if (ev_is_active (w)) 2222 if (expect_false (ev_is_active (w)))
904 return; 2223 return;
905 2224
906 ev_start ((W)w, ++idlecnt); 2225 ev_start (EV_A_ (W)w, 1);
907 array_needsize (idles, idlemax, idlecnt, ); 2226 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
908 idles [idlecnt - 1] = w;
909} 2227}
910 2228
911void 2229void
912ev_idle_stop (struct ev_idle *w) 2230ev_child_stop (EV_P_ ev_child *w)
913{ 2231{
914 ev_clear ((W)w); 2232 clear_pending (EV_A_ (W)w);
915 if (ev_is_active (w)) 2233 if (expect_false (!ev_is_active (w)))
916 return; 2234 return;
917 2235
918 idles [w->active - 1] = idles [--idlecnt]; 2236 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919 ev_stop ((W)w); 2237 ev_stop (EV_A_ (W)w);
920} 2238}
921 2239
922void 2240#if EV_STAT_ENABLE
923ev_prepare_start (struct ev_prepare *w) 2241
2242# ifdef _WIN32
2243# undef lstat
2244# define lstat(a,b) _stati64 (a,b)
2245# endif
2246
2247#define DEF_STAT_INTERVAL 5.0074891
2248#define MIN_STAT_INTERVAL 0.1074891
2249
2250static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2251
2252#if EV_USE_INOTIFY
2253# define EV_INOTIFY_BUFSIZE 8192
2254
2255static void noinline
2256infy_add (EV_P_ ev_stat *w)
924{ 2257{
925 if (ev_is_active (w)) 2258 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2259
2260 if (w->wd < 0)
2261 {
2262 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2263
2264 /* monitor some parent directory for speedup hints */
2265 /* note that exceeding the hardcoded limit is not a correctness issue, */
2266 /* but an efficiency issue only */
2267 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2268 {
2269 char path [4096];
2270 strcpy (path, w->path);
2271
2272 do
2273 {
2274 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2275 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2276
2277 char *pend = strrchr (path, '/');
2278
2279 if (!pend)
2280 break; /* whoops, no '/', complain to your admin */
2281
2282 *pend = 0;
2283 w->wd = inotify_add_watch (fs_fd, path, mask);
2284 }
2285 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2286 }
2287 }
2288 else
2289 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2290
2291 if (w->wd >= 0)
2292 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2293}
2294
2295static void noinline
2296infy_del (EV_P_ ev_stat *w)
2297{
2298 int slot;
2299 int wd = w->wd;
2300
2301 if (wd < 0)
926 return; 2302 return;
927 2303
2304 w->wd = -2;
2305 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2306 wlist_del (&fs_hash [slot].head, (WL)w);
2307
2308 /* remove this watcher, if others are watching it, they will rearm */
2309 inotify_rm_watch (fs_fd, wd);
2310}
2311
2312static void noinline
2313infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2314{
2315 if (slot < 0)
2316 /* overflow, need to check for all hahs slots */
2317 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2318 infy_wd (EV_A_ slot, wd, ev);
2319 else
2320 {
2321 WL w_;
2322
2323 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2324 {
2325 ev_stat *w = (ev_stat *)w_;
2326 w_ = w_->next; /* lets us remove this watcher and all before it */
2327
2328 if (w->wd == wd || wd == -1)
2329 {
2330 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2331 {
2332 w->wd = -1;
2333 infy_add (EV_A_ w); /* re-add, no matter what */
2334 }
2335
2336 stat_timer_cb (EV_A_ &w->timer, 0);
2337 }
2338 }
2339 }
2340}
2341
2342static void
2343infy_cb (EV_P_ ev_io *w, int revents)
2344{
2345 char buf [EV_INOTIFY_BUFSIZE];
2346 struct inotify_event *ev = (struct inotify_event *)buf;
2347 int ofs;
2348 int len = read (fs_fd, buf, sizeof (buf));
2349
2350 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2351 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2352}
2353
2354void inline_size
2355infy_init (EV_P)
2356{
2357 if (fs_fd != -2)
2358 return;
2359
2360 fs_fd = inotify_init ();
2361
2362 if (fs_fd >= 0)
2363 {
2364 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2365 ev_set_priority (&fs_w, EV_MAXPRI);
2366 ev_io_start (EV_A_ &fs_w);
2367 }
2368}
2369
2370void inline_size
2371infy_fork (EV_P)
2372{
2373 int slot;
2374
2375 if (fs_fd < 0)
2376 return;
2377
2378 close (fs_fd);
2379 fs_fd = inotify_init ();
2380
2381 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2382 {
2383 WL w_ = fs_hash [slot].head;
2384 fs_hash [slot].head = 0;
2385
2386 while (w_)
2387 {
2388 ev_stat *w = (ev_stat *)w_;
2389 w_ = w_->next; /* lets us add this watcher */
2390
2391 w->wd = -1;
2392
2393 if (fs_fd >= 0)
2394 infy_add (EV_A_ w); /* re-add, no matter what */
2395 else
2396 ev_timer_start (EV_A_ &w->timer);
2397 }
2398
2399 }
2400}
2401
2402#endif
2403
2404void
2405ev_stat_stat (EV_P_ ev_stat *w)
2406{
2407 if (lstat (w->path, &w->attr) < 0)
2408 w->attr.st_nlink = 0;
2409 else if (!w->attr.st_nlink)
2410 w->attr.st_nlink = 1;
2411}
2412
2413static void noinline
2414stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2415{
2416 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2417
2418 /* we copy this here each the time so that */
2419 /* prev has the old value when the callback gets invoked */
2420 w->prev = w->attr;
2421 ev_stat_stat (EV_A_ w);
2422
2423 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2424 if (
2425 w->prev.st_dev != w->attr.st_dev
2426 || w->prev.st_ino != w->attr.st_ino
2427 || w->prev.st_mode != w->attr.st_mode
2428 || w->prev.st_nlink != w->attr.st_nlink
2429 || w->prev.st_uid != w->attr.st_uid
2430 || w->prev.st_gid != w->attr.st_gid
2431 || w->prev.st_rdev != w->attr.st_rdev
2432 || w->prev.st_size != w->attr.st_size
2433 || w->prev.st_atime != w->attr.st_atime
2434 || w->prev.st_mtime != w->attr.st_mtime
2435 || w->prev.st_ctime != w->attr.st_ctime
2436 ) {
2437 #if EV_USE_INOTIFY
2438 infy_del (EV_A_ w);
2439 infy_add (EV_A_ w);
2440 ev_stat_stat (EV_A_ w); /* avoid race... */
2441 #endif
2442
2443 ev_feed_event (EV_A_ w, EV_STAT);
2444 }
2445}
2446
2447void
2448ev_stat_start (EV_P_ ev_stat *w)
2449{
2450 if (expect_false (ev_is_active (w)))
2451 return;
2452
2453 /* since we use memcmp, we need to clear any padding data etc. */
2454 memset (&w->prev, 0, sizeof (ev_statdata));
2455 memset (&w->attr, 0, sizeof (ev_statdata));
2456
2457 ev_stat_stat (EV_A_ w);
2458
2459 if (w->interval < MIN_STAT_INTERVAL)
2460 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2461
2462 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2463 ev_set_priority (&w->timer, ev_priority (w));
2464
2465#if EV_USE_INOTIFY
2466 infy_init (EV_A);
2467
2468 if (fs_fd >= 0)
2469 infy_add (EV_A_ w);
2470 else
2471#endif
2472 ev_timer_start (EV_A_ &w->timer);
2473
2474 ev_start (EV_A_ (W)w, 1);
2475}
2476
2477void
2478ev_stat_stop (EV_P_ ev_stat *w)
2479{
2480 clear_pending (EV_A_ (W)w);
2481 if (expect_false (!ev_is_active (w)))
2482 return;
2483
2484#if EV_USE_INOTIFY
2485 infy_del (EV_A_ w);
2486#endif
2487 ev_timer_stop (EV_A_ &w->timer);
2488
2489 ev_stop (EV_A_ (W)w);
2490}
2491#endif
2492
2493#if EV_IDLE_ENABLE
2494void
2495ev_idle_start (EV_P_ ev_idle *w)
2496{
2497 if (expect_false (ev_is_active (w)))
2498 return;
2499
2500 pri_adjust (EV_A_ (W)w);
2501
2502 {
2503 int active = ++idlecnt [ABSPRI (w)];
2504
2505 ++idleall;
2506 ev_start (EV_A_ (W)w, active);
2507
2508 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2509 idles [ABSPRI (w)][active - 1] = w;
2510 }
2511}
2512
2513void
2514ev_idle_stop (EV_P_ ev_idle *w)
2515{
2516 clear_pending (EV_A_ (W)w);
2517 if (expect_false (!ev_is_active (w)))
2518 return;
2519
2520 {
2521 int active = ev_active (w);
2522
2523 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2524 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2525
2526 ev_stop (EV_A_ (W)w);
2527 --idleall;
2528 }
2529}
2530#endif
2531
2532void
2533ev_prepare_start (EV_P_ ev_prepare *w)
2534{
2535 if (expect_false (ev_is_active (w)))
2536 return;
2537
928 ev_start ((W)w, ++preparecnt); 2538 ev_start (EV_A_ (W)w, ++preparecnt);
929 array_needsize (prepares, preparemax, preparecnt, ); 2539 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930 prepares [preparecnt - 1] = w; 2540 prepares [preparecnt - 1] = w;
931} 2541}
932 2542
933void 2543void
934ev_prepare_stop (struct ev_prepare *w) 2544ev_prepare_stop (EV_P_ ev_prepare *w)
935{ 2545{
936 ev_clear ((W)w); 2546 clear_pending (EV_A_ (W)w);
937 if (ev_is_active (w)) 2547 if (expect_false (!ev_is_active (w)))
938 return; 2548 return;
939 2549
2550 {
2551 int active = ev_active (w);
2552
940 prepares [w->active - 1] = prepares [--preparecnt]; 2553 prepares [active - 1] = prepares [--preparecnt];
2554 ev_active (prepares [active - 1]) = active;
2555 }
2556
941 ev_stop ((W)w); 2557 ev_stop (EV_A_ (W)w);
942} 2558}
943 2559
944void 2560void
945ev_check_start (struct ev_check *w) 2561ev_check_start (EV_P_ ev_check *w)
946{ 2562{
947 if (ev_is_active (w)) 2563 if (expect_false (ev_is_active (w)))
948 return; 2564 return;
949 2565
950 ev_start ((W)w, ++checkcnt); 2566 ev_start (EV_A_ (W)w, ++checkcnt);
951 array_needsize (checks, checkmax, checkcnt, ); 2567 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952 checks [checkcnt - 1] = w; 2568 checks [checkcnt - 1] = w;
953} 2569}
954 2570
955void 2571void
956ev_check_stop (struct ev_check *w) 2572ev_check_stop (EV_P_ ev_check *w)
957{ 2573{
958 ev_clear ((W)w); 2574 clear_pending (EV_A_ (W)w);
959 if (ev_is_active (w)) 2575 if (expect_false (!ev_is_active (w)))
960 return; 2576 return;
961 2577
2578 {
2579 int active = ev_active (w);
2580
962 checks [w->active - 1] = checks [--checkcnt]; 2581 checks [active - 1] = checks [--checkcnt];
2582 ev_active (checks [active - 1]) = active;
2583 }
2584
963 ev_stop ((W)w); 2585 ev_stop (EV_A_ (W)w);
964} 2586}
965 2587
966void 2588#if EV_EMBED_ENABLE
967ev_child_start (struct ev_child *w) 2589void noinline
2590ev_embed_sweep (EV_P_ ev_embed *w)
968{ 2591{
2592 ev_loop (w->other, EVLOOP_NONBLOCK);
2593}
2594
2595static void
2596embed_io_cb (EV_P_ ev_io *io, int revents)
2597{
2598 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2599
969 if (ev_is_active (w)) 2600 if (ev_cb (w))
2601 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2602 else
2603 ev_loop (w->other, EVLOOP_NONBLOCK);
2604}
2605
2606static void
2607embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2608{
2609 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2610
2611 {
2612 struct ev_loop *loop = w->other;
2613
2614 while (fdchangecnt)
2615 {
2616 fd_reify (EV_A);
2617 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2618 }
2619 }
2620}
2621
2622#if 0
2623static void
2624embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2625{
2626 ev_idle_stop (EV_A_ idle);
2627}
2628#endif
2629
2630void
2631ev_embed_start (EV_P_ ev_embed *w)
2632{
2633 if (expect_false (ev_is_active (w)))
970 return; 2634 return;
971 2635
2636 {
2637 struct ev_loop *loop = w->other;
2638 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2639 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2640 }
2641
2642 ev_set_priority (&w->io, ev_priority (w));
2643 ev_io_start (EV_A_ &w->io);
2644
2645 ev_prepare_init (&w->prepare, embed_prepare_cb);
2646 ev_set_priority (&w->prepare, EV_MINPRI);
2647 ev_prepare_start (EV_A_ &w->prepare);
2648
2649 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2650
972 ev_start ((W)w, 1); 2651 ev_start (EV_A_ (W)w, 1);
973 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974} 2652}
975 2653
976void 2654void
977ev_child_stop (struct ev_child *w) 2655ev_embed_stop (EV_P_ ev_embed *w)
978{ 2656{
979 ev_clear ((W)w); 2657 clear_pending (EV_A_ (W)w);
980 if (ev_is_active (w)) 2658 if (expect_false (!ev_is_active (w)))
981 return; 2659 return;
982 2660
983 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2661 ev_io_stop (EV_A_ &w->io);
2662 ev_prepare_stop (EV_A_ &w->prepare);
2663
984 ev_stop ((W)w); 2664 ev_stop (EV_A_ (W)w);
985} 2665}
2666#endif
2667
2668#if EV_FORK_ENABLE
2669void
2670ev_fork_start (EV_P_ ev_fork *w)
2671{
2672 if (expect_false (ev_is_active (w)))
2673 return;
2674
2675 ev_start (EV_A_ (W)w, ++forkcnt);
2676 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2677 forks [forkcnt - 1] = w;
2678}
2679
2680void
2681ev_fork_stop (EV_P_ ev_fork *w)
2682{
2683 clear_pending (EV_A_ (W)w);
2684 if (expect_false (!ev_is_active (w)))
2685 return;
2686
2687 {
2688 int active = ev_active (w);
2689
2690 forks [active - 1] = forks [--forkcnt];
2691 ev_active (forks [active - 1]) = active;
2692 }
2693
2694 ev_stop (EV_A_ (W)w);
2695}
2696#endif
2697
2698#if EV_ASYNC_ENABLE
2699void
2700ev_async_start (EV_P_ ev_async *w)
2701{
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 evpipe_init (EV_A);
2706
2707 ev_start (EV_A_ (W)w, ++asynccnt);
2708 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2709 asyncs [asynccnt - 1] = w;
2710}
2711
2712void
2713ev_async_stop (EV_P_ ev_async *w)
2714{
2715 clear_pending (EV_A_ (W)w);
2716 if (expect_false (!ev_is_active (w)))
2717 return;
2718
2719 {
2720 int active = ev_active (w);
2721
2722 asyncs [active - 1] = asyncs [--asynccnt];
2723 ev_active (asyncs [active - 1]) = active;
2724 }
2725
2726 ev_stop (EV_A_ (W)w);
2727}
2728
2729void
2730ev_async_send (EV_P_ ev_async *w)
2731{
2732 w->sent = 1;
2733 evpipe_write (EV_A_ &gotasync);
2734}
2735#endif
986 2736
987/*****************************************************************************/ 2737/*****************************************************************************/
988 2738
989struct ev_once 2739struct ev_once
990{ 2740{
991 struct ev_io io; 2741 ev_io io;
992 struct ev_timer to; 2742 ev_timer to;
993 void (*cb)(int revents, void *arg); 2743 void (*cb)(int revents, void *arg);
994 void *arg; 2744 void *arg;
995}; 2745};
996 2746
997static void 2747static void
998once_cb (struct ev_once *once, int revents) 2748once_cb (EV_P_ struct ev_once *once, int revents)
999{ 2749{
1000 void (*cb)(int revents, void *arg) = once->cb; 2750 void (*cb)(int revents, void *arg) = once->cb;
1001 void *arg = once->arg; 2751 void *arg = once->arg;
1002 2752
1003 ev_io_stop (&once->io); 2753 ev_io_stop (EV_A_ &once->io);
1004 ev_timer_stop (&once->to); 2754 ev_timer_stop (EV_A_ &once->to);
1005 free (once); 2755 ev_free (once);
1006 2756
1007 cb (revents, arg); 2757 cb (revents, arg);
1008} 2758}
1009 2759
1010static void 2760static void
1011once_cb_io (struct ev_io *w, int revents) 2761once_cb_io (EV_P_ ev_io *w, int revents)
1012{ 2762{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2763 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014} 2764}
1015 2765
1016static void 2766static void
1017once_cb_to (struct ev_timer *w, int revents) 2767once_cb_to (EV_P_ ev_timer *w, int revents)
1018{ 2768{
1019 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2769 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020} 2770}
1021 2771
1022void 2772void
1023ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2773ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024{ 2774{
1025 struct ev_once *once = malloc (sizeof (struct ev_once)); 2775 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026 2776
1027 if (!once) 2777 if (expect_false (!once))
2778 {
1028 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2779 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029 else 2780 return;
1030 { 2781 }
2782
1031 once->cb = cb; 2783 once->cb = cb;
1032 once->arg = arg; 2784 once->arg = arg;
1033 2785
1034 ev_watcher_init (&once->io, once_cb_io); 2786 ev_init (&once->io, once_cb_io);
1035 if (fd >= 0) 2787 if (fd >= 0)
1036 { 2788 {
1037 ev_io_set (&once->io, fd, events); 2789 ev_io_set (&once->io, fd, events);
1038 ev_io_start (&once->io); 2790 ev_io_start (EV_A_ &once->io);
1039 } 2791 }
1040 2792
1041 ev_watcher_init (&once->to, once_cb_to); 2793 ev_init (&once->to, once_cb_to);
1042 if (timeout >= 0.) 2794 if (timeout >= 0.)
1043 { 2795 {
1044 ev_timer_set (&once->to, timeout, 0.); 2796 ev_timer_set (&once->to, timeout, 0.);
1045 ev_timer_start (&once->to); 2797 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 { 2798 }
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} 2799}
1127 2800
2801#if EV_MULTIPLICITY
2802 #include "ev_wrap.h"
1128#endif 2803#endif
1129 2804
2805#ifdef __cplusplus
2806}
2807#endif
1130 2808
1131
1132

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