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Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.278 by root, Tue Jan 6 19:46:56 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
69# define EV_USE_REALTIME 1
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
144#endif
29 145
30#include <math.h> 146#include <math.h>
31#include <stdlib.h> 147#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 148#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 149#include <stddef.h>
36 150
37#include <stdio.h> 151#include <stdio.h>
38 152
39#include <assert.h> 153#include <assert.h>
40#include <errno.h> 154#include <errno.h>
41#include <sys/types.h> 155#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 156#include <time.h>
45 157
46#ifndef HAVE_MONOTONIC 158#include <signal.h>
47# ifdef CLOCK_MONOTONIC 159
48# define HAVE_MONOTONIC 1 160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
49# endif 176# endif
50#endif 177#endif
51 178
52#ifndef HAVE_SELECT 179/* this block tries to deduce configuration from header-defined symbols and defaults */
53# define HAVE_SELECT 1 180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
54#endif 186# endif
187#endif
55 188
56#ifndef HAVE_EPOLL 189#ifndef EV_USE_MONOTONIC
57# define HAVE_EPOLL 0 190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
58#endif 194# endif
195#endif
59 196
60#ifndef HAVE_REALTIME 197#ifndef EV_USE_REALTIME
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 198# define EV_USE_REALTIME 0
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
62#endif 206# endif
207#endif
208
209#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1
211#endif
212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
225# define EV_USE_EPOLL 0
226# endif
227#endif
228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288
289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0
292#endif
293
294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
296# define EV_USE_REALTIME 0
297#endif
298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 363
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 367
68#include "ev.h" 368#if __GNUC__ >= 4
369# define expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else
372# define expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
377#endif
69 378
379#define expect_false(expr) expect ((expr) != 0, 0)
380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
70typedef struct ev_watcher *W; 395typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
73 398
74static ev_tstamp now, diff; /* monotonic clock */ 399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_MONOTONIC
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
406#endif
407
408#ifdef _WIN32
409# include "ev_win32.c"
410#endif
411
412/*****************************************************************************/
413
414static void (*syserr_cb)(const char *msg);
415
416void
417ev_set_syserr_cb (void (*cb)(const char *msg))
418{
419 syserr_cb = cb;
420}
421
422static void noinline
423ev_syserr (const char *msg)
424{
425 if (!msg)
426 msg = "(libev) system error";
427
428 if (syserr_cb)
429 syserr_cb (msg);
430 else
431 {
432 perror (msg);
433 abort ();
434 }
435}
436
437static void *
438ev_realloc_emul (void *ptr, long size)
439{
440 /* some systems, notably openbsd and darwin, fail to properly
441 * implement realloc (x, 0) (as required by both ansi c-98 and
442 * the single unix specification, so work around them here.
443 */
444
445 if (size)
446 return realloc (ptr, size);
447
448 free (ptr);
449 return 0;
450}
451
452static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
453
454void
455ev_set_allocator (void *(*cb)(void *ptr, long size))
456{
457 alloc = cb;
458}
459
460inline_speed void *
461ev_realloc (void *ptr, long size)
462{
463 ptr = alloc (ptr, size);
464
465 if (!ptr && size)
466 {
467 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
468 abort ();
469 }
470
471 return ptr;
472}
473
474#define ev_malloc(size) ev_realloc (0, (size))
475#define ev_free(ptr) ev_realloc ((ptr), 0)
476
477/*****************************************************************************/
478
479typedef struct
480{
481 WL head;
482 unsigned char events;
483 unsigned char reify;
484 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
485 unsigned char unused;
486#if EV_USE_EPOLL
487 unsigned int egen; /* generation counter to counter epoll bugs */
488#endif
489#if EV_SELECT_IS_WINSOCKET
490 SOCKET handle;
491#endif
492} ANFD;
493
494typedef struct
495{
496 W w;
497 int events;
498} ANPENDING;
499
500#if EV_USE_INOTIFY
501/* hash table entry per inotify-id */
502typedef struct
503{
504 WL head;
505} ANFS;
506#endif
507
508/* Heap Entry */
509#if EV_HEAP_CACHE_AT
510 typedef struct {
511 ev_tstamp at;
512 WT w;
513 } ANHE;
514
515 #define ANHE_w(he) (he).w /* access watcher, read-write */
516 #define ANHE_at(he) (he).at /* access cached at, read-only */
517 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
518#else
519 typedef WT ANHE;
520
521 #define ANHE_w(he) (he)
522 #define ANHE_at(he) (he)->at
523 #define ANHE_at_cache(he)
524#endif
525
526#if EV_MULTIPLICITY
527
528 struct ev_loop
529 {
530 ev_tstamp ev_rt_now;
531 #define ev_rt_now ((loop)->ev_rt_now)
532 #define VAR(name,decl) decl;
533 #include "ev_vars.h"
534 #undef VAR
535 };
536 #include "ev_wrap.h"
537
538 static struct ev_loop default_loop_struct;
539 struct ev_loop *ev_default_loop_ptr;
540
541#else
542
75ev_tstamp ev_now; 543 ev_tstamp ev_rt_now;
76int ev_method; 544 #define VAR(name,decl) static decl;
545 #include "ev_vars.h"
546 #undef VAR
77 547
78static int have_monotonic; /* runtime */ 548 static int ev_default_loop_ptr;
79 549
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 550#endif
81static void (*method_modify)(int fd, int oev, int nev);
82static void (*method_poll)(ev_tstamp timeout);
83 551
84/*****************************************************************************/ 552/*****************************************************************************/
85 553
86ev_tstamp 554ev_tstamp
87ev_time (void) 555ev_time (void)
88{ 556{
89#if HAVE_REALTIME 557#if EV_USE_REALTIME
90 struct timespec ts; 558 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 559 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 560 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 561#else
94 struct timeval tv; 562 struct timeval tv;
95 gettimeofday (&tv, 0); 563 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 564 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif 565#endif
98} 566}
99 567
100static ev_tstamp 568ev_tstamp inline_size
101get_clock (void) 569get_clock (void)
102{ 570{
103#if HAVE_MONOTONIC 571#if EV_USE_MONOTONIC
104 if (have_monotonic) 572 if (expect_true (have_monotonic))
105 { 573 {
106 struct timespec ts; 574 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 575 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 576 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 577 }
110#endif 578#endif
111 579
112 return ev_time (); 580 return ev_time ();
113} 581}
114 582
115#define array_needsize(base,cur,cnt,init) \ 583#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 584ev_tstamp
117 { \ 585ev_now (EV_P)
118 int newcnt = cur; \ 586{
119 do \ 587 return ev_rt_now;
120 { \ 588}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 589#endif
122 } \ 590
123 while ((cnt) > newcnt); \ 591void
124 \ 592ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 593{
126 init (base + cur, newcnt - cur); \ 594 if (delay > 0.)
127 cur = newcnt; \
128 } 595 {
596#if EV_USE_NANOSLEEP
597 struct timespec ts;
598
599 ts.tv_sec = (time_t)delay;
600 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
601
602 nanosleep (&ts, 0);
603#elif defined(_WIN32)
604 Sleep ((unsigned long)(delay * 1e3));
605#else
606 struct timeval tv;
607
608 tv.tv_sec = (time_t)delay;
609 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
610
611 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
612 /* somehting nto guaranteed by newer posix versions, but guaranteed */
613 /* by older ones */
614 select (0, 0, 0, 0, &tv);
615#endif
616 }
617}
129 618
130/*****************************************************************************/ 619/*****************************************************************************/
131 620
132typedef struct 621#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
133{
134 struct ev_io *head;
135 int events;
136} ANFD;
137 622
138static ANFD *anfds; 623int inline_size
139static int anfdmax; 624array_nextsize (int elem, int cur, int cnt)
140
141static void
142anfds_init (ANFD *base, int count)
143{ 625{
144 while (count--) 626 int ncur = cur + 1;
145 { 627
146 base->head = 0; 628 do
147 base->events = EV_NONE; 629 ncur <<= 1;
148 ++base; 630 while (cnt > ncur);
631
632 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
633 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
149 } 634 {
150} 635 ncur *= elem;
151 636 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
152typedef struct 637 ncur = ncur - sizeof (void *) * 4;
153{ 638 ncur /= elem;
154 W w;
155 int events;
156} ANPENDING;
157
158static ANPENDING *pendings;
159static int pendingmax, pendingcnt;
160
161static void
162event (W w, int events)
163{
164 if (w->active)
165 { 639 }
640
641 return ncur;
642}
643
644static noinline void *
645array_realloc (int elem, void *base, int *cur, int cnt)
646{
647 *cur = array_nextsize (elem, *cur, cnt);
648 return ev_realloc (base, elem * *cur);
649}
650
651#define array_init_zero(base,count) \
652 memset ((void *)(base), 0, sizeof (*(base)) * (count))
653
654#define array_needsize(type,base,cur,cnt,init) \
655 if (expect_false ((cnt) > (cur))) \
656 { \
657 int ocur_ = (cur); \
658 (base) = (type *)array_realloc \
659 (sizeof (type), (base), &(cur), (cnt)); \
660 init ((base) + (ocur_), (cur) - ocur_); \
661 }
662
663#if 0
664#define array_slim(type,stem) \
665 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
666 { \
667 stem ## max = array_roundsize (stem ## cnt >> 1); \
668 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
669 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
670 }
671#endif
672
673#define array_free(stem, idx) \
674 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
675
676/*****************************************************************************/
677
678void noinline
679ev_feed_event (EV_P_ void *w, int revents)
680{
681 W w_ = (W)w;
682 int pri = ABSPRI (w_);
683
684 if (expect_false (w_->pending))
685 pendings [pri][w_->pending - 1].events |= revents;
686 else
687 {
166 w->pending = ++pendingcnt; 688 w_->pending = ++pendingcnt [pri];
167 array_needsize (pendings, pendingmax, pendingcnt, ); 689 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
168 pendings [pendingcnt - 1].w = w; 690 pendings [pri][w_->pending - 1].w = w_;
169 pendings [pendingcnt - 1].events = events; 691 pendings [pri][w_->pending - 1].events = revents;
170 } 692 }
171} 693}
172 694
173static void 695void inline_speed
174queue_events (W *events, int eventcnt, int type) 696queue_events (EV_P_ W *events, int eventcnt, int type)
175{ 697{
176 int i; 698 int i;
177 699
178 for (i = 0; i < eventcnt; ++i) 700 for (i = 0; i < eventcnt; ++i)
179 event (events [i], type); 701 ev_feed_event (EV_A_ events [i], type);
180} 702}
181 703
182static void 704/*****************************************************************************/
705
706void inline_speed
183fd_event (int fd, int events) 707fd_event (EV_P_ int fd, int revents)
184{ 708{
185 ANFD *anfd = anfds + fd; 709 ANFD *anfd = anfds + fd;
186 struct ev_io *w; 710 ev_io *w;
187 711
188 for (w = anfd->head; w; w = w->next) 712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
189 { 713 {
190 int ev = w->events & events; 714 int ev = w->events & revents;
191 715
192 if (ev) 716 if (ev)
193 event ((W)w, ev); 717 ev_feed_event (EV_A_ (W)w, ev);
194 } 718 }
195} 719}
196 720
197/*****************************************************************************/ 721void
722ev_feed_fd_event (EV_P_ int fd, int revents)
723{
724 if (fd >= 0 && fd < anfdmax)
725 fd_event (EV_A_ fd, revents);
726}
198 727
199static int *fdchanges; 728void inline_size
200static int fdchangemax, fdchangecnt; 729fd_reify (EV_P)
201
202static void
203fd_reify (void)
204{ 730{
205 int i; 731 int i;
206 732
207 for (i = 0; i < fdchangecnt; ++i) 733 for (i = 0; i < fdchangecnt; ++i)
208 { 734 {
209 int fd = fdchanges [i]; 735 int fd = fdchanges [i];
210 ANFD *anfd = anfds + fd; 736 ANFD *anfd = anfds + fd;
211 struct ev_io *w; 737 ev_io *w;
212 738
213 int events = 0; 739 unsigned char events = 0;
214 740
215 for (w = anfd->head; w; w = w->next) 741 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
216 events |= w->events; 742 events |= (unsigned char)w->events;
217 743
218 anfd->events &= ~EV_REIFY; 744#if EV_SELECT_IS_WINSOCKET
219 745 if (events)
220 if (anfd->events != events)
221 { 746 {
222 method_modify (fd, anfd->events, events); 747 unsigned long arg;
223 anfd->events = events; 748 #ifdef EV_FD_TO_WIN32_HANDLE
749 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
750 #else
751 anfd->handle = _get_osfhandle (fd);
752 #endif
753 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
224 } 754 }
755#endif
756
757 {
758 unsigned char o_events = anfd->events;
759 unsigned char o_reify = anfd->reify;
760
761 anfd->reify = 0;
762 anfd->events = events;
763
764 if (o_events != events || o_reify & EV_IOFDSET)
765 backend_modify (EV_A_ fd, o_events, events);
766 }
225 } 767 }
226 768
227 fdchangecnt = 0; 769 fdchangecnt = 0;
228} 770}
229 771
230static void 772void inline_size
231fd_change (int fd) 773fd_change (EV_P_ int fd, int flags)
232{ 774{
233 if (anfds [fd].events & EV_REIFY) 775 unsigned char reify = anfds [fd].reify;
234 return; 776 anfds [fd].reify |= flags;
235 777
236 anfds [fd].events |= EV_REIFY; 778 if (expect_true (!reify))
237 779 {
238 ++fdchangecnt; 780 ++fdchangecnt;
239 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 781 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240 fdchanges [fdchangecnt - 1] = fd; 782 fdchanges [fdchangecnt - 1] = fd;
783 }
784}
785
786void inline_speed
787fd_kill (EV_P_ int fd)
788{
789 ev_io *w;
790
791 while ((w = (ev_io *)anfds [fd].head))
792 {
793 ev_io_stop (EV_A_ w);
794 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
795 }
796}
797
798int inline_size
799fd_valid (int fd)
800{
801#ifdef _WIN32
802 return _get_osfhandle (fd) != -1;
803#else
804 return fcntl (fd, F_GETFD) != -1;
805#endif
241} 806}
242 807
243/* called on EBADF to verify fds */ 808/* called on EBADF to verify fds */
244static void 809static void noinline
245fd_recheck (void) 810fd_ebadf (EV_P)
246{ 811{
247 int fd; 812 int fd;
248 813
249 for (fd = 0; fd < anfdmax; ++fd) 814 for (fd = 0; fd < anfdmax; ++fd)
250 if (anfds [fd].events) 815 if (anfds [fd].events)
251 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 816 if (!fd_valid (fd) && errno == EBADF)
252 while (anfds [fd].head) 817 fd_kill (EV_A_ fd);
818}
819
820/* called on ENOMEM in select/poll to kill some fds and retry */
821static void noinline
822fd_enomem (EV_P)
823{
824 int fd;
825
826 for (fd = anfdmax; fd--; )
827 if (anfds [fd].events)
253 { 828 {
254 event ((W)anfds [fd].head, EV_ERROR); 829 fd_kill (EV_A_ fd);
255 ev_io_stop (anfds [fd].head); 830 return;
256 } 831 }
832}
833
834/* usually called after fork if backend needs to re-arm all fds from scratch */
835static void noinline
836fd_rearm_all (EV_P)
837{
838 int fd;
839
840 for (fd = 0; fd < anfdmax; ++fd)
841 if (anfds [fd].events)
842 {
843 anfds [fd].events = 0;
844 anfds [fd].emask = 0;
845 fd_change (EV_A_ fd, EV_IOFDSET | 1);
846 }
257} 847}
258 848
259/*****************************************************************************/ 849/*****************************************************************************/
260 850
261static struct ev_timer **timers; 851/*
262static int timermax, timercnt; 852 * the heap functions want a real array index. array index 0 uis guaranteed to not
853 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
854 * the branching factor of the d-tree.
855 */
263 856
264static struct ev_periodic **periodics; 857/*
265static int periodicmax, periodiccnt; 858 * at the moment we allow libev the luxury of two heaps,
859 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
860 * which is more cache-efficient.
861 * the difference is about 5% with 50000+ watchers.
862 */
863#if EV_USE_4HEAP
266 864
267static void 865#define DHEAP 4
268upheap (WT *timers, int k) 866#define HEAP0 (DHEAP - 1) /* index of first element in heap */
269{ 867#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
270 WT w = timers [k]; 868#define UPHEAP_DONE(p,k) ((p) == (k))
271 869
272 while (k && timers [k >> 1]->at > w->at) 870/* away from the root */
273 { 871void inline_speed
274 timers [k] = timers [k >> 1];
275 timers [k]->active = k + 1;
276 k >>= 1;
277 }
278
279 timers [k] = w;
280 timers [k]->active = k + 1;
281
282}
283
284static void
285downheap (WT *timers, int N, int k) 872downheap (ANHE *heap, int N, int k)
286{ 873{
287 WT w = timers [k]; 874 ANHE he = heap [k];
875 ANHE *E = heap + N + HEAP0;
288 876
289 while (k < (N >> 1)) 877 for (;;)
290 { 878 {
291 int j = k << 1; 879 ev_tstamp minat;
880 ANHE *minpos;
881 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
292 882
293 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 883 /* find minimum child */
884 if (expect_true (pos + DHEAP - 1 < E))
294 ++j; 885 {
295 886 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
296 if (w->at <= timers [j]->at) 887 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
888 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
889 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
890 }
891 else if (pos < E)
892 {
893 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else
297 break; 899 break;
298 900
299 timers [k] = timers [j]; 901 if (ANHE_at (he) <= minat)
300 timers [k]->active = k + 1; 902 break;
903
904 heap [k] = *minpos;
905 ev_active (ANHE_w (*minpos)) = k;
906
907 k = minpos - heap;
908 }
909
910 heap [k] = he;
911 ev_active (ANHE_w (he)) = k;
912}
913
914#else /* 4HEAP */
915
916#define HEAP0 1
917#define HPARENT(k) ((k) >> 1)
918#define UPHEAP_DONE(p,k) (!(p))
919
920/* away from the root */
921void inline_speed
922downheap (ANHE *heap, int N, int k)
923{
924 ANHE he = heap [k];
925
926 for (;;)
927 {
928 int c = k << 1;
929
930 if (c > N + HEAP0 - 1)
931 break;
932
933 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
934 ? 1 : 0;
935
936 if (ANHE_at (he) <= ANHE_at (heap [c]))
937 break;
938
939 heap [k] = heap [c];
940 ev_active (ANHE_w (heap [k])) = k;
941
301 k = j; 942 k = c;
943 }
944
945 heap [k] = he;
946 ev_active (ANHE_w (he)) = k;
947}
948#endif
949
950/* towards the root */
951void inline_speed
952upheap (ANHE *heap, int k)
953{
954 ANHE he = heap [k];
955
956 for (;;)
302 } 957 {
958 int p = HPARENT (k);
303 959
304 timers [k] = w; 960 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
305 timers [k]->active = k + 1; 961 break;
962
963 heap [k] = heap [p];
964 ev_active (ANHE_w (heap [k])) = k;
965 k = p;
966 }
967
968 heap [k] = he;
969 ev_active (ANHE_w (he)) = k;
970}
971
972void inline_size
973adjustheap (ANHE *heap, int N, int k)
974{
975 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
976 upheap (heap, k);
977 else
978 downheap (heap, N, k);
979}
980
981/* rebuild the heap: this function is used only once and executed rarely */
982void inline_size
983reheap (ANHE *heap, int N)
984{
985 int i;
986
987 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
988 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
989 for (i = 0; i < N; ++i)
990 upheap (heap, i + HEAP0);
306} 991}
307 992
308/*****************************************************************************/ 993/*****************************************************************************/
309 994
310typedef struct 995typedef struct
311{ 996{
312 struct ev_signal *head; 997 WL head;
313 sig_atomic_t gotsig; 998 EV_ATOMIC_T gotsig;
314} ANSIG; 999} ANSIG;
315 1000
316static ANSIG *signals; 1001static ANSIG *signals;
317static int signalmax; 1002static int signalmax;
318 1003
319static int sigpipe [2]; 1004static EV_ATOMIC_T gotsig;
320static sig_atomic_t gotsig; 1005
321static struct ev_io sigev; 1006/*****************************************************************************/
1007
1008void inline_speed
1009fd_intern (int fd)
1010{
1011#ifdef _WIN32
1012 unsigned long arg = 1;
1013 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1014#else
1015 fcntl (fd, F_SETFD, FD_CLOEXEC);
1016 fcntl (fd, F_SETFL, O_NONBLOCK);
1017#endif
1018}
1019
1020static void noinline
1021evpipe_init (EV_P)
1022{
1023 if (!ev_is_active (&pipeev))
1024 {
1025#if EV_USE_EVENTFD
1026 if ((evfd = eventfd (0, 0)) >= 0)
1027 {
1028 evpipe [0] = -1;
1029 fd_intern (evfd);
1030 ev_io_set (&pipeev, evfd, EV_READ);
1031 }
1032 else
1033#endif
1034 {
1035 while (pipe (evpipe))
1036 ev_syserr ("(libev) error creating signal/async pipe");
1037
1038 fd_intern (evpipe [0]);
1039 fd_intern (evpipe [1]);
1040 ev_io_set (&pipeev, evpipe [0], EV_READ);
1041 }
1042
1043 ev_io_start (EV_A_ &pipeev);
1044 ev_unref (EV_A); /* watcher should not keep loop alive */
1045 }
1046}
1047
1048void inline_size
1049evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1050{
1051 if (!*flag)
1052 {
1053 int old_errno = errno; /* save errno because write might clobber it */
1054
1055 *flag = 1;
1056
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter = 1;
1061 write (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 write (evpipe [1], &old_errno, 1);
1066
1067 errno = old_errno;
1068 }
1069}
322 1070
323static void 1071static void
324signals_init (ANSIG *base, int count) 1072pipecb (EV_P_ ev_io *iow, int revents)
325{ 1073{
326 while (count--) 1074#if EV_USE_EVENTFD
1075 if (evfd >= 0)
1076 {
1077 uint64_t counter;
1078 read (evfd, &counter, sizeof (uint64_t));
327 { 1079 }
328 base->head = 0; 1080 else
1081#endif
1082 {
1083 char dummy;
1084 read (evpipe [0], &dummy, 1);
1085 }
1086
1087 if (gotsig && ev_is_default_loop (EV_A))
1088 {
1089 int signum;
329 base->gotsig = 0; 1090 gotsig = 0;
330 ++base; 1091
1092 for (signum = signalmax; signum--; )
1093 if (signals [signum].gotsig)
1094 ev_feed_signal_event (EV_A_ signum + 1);
1095 }
1096
1097#if EV_ASYNC_ENABLE
1098 if (gotasync)
331 } 1099 {
1100 int i;
1101 gotasync = 0;
1102
1103 for (i = asynccnt; i--; )
1104 if (asyncs [i]->sent)
1105 {
1106 asyncs [i]->sent = 0;
1107 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1108 }
1109 }
1110#endif
332} 1111}
1112
1113/*****************************************************************************/
333 1114
334static void 1115static void
335sighandler (int signum) 1116ev_sighandler (int signum)
336{ 1117{
1118#if EV_MULTIPLICITY
1119 struct ev_loop *loop = &default_loop_struct;
1120#endif
1121
1122#if _WIN32
1123 signal (signum, ev_sighandler);
1124#endif
1125
337 signals [signum - 1].gotsig = 1; 1126 signals [signum - 1].gotsig = 1;
338 1127 evpipe_write (EV_A_ &gotsig);
339 if (!gotsig)
340 {
341 gotsig = 1;
342 write (sigpipe [1], &gotsig, 1);
343 }
344} 1128}
345 1129
346static void 1130void noinline
347sigcb (struct ev_io *iow, int revents) 1131ev_feed_signal_event (EV_P_ int signum)
348{ 1132{
349 struct ev_signal *w; 1133 WL w;
350 int sig;
351 1134
352 gotsig = 0; 1135#if EV_MULTIPLICITY
353 read (sigpipe [0], &revents, 1); 1136 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1137#endif
354 1138
355 for (sig = signalmax; sig--; ) 1139 --signum;
356 if (signals [sig].gotsig) 1140
357 { 1141 if (signum < 0 || signum >= signalmax)
1142 return;
1143
358 signals [sig].gotsig = 0; 1144 signals [signum].gotsig = 0;
359 1145
360 for (w = signals [sig].head; w; w = w->next) 1146 for (w = signals [signum].head; w; w = w->next)
361 event ((W)w, EV_SIGNAL); 1147 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
362 }
363}
364
365static void
366siginit (void)
367{
368 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371 /* rather than sort out wether we really need nb, set it */
372 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
374
375 ev_io_set (&sigev, sigpipe [0], EV_READ);
376 ev_io_start (&sigev);
377} 1148}
378 1149
379/*****************************************************************************/ 1150/*****************************************************************************/
380 1151
381static struct ev_idle **idles; 1152static WL childs [EV_PID_HASHSIZE];
382static int idlemax, idlecnt;
383 1153
384static struct ev_prepare **prepares; 1154#ifndef _WIN32
385static int preparemax, preparecnt;
386 1155
387static struct ev_check **checks;
388static int checkmax, checkcnt;
389
390/*****************************************************************************/
391
392static struct ev_child *childs [PID_HASHSIZE];
393static struct ev_signal childev; 1156static ev_signal childev;
1157
1158#ifndef WIFCONTINUED
1159# define WIFCONTINUED(status) 0
1160#endif
1161
1162void inline_speed
1163child_reap (EV_P_ int chain, int pid, int status)
1164{
1165 ev_child *w;
1166 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1167
1168 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1169 {
1170 if ((w->pid == pid || !w->pid)
1171 && (!traced || (w->flags & 1)))
1172 {
1173 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1174 w->rpid = pid;
1175 w->rstatus = status;
1176 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1177 }
1178 }
1179}
394 1180
395#ifndef WCONTINUED 1181#ifndef WCONTINUED
396# define WCONTINUED 0 1182# define WCONTINUED 0
397#endif 1183#endif
398 1184
399static void 1185static void
400childcb (struct ev_signal *sw, int revents) 1186childcb (EV_P_ ev_signal *sw, int revents)
401{ 1187{
402 struct ev_child *w;
403 int pid, status; 1188 int pid, status;
404 1189
1190 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
405 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1191 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1192 if (!WCONTINUED
407 if (w->pid == pid || w->pid == -1) 1193 || errno != EINVAL
408 { 1194 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
409 w->status = status; 1195 return;
410 event ((W)w, EV_CHILD); 1196
411 } 1197 /* make sure we are called again until all children have been reaped */
1198 /* we need to do it this way so that the callback gets called before we continue */
1199 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1200
1201 child_reap (EV_A_ pid, pid, status);
1202 if (EV_PID_HASHSIZE > 1)
1203 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
412} 1204}
1205
1206#endif
413 1207
414/*****************************************************************************/ 1208/*****************************************************************************/
415 1209
1210#if EV_USE_PORT
1211# include "ev_port.c"
1212#endif
1213#if EV_USE_KQUEUE
1214# include "ev_kqueue.c"
1215#endif
416#if HAVE_EPOLL 1216#if EV_USE_EPOLL
417# include "ev_epoll.c" 1217# include "ev_epoll.c"
418#endif 1218#endif
1219#if EV_USE_POLL
1220# include "ev_poll.c"
1221#endif
419#if HAVE_SELECT 1222#if EV_USE_SELECT
420# include "ev_select.c" 1223# include "ev_select.c"
421#endif 1224#endif
422 1225
423int 1226int
424ev_version_major (void) 1227ev_version_major (void)
… …
430ev_version_minor (void) 1233ev_version_minor (void)
431{ 1234{
432 return EV_VERSION_MINOR; 1235 return EV_VERSION_MINOR;
433} 1236}
434 1237
435int ev_init (int flags) 1238/* return true if we are running with elevated privileges and should ignore env variables */
1239int inline_size
1240enable_secure (void)
436{ 1241{
437 if (!ev_method) 1242#ifdef _WIN32
1243 return 0;
1244#else
1245 return getuid () != geteuid ()
1246 || getgid () != getegid ();
1247#endif
1248}
1249
1250unsigned int
1251ev_supported_backends (void)
1252{
1253 unsigned int flags = 0;
1254
1255 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1256 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1257 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1258 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1259 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1260
1261 return flags;
1262}
1263
1264unsigned int
1265ev_recommended_backends (void)
1266{
1267 unsigned int flags = ev_supported_backends ();
1268
1269#ifndef __NetBSD__
1270 /* kqueue is borked on everything but netbsd apparently */
1271 /* it usually doesn't work correctly on anything but sockets and pipes */
1272 flags &= ~EVBACKEND_KQUEUE;
1273#endif
1274#ifdef __APPLE__
1275 /* only select works correctly on that "unix-certified" platform */
1276 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1277 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1278#endif
1279
1280 return flags;
1281}
1282
1283unsigned int
1284ev_embeddable_backends (void)
1285{
1286 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1287
1288 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1289 /* please fix it and tell me how to detect the fix */
1290 flags &= ~EVBACKEND_EPOLL;
1291
1292 return flags;
1293}
1294
1295unsigned int
1296ev_backend (EV_P)
1297{
1298 return backend;
1299}
1300
1301unsigned int
1302ev_loop_count (EV_P)
1303{
1304 return loop_count;
1305}
1306
1307void
1308ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1309{
1310 io_blocktime = interval;
1311}
1312
1313void
1314ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1315{
1316 timeout_blocktime = interval;
1317}
1318
1319static void noinline
1320loop_init (EV_P_ unsigned int flags)
1321{
1322 if (!backend)
438 { 1323 {
439#if HAVE_MONOTONIC 1324#if EV_USE_MONOTONIC
440 { 1325 {
441 struct timespec ts; 1326 struct timespec ts;
442 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1327 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443 have_monotonic = 1; 1328 have_monotonic = 1;
444 } 1329 }
445#endif 1330#endif
446 1331
447 ev_now = ev_time (); 1332 ev_rt_now = ev_time ();
448 now = get_clock (); 1333 mn_now = get_clock ();
1334 now_floor = mn_now;
449 diff = ev_now - now; 1335 rtmn_diff = ev_rt_now - mn_now;
450 1336
451 if (pipe (sigpipe)) 1337 io_blocktime = 0.;
452 return 0; 1338 timeout_blocktime = 0.;
1339 backend = 0;
1340 backend_fd = -1;
1341 gotasync = 0;
1342#if EV_USE_INOTIFY
1343 fs_fd = -2;
1344#endif
453 1345
454 ev_method = EVMETHOD_NONE; 1346 /* pid check not overridable via env */
1347#ifndef _WIN32
1348 if (flags & EVFLAG_FORKCHECK)
1349 curpid = getpid ();
1350#endif
1351
1352 if (!(flags & EVFLAG_NOENV)
1353 && !enable_secure ()
1354 && getenv ("LIBEV_FLAGS"))
1355 flags = atoi (getenv ("LIBEV_FLAGS"));
1356
1357 if (!(flags & 0x0000ffffU))
1358 flags |= ev_recommended_backends ();
1359
1360#if EV_USE_PORT
1361 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1362#endif
1363#if EV_USE_KQUEUE
1364 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1365#endif
455#if HAVE_EPOLL 1366#if EV_USE_EPOLL
456 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1367 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
457#endif 1368#endif
1369#if EV_USE_POLL
1370 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1371#endif
458#if HAVE_SELECT 1372#if EV_USE_SELECT
459 if (ev_method == EVMETHOD_NONE) select_init (flags); 1373 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
460#endif 1374#endif
461 1375
462 if (ev_method) 1376 ev_init (&pipeev, pipecb);
1377 ev_set_priority (&pipeev, EV_MAXPRI);
1378 }
1379}
1380
1381static void noinline
1382loop_destroy (EV_P)
1383{
1384 int i;
1385
1386 if (ev_is_active (&pipeev))
1387 {
1388 ev_ref (EV_A); /* signal watcher */
1389 ev_io_stop (EV_A_ &pipeev);
1390
1391#if EV_USE_EVENTFD
1392 if (evfd >= 0)
1393 close (evfd);
1394#endif
1395
1396 if (evpipe [0] >= 0)
463 { 1397 {
464 ev_watcher_init (&sigev, sigcb); 1398 close (evpipe [0]);
465 siginit (); 1399 close (evpipe [1]);
1400 }
1401 }
466 1402
1403#if EV_USE_INOTIFY
1404 if (fs_fd >= 0)
1405 close (fs_fd);
1406#endif
1407
1408 if (backend_fd >= 0)
1409 close (backend_fd);
1410
1411#if EV_USE_PORT
1412 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1413#endif
1414#if EV_USE_KQUEUE
1415 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1416#endif
1417#if EV_USE_EPOLL
1418 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1419#endif
1420#if EV_USE_POLL
1421 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1422#endif
1423#if EV_USE_SELECT
1424 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1425#endif
1426
1427 for (i = NUMPRI; i--; )
1428 {
1429 array_free (pending, [i]);
1430#if EV_IDLE_ENABLE
1431 array_free (idle, [i]);
1432#endif
1433 }
1434
1435 ev_free (anfds); anfdmax = 0;
1436
1437 /* have to use the microsoft-never-gets-it-right macro */
1438 array_free (fdchange, EMPTY);
1439 array_free (timer, EMPTY);
1440#if EV_PERIODIC_ENABLE
1441 array_free (periodic, EMPTY);
1442#endif
1443#if EV_FORK_ENABLE
1444 array_free (fork, EMPTY);
1445#endif
1446 array_free (prepare, EMPTY);
1447 array_free (check, EMPTY);
1448#if EV_ASYNC_ENABLE
1449 array_free (async, EMPTY);
1450#endif
1451
1452 backend = 0;
1453}
1454
1455#if EV_USE_INOTIFY
1456void inline_size infy_fork (EV_P);
1457#endif
1458
1459void inline_size
1460loop_fork (EV_P)
1461{
1462#if EV_USE_PORT
1463 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1464#endif
1465#if EV_USE_KQUEUE
1466 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1467#endif
1468#if EV_USE_EPOLL
1469 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1470#endif
1471#if EV_USE_INOTIFY
1472 infy_fork (EV_A);
1473#endif
1474
1475 if (ev_is_active (&pipeev))
1476 {
1477 /* this "locks" the handlers against writing to the pipe */
1478 /* while we modify the fd vars */
1479 gotsig = 1;
1480#if EV_ASYNC_ENABLE
1481 gotasync = 1;
1482#endif
1483
1484 ev_ref (EV_A);
1485 ev_io_stop (EV_A_ &pipeev);
1486
1487#if EV_USE_EVENTFD
1488 if (evfd >= 0)
1489 close (evfd);
1490#endif
1491
1492 if (evpipe [0] >= 0)
1493 {
1494 close (evpipe [0]);
1495 close (evpipe [1]);
1496 }
1497
1498 evpipe_init (EV_A);
1499 /* now iterate over everything, in case we missed something */
1500 pipecb (EV_A_ &pipeev, EV_READ);
1501 }
1502
1503 postfork = 0;
1504}
1505
1506#if EV_MULTIPLICITY
1507
1508struct ev_loop *
1509ev_loop_new (unsigned int flags)
1510{
1511 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1512
1513 memset (loop, 0, sizeof (struct ev_loop));
1514
1515 loop_init (EV_A_ flags);
1516
1517 if (ev_backend (EV_A))
1518 return loop;
1519
1520 return 0;
1521}
1522
1523void
1524ev_loop_destroy (EV_P)
1525{
1526 loop_destroy (EV_A);
1527 ev_free (loop);
1528}
1529
1530void
1531ev_loop_fork (EV_P)
1532{
1533 postfork = 1; /* must be in line with ev_default_fork */
1534}
1535
1536#if EV_VERIFY
1537static void noinline
1538verify_watcher (EV_P_ W w)
1539{
1540 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1541
1542 if (w->pending)
1543 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1544}
1545
1546static void noinline
1547verify_heap (EV_P_ ANHE *heap, int N)
1548{
1549 int i;
1550
1551 for (i = HEAP0; i < N + HEAP0; ++i)
1552 {
1553 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1554 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1555 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1556
1557 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1558 }
1559}
1560
1561static void noinline
1562array_verify (EV_P_ W *ws, int cnt)
1563{
1564 while (cnt--)
1565 {
1566 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1567 verify_watcher (EV_A_ ws [cnt]);
1568 }
1569}
1570#endif
1571
1572void
1573ev_loop_verify (EV_P)
1574{
1575#if EV_VERIFY
1576 int i;
1577 WL w;
1578
1579 assert (activecnt >= -1);
1580
1581 assert (fdchangemax >= fdchangecnt);
1582 for (i = 0; i < fdchangecnt; ++i)
1583 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1584
1585 assert (anfdmax >= 0);
1586 for (i = 0; i < anfdmax; ++i)
1587 for (w = anfds [i].head; w; w = w->next)
1588 {
1589 verify_watcher (EV_A_ (W)w);
1590 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1591 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1592 }
1593
1594 assert (timermax >= timercnt);
1595 verify_heap (EV_A_ timers, timercnt);
1596
1597#if EV_PERIODIC_ENABLE
1598 assert (periodicmax >= periodiccnt);
1599 verify_heap (EV_A_ periodics, periodiccnt);
1600#endif
1601
1602 for (i = NUMPRI; i--; )
1603 {
1604 assert (pendingmax [i] >= pendingcnt [i]);
1605#if EV_IDLE_ENABLE
1606 assert (idleall >= 0);
1607 assert (idlemax [i] >= idlecnt [i]);
1608 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1609#endif
1610 }
1611
1612#if EV_FORK_ENABLE
1613 assert (forkmax >= forkcnt);
1614 array_verify (EV_A_ (W *)forks, forkcnt);
1615#endif
1616
1617#if EV_ASYNC_ENABLE
1618 assert (asyncmax >= asynccnt);
1619 array_verify (EV_A_ (W *)asyncs, asynccnt);
1620#endif
1621
1622 assert (preparemax >= preparecnt);
1623 array_verify (EV_A_ (W *)prepares, preparecnt);
1624
1625 assert (checkmax >= checkcnt);
1626 array_verify (EV_A_ (W *)checks, checkcnt);
1627
1628# if 0
1629 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1630 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1631# endif
1632#endif
1633}
1634
1635#endif /* multiplicity */
1636
1637#if EV_MULTIPLICITY
1638struct ev_loop *
1639ev_default_loop_init (unsigned int flags)
1640#else
1641int
1642ev_default_loop (unsigned int flags)
1643#endif
1644{
1645 if (!ev_default_loop_ptr)
1646 {
1647#if EV_MULTIPLICITY
1648 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1649#else
1650 ev_default_loop_ptr = 1;
1651#endif
1652
1653 loop_init (EV_A_ flags);
1654
1655 if (ev_backend (EV_A))
1656 {
1657#ifndef _WIN32
467 ev_signal_init (&childev, childcb, SIGCHLD); 1658 ev_signal_init (&childev, childcb, SIGCHLD);
1659 ev_set_priority (&childev, EV_MAXPRI);
468 ev_signal_start (&childev); 1660 ev_signal_start (EV_A_ &childev);
1661 ev_unref (EV_A); /* child watcher should not keep loop alive */
1662#endif
469 } 1663 }
1664 else
1665 ev_default_loop_ptr = 0;
470 } 1666 }
471 1667
472 return ev_method; 1668 return ev_default_loop_ptr;
1669}
1670
1671void
1672ev_default_destroy (void)
1673{
1674#if EV_MULTIPLICITY
1675 struct ev_loop *loop = ev_default_loop_ptr;
1676#endif
1677
1678 ev_default_loop_ptr = 0;
1679
1680#ifndef _WIN32
1681 ev_ref (EV_A); /* child watcher */
1682 ev_signal_stop (EV_A_ &childev);
1683#endif
1684
1685 loop_destroy (EV_A);
1686}
1687
1688void
1689ev_default_fork (void)
1690{
1691#if EV_MULTIPLICITY
1692 struct ev_loop *loop = ev_default_loop_ptr;
1693#endif
1694
1695 postfork = 1; /* must be in line with ev_loop_fork */
473} 1696}
474 1697
475/*****************************************************************************/ 1698/*****************************************************************************/
476 1699
477void 1700void
478ev_prefork (void) 1701ev_invoke (EV_P_ void *w, int revents)
479{ 1702{
480 /* nop */ 1703 EV_CB_INVOKE ((W)w, revents);
481} 1704}
482 1705
483void 1706void inline_speed
484ev_postfork_parent (void)
485{
486 /* nop */
487}
488
489void
490ev_postfork_child (void)
491{
492#if HAVE_EPOLL
493 if (ev_method == EVMETHOD_EPOLL)
494 epoll_postfork_child ();
495#endif
496
497 ev_io_stop (&sigev);
498 close (sigpipe [0]);
499 close (sigpipe [1]);
500 pipe (sigpipe);
501 siginit ();
502}
503
504/*****************************************************************************/
505
506static void
507call_pending (void) 1707call_pending (EV_P)
508{ 1708{
1709 int pri;
1710
1711 for (pri = NUMPRI; pri--; )
509 while (pendingcnt) 1712 while (pendingcnt [pri])
510 { 1713 {
511 ANPENDING *p = pendings + --pendingcnt; 1714 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512 1715
513 if (p->w) 1716 if (expect_true (p->w))
1717 {
1718 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1719
1720 p->w->pending = 0;
1721 EV_CB_INVOKE (p->w, p->events);
1722 EV_FREQUENT_CHECK;
1723 }
1724 }
1725}
1726
1727#if EV_IDLE_ENABLE
1728void inline_size
1729idle_reify (EV_P)
1730{
1731 if (expect_false (idleall))
1732 {
1733 int pri;
1734
1735 for (pri = NUMPRI; pri--; )
514 { 1736 {
515 p->w->pending = 0; 1737 if (pendingcnt [pri])
516 p->w->cb (p->w, p->events); 1738 break;
1739
1740 if (idlecnt [pri])
1741 {
1742 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1743 break;
1744 }
517 } 1745 }
518 } 1746 }
519} 1747}
1748#endif
520 1749
521static void 1750void inline_size
522timers_reify (void) 1751timers_reify (EV_P)
523{ 1752{
1753 EV_FREQUENT_CHECK;
1754
524 while (timercnt && timers [0]->at <= now) 1755 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
525 { 1756 {
526 struct ev_timer *w = timers [0]; 1757 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
527 1758
528 event ((W)w, EV_TIMEOUT); 1759 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
529 1760
530 /* first reschedule or stop timer */ 1761 /* first reschedule or stop timer */
531 if (w->repeat) 1762 if (w->repeat)
532 { 1763 {
533 w->at = now + w->repeat; 1764 ev_at (w) += w->repeat;
534 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1765 if (ev_at (w) < mn_now)
1766 ev_at (w) = mn_now;
1767
1768 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1769
1770 ANHE_at_cache (timers [HEAP0]);
535 downheap ((WT *)timers, timercnt, 0); 1771 downheap (timers, timercnt, HEAP0);
536 } 1772 }
537 else 1773 else
538 ev_timer_stop (w); /* nonrepeating: stop timer */ 1774 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539 }
540}
541 1775
542static void 1776 EV_FREQUENT_CHECK;
1777 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1778 }
1779}
1780
1781#if EV_PERIODIC_ENABLE
1782void inline_size
543periodics_reify (void) 1783periodics_reify (EV_P)
544{ 1784{
1785 EV_FREQUENT_CHECK;
1786
545 while (periodiccnt && periodics [0]->at <= ev_now) 1787 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
546 { 1788 {
547 struct ev_periodic *w = periodics [0]; 1789 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1790
1791 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
548 1792
549 /* first reschedule or stop timer */ 1793 /* first reschedule or stop timer */
550 if (w->interval) 1794 if (w->reschedule_cb)
551 { 1795 {
552 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1796 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
553 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1797
1798 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1799
1800 ANHE_at_cache (periodics [HEAP0]);
554 downheap ((WT *)periodics, periodiccnt, 0); 1801 downheap (periodics, periodiccnt, HEAP0);
1802 }
1803 else if (w->interval)
1804 {
1805 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1806 /* if next trigger time is not sufficiently in the future, put it there */
1807 /* this might happen because of floating point inexactness */
1808 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1809 {
1810 ev_at (w) += w->interval;
1811
1812 /* if interval is unreasonably low we might still have a time in the past */
1813 /* so correct this. this will make the periodic very inexact, but the user */
1814 /* has effectively asked to get triggered more often than possible */
1815 if (ev_at (w) < ev_rt_now)
1816 ev_at (w) = ev_rt_now;
1817 }
1818
1819 ANHE_at_cache (periodics [HEAP0]);
1820 downheap (periodics, periodiccnt, HEAP0);
555 } 1821 }
556 else 1822 else
557 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1823 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558 1824
559 event ((W)w, EV_TIMEOUT); 1825 EV_FREQUENT_CHECK;
1826 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
560 } 1827 }
561} 1828}
562 1829
563static void 1830static void noinline
564periodics_reschedule (ev_tstamp diff) 1831periodics_reschedule (EV_P)
565{ 1832{
566 int i; 1833 int i;
567 1834
568 /* adjust periodics after time jump */ 1835 /* adjust periodics after time jump */
569 for (i = 0; i < periodiccnt; ++i) 1836 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
570 { 1837 {
571 struct ev_periodic *w = periodics [i]; 1838 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
572 1839
1840 if (w->reschedule_cb)
1841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
573 if (w->interval) 1842 else if (w->interval)
1843 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1844
1845 ANHE_at_cache (periodics [i]);
1846 }
1847
1848 reheap (periodics, periodiccnt);
1849}
1850#endif
1851
1852void inline_speed
1853time_update (EV_P_ ev_tstamp max_block)
1854{
1855 int i;
1856
1857#if EV_USE_MONOTONIC
1858 if (expect_true (have_monotonic))
1859 {
1860 ev_tstamp odiff = rtmn_diff;
1861
1862 mn_now = get_clock ();
1863
1864 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1865 /* interpolate in the meantime */
1866 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
574 { 1867 {
575 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1868 ev_rt_now = rtmn_diff + mn_now;
1869 return;
1870 }
576 1871
577 if (fabs (diff) >= 1e-4) 1872 now_floor = mn_now;
1873 ev_rt_now = ev_time ();
1874
1875 /* loop a few times, before making important decisions.
1876 * on the choice of "4": one iteration isn't enough,
1877 * in case we get preempted during the calls to
1878 * ev_time and get_clock. a second call is almost guaranteed
1879 * to succeed in that case, though. and looping a few more times
1880 * doesn't hurt either as we only do this on time-jumps or
1881 * in the unlikely event of having been preempted here.
1882 */
1883 for (i = 4; --i; )
1884 {
1885 rtmn_diff = ev_rt_now - mn_now;
1886
1887 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1888 return; /* all is well */
1889
1890 ev_rt_now = ev_time ();
1891 mn_now = get_clock ();
1892 now_floor = mn_now;
1893 }
1894
1895# if EV_PERIODIC_ENABLE
1896 periodics_reschedule (EV_A);
1897# endif
1898 /* no timer adjustment, as the monotonic clock doesn't jump */
1899 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1900 }
1901 else
1902#endif
1903 {
1904 ev_rt_now = ev_time ();
1905
1906 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1907 {
1908#if EV_PERIODIC_ENABLE
1909 periodics_reschedule (EV_A);
1910#endif
1911 /* adjust timers. this is easy, as the offset is the same for all of them */
1912 for (i = 0; i < timercnt; ++i)
578 { 1913 {
579 ev_periodic_stop (w); 1914 ANHE *he = timers + i + HEAP0;
580 ev_periodic_start (w); 1915 ANHE_w (*he)->at += ev_rt_now - mn_now;
581 1916 ANHE_at_cache (*he);
582 i = 0; /* restart loop, inefficient, but time jumps should be rare */
583 } 1917 }
584 } 1918 }
585 }
586}
587 1919
588static void 1920 mn_now = ev_rt_now;
589time_update (void)
590{
591 int i;
592
593 ev_now = ev_time ();
594
595 if (have_monotonic)
596 { 1921 }
597 ev_tstamp odiff = diff; 1922}
598 1923
599 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1924void
1925ev_ref (EV_P)
1926{
1927 ++activecnt;
1928}
1929
1930void
1931ev_unref (EV_P)
1932{
1933 --activecnt;
1934}
1935
1936void
1937ev_now_update (EV_P)
1938{
1939 time_update (EV_A_ 1e100);
1940}
1941
1942static int loop_done;
1943
1944void
1945ev_loop (EV_P_ int flags)
1946{
1947 loop_done = EVUNLOOP_CANCEL;
1948
1949 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1950
1951 do
1952 {
1953#if EV_VERIFY >= 2
1954 ev_loop_verify (EV_A);
1955#endif
1956
1957#ifndef _WIN32
1958 if (expect_false (curpid)) /* penalise the forking check even more */
1959 if (expect_false (getpid () != curpid))
1960 {
1961 curpid = getpid ();
1962 postfork = 1;
1963 }
1964#endif
1965
1966#if EV_FORK_ENABLE
1967 /* we might have forked, so queue fork handlers */
1968 if (expect_false (postfork))
1969 if (forkcnt)
1970 {
1971 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1972 call_pending (EV_A);
1973 }
1974#endif
1975
1976 /* queue prepare watchers (and execute them) */
1977 if (expect_false (preparecnt))
600 { 1978 {
601 now = get_clock (); 1979 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
602 diff = ev_now - now; 1980 call_pending (EV_A);
603
604 if (fabs (odiff - diff) < MIN_TIMEJUMP)
605 return; /* all is well */
606
607 ev_now = ev_time ();
608 } 1981 }
609 1982
610 periodics_reschedule (diff - odiff); 1983 if (expect_false (!activecnt))
611 /* no timer adjustment, as the monotonic clock doesn't jump */ 1984 break;
612 }
613 else
614 {
615 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
616 {
617 periodics_reschedule (ev_now - now);
618 1985
619 /* adjust timers. this is easy, as the offset is the same for all */ 1986 /* we might have forked, so reify kernel state if necessary */
620 for (i = 0; i < timercnt; ++i) 1987 if (expect_false (postfork))
621 timers [i]->at += diff; 1988 loop_fork (EV_A);
622 }
623
624 now = ev_now;
625 }
626}
627
628int ev_loop_done;
629
630void ev_loop (int flags)
631{
632 double block;
633 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634
635 do
636 {
637 /* queue check watchers (and execute them) */
638 if (preparecnt)
639 {
640 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
641 call_pending ();
642 }
643 1989
644 /* update fd-related kernel structures */ 1990 /* update fd-related kernel structures */
645 fd_reify (); 1991 fd_reify (EV_A);
646 1992
647 /* calculate blocking time */ 1993 /* calculate blocking time */
1994 {
1995 ev_tstamp waittime = 0.;
1996 ev_tstamp sleeptime = 0.;
648 1997
649 /* we only need this for !monotonic clockor timers, but as we basically 1998 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
650 always have timers, we just calculate it always */
651 ev_now = ev_time ();
652
653 if (flags & EVLOOP_NONBLOCK || idlecnt)
654 block = 0.;
655 else
656 { 1999 {
2000 /* update time to cancel out callback processing overhead */
2001 time_update (EV_A_ 1e100);
2002
657 block = MAX_BLOCKTIME; 2003 waittime = MAX_BLOCKTIME;
658 2004
659 if (timercnt) 2005 if (timercnt)
660 { 2006 {
661 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2007 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
662 if (block > to) block = to; 2008 if (waittime > to) waittime = to;
663 } 2009 }
664 2010
2011#if EV_PERIODIC_ENABLE
665 if (periodiccnt) 2012 if (periodiccnt)
666 { 2013 {
667 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2014 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
668 if (block > to) block = to; 2015 if (waittime > to) waittime = to;
669 } 2016 }
2017#endif
670 2018
671 if (block < 0.) block = 0.; 2019 if (expect_false (waittime < timeout_blocktime))
2020 waittime = timeout_blocktime;
2021
2022 sleeptime = waittime - backend_fudge;
2023
2024 if (expect_true (sleeptime > io_blocktime))
2025 sleeptime = io_blocktime;
2026
2027 if (sleeptime)
2028 {
2029 ev_sleep (sleeptime);
2030 waittime -= sleeptime;
2031 }
672 } 2032 }
673 2033
674 method_poll (block); 2034 ++loop_count;
2035 backend_poll (EV_A_ waittime);
675 2036
676 /* update ev_now, do magic */ 2037 /* update ev_rt_now, do magic */
677 time_update (); 2038 time_update (EV_A_ waittime + sleeptime);
2039 }
678 2040
679 /* queue pending timers and reschedule them */ 2041 /* queue pending timers and reschedule them */
680 timers_reify (); /* relative timers called last */ 2042 timers_reify (EV_A); /* relative timers called last */
2043#if EV_PERIODIC_ENABLE
681 periodics_reify (); /* absolute timers called first */ 2044 periodics_reify (EV_A); /* absolute timers called first */
2045#endif
682 2046
2047#if EV_IDLE_ENABLE
683 /* queue idle watchers unless io or timers are pending */ 2048 /* queue idle watchers unless other events are pending */
684 if (!pendingcnt) 2049 idle_reify (EV_A);
685 queue_events ((W *)idles, idlecnt, EV_IDLE); 2050#endif
686 2051
687 /* queue check watchers, to be executed first */ 2052 /* queue check watchers, to be executed first */
688 if (checkcnt) 2053 if (expect_false (checkcnt))
689 queue_events ((W *)checks, checkcnt, EV_CHECK); 2054 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690 2055
691 call_pending (); 2056 call_pending (EV_A);
692 } 2057 }
693 while (!ev_loop_done); 2058 while (expect_true (
2059 activecnt
2060 && !loop_done
2061 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2062 ));
694 2063
695 if (ev_loop_done != 2) 2064 if (loop_done == EVUNLOOP_ONE)
2065 loop_done = EVUNLOOP_CANCEL;
2066}
2067
2068void
2069ev_unloop (EV_P_ int how)
2070{
696 ev_loop_done = 0; 2071 loop_done = how;
697} 2072}
698 2073
699/*****************************************************************************/ 2074/*****************************************************************************/
700 2075
701static void 2076void inline_size
702wlist_add (WL *head, WL elem) 2077wlist_add (WL *head, WL elem)
703{ 2078{
704 elem->next = *head; 2079 elem->next = *head;
705 *head = elem; 2080 *head = elem;
706} 2081}
707 2082
708static void 2083void inline_size
709wlist_del (WL *head, WL elem) 2084wlist_del (WL *head, WL elem)
710{ 2085{
711 while (*head) 2086 while (*head)
712 { 2087 {
713 if (*head == elem) 2088 if (*head == elem)
… …
718 2093
719 head = &(*head)->next; 2094 head = &(*head)->next;
720 } 2095 }
721} 2096}
722 2097
723static void 2098void inline_speed
724ev_clear (W w) 2099clear_pending (EV_P_ W w)
725{ 2100{
726 if (w->pending) 2101 if (w->pending)
727 { 2102 {
728 pendings [w->pending - 1].w = 0; 2103 pendings [ABSPRI (w)][w->pending - 1].w = 0;
729 w->pending = 0; 2104 w->pending = 0;
730 } 2105 }
731} 2106}
732 2107
733static void 2108int
2109ev_clear_pending (EV_P_ void *w)
2110{
2111 W w_ = (W)w;
2112 int pending = w_->pending;
2113
2114 if (expect_true (pending))
2115 {
2116 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2117 w_->pending = 0;
2118 p->w = 0;
2119 return p->events;
2120 }
2121 else
2122 return 0;
2123}
2124
2125void inline_size
2126pri_adjust (EV_P_ W w)
2127{
2128 int pri = w->priority;
2129 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2130 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2131 w->priority = pri;
2132}
2133
2134void inline_speed
734ev_start (W w, int active) 2135ev_start (EV_P_ W w, int active)
735{ 2136{
2137 pri_adjust (EV_A_ w);
736 w->active = active; 2138 w->active = active;
2139 ev_ref (EV_A);
737} 2140}
738 2141
739static void 2142void inline_size
740ev_stop (W w) 2143ev_stop (EV_P_ W w)
741{ 2144{
2145 ev_unref (EV_A);
742 w->active = 0; 2146 w->active = 0;
743} 2147}
744 2148
745/*****************************************************************************/ 2149/*****************************************************************************/
746 2150
747void 2151void noinline
748ev_io_start (struct ev_io *w) 2152ev_io_start (EV_P_ ev_io *w)
749{ 2153{
2154 int fd = w->fd;
2155
750 if (ev_is_active (w)) 2156 if (expect_false (ev_is_active (w)))
751 return; 2157 return;
752 2158
753 int fd = w->fd; 2159 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2160 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
754 2161
2162 EV_FREQUENT_CHECK;
2163
755 ev_start ((W)w, 1); 2164 ev_start (EV_A_ (W)w, 1);
756 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2165 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
757 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2166 wlist_add (&anfds[fd].head, (WL)w);
758 2167
759 fd_change (fd); 2168 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
760} 2169 w->events &= ~EV_IOFDSET;
761 2170
762void 2171 EV_FREQUENT_CHECK;
2172}
2173
2174void noinline
763ev_io_stop (struct ev_io *w) 2175ev_io_stop (EV_P_ ev_io *w)
764{ 2176{
765 ev_clear ((W)w); 2177 clear_pending (EV_A_ (W)w);
766 if (!ev_is_active (w)) 2178 if (expect_false (!ev_is_active (w)))
767 return; 2179 return;
768 2180
2181 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2182
2183 EV_FREQUENT_CHECK;
2184
769 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2185 wlist_del (&anfds[w->fd].head, (WL)w);
770 ev_stop ((W)w); 2186 ev_stop (EV_A_ (W)w);
771 2187
772 fd_change (w->fd); 2188 fd_change (EV_A_ w->fd, 1);
773}
774 2189
775void 2190 EV_FREQUENT_CHECK;
2191}
2192
2193void noinline
776ev_timer_start (struct ev_timer *w) 2194ev_timer_start (EV_P_ ev_timer *w)
777{ 2195{
778 if (ev_is_active (w)) 2196 if (expect_false (ev_is_active (w)))
779 return; 2197 return;
780 2198
781 w->at += now; 2199 ev_at (w) += mn_now;
782 2200
783 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2201 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784 2202
785 ev_start ((W)w, ++timercnt); 2203 EV_FREQUENT_CHECK;
786 array_needsize (timers, timermax, timercnt, );
787 timers [timercnt - 1] = w;
788 upheap ((WT *)timers, timercnt - 1);
789}
790 2204
791void 2205 ++timercnt;
2206 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2207 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2208 ANHE_w (timers [ev_active (w)]) = (WT)w;
2209 ANHE_at_cache (timers [ev_active (w)]);
2210 upheap (timers, ev_active (w));
2211
2212 EV_FREQUENT_CHECK;
2213
2214 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2215}
2216
2217void noinline
792ev_timer_stop (struct ev_timer *w) 2218ev_timer_stop (EV_P_ ev_timer *w)
793{ 2219{
794 ev_clear ((W)w); 2220 clear_pending (EV_A_ (W)w);
795 if (!ev_is_active (w)) 2221 if (expect_false (!ev_is_active (w)))
796 return; 2222 return;
797 2223
798 if (w->active < timercnt--) 2224 EV_FREQUENT_CHECK;
2225
2226 {
2227 int active = ev_active (w);
2228
2229 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2230
2231 --timercnt;
2232
2233 if (expect_true (active < timercnt + HEAP0))
799 { 2234 {
800 timers [w->active - 1] = timers [timercnt]; 2235 timers [active] = timers [timercnt + HEAP0];
801 downheap ((WT *)timers, timercnt, w->active - 1); 2236 adjustheap (timers, timercnt, active);
802 } 2237 }
2238 }
803 2239
804 w->at = w->repeat; 2240 EV_FREQUENT_CHECK;
805 2241
2242 ev_at (w) -= mn_now;
2243
806 ev_stop ((W)w); 2244 ev_stop (EV_A_ (W)w);
807} 2245}
808 2246
809void 2247void noinline
810ev_timer_again (struct ev_timer *w) 2248ev_timer_again (EV_P_ ev_timer *w)
811{ 2249{
2250 EV_FREQUENT_CHECK;
2251
812 if (ev_is_active (w)) 2252 if (ev_is_active (w))
813 { 2253 {
814 if (w->repeat) 2254 if (w->repeat)
815 { 2255 {
816 w->at = now + w->repeat; 2256 ev_at (w) = mn_now + w->repeat;
2257 ANHE_at_cache (timers [ev_active (w)]);
817 downheap ((WT *)timers, timercnt, w->active - 1); 2258 adjustheap (timers, timercnt, ev_active (w));
818 } 2259 }
819 else 2260 else
820 ev_timer_stop (w); 2261 ev_timer_stop (EV_A_ w);
821 } 2262 }
822 else if (w->repeat) 2263 else if (w->repeat)
2264 {
2265 ev_at (w) = w->repeat;
823 ev_timer_start (w); 2266 ev_timer_start (EV_A_ w);
824} 2267 }
825 2268
826void 2269 EV_FREQUENT_CHECK;
2270}
2271
2272#if EV_PERIODIC_ENABLE
2273void noinline
827ev_periodic_start (struct ev_periodic *w) 2274ev_periodic_start (EV_P_ ev_periodic *w)
828{ 2275{
829 if (ev_is_active (w)) 2276 if (expect_false (ev_is_active (w)))
830 return; 2277 return;
831 2278
832 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2279 if (w->reschedule_cb)
833 2280 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2281 else if (w->interval)
2282 {
2283 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
834 /* this formula differs from the one in periodic_reify because we do not always round up */ 2284 /* this formula differs from the one in periodic_reify because we do not always round up */
835 if (w->interval)
836 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2285 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2286 }
2287 else
2288 ev_at (w) = w->offset;
837 2289
2290 EV_FREQUENT_CHECK;
2291
2292 ++periodiccnt;
838 ev_start ((W)w, ++periodiccnt); 2293 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
839 array_needsize (periodics, periodicmax, periodiccnt, ); 2294 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
840 periodics [periodiccnt - 1] = w; 2295 ANHE_w (periodics [ev_active (w)]) = (WT)w;
841 upheap ((WT *)periodics, periodiccnt - 1); 2296 ANHE_at_cache (periodics [ev_active (w)]);
842} 2297 upheap (periodics, ev_active (w));
843 2298
844void 2299 EV_FREQUENT_CHECK;
2300
2301 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2302}
2303
2304void noinline
845ev_periodic_stop (struct ev_periodic *w) 2305ev_periodic_stop (EV_P_ ev_periodic *w)
846{ 2306{
847 ev_clear ((W)w); 2307 clear_pending (EV_A_ (W)w);
848 if (!ev_is_active (w)) 2308 if (expect_false (!ev_is_active (w)))
849 return; 2309 return;
850 2310
851 if (w->active < periodiccnt--) 2311 EV_FREQUENT_CHECK;
2312
2313 {
2314 int active = ev_active (w);
2315
2316 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2317
2318 --periodiccnt;
2319
2320 if (expect_true (active < periodiccnt + HEAP0))
852 { 2321 {
853 periodics [w->active - 1] = periodics [periodiccnt]; 2322 periodics [active] = periodics [periodiccnt + HEAP0];
854 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2323 adjustheap (periodics, periodiccnt, active);
855 } 2324 }
2325 }
856 2326
2327 EV_FREQUENT_CHECK;
2328
857 ev_stop ((W)w); 2329 ev_stop (EV_A_ (W)w);
858} 2330}
859 2331
860void 2332void noinline
2333ev_periodic_again (EV_P_ ev_periodic *w)
2334{
2335 /* TODO: use adjustheap and recalculation */
2336 ev_periodic_stop (EV_A_ w);
2337 ev_periodic_start (EV_A_ w);
2338}
2339#endif
2340
2341#ifndef SA_RESTART
2342# define SA_RESTART 0
2343#endif
2344
2345void noinline
861ev_signal_start (struct ev_signal *w) 2346ev_signal_start (EV_P_ ev_signal *w)
862{ 2347{
2348#if EV_MULTIPLICITY
2349 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2350#endif
863 if (ev_is_active (w)) 2351 if (expect_false (ev_is_active (w)))
864 return; 2352 return;
865 2353
2354 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2355
2356 evpipe_init (EV_A);
2357
2358 EV_FREQUENT_CHECK;
2359
2360 {
2361#ifndef _WIN32
2362 sigset_t full, prev;
2363 sigfillset (&full);
2364 sigprocmask (SIG_SETMASK, &full, &prev);
2365#endif
2366
2367 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2368
2369#ifndef _WIN32
2370 sigprocmask (SIG_SETMASK, &prev, 0);
2371#endif
2372 }
2373
866 ev_start ((W)w, 1); 2374 ev_start (EV_A_ (W)w, 1);
867 array_needsize (signals, signalmax, w->signum, signals_init);
868 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2375 wlist_add (&signals [w->signum - 1].head, (WL)w);
869 2376
870 if (!w->next) 2377 if (!((WL)w)->next)
871 { 2378 {
2379#if _WIN32
2380 signal (w->signum, ev_sighandler);
2381#else
872 struct sigaction sa; 2382 struct sigaction sa;
873 sa.sa_handler = sighandler; 2383 sa.sa_handler = ev_sighandler;
874 sigfillset (&sa.sa_mask); 2384 sigfillset (&sa.sa_mask);
875 sa.sa_flags = 0; 2385 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876 sigaction (w->signum, &sa, 0); 2386 sigaction (w->signum, &sa, 0);
2387#endif
877 } 2388 }
878}
879 2389
880void 2390 EV_FREQUENT_CHECK;
2391}
2392
2393void noinline
881ev_signal_stop (struct ev_signal *w) 2394ev_signal_stop (EV_P_ ev_signal *w)
882{ 2395{
883 ev_clear ((W)w); 2396 clear_pending (EV_A_ (W)w);
884 if (!ev_is_active (w)) 2397 if (expect_false (!ev_is_active (w)))
885 return; 2398 return;
886 2399
2400 EV_FREQUENT_CHECK;
2401
887 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2402 wlist_del (&signals [w->signum - 1].head, (WL)w);
888 ev_stop ((W)w); 2403 ev_stop (EV_A_ (W)w);
889 2404
890 if (!signals [w->signum - 1].head) 2405 if (!signals [w->signum - 1].head)
891 signal (w->signum, SIG_DFL); 2406 signal (w->signum, SIG_DFL);
892}
893 2407
2408 EV_FREQUENT_CHECK;
2409}
2410
894void 2411void
895ev_idle_start (struct ev_idle *w) 2412ev_child_start (EV_P_ ev_child *w)
896{ 2413{
2414#if EV_MULTIPLICITY
2415 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2416#endif
897 if (ev_is_active (w)) 2417 if (expect_false (ev_is_active (w)))
898 return; 2418 return;
899 2419
900 ev_start ((W)w, ++idlecnt); 2420 EV_FREQUENT_CHECK;
901 array_needsize (idles, idlemax, idlecnt, );
902 idles [idlecnt - 1] = w;
903}
904 2421
2422 ev_start (EV_A_ (W)w, 1);
2423 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2424
2425 EV_FREQUENT_CHECK;
2426}
2427
905void 2428void
906ev_idle_stop (struct ev_idle *w) 2429ev_child_stop (EV_P_ ev_child *w)
907{ 2430{
908 ev_clear ((W)w); 2431 clear_pending (EV_A_ (W)w);
909 if (ev_is_active (w)) 2432 if (expect_false (!ev_is_active (w)))
910 return; 2433 return;
911 2434
912 idles [w->active - 1] = idles [--idlecnt]; 2435 EV_FREQUENT_CHECK;
2436
2437 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
913 ev_stop ((W)w); 2438 ev_stop (EV_A_ (W)w);
914}
915 2439
916void 2440 EV_FREQUENT_CHECK;
917ev_prepare_start (struct ev_prepare *w) 2441}
2442
2443#if EV_STAT_ENABLE
2444
2445# ifdef _WIN32
2446# undef lstat
2447# define lstat(a,b) _stati64 (a,b)
2448# endif
2449
2450#define DEF_STAT_INTERVAL 5.0074891
2451#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2452#define MIN_STAT_INTERVAL 0.1074891
2453
2454static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2455
2456#if EV_USE_INOTIFY
2457# define EV_INOTIFY_BUFSIZE 8192
2458
2459static void noinline
2460infy_add (EV_P_ ev_stat *w)
918{ 2461{
919 if (ev_is_active (w)) 2462 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);
2463
2464 if (w->wd < 0)
2465 {
2466 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2467 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2468
2469 /* monitor some parent directory for speedup hints */
2470 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2471 /* but an efficiency issue only */
2472 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2473 {
2474 char path [4096];
2475 strcpy (path, w->path);
2476
2477 do
2478 {
2479 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2480 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2481
2482 char *pend = strrchr (path, '/');
2483
2484 if (!pend || pend == path)
2485 break;
2486
2487 *pend = 0;
2488 w->wd = inotify_add_watch (fs_fd, path, mask);
2489 }
2490 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2491 }
2492 }
2493
2494 if (w->wd >= 0)
2495 {
2496 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2497
2498 /* now local changes will be tracked by inotify, but remote changes won't */
2499 /* unless the filesystem it known to be local, we therefore still poll */
2500 /* also do poll on <2.6.25, but with normal frequency */
2501 struct statfs sfs;
2502
2503 if (fs_2625 && !statfs (w->path, &sfs))
2504 if (sfs.f_type == 0x1373 /* devfs */
2505 || sfs.f_type == 0xEF53 /* ext2/3 */
2506 || sfs.f_type == 0x3153464a /* jfs */
2507 || sfs.f_type == 0x52654973 /* reiser3 */
2508 || sfs.f_type == 0x01021994 /* tempfs */
2509 || sfs.f_type == 0x58465342 /* xfs */)
2510 return;
2511
2512 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2513 ev_timer_again (EV_A_ &w->timer);
2514 }
2515}
2516
2517static void noinline
2518infy_del (EV_P_ ev_stat *w)
2519{
2520 int slot;
2521 int wd = w->wd;
2522
2523 if (wd < 0)
920 return; 2524 return;
921 2525
2526 w->wd = -2;
2527 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2528 wlist_del (&fs_hash [slot].head, (WL)w);
2529
2530 /* remove this watcher, if others are watching it, they will rearm */
2531 inotify_rm_watch (fs_fd, wd);
2532}
2533
2534static void noinline
2535infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2536{
2537 if (slot < 0)
2538 /* overflow, need to check for all hash slots */
2539 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2540 infy_wd (EV_A_ slot, wd, ev);
2541 else
2542 {
2543 WL w_;
2544
2545 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2546 {
2547 ev_stat *w = (ev_stat *)w_;
2548 w_ = w_->next; /* lets us remove this watcher and all before it */
2549
2550 if (w->wd == wd || wd == -1)
2551 {
2552 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2553 {
2554 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2555 w->wd = -1;
2556 infy_add (EV_A_ w); /* re-add, no matter what */
2557 }
2558
2559 stat_timer_cb (EV_A_ &w->timer, 0);
2560 }
2561 }
2562 }
2563}
2564
2565static void
2566infy_cb (EV_P_ ev_io *w, int revents)
2567{
2568 char buf [EV_INOTIFY_BUFSIZE];
2569 struct inotify_event *ev = (struct inotify_event *)buf;
2570 int ofs;
2571 int len = read (fs_fd, buf, sizeof (buf));
2572
2573 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2574 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2575}
2576
2577void inline_size
2578check_2625 (EV_P)
2579{
2580 /* kernels < 2.6.25 are borked
2581 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2582 */
2583 struct utsname buf;
2584 int major, minor, micro;
2585
2586 if (uname (&buf))
2587 return;
2588
2589 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2590 return;
2591
2592 if (major < 2
2593 || (major == 2 && minor < 6)
2594 || (major == 2 && minor == 6 && micro < 25))
2595 return;
2596
2597 fs_2625 = 1;
2598}
2599
2600void inline_size
2601infy_init (EV_P)
2602{
2603 if (fs_fd != -2)
2604 return;
2605
2606 fs_fd = -1;
2607
2608 check_2625 (EV_A);
2609
2610 fs_fd = inotify_init ();
2611
2612 if (fs_fd >= 0)
2613 {
2614 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2615 ev_set_priority (&fs_w, EV_MAXPRI);
2616 ev_io_start (EV_A_ &fs_w);
2617 }
2618}
2619
2620void inline_size
2621infy_fork (EV_P)
2622{
2623 int slot;
2624
2625 if (fs_fd < 0)
2626 return;
2627
2628 close (fs_fd);
2629 fs_fd = inotify_init ();
2630
2631 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2632 {
2633 WL w_ = fs_hash [slot].head;
2634 fs_hash [slot].head = 0;
2635
2636 while (w_)
2637 {
2638 ev_stat *w = (ev_stat *)w_;
2639 w_ = w_->next; /* lets us add this watcher */
2640
2641 w->wd = -1;
2642
2643 if (fs_fd >= 0)
2644 infy_add (EV_A_ w); /* re-add, no matter what */
2645 else
2646 ev_timer_again (EV_A_ &w->timer);
2647 }
2648 }
2649}
2650
2651#endif
2652
2653#ifdef _WIN32
2654# define EV_LSTAT(p,b) _stati64 (p, b)
2655#else
2656# define EV_LSTAT(p,b) lstat (p, b)
2657#endif
2658
2659void
2660ev_stat_stat (EV_P_ ev_stat *w)
2661{
2662 if (lstat (w->path, &w->attr) < 0)
2663 w->attr.st_nlink = 0;
2664 else if (!w->attr.st_nlink)
2665 w->attr.st_nlink = 1;
2666}
2667
2668static void noinline
2669stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2670{
2671 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2672
2673 /* we copy this here each the time so that */
2674 /* prev has the old value when the callback gets invoked */
2675 w->prev = w->attr;
2676 ev_stat_stat (EV_A_ w);
2677
2678 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2679 if (
2680 w->prev.st_dev != w->attr.st_dev
2681 || w->prev.st_ino != w->attr.st_ino
2682 || w->prev.st_mode != w->attr.st_mode
2683 || w->prev.st_nlink != w->attr.st_nlink
2684 || w->prev.st_uid != w->attr.st_uid
2685 || w->prev.st_gid != w->attr.st_gid
2686 || w->prev.st_rdev != w->attr.st_rdev
2687 || w->prev.st_size != w->attr.st_size
2688 || w->prev.st_atime != w->attr.st_atime
2689 || w->prev.st_mtime != w->attr.st_mtime
2690 || w->prev.st_ctime != w->attr.st_ctime
2691 ) {
2692 #if EV_USE_INOTIFY
2693 if (fs_fd >= 0)
2694 {
2695 infy_del (EV_A_ w);
2696 infy_add (EV_A_ w);
2697 ev_stat_stat (EV_A_ w); /* avoid race... */
2698 }
2699 #endif
2700
2701 ev_feed_event (EV_A_ w, EV_STAT);
2702 }
2703}
2704
2705void
2706ev_stat_start (EV_P_ ev_stat *w)
2707{
2708 if (expect_false (ev_is_active (w)))
2709 return;
2710
2711 ev_stat_stat (EV_A_ w);
2712
2713 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2714 w->interval = MIN_STAT_INTERVAL;
2715
2716 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2717 ev_set_priority (&w->timer, ev_priority (w));
2718
2719#if EV_USE_INOTIFY
2720 infy_init (EV_A);
2721
2722 if (fs_fd >= 0)
2723 infy_add (EV_A_ w);
2724 else
2725#endif
2726 ev_timer_again (EV_A_ &w->timer);
2727
2728 ev_start (EV_A_ (W)w, 1);
2729
2730 EV_FREQUENT_CHECK;
2731}
2732
2733void
2734ev_stat_stop (EV_P_ ev_stat *w)
2735{
2736 clear_pending (EV_A_ (W)w);
2737 if (expect_false (!ev_is_active (w)))
2738 return;
2739
2740 EV_FREQUENT_CHECK;
2741
2742#if EV_USE_INOTIFY
2743 infy_del (EV_A_ w);
2744#endif
2745 ev_timer_stop (EV_A_ &w->timer);
2746
2747 ev_stop (EV_A_ (W)w);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751#endif
2752
2753#if EV_IDLE_ENABLE
2754void
2755ev_idle_start (EV_P_ ev_idle *w)
2756{
2757 if (expect_false (ev_is_active (w)))
2758 return;
2759
2760 pri_adjust (EV_A_ (W)w);
2761
2762 EV_FREQUENT_CHECK;
2763
2764 {
2765 int active = ++idlecnt [ABSPRI (w)];
2766
2767 ++idleall;
2768 ev_start (EV_A_ (W)w, active);
2769
2770 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2771 idles [ABSPRI (w)][active - 1] = w;
2772 }
2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void
2778ev_idle_stop (EV_P_ ev_idle *w)
2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
2782 return;
2783
2784 EV_FREQUENT_CHECK;
2785
2786 {
2787 int active = ev_active (w);
2788
2789 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2790 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2791
2792 ev_stop (EV_A_ (W)w);
2793 --idleall;
2794 }
2795
2796 EV_FREQUENT_CHECK;
2797}
2798#endif
2799
2800void
2801ev_prepare_start (EV_P_ ev_prepare *w)
2802{
2803 if (expect_false (ev_is_active (w)))
2804 return;
2805
2806 EV_FREQUENT_CHECK;
2807
922 ev_start ((W)w, ++preparecnt); 2808 ev_start (EV_A_ (W)w, ++preparecnt);
923 array_needsize (prepares, preparemax, preparecnt, ); 2809 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
924 prepares [preparecnt - 1] = w; 2810 prepares [preparecnt - 1] = w;
925}
926 2811
2812 EV_FREQUENT_CHECK;
2813}
2814
927void 2815void
928ev_prepare_stop (struct ev_prepare *w) 2816ev_prepare_stop (EV_P_ ev_prepare *w)
929{ 2817{
930 ev_clear ((W)w); 2818 clear_pending (EV_A_ (W)w);
931 if (ev_is_active (w)) 2819 if (expect_false (!ev_is_active (w)))
932 return; 2820 return;
933 2821
2822 EV_FREQUENT_CHECK;
2823
2824 {
2825 int active = ev_active (w);
2826
934 prepares [w->active - 1] = prepares [--preparecnt]; 2827 prepares [active - 1] = prepares [--preparecnt];
2828 ev_active (prepares [active - 1]) = active;
2829 }
2830
935 ev_stop ((W)w); 2831 ev_stop (EV_A_ (W)w);
936}
937 2832
2833 EV_FREQUENT_CHECK;
2834}
2835
938void 2836void
939ev_check_start (struct ev_check *w) 2837ev_check_start (EV_P_ ev_check *w)
940{ 2838{
941 if (ev_is_active (w)) 2839 if (expect_false (ev_is_active (w)))
942 return; 2840 return;
943 2841
2842 EV_FREQUENT_CHECK;
2843
944 ev_start ((W)w, ++checkcnt); 2844 ev_start (EV_A_ (W)w, ++checkcnt);
945 array_needsize (checks, checkmax, checkcnt, ); 2845 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
946 checks [checkcnt - 1] = w; 2846 checks [checkcnt - 1] = w;
947}
948 2847
2848 EV_FREQUENT_CHECK;
2849}
2850
949void 2851void
950ev_check_stop (struct ev_check *w) 2852ev_check_stop (EV_P_ ev_check *w)
951{ 2853{
952 ev_clear ((W)w); 2854 clear_pending (EV_A_ (W)w);
953 if (ev_is_active (w)) 2855 if (expect_false (!ev_is_active (w)))
954 return; 2856 return;
955 2857
2858 EV_FREQUENT_CHECK;
2859
2860 {
2861 int active = ev_active (w);
2862
956 checks [w->active - 1] = checks [--checkcnt]; 2863 checks [active - 1] = checks [--checkcnt];
2864 ev_active (checks [active - 1]) = active;
2865 }
2866
957 ev_stop ((W)w); 2867 ev_stop (EV_A_ (W)w);
958}
959 2868
960void 2869 EV_FREQUENT_CHECK;
961ev_child_start (struct ev_child *w) 2870}
2871
2872#if EV_EMBED_ENABLE
2873void noinline
2874ev_embed_sweep (EV_P_ ev_embed *w)
962{ 2875{
2876 ev_loop (w->other, EVLOOP_NONBLOCK);
2877}
2878
2879static void
2880embed_io_cb (EV_P_ ev_io *io, int revents)
2881{
2882 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2883
963 if (ev_is_active (w)) 2884 if (ev_cb (w))
2885 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2886 else
2887 ev_loop (w->other, EVLOOP_NONBLOCK);
2888}
2889
2890static void
2891embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2892{
2893 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2894
2895 {
2896 struct ev_loop *loop = w->other;
2897
2898 while (fdchangecnt)
2899 {
2900 fd_reify (EV_A);
2901 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2902 }
2903 }
2904}
2905
2906static void
2907embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2908{
2909 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2910
2911 ev_embed_stop (EV_A_ w);
2912
2913 {
2914 struct ev_loop *loop = w->other;
2915
2916 ev_loop_fork (EV_A);
2917 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2918 }
2919
2920 ev_embed_start (EV_A_ w);
2921}
2922
2923#if 0
2924static void
2925embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2926{
2927 ev_idle_stop (EV_A_ idle);
2928}
2929#endif
2930
2931void
2932ev_embed_start (EV_P_ ev_embed *w)
2933{
2934 if (expect_false (ev_is_active (w)))
964 return; 2935 return;
965 2936
2937 {
2938 struct ev_loop *loop = w->other;
2939 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2940 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2941 }
2942
2943 EV_FREQUENT_CHECK;
2944
2945 ev_set_priority (&w->io, ev_priority (w));
2946 ev_io_start (EV_A_ &w->io);
2947
2948 ev_prepare_init (&w->prepare, embed_prepare_cb);
2949 ev_set_priority (&w->prepare, EV_MINPRI);
2950 ev_prepare_start (EV_A_ &w->prepare);
2951
2952 ev_fork_init (&w->fork, embed_fork_cb);
2953 ev_fork_start (EV_A_ &w->fork);
2954
2955 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2956
966 ev_start ((W)w, 1); 2957 ev_start (EV_A_ (W)w, 1);
967 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968}
969 2958
2959 EV_FREQUENT_CHECK;
2960}
2961
970void 2962void
971ev_child_stop (struct ev_child *w) 2963ev_embed_stop (EV_P_ ev_embed *w)
972{ 2964{
973 ev_clear ((W)w); 2965 clear_pending (EV_A_ (W)w);
974 if (ev_is_active (w)) 2966 if (expect_false (!ev_is_active (w)))
975 return; 2967 return;
976 2968
977 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2969 EV_FREQUENT_CHECK;
2970
2971 ev_io_stop (EV_A_ &w->io);
2972 ev_prepare_stop (EV_A_ &w->prepare);
2973 ev_fork_stop (EV_A_ &w->fork);
2974
2975 EV_FREQUENT_CHECK;
2976}
2977#endif
2978
2979#if EV_FORK_ENABLE
2980void
2981ev_fork_start (EV_P_ ev_fork *w)
2982{
2983 if (expect_false (ev_is_active (w)))
2984 return;
2985
2986 EV_FREQUENT_CHECK;
2987
2988 ev_start (EV_A_ (W)w, ++forkcnt);
2989 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2990 forks [forkcnt - 1] = w;
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_fork_stop (EV_P_ ev_fork *w)
2997{
2998 clear_pending (EV_A_ (W)w);
2999 if (expect_false (!ev_is_active (w)))
3000 return;
3001
3002 EV_FREQUENT_CHECK;
3003
3004 {
3005 int active = ev_active (w);
3006
3007 forks [active - 1] = forks [--forkcnt];
3008 ev_active (forks [active - 1]) = active;
3009 }
3010
978 ev_stop ((W)w); 3011 ev_stop (EV_A_ (W)w);
3012
3013 EV_FREQUENT_CHECK;
979} 3014}
3015#endif
3016
3017#if EV_ASYNC_ENABLE
3018void
3019ev_async_start (EV_P_ ev_async *w)
3020{
3021 if (expect_false (ev_is_active (w)))
3022 return;
3023
3024 evpipe_init (EV_A);
3025
3026 EV_FREQUENT_CHECK;
3027
3028 ev_start (EV_A_ (W)w, ++asynccnt);
3029 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3030 asyncs [asynccnt - 1] = w;
3031
3032 EV_FREQUENT_CHECK;
3033}
3034
3035void
3036ev_async_stop (EV_P_ ev_async *w)
3037{
3038 clear_pending (EV_A_ (W)w);
3039 if (expect_false (!ev_is_active (w)))
3040 return;
3041
3042 EV_FREQUENT_CHECK;
3043
3044 {
3045 int active = ev_active (w);
3046
3047 asyncs [active - 1] = asyncs [--asynccnt];
3048 ev_active (asyncs [active - 1]) = active;
3049 }
3050
3051 ev_stop (EV_A_ (W)w);
3052
3053 EV_FREQUENT_CHECK;
3054}
3055
3056void
3057ev_async_send (EV_P_ ev_async *w)
3058{
3059 w->sent = 1;
3060 evpipe_write (EV_A_ &gotasync);
3061}
3062#endif
980 3063
981/*****************************************************************************/ 3064/*****************************************************************************/
982 3065
983struct ev_once 3066struct ev_once
984{ 3067{
985 struct ev_io io; 3068 ev_io io;
986 struct ev_timer to; 3069 ev_timer to;
987 void (*cb)(int revents, void *arg); 3070 void (*cb)(int revents, void *arg);
988 void *arg; 3071 void *arg;
989}; 3072};
990 3073
991static void 3074static void
992once_cb (struct ev_once *once, int revents) 3075once_cb (EV_P_ struct ev_once *once, int revents)
993{ 3076{
994 void (*cb)(int revents, void *arg) = once->cb; 3077 void (*cb)(int revents, void *arg) = once->cb;
995 void *arg = once->arg; 3078 void *arg = once->arg;
996 3079
997 ev_io_stop (&once->io); 3080 ev_io_stop (EV_A_ &once->io);
998 ev_timer_stop (&once->to); 3081 ev_timer_stop (EV_A_ &once->to);
999 free (once); 3082 ev_free (once);
1000 3083
1001 cb (revents, arg); 3084 cb (revents, arg);
1002} 3085}
1003 3086
1004static void 3087static void
1005once_cb_io (struct ev_io *w, int revents) 3088once_cb_io (EV_P_ ev_io *w, int revents)
1006{ 3089{
1007 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3090 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3091
3092 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1008} 3093}
1009 3094
1010static void 3095static void
1011once_cb_to (struct ev_timer *w, int revents) 3096once_cb_to (EV_P_ ev_timer *w, int revents)
1012{ 3097{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3098 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1014}
1015 3099
3100 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3101}
3102
1016void 3103void
1017ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3104ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1018{ 3105{
1019 struct ev_once *once = malloc (sizeof (struct ev_once)); 3106 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1020 3107
1021 if (!once) 3108 if (expect_false (!once))
1022 cb (EV_ERROR, arg); 3109 {
1023 else 3110 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3111 return;
1024 { 3112 }
3113
1025 once->cb = cb; 3114 once->cb = cb;
1026 once->arg = arg; 3115 once->arg = arg;
1027 3116
1028 ev_watcher_init (&once->io, once_cb_io); 3117 ev_init (&once->io, once_cb_io);
1029
1030 if (fd >= 0) 3118 if (fd >= 0)
1031 { 3119 {
1032 ev_io_set (&once->io, fd, events); 3120 ev_io_set (&once->io, fd, events);
1033 ev_io_start (&once->io); 3121 ev_io_start (EV_A_ &once->io);
1034 } 3122 }
1035 3123
1036 ev_watcher_init (&once->to, once_cb_to); 3124 ev_init (&once->to, once_cb_to);
1037
1038 if (timeout >= 0.) 3125 if (timeout >= 0.)
1039 { 3126 {
1040 ev_timer_set (&once->to, timeout, 0.); 3127 ev_timer_set (&once->to, timeout, 0.);
1041 ev_timer_start (&once->to); 3128 ev_timer_start (EV_A_ &once->to);
1042 }
1043 }
1044}
1045
1046/*****************************************************************************/
1047
1048#if 0
1049
1050struct ev_io wio;
1051
1052static void
1053sin_cb (struct ev_io *w, int revents)
1054{
1055 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056}
1057
1058static void
1059ocb (struct ev_timer *w, int revents)
1060{
1061 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062 ev_timer_stop (w);
1063 ev_timer_start (w);
1064}
1065
1066static void
1067scb (struct ev_signal *w, int revents)
1068{
1069 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070 ev_io_stop (&wio);
1071 ev_io_start (&wio);
1072}
1073
1074static void
1075gcb (struct ev_signal *w, int revents)
1076{
1077 fprintf (stderr, "generic %x\n", revents);
1078
1079}
1080
1081int main (void)
1082{
1083 ev_init (0);
1084
1085 ev_io_init (&wio, sin_cb, 0, EV_READ);
1086 ev_io_start (&wio);
1087
1088 struct ev_timer t[10000];
1089
1090#if 0
1091 int i;
1092 for (i = 0; i < 10000; ++i)
1093 { 3129 }
1094 struct ev_timer *w = t + i;
1095 ev_watcher_init (w, ocb, i);
1096 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097 ev_timer_start (w);
1098 if (drand48 () < 0.5)
1099 ev_timer_stop (w);
1100 }
1101#endif
1102
1103 struct ev_timer t1;
1104 ev_timer_init (&t1, ocb, 5, 10);
1105 ev_timer_start (&t1);
1106
1107 struct ev_signal sig;
1108 ev_signal_init (&sig, scb, SIGQUIT);
1109 ev_signal_start (&sig);
1110
1111 struct ev_check cw;
1112 ev_check_init (&cw, gcb);
1113 ev_check_start (&cw);
1114
1115 struct ev_idle iw;
1116 ev_idle_init (&iw, gcb);
1117 ev_idle_start (&iw);
1118
1119 ev_loop (0);
1120
1121 return 0;
1122} 3130}
1123 3131
3132#if EV_MULTIPLICITY
3133 #include "ev_wrap.h"
1124#endif 3134#endif
1125 3135
3136#ifdef __cplusplus
3137}
3138#endif
1126 3139
1127
1128

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