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Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.265 by root, Thu Oct 23 04:56:49 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
33#endif 132#endif
34 133
35#include <math.h> 134#include <math.h>
36#include <stdlib.h> 135#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 136#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 137#include <stddef.h>
41 138
42#include <stdio.h> 139#include <stdio.h>
43 140
44#include <assert.h> 141#include <assert.h>
45#include <errno.h> 142#include <errno.h>
46#include <sys/types.h> 143#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 144#include <time.h>
50 145
51/**/ 146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
164# endif
165#endif
166
167/* this block tries to deduce configuration from header-defined symbols and defaults */
52 168
53#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
54# define EV_USE_MONOTONIC 1 171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
55#endif 187#endif
56 188
57#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
59#endif 191#endif
60 192
61#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
63#endif 199#endif
64 200
65#ifndef EV_USE_EPOLL 201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
66# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
67#endif 206# endif
207#endif
68 208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
69#ifndef EV_USE_REALTIME 213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
70# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
71#endif 222# endif
223#endif
72 224
73/**/ 225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
74 268
75#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
78#endif 272#endif
… …
80#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
83#endif 277#endif
84 278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
300#if EV_SELECT_IS_WINSOCKET
301# include <winsock.h>
302#endif
303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
85/**/ 316/**/
86 317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
87#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
91 337
92#include "ev.h"
93
94#if __GNUC__ >= 3 338#if __GNUC__ >= 4
95# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
96# define inline inline 340# define noinline __attribute__ ((noinline))
97#else 341#else
98# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
99# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
100#endif 347#endif
101 348
102#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
104 352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
358
359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
361
362#define EMPTY /* required for microsofts broken pseudo-c compiler */
363#define EMPTY2(a,b) /* used to suppress some warnings */
364
105typedef struct ev_watcher *W; 365typedef ev_watcher *W;
106typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
107typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
108 368
109static ev_tstamp now_floor, now, diff; /* monotonic clock */ 369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
377
378#ifdef _WIN32
379# include "ev_win32.c"
380#endif
381
382/*****************************************************************************/
383
384static void (*syserr_cb)(const char *msg);
385
386void
387ev_set_syserr_cb (void (*cb)(const char *msg))
388{
389 syserr_cb = cb;
390}
391
392static void noinline
393syserr (const char *msg)
394{
395 if (!msg)
396 msg = "(libev) system error";
397
398 if (syserr_cb)
399 syserr_cb (msg);
400 else
401 {
402 perror (msg);
403 abort ();
404 }
405}
406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423
424void
425ev_set_allocator (void *(*cb)(void *ptr, long size))
426{
427 alloc = cb;
428}
429
430inline_speed void *
431ev_realloc (void *ptr, long size)
432{
433 ptr = alloc (ptr, size);
434
435 if (!ptr && size)
436 {
437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 abort ();
439 }
440
441 return ptr;
442}
443
444#define ev_malloc(size) ev_realloc (0, (size))
445#define ev_free(ptr) ev_realloc ((ptr), 0)
446
447/*****************************************************************************/
448
449typedef struct
450{
451 WL head;
452 unsigned char events;
453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char unused; /* currently unused padding */
456#if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458#endif
459} ANFD;
460
461typedef struct
462{
463 W w;
464 int events;
465} ANPENDING;
466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
492
493#if EV_MULTIPLICITY
494
495 struct ev_loop
496 {
497 ev_tstamp ev_rt_now;
498 #define ev_rt_now ((loop)->ev_rt_now)
499 #define VAR(name,decl) decl;
500 #include "ev_vars.h"
501 #undef VAR
502 };
503 #include "ev_wrap.h"
504
505 static struct ev_loop default_loop_struct;
506 struct ev_loop *ev_default_loop_ptr;
507
508#else
509
110ev_tstamp ev_now; 510 ev_tstamp ev_rt_now;
111int ev_method; 511 #define VAR(name,decl) static decl;
512 #include "ev_vars.h"
513 #undef VAR
112 514
113static int have_monotonic; /* runtime */ 515 static int ev_default_loop_ptr;
114 516
115static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 517#endif
116static void (*method_modify)(int fd, int oev, int nev);
117static void (*method_poll)(ev_tstamp timeout);
118 518
119/*****************************************************************************/ 519/*****************************************************************************/
120 520
121ev_tstamp 521ev_tstamp
122ev_time (void) 522ev_time (void)
… …
130 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
131 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
132#endif 532#endif
133} 533}
134 534
135static ev_tstamp 535ev_tstamp inline_size
136get_clock (void) 536get_clock (void)
137{ 537{
138#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
139 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
140 { 540 {
… …
145#endif 545#endif
146 546
147 return ev_time (); 547 return ev_time ();
148} 548}
149 549
150#define array_roundsize(base,n) ((n) | 4 & ~3) 550#if EV_MULTIPLICITY
551ev_tstamp
552ev_now (EV_P)
553{
554 return ev_rt_now;
555}
556#endif
151 557
152#define array_needsize(base,cur,cnt,init) \ 558void
153 if (expect_false ((cnt) > cur)) \ 559ev_sleep (ev_tstamp delay)
154 { \ 560{
155 int newcnt = cur; \ 561 if (delay > 0.)
156 do \
157 { \
158 newcnt = array_roundsize (base, newcnt << 1); \
159 } \
160 while ((cnt) > newcnt); \
161 \
162 base = realloc (base, sizeof (*base) * (newcnt)); \
163 init (base + cur, newcnt - cur); \
164 cur = newcnt; \
165 } 562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
166 585
167/*****************************************************************************/ 586/*****************************************************************************/
168 587
169typedef struct 588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
170{
171 struct ev_io *head;
172 unsigned char events;
173 unsigned char reify;
174} ANFD;
175 589
176static ANFD *anfds; 590int inline_size
177static int anfdmax; 591array_nextsize (int elem, int cur, int cnt)
178
179static void
180anfds_init (ANFD *base, int count)
181{ 592{
182 while (count--) 593 int ncur = cur + 1;
183 {
184 base->head = 0;
185 base->events = EV_NONE;
186 base->reify = 0;
187 594
188 ++base; 595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
189 } 601 {
190} 602 ncur *= elem;
191 603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
192typedef struct 604 ncur = ncur - sizeof (void *) * 4;
193{ 605 ncur /= elem;
194 W w;
195 int events;
196} ANPENDING;
197
198static ANPENDING *pendings;
199static int pendingmax, pendingcnt;
200
201static void
202event (W w, int events)
203{
204 if (w->pending)
205 { 606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
620
621#define array_needsize(type,base,cur,cnt,init) \
622 if (expect_false ((cnt) > (cur))) \
623 { \
624 int ocur_ = (cur); \
625 (base) = (type *)array_realloc \
626 (sizeof (type), (base), &(cur), (cnt)); \
627 init ((base) + (ocur_), (cur) - ocur_); \
628 }
629
630#if 0
631#define array_slim(type,stem) \
632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633 { \
634 stem ## max = array_roundsize (stem ## cnt >> 1); \
635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637 }
638#endif
639
640#define array_free(stem, idx) \
641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642
643/*****************************************************************************/
644
645void noinline
646ev_feed_event (EV_P_ void *w, int revents)
647{
648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
650
651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
206 pendings [w->pending - 1].events |= events; 658 pendings [pri][w_->pending - 1].events = revents;
207 return;
208 } 659 }
209
210 w->pending = ++pendingcnt;
211 array_needsize (pendings, pendingmax, pendingcnt, );
212 pendings [pendingcnt - 1].w = w;
213 pendings [pendingcnt - 1].events = events;
214} 660}
215 661
216static void 662void inline_speed
217queue_events (W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
218{ 664{
219 int i; 665 int i;
220 666
221 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
222 event (events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
223} 669}
224 670
225static void 671/*****************************************************************************/
672
673void inline_speed
226fd_event (int fd, int events) 674fd_event (EV_P_ int fd, int revents)
227{ 675{
228 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
229 struct ev_io *w; 677 ev_io *w;
230 678
231 for (w = anfd->head; w; w = w->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
232 { 680 {
233 int ev = w->events & events; 681 int ev = w->events & revents;
234 682
235 if (ev) 683 if (ev)
236 event ((W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
237 } 685 }
238} 686}
239 687
240/*****************************************************************************/ 688void
689ev_feed_fd_event (EV_P_ int fd, int revents)
690{
691 if (fd >= 0 && fd < anfdmax)
692 fd_event (EV_A_ fd, revents);
693}
241 694
242static int *fdchanges; 695void inline_size
243static int fdchangemax, fdchangecnt; 696fd_reify (EV_P)
244
245static void
246fd_reify (void)
247{ 697{
248 int i; 698 int i;
249 699
250 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
251 { 701 {
252 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
253 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
254 struct ev_io *w; 704 ev_io *w;
255 705
256 int events = 0; 706 unsigned char events = 0;
257 707
258 for (w = anfd->head; w; w = w->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
259 events |= w->events; 709 events |= (unsigned char)w->events;
260 710
261 anfd->reify = 0; 711#if EV_SELECT_IS_WINSOCKET
262 712 if (events)
263 if (anfd->events != events)
264 { 713 {
265 method_modify (fd, anfd->events, events); 714 unsigned long arg;
266 anfd->events = events; 715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
267 } 721 }
722#endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
728 anfd->reify = 0;
729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
268 } 734 }
269 735
270 fdchangecnt = 0; 736 fdchangecnt = 0;
271} 737}
272 738
273static void 739void inline_size
274fd_change (int fd) 740fd_change (EV_P_ int fd, int flags)
275{ 741{
276 if (anfds [fd].reify || fdchangecnt < 0) 742 unsigned char reify = anfds [fd].reify;
277 return;
278
279 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
280 744
745 if (expect_true (!reify))
746 {
281 ++fdchangecnt; 747 ++fdchangecnt;
282 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
283 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
284} 751}
285 752
286static void 753void inline_speed
287fd_kill (int fd) 754fd_kill (EV_P_ int fd)
288{ 755{
289 struct ev_io *w; 756 ev_io *w;
290 757
291 printf ("killing fd %d\n", fd);//D
292 while ((w = anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
293 { 759 {
294 ev_io_stop (w); 760 ev_io_stop (EV_A_ w);
295 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
296 } 762 }
763}
764
765int inline_size
766fd_valid (int fd)
767{
768#ifdef _WIN32
769 return _get_osfhandle (fd) != -1;
770#else
771 return fcntl (fd, F_GETFD) != -1;
772#endif
297} 773}
298 774
299/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
300static void 776static void noinline
301fd_ebadf (void) 777fd_ebadf (EV_P)
302{ 778{
303 int fd; 779 int fd;
304 780
305 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
306 if (anfds [fd].events) 782 if (anfds [fd].events)
307 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
308 fd_kill (fd); 784 fd_kill (EV_A_ fd);
309} 785}
310 786
311/* called on ENOMEM in select/poll to kill some fds and retry */ 787/* called on ENOMEM in select/poll to kill some fds and retry */
312static void 788static void noinline
313fd_enomem (void) 789fd_enomem (EV_P)
314{ 790{
315 int fd = anfdmax; 791 int fd;
316 792
317 while (fd--) 793 for (fd = anfdmax; fd--; )
318 if (anfds [fd].events) 794 if (anfds [fd].events)
319 { 795 {
320 close (fd);
321 fd_kill (fd); 796 fd_kill (EV_A_ fd);
322 return; 797 return;
323 } 798 }
324} 799}
325 800
801/* usually called after fork if backend needs to re-arm all fds from scratch */
802static void noinline
803fd_rearm_all (EV_P)
804{
805 int fd;
806
807 for (fd = 0; fd < anfdmax; ++fd)
808 if (anfds [fd].events)
809 {
810 anfds [fd].events = 0;
811 fd_change (EV_A_ fd, EV_IOFDSET | 1);
812 }
813}
814
326/*****************************************************************************/ 815/*****************************************************************************/
327 816
328static struct ev_timer **timers; 817/*
329static int timermax, timercnt; 818 * the heap functions want a real array index. array index 0 uis guaranteed to not
819 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
820 * the branching factor of the d-tree.
821 */
330 822
331static struct ev_periodic **periodics; 823/*
332static int periodicmax, periodiccnt; 824 * at the moment we allow libev the luxury of two heaps,
825 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
826 * which is more cache-efficient.
827 * the difference is about 5% with 50000+ watchers.
828 */
829#if EV_USE_4HEAP
333 830
334static void 831#define DHEAP 4
335upheap (WT *timers, int k) 832#define HEAP0 (DHEAP - 1) /* index of first element in heap */
336{ 833#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
337 WT w = timers [k]; 834#define UPHEAP_DONE(p,k) ((p) == (k))
338 835
339 while (k && timers [k >> 1]->at > w->at) 836/* away from the root */
340 { 837void inline_speed
341 timers [k] = timers [k >> 1];
342 timers [k]->active = k + 1;
343 k >>= 1;
344 }
345
346 timers [k] = w;
347 timers [k]->active = k + 1;
348
349}
350
351static void
352downheap (WT *timers, int N, int k) 838downheap (ANHE *heap, int N, int k)
353{ 839{
354 WT w = timers [k]; 840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
355 842
356 while (k < (N >> 1)) 843 for (;;)
357 { 844 {
358 int j = k << 1; 845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
359 848
360 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
361 ++j; 851 {
362 852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
363 if (w->at <= timers [j]->at) 853 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
856 }
857 else if (pos < E)
858 {
859 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else
364 break; 865 break;
365 866
366 timers [k] = timers [j]; 867 if (ANHE_at (he) <= minat)
367 timers [k]->active = k + 1; 868 break;
869
870 heap [k] = *minpos;
871 ev_active (ANHE_w (*minpos)) = k;
872
873 k = minpos - heap;
874 }
875
876 heap [k] = he;
877 ev_active (ANHE_w (he)) = k;
878}
879
880#else /* 4HEAP */
881
882#define HEAP0 1
883#define HPARENT(k) ((k) >> 1)
884#define UPHEAP_DONE(p,k) (!(p))
885
886/* away from the root */
887void inline_speed
888downheap (ANHE *heap, int N, int k)
889{
890 ANHE he = heap [k];
891
892 for (;;)
893 {
894 int c = k << 1;
895
896 if (c > N + HEAP0 - 1)
897 break;
898
899 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
900 ? 1 : 0;
901
902 if (ANHE_at (he) <= ANHE_at (heap [c]))
903 break;
904
905 heap [k] = heap [c];
906 ev_active (ANHE_w (heap [k])) = k;
907
368 k = j; 908 k = c;
909 }
910
911 heap [k] = he;
912 ev_active (ANHE_w (he)) = k;
913}
914#endif
915
916/* towards the root */
917void inline_speed
918upheap (ANHE *heap, int k)
919{
920 ANHE he = heap [k];
921
922 for (;;)
369 } 923 {
924 int p = HPARENT (k);
370 925
371 timers [k] = w; 926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
372 timers [k]->active = k + 1; 927 break;
928
929 heap [k] = heap [p];
930 ev_active (ANHE_w (heap [k])) = k;
931 k = p;
932 }
933
934 heap [k] = he;
935 ev_active (ANHE_w (he)) = k;
936}
937
938void inline_size
939adjustheap (ANHE *heap, int N, int k)
940{
941 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
942 upheap (heap, k);
943 else
944 downheap (heap, N, k);
945}
946
947/* rebuild the heap: this function is used only once and executed rarely */
948void inline_size
949reheap (ANHE *heap, int N)
950{
951 int i;
952
953 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
954 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
955 for (i = 0; i < N; ++i)
956 upheap (heap, i + HEAP0);
373} 957}
374 958
375/*****************************************************************************/ 959/*****************************************************************************/
376 960
377typedef struct 961typedef struct
378{ 962{
379 struct ev_signal *head; 963 WL head;
380 sig_atomic_t volatile gotsig; 964 EV_ATOMIC_T gotsig;
381} ANSIG; 965} ANSIG;
382 966
383static ANSIG *signals; 967static ANSIG *signals;
384static int signalmax; 968static int signalmax;
385 969
386static int sigpipe [2]; 970static EV_ATOMIC_T gotsig;
387static sig_atomic_t volatile gotsig; 971
388static struct ev_io sigev; 972/*****************************************************************************/
973
974void inline_speed
975fd_intern (int fd)
976{
977#ifdef _WIN32
978 unsigned long arg = 1;
979 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
980#else
981 fcntl (fd, F_SETFD, FD_CLOEXEC);
982 fcntl (fd, F_SETFL, O_NONBLOCK);
983#endif
984}
985
986static void noinline
987evpipe_init (EV_P)
988{
989 if (!ev_is_active (&pipeev))
990 {
991#if EV_USE_EVENTFD
992 if ((evfd = eventfd (0, 0)) >= 0)
993 {
994 evpipe [0] = -1;
995 fd_intern (evfd);
996 ev_io_set (&pipeev, evfd, EV_READ);
997 }
998 else
999#endif
1000 {
1001 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe");
1003
1004 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 }
1008
1009 ev_io_start (EV_A_ &pipeev);
1010 ev_unref (EV_A); /* watcher should not keep loop alive */
1011 }
1012}
1013
1014void inline_size
1015evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016{
1017 if (!*flag)
1018 {
1019 int old_errno = errno; /* save errno because write might clobber it */
1020
1021 *flag = 1;
1022
1023#if EV_USE_EVENTFD
1024 if (evfd >= 0)
1025 {
1026 uint64_t counter = 1;
1027 write (evfd, &counter, sizeof (uint64_t));
1028 }
1029 else
1030#endif
1031 write (evpipe [1], &old_errno, 1);
1032
1033 errno = old_errno;
1034 }
1035}
389 1036
390static void 1037static void
391signals_init (ANSIG *base, int count) 1038pipecb (EV_P_ ev_io *iow, int revents)
392{ 1039{
393 while (count--) 1040#if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
394 { 1045 }
395 base->head = 0; 1046 else
1047#endif
1048 {
1049 char dummy;
1050 read (evpipe [0], &dummy, 1);
1051 }
1052
1053 if (gotsig && ev_is_default_loop (EV_A))
1054 {
1055 int signum;
396 base->gotsig = 0; 1056 gotsig = 0;
397 1057
398 ++base; 1058 for (signum = signalmax; signum--; )
1059 if (signals [signum].gotsig)
1060 ev_feed_signal_event (EV_A_ signum + 1);
1061 }
1062
1063#if EV_ASYNC_ENABLE
1064 if (gotasync)
399 } 1065 {
1066 int i;
1067 gotasync = 0;
1068
1069 for (i = asynccnt; i--; )
1070 if (asyncs [i]->sent)
1071 {
1072 asyncs [i]->sent = 0;
1073 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1074 }
1075 }
1076#endif
400} 1077}
1078
1079/*****************************************************************************/
401 1080
402static void 1081static void
403sighandler (int signum) 1082ev_sighandler (int signum)
404{ 1083{
1084#if EV_MULTIPLICITY
1085 struct ev_loop *loop = &default_loop_struct;
1086#endif
1087
1088#if _WIN32
1089 signal (signum, ev_sighandler);
1090#endif
1091
405 signals [signum - 1].gotsig = 1; 1092 signals [signum - 1].gotsig = 1;
406 1093 evpipe_write (EV_A_ &gotsig);
407 if (!gotsig)
408 {
409 gotsig = 1;
410 write (sigpipe [1], &signum, 1);
411 }
412} 1094}
413 1095
414static void 1096void noinline
415sigcb (struct ev_io *iow, int revents) 1097ev_feed_signal_event (EV_P_ int signum)
416{ 1098{
417 struct ev_signal *w; 1099 WL w;
1100
1101#if EV_MULTIPLICITY
1102 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103#endif
1104
418 int signum; 1105 --signum;
419 1106
420 read (sigpipe [0], &revents, 1); 1107 if (signum < 0 || signum >= signalmax)
421 gotsig = 0; 1108 return;
422 1109
423 for (signum = signalmax; signum--; )
424 if (signals [signum].gotsig)
425 {
426 signals [signum].gotsig = 0; 1110 signals [signum].gotsig = 0;
427 1111
428 for (w = signals [signum].head; w; w = w->next) 1112 for (w = signals [signum].head; w; w = w->next)
429 event ((W)w, EV_SIGNAL); 1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
430 }
431}
432
433static void
434siginit (void)
435{
436 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
437 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
438
439 /* rather than sort out wether we really need nb, set it */
440 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
441 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
442
443 ev_io_set (&sigev, sigpipe [0], EV_READ);
444 ev_io_start (&sigev);
445} 1114}
446 1115
447/*****************************************************************************/ 1116/*****************************************************************************/
448 1117
449static struct ev_idle **idles; 1118static WL childs [EV_PID_HASHSIZE];
450static int idlemax, idlecnt;
451 1119
452static struct ev_prepare **prepares; 1120#ifndef _WIN32
453static int preparemax, preparecnt;
454 1121
455static struct ev_check **checks;
456static int checkmax, checkcnt;
457
458/*****************************************************************************/
459
460static struct ev_child *childs [PID_HASHSIZE];
461static struct ev_signal childev; 1122static ev_signal childev;
1123
1124#ifndef WIFCONTINUED
1125# define WIFCONTINUED(status) 0
1126#endif
1127
1128void inline_speed
1129child_reap (EV_P_ int chain, int pid, int status)
1130{
1131 ev_child *w;
1132 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133
1134 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1135 {
1136 if ((w->pid == pid || !w->pid)
1137 && (!traced || (w->flags & 1)))
1138 {
1139 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1140 w->rpid = pid;
1141 w->rstatus = status;
1142 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1143 }
1144 }
1145}
462 1146
463#ifndef WCONTINUED 1147#ifndef WCONTINUED
464# define WCONTINUED 0 1148# define WCONTINUED 0
465#endif 1149#endif
466 1150
467static void 1151static void
468childcb (struct ev_signal *sw, int revents) 1152childcb (EV_P_ ev_signal *sw, int revents)
469{ 1153{
470 struct ev_child *w;
471 int pid, status; 1154 int pid, status;
472 1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
473 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
474 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1158 if (!WCONTINUED
475 if (w->pid == pid || !w->pid) 1159 || errno != EINVAL
476 { 1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
477 w->status = status; 1161 return;
478 event ((W)w, EV_CHILD); 1162
479 } 1163 /* make sure we are called again until all children have been reaped */
1164 /* we need to do it this way so that the callback gets called before we continue */
1165 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1166
1167 child_reap (EV_A_ pid, pid, status);
1168 if (EV_PID_HASHSIZE > 1)
1169 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
480} 1170}
1171
1172#endif
481 1173
482/*****************************************************************************/ 1174/*****************************************************************************/
483 1175
1176#if EV_USE_PORT
1177# include "ev_port.c"
1178#endif
1179#if EV_USE_KQUEUE
1180# include "ev_kqueue.c"
1181#endif
484#if EV_USE_EPOLL 1182#if EV_USE_EPOLL
485# include "ev_epoll.c" 1183# include "ev_epoll.c"
486#endif 1184#endif
487#if EV_USE_POLL 1185#if EV_USE_POLL
488# include "ev_poll.c" 1186# include "ev_poll.c"
… …
501ev_version_minor (void) 1199ev_version_minor (void)
502{ 1200{
503 return EV_VERSION_MINOR; 1201 return EV_VERSION_MINOR;
504} 1202}
505 1203
506/* return true if we are running with elevated privileges and ignore env variables */ 1204/* return true if we are running with elevated privileges and should ignore env variables */
507static int 1205int inline_size
508enable_secure () 1206enable_secure (void)
509{ 1207{
1208#ifdef _WIN32
1209 return 0;
1210#else
510 return getuid () != geteuid () 1211 return getuid () != geteuid ()
511 || getgid () != getegid (); 1212 || getgid () != getegid ();
1213#endif
512} 1214}
513 1215
514int ev_init (int methods) 1216unsigned int
1217ev_supported_backends (void)
515{ 1218{
516 if (!ev_method) 1219 unsigned int flags = 0;
1220
1221 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1222 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1223 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1224 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1225 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1226
1227 return flags;
1228}
1229
1230unsigned int
1231ev_recommended_backends (void)
1232{
1233 unsigned int flags = ev_supported_backends ();
1234
1235#ifndef __NetBSD__
1236 /* kqueue is borked on everything but netbsd apparently */
1237 /* it usually doesn't work correctly on anything but sockets and pipes */
1238 flags &= ~EVBACKEND_KQUEUE;
1239#endif
1240#ifdef __APPLE__
1241 // flags &= ~EVBACKEND_KQUEUE; for documentation
1242 flags &= ~EVBACKEND_POLL;
1243#endif
1244
1245 return flags;
1246}
1247
1248unsigned int
1249ev_embeddable_backends (void)
1250{
1251 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1252
1253 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1254 /* please fix it and tell me how to detect the fix */
1255 flags &= ~EVBACKEND_EPOLL;
1256
1257 return flags;
1258}
1259
1260unsigned int
1261ev_backend (EV_P)
1262{
1263 return backend;
1264}
1265
1266unsigned int
1267ev_loop_count (EV_P)
1268{
1269 return loop_count;
1270}
1271
1272void
1273ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274{
1275 io_blocktime = interval;
1276}
1277
1278void
1279ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280{
1281 timeout_blocktime = interval;
1282}
1283
1284static void noinline
1285loop_init (EV_P_ unsigned int flags)
1286{
1287 if (!backend)
517 { 1288 {
518#if EV_USE_MONOTONIC 1289#if EV_USE_MONOTONIC
519 { 1290 {
520 struct timespec ts; 1291 struct timespec ts;
521 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
522 have_monotonic = 1; 1293 have_monotonic = 1;
523 } 1294 }
524#endif 1295#endif
525 1296
526 ev_now = ev_time (); 1297 ev_rt_now = ev_time ();
527 now = get_clock (); 1298 mn_now = get_clock ();
528 now_floor = now; 1299 now_floor = mn_now;
529 diff = ev_now - now; 1300 rtmn_diff = ev_rt_now - mn_now;
530 1301
531 if (pipe (sigpipe)) 1302 io_blocktime = 0.;
532 return 0; 1303 timeout_blocktime = 0.;
1304 backend = 0;
1305 backend_fd = -1;
1306 gotasync = 0;
1307#if EV_USE_INOTIFY
1308 fs_fd = -2;
1309#endif
533 1310
534 if (methods == EVMETHOD_AUTO) 1311 /* pid check not overridable via env */
535 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1312#ifndef _WIN32
1313 if (flags & EVFLAG_FORKCHECK)
1314 curpid = getpid ();
1315#endif
1316
1317 if (!(flags & EVFLAG_NOENV)
1318 && !enable_secure ()
1319 && getenv ("LIBEV_FLAGS"))
536 methods = atoi (getenv ("LIBEV_METHODS")); 1320 flags = atoi (getenv ("LIBEV_FLAGS"));
537 else
538 methods = EVMETHOD_ANY;
539 1321
540 ev_method = 0; 1322 if (!(flags & 0x0000ffffU))
1323 flags |= ev_recommended_backends ();
1324
1325#if EV_USE_PORT
1326 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1327#endif
1328#if EV_USE_KQUEUE
1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1330#endif
541#if EV_USE_EPOLL 1331#if EV_USE_EPOLL
542 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); 1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
543#endif 1333#endif
544#if EV_USE_POLL 1334#if EV_USE_POLL
545 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); 1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
546#endif 1336#endif
547#if EV_USE_SELECT 1337#if EV_USE_SELECT
548 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); 1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
549#endif 1339#endif
550 1340
551 if (ev_method) 1341 ev_init (&pipeev, pipecb);
1342 ev_set_priority (&pipeev, EV_MAXPRI);
1343 }
1344}
1345
1346static void noinline
1347loop_destroy (EV_P)
1348{
1349 int i;
1350
1351 if (ev_is_active (&pipeev))
1352 {
1353 ev_ref (EV_A); /* signal watcher */
1354 ev_io_stop (EV_A_ &pipeev);
1355
1356#if EV_USE_EVENTFD
1357 if (evfd >= 0)
1358 close (evfd);
1359#endif
1360
1361 if (evpipe [0] >= 0)
552 { 1362 {
553 ev_watcher_init (&sigev, sigcb); 1363 close (evpipe [0]);
554 siginit (); 1364 close (evpipe [1]);
1365 }
1366 }
555 1367
1368#if EV_USE_INOTIFY
1369 if (fs_fd >= 0)
1370 close (fs_fd);
1371#endif
1372
1373 if (backend_fd >= 0)
1374 close (backend_fd);
1375
1376#if EV_USE_PORT
1377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1378#endif
1379#if EV_USE_KQUEUE
1380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1381#endif
1382#if EV_USE_EPOLL
1383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1384#endif
1385#if EV_USE_POLL
1386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1387#endif
1388#if EV_USE_SELECT
1389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1390#endif
1391
1392 for (i = NUMPRI; i--; )
1393 {
1394 array_free (pending, [i]);
1395#if EV_IDLE_ENABLE
1396 array_free (idle, [i]);
1397#endif
1398 }
1399
1400 ev_free (anfds); anfdmax = 0;
1401
1402 /* have to use the microsoft-never-gets-it-right macro */
1403 array_free (fdchange, EMPTY);
1404 array_free (timer, EMPTY);
1405#if EV_PERIODIC_ENABLE
1406 array_free (periodic, EMPTY);
1407#endif
1408#if EV_FORK_ENABLE
1409 array_free (fork, EMPTY);
1410#endif
1411 array_free (prepare, EMPTY);
1412 array_free (check, EMPTY);
1413#if EV_ASYNC_ENABLE
1414 array_free (async, EMPTY);
1415#endif
1416
1417 backend = 0;
1418}
1419
1420#if EV_USE_INOTIFY
1421void inline_size infy_fork (EV_P);
1422#endif
1423
1424void inline_size
1425loop_fork (EV_P)
1426{
1427#if EV_USE_PORT
1428 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429#endif
1430#if EV_USE_KQUEUE
1431 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1432#endif
1433#if EV_USE_EPOLL
1434 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1435#endif
1436#if EV_USE_INOTIFY
1437 infy_fork (EV_A);
1438#endif
1439
1440 if (ev_is_active (&pipeev))
1441 {
1442 /* this "locks" the handlers against writing to the pipe */
1443 /* while we modify the fd vars */
1444 gotsig = 1;
1445#if EV_ASYNC_ENABLE
1446 gotasync = 1;
1447#endif
1448
1449 ev_ref (EV_A);
1450 ev_io_stop (EV_A_ &pipeev);
1451
1452#if EV_USE_EVENTFD
1453 if (evfd >= 0)
1454 close (evfd);
1455#endif
1456
1457 if (evpipe [0] >= 0)
1458 {
1459 close (evpipe [0]);
1460 close (evpipe [1]);
1461 }
1462
1463 evpipe_init (EV_A);
1464 /* now iterate over everything, in case we missed something */
1465 pipecb (EV_A_ &pipeev, EV_READ);
1466 }
1467
1468 postfork = 0;
1469}
1470
1471#if EV_MULTIPLICITY
1472
1473struct ev_loop *
1474ev_loop_new (unsigned int flags)
1475{
1476 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1477
1478 memset (loop, 0, sizeof (struct ev_loop));
1479
1480 loop_init (EV_A_ flags);
1481
1482 if (ev_backend (EV_A))
1483 return loop;
1484
1485 return 0;
1486}
1487
1488void
1489ev_loop_destroy (EV_P)
1490{
1491 loop_destroy (EV_A);
1492 ev_free (loop);
1493}
1494
1495void
1496ev_loop_fork (EV_P)
1497{
1498 postfork = 1; /* must be in line with ev_default_fork */
1499}
1500
1501#if EV_VERIFY
1502static void noinline
1503verify_watcher (EV_P_ W w)
1504{
1505 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506
1507 if (w->pending)
1508 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509}
1510
1511static void noinline
1512verify_heap (EV_P_ ANHE *heap, int N)
1513{
1514 int i;
1515
1516 for (i = HEAP0; i < N + HEAP0; ++i)
1517 {
1518 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1521
1522 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523 }
1524}
1525
1526static void noinline
1527array_verify (EV_P_ W *ws, int cnt)
1528{
1529 while (cnt--)
1530 {
1531 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532 verify_watcher (EV_A_ ws [cnt]);
1533 }
1534}
1535#endif
1536
1537void
1538ev_loop_verify (EV_P)
1539{
1540#if EV_VERIFY
1541 int i;
1542 WL w;
1543
1544 assert (activecnt >= -1);
1545
1546 assert (fdchangemax >= fdchangecnt);
1547 for (i = 0; i < fdchangecnt; ++i)
1548 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1549
1550 assert (anfdmax >= 0);
1551 for (i = 0; i < anfdmax; ++i)
1552 for (w = anfds [i].head; w; w = w->next)
1553 {
1554 verify_watcher (EV_A_ (W)w);
1555 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1556 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1557 }
1558
1559 assert (timermax >= timercnt);
1560 verify_heap (EV_A_ timers, timercnt);
1561
1562#if EV_PERIODIC_ENABLE
1563 assert (periodicmax >= periodiccnt);
1564 verify_heap (EV_A_ periodics, periodiccnt);
1565#endif
1566
1567 for (i = NUMPRI; i--; )
1568 {
1569 assert (pendingmax [i] >= pendingcnt [i]);
1570#if EV_IDLE_ENABLE
1571 assert (idleall >= 0);
1572 assert (idlemax [i] >= idlecnt [i]);
1573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1574#endif
1575 }
1576
1577#if EV_FORK_ENABLE
1578 assert (forkmax >= forkcnt);
1579 array_verify (EV_A_ (W *)forks, forkcnt);
1580#endif
1581
1582#if EV_ASYNC_ENABLE
1583 assert (asyncmax >= asynccnt);
1584 array_verify (EV_A_ (W *)asyncs, asynccnt);
1585#endif
1586
1587 assert (preparemax >= preparecnt);
1588 array_verify (EV_A_ (W *)prepares, preparecnt);
1589
1590 assert (checkmax >= checkcnt);
1591 array_verify (EV_A_ (W *)checks, checkcnt);
1592
1593# if 0
1594 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1595 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1596# endif
1597#endif
1598}
1599
1600#endif /* multiplicity */
1601
1602#if EV_MULTIPLICITY
1603struct ev_loop *
1604ev_default_loop_init (unsigned int flags)
1605#else
1606int
1607ev_default_loop (unsigned int flags)
1608#endif
1609{
1610 if (!ev_default_loop_ptr)
1611 {
1612#if EV_MULTIPLICITY
1613 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1614#else
1615 ev_default_loop_ptr = 1;
1616#endif
1617
1618 loop_init (EV_A_ flags);
1619
1620 if (ev_backend (EV_A))
1621 {
1622#ifndef _WIN32
556 ev_signal_init (&childev, childcb, SIGCHLD); 1623 ev_signal_init (&childev, childcb, SIGCHLD);
1624 ev_set_priority (&childev, EV_MAXPRI);
557 ev_signal_start (&childev); 1625 ev_signal_start (EV_A_ &childev);
1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
1627#endif
558 } 1628 }
1629 else
1630 ev_default_loop_ptr = 0;
559 } 1631 }
560 1632
561 return ev_method; 1633 return ev_default_loop_ptr;
1634}
1635
1636void
1637ev_default_destroy (void)
1638{
1639#if EV_MULTIPLICITY
1640 struct ev_loop *loop = ev_default_loop_ptr;
1641#endif
1642
1643#ifndef _WIN32
1644 ev_ref (EV_A); /* child watcher */
1645 ev_signal_stop (EV_A_ &childev);
1646#endif
1647
1648 loop_destroy (EV_A);
1649}
1650
1651void
1652ev_default_fork (void)
1653{
1654#if EV_MULTIPLICITY
1655 struct ev_loop *loop = ev_default_loop_ptr;
1656#endif
1657
1658 if (backend)
1659 postfork = 1; /* must be in line with ev_loop_fork */
562} 1660}
563 1661
564/*****************************************************************************/ 1662/*****************************************************************************/
565 1663
566void 1664void
567ev_fork_prepare (void) 1665ev_invoke (EV_P_ void *w, int revents)
568{ 1666{
569 /* nop */ 1667 EV_CB_INVOKE ((W)w, revents);
570} 1668}
571 1669
572void 1670void inline_speed
573ev_fork_parent (void)
574{
575 /* nop */
576}
577
578void
579ev_fork_child (void)
580{
581#if EV_USE_EPOLL
582 if (ev_method == EVMETHOD_EPOLL)
583 epoll_postfork_child ();
584#endif
585
586 ev_io_stop (&sigev);
587 close (sigpipe [0]);
588 close (sigpipe [1]);
589 pipe (sigpipe);
590 siginit ();
591}
592
593/*****************************************************************************/
594
595static void
596call_pending (void) 1671call_pending (EV_P)
597{ 1672{
1673 int pri;
1674
1675 for (pri = NUMPRI; pri--; )
598 while (pendingcnt) 1676 while (pendingcnt [pri])
599 { 1677 {
600 ANPENDING *p = pendings + --pendingcnt; 1678 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
601 1679
602 if (p->w) 1680 if (expect_true (p->w))
1681 {
1682 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1683
1684 p->w->pending = 0;
1685 EV_CB_INVOKE (p->w, p->events);
1686 EV_FREQUENT_CHECK;
1687 }
1688 }
1689}
1690
1691#if EV_IDLE_ENABLE
1692void inline_size
1693idle_reify (EV_P)
1694{
1695 if (expect_false (idleall))
1696 {
1697 int pri;
1698
1699 for (pri = NUMPRI; pri--; )
603 { 1700 {
604 p->w->pending = 0; 1701 if (pendingcnt [pri])
605 p->w->cb (p->w, p->events); 1702 break;
1703
1704 if (idlecnt [pri])
1705 {
1706 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1707 break;
1708 }
606 } 1709 }
607 } 1710 }
608} 1711}
1712#endif
609 1713
610static void 1714void inline_size
611timers_reify (void) 1715timers_reify (EV_P)
612{ 1716{
1717 EV_FREQUENT_CHECK;
1718
613 while (timercnt && timers [0]->at <= now) 1719 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
614 { 1720 {
615 struct ev_timer *w = timers [0]; 1721 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1722
1723 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
616 1724
617 /* first reschedule or stop timer */ 1725 /* first reschedule or stop timer */
618 if (w->repeat) 1726 if (w->repeat)
619 { 1727 {
1728 ev_at (w) += w->repeat;
1729 if (ev_at (w) < mn_now)
1730 ev_at (w) = mn_now;
1731
620 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1732 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
621 w->at = now + w->repeat; 1733
1734 ANHE_at_cache (timers [HEAP0]);
622 downheap ((WT *)timers, timercnt, 0); 1735 downheap (timers, timercnt, HEAP0);
623 } 1736 }
624 else 1737 else
625 ev_timer_stop (w); /* nonrepeating: stop timer */ 1738 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
626 1739
1740 EV_FREQUENT_CHECK;
627 event ((W)w, EV_TIMEOUT); 1741 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
628 } 1742 }
629} 1743}
630 1744
631static void 1745#if EV_PERIODIC_ENABLE
1746void inline_size
632periodics_reify (void) 1747periodics_reify (EV_P)
633{ 1748{
1749 EV_FREQUENT_CHECK;
1750
634 while (periodiccnt && periodics [0]->at <= ev_now) 1751 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
635 { 1752 {
636 struct ev_periodic *w = periodics [0]; 1753 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1754
1755 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
637 1756
638 /* first reschedule or stop timer */ 1757 /* first reschedule or stop timer */
639 if (w->interval) 1758 if (w->reschedule_cb)
640 { 1759 {
641 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1760 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
642 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1761
1762 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1763
1764 ANHE_at_cache (periodics [HEAP0]);
643 downheap ((WT *)periodics, periodiccnt, 0); 1765 downheap (periodics, periodiccnt, HEAP0);
1766 }
1767 else if (w->interval)
1768 {
1769 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1770 /* if next trigger time is not sufficiently in the future, put it there */
1771 /* this might happen because of floating point inexactness */
1772 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1773 {
1774 ev_at (w) += w->interval;
1775
1776 /* if interval is unreasonably low we might still have a time in the past */
1777 /* so correct this. this will make the periodic very inexact, but the user */
1778 /* has effectively asked to get triggered more often than possible */
1779 if (ev_at (w) < ev_rt_now)
1780 ev_at (w) = ev_rt_now;
1781 }
1782
1783 ANHE_at_cache (periodics [HEAP0]);
1784 downheap (periodics, periodiccnt, HEAP0);
644 } 1785 }
645 else 1786 else
646 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1787 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
647 1788
1789 EV_FREQUENT_CHECK;
648 event ((W)w, EV_PERIODIC); 1790 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
649 } 1791 }
650} 1792}
651 1793
652static void 1794static void noinline
653periodics_reschedule (ev_tstamp diff) 1795periodics_reschedule (EV_P)
654{ 1796{
655 int i; 1797 int i;
656 1798
657 /* adjust periodics after time jump */ 1799 /* adjust periodics after time jump */
658 for (i = 0; i < periodiccnt; ++i) 1800 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
659 { 1801 {
660 struct ev_periodic *w = periodics [i]; 1802 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
661 1803
1804 if (w->reschedule_cb)
1805 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
662 if (w->interval) 1806 else if (w->interval)
1807 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1808
1809 ANHE_at_cache (periodics [i]);
1810 }
1811
1812 reheap (periodics, periodiccnt);
1813}
1814#endif
1815
1816void inline_speed
1817time_update (EV_P_ ev_tstamp max_block)
1818{
1819 int i;
1820
1821#if EV_USE_MONOTONIC
1822 if (expect_true (have_monotonic))
1823 {
1824 ev_tstamp odiff = rtmn_diff;
1825
1826 mn_now = get_clock ();
1827
1828 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1829 /* interpolate in the meantime */
1830 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
663 { 1831 {
664 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1832 ev_rt_now = rtmn_diff + mn_now;
1833 return;
1834 }
665 1835
666 if (fabs (diff) >= 1e-4) 1836 now_floor = mn_now;
1837 ev_rt_now = ev_time ();
1838
1839 /* loop a few times, before making important decisions.
1840 * on the choice of "4": one iteration isn't enough,
1841 * in case we get preempted during the calls to
1842 * ev_time and get_clock. a second call is almost guaranteed
1843 * to succeed in that case, though. and looping a few more times
1844 * doesn't hurt either as we only do this on time-jumps or
1845 * in the unlikely event of having been preempted here.
1846 */
1847 for (i = 4; --i; )
1848 {
1849 rtmn_diff = ev_rt_now - mn_now;
1850
1851 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1852 return; /* all is well */
1853
1854 ev_rt_now = ev_time ();
1855 mn_now = get_clock ();
1856 now_floor = mn_now;
1857 }
1858
1859# if EV_PERIODIC_ENABLE
1860 periodics_reschedule (EV_A);
1861# endif
1862 /* no timer adjustment, as the monotonic clock doesn't jump */
1863 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864 }
1865 else
1866#endif
1867 {
1868 ev_rt_now = ev_time ();
1869
1870 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1871 {
1872#if EV_PERIODIC_ENABLE
1873 periodics_reschedule (EV_A);
1874#endif
1875 /* adjust timers. this is easy, as the offset is the same for all of them */
1876 for (i = 0; i < timercnt; ++i)
667 { 1877 {
668 ev_periodic_stop (w); 1878 ANHE *he = timers + i + HEAP0;
669 ev_periodic_start (w); 1879 ANHE_w (*he)->at += ev_rt_now - mn_now;
670 1880 ANHE_at_cache (*he);
671 i = 0; /* restart loop, inefficient, but time jumps should be rare */
672 } 1881 }
673 } 1882 }
674 }
675}
676 1883
677static int
678time_update_monotonic (void)
679{
680 now = get_clock ();
681
682 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
683 {
684 ev_now = now + diff;
685 return 0;
686 }
687 else
688 {
689 now_floor = now;
690 ev_now = ev_time ();
691 return 1;
692 }
693}
694
695static void
696time_update (void)
697{
698 int i;
699
700#if EV_USE_MONOTONIC
701 if (expect_true (have_monotonic))
702 {
703 if (time_update_monotonic ())
704 {
705 ev_tstamp odiff = diff;
706
707 for (i = 4; --i; ) /* loop a few times, before making important decisions */
708 {
709 diff = ev_now - now;
710
711 if (fabs (odiff - diff) < MIN_TIMEJUMP)
712 return; /* all is well */
713
714 ev_now = ev_time ();
715 now = get_clock ();
716 now_floor = now;
717 }
718
719 periodics_reschedule (diff - odiff);
720 /* no timer adjustment, as the monotonic clock doesn't jump */
721 }
722 }
723 else
724#endif
725 {
726 ev_now = ev_time ();
727
728 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
729 {
730 periodics_reschedule (ev_now - now);
731
732 /* adjust timers. this is easy, as the offset is the same for all */
733 for (i = 0; i < timercnt; ++i)
734 timers [i]->at += diff;
735 }
736
737 now = ev_now; 1884 mn_now = ev_rt_now;
738 } 1885 }
739} 1886}
740 1887
741int ev_loop_done; 1888void
1889ev_ref (EV_P)
1890{
1891 ++activecnt;
1892}
742 1893
1894void
1895ev_unref (EV_P)
1896{
1897 --activecnt;
1898}
1899
1900void
1901ev_now_update (EV_P)
1902{
1903 time_update (EV_A_ 1e100);
1904}
1905
1906static int loop_done;
1907
1908void
743void ev_loop (int flags) 1909ev_loop (EV_P_ int flags)
744{ 1910{
745 double block; 1911 loop_done = EVUNLOOP_CANCEL;
746 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1912
1913 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
747 1914
748 do 1915 do
749 { 1916 {
1917#if EV_VERIFY >= 2
1918 ev_loop_verify (EV_A);
1919#endif
1920
1921#ifndef _WIN32
1922 if (expect_false (curpid)) /* penalise the forking check even more */
1923 if (expect_false (getpid () != curpid))
1924 {
1925 curpid = getpid ();
1926 postfork = 1;
1927 }
1928#endif
1929
1930#if EV_FORK_ENABLE
1931 /* we might have forked, so queue fork handlers */
1932 if (expect_false (postfork))
1933 if (forkcnt)
1934 {
1935 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1936 call_pending (EV_A);
1937 }
1938#endif
1939
750 /* queue check watchers (and execute them) */ 1940 /* queue prepare watchers (and execute them) */
751 if (expect_false (preparecnt)) 1941 if (expect_false (preparecnt))
752 { 1942 {
753 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1943 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
754 call_pending (); 1944 call_pending (EV_A);
755 } 1945 }
756 1946
1947 if (expect_false (!activecnt))
1948 break;
1949
1950 /* we might have forked, so reify kernel state if necessary */
1951 if (expect_false (postfork))
1952 loop_fork (EV_A);
1953
757 /* update fd-related kernel structures */ 1954 /* update fd-related kernel structures */
758 fd_reify (); 1955 fd_reify (EV_A);
759 1956
760 /* calculate blocking time */ 1957 /* calculate blocking time */
1958 {
1959 ev_tstamp waittime = 0.;
1960 ev_tstamp sleeptime = 0.;
761 1961
762 /* we only need this for !monotonic clockor timers, but as we basically 1962 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
763 always have timers, we just calculate it always */
764#if EV_USE_MONOTONIC
765 if (expect_true (have_monotonic))
766 time_update_monotonic ();
767 else
768#endif
769 { 1963 {
770 ev_now = ev_time (); 1964 /* update time to cancel out callback processing overhead */
771 now = ev_now; 1965 time_update (EV_A_ 1e100);
772 }
773 1966
774 if (flags & EVLOOP_NONBLOCK || idlecnt)
775 block = 0.;
776 else
777 {
778 block = MAX_BLOCKTIME; 1967 waittime = MAX_BLOCKTIME;
779 1968
780 if (timercnt) 1969 if (timercnt)
781 { 1970 {
782 ev_tstamp to = timers [0]->at - now + method_fudge; 1971 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
783 if (block > to) block = to; 1972 if (waittime > to) waittime = to;
784 } 1973 }
785 1974
1975#if EV_PERIODIC_ENABLE
786 if (periodiccnt) 1976 if (periodiccnt)
787 { 1977 {
788 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1978 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
789 if (block > to) block = to; 1979 if (waittime > to) waittime = to;
790 } 1980 }
1981#endif
791 1982
792 if (block < 0.) block = 0.; 1983 if (expect_false (waittime < timeout_blocktime))
1984 waittime = timeout_blocktime;
1985
1986 sleeptime = waittime - backend_fudge;
1987
1988 if (expect_true (sleeptime > io_blocktime))
1989 sleeptime = io_blocktime;
1990
1991 if (sleeptime)
1992 {
1993 ev_sleep (sleeptime);
1994 waittime -= sleeptime;
1995 }
793 } 1996 }
794 1997
795 method_poll (block); 1998 ++loop_count;
1999 backend_poll (EV_A_ waittime);
796 2000
797 /* update ev_now, do magic */ 2001 /* update ev_rt_now, do magic */
798 time_update (); 2002 time_update (EV_A_ waittime + sleeptime);
2003 }
799 2004
800 /* queue pending timers and reschedule them */ 2005 /* queue pending timers and reschedule them */
801 timers_reify (); /* relative timers called last */ 2006 timers_reify (EV_A); /* relative timers called last */
2007#if EV_PERIODIC_ENABLE
802 periodics_reify (); /* absolute timers called first */ 2008 periodics_reify (EV_A); /* absolute timers called first */
2009#endif
803 2010
2011#if EV_IDLE_ENABLE
804 /* queue idle watchers unless io or timers are pending */ 2012 /* queue idle watchers unless other events are pending */
805 if (!pendingcnt) 2013 idle_reify (EV_A);
806 queue_events ((W *)idles, idlecnt, EV_IDLE); 2014#endif
807 2015
808 /* queue check watchers, to be executed first */ 2016 /* queue check watchers, to be executed first */
809 if (checkcnt) 2017 if (expect_false (checkcnt))
810 queue_events ((W *)checks, checkcnt, EV_CHECK); 2018 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
811 2019
812 call_pending (); 2020 call_pending (EV_A);
813 } 2021 }
814 while (!ev_loop_done); 2022 while (expect_true (
2023 activecnt
2024 && !loop_done
2025 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2026 ));
815 2027
816 if (ev_loop_done != 2) 2028 if (loop_done == EVUNLOOP_ONE)
2029 loop_done = EVUNLOOP_CANCEL;
2030}
2031
2032void
2033ev_unloop (EV_P_ int how)
2034{
817 ev_loop_done = 0; 2035 loop_done = how;
818} 2036}
819 2037
820/*****************************************************************************/ 2038/*****************************************************************************/
821 2039
822static void 2040void inline_size
823wlist_add (WL *head, WL elem) 2041wlist_add (WL *head, WL elem)
824{ 2042{
825 elem->next = *head; 2043 elem->next = *head;
826 *head = elem; 2044 *head = elem;
827} 2045}
828 2046
829static void 2047void inline_size
830wlist_del (WL *head, WL elem) 2048wlist_del (WL *head, WL elem)
831{ 2049{
832 while (*head) 2050 while (*head)
833 { 2051 {
834 if (*head == elem) 2052 if (*head == elem)
… …
839 2057
840 head = &(*head)->next; 2058 head = &(*head)->next;
841 } 2059 }
842} 2060}
843 2061
844static void 2062void inline_speed
845ev_clear_pending (W w) 2063clear_pending (EV_P_ W w)
846{ 2064{
847 if (w->pending) 2065 if (w->pending)
848 { 2066 {
849 pendings [w->pending - 1].w = 0; 2067 pendings [ABSPRI (w)][w->pending - 1].w = 0;
850 w->pending = 0; 2068 w->pending = 0;
851 } 2069 }
852} 2070}
853 2071
854static void 2072int
2073ev_clear_pending (EV_P_ void *w)
2074{
2075 W w_ = (W)w;
2076 int pending = w_->pending;
2077
2078 if (expect_true (pending))
2079 {
2080 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2081 w_->pending = 0;
2082 p->w = 0;
2083 return p->events;
2084 }
2085 else
2086 return 0;
2087}
2088
2089void inline_size
2090pri_adjust (EV_P_ W w)
2091{
2092 int pri = w->priority;
2093 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2094 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2095 w->priority = pri;
2096}
2097
2098void inline_speed
855ev_start (W w, int active) 2099ev_start (EV_P_ W w, int active)
856{ 2100{
2101 pri_adjust (EV_A_ w);
857 w->active = active; 2102 w->active = active;
2103 ev_ref (EV_A);
858} 2104}
859 2105
860static void 2106void inline_size
861ev_stop (W w) 2107ev_stop (EV_P_ W w)
862{ 2108{
2109 ev_unref (EV_A);
863 w->active = 0; 2110 w->active = 0;
864} 2111}
865 2112
866/*****************************************************************************/ 2113/*****************************************************************************/
867 2114
868void 2115void noinline
869ev_io_start (struct ev_io *w) 2116ev_io_start (EV_P_ ev_io *w)
870{ 2117{
871 int fd = w->fd; 2118 int fd = w->fd;
872 2119
873 if (ev_is_active (w)) 2120 if (expect_false (ev_is_active (w)))
874 return; 2121 return;
875 2122
876 assert (("ev_io_start called with negative fd", fd >= 0)); 2123 assert (("ev_io_start called with negative fd", fd >= 0));
2124 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
877 2125
2126 EV_FREQUENT_CHECK;
2127
878 ev_start ((W)w, 1); 2128 ev_start (EV_A_ (W)w, 1);
879 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2129 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
880 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2130 wlist_add (&anfds[fd].head, (WL)w);
881 2131
882 fd_change (fd); 2132 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
883} 2133 w->events &= ~EV_IOFDSET;
884 2134
885void 2135 EV_FREQUENT_CHECK;
2136}
2137
2138void noinline
886ev_io_stop (struct ev_io *w) 2139ev_io_stop (EV_P_ ev_io *w)
887{ 2140{
888 ev_clear_pending ((W)w); 2141 clear_pending (EV_A_ (W)w);
889 if (!ev_is_active (w)) 2142 if (expect_false (!ev_is_active (w)))
890 return; 2143 return;
891 2144
2145 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2146
2147 EV_FREQUENT_CHECK;
2148
892 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2149 wlist_del (&anfds[w->fd].head, (WL)w);
893 ev_stop ((W)w); 2150 ev_stop (EV_A_ (W)w);
894 2151
895 fd_change (w->fd); 2152 fd_change (EV_A_ w->fd, 1);
896}
897 2153
898void 2154 EV_FREQUENT_CHECK;
2155}
2156
2157void noinline
899ev_timer_start (struct ev_timer *w) 2158ev_timer_start (EV_P_ ev_timer *w)
900{ 2159{
901 if (ev_is_active (w)) 2160 if (expect_false (ev_is_active (w)))
902 return; 2161 return;
903 2162
904 w->at += now; 2163 ev_at (w) += mn_now;
905 2164
906 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2165 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
907 2166
908 ev_start ((W)w, ++timercnt); 2167 EV_FREQUENT_CHECK;
909 array_needsize (timers, timermax, timercnt, );
910 timers [timercnt - 1] = w;
911 upheap ((WT *)timers, timercnt - 1);
912}
913 2168
914void 2169 ++timercnt;
2170 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2171 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2172 ANHE_w (timers [ev_active (w)]) = (WT)w;
2173 ANHE_at_cache (timers [ev_active (w)]);
2174 upheap (timers, ev_active (w));
2175
2176 EV_FREQUENT_CHECK;
2177
2178 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2179}
2180
2181void noinline
915ev_timer_stop (struct ev_timer *w) 2182ev_timer_stop (EV_P_ ev_timer *w)
916{ 2183{
917 ev_clear_pending ((W)w); 2184 clear_pending (EV_A_ (W)w);
918 if (!ev_is_active (w)) 2185 if (expect_false (!ev_is_active (w)))
919 return; 2186 return;
920 2187
921 if (w->active < timercnt--) 2188 EV_FREQUENT_CHECK;
2189
2190 {
2191 int active = ev_active (w);
2192
2193 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2194
2195 --timercnt;
2196
2197 if (expect_true (active < timercnt + HEAP0))
922 { 2198 {
923 timers [w->active - 1] = timers [timercnt]; 2199 timers [active] = timers [timercnt + HEAP0];
924 downheap ((WT *)timers, timercnt, w->active - 1); 2200 adjustheap (timers, timercnt, active);
925 } 2201 }
2202 }
926 2203
927 w->at = w->repeat; 2204 EV_FREQUENT_CHECK;
928 2205
2206 ev_at (w) -= mn_now;
2207
929 ev_stop ((W)w); 2208 ev_stop (EV_A_ (W)w);
930} 2209}
931 2210
932void 2211void noinline
933ev_timer_again (struct ev_timer *w) 2212ev_timer_again (EV_P_ ev_timer *w)
934{ 2213{
2214 EV_FREQUENT_CHECK;
2215
935 if (ev_is_active (w)) 2216 if (ev_is_active (w))
936 { 2217 {
937 if (w->repeat) 2218 if (w->repeat)
938 { 2219 {
939 w->at = now + w->repeat; 2220 ev_at (w) = mn_now + w->repeat;
2221 ANHE_at_cache (timers [ev_active (w)]);
940 downheap ((WT *)timers, timercnt, w->active - 1); 2222 adjustheap (timers, timercnt, ev_active (w));
941 } 2223 }
942 else 2224 else
943 ev_timer_stop (w); 2225 ev_timer_stop (EV_A_ w);
944 } 2226 }
945 else if (w->repeat) 2227 else if (w->repeat)
2228 {
2229 ev_at (w) = w->repeat;
946 ev_timer_start (w); 2230 ev_timer_start (EV_A_ w);
947} 2231 }
948 2232
949void 2233 EV_FREQUENT_CHECK;
2234}
2235
2236#if EV_PERIODIC_ENABLE
2237void noinline
950ev_periodic_start (struct ev_periodic *w) 2238ev_periodic_start (EV_P_ ev_periodic *w)
951{ 2239{
952 if (ev_is_active (w)) 2240 if (expect_false (ev_is_active (w)))
953 return; 2241 return;
954 2242
2243 if (w->reschedule_cb)
2244 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2245 else if (w->interval)
2246 {
955 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2247 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
956
957 /* this formula differs from the one in periodic_reify because we do not always round up */ 2248 /* this formula differs from the one in periodic_reify because we do not always round up */
958 if (w->interval)
959 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2249 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2250 }
2251 else
2252 ev_at (w) = w->offset;
960 2253
2254 EV_FREQUENT_CHECK;
2255
2256 ++periodiccnt;
961 ev_start ((W)w, ++periodiccnt); 2257 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
962 array_needsize (periodics, periodicmax, periodiccnt, ); 2258 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
963 periodics [periodiccnt - 1] = w; 2259 ANHE_w (periodics [ev_active (w)]) = (WT)w;
964 upheap ((WT *)periodics, periodiccnt - 1); 2260 ANHE_at_cache (periodics [ev_active (w)]);
965} 2261 upheap (periodics, ev_active (w));
966 2262
967void 2263 EV_FREQUENT_CHECK;
2264
2265 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2266}
2267
2268void noinline
968ev_periodic_stop (struct ev_periodic *w) 2269ev_periodic_stop (EV_P_ ev_periodic *w)
969{ 2270{
970 ev_clear_pending ((W)w); 2271 clear_pending (EV_A_ (W)w);
971 if (!ev_is_active (w)) 2272 if (expect_false (!ev_is_active (w)))
972 return; 2273 return;
973 2274
974 if (w->active < periodiccnt--) 2275 EV_FREQUENT_CHECK;
2276
2277 {
2278 int active = ev_active (w);
2279
2280 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2281
2282 --periodiccnt;
2283
2284 if (expect_true (active < periodiccnt + HEAP0))
975 { 2285 {
976 periodics [w->active - 1] = periodics [periodiccnt]; 2286 periodics [active] = periodics [periodiccnt + HEAP0];
977 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2287 adjustheap (periodics, periodiccnt, active);
978 } 2288 }
2289 }
979 2290
2291 EV_FREQUENT_CHECK;
2292
980 ev_stop ((W)w); 2293 ev_stop (EV_A_ (W)w);
981} 2294}
982 2295
983void 2296void noinline
2297ev_periodic_again (EV_P_ ev_periodic *w)
2298{
2299 /* TODO: use adjustheap and recalculation */
2300 ev_periodic_stop (EV_A_ w);
2301 ev_periodic_start (EV_A_ w);
2302}
2303#endif
2304
2305#ifndef SA_RESTART
2306# define SA_RESTART 0
2307#endif
2308
2309void noinline
984ev_signal_start (struct ev_signal *w) 2310ev_signal_start (EV_P_ ev_signal *w)
985{ 2311{
2312#if EV_MULTIPLICITY
2313 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2314#endif
986 if (ev_is_active (w)) 2315 if (expect_false (ev_is_active (w)))
987 return; 2316 return;
988 2317
989 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2318 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
990 2319
2320 evpipe_init (EV_A);
2321
2322 EV_FREQUENT_CHECK;
2323
2324 {
2325#ifndef _WIN32
2326 sigset_t full, prev;
2327 sigfillset (&full);
2328 sigprocmask (SIG_SETMASK, &full, &prev);
2329#endif
2330
2331 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2332
2333#ifndef _WIN32
2334 sigprocmask (SIG_SETMASK, &prev, 0);
2335#endif
2336 }
2337
991 ev_start ((W)w, 1); 2338 ev_start (EV_A_ (W)w, 1);
992 array_needsize (signals, signalmax, w->signum, signals_init);
993 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2339 wlist_add (&signals [w->signum - 1].head, (WL)w);
994 2340
995 if (!w->next) 2341 if (!((WL)w)->next)
996 { 2342 {
2343#if _WIN32
2344 signal (w->signum, ev_sighandler);
2345#else
997 struct sigaction sa; 2346 struct sigaction sa;
998 sa.sa_handler = sighandler; 2347 sa.sa_handler = ev_sighandler;
999 sigfillset (&sa.sa_mask); 2348 sigfillset (&sa.sa_mask);
1000 sa.sa_flags = 0; 2349 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1001 sigaction (w->signum, &sa, 0); 2350 sigaction (w->signum, &sa, 0);
2351#endif
1002 } 2352 }
1003}
1004 2353
1005void 2354 EV_FREQUENT_CHECK;
2355}
2356
2357void noinline
1006ev_signal_stop (struct ev_signal *w) 2358ev_signal_stop (EV_P_ ev_signal *w)
1007{ 2359{
1008 ev_clear_pending ((W)w); 2360 clear_pending (EV_A_ (W)w);
1009 if (!ev_is_active (w)) 2361 if (expect_false (!ev_is_active (w)))
1010 return; 2362 return;
1011 2363
2364 EV_FREQUENT_CHECK;
2365
1012 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2366 wlist_del (&signals [w->signum - 1].head, (WL)w);
1013 ev_stop ((W)w); 2367 ev_stop (EV_A_ (W)w);
1014 2368
1015 if (!signals [w->signum - 1].head) 2369 if (!signals [w->signum - 1].head)
1016 signal (w->signum, SIG_DFL); 2370 signal (w->signum, SIG_DFL);
1017}
1018 2371
2372 EV_FREQUENT_CHECK;
2373}
2374
1019void 2375void
1020ev_idle_start (struct ev_idle *w) 2376ev_child_start (EV_P_ ev_child *w)
1021{ 2377{
2378#if EV_MULTIPLICITY
2379 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2380#endif
1022 if (ev_is_active (w)) 2381 if (expect_false (ev_is_active (w)))
1023 return; 2382 return;
1024 2383
1025 ev_start ((W)w, ++idlecnt); 2384 EV_FREQUENT_CHECK;
1026 array_needsize (idles, idlemax, idlecnt, );
1027 idles [idlecnt - 1] = w;
1028}
1029 2385
2386 ev_start (EV_A_ (W)w, 1);
2387 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2388
2389 EV_FREQUENT_CHECK;
2390}
2391
1030void 2392void
1031ev_idle_stop (struct ev_idle *w) 2393ev_child_stop (EV_P_ ev_child *w)
1032{ 2394{
1033 ev_clear_pending ((W)w); 2395 clear_pending (EV_A_ (W)w);
1034 if (ev_is_active (w)) 2396 if (expect_false (!ev_is_active (w)))
1035 return; 2397 return;
1036 2398
1037 idles [w->active - 1] = idles [--idlecnt]; 2399 EV_FREQUENT_CHECK;
2400
2401 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1038 ev_stop ((W)w); 2402 ev_stop (EV_A_ (W)w);
1039}
1040 2403
1041void 2404 EV_FREQUENT_CHECK;
1042ev_prepare_start (struct ev_prepare *w) 2405}
2406
2407#if EV_STAT_ENABLE
2408
2409# ifdef _WIN32
2410# undef lstat
2411# define lstat(a,b) _stati64 (a,b)
2412# endif
2413
2414#define DEF_STAT_INTERVAL 5.0074891
2415#define MIN_STAT_INTERVAL 0.1074891
2416
2417static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2418
2419#if EV_USE_INOTIFY
2420# define EV_INOTIFY_BUFSIZE 8192
2421
2422static void noinline
2423infy_add (EV_P_ ev_stat *w)
1043{ 2424{
1044 if (ev_is_active (w)) 2425 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);
2426
2427 if (w->wd < 0)
2428 {
2429 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2430
2431 /* monitor some parent directory for speedup hints */
2432 /* note that exceeding the hardcoded limit is not a correctness issue, */
2433 /* but an efficiency issue only */
2434 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2435 {
2436 char path [4096];
2437 strcpy (path, w->path);
2438
2439 do
2440 {
2441 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2442 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2443
2444 char *pend = strrchr (path, '/');
2445
2446 if (!pend)
2447 break; /* whoops, no '/', complain to your admin */
2448
2449 *pend = 0;
2450 w->wd = inotify_add_watch (fs_fd, path, mask);
2451 }
2452 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2453 }
2454 }
2455 else
2456 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2457
2458 if (w->wd >= 0)
2459 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2460}
2461
2462static void noinline
2463infy_del (EV_P_ ev_stat *w)
2464{
2465 int slot;
2466 int wd = w->wd;
2467
2468 if (wd < 0)
1045 return; 2469 return;
1046 2470
2471 w->wd = -2;
2472 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2473 wlist_del (&fs_hash [slot].head, (WL)w);
2474
2475 /* remove this watcher, if others are watching it, they will rearm */
2476 inotify_rm_watch (fs_fd, wd);
2477}
2478
2479static void noinline
2480infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2481{
2482 if (slot < 0)
2483 /* overflow, need to check for all hash slots */
2484 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2485 infy_wd (EV_A_ slot, wd, ev);
2486 else
2487 {
2488 WL w_;
2489
2490 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2491 {
2492 ev_stat *w = (ev_stat *)w_;
2493 w_ = w_->next; /* lets us remove this watcher and all before it */
2494
2495 if (w->wd == wd || wd == -1)
2496 {
2497 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2498 {
2499 w->wd = -1;
2500 infy_add (EV_A_ w); /* re-add, no matter what */
2501 }
2502
2503 stat_timer_cb (EV_A_ &w->timer, 0);
2504 }
2505 }
2506 }
2507}
2508
2509static void
2510infy_cb (EV_P_ ev_io *w, int revents)
2511{
2512 char buf [EV_INOTIFY_BUFSIZE];
2513 struct inotify_event *ev = (struct inotify_event *)buf;
2514 int ofs;
2515 int len = read (fs_fd, buf, sizeof (buf));
2516
2517 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2518 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2519}
2520
2521void inline_size
2522infy_init (EV_P)
2523{
2524 if (fs_fd != -2)
2525 return;
2526
2527 /* kernels < 2.6.25 are borked
2528 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2529 */
2530 {
2531 struct utsname buf;
2532 int major, minor, micro;
2533
2534 fs_fd = -1;
2535
2536 if (uname (&buf))
2537 return;
2538
2539 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2540 return;
2541
2542 if (major < 2
2543 || (major == 2 && minor < 6)
2544 || (major == 2 && minor == 6 && micro < 25))
2545 return;
2546 }
2547
2548 fs_fd = inotify_init ();
2549
2550 if (fs_fd >= 0)
2551 {
2552 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2553 ev_set_priority (&fs_w, EV_MAXPRI);
2554 ev_io_start (EV_A_ &fs_w);
2555 }
2556}
2557
2558void inline_size
2559infy_fork (EV_P)
2560{
2561 int slot;
2562
2563 if (fs_fd < 0)
2564 return;
2565
2566 close (fs_fd);
2567 fs_fd = inotify_init ();
2568
2569 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2570 {
2571 WL w_ = fs_hash [slot].head;
2572 fs_hash [slot].head = 0;
2573
2574 while (w_)
2575 {
2576 ev_stat *w = (ev_stat *)w_;
2577 w_ = w_->next; /* lets us add this watcher */
2578
2579 w->wd = -1;
2580
2581 if (fs_fd >= 0)
2582 infy_add (EV_A_ w); /* re-add, no matter what */
2583 else
2584 ev_timer_start (EV_A_ &w->timer);
2585 }
2586 }
2587}
2588
2589#endif
2590
2591#ifdef _WIN32
2592# define EV_LSTAT(p,b) _stati64 (p, b)
2593#else
2594# define EV_LSTAT(p,b) lstat (p, b)
2595#endif
2596
2597void
2598ev_stat_stat (EV_P_ ev_stat *w)
2599{
2600 if (lstat (w->path, &w->attr) < 0)
2601 w->attr.st_nlink = 0;
2602 else if (!w->attr.st_nlink)
2603 w->attr.st_nlink = 1;
2604}
2605
2606static void noinline
2607stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2608{
2609 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2610
2611 /* we copy this here each the time so that */
2612 /* prev has the old value when the callback gets invoked */
2613 w->prev = w->attr;
2614 ev_stat_stat (EV_A_ w);
2615
2616 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2617 if (
2618 w->prev.st_dev != w->attr.st_dev
2619 || w->prev.st_ino != w->attr.st_ino
2620 || w->prev.st_mode != w->attr.st_mode
2621 || w->prev.st_nlink != w->attr.st_nlink
2622 || w->prev.st_uid != w->attr.st_uid
2623 || w->prev.st_gid != w->attr.st_gid
2624 || w->prev.st_rdev != w->attr.st_rdev
2625 || w->prev.st_size != w->attr.st_size
2626 || w->prev.st_atime != w->attr.st_atime
2627 || w->prev.st_mtime != w->attr.st_mtime
2628 || w->prev.st_ctime != w->attr.st_ctime
2629 ) {
2630 #if EV_USE_INOTIFY
2631 if (fs_fd >= 0)
2632 {
2633 infy_del (EV_A_ w);
2634 infy_add (EV_A_ w);
2635 ev_stat_stat (EV_A_ w); /* avoid race... */
2636 }
2637 #endif
2638
2639 ev_feed_event (EV_A_ w, EV_STAT);
2640 }
2641}
2642
2643void
2644ev_stat_start (EV_P_ ev_stat *w)
2645{
2646 if (expect_false (ev_is_active (w)))
2647 return;
2648
2649 /* since we use memcmp, we need to clear any padding data etc. */
2650 memset (&w->prev, 0, sizeof (ev_statdata));
2651 memset (&w->attr, 0, sizeof (ev_statdata));
2652
2653 ev_stat_stat (EV_A_ w);
2654
2655 if (w->interval < MIN_STAT_INTERVAL)
2656 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2657
2658 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2659 ev_set_priority (&w->timer, ev_priority (w));
2660
2661#if EV_USE_INOTIFY
2662 infy_init (EV_A);
2663
2664 if (fs_fd >= 0)
2665 infy_add (EV_A_ w);
2666 else
2667#endif
2668 ev_timer_start (EV_A_ &w->timer);
2669
2670 ev_start (EV_A_ (W)w, 1);
2671
2672 EV_FREQUENT_CHECK;
2673}
2674
2675void
2676ev_stat_stop (EV_P_ ev_stat *w)
2677{
2678 clear_pending (EV_A_ (W)w);
2679 if (expect_false (!ev_is_active (w)))
2680 return;
2681
2682 EV_FREQUENT_CHECK;
2683
2684#if EV_USE_INOTIFY
2685 infy_del (EV_A_ w);
2686#endif
2687 ev_timer_stop (EV_A_ &w->timer);
2688
2689 ev_stop (EV_A_ (W)w);
2690
2691 EV_FREQUENT_CHECK;
2692}
2693#endif
2694
2695#if EV_IDLE_ENABLE
2696void
2697ev_idle_start (EV_P_ ev_idle *w)
2698{
2699 if (expect_false (ev_is_active (w)))
2700 return;
2701
2702 pri_adjust (EV_A_ (W)w);
2703
2704 EV_FREQUENT_CHECK;
2705
2706 {
2707 int active = ++idlecnt [ABSPRI (w)];
2708
2709 ++idleall;
2710 ev_start (EV_A_ (W)w, active);
2711
2712 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2713 idles [ABSPRI (w)][active - 1] = w;
2714 }
2715
2716 EV_FREQUENT_CHECK;
2717}
2718
2719void
2720ev_idle_stop (EV_P_ ev_idle *w)
2721{
2722 clear_pending (EV_A_ (W)w);
2723 if (expect_false (!ev_is_active (w)))
2724 return;
2725
2726 EV_FREQUENT_CHECK;
2727
2728 {
2729 int active = ev_active (w);
2730
2731 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2732 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2733
2734 ev_stop (EV_A_ (W)w);
2735 --idleall;
2736 }
2737
2738 EV_FREQUENT_CHECK;
2739}
2740#endif
2741
2742void
2743ev_prepare_start (EV_P_ ev_prepare *w)
2744{
2745 if (expect_false (ev_is_active (w)))
2746 return;
2747
2748 EV_FREQUENT_CHECK;
2749
1047 ev_start ((W)w, ++preparecnt); 2750 ev_start (EV_A_ (W)w, ++preparecnt);
1048 array_needsize (prepares, preparemax, preparecnt, ); 2751 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1049 prepares [preparecnt - 1] = w; 2752 prepares [preparecnt - 1] = w;
1050}
1051 2753
2754 EV_FREQUENT_CHECK;
2755}
2756
1052void 2757void
1053ev_prepare_stop (struct ev_prepare *w) 2758ev_prepare_stop (EV_P_ ev_prepare *w)
1054{ 2759{
1055 ev_clear_pending ((W)w); 2760 clear_pending (EV_A_ (W)w);
1056 if (ev_is_active (w)) 2761 if (expect_false (!ev_is_active (w)))
1057 return; 2762 return;
1058 2763
2764 EV_FREQUENT_CHECK;
2765
2766 {
2767 int active = ev_active (w);
2768
1059 prepares [w->active - 1] = prepares [--preparecnt]; 2769 prepares [active - 1] = prepares [--preparecnt];
2770 ev_active (prepares [active - 1]) = active;
2771 }
2772
1060 ev_stop ((W)w); 2773 ev_stop (EV_A_ (W)w);
1061}
1062 2774
2775 EV_FREQUENT_CHECK;
2776}
2777
1063void 2778void
1064ev_check_start (struct ev_check *w) 2779ev_check_start (EV_P_ ev_check *w)
1065{ 2780{
1066 if (ev_is_active (w)) 2781 if (expect_false (ev_is_active (w)))
1067 return; 2782 return;
1068 2783
2784 EV_FREQUENT_CHECK;
2785
1069 ev_start ((W)w, ++checkcnt); 2786 ev_start (EV_A_ (W)w, ++checkcnt);
1070 array_needsize (checks, checkmax, checkcnt, ); 2787 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1071 checks [checkcnt - 1] = w; 2788 checks [checkcnt - 1] = w;
1072}
1073 2789
2790 EV_FREQUENT_CHECK;
2791}
2792
1074void 2793void
1075ev_check_stop (struct ev_check *w) 2794ev_check_stop (EV_P_ ev_check *w)
1076{ 2795{
1077 ev_clear_pending ((W)w); 2796 clear_pending (EV_A_ (W)w);
1078 if (ev_is_active (w)) 2797 if (expect_false (!ev_is_active (w)))
1079 return; 2798 return;
1080 2799
2800 EV_FREQUENT_CHECK;
2801
2802 {
2803 int active = ev_active (w);
2804
1081 checks [w->active - 1] = checks [--checkcnt]; 2805 checks [active - 1] = checks [--checkcnt];
2806 ev_active (checks [active - 1]) = active;
2807 }
2808
1082 ev_stop ((W)w); 2809 ev_stop (EV_A_ (W)w);
1083}
1084 2810
1085void 2811 EV_FREQUENT_CHECK;
1086ev_child_start (struct ev_child *w) 2812}
2813
2814#if EV_EMBED_ENABLE
2815void noinline
2816ev_embed_sweep (EV_P_ ev_embed *w)
1087{ 2817{
2818 ev_loop (w->other, EVLOOP_NONBLOCK);
2819}
2820
2821static void
2822embed_io_cb (EV_P_ ev_io *io, int revents)
2823{
2824 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2825
1088 if (ev_is_active (w)) 2826 if (ev_cb (w))
2827 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2828 else
2829 ev_loop (w->other, EVLOOP_NONBLOCK);
2830}
2831
2832static void
2833embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2834{
2835 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2836
2837 {
2838 struct ev_loop *loop = w->other;
2839
2840 while (fdchangecnt)
2841 {
2842 fd_reify (EV_A);
2843 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2844 }
2845 }
2846}
2847
2848static void
2849embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2850{
2851 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2852
2853 {
2854 struct ev_loop *loop = w->other;
2855
2856 ev_loop_fork (EV_A);
2857 }
2858}
2859
2860#if 0
2861static void
2862embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2863{
2864 ev_idle_stop (EV_A_ idle);
2865}
2866#endif
2867
2868void
2869ev_embed_start (EV_P_ ev_embed *w)
2870{
2871 if (expect_false (ev_is_active (w)))
1089 return; 2872 return;
1090 2873
2874 {
2875 struct ev_loop *loop = w->other;
2876 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2877 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2878 }
2879
2880 EV_FREQUENT_CHECK;
2881
2882 ev_set_priority (&w->io, ev_priority (w));
2883 ev_io_start (EV_A_ &w->io);
2884
2885 ev_prepare_init (&w->prepare, embed_prepare_cb);
2886 ev_set_priority (&w->prepare, EV_MINPRI);
2887 ev_prepare_start (EV_A_ &w->prepare);
2888
2889 ev_fork_init (&w->fork, embed_fork_cb);
2890 ev_fork_start (EV_A_ &w->fork);
2891
2892 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2893
1091 ev_start ((W)w, 1); 2894 ev_start (EV_A_ (W)w, 1);
1092 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1093}
1094 2895
2896 EV_FREQUENT_CHECK;
2897}
2898
1095void 2899void
1096ev_child_stop (struct ev_child *w) 2900ev_embed_stop (EV_P_ ev_embed *w)
1097{ 2901{
1098 ev_clear_pending ((W)w); 2902 clear_pending (EV_A_ (W)w);
1099 if (ev_is_active (w)) 2903 if (expect_false (!ev_is_active (w)))
1100 return; 2904 return;
1101 2905
1102 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2906 EV_FREQUENT_CHECK;
2907
2908 ev_io_stop (EV_A_ &w->io);
2909 ev_prepare_stop (EV_A_ &w->prepare);
2910 ev_fork_stop (EV_A_ &w->fork);
2911
2912 EV_FREQUENT_CHECK;
2913}
2914#endif
2915
2916#if EV_FORK_ENABLE
2917void
2918ev_fork_start (EV_P_ ev_fork *w)
2919{
2920 if (expect_false (ev_is_active (w)))
2921 return;
2922
2923 EV_FREQUENT_CHECK;
2924
2925 ev_start (EV_A_ (W)w, ++forkcnt);
2926 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2927 forks [forkcnt - 1] = w;
2928
2929 EV_FREQUENT_CHECK;
2930}
2931
2932void
2933ev_fork_stop (EV_P_ ev_fork *w)
2934{
2935 clear_pending (EV_A_ (W)w);
2936 if (expect_false (!ev_is_active (w)))
2937 return;
2938
2939 EV_FREQUENT_CHECK;
2940
2941 {
2942 int active = ev_active (w);
2943
2944 forks [active - 1] = forks [--forkcnt];
2945 ev_active (forks [active - 1]) = active;
2946 }
2947
1103 ev_stop ((W)w); 2948 ev_stop (EV_A_ (W)w);
2949
2950 EV_FREQUENT_CHECK;
1104} 2951}
2952#endif
2953
2954#if EV_ASYNC_ENABLE
2955void
2956ev_async_start (EV_P_ ev_async *w)
2957{
2958 if (expect_false (ev_is_active (w)))
2959 return;
2960
2961 evpipe_init (EV_A);
2962
2963 EV_FREQUENT_CHECK;
2964
2965 ev_start (EV_A_ (W)w, ++asynccnt);
2966 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2967 asyncs [asynccnt - 1] = w;
2968
2969 EV_FREQUENT_CHECK;
2970}
2971
2972void
2973ev_async_stop (EV_P_ ev_async *w)
2974{
2975 clear_pending (EV_A_ (W)w);
2976 if (expect_false (!ev_is_active (w)))
2977 return;
2978
2979 EV_FREQUENT_CHECK;
2980
2981 {
2982 int active = ev_active (w);
2983
2984 asyncs [active - 1] = asyncs [--asynccnt];
2985 ev_active (asyncs [active - 1]) = active;
2986 }
2987
2988 ev_stop (EV_A_ (W)w);
2989
2990 EV_FREQUENT_CHECK;
2991}
2992
2993void
2994ev_async_send (EV_P_ ev_async *w)
2995{
2996 w->sent = 1;
2997 evpipe_write (EV_A_ &gotasync);
2998}
2999#endif
1105 3000
1106/*****************************************************************************/ 3001/*****************************************************************************/
1107 3002
1108struct ev_once 3003struct ev_once
1109{ 3004{
1110 struct ev_io io; 3005 ev_io io;
1111 struct ev_timer to; 3006 ev_timer to;
1112 void (*cb)(int revents, void *arg); 3007 void (*cb)(int revents, void *arg);
1113 void *arg; 3008 void *arg;
1114}; 3009};
1115 3010
1116static void 3011static void
1117once_cb (struct ev_once *once, int revents) 3012once_cb (EV_P_ struct ev_once *once, int revents)
1118{ 3013{
1119 void (*cb)(int revents, void *arg) = once->cb; 3014 void (*cb)(int revents, void *arg) = once->cb;
1120 void *arg = once->arg; 3015 void *arg = once->arg;
1121 3016
1122 ev_io_stop (&once->io); 3017 ev_io_stop (EV_A_ &once->io);
1123 ev_timer_stop (&once->to); 3018 ev_timer_stop (EV_A_ &once->to);
1124 free (once); 3019 ev_free (once);
1125 3020
1126 cb (revents, arg); 3021 cb (revents, arg);
1127} 3022}
1128 3023
1129static void 3024static void
1130once_cb_io (struct ev_io *w, int revents) 3025once_cb_io (EV_P_ ev_io *w, int revents)
1131{ 3026{
1132 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3027 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3028
3029 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1133} 3030}
1134 3031
1135static void 3032static void
1136once_cb_to (struct ev_timer *w, int revents) 3033once_cb_to (EV_P_ ev_timer *w, int revents)
1137{ 3034{
1138 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3035 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1139}
1140 3036
3037 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3038}
3039
1141void 3040void
1142ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3041ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1143{ 3042{
1144 struct ev_once *once = malloc (sizeof (struct ev_once)); 3043 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1145 3044
1146 if (!once) 3045 if (expect_false (!once))
3046 {
1147 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3047 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1148 else 3048 return;
1149 { 3049 }
3050
1150 once->cb = cb; 3051 once->cb = cb;
1151 once->arg = arg; 3052 once->arg = arg;
1152 3053
1153 ev_watcher_init (&once->io, once_cb_io); 3054 ev_init (&once->io, once_cb_io);
1154 if (fd >= 0) 3055 if (fd >= 0)
1155 { 3056 {
1156 ev_io_set (&once->io, fd, events); 3057 ev_io_set (&once->io, fd, events);
1157 ev_io_start (&once->io); 3058 ev_io_start (EV_A_ &once->io);
1158 } 3059 }
1159 3060
1160 ev_watcher_init (&once->to, once_cb_to); 3061 ev_init (&once->to, once_cb_to);
1161 if (timeout >= 0.) 3062 if (timeout >= 0.)
1162 { 3063 {
1163 ev_timer_set (&once->to, timeout, 0.); 3064 ev_timer_set (&once->to, timeout, 0.);
1164 ev_timer_start (&once->to); 3065 ev_timer_start (EV_A_ &once->to);
1165 }
1166 }
1167}
1168
1169/*****************************************************************************/
1170
1171#if 0
1172
1173struct ev_io wio;
1174
1175static void
1176sin_cb (struct ev_io *w, int revents)
1177{
1178 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1179}
1180
1181static void
1182ocb (struct ev_timer *w, int revents)
1183{
1184 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1185 ev_timer_stop (w);
1186 ev_timer_start (w);
1187}
1188
1189static void
1190scb (struct ev_signal *w, int revents)
1191{
1192 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1193 ev_io_stop (&wio);
1194 ev_io_start (&wio);
1195}
1196
1197static void
1198gcb (struct ev_signal *w, int revents)
1199{
1200 fprintf (stderr, "generic %x\n", revents);
1201
1202}
1203
1204int main (void)
1205{
1206 ev_init (0);
1207
1208 ev_io_init (&wio, sin_cb, 0, EV_READ);
1209 ev_io_start (&wio);
1210
1211 struct ev_timer t[10000];
1212
1213#if 0
1214 int i;
1215 for (i = 0; i < 10000; ++i)
1216 { 3066 }
1217 struct ev_timer *w = t + i;
1218 ev_watcher_init (w, ocb, i);
1219 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1220 ev_timer_start (w);
1221 if (drand48 () < 0.5)
1222 ev_timer_stop (w);
1223 }
1224#endif
1225
1226 struct ev_timer t1;
1227 ev_timer_init (&t1, ocb, 5, 10);
1228 ev_timer_start (&t1);
1229
1230 struct ev_signal sig;
1231 ev_signal_init (&sig, scb, SIGQUIT);
1232 ev_signal_start (&sig);
1233
1234 struct ev_check cw;
1235 ev_check_init (&cw, gcb);
1236 ev_check_start (&cw);
1237
1238 struct ev_idle iw;
1239 ev_idle_init (&iw, gcb);
1240 ev_idle_start (&iw);
1241
1242 ev_loop (0);
1243
1244 return 0;
1245} 3067}
1246 3068
3069#if EV_MULTIPLICITY
3070 #include "ev_wrap.h"
1247#endif 3071#endif
1248 3072
3073#ifdef __cplusplus
3074}
3075#endif
1249 3076
1250
1251

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