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Comparing libev/ev.c (file contents):
Revision 1.46 by root, Sat Nov 3 09:20:12 2007 UTC vs.
Revision 1.266 by root, Fri Oct 24 08:15:33 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>
144#include <time.h>
145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
47#ifndef WIN32 154#ifndef _WIN32
155# include <sys/time.h>
48# include <sys/wait.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
49#endif 164# endif
50#include <sys/time.h> 165#endif
51#include <time.h>
52 166
53/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
54 168
55#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
56# 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
57#endif 187#endif
58 188
59#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
61#endif 191#endif
62 192
63#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
64# 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
65#endif 199#endif
66 200
67#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
68# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
69#endif 207#endif
70 208
71#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
73#endif 211#endif
74 212
75#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))
76# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
77#endif 222# endif
223#endif
78 224
79/**/ 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 */
80 268
81#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
84#endif 272#endif
… …
86#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
89#endif 277#endif
90 278
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
91/**/ 316/**/
92 317
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
93#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) */
94#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) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#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 */
97 337
98#include "ev.h"
99
100#if __GNUC__ >= 3 338#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 340# define noinline __attribute__ ((noinline))
103#else 341#else
104# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
105# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
106#endif 347#endif
107 348
108#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
110 358
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 361
362#define EMPTY /* required for microsofts broken pseudo-c compiler */
363#define EMPTY2(a,b) /* used to suppress some warnings */
364
114typedef struct ev_watcher *W; 365typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
117 368
118static 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
119ev_tstamp ev_now; 510 ev_tstamp ev_rt_now;
120int ev_method; 511 #define VAR(name,decl) static decl;
512 #include "ev_vars.h"
513 #undef VAR
121 514
122static int have_monotonic; /* runtime */ 515 static int ev_default_loop_ptr;
123 516
124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 517#endif
125static void (*method_modify)(int fd, int oev, int nev);
126static void (*method_poll)(ev_tstamp timeout);
127 518
128/*****************************************************************************/ 519/*****************************************************************************/
129 520
130ev_tstamp 521ev_tstamp
131ev_time (void) 522ev_time (void)
… …
139 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
140 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
141#endif 532#endif
142} 533}
143 534
144static ev_tstamp 535ev_tstamp inline_size
145get_clock (void) 536get_clock (void)
146{ 537{
147#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
148 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
149 { 540 {
… …
154#endif 545#endif
155 546
156 return ev_time (); 547 return ev_time ();
157} 548}
158 549
159#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
160 557
161#define array_needsize(base,cur,cnt,init) \ 558void
162 if (expect_false ((cnt) > cur)) \ 559ev_sleep (ev_tstamp delay)
163 { \ 560{
164 int newcnt = cur; \ 561 if (delay > 0.)
165 do \
166 { \
167 newcnt = array_roundsize (base, newcnt << 1); \
168 } \
169 while ((cnt) > newcnt); \
170 \
171 base = realloc (base, sizeof (*base) * (newcnt)); \
172 init (base + cur, newcnt - cur); \
173 cur = newcnt; \
174 } 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}
175 585
176/*****************************************************************************/ 586/*****************************************************************************/
177 587
178typedef struct 588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179{
180 struct ev_io *head;
181 unsigned char events;
182 unsigned char reify;
183} ANFD;
184 589
185static ANFD *anfds; 590int inline_size
186static int anfdmax; 591array_nextsize (int elem, int cur, int cnt)
187
188static void
189anfds_init (ANFD *base, int count)
190{ 592{
191 while (count--) 593 int ncur = cur + 1;
192 {
193 base->head = 0;
194 base->events = EV_NONE;
195 base->reify = 0;
196 594
197 ++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)
198 } 601 {
199} 602 ncur *= elem;
200 603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
201typedef struct 604 ncur = ncur - sizeof (void *) * 4;
202{ 605 ncur /= elem;
203 W w;
204 int events;
205} ANPENDING;
206
207static ANPENDING *pendings [NUMPRI];
208static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210static void
211event (W w, int events)
212{
213 if (w->pending)
214 { 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_;
215 pendings [ABSPRI (w)][w->pending - 1].events |= events; 658 pendings [pri][w_->pending - 1].events = revents;
216 return;
217 } 659 }
218
219 w->pending = ++pendingcnt [ABSPRI (w)];
220 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221 pendings [ABSPRI (w)][w->pending - 1].w = w;
222 pendings [ABSPRI (w)][w->pending - 1].events = events;
223} 660}
224 661
225static void 662void inline_speed
226queue_events (W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
227{ 664{
228 int i; 665 int i;
229 666
230 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
231 event (events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
232} 669}
233 670
234static void 671/*****************************************************************************/
672
673void inline_speed
235fd_event (int fd, int events) 674fd_event (EV_P_ int fd, int revents)
236{ 675{
237 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
238 struct ev_io *w; 677 ev_io *w;
239 678
240 for (w = anfd->head; w; w = w->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241 { 680 {
242 int ev = w->events & events; 681 int ev = w->events & revents;
243 682
244 if (ev) 683 if (ev)
245 event ((W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
246 } 685 }
247} 686}
248 687
249/*****************************************************************************/ 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}
250 694
251static int *fdchanges; 695void inline_size
252static int fdchangemax, fdchangecnt; 696fd_reify (EV_P)
253
254static void
255fd_reify (void)
256{ 697{
257 int i; 698 int i;
258 699
259 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
260 { 701 {
261 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
262 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
263 struct ev_io *w; 704 ev_io *w;
264 705
265 int events = 0; 706 unsigned char events = 0;
266 707
267 for (w = anfd->head; w; w = w->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268 events |= w->events; 709 events |= (unsigned char)w->events;
269 710
270 anfd->reify = 0; 711#if EV_SELECT_IS_WINSOCKET
271 712 if (events)
272 if (anfd->events != events)
273 { 713 {
274 method_modify (fd, anfd->events, events); 714 unsigned long arg;
275 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));
276 } 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 }
277 } 734 }
278 735
279 fdchangecnt = 0; 736 fdchangecnt = 0;
280} 737}
281 738
282static void 739void inline_size
283fd_change (int fd) 740fd_change (EV_P_ int fd, int flags)
284{ 741{
285 if (anfds [fd].reify || fdchangecnt < 0) 742 unsigned char reify = anfds [fd].reify;
286 return;
287
288 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
289 744
745 if (expect_true (!reify))
746 {
290 ++fdchangecnt; 747 ++fdchangecnt;
291 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
293} 751}
294 752
295static void 753void inline_speed
296fd_kill (int fd) 754fd_kill (EV_P_ int fd)
297{ 755{
298 struct ev_io *w; 756 ev_io *w;
299 757
300 printf ("killing fd %d\n", fd);//D
301 while ((w = anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
302 { 759 {
303 ev_io_stop (w); 760 ev_io_stop (EV_A_ w);
304 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305 } 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
306} 773}
307 774
308/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
309static void 776static void noinline
310fd_ebadf (void) 777fd_ebadf (EV_P)
311{ 778{
312 int fd; 779 int fd;
313 780
314 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
315 if (anfds [fd].events) 782 if (anfds [fd].events)
316 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
317 fd_kill (fd); 784 fd_kill (EV_A_ fd);
318} 785}
319 786
320/* 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 */
321static void 788static void noinline
322fd_enomem (void) 789fd_enomem (EV_P)
323{ 790{
324 int fd = anfdmax; 791 int fd;
325 792
326 while (fd--) 793 for (fd = anfdmax; fd--; )
327 if (anfds [fd].events) 794 if (anfds [fd].events)
328 { 795 {
329 close (fd);
330 fd_kill (fd); 796 fd_kill (EV_A_ fd);
331 return; 797 return;
332 } 798 }
333} 799}
334 800
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
335/*****************************************************************************/ 815/*****************************************************************************/
336 816
337static struct ev_timer **timers; 817/*
338static 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 */
339 822
340static struct ev_periodic **periodics; 823/*
341static 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
342 830
343static void 831#define DHEAP 4
344upheap (WT *timers, int k) 832#define HEAP0 (DHEAP - 1) /* index of first element in heap */
345{ 833#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
346 WT w = timers [k]; 834#define UPHEAP_DONE(p,k) ((p) == (k))
347 835
348 while (k && timers [k >> 1]->at > w->at) 836/* away from the root */
349 { 837void inline_speed
350 timers [k] = timers [k >> 1];
351 timers [k]->active = k + 1;
352 k >>= 1;
353 }
354
355 timers [k] = w;
356 timers [k]->active = k + 1;
357
358}
359
360static void
361downheap (WT *timers, int N, int k) 838downheap (ANHE *heap, int N, int k)
362{ 839{
363 WT w = timers [k]; 840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
364 842
365 while (k < (N >> 1)) 843 for (;;)
366 { 844 {
367 int j = k << 1; 845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
368 848
369 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
370 ++j; 851 {
371 852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
372 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
373 break; 865 break;
374 866
375 timers [k] = timers [j]; 867 if (ANHE_at (he) <= minat)
376 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
377 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 (;;)
378 } 923 {
924 int p = HPARENT (k);
379 925
380 timers [k] = w; 926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
381 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);
382} 957}
383 958
384/*****************************************************************************/ 959/*****************************************************************************/
385 960
386typedef struct 961typedef struct
387{ 962{
388 struct ev_signal *head; 963 WL head;
389 sig_atomic_t volatile gotsig; 964 EV_ATOMIC_T gotsig;
390} ANSIG; 965} ANSIG;
391 966
392static ANSIG *signals; 967static ANSIG *signals;
393static int signalmax; 968static int signalmax;
394 969
395static int sigpipe [2]; 970static EV_ATOMIC_T gotsig;
396static sig_atomic_t volatile gotsig; 971
397static 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}
398 1036
399static void 1037static void
400signals_init (ANSIG *base, int count) 1038pipecb (EV_P_ ev_io *iow, int revents)
401{ 1039{
402 while (count--) 1040#if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
403 { 1045 }
404 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;
405 base->gotsig = 0; 1056 gotsig = 0;
406 1057
407 ++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)
408 } 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
409} 1077}
1078
1079/*****************************************************************************/
410 1080
411static void 1081static void
412sighandler (int signum) 1082ev_sighandler (int signum)
413{ 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
414 signals [signum - 1].gotsig = 1; 1092 signals [signum - 1].gotsig = 1;
415 1093 evpipe_write (EV_A_ &gotsig);
416 if (!gotsig)
417 {
418 gotsig = 1;
419 write (sigpipe [1], &signum, 1);
420 }
421} 1094}
422 1095
423static void 1096void noinline
424sigcb (struct ev_io *iow, int revents) 1097ev_feed_signal_event (EV_P_ int signum)
425{ 1098{
426 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
427 int signum; 1105 --signum;
428 1106
429 read (sigpipe [0], &revents, 1); 1107 if (signum < 0 || signum >= signalmax)
430 gotsig = 0; 1108 return;
431 1109
432 for (signum = signalmax; signum--; )
433 if (signals [signum].gotsig)
434 {
435 signals [signum].gotsig = 0; 1110 signals [signum].gotsig = 0;
436 1111
437 for (w = signals [signum].head; w; w = w->next) 1112 for (w = signals [signum].head; w; w = w->next)
438 event ((W)w, EV_SIGNAL); 1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
439 }
440}
441
442static void
443siginit (void)
444{
445#ifndef WIN32
446 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449 /* rather than sort out wether we really need nb, set it */
450 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452#endif
453
454 ev_io_set (&sigev, sigpipe [0], EV_READ);
455 ev_io_start (&sigev);
456} 1114}
457 1115
458/*****************************************************************************/ 1116/*****************************************************************************/
459 1117
460static struct ev_idle **idles; 1118static WL childs [EV_PID_HASHSIZE];
461static int idlemax, idlecnt;
462 1119
463static struct ev_prepare **prepares;
464static int preparemax, preparecnt;
465
466static struct ev_check **checks;
467static int checkmax, checkcnt;
468
469/*****************************************************************************/
470
471static struct ev_child *childs [PID_HASHSIZE];
472static struct ev_signal childev;
473
474#ifndef WIN32 1120#ifndef _WIN32
1121
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}
475 1146
476#ifndef WCONTINUED 1147#ifndef WCONTINUED
477# define WCONTINUED 0 1148# define WCONTINUED 0
478#endif 1149#endif
479 1150
480static void 1151static void
481childcb (struct ev_signal *sw, int revents) 1152childcb (EV_P_ ev_signal *sw, int revents)
482{ 1153{
483 struct ev_child *w;
484 int pid, status; 1154 int pid, status;
485 1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
486 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1158 if (!WCONTINUED
488 if (w->pid == pid || !w->pid) 1159 || errno != EINVAL
489 { 1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
490 w->rpid = pid; 1161 return;
491 w->rstatus = status; 1162
492 event ((W)w, EV_CHILD); 1163 /* make sure we are called again until all children have been reaped */
493 } 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 */
494} 1170}
495 1171
496#endif 1172#endif
497 1173
498/*****************************************************************************/ 1174/*****************************************************************************/
499 1175
1176#if EV_USE_PORT
1177# include "ev_port.c"
1178#endif
500#if EV_USE_KQUEUE 1179#if EV_USE_KQUEUE
501# include "ev_kqueue.c" 1180# include "ev_kqueue.c"
502#endif 1181#endif
503#if EV_USE_EPOLL 1182#if EV_USE_EPOLL
504# include "ev_epoll.c" 1183# include "ev_epoll.c"
… …
520ev_version_minor (void) 1199ev_version_minor (void)
521{ 1200{
522 return EV_VERSION_MINOR; 1201 return EV_VERSION_MINOR;
523} 1202}
524 1203
525/* 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 */
526static int 1205int inline_size
527enable_secure () 1206enable_secure (void)
528{ 1207{
1208#ifdef _WIN32
1209 return 0;
1210#else
529 return getuid () != geteuid () 1211 return getuid () != geteuid ()
530 || getgid () != getegid (); 1212 || getgid () != getegid ();
1213#endif
531} 1214}
532 1215
533int ev_init (int methods) 1216unsigned int
1217ev_supported_backends (void)
534{ 1218{
535 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)
536 { 1288 {
537#if EV_USE_MONOTONIC 1289#if EV_USE_MONOTONIC
538 { 1290 {
539 struct timespec ts; 1291 struct timespec ts;
540 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
541 have_monotonic = 1; 1293 have_monotonic = 1;
542 } 1294 }
543#endif 1295#endif
544 1296
545 ev_now = ev_time (); 1297 ev_rt_now = ev_time ();
546 now = get_clock (); 1298 mn_now = get_clock ();
547 now_floor = now; 1299 now_floor = mn_now;
548 diff = ev_now - now; 1300 rtmn_diff = ev_rt_now - mn_now;
549 1301
550 if (pipe (sigpipe)) 1302 io_blocktime = 0.;
551 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
552 1310
553 if (methods == EVMETHOD_AUTO) 1311 /* pid check not overridable via env */
554 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"))
555 methods = atoi (getenv ("LIBEV_METHODS")); 1320 flags = atoi (getenv ("LIBEV_FLAGS"));
556 else
557 methods = EVMETHOD_ANY;
558 1321
559 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
560#if EV_USE_KQUEUE 1328#if EV_USE_KQUEUE
561 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods); 1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
562#endif 1330#endif
563#if EV_USE_EPOLL 1331#if EV_USE_EPOLL
564 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); 1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
565#endif 1333#endif
566#if EV_USE_POLL 1334#if EV_USE_POLL
567 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); 1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
568#endif 1336#endif
569#if EV_USE_SELECT 1337#if EV_USE_SELECT
570 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); 1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
571#endif 1339#endif
572 1340
573 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)
574 { 1362 {
575 ev_watcher_init (&sigev, sigcb); 1363 close (evpipe [0]);
576 siginit (); 1364 close (evpipe [1]);
1365 }
1366 }
577 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 {
578#ifndef WIN32 1622#ifndef _WIN32
579 ev_signal_init (&childev, childcb, SIGCHLD); 1623 ev_signal_init (&childev, childcb, SIGCHLD);
1624 ev_set_priority (&childev, EV_MAXPRI);
580 ev_signal_start (&childev); 1625 ev_signal_start (EV_A_ &childev);
1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
581#endif 1627#endif
582 } 1628 }
1629 else
1630 ev_default_loop_ptr = 0;
583 } 1631 }
584 1632
585 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 ev_default_loop_ptr = 0;
1644
1645#ifndef _WIN32
1646 ev_ref (EV_A); /* child watcher */
1647 ev_signal_stop (EV_A_ &childev);
1648#endif
1649
1650 loop_destroy (EV_A);
1651}
1652
1653void
1654ev_default_fork (void)
1655{
1656#if EV_MULTIPLICITY
1657 struct ev_loop *loop = ev_default_loop_ptr;
1658#endif
1659
1660 if (backend)
1661 postfork = 1; /* must be in line with ev_loop_fork */
586} 1662}
587 1663
588/*****************************************************************************/ 1664/*****************************************************************************/
589 1665
590void 1666void
591ev_fork_prepare (void) 1667ev_invoke (EV_P_ void *w, int revents)
592{ 1668{
593 /* nop */ 1669 EV_CB_INVOKE ((W)w, revents);
594} 1670}
595 1671
596void 1672void inline_speed
597ev_fork_parent (void)
598{
599 /* nop */
600}
601
602void
603ev_fork_child (void)
604{
605#if EV_USE_EPOLL
606 if (ev_method == EVMETHOD_EPOLL)
607 epoll_postfork_child ();
608#endif
609
610 ev_io_stop (&sigev);
611 close (sigpipe [0]);
612 close (sigpipe [1]);
613 pipe (sigpipe);
614 siginit ();
615}
616
617/*****************************************************************************/
618
619static void
620call_pending (void) 1673call_pending (EV_P)
621{ 1674{
622 int pri; 1675 int pri;
623 1676
624 for (pri = NUMPRI; pri--; ) 1677 for (pri = NUMPRI; pri--; )
625 while (pendingcnt [pri]) 1678 while (pendingcnt [pri])
626 { 1679 {
627 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1680 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
628 1681
629 if (p->w) 1682 if (expect_true (p->w))
630 { 1683 {
1684 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1685
631 p->w->pending = 0; 1686 p->w->pending = 0;
632 p->w->cb (p->w, p->events); 1687 EV_CB_INVOKE (p->w, p->events);
1688 EV_FREQUENT_CHECK;
633 } 1689 }
634 } 1690 }
635} 1691}
636 1692
637static void 1693#if EV_IDLE_ENABLE
638timers_reify (void) 1694void inline_size
1695idle_reify (EV_P)
639{ 1696{
640 while (timercnt && timers [0]->at <= now) 1697 if (expect_false (idleall))
1698 {
1699 int pri;
1700
1701 for (pri = NUMPRI; pri--; )
1702 {
1703 if (pendingcnt [pri])
1704 break;
1705
1706 if (idlecnt [pri])
1707 {
1708 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1709 break;
1710 }
1711 }
641 { 1712 }
642 struct ev_timer *w = timers [0]; 1713}
1714#endif
1715
1716void inline_size
1717timers_reify (EV_P)
1718{
1719 EV_FREQUENT_CHECK;
1720
1721 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1722 {
1723 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1724
1725 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
643 1726
644 /* first reschedule or stop timer */ 1727 /* first reschedule or stop timer */
645 if (w->repeat) 1728 if (w->repeat)
646 { 1729 {
1730 ev_at (w) += w->repeat;
1731 if (ev_at (w) < mn_now)
1732 ev_at (w) = mn_now;
1733
647 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1734 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
648 w->at = now + w->repeat; 1735
1736 ANHE_at_cache (timers [HEAP0]);
649 downheap ((WT *)timers, timercnt, 0); 1737 downheap (timers, timercnt, HEAP0);
650 } 1738 }
651 else 1739 else
652 ev_timer_stop (w); /* nonrepeating: stop timer */ 1740 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
653 1741
1742 EV_FREQUENT_CHECK;
654 event ((W)w, EV_TIMEOUT); 1743 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
655 } 1744 }
656} 1745}
657 1746
658static void 1747#if EV_PERIODIC_ENABLE
1748void inline_size
659periodics_reify (void) 1749periodics_reify (EV_P)
660{ 1750{
1751 EV_FREQUENT_CHECK;
1752
661 while (periodiccnt && periodics [0]->at <= ev_now) 1753 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
662 { 1754 {
663 struct ev_periodic *w = periodics [0]; 1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1756
1757 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
664 1758
665 /* first reschedule or stop timer */ 1759 /* first reschedule or stop timer */
666 if (w->interval) 1760 if (w->reschedule_cb)
667 { 1761 {
668 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1762 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
669 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1763
1764 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1765
1766 ANHE_at_cache (periodics [HEAP0]);
670 downheap ((WT *)periodics, periodiccnt, 0); 1767 downheap (periodics, periodiccnt, HEAP0);
1768 }
1769 else if (w->interval)
1770 {
1771 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1772 /* if next trigger time is not sufficiently in the future, put it there */
1773 /* this might happen because of floating point inexactness */
1774 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775 {
1776 ev_at (w) += w->interval;
1777
1778 /* if interval is unreasonably low we might still have a time in the past */
1779 /* so correct this. this will make the periodic very inexact, but the user */
1780 /* has effectively asked to get triggered more often than possible */
1781 if (ev_at (w) < ev_rt_now)
1782 ev_at (w) = ev_rt_now;
1783 }
1784
1785 ANHE_at_cache (periodics [HEAP0]);
1786 downheap (periodics, periodiccnt, HEAP0);
671 } 1787 }
672 else 1788 else
673 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1789 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
674 1790
1791 EV_FREQUENT_CHECK;
675 event ((W)w, EV_PERIODIC); 1792 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
676 } 1793 }
677} 1794}
678 1795
679static void 1796static void noinline
680periodics_reschedule (ev_tstamp diff) 1797periodics_reschedule (EV_P)
681{ 1798{
682 int i; 1799 int i;
683 1800
684 /* adjust periodics after time jump */ 1801 /* adjust periodics after time jump */
685 for (i = 0; i < periodiccnt; ++i) 1802 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
686 { 1803 {
687 struct ev_periodic *w = periodics [i]; 1804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
688 1805
1806 if (w->reschedule_cb)
1807 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
689 if (w->interval) 1808 else if (w->interval)
1809 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1810
1811 ANHE_at_cache (periodics [i]);
1812 }
1813
1814 reheap (periodics, periodiccnt);
1815}
1816#endif
1817
1818void inline_speed
1819time_update (EV_P_ ev_tstamp max_block)
1820{
1821 int i;
1822
1823#if EV_USE_MONOTONIC
1824 if (expect_true (have_monotonic))
1825 {
1826 ev_tstamp odiff = rtmn_diff;
1827
1828 mn_now = get_clock ();
1829
1830 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1831 /* interpolate in the meantime */
1832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
690 { 1833 {
691 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1834 ev_rt_now = rtmn_diff + mn_now;
1835 return;
1836 }
692 1837
693 if (fabs (diff) >= 1e-4) 1838 now_floor = mn_now;
1839 ev_rt_now = ev_time ();
1840
1841 /* loop a few times, before making important decisions.
1842 * on the choice of "4": one iteration isn't enough,
1843 * in case we get preempted during the calls to
1844 * ev_time and get_clock. a second call is almost guaranteed
1845 * to succeed in that case, though. and looping a few more times
1846 * doesn't hurt either as we only do this on time-jumps or
1847 * in the unlikely event of having been preempted here.
1848 */
1849 for (i = 4; --i; )
1850 {
1851 rtmn_diff = ev_rt_now - mn_now;
1852
1853 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1854 return; /* all is well */
1855
1856 ev_rt_now = ev_time ();
1857 mn_now = get_clock ();
1858 now_floor = mn_now;
1859 }
1860
1861# if EV_PERIODIC_ENABLE
1862 periodics_reschedule (EV_A);
1863# endif
1864 /* no timer adjustment, as the monotonic clock doesn't jump */
1865 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866 }
1867 else
1868#endif
1869 {
1870 ev_rt_now = ev_time ();
1871
1872 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1873 {
1874#if EV_PERIODIC_ENABLE
1875 periodics_reschedule (EV_A);
1876#endif
1877 /* adjust timers. this is easy, as the offset is the same for all of them */
1878 for (i = 0; i < timercnt; ++i)
694 { 1879 {
695 ev_periodic_stop (w); 1880 ANHE *he = timers + i + HEAP0;
696 ev_periodic_start (w); 1881 ANHE_w (*he)->at += ev_rt_now - mn_now;
697 1882 ANHE_at_cache (*he);
698 i = 0; /* restart loop, inefficient, but time jumps should be rare */
699 } 1883 }
700 } 1884 }
701 }
702}
703 1885
704static int
705time_update_monotonic (void)
706{
707 now = get_clock ();
708
709 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
710 {
711 ev_now = now + diff;
712 return 0;
713 }
714 else
715 {
716 now_floor = now;
717 ev_now = ev_time ();
718 return 1;
719 }
720}
721
722static void
723time_update (void)
724{
725 int i;
726
727#if EV_USE_MONOTONIC
728 if (expect_true (have_monotonic))
729 {
730 if (time_update_monotonic ())
731 {
732 ev_tstamp odiff = diff;
733
734 for (i = 4; --i; ) /* loop a few times, before making important decisions */
735 {
736 diff = ev_now - now;
737
738 if (fabs (odiff - diff) < MIN_TIMEJUMP)
739 return; /* all is well */
740
741 ev_now = ev_time ();
742 now = get_clock ();
743 now_floor = now;
744 }
745
746 periodics_reschedule (diff - odiff);
747 /* no timer adjustment, as the monotonic clock doesn't jump */
748 }
749 }
750 else
751#endif
752 {
753 ev_now = ev_time ();
754
755 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
756 {
757 periodics_reschedule (ev_now - now);
758
759 /* adjust timers. this is easy, as the offset is the same for all */
760 for (i = 0; i < timercnt; ++i)
761 timers [i]->at += diff;
762 }
763
764 now = ev_now; 1886 mn_now = ev_rt_now;
765 } 1887 }
766} 1888}
767 1889
768int ev_loop_done; 1890void
1891ev_ref (EV_P)
1892{
1893 ++activecnt;
1894}
769 1895
1896void
1897ev_unref (EV_P)
1898{
1899 --activecnt;
1900}
1901
1902void
1903ev_now_update (EV_P)
1904{
1905 time_update (EV_A_ 1e100);
1906}
1907
1908static int loop_done;
1909
1910void
770void ev_loop (int flags) 1911ev_loop (EV_P_ int flags)
771{ 1912{
772 double block; 1913 loop_done = EVUNLOOP_CANCEL;
773 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1914
1915 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
774 1916
775 do 1917 do
776 { 1918 {
1919#if EV_VERIFY >= 2
1920 ev_loop_verify (EV_A);
1921#endif
1922
1923#ifndef _WIN32
1924 if (expect_false (curpid)) /* penalise the forking check even more */
1925 if (expect_false (getpid () != curpid))
1926 {
1927 curpid = getpid ();
1928 postfork = 1;
1929 }
1930#endif
1931
1932#if EV_FORK_ENABLE
1933 /* we might have forked, so queue fork handlers */
1934 if (expect_false (postfork))
1935 if (forkcnt)
1936 {
1937 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1938 call_pending (EV_A);
1939 }
1940#endif
1941
777 /* queue check watchers (and execute them) */ 1942 /* queue prepare watchers (and execute them) */
778 if (expect_false (preparecnt)) 1943 if (expect_false (preparecnt))
779 { 1944 {
780 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1945 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
781 call_pending (); 1946 call_pending (EV_A);
782 } 1947 }
783 1948
1949 if (expect_false (!activecnt))
1950 break;
1951
1952 /* we might have forked, so reify kernel state if necessary */
1953 if (expect_false (postfork))
1954 loop_fork (EV_A);
1955
784 /* update fd-related kernel structures */ 1956 /* update fd-related kernel structures */
785 fd_reify (); 1957 fd_reify (EV_A);
786 1958
787 /* calculate blocking time */ 1959 /* calculate blocking time */
1960 {
1961 ev_tstamp waittime = 0.;
1962 ev_tstamp sleeptime = 0.;
788 1963
789 /* we only need this for !monotonic clockor timers, but as we basically 1964 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
790 always have timers, we just calculate it always */
791#if EV_USE_MONOTONIC
792 if (expect_true (have_monotonic))
793 time_update_monotonic ();
794 else
795#endif
796 { 1965 {
797 ev_now = ev_time (); 1966 /* update time to cancel out callback processing overhead */
798 now = ev_now; 1967 time_update (EV_A_ 1e100);
799 }
800 1968
801 if (flags & EVLOOP_NONBLOCK || idlecnt)
802 block = 0.;
803 else
804 {
805 block = MAX_BLOCKTIME; 1969 waittime = MAX_BLOCKTIME;
806 1970
807 if (timercnt) 1971 if (timercnt)
808 { 1972 {
809 ev_tstamp to = timers [0]->at - now + method_fudge; 1973 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
810 if (block > to) block = to; 1974 if (waittime > to) waittime = to;
811 } 1975 }
812 1976
1977#if EV_PERIODIC_ENABLE
813 if (periodiccnt) 1978 if (periodiccnt)
814 { 1979 {
815 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1980 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
816 if (block > to) block = to; 1981 if (waittime > to) waittime = to;
817 } 1982 }
1983#endif
818 1984
819 if (block < 0.) block = 0.; 1985 if (expect_false (waittime < timeout_blocktime))
1986 waittime = timeout_blocktime;
1987
1988 sleeptime = waittime - backend_fudge;
1989
1990 if (expect_true (sleeptime > io_blocktime))
1991 sleeptime = io_blocktime;
1992
1993 if (sleeptime)
1994 {
1995 ev_sleep (sleeptime);
1996 waittime -= sleeptime;
1997 }
820 } 1998 }
821 1999
822 method_poll (block); 2000 ++loop_count;
2001 backend_poll (EV_A_ waittime);
823 2002
824 /* update ev_now, do magic */ 2003 /* update ev_rt_now, do magic */
825 time_update (); 2004 time_update (EV_A_ waittime + sleeptime);
2005 }
826 2006
827 /* queue pending timers and reschedule them */ 2007 /* queue pending timers and reschedule them */
828 timers_reify (); /* relative timers called last */ 2008 timers_reify (EV_A); /* relative timers called last */
2009#if EV_PERIODIC_ENABLE
829 periodics_reify (); /* absolute timers called first */ 2010 periodics_reify (EV_A); /* absolute timers called first */
2011#endif
830 2012
2013#if EV_IDLE_ENABLE
831 /* queue idle watchers unless io or timers are pending */ 2014 /* queue idle watchers unless other events are pending */
832 if (!pendingcnt) 2015 idle_reify (EV_A);
833 queue_events ((W *)idles, idlecnt, EV_IDLE); 2016#endif
834 2017
835 /* queue check watchers, to be executed first */ 2018 /* queue check watchers, to be executed first */
836 if (checkcnt) 2019 if (expect_false (checkcnt))
837 queue_events ((W *)checks, checkcnt, EV_CHECK); 2020 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
838 2021
839 call_pending (); 2022 call_pending (EV_A);
840 } 2023 }
841 while (!ev_loop_done); 2024 while (expect_true (
2025 activecnt
2026 && !loop_done
2027 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028 ));
842 2029
843 if (ev_loop_done != 2) 2030 if (loop_done == EVUNLOOP_ONE)
2031 loop_done = EVUNLOOP_CANCEL;
2032}
2033
2034void
2035ev_unloop (EV_P_ int how)
2036{
844 ev_loop_done = 0; 2037 loop_done = how;
845} 2038}
846 2039
847/*****************************************************************************/ 2040/*****************************************************************************/
848 2041
849static void 2042void inline_size
850wlist_add (WL *head, WL elem) 2043wlist_add (WL *head, WL elem)
851{ 2044{
852 elem->next = *head; 2045 elem->next = *head;
853 *head = elem; 2046 *head = elem;
854} 2047}
855 2048
856static void 2049void inline_size
857wlist_del (WL *head, WL elem) 2050wlist_del (WL *head, WL elem)
858{ 2051{
859 while (*head) 2052 while (*head)
860 { 2053 {
861 if (*head == elem) 2054 if (*head == elem)
… …
866 2059
867 head = &(*head)->next; 2060 head = &(*head)->next;
868 } 2061 }
869} 2062}
870 2063
871static void 2064void inline_speed
872ev_clear_pending (W w) 2065clear_pending (EV_P_ W w)
873{ 2066{
874 if (w->pending) 2067 if (w->pending)
875 { 2068 {
876 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2069 pendings [ABSPRI (w)][w->pending - 1].w = 0;
877 w->pending = 0; 2070 w->pending = 0;
878 } 2071 }
879} 2072}
880 2073
881static void 2074int
2075ev_clear_pending (EV_P_ void *w)
2076{
2077 W w_ = (W)w;
2078 int pending = w_->pending;
2079
2080 if (expect_true (pending))
2081 {
2082 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2083 w_->pending = 0;
2084 p->w = 0;
2085 return p->events;
2086 }
2087 else
2088 return 0;
2089}
2090
2091void inline_size
2092pri_adjust (EV_P_ W w)
2093{
2094 int pri = w->priority;
2095 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097 w->priority = pri;
2098}
2099
2100void inline_speed
882ev_start (W w, int active) 2101ev_start (EV_P_ W w, int active)
883{ 2102{
884 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2103 pri_adjust (EV_A_ w);
885 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
886
887 w->active = active; 2104 w->active = active;
2105 ev_ref (EV_A);
888} 2106}
889 2107
890static void 2108void inline_size
891ev_stop (W w) 2109ev_stop (EV_P_ W w)
892{ 2110{
2111 ev_unref (EV_A);
893 w->active = 0; 2112 w->active = 0;
894} 2113}
895 2114
896/*****************************************************************************/ 2115/*****************************************************************************/
897 2116
898void 2117void noinline
899ev_io_start (struct ev_io *w) 2118ev_io_start (EV_P_ ev_io *w)
900{ 2119{
901 int fd = w->fd; 2120 int fd = w->fd;
902 2121
903 if (ev_is_active (w)) 2122 if (expect_false (ev_is_active (w)))
904 return; 2123 return;
905 2124
906 assert (("ev_io_start called with negative fd", fd >= 0)); 2125 assert (("ev_io_start called with negative fd", fd >= 0));
2126 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
907 2127
2128 EV_FREQUENT_CHECK;
2129
908 ev_start ((W)w, 1); 2130 ev_start (EV_A_ (W)w, 1);
909 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2131 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
910 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2132 wlist_add (&anfds[fd].head, (WL)w);
911 2133
912 fd_change (fd); 2134 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
913} 2135 w->events &= ~EV_IOFDSET;
914 2136
915void 2137 EV_FREQUENT_CHECK;
2138}
2139
2140void noinline
916ev_io_stop (struct ev_io *w) 2141ev_io_stop (EV_P_ ev_io *w)
917{ 2142{
918 ev_clear_pending ((W)w); 2143 clear_pending (EV_A_ (W)w);
919 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
920 return; 2145 return;
921 2146
2147 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2148
2149 EV_FREQUENT_CHECK;
2150
922 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2151 wlist_del (&anfds[w->fd].head, (WL)w);
923 ev_stop ((W)w); 2152 ev_stop (EV_A_ (W)w);
924 2153
925 fd_change (w->fd); 2154 fd_change (EV_A_ w->fd, 1);
926}
927 2155
928void 2156 EV_FREQUENT_CHECK;
2157}
2158
2159void noinline
929ev_timer_start (struct ev_timer *w) 2160ev_timer_start (EV_P_ ev_timer *w)
930{ 2161{
931 if (ev_is_active (w)) 2162 if (expect_false (ev_is_active (w)))
932 return; 2163 return;
933 2164
934 w->at += now; 2165 ev_at (w) += mn_now;
935 2166
936 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2167 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
937 2168
938 ev_start ((W)w, ++timercnt); 2169 EV_FREQUENT_CHECK;
939 array_needsize (timers, timermax, timercnt, );
940 timers [timercnt - 1] = w;
941 upheap ((WT *)timers, timercnt - 1);
942}
943 2170
944void 2171 ++timercnt;
2172 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2173 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2174 ANHE_w (timers [ev_active (w)]) = (WT)w;
2175 ANHE_at_cache (timers [ev_active (w)]);
2176 upheap (timers, ev_active (w));
2177
2178 EV_FREQUENT_CHECK;
2179
2180 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2181}
2182
2183void noinline
945ev_timer_stop (struct ev_timer *w) 2184ev_timer_stop (EV_P_ ev_timer *w)
946{ 2185{
947 ev_clear_pending ((W)w); 2186 clear_pending (EV_A_ (W)w);
948 if (!ev_is_active (w)) 2187 if (expect_false (!ev_is_active (w)))
949 return; 2188 return;
950 2189
951 if (w->active < timercnt--) 2190 EV_FREQUENT_CHECK;
2191
2192 {
2193 int active = ev_active (w);
2194
2195 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196
2197 --timercnt;
2198
2199 if (expect_true (active < timercnt + HEAP0))
952 { 2200 {
953 timers [w->active - 1] = timers [timercnt]; 2201 timers [active] = timers [timercnt + HEAP0];
954 downheap ((WT *)timers, timercnt, w->active - 1); 2202 adjustheap (timers, timercnt, active);
955 } 2203 }
2204 }
956 2205
957 w->at = w->repeat; 2206 EV_FREQUENT_CHECK;
958 2207
2208 ev_at (w) -= mn_now;
2209
959 ev_stop ((W)w); 2210 ev_stop (EV_A_ (W)w);
960} 2211}
961 2212
962void 2213void noinline
963ev_timer_again (struct ev_timer *w) 2214ev_timer_again (EV_P_ ev_timer *w)
964{ 2215{
2216 EV_FREQUENT_CHECK;
2217
965 if (ev_is_active (w)) 2218 if (ev_is_active (w))
966 { 2219 {
967 if (w->repeat) 2220 if (w->repeat)
968 { 2221 {
969 w->at = now + w->repeat; 2222 ev_at (w) = mn_now + w->repeat;
2223 ANHE_at_cache (timers [ev_active (w)]);
970 downheap ((WT *)timers, timercnt, w->active - 1); 2224 adjustheap (timers, timercnt, ev_active (w));
971 } 2225 }
972 else 2226 else
973 ev_timer_stop (w); 2227 ev_timer_stop (EV_A_ w);
974 } 2228 }
975 else if (w->repeat) 2229 else if (w->repeat)
2230 {
2231 ev_at (w) = w->repeat;
976 ev_timer_start (w); 2232 ev_timer_start (EV_A_ w);
977} 2233 }
978 2234
979void 2235 EV_FREQUENT_CHECK;
2236}
2237
2238#if EV_PERIODIC_ENABLE
2239void noinline
980ev_periodic_start (struct ev_periodic *w) 2240ev_periodic_start (EV_P_ ev_periodic *w)
981{ 2241{
982 if (ev_is_active (w)) 2242 if (expect_false (ev_is_active (w)))
983 return; 2243 return;
984 2244
2245 if (w->reschedule_cb)
2246 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247 else if (w->interval)
2248 {
985 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2249 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
986
987 /* this formula differs from the one in periodic_reify because we do not always round up */ 2250 /* this formula differs from the one in periodic_reify because we do not always round up */
988 if (w->interval)
989 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2251 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2252 }
2253 else
2254 ev_at (w) = w->offset;
990 2255
2256 EV_FREQUENT_CHECK;
2257
2258 ++periodiccnt;
991 ev_start ((W)w, ++periodiccnt); 2259 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
992 array_needsize (periodics, periodicmax, periodiccnt, ); 2260 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
993 periodics [periodiccnt - 1] = w; 2261 ANHE_w (periodics [ev_active (w)]) = (WT)w;
994 upheap ((WT *)periodics, periodiccnt - 1); 2262 ANHE_at_cache (periodics [ev_active (w)]);
995} 2263 upheap (periodics, ev_active (w));
996 2264
997void 2265 EV_FREQUENT_CHECK;
2266
2267 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2268}
2269
2270void noinline
998ev_periodic_stop (struct ev_periodic *w) 2271ev_periodic_stop (EV_P_ ev_periodic *w)
999{ 2272{
1000 ev_clear_pending ((W)w); 2273 clear_pending (EV_A_ (W)w);
1001 if (!ev_is_active (w)) 2274 if (expect_false (!ev_is_active (w)))
1002 return; 2275 return;
1003 2276
1004 if (w->active < periodiccnt--) 2277 EV_FREQUENT_CHECK;
2278
2279 {
2280 int active = ev_active (w);
2281
2282 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283
2284 --periodiccnt;
2285
2286 if (expect_true (active < periodiccnt + HEAP0))
1005 { 2287 {
1006 periodics [w->active - 1] = periodics [periodiccnt]; 2288 periodics [active] = periodics [periodiccnt + HEAP0];
1007 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2289 adjustheap (periodics, periodiccnt, active);
1008 } 2290 }
2291 }
1009 2292
2293 EV_FREQUENT_CHECK;
2294
1010 ev_stop ((W)w); 2295 ev_stop (EV_A_ (W)w);
1011} 2296}
1012 2297
1013void 2298void noinline
2299ev_periodic_again (EV_P_ ev_periodic *w)
2300{
2301 /* TODO: use adjustheap and recalculation */
2302 ev_periodic_stop (EV_A_ w);
2303 ev_periodic_start (EV_A_ w);
2304}
2305#endif
2306
2307#ifndef SA_RESTART
2308# define SA_RESTART 0
2309#endif
2310
2311void noinline
1014ev_signal_start (struct ev_signal *w) 2312ev_signal_start (EV_P_ ev_signal *w)
1015{ 2313{
2314#if EV_MULTIPLICITY
2315 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316#endif
1016 if (ev_is_active (w)) 2317 if (expect_false (ev_is_active (w)))
1017 return; 2318 return;
1018 2319
1019 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2320 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1020 2321
2322 evpipe_init (EV_A);
2323
2324 EV_FREQUENT_CHECK;
2325
2326 {
2327#ifndef _WIN32
2328 sigset_t full, prev;
2329 sigfillset (&full);
2330 sigprocmask (SIG_SETMASK, &full, &prev);
2331#endif
2332
2333 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2334
2335#ifndef _WIN32
2336 sigprocmask (SIG_SETMASK, &prev, 0);
2337#endif
2338 }
2339
1021 ev_start ((W)w, 1); 2340 ev_start (EV_A_ (W)w, 1);
1022 array_needsize (signals, signalmax, w->signum, signals_init);
1023 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2341 wlist_add (&signals [w->signum - 1].head, (WL)w);
1024 2342
1025 if (!w->next) 2343 if (!((WL)w)->next)
1026 { 2344 {
2345#if _WIN32
2346 signal (w->signum, ev_sighandler);
2347#else
1027 struct sigaction sa; 2348 struct sigaction sa;
1028 sa.sa_handler = sighandler; 2349 sa.sa_handler = ev_sighandler;
1029 sigfillset (&sa.sa_mask); 2350 sigfillset (&sa.sa_mask);
1030 sa.sa_flags = 0; 2351 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1031 sigaction (w->signum, &sa, 0); 2352 sigaction (w->signum, &sa, 0);
2353#endif
1032 } 2354 }
1033}
1034 2355
1035void 2356 EV_FREQUENT_CHECK;
2357}
2358
2359void noinline
1036ev_signal_stop (struct ev_signal *w) 2360ev_signal_stop (EV_P_ ev_signal *w)
1037{ 2361{
1038 ev_clear_pending ((W)w); 2362 clear_pending (EV_A_ (W)w);
1039 if (!ev_is_active (w)) 2363 if (expect_false (!ev_is_active (w)))
1040 return; 2364 return;
1041 2365
2366 EV_FREQUENT_CHECK;
2367
1042 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2368 wlist_del (&signals [w->signum - 1].head, (WL)w);
1043 ev_stop ((W)w); 2369 ev_stop (EV_A_ (W)w);
1044 2370
1045 if (!signals [w->signum - 1].head) 2371 if (!signals [w->signum - 1].head)
1046 signal (w->signum, SIG_DFL); 2372 signal (w->signum, SIG_DFL);
1047}
1048 2373
2374 EV_FREQUENT_CHECK;
2375}
2376
1049void 2377void
1050ev_idle_start (struct ev_idle *w) 2378ev_child_start (EV_P_ ev_child *w)
1051{ 2379{
2380#if EV_MULTIPLICITY
2381 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2382#endif
1052 if (ev_is_active (w)) 2383 if (expect_false (ev_is_active (w)))
1053 return; 2384 return;
1054 2385
1055 ev_start ((W)w, ++idlecnt); 2386 EV_FREQUENT_CHECK;
1056 array_needsize (idles, idlemax, idlecnt, );
1057 idles [idlecnt - 1] = w;
1058}
1059 2387
2388 ev_start (EV_A_ (W)w, 1);
2389 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2390
2391 EV_FREQUENT_CHECK;
2392}
2393
1060void 2394void
1061ev_idle_stop (struct ev_idle *w) 2395ev_child_stop (EV_P_ ev_child *w)
1062{ 2396{
1063 ev_clear_pending ((W)w); 2397 clear_pending (EV_A_ (W)w);
1064 if (ev_is_active (w)) 2398 if (expect_false (!ev_is_active (w)))
1065 return; 2399 return;
1066 2400
1067 idles [w->active - 1] = idles [--idlecnt]; 2401 EV_FREQUENT_CHECK;
2402
2403 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1068 ev_stop ((W)w); 2404 ev_stop (EV_A_ (W)w);
1069}
1070 2405
1071void 2406 EV_FREQUENT_CHECK;
1072ev_prepare_start (struct ev_prepare *w) 2407}
2408
2409#if EV_STAT_ENABLE
2410
2411# ifdef _WIN32
2412# undef lstat
2413# define lstat(a,b) _stati64 (a,b)
2414# endif
2415
2416#define DEF_STAT_INTERVAL 5.0074891
2417#define MIN_STAT_INTERVAL 0.1074891
2418
2419static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420
2421#if EV_USE_INOTIFY
2422# define EV_INOTIFY_BUFSIZE 8192
2423
2424static void noinline
2425infy_add (EV_P_ ev_stat *w)
1073{ 2426{
1074 if (ev_is_active (w)) 2427 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);
2428
2429 if (w->wd < 0)
2430 {
2431 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432
2433 /* monitor some parent directory for speedup hints */
2434 /* note that exceeding the hardcoded limit is not a correctness issue, */
2435 /* but an efficiency issue only */
2436 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437 {
2438 char path [4096];
2439 strcpy (path, w->path);
2440
2441 do
2442 {
2443 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445
2446 char *pend = strrchr (path, '/');
2447
2448 if (!pend)
2449 break; /* whoops, no '/', complain to your admin */
2450
2451 *pend = 0;
2452 w->wd = inotify_add_watch (fs_fd, path, mask);
2453 }
2454 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455 }
2456 }
2457 else
2458 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459
2460 if (w->wd >= 0)
2461 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2462}
2463
2464static void noinline
2465infy_del (EV_P_ ev_stat *w)
2466{
2467 int slot;
2468 int wd = w->wd;
2469
2470 if (wd < 0)
1075 return; 2471 return;
1076 2472
2473 w->wd = -2;
2474 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2475 wlist_del (&fs_hash [slot].head, (WL)w);
2476
2477 /* remove this watcher, if others are watching it, they will rearm */
2478 inotify_rm_watch (fs_fd, wd);
2479}
2480
2481static void noinline
2482infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2483{
2484 if (slot < 0)
2485 /* overflow, need to check for all hash slots */
2486 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2487 infy_wd (EV_A_ slot, wd, ev);
2488 else
2489 {
2490 WL w_;
2491
2492 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2493 {
2494 ev_stat *w = (ev_stat *)w_;
2495 w_ = w_->next; /* lets us remove this watcher and all before it */
2496
2497 if (w->wd == wd || wd == -1)
2498 {
2499 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500 {
2501 w->wd = -1;
2502 infy_add (EV_A_ w); /* re-add, no matter what */
2503 }
2504
2505 stat_timer_cb (EV_A_ &w->timer, 0);
2506 }
2507 }
2508 }
2509}
2510
2511static void
2512infy_cb (EV_P_ ev_io *w, int revents)
2513{
2514 char buf [EV_INOTIFY_BUFSIZE];
2515 struct inotify_event *ev = (struct inotify_event *)buf;
2516 int ofs;
2517 int len = read (fs_fd, buf, sizeof (buf));
2518
2519 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521}
2522
2523void inline_size
2524infy_init (EV_P)
2525{
2526 if (fs_fd != -2)
2527 return;
2528
2529 /* kernels < 2.6.25 are borked
2530 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531 */
2532 {
2533 struct utsname buf;
2534 int major, minor, micro;
2535
2536 fs_fd = -1;
2537
2538 if (uname (&buf))
2539 return;
2540
2541 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542 return;
2543
2544 if (major < 2
2545 || (major == 2 && minor < 6)
2546 || (major == 2 && minor == 6 && micro < 25))
2547 return;
2548 }
2549
2550 fs_fd = inotify_init ();
2551
2552 if (fs_fd >= 0)
2553 {
2554 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2555 ev_set_priority (&fs_w, EV_MAXPRI);
2556 ev_io_start (EV_A_ &fs_w);
2557 }
2558}
2559
2560void inline_size
2561infy_fork (EV_P)
2562{
2563 int slot;
2564
2565 if (fs_fd < 0)
2566 return;
2567
2568 close (fs_fd);
2569 fs_fd = inotify_init ();
2570
2571 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2572 {
2573 WL w_ = fs_hash [slot].head;
2574 fs_hash [slot].head = 0;
2575
2576 while (w_)
2577 {
2578 ev_stat *w = (ev_stat *)w_;
2579 w_ = w_->next; /* lets us add this watcher */
2580
2581 w->wd = -1;
2582
2583 if (fs_fd >= 0)
2584 infy_add (EV_A_ w); /* re-add, no matter what */
2585 else
2586 ev_timer_start (EV_A_ &w->timer);
2587 }
2588 }
2589}
2590
2591#endif
2592
2593#ifdef _WIN32
2594# define EV_LSTAT(p,b) _stati64 (p, b)
2595#else
2596# define EV_LSTAT(p,b) lstat (p, b)
2597#endif
2598
2599void
2600ev_stat_stat (EV_P_ ev_stat *w)
2601{
2602 if (lstat (w->path, &w->attr) < 0)
2603 w->attr.st_nlink = 0;
2604 else if (!w->attr.st_nlink)
2605 w->attr.st_nlink = 1;
2606}
2607
2608static void noinline
2609stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2610{
2611 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2612
2613 /* we copy this here each the time so that */
2614 /* prev has the old value when the callback gets invoked */
2615 w->prev = w->attr;
2616 ev_stat_stat (EV_A_ w);
2617
2618 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2619 if (
2620 w->prev.st_dev != w->attr.st_dev
2621 || w->prev.st_ino != w->attr.st_ino
2622 || w->prev.st_mode != w->attr.st_mode
2623 || w->prev.st_nlink != w->attr.st_nlink
2624 || w->prev.st_uid != w->attr.st_uid
2625 || w->prev.st_gid != w->attr.st_gid
2626 || w->prev.st_rdev != w->attr.st_rdev
2627 || w->prev.st_size != w->attr.st_size
2628 || w->prev.st_atime != w->attr.st_atime
2629 || w->prev.st_mtime != w->attr.st_mtime
2630 || w->prev.st_ctime != w->attr.st_ctime
2631 ) {
2632 #if EV_USE_INOTIFY
2633 if (fs_fd >= 0)
2634 {
2635 infy_del (EV_A_ w);
2636 infy_add (EV_A_ w);
2637 ev_stat_stat (EV_A_ w); /* avoid race... */
2638 }
2639 #endif
2640
2641 ev_feed_event (EV_A_ w, EV_STAT);
2642 }
2643}
2644
2645void
2646ev_stat_start (EV_P_ ev_stat *w)
2647{
2648 if (expect_false (ev_is_active (w)))
2649 return;
2650
2651 /* since we use memcmp, we need to clear any padding data etc. */
2652 memset (&w->prev, 0, sizeof (ev_statdata));
2653 memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655 ev_stat_stat (EV_A_ w);
2656
2657 if (w->interval < MIN_STAT_INTERVAL)
2658 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659
2660 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2661 ev_set_priority (&w->timer, ev_priority (w));
2662
2663#if EV_USE_INOTIFY
2664 infy_init (EV_A);
2665
2666 if (fs_fd >= 0)
2667 infy_add (EV_A_ w);
2668 else
2669#endif
2670 ev_timer_start (EV_A_ &w->timer);
2671
2672 ev_start (EV_A_ (W)w, 1);
2673
2674 EV_FREQUENT_CHECK;
2675}
2676
2677void
2678ev_stat_stop (EV_P_ ev_stat *w)
2679{
2680 clear_pending (EV_A_ (W)w);
2681 if (expect_false (!ev_is_active (w)))
2682 return;
2683
2684 EV_FREQUENT_CHECK;
2685
2686#if EV_USE_INOTIFY
2687 infy_del (EV_A_ w);
2688#endif
2689 ev_timer_stop (EV_A_ &w->timer);
2690
2691 ev_stop (EV_A_ (W)w);
2692
2693 EV_FREQUENT_CHECK;
2694}
2695#endif
2696
2697#if EV_IDLE_ENABLE
2698void
2699ev_idle_start (EV_P_ ev_idle *w)
2700{
2701 if (expect_false (ev_is_active (w)))
2702 return;
2703
2704 pri_adjust (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ++idlecnt [ABSPRI (w)];
2710
2711 ++idleall;
2712 ev_start (EV_A_ (W)w, active);
2713
2714 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2715 idles [ABSPRI (w)][active - 1] = w;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719}
2720
2721void
2722ev_idle_stop (EV_P_ ev_idle *w)
2723{
2724 clear_pending (EV_A_ (W)w);
2725 if (expect_false (!ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 {
2731 int active = ev_active (w);
2732
2733 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2734 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2735
2736 ev_stop (EV_A_ (W)w);
2737 --idleall;
2738 }
2739
2740 EV_FREQUENT_CHECK;
2741}
2742#endif
2743
2744void
2745ev_prepare_start (EV_P_ ev_prepare *w)
2746{
2747 if (expect_false (ev_is_active (w)))
2748 return;
2749
2750 EV_FREQUENT_CHECK;
2751
1077 ev_start ((W)w, ++preparecnt); 2752 ev_start (EV_A_ (W)w, ++preparecnt);
1078 array_needsize (prepares, preparemax, preparecnt, ); 2753 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1079 prepares [preparecnt - 1] = w; 2754 prepares [preparecnt - 1] = w;
1080}
1081 2755
2756 EV_FREQUENT_CHECK;
2757}
2758
1082void 2759void
1083ev_prepare_stop (struct ev_prepare *w) 2760ev_prepare_stop (EV_P_ ev_prepare *w)
1084{ 2761{
1085 ev_clear_pending ((W)w); 2762 clear_pending (EV_A_ (W)w);
1086 if (ev_is_active (w)) 2763 if (expect_false (!ev_is_active (w)))
1087 return; 2764 return;
1088 2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
1089 prepares [w->active - 1] = prepares [--preparecnt]; 2771 prepares [active - 1] = prepares [--preparecnt];
2772 ev_active (prepares [active - 1]) = active;
2773 }
2774
1090 ev_stop ((W)w); 2775 ev_stop (EV_A_ (W)w);
1091}
1092 2776
2777 EV_FREQUENT_CHECK;
2778}
2779
1093void 2780void
1094ev_check_start (struct ev_check *w) 2781ev_check_start (EV_P_ ev_check *w)
1095{ 2782{
1096 if (ev_is_active (w)) 2783 if (expect_false (ev_is_active (w)))
1097 return; 2784 return;
1098 2785
2786 EV_FREQUENT_CHECK;
2787
1099 ev_start ((W)w, ++checkcnt); 2788 ev_start (EV_A_ (W)w, ++checkcnt);
1100 array_needsize (checks, checkmax, checkcnt, ); 2789 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1101 checks [checkcnt - 1] = w; 2790 checks [checkcnt - 1] = w;
1102}
1103 2791
2792 EV_FREQUENT_CHECK;
2793}
2794
1104void 2795void
1105ev_check_stop (struct ev_check *w) 2796ev_check_stop (EV_P_ ev_check *w)
1106{ 2797{
1107 ev_clear_pending ((W)w); 2798 clear_pending (EV_A_ (W)w);
1108 if (ev_is_active (w)) 2799 if (expect_false (!ev_is_active (w)))
1109 return; 2800 return;
1110 2801
2802 EV_FREQUENT_CHECK;
2803
2804 {
2805 int active = ev_active (w);
2806
1111 checks [w->active - 1] = checks [--checkcnt]; 2807 checks [active - 1] = checks [--checkcnt];
2808 ev_active (checks [active - 1]) = active;
2809 }
2810
1112 ev_stop ((W)w); 2811 ev_stop (EV_A_ (W)w);
1113}
1114 2812
1115void 2813 EV_FREQUENT_CHECK;
1116ev_child_start (struct ev_child *w) 2814}
2815
2816#if EV_EMBED_ENABLE
2817void noinline
2818ev_embed_sweep (EV_P_ ev_embed *w)
1117{ 2819{
2820 ev_loop (w->other, EVLOOP_NONBLOCK);
2821}
2822
2823static void
2824embed_io_cb (EV_P_ ev_io *io, int revents)
2825{
2826 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2827
1118 if (ev_is_active (w)) 2828 if (ev_cb (w))
2829 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2830 else
2831 ev_loop (w->other, EVLOOP_NONBLOCK);
2832}
2833
2834static void
2835embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2836{
2837 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2838
2839 {
2840 struct ev_loop *loop = w->other;
2841
2842 while (fdchangecnt)
2843 {
2844 fd_reify (EV_A);
2845 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2846 }
2847 }
2848}
2849
2850static void
2851embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852{
2853 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2854
2855 {
2856 struct ev_loop *loop = w->other;
2857
2858 ev_loop_fork (EV_A);
2859 }
2860}
2861
2862#if 0
2863static void
2864embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2865{
2866 ev_idle_stop (EV_A_ idle);
2867}
2868#endif
2869
2870void
2871ev_embed_start (EV_P_ ev_embed *w)
2872{
2873 if (expect_false (ev_is_active (w)))
1119 return; 2874 return;
1120 2875
2876 {
2877 struct ev_loop *loop = w->other;
2878 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883
2884 ev_set_priority (&w->io, ev_priority (w));
2885 ev_io_start (EV_A_ &w->io);
2886
2887 ev_prepare_init (&w->prepare, embed_prepare_cb);
2888 ev_set_priority (&w->prepare, EV_MINPRI);
2889 ev_prepare_start (EV_A_ &w->prepare);
2890
2891 ev_fork_init (&w->fork, embed_fork_cb);
2892 ev_fork_start (EV_A_ &w->fork);
2893
2894 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2895
1121 ev_start ((W)w, 1); 2896 ev_start (EV_A_ (W)w, 1);
1122 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1123}
1124 2897
2898 EV_FREQUENT_CHECK;
2899}
2900
1125void 2901void
1126ev_child_stop (struct ev_child *w) 2902ev_embed_stop (EV_P_ ev_embed *w)
1127{ 2903{
1128 ev_clear_pending ((W)w); 2904 clear_pending (EV_A_ (W)w);
1129 if (ev_is_active (w)) 2905 if (expect_false (!ev_is_active (w)))
1130 return; 2906 return;
1131 2907
1132 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2908 EV_FREQUENT_CHECK;
2909
2910 ev_io_stop (EV_A_ &w->io);
2911 ev_prepare_stop (EV_A_ &w->prepare);
2912 ev_fork_stop (EV_A_ &w->fork);
2913
2914 EV_FREQUENT_CHECK;
2915}
2916#endif
2917
2918#if EV_FORK_ENABLE
2919void
2920ev_fork_start (EV_P_ ev_fork *w)
2921{
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 ev_start (EV_A_ (W)w, ++forkcnt);
2928 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2929 forks [forkcnt - 1] = w;
2930
2931 EV_FREQUENT_CHECK;
2932}
2933
2934void
2935ev_fork_stop (EV_P_ ev_fork *w)
2936{
2937 clear_pending (EV_A_ (W)w);
2938 if (expect_false (!ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 {
2944 int active = ev_active (w);
2945
2946 forks [active - 1] = forks [--forkcnt];
2947 ev_active (forks [active - 1]) = active;
2948 }
2949
1133 ev_stop ((W)w); 2950 ev_stop (EV_A_ (W)w);
2951
2952 EV_FREQUENT_CHECK;
1134} 2953}
2954#endif
2955
2956#if EV_ASYNC_ENABLE
2957void
2958ev_async_start (EV_P_ ev_async *w)
2959{
2960 if (expect_false (ev_is_active (w)))
2961 return;
2962
2963 evpipe_init (EV_A);
2964
2965 EV_FREQUENT_CHECK;
2966
2967 ev_start (EV_A_ (W)w, ++asynccnt);
2968 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2969 asyncs [asynccnt - 1] = w;
2970
2971 EV_FREQUENT_CHECK;
2972}
2973
2974void
2975ev_async_stop (EV_P_ ev_async *w)
2976{
2977 clear_pending (EV_A_ (W)w);
2978 if (expect_false (!ev_is_active (w)))
2979 return;
2980
2981 EV_FREQUENT_CHECK;
2982
2983 {
2984 int active = ev_active (w);
2985
2986 asyncs [active - 1] = asyncs [--asynccnt];
2987 ev_active (asyncs [active - 1]) = active;
2988 }
2989
2990 ev_stop (EV_A_ (W)w);
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_async_send (EV_P_ ev_async *w)
2997{
2998 w->sent = 1;
2999 evpipe_write (EV_A_ &gotasync);
3000}
3001#endif
1135 3002
1136/*****************************************************************************/ 3003/*****************************************************************************/
1137 3004
1138struct ev_once 3005struct ev_once
1139{ 3006{
1140 struct ev_io io; 3007 ev_io io;
1141 struct ev_timer to; 3008 ev_timer to;
1142 void (*cb)(int revents, void *arg); 3009 void (*cb)(int revents, void *arg);
1143 void *arg; 3010 void *arg;
1144}; 3011};
1145 3012
1146static void 3013static void
1147once_cb (struct ev_once *once, int revents) 3014once_cb (EV_P_ struct ev_once *once, int revents)
1148{ 3015{
1149 void (*cb)(int revents, void *arg) = once->cb; 3016 void (*cb)(int revents, void *arg) = once->cb;
1150 void *arg = once->arg; 3017 void *arg = once->arg;
1151 3018
1152 ev_io_stop (&once->io); 3019 ev_io_stop (EV_A_ &once->io);
1153 ev_timer_stop (&once->to); 3020 ev_timer_stop (EV_A_ &once->to);
1154 free (once); 3021 ev_free (once);
1155 3022
1156 cb (revents, arg); 3023 cb (revents, arg);
1157} 3024}
1158 3025
1159static void 3026static void
1160once_cb_io (struct ev_io *w, int revents) 3027once_cb_io (EV_P_ ev_io *w, int revents)
1161{ 3028{
1162 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3029 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3030
3031 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1163} 3032}
1164 3033
1165static void 3034static void
1166once_cb_to (struct ev_timer *w, int revents) 3035once_cb_to (EV_P_ ev_timer *w, int revents)
1167{ 3036{
1168 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3037 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1169}
1170 3038
3039 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3040}
3041
1171void 3042void
1172ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3043ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1173{ 3044{
1174 struct ev_once *once = malloc (sizeof (struct ev_once)); 3045 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1175 3046
1176 if (!once) 3047 if (expect_false (!once))
3048 {
1177 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3049 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1178 else 3050 return;
1179 { 3051 }
3052
1180 once->cb = cb; 3053 once->cb = cb;
1181 once->arg = arg; 3054 once->arg = arg;
1182 3055
1183 ev_watcher_init (&once->io, once_cb_io); 3056 ev_init (&once->io, once_cb_io);
1184 if (fd >= 0) 3057 if (fd >= 0)
1185 { 3058 {
1186 ev_io_set (&once->io, fd, events); 3059 ev_io_set (&once->io, fd, events);
1187 ev_io_start (&once->io); 3060 ev_io_start (EV_A_ &once->io);
1188 } 3061 }
1189 3062
1190 ev_watcher_init (&once->to, once_cb_to); 3063 ev_init (&once->to, once_cb_to);
1191 if (timeout >= 0.) 3064 if (timeout >= 0.)
1192 { 3065 {
1193 ev_timer_set (&once->to, timeout, 0.); 3066 ev_timer_set (&once->to, timeout, 0.);
1194 ev_timer_start (&once->to); 3067 ev_timer_start (EV_A_ &once->to);
1195 }
1196 }
1197}
1198
1199/*****************************************************************************/
1200
1201#if 0
1202
1203struct ev_io wio;
1204
1205static void
1206sin_cb (struct ev_io *w, int revents)
1207{
1208 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1209}
1210
1211static void
1212ocb (struct ev_timer *w, int revents)
1213{
1214 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1215 ev_timer_stop (w);
1216 ev_timer_start (w);
1217}
1218
1219static void
1220scb (struct ev_signal *w, int revents)
1221{
1222 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1223 ev_io_stop (&wio);
1224 ev_io_start (&wio);
1225}
1226
1227static void
1228gcb (struct ev_signal *w, int revents)
1229{
1230 fprintf (stderr, "generic %x\n", revents);
1231
1232}
1233
1234int main (void)
1235{
1236 ev_init (0);
1237
1238 ev_io_init (&wio, sin_cb, 0, EV_READ);
1239 ev_io_start (&wio);
1240
1241 struct ev_timer t[10000];
1242
1243#if 0
1244 int i;
1245 for (i = 0; i < 10000; ++i)
1246 { 3068 }
1247 struct ev_timer *w = t + i;
1248 ev_watcher_init (w, ocb, i);
1249 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1250 ev_timer_start (w);
1251 if (drand48 () < 0.5)
1252 ev_timer_stop (w);
1253 }
1254#endif
1255
1256 struct ev_timer t1;
1257 ev_timer_init (&t1, ocb, 5, 10);
1258 ev_timer_start (&t1);
1259
1260 struct ev_signal sig;
1261 ev_signal_init (&sig, scb, SIGQUIT);
1262 ev_signal_start (&sig);
1263
1264 struct ev_check cw;
1265 ev_check_init (&cw, gcb);
1266 ev_check_start (&cw);
1267
1268 struct ev_idle iw;
1269 ev_idle_init (&iw, gcb);
1270 ev_idle_start (&iw);
1271
1272 ev_loop (0);
1273
1274 return 0;
1275} 3069}
1276 3070
3071#if EV_MULTIPLICITY
3072 #include "ev_wrap.h"
1277#endif 3073#endif
1278 3074
3075#ifdef __cplusplus
3076}
3077#endif
1279 3078
1280
1281

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