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Comparing libev/ev.c (file contents):
Revision 1.137 by root, Sat Nov 24 08:28:10 2007 UTC vs.
Revision 1.288 by root, Sat Apr 25 14:12:48 2009 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) 2007,2008,2009 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 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
41# endif 50# endif
42 51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
43# if HAVE_CLOCK_GETTIME 64# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 65# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 66# define EV_USE_MONOTONIC 1
46# endif 67# endif
47# ifndef EV_USE_REALTIME 68# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 69# define EV_USE_REALTIME 0
49# endif 70# endif
50# else 71# else
51# ifndef EV_USE_MONOTONIC 72# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 73# define EV_USE_MONOTONIC 0
53# endif 74# endif
54# ifndef EV_USE_REALTIME 75# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
56# endif 85# endif
57# endif 86# endif
58 87
59# ifndef EV_USE_SELECT 88# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 89# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
94# else 123# else
95# define EV_USE_PORT 0 124# define EV_USE_PORT 0
96# endif 125# endif
97# endif 126# endif
98 127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
99#endif 144#endif
100 145
101#include <math.h> 146#include <math.h>
102#include <stdlib.h> 147#include <stdlib.h>
103#include <fcntl.h> 148#include <fcntl.h>
… …
110#include <sys/types.h> 155#include <sys/types.h>
111#include <time.h> 156#include <time.h>
112 157
113#include <signal.h> 158#include <signal.h>
114 159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
115#ifndef _WIN32 166#ifndef _WIN32
116# include <unistd.h>
117# include <sys/time.h> 167# include <sys/time.h>
118# include <sys/wait.h> 168# include <sys/wait.h>
169# include <unistd.h>
119#else 170#else
171# include <io.h>
120# define WIN32_LEAN_AND_MEAN 172# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 173# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 174# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 175# define EV_SELECT_IS_WINSOCKET 1
124# endif 176# endif
125#endif 177#endif
126 178
127/**/ 179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
128 188
129#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
130# define EV_USE_MONOTONIC 0 193# define EV_USE_MONOTONIC 0
194# endif
131#endif 195#endif
132 196
133#ifndef EV_USE_REALTIME 197#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
135#endif 207#endif
136 208
137#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
139#endif 211#endif
… …
145# define EV_USE_POLL 1 217# define EV_USE_POLL 1
146# endif 218# endif
147#endif 219#endif
148 220
149#ifndef EV_USE_EPOLL 221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
150# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
226# endif
151#endif 227#endif
152 228
153#ifndef EV_USE_KQUEUE 229#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 230# define EV_USE_KQUEUE 0
155#endif 231#endif
156 232
157#ifndef EV_USE_PORT 233#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 234# define EV_USE_PORT 0
159#endif 235#endif
160 236
161/**/ 237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
162 288
163#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
166#endif 292#endif
… …
168#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 295# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
171#endif 297#endif
172 298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
173#if EV_SELECT_IS_WINSOCKET 321#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 322# include <winsock.h>
175#endif 323#endif
176 324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
177/**/ 346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178 363
179#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183 367
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 368#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline static inline 370# define noinline __attribute__ ((noinline))
193#else 371#else
194# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
195# define inline static 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
196#endif 377#endif
197 378
198#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
199#define expect_true(expr) expect ((expr) != 0, 1) 380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
200 388
201#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
202#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
203 391
204#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 392#define EMPTY /* required for microsofts broken pseudo-c compiler */
205#define EMPTY2(a,b) /* used to suppress some warnings */ 393#define EMPTY2(a,b) /* used to suppress some warnings */
206 394
207typedef ev_watcher *W; 395typedef ev_watcher *W;
208typedef ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
209typedef ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
210 398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
211static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
212 411
213#ifdef _WIN32 412#ifdef _WIN32
214# include "ev_win32.c" 413# include "ev_win32.c"
215#endif 414#endif
216 415
217/*****************************************************************************/ 416/*****************************************************************************/
218 417
219static void (*syserr_cb)(const char *msg); 418static void (*syserr_cb)(const char *msg);
220 419
420void
221void ev_set_syserr_cb (void (*cb)(const char *msg)) 421ev_set_syserr_cb (void (*cb)(const char *msg))
222{ 422{
223 syserr_cb = cb; 423 syserr_cb = cb;
224} 424}
225 425
226static void 426static void noinline
227syserr (const char *msg) 427ev_syserr (const char *msg)
228{ 428{
229 if (!msg) 429 if (!msg)
230 msg = "(libev) system error"; 430 msg = "(libev) system error";
231 431
232 if (syserr_cb) 432 if (syserr_cb)
… …
236 perror (msg); 436 perror (msg);
237 abort (); 437 abort ();
238 } 438 }
239} 439}
240 440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
241static void *(*alloc)(void *ptr, long size); 456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
242 457
458void
243void ev_set_allocator (void *(*cb)(void *ptr, long size)) 459ev_set_allocator (void *(*cb)(void *ptr, long size))
244{ 460{
245 alloc = cb; 461 alloc = cb;
246} 462}
247 463
248static void * 464inline_speed void *
249ev_realloc (void *ptr, long size) 465ev_realloc (void *ptr, long size)
250{ 466{
251 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 467 ptr = alloc (ptr, size);
252 468
253 if (!ptr && size) 469 if (!ptr && size)
254 { 470 {
255 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
256 abort (); 472 abort ();
… …
262#define ev_malloc(size) ev_realloc (0, (size)) 478#define ev_malloc(size) ev_realloc (0, (size))
263#define ev_free(ptr) ev_realloc ((ptr), 0) 479#define ev_free(ptr) ev_realloc ((ptr), 0)
264 480
265/*****************************************************************************/ 481/*****************************************************************************/
266 482
483/* file descriptor info structure */
267typedef struct 484typedef struct
268{ 485{
269 WL head; 486 WL head;
270 unsigned char events; 487 unsigned char events; /* the events watched for */
488 unsigned char reify; /* flag set when this ANFD needs reification */
489 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
271 unsigned char reify; 490 unsigned char unused;
491#if EV_USE_EPOLL
492 unsigned int egen; /* generation counter to counter epoll bugs */
493#endif
272#if EV_SELECT_IS_WINSOCKET 494#if EV_SELECT_IS_WINSOCKET
273 SOCKET handle; 495 SOCKET handle;
274#endif 496#endif
275} ANFD; 497} ANFD;
276 498
499/* stores the pending event set for a given watcher */
277typedef struct 500typedef struct
278{ 501{
279 W w; 502 W w;
280 int events; 503 int events; /* the pending event set for the given watcher */
281} ANPENDING; 504} ANPENDING;
505
506#if EV_USE_INOTIFY
507/* hash table entry per inotify-id */
508typedef struct
509{
510 WL head;
511} ANFS;
512#endif
513
514/* Heap Entry */
515#if EV_HEAP_CACHE_AT
516 /* a heap element */
517 typedef struct {
518 ev_tstamp at;
519 WT w;
520 } ANHE;
521
522 #define ANHE_w(he) (he).w /* access watcher, read-write */
523 #define ANHE_at(he) (he).at /* access cached at, read-only */
524 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
525#else
526 /* a heap element */
527 typedef WT ANHE;
528
529 #define ANHE_w(he) (he)
530 #define ANHE_at(he) (he)->at
531 #define ANHE_at_cache(he)
532#endif
282 533
283#if EV_MULTIPLICITY 534#if EV_MULTIPLICITY
284 535
285 struct ev_loop 536 struct ev_loop
286 { 537 {
… …
310 561
311ev_tstamp 562ev_tstamp
312ev_time (void) 563ev_time (void)
313{ 564{
314#if EV_USE_REALTIME 565#if EV_USE_REALTIME
566 if (expect_true (have_realtime))
567 {
315 struct timespec ts; 568 struct timespec ts;
316 clock_gettime (CLOCK_REALTIME, &ts); 569 clock_gettime (CLOCK_REALTIME, &ts);
317 return ts.tv_sec + ts.tv_nsec * 1e-9; 570 return ts.tv_sec + ts.tv_nsec * 1e-9;
318#else 571 }
572#endif
573
319 struct timeval tv; 574 struct timeval tv;
320 gettimeofday (&tv, 0); 575 gettimeofday (&tv, 0);
321 return tv.tv_sec + tv.tv_usec * 1e-6; 576 return tv.tv_sec + tv.tv_usec * 1e-6;
322#endif
323} 577}
324 578
325inline ev_tstamp 579inline_size ev_tstamp
326get_clock (void) 580get_clock (void)
327{ 581{
328#if EV_USE_MONOTONIC 582#if EV_USE_MONOTONIC
329 if (expect_true (have_monotonic)) 583 if (expect_true (have_monotonic))
330 { 584 {
… …
343{ 597{
344 return ev_rt_now; 598 return ev_rt_now;
345} 599}
346#endif 600#endif
347 601
348#define array_roundsize(type,n) (((n) | 4) & ~3) 602void
603ev_sleep (ev_tstamp delay)
604{
605 if (delay > 0.)
606 {
607#if EV_USE_NANOSLEEP
608 struct timespec ts;
609
610 ts.tv_sec = (time_t)delay;
611 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
612
613 nanosleep (&ts, 0);
614#elif defined(_WIN32)
615 Sleep ((unsigned long)(delay * 1e3));
616#else
617 struct timeval tv;
618
619 tv.tv_sec = (time_t)delay;
620 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621
622 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623 /* somehting nto guaranteed by newer posix versions, but guaranteed */
624 /* by older ones */
625 select (0, 0, 0, 0, &tv);
626#endif
627 }
628}
629
630/*****************************************************************************/
631
632#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
633
634/* find a suitable new size for the given array, */
635/* hopefully by rounding to a ncie-to-malloc size */
636inline_size int
637array_nextsize (int elem, int cur, int cnt)
638{
639 int ncur = cur + 1;
640
641 do
642 ncur <<= 1;
643 while (cnt > ncur);
644
645 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
646 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
647 {
648 ncur *= elem;
649 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
650 ncur = ncur - sizeof (void *) * 4;
651 ncur /= elem;
652 }
653
654 return ncur;
655}
656
657static noinline void *
658array_realloc (int elem, void *base, int *cur, int cnt)
659{
660 *cur = array_nextsize (elem, *cur, cnt);
661 return ev_realloc (base, elem * *cur);
662}
663
664#define array_init_zero(base,count) \
665 memset ((void *)(base), 0, sizeof (*(base)) * (count))
349 666
350#define array_needsize(type,base,cur,cnt,init) \ 667#define array_needsize(type,base,cur,cnt,init) \
351 if (expect_false ((cnt) > cur)) \ 668 if (expect_false ((cnt) > (cur))) \
352 { \ 669 { \
353 int newcnt = cur; \ 670 int ocur_ = (cur); \
354 do \ 671 (base) = (type *)array_realloc \
355 { \ 672 (sizeof (type), (base), &(cur), (cnt)); \
356 newcnt = array_roundsize (type, newcnt << 1); \ 673 init ((base) + (ocur_), (cur) - ocur_); \
357 } \
358 while ((cnt) > newcnt); \
359 \
360 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361 init (base + cur, newcnt - cur); \
362 cur = newcnt; \
363 } 674 }
364 675
676#if 0
365#define array_slim(type,stem) \ 677#define array_slim(type,stem) \
366 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 678 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367 { \ 679 { \
368 stem ## max = array_roundsize (stem ## cnt >> 1); \ 680 stem ## max = array_roundsize (stem ## cnt >> 1); \
369 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 681 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 682 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371 } 683 }
684#endif
372 685
373#define array_free(stem, idx) \ 686#define array_free(stem, idx) \
374 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 687 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
375 688
376/*****************************************************************************/ 689/*****************************************************************************/
377 690
378static void 691/* dummy callback for pending events */
379anfds_init (ANFD *base, int count) 692static void noinline
693pendingcb (EV_P_ ev_prepare *w, int revents)
380{ 694{
381 while (count--)
382 {
383 base->head = 0;
384 base->events = EV_NONE;
385 base->reify = 0;
386
387 ++base;
388 }
389} 695}
390 696
391void 697void noinline
392ev_feed_event (EV_P_ void *w, int revents) 698ev_feed_event (EV_P_ void *w, int revents)
393{ 699{
394 W w_ = (W)w; 700 W w_ = (W)w;
701 int pri = ABSPRI (w_);
395 702
396 if (expect_false (w_->pending)) 703 if (expect_false (w_->pending))
704 pendings [pri][w_->pending - 1].events |= revents;
705 else
397 { 706 {
707 w_->pending = ++pendingcnt [pri];
708 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
709 pendings [pri][w_->pending - 1].w = w_;
398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 710 pendings [pri][w_->pending - 1].events = revents;
399 return;
400 } 711 }
401
402 w_->pending = ++pendingcnt [ABSPRI (w_)];
403 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
404 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
405 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
406} 712}
407 713
408static void 714inline_speed void
715feed_reverse (EV_P_ W w)
716{
717 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
718 rfeeds [rfeedcnt++] = w;
719}
720
721inline_size void
722feed_reverse_done (EV_P_ int revents)
723{
724 do
725 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
726 while (rfeedcnt);
727}
728
729inline_speed void
409queue_events (EV_P_ W *events, int eventcnt, int type) 730queue_events (EV_P_ W *events, int eventcnt, int type)
410{ 731{
411 int i; 732 int i;
412 733
413 for (i = 0; i < eventcnt; ++i) 734 for (i = 0; i < eventcnt; ++i)
414 ev_feed_event (EV_A_ events [i], type); 735 ev_feed_event (EV_A_ events [i], type);
415} 736}
416 737
738/*****************************************************************************/
739
417inline void 740inline_speed void
418fd_event (EV_P_ int fd, int revents) 741fd_event (EV_P_ int fd, int revents)
419{ 742{
420 ANFD *anfd = anfds + fd; 743 ANFD *anfd = anfds + fd;
421 ev_io *w; 744 ev_io *w;
422 745
… …
430} 753}
431 754
432void 755void
433ev_feed_fd_event (EV_P_ int fd, int revents) 756ev_feed_fd_event (EV_P_ int fd, int revents)
434{ 757{
758 if (fd >= 0 && fd < anfdmax)
435 fd_event (EV_A_ fd, revents); 759 fd_event (EV_A_ fd, revents);
436} 760}
437 761
438/*****************************************************************************/ 762/* make sure the external fd watch events are in-sync */
439 763/* with the kernel/libev internal state */
440inline void 764inline_size void
441fd_reify (EV_P) 765fd_reify (EV_P)
442{ 766{
443 int i; 767 int i;
444 768
445 for (i = 0; i < fdchangecnt; ++i) 769 for (i = 0; i < fdchangecnt; ++i)
446 { 770 {
447 int fd = fdchanges [i]; 771 int fd = fdchanges [i];
448 ANFD *anfd = anfds + fd; 772 ANFD *anfd = anfds + fd;
449 ev_io *w; 773 ev_io *w;
450 774
451 int events = 0; 775 unsigned char events = 0;
452 776
453 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 777 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
454 events |= w->events; 778 events |= (unsigned char)w->events;
455 779
456#if EV_SELECT_IS_WINSOCKET 780#if EV_SELECT_IS_WINSOCKET
457 if (events) 781 if (events)
458 { 782 {
459 unsigned long argp; 783 unsigned long arg;
784 #ifdef EV_FD_TO_WIN32_HANDLE
785 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
786 #else
460 anfd->handle = _get_osfhandle (fd); 787 anfd->handle = _get_osfhandle (fd);
788 #endif
461 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 789 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
462 } 790 }
463#endif 791#endif
464 792
793 {
794 unsigned char o_events = anfd->events;
795 unsigned char o_reify = anfd->reify;
796
465 anfd->reify = 0; 797 anfd->reify = 0;
466
467 backend_modify (EV_A_ fd, anfd->events, events);
468 anfd->events = events; 798 anfd->events = events;
799
800 if (o_events != events || o_reify & EV__IOFDSET)
801 backend_modify (EV_A_ fd, o_events, events);
802 }
469 } 803 }
470 804
471 fdchangecnt = 0; 805 fdchangecnt = 0;
472} 806}
473 807
474static void 808/* something about the given fd changed */
809inline_size void
475fd_change (EV_P_ int fd) 810fd_change (EV_P_ int fd, int flags)
476{ 811{
477 if (expect_false (anfds [fd].reify)) 812 unsigned char reify = anfds [fd].reify;
478 return;
479
480 anfds [fd].reify = 1; 813 anfds [fd].reify |= flags;
481 814
815 if (expect_true (!reify))
816 {
482 ++fdchangecnt; 817 ++fdchangecnt;
483 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 818 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
484 fdchanges [fdchangecnt - 1] = fd; 819 fdchanges [fdchangecnt - 1] = fd;
820 }
485} 821}
486 822
487static void 823/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
824inline_speed void
488fd_kill (EV_P_ int fd) 825fd_kill (EV_P_ int fd)
489{ 826{
490 ev_io *w; 827 ev_io *w;
491 828
492 while ((w = (ev_io *)anfds [fd].head)) 829 while ((w = (ev_io *)anfds [fd].head))
… …
494 ev_io_stop (EV_A_ w); 831 ev_io_stop (EV_A_ w);
495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 832 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
496 } 833 }
497} 834}
498 835
836/* check whether the given fd is atcually valid, for error recovery */
499inline int 837inline_size int
500fd_valid (int fd) 838fd_valid (int fd)
501{ 839{
502#ifdef _WIN32 840#ifdef _WIN32
503 return _get_osfhandle (fd) != -1; 841 return _get_osfhandle (fd) != -1;
504#else 842#else
505 return fcntl (fd, F_GETFD) != -1; 843 return fcntl (fd, F_GETFD) != -1;
506#endif 844#endif
507} 845}
508 846
509/* called on EBADF to verify fds */ 847/* called on EBADF to verify fds */
510static void 848static void noinline
511fd_ebadf (EV_P) 849fd_ebadf (EV_P)
512{ 850{
513 int fd; 851 int fd;
514 852
515 for (fd = 0; fd < anfdmax; ++fd) 853 for (fd = 0; fd < anfdmax; ++fd)
516 if (anfds [fd].events) 854 if (anfds [fd].events)
517 if (!fd_valid (fd) == -1 && errno == EBADF) 855 if (!fd_valid (fd) && errno == EBADF)
518 fd_kill (EV_A_ fd); 856 fd_kill (EV_A_ fd);
519} 857}
520 858
521/* called on ENOMEM in select/poll to kill some fds and retry */ 859/* called on ENOMEM in select/poll to kill some fds and retry */
522static void 860static void noinline
523fd_enomem (EV_P) 861fd_enomem (EV_P)
524{ 862{
525 int fd; 863 int fd;
526 864
527 for (fd = anfdmax; fd--; ) 865 for (fd = anfdmax; fd--; )
… …
531 return; 869 return;
532 } 870 }
533} 871}
534 872
535/* usually called after fork if backend needs to re-arm all fds from scratch */ 873/* usually called after fork if backend needs to re-arm all fds from scratch */
536static void 874static void noinline
537fd_rearm_all (EV_P) 875fd_rearm_all (EV_P)
538{ 876{
539 int fd; 877 int fd;
540 878
541 /* this should be highly optimised to not do anything but set a flag */
542 for (fd = 0; fd < anfdmax; ++fd) 879 for (fd = 0; fd < anfdmax; ++fd)
543 if (anfds [fd].events) 880 if (anfds [fd].events)
544 { 881 {
545 anfds [fd].events = 0; 882 anfds [fd].events = 0;
883 anfds [fd].emask = 0;
546 fd_change (EV_A_ fd); 884 fd_change (EV_A_ fd, EV__IOFDSET | 1);
547 } 885 }
548} 886}
549 887
550/*****************************************************************************/ 888/*****************************************************************************/
551 889
552static void 890/*
553upheap (WT *heap, int k) 891 * the heap functions want a real array index. array index 0 uis guaranteed to not
554{ 892 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
555 WT w = heap [k]; 893 * the branching factor of the d-tree.
894 */
556 895
557 while (k && heap [k >> 1]->at > w->at) 896/*
558 { 897 * at the moment we allow libev the luxury of two heaps,
559 heap [k] = heap [k >> 1]; 898 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
560 ((W)heap [k])->active = k + 1; 899 * which is more cache-efficient.
561 k >>= 1; 900 * the difference is about 5% with 50000+ watchers.
562 } 901 */
902#if EV_USE_4HEAP
563 903
564 heap [k] = w; 904#define DHEAP 4
565 ((W)heap [k])->active = k + 1; 905#define HEAP0 (DHEAP - 1) /* index of first element in heap */
906#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
907#define UPHEAP_DONE(p,k) ((p) == (k))
566 908
567} 909/* away from the root */
568 910inline_speed void
569static void
570downheap (WT *heap, int N, int k) 911downheap (ANHE *heap, int N, int k)
571{ 912{
572 WT w = heap [k]; 913 ANHE he = heap [k];
914 ANHE *E = heap + N + HEAP0;
573 915
574 while (k < (N >> 1)) 916 for (;;)
575 { 917 {
576 int j = k << 1; 918 ev_tstamp minat;
919 ANHE *minpos;
920 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
577 921
578 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 922 /* find minimum child */
923 if (expect_true (pos + DHEAP - 1 < E))
579 ++j; 924 {
580 925 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
581 if (w->at <= heap [j]->at) 926 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
927 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
928 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
929 }
930 else if (pos < E)
931 {
932 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
933 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
934 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
935 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
936 }
937 else
582 break; 938 break;
583 939
940 if (ANHE_at (he) <= minat)
941 break;
942
943 heap [k] = *minpos;
944 ev_active (ANHE_w (*minpos)) = k;
945
946 k = minpos - heap;
947 }
948
949 heap [k] = he;
950 ev_active (ANHE_w (he)) = k;
951}
952
953#else /* 4HEAP */
954
955#define HEAP0 1
956#define HPARENT(k) ((k) >> 1)
957#define UPHEAP_DONE(p,k) (!(p))
958
959/* away from the root */
960inline_speed void
961downheap (ANHE *heap, int N, int k)
962{
963 ANHE he = heap [k];
964
965 for (;;)
966 {
967 int c = k << 1;
968
969 if (c > N + HEAP0 - 1)
970 break;
971
972 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973 ? 1 : 0;
974
975 if (ANHE_at (he) <= ANHE_at (heap [c]))
976 break;
977
584 heap [k] = heap [j]; 978 heap [k] = heap [c];
585 ((W)heap [k])->active = k + 1; 979 ev_active (ANHE_w (heap [k])) = k;
980
586 k = j; 981 k = c;
587 } 982 }
588 983
589 heap [k] = w; 984 heap [k] = he;
590 ((W)heap [k])->active = k + 1; 985 ev_active (ANHE_w (he)) = k;
591} 986}
987#endif
592 988
989/* towards the root */
990inline_speed void
991upheap (ANHE *heap, int k)
992{
993 ANHE he = heap [k];
994
995 for (;;)
996 {
997 int p = HPARENT (k);
998
999 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1000 break;
1001
1002 heap [k] = heap [p];
1003 ev_active (ANHE_w (heap [k])) = k;
1004 k = p;
1005 }
1006
1007 heap [k] = he;
1008 ev_active (ANHE_w (he)) = k;
1009}
1010
1011/* move an element suitably so it is in a correct place */
593inline void 1012inline_size void
594adjustheap (WT *heap, int N, int k) 1013adjustheap (ANHE *heap, int N, int k)
595{ 1014{
1015 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
596 upheap (heap, k); 1016 upheap (heap, k);
1017 else
597 downheap (heap, N, k); 1018 downheap (heap, N, k);
1019}
1020
1021/* rebuild the heap: this function is used only once and executed rarely */
1022inline_size void
1023reheap (ANHE *heap, int N)
1024{
1025 int i;
1026
1027 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1028 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1029 for (i = 0; i < N; ++i)
1030 upheap (heap, i + HEAP0);
598} 1031}
599 1032
600/*****************************************************************************/ 1033/*****************************************************************************/
601 1034
1035/* associate signal watchers to a signal signal */
602typedef struct 1036typedef struct
603{ 1037{
604 WL head; 1038 WL head;
605 sig_atomic_t volatile gotsig; 1039 EV_ATOMIC_T gotsig;
606} ANSIG; 1040} ANSIG;
607 1041
608static ANSIG *signals; 1042static ANSIG *signals;
609static int signalmax; 1043static int signalmax;
610 1044
611static int sigpipe [2]; 1045static EV_ATOMIC_T gotsig;
612static sig_atomic_t volatile gotsig;
613static ev_io sigev;
614 1046
615static void 1047/*****************************************************************************/
616signals_init (ANSIG *base, int count)
617{
618 while (count--)
619 {
620 base->head = 0;
621 base->gotsig = 0;
622 1048
623 ++base; 1049/* used to prepare libev internal fd's */
624 } 1050/* this is not fork-safe */
625} 1051inline_speed void
626
627static void
628sighandler (int signum)
629{
630#if _WIN32
631 signal (signum, sighandler);
632#endif
633
634 signals [signum - 1].gotsig = 1;
635
636 if (!gotsig)
637 {
638 int old_errno = errno;
639 gotsig = 1;
640 write (sigpipe [1], &signum, 1);
641 errno = old_errno;
642 }
643}
644
645void
646ev_feed_signal_event (EV_P_ int signum)
647{
648 WL w;
649
650#if EV_MULTIPLICITY
651 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
652#endif
653
654 --signum;
655
656 if (signum < 0 || signum >= signalmax)
657 return;
658
659 signals [signum].gotsig = 0;
660
661 for (w = signals [signum].head; w; w = w->next)
662 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
663}
664
665static void
666sigcb (EV_P_ ev_io *iow, int revents)
667{
668 int signum;
669
670 read (sigpipe [0], &revents, 1);
671 gotsig = 0;
672
673 for (signum = signalmax; signum--; )
674 if (signals [signum].gotsig)
675 ev_feed_signal_event (EV_A_ signum + 1);
676}
677
678static void
679fd_intern (int fd) 1052fd_intern (int fd)
680{ 1053{
681#ifdef _WIN32 1054#ifdef _WIN32
682 int arg = 1; 1055 unsigned long arg = 1;
683 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1056 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
684#else 1057#else
685 fcntl (fd, F_SETFD, FD_CLOEXEC); 1058 fcntl (fd, F_SETFD, FD_CLOEXEC);
686 fcntl (fd, F_SETFL, O_NONBLOCK); 1059 fcntl (fd, F_SETFL, O_NONBLOCK);
687#endif 1060#endif
688} 1061}
689 1062
1063static void noinline
1064evpipe_init (EV_P)
1065{
1066 if (!ev_is_active (&pipe_w))
1067 {
1068#if EV_USE_EVENTFD
1069 if ((evfd = eventfd (0, 0)) >= 0)
1070 {
1071 evpipe [0] = -1;
1072 fd_intern (evfd);
1073 ev_io_set (&pipe_w, evfd, EV_READ);
1074 }
1075 else
1076#endif
1077 {
1078 while (pipe (evpipe))
1079 ev_syserr ("(libev) error creating signal/async pipe");
1080
1081 fd_intern (evpipe [0]);
1082 fd_intern (evpipe [1]);
1083 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1084 }
1085
1086 ev_io_start (EV_A_ &pipe_w);
1087 ev_unref (EV_A); /* watcher should not keep loop alive */
1088 }
1089}
1090
1091inline_size void
1092evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093{
1094 if (!*flag)
1095 {
1096 int old_errno = errno; /* save errno because write might clobber it */
1097
1098 *flag = 1;
1099
1100#if EV_USE_EVENTFD
1101 if (evfd >= 0)
1102 {
1103 uint64_t counter = 1;
1104 write (evfd, &counter, sizeof (uint64_t));
1105 }
1106 else
1107#endif
1108 write (evpipe [1], &old_errno, 1);
1109
1110 errno = old_errno;
1111 }
1112}
1113
1114/* called whenever the libev signal pipe */
1115/* got some events (signal, async) */
690static void 1116static void
691siginit (EV_P) 1117pipecb (EV_P_ ev_io *iow, int revents)
692{ 1118{
693 fd_intern (sigpipe [0]); 1119#if EV_USE_EVENTFD
694 fd_intern (sigpipe [1]); 1120 if (evfd >= 0)
1121 {
1122 uint64_t counter;
1123 read (evfd, &counter, sizeof (uint64_t));
1124 }
1125 else
1126#endif
1127 {
1128 char dummy;
1129 read (evpipe [0], &dummy, 1);
1130 }
695 1131
696 ev_io_set (&sigev, sigpipe [0], EV_READ); 1132 if (gotsig && ev_is_default_loop (EV_A))
697 ev_io_start (EV_A_ &sigev); 1133 {
698 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1134 int signum;
1135 gotsig = 0;
1136
1137 for (signum = signalmax; signum--; )
1138 if (signals [signum].gotsig)
1139 ev_feed_signal_event (EV_A_ signum + 1);
1140 }
1141
1142#if EV_ASYNC_ENABLE
1143 if (gotasync)
1144 {
1145 int i;
1146 gotasync = 0;
1147
1148 for (i = asynccnt; i--; )
1149 if (asyncs [i]->sent)
1150 {
1151 asyncs [i]->sent = 0;
1152 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1153 }
1154 }
1155#endif
699} 1156}
700 1157
701/*****************************************************************************/ 1158/*****************************************************************************/
702 1159
1160static void
1161ev_sighandler (int signum)
1162{
1163#if EV_MULTIPLICITY
1164 struct ev_loop *loop = &default_loop_struct;
1165#endif
1166
1167#if _WIN32
1168 signal (signum, ev_sighandler);
1169#endif
1170
1171 signals [signum - 1].gotsig = 1;
1172 evpipe_write (EV_A_ &gotsig);
1173}
1174
1175void noinline
1176ev_feed_signal_event (EV_P_ int signum)
1177{
1178 WL w;
1179
1180#if EV_MULTIPLICITY
1181 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1182#endif
1183
1184 --signum;
1185
1186 if (signum < 0 || signum >= signalmax)
1187 return;
1188
1189 signals [signum].gotsig = 0;
1190
1191 for (w = signals [signum].head; w; w = w->next)
1192 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1193}
1194
1195/*****************************************************************************/
1196
703static ev_child *childs [PID_HASHSIZE]; 1197static WL childs [EV_PID_HASHSIZE];
704 1198
705#ifndef _WIN32 1199#ifndef _WIN32
706 1200
707static ev_signal childev; 1201static ev_signal childev;
1202
1203#ifndef WIFCONTINUED
1204# define WIFCONTINUED(status) 0
1205#endif
1206
1207/* handle a single child status event */
1208inline_speed void
1209child_reap (EV_P_ int chain, int pid, int status)
1210{
1211 ev_child *w;
1212 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1213
1214 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1215 {
1216 if ((w->pid == pid || !w->pid)
1217 && (!traced || (w->flags & 1)))
1218 {
1219 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1220 w->rpid = pid;
1221 w->rstatus = status;
1222 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1223 }
1224 }
1225}
708 1226
709#ifndef WCONTINUED 1227#ifndef WCONTINUED
710# define WCONTINUED 0 1228# define WCONTINUED 0
711#endif 1229#endif
712 1230
713static void 1231/* called on sigchld etc., calls waitpid */
714child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
715{
716 ev_child *w;
717
718 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
719 if (w->pid == pid || !w->pid)
720 {
721 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
722 w->rpid = pid;
723 w->rstatus = status;
724 ev_feed_event (EV_A_ (W)w, EV_CHILD);
725 }
726}
727
728static void 1232static void
729childcb (EV_P_ ev_signal *sw, int revents) 1233childcb (EV_P_ ev_signal *sw, int revents)
730{ 1234{
731 int pid, status; 1235 int pid, status;
732 1236
1237 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
733 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1238 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
734 { 1239 if (!WCONTINUED
1240 || errno != EINVAL
1241 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1242 return;
1243
735 /* make sure we are called again until all childs have been reaped */ 1244 /* make sure we are called again until all children have been reaped */
736 /* we need to do it this way so that the callback gets called before we continue */ 1245 /* we need to do it this way so that the callback gets called before we continue */
737 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1246 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
738 1247
739 child_reap (EV_A_ sw, pid, pid, status); 1248 child_reap (EV_A_ pid, pid, status);
1249 if (EV_PID_HASHSIZE > 1)
740 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1250 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
741 }
742} 1251}
743 1252
744#endif 1253#endif
745 1254
746/*****************************************************************************/ 1255/*****************************************************************************/
… …
772{ 1281{
773 return EV_VERSION_MINOR; 1282 return EV_VERSION_MINOR;
774} 1283}
775 1284
776/* return true if we are running with elevated privileges and should ignore env variables */ 1285/* return true if we are running with elevated privileges and should ignore env variables */
777static int 1286int inline_size
778enable_secure (void) 1287enable_secure (void)
779{ 1288{
780#ifdef _WIN32 1289#ifdef _WIN32
781 return 0; 1290 return 0;
782#else 1291#else
… …
808 /* kqueue is borked on everything but netbsd apparently */ 1317 /* kqueue is borked on everything but netbsd apparently */
809 /* it usually doesn't work correctly on anything but sockets and pipes */ 1318 /* it usually doesn't work correctly on anything but sockets and pipes */
810 flags &= ~EVBACKEND_KQUEUE; 1319 flags &= ~EVBACKEND_KQUEUE;
811#endif 1320#endif
812#ifdef __APPLE__ 1321#ifdef __APPLE__
813 // flags &= ~EVBACKEND_KQUEUE; for documentation 1322 /* only select works correctly on that "unix-certified" platform */
814 flags &= ~EVBACKEND_POLL; 1323 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1324 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
815#endif 1325#endif
816 1326
817 return flags; 1327 return flags;
818} 1328}
819 1329
820unsigned int 1330unsigned int
821ev_embeddable_backends (void) 1331ev_embeddable_backends (void)
822{ 1332{
823 return EVBACKEND_EPOLL 1333 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
824 | EVBACKEND_KQUEUE 1334
825 | EVBACKEND_PORT; 1335 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1336 /* please fix it and tell me how to detect the fix */
1337 flags &= ~EVBACKEND_EPOLL;
1338
1339 return flags;
826} 1340}
827 1341
828unsigned int 1342unsigned int
829ev_backend (EV_P) 1343ev_backend (EV_P)
830{ 1344{
831 return backend; 1345 return backend;
832} 1346}
833 1347
834static void 1348unsigned int
1349ev_loop_count (EV_P)
1350{
1351 return loop_count;
1352}
1353
1354void
1355ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356{
1357 io_blocktime = interval;
1358}
1359
1360void
1361ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362{
1363 timeout_blocktime = interval;
1364}
1365
1366/* initialise a loop structure, must be zero-initialised */
1367static void noinline
835loop_init (EV_P_ unsigned int flags) 1368loop_init (EV_P_ unsigned int flags)
836{ 1369{
837 if (!backend) 1370 if (!backend)
838 { 1371 {
1372#if EV_USE_REALTIME
1373 if (!have_realtime)
1374 {
1375 struct timespec ts;
1376
1377 if (!clock_gettime (CLOCK_REALTIME, &ts))
1378 have_realtime = 1;
1379 }
1380#endif
1381
839#if EV_USE_MONOTONIC 1382#if EV_USE_MONOTONIC
1383 if (!have_monotonic)
840 { 1384 {
841 struct timespec ts; 1385 struct timespec ts;
1386
842 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1387 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
843 have_monotonic = 1; 1388 have_monotonic = 1;
844 } 1389 }
845#endif 1390#endif
846 1391
847 ev_rt_now = ev_time (); 1392 ev_rt_now = ev_time ();
848 mn_now = get_clock (); 1393 mn_now = get_clock ();
849 now_floor = mn_now; 1394 now_floor = mn_now;
850 rtmn_diff = ev_rt_now - mn_now; 1395 rtmn_diff = ev_rt_now - mn_now;
1396
1397 io_blocktime = 0.;
1398 timeout_blocktime = 0.;
1399 backend = 0;
1400 backend_fd = -1;
1401 gotasync = 0;
1402#if EV_USE_INOTIFY
1403 fs_fd = -2;
1404#endif
1405
1406 /* pid check not overridable via env */
1407#ifndef _WIN32
1408 if (flags & EVFLAG_FORKCHECK)
1409 curpid = getpid ();
1410#endif
851 1411
852 if (!(flags & EVFLAG_NOENV) 1412 if (!(flags & EVFLAG_NOENV)
853 && !enable_secure () 1413 && !enable_secure ()
854 && getenv ("LIBEV_FLAGS")) 1414 && getenv ("LIBEV_FLAGS"))
855 flags = atoi (getenv ("LIBEV_FLAGS")); 1415 flags = atoi (getenv ("LIBEV_FLAGS"));
856 1416
857 if (!(flags & 0x0000ffffUL)) 1417 if (!(flags & 0x0000ffffU))
858 flags |= ev_recommended_backends (); 1418 flags |= ev_recommended_backends ();
859 1419
860 backend = 0;
861#if EV_USE_PORT 1420#if EV_USE_PORT
862 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1421 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
863#endif 1422#endif
864#if EV_USE_KQUEUE 1423#if EV_USE_KQUEUE
865 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1424 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
872#endif 1431#endif
873#if EV_USE_SELECT 1432#if EV_USE_SELECT
874 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1433 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
875#endif 1434#endif
876 1435
1436 ev_prepare_init (&pending_w, pendingcb);
1437
877 ev_init (&sigev, sigcb); 1438 ev_init (&pipe_w, pipecb);
878 ev_set_priority (&sigev, EV_MAXPRI); 1439 ev_set_priority (&pipe_w, EV_MAXPRI);
879 } 1440 }
880} 1441}
881 1442
882static void 1443/* free up a loop structure */
1444static void noinline
883loop_destroy (EV_P) 1445loop_destroy (EV_P)
884{ 1446{
885 int i; 1447 int i;
1448
1449 if (ev_is_active (&pipe_w))
1450 {
1451 ev_ref (EV_A); /* signal watcher */
1452 ev_io_stop (EV_A_ &pipe_w);
1453
1454#if EV_USE_EVENTFD
1455 if (evfd >= 0)
1456 close (evfd);
1457#endif
1458
1459 if (evpipe [0] >= 0)
1460 {
1461 close (evpipe [0]);
1462 close (evpipe [1]);
1463 }
1464 }
1465
1466#if EV_USE_INOTIFY
1467 if (fs_fd >= 0)
1468 close (fs_fd);
1469#endif
1470
1471 if (backend_fd >= 0)
1472 close (backend_fd);
886 1473
887#if EV_USE_PORT 1474#if EV_USE_PORT
888 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1475 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
889#endif 1476#endif
890#if EV_USE_KQUEUE 1477#if EV_USE_KQUEUE
… …
899#if EV_USE_SELECT 1486#if EV_USE_SELECT
900 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1487 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
901#endif 1488#endif
902 1489
903 for (i = NUMPRI; i--; ) 1490 for (i = NUMPRI; i--; )
1491 {
904 array_free (pending, [i]); 1492 array_free (pending, [i]);
1493#if EV_IDLE_ENABLE
1494 array_free (idle, [i]);
1495#endif
1496 }
1497
1498 ev_free (anfds); anfdmax = 0;
905 1499
906 /* have to use the microsoft-never-gets-it-right macro */ 1500 /* have to use the microsoft-never-gets-it-right macro */
1501 array_free (rfeed, EMPTY);
907 array_free (fdchange, EMPTY0); 1502 array_free (fdchange, EMPTY);
908 array_free (timer, EMPTY0); 1503 array_free (timer, EMPTY);
909#if EV_PERIODICS 1504#if EV_PERIODIC_ENABLE
910 array_free (periodic, EMPTY0); 1505 array_free (periodic, EMPTY);
911#endif 1506#endif
1507#if EV_FORK_ENABLE
912 array_free (idle, EMPTY0); 1508 array_free (fork, EMPTY);
1509#endif
913 array_free (prepare, EMPTY0); 1510 array_free (prepare, EMPTY);
914 array_free (check, EMPTY0); 1511 array_free (check, EMPTY);
1512#if EV_ASYNC_ENABLE
1513 array_free (async, EMPTY);
1514#endif
915 1515
916 backend = 0; 1516 backend = 0;
917} 1517}
918 1518
919static void 1519#if EV_USE_INOTIFY
1520inline_size void infy_fork (EV_P);
1521#endif
1522
1523inline_size void
920loop_fork (EV_P) 1524loop_fork (EV_P)
921{ 1525{
922#if EV_USE_PORT 1526#if EV_USE_PORT
923 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1527 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
924#endif 1528#endif
… …
926 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1530 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
927#endif 1531#endif
928#if EV_USE_EPOLL 1532#if EV_USE_EPOLL
929 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1533 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
930#endif 1534#endif
1535#if EV_USE_INOTIFY
1536 infy_fork (EV_A);
1537#endif
931 1538
932 if (ev_is_active (&sigev)) 1539 if (ev_is_active (&pipe_w))
933 { 1540 {
934 /* default loop */ 1541 /* this "locks" the handlers against writing to the pipe */
1542 /* while we modify the fd vars */
1543 gotsig = 1;
1544#if EV_ASYNC_ENABLE
1545 gotasync = 1;
1546#endif
935 1547
936 ev_ref (EV_A); 1548 ev_ref (EV_A);
937 ev_io_stop (EV_A_ &sigev); 1549 ev_io_stop (EV_A_ &pipe_w);
1550
1551#if EV_USE_EVENTFD
1552 if (evfd >= 0)
1553 close (evfd);
1554#endif
1555
1556 if (evpipe [0] >= 0)
1557 {
938 close (sigpipe [0]); 1558 close (evpipe [0]);
939 close (sigpipe [1]); 1559 close (evpipe [1]);
1560 }
940 1561
941 while (pipe (sigpipe))
942 syserr ("(libev) error creating pipe");
943
944 siginit (EV_A); 1562 evpipe_init (EV_A);
1563 /* now iterate over everything, in case we missed something */
1564 pipecb (EV_A_ &pipe_w, EV_READ);
945 } 1565 }
946 1566
947 postfork = 0; 1567 postfork = 0;
948} 1568}
949 1569
950#if EV_MULTIPLICITY 1570#if EV_MULTIPLICITY
1571
951struct ev_loop * 1572struct ev_loop *
952ev_loop_new (unsigned int flags) 1573ev_loop_new (unsigned int flags)
953{ 1574{
954 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1575 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
955 1576
… …
971} 1592}
972 1593
973void 1594void
974ev_loop_fork (EV_P) 1595ev_loop_fork (EV_P)
975{ 1596{
976 postfork = 1; 1597 postfork = 1; /* must be in line with ev_default_fork */
977} 1598}
978 1599
1600#if EV_VERIFY
1601static void noinline
1602verify_watcher (EV_P_ W w)
1603{
1604 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1605
1606 if (w->pending)
1607 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1608}
1609
1610static void noinline
1611verify_heap (EV_P_ ANHE *heap, int N)
1612{
1613 int i;
1614
1615 for (i = HEAP0; i < N + HEAP0; ++i)
1616 {
1617 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1618 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1619 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1620
1621 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1622 }
1623}
1624
1625static void noinline
1626array_verify (EV_P_ W *ws, int cnt)
1627{
1628 while (cnt--)
1629 {
1630 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1631 verify_watcher (EV_A_ ws [cnt]);
1632 }
1633}
1634#endif
1635
1636void
1637ev_loop_verify (EV_P)
1638{
1639#if EV_VERIFY
1640 int i;
1641 WL w;
1642
1643 assert (activecnt >= -1);
1644
1645 assert (fdchangemax >= fdchangecnt);
1646 for (i = 0; i < fdchangecnt; ++i)
1647 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1648
1649 assert (anfdmax >= 0);
1650 for (i = 0; i < anfdmax; ++i)
1651 for (w = anfds [i].head; w; w = w->next)
1652 {
1653 verify_watcher (EV_A_ (W)w);
1654 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1655 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1656 }
1657
1658 assert (timermax >= timercnt);
1659 verify_heap (EV_A_ timers, timercnt);
1660
1661#if EV_PERIODIC_ENABLE
1662 assert (periodicmax >= periodiccnt);
1663 verify_heap (EV_A_ periodics, periodiccnt);
1664#endif
1665
1666 for (i = NUMPRI; i--; )
1667 {
1668 assert (pendingmax [i] >= pendingcnt [i]);
1669#if EV_IDLE_ENABLE
1670 assert (idleall >= 0);
1671 assert (idlemax [i] >= idlecnt [i]);
1672 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1673#endif
1674 }
1675
1676#if EV_FORK_ENABLE
1677 assert (forkmax >= forkcnt);
1678 array_verify (EV_A_ (W *)forks, forkcnt);
1679#endif
1680
1681#if EV_ASYNC_ENABLE
1682 assert (asyncmax >= asynccnt);
1683 array_verify (EV_A_ (W *)asyncs, asynccnt);
1684#endif
1685
1686 assert (preparemax >= preparecnt);
1687 array_verify (EV_A_ (W *)prepares, preparecnt);
1688
1689 assert (checkmax >= checkcnt);
1690 array_verify (EV_A_ (W *)checks, checkcnt);
1691
1692# if 0
1693 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1694 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
979#endif 1695# endif
1696#endif
1697}
1698
1699#endif /* multiplicity */
980 1700
981#if EV_MULTIPLICITY 1701#if EV_MULTIPLICITY
982struct ev_loop * 1702struct ev_loop *
983ev_default_loop_init (unsigned int flags) 1703ev_default_loop_init (unsigned int flags)
984#else 1704#else
985int 1705int
986ev_default_loop (unsigned int flags) 1706ev_default_loop (unsigned int flags)
987#endif 1707#endif
988{ 1708{
989 if (sigpipe [0] == sigpipe [1])
990 if (pipe (sigpipe))
991 return 0;
992
993 if (!ev_default_loop_ptr) 1709 if (!ev_default_loop_ptr)
994 { 1710 {
995#if EV_MULTIPLICITY 1711#if EV_MULTIPLICITY
996 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1712 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
997#else 1713#else
… …
1000 1716
1001 loop_init (EV_A_ flags); 1717 loop_init (EV_A_ flags);
1002 1718
1003 if (ev_backend (EV_A)) 1719 if (ev_backend (EV_A))
1004 { 1720 {
1005 siginit (EV_A);
1006
1007#ifndef _WIN32 1721#ifndef _WIN32
1008 ev_signal_init (&childev, childcb, SIGCHLD); 1722 ev_signal_init (&childev, childcb, SIGCHLD);
1009 ev_set_priority (&childev, EV_MAXPRI); 1723 ev_set_priority (&childev, EV_MAXPRI);
1010 ev_signal_start (EV_A_ &childev); 1724 ev_signal_start (EV_A_ &childev);
1011 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1725 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1023{ 1737{
1024#if EV_MULTIPLICITY 1738#if EV_MULTIPLICITY
1025 struct ev_loop *loop = ev_default_loop_ptr; 1739 struct ev_loop *loop = ev_default_loop_ptr;
1026#endif 1740#endif
1027 1741
1742 ev_default_loop_ptr = 0;
1743
1028#ifndef _WIN32 1744#ifndef _WIN32
1029 ev_ref (EV_A); /* child watcher */ 1745 ev_ref (EV_A); /* child watcher */
1030 ev_signal_stop (EV_A_ &childev); 1746 ev_signal_stop (EV_A_ &childev);
1031#endif 1747#endif
1032 1748
1033 ev_ref (EV_A); /* signal watcher */
1034 ev_io_stop (EV_A_ &sigev);
1035
1036 close (sigpipe [0]); sigpipe [0] = 0;
1037 close (sigpipe [1]); sigpipe [1] = 0;
1038
1039 loop_destroy (EV_A); 1749 loop_destroy (EV_A);
1040} 1750}
1041 1751
1042void 1752void
1043ev_default_fork (void) 1753ev_default_fork (void)
1044{ 1754{
1045#if EV_MULTIPLICITY 1755#if EV_MULTIPLICITY
1046 struct ev_loop *loop = ev_default_loop_ptr; 1756 struct ev_loop *loop = ev_default_loop_ptr;
1047#endif 1757#endif
1048 1758
1049 if (backend) 1759 postfork = 1; /* must be in line with ev_loop_fork */
1050 postfork = 1;
1051} 1760}
1052 1761
1053/*****************************************************************************/ 1762/*****************************************************************************/
1054 1763
1055static int 1764void
1056any_pending (EV_P) 1765ev_invoke (EV_P_ void *w, int revents)
1057{ 1766{
1058 int pri; 1767 EV_CB_INVOKE ((W)w, revents);
1059
1060 for (pri = NUMPRI; pri--; )
1061 if (pendingcnt [pri])
1062 return 1;
1063
1064 return 0;
1065} 1768}
1066 1769
1067inline void 1770inline_speed void
1068call_pending (EV_P) 1771call_pending (EV_P)
1069{ 1772{
1070 int pri; 1773 int pri;
1071 1774
1072 for (pri = NUMPRI; pri--; ) 1775 for (pri = NUMPRI; pri--; )
1073 while (pendingcnt [pri]) 1776 while (pendingcnt [pri])
1074 { 1777 {
1075 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1778 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1076 1779
1077 if (expect_true (p->w)) 1780 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1078 { 1781 /* ^ this is no longer true, as pending_w could be here */
1782
1079 p->w->pending = 0; 1783 p->w->pending = 0;
1080 EV_CB_INVOKE (p->w, p->events); 1784 EV_CB_INVOKE (p->w, p->events);
1081 } 1785 EV_FREQUENT_CHECK;
1082 } 1786 }
1083} 1787}
1084 1788
1789#if EV_IDLE_ENABLE
1790/* make idle watchers pending. this handles the "call-idle */
1791/* only when higher priorities are idle" logic */
1085inline void 1792inline_size void
1793idle_reify (EV_P)
1794{
1795 if (expect_false (idleall))
1796 {
1797 int pri;
1798
1799 for (pri = NUMPRI; pri--; )
1800 {
1801 if (pendingcnt [pri])
1802 break;
1803
1804 if (idlecnt [pri])
1805 {
1806 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1807 break;
1808 }
1809 }
1810 }
1811}
1812#endif
1813
1814/* make timers pending */
1815inline_size void
1086timers_reify (EV_P) 1816timers_reify (EV_P)
1087{ 1817{
1818 EV_FREQUENT_CHECK;
1819
1088 while (timercnt && ((WT)timers [0])->at <= mn_now) 1820 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1089 { 1821 {
1090 ev_timer *w = timers [0]; 1822 do
1091
1092 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1093
1094 /* first reschedule or stop timer */
1095 if (w->repeat)
1096 { 1823 {
1824 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1825
1826 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1827
1828 /* first reschedule or stop timer */
1829 if (w->repeat)
1830 {
1831 ev_at (w) += w->repeat;
1832 if (ev_at (w) < mn_now)
1833 ev_at (w) = mn_now;
1834
1097 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1835 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1098 1836
1099 ((WT)w)->at += w->repeat; 1837 ANHE_at_cache (timers [HEAP0]);
1100 if (((WT)w)->at < mn_now)
1101 ((WT)w)->at = mn_now;
1102
1103 downheap ((WT *)timers, timercnt, 0); 1838 downheap (timers, timercnt, HEAP0);
1839 }
1840 else
1841 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1842
1843 EV_FREQUENT_CHECK;
1844 feed_reverse (EV_A_ (W)w);
1104 } 1845 }
1105 else 1846 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1106 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1107 1847
1108 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1848 feed_reverse_done (EV_A_ EV_TIMEOUT);
1109 } 1849 }
1110} 1850}
1111 1851
1112#if EV_PERIODICS 1852#if EV_PERIODIC_ENABLE
1853/* make periodics pending */
1113inline void 1854inline_size void
1114periodics_reify (EV_P) 1855periodics_reify (EV_P)
1115{ 1856{
1857 EV_FREQUENT_CHECK;
1858
1116 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1859 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1117 { 1860 {
1118 ev_periodic *w = periodics [0]; 1861 int feed_count = 0;
1119 1862
1863 do
1864 {
1865 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1866
1120 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1867 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1121 1868
1122 /* first reschedule or stop timer */ 1869 /* first reschedule or stop timer */
1870 if (w->reschedule_cb)
1871 {
1872 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1873
1874 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1875
1876 ANHE_at_cache (periodics [HEAP0]);
1877 downheap (periodics, periodiccnt, HEAP0);
1878 }
1879 else if (w->interval)
1880 {
1881 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1882 /* if next trigger time is not sufficiently in the future, put it there */
1883 /* this might happen because of floating point inexactness */
1884 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1885 {
1886 ev_at (w) += w->interval;
1887
1888 /* if interval is unreasonably low we might still have a time in the past */
1889 /* so correct this. this will make the periodic very inexact, but the user */
1890 /* has effectively asked to get triggered more often than possible */
1891 if (ev_at (w) < ev_rt_now)
1892 ev_at (w) = ev_rt_now;
1893 }
1894
1895 ANHE_at_cache (periodics [HEAP0]);
1896 downheap (periodics, periodiccnt, HEAP0);
1897 }
1898 else
1899 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1900
1901 EV_FREQUENT_CHECK;
1902 feed_reverse (EV_A_ (W)w);
1903 }
1904 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1905
1906 feed_reverse_done (EV_A_ EV_PERIODIC);
1907 }
1908}
1909
1910/* simply recalculate all periodics */
1911/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1912static void noinline
1913periodics_reschedule (EV_P)
1914{
1915 int i;
1916
1917 /* adjust periodics after time jump */
1918 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1919 {
1920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1921
1123 if (w->reschedule_cb) 1922 if (w->reschedule_cb)
1923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1924 else if (w->interval)
1925 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1926
1927 ANHE_at_cache (periodics [i]);
1928 }
1929
1930 reheap (periodics, periodiccnt);
1931}
1932#endif
1933
1934/* adjust all timers by a given offset */
1935static void noinline
1936timers_reschedule (EV_P_ ev_tstamp adjust)
1937{
1938 int i;
1939
1940 for (i = 0; i < timercnt; ++i)
1941 {
1942 ANHE *he = timers + i + HEAP0;
1943 ANHE_w (*he)->at += adjust;
1944 ANHE_at_cache (*he);
1945 }
1946}
1947
1948/* fetch new monotonic and realtime times from the kernel */
1949/* also detetc if there was a timejump, and act accordingly */
1950inline_speed void
1951time_update (EV_P_ ev_tstamp max_block)
1952{
1953 int i;
1954
1955#if EV_USE_MONOTONIC
1956 if (expect_true (have_monotonic))
1957 {
1958 ev_tstamp odiff = rtmn_diff;
1959
1960 mn_now = get_clock ();
1961
1962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1963 /* interpolate in the meantime */
1964 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1124 { 1965 {
1125 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1966 ev_rt_now = rtmn_diff + mn_now;
1126 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1967 return;
1127 downheap ((WT *)periodics, periodiccnt, 0);
1128 } 1968 }
1129 else if (w->interval)
1130 {
1131 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1132 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1133 downheap ((WT *)periodics, periodiccnt, 0);
1134 }
1135 else
1136 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1137 1969
1138 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1139 }
1140}
1141
1142static void
1143periodics_reschedule (EV_P)
1144{
1145 int i;
1146
1147 /* adjust periodics after time jump */
1148 for (i = 0; i < periodiccnt; ++i)
1149 {
1150 ev_periodic *w = periodics [i];
1151
1152 if (w->reschedule_cb)
1153 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1154 else if (w->interval)
1155 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1156 }
1157
1158 /* now rebuild the heap */
1159 for (i = periodiccnt >> 1; i--; )
1160 downheap ((WT *)periodics, periodiccnt, i);
1161}
1162#endif
1163
1164inline int
1165time_update_monotonic (EV_P)
1166{
1167 mn_now = get_clock ();
1168
1169 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1170 {
1171 ev_rt_now = rtmn_diff + mn_now;
1172 return 0;
1173 }
1174 else
1175 {
1176 now_floor = mn_now; 1970 now_floor = mn_now;
1177 ev_rt_now = ev_time (); 1971 ev_rt_now = ev_time ();
1178 return 1;
1179 }
1180}
1181 1972
1182inline void 1973 /* loop a few times, before making important decisions.
1183time_update (EV_P) 1974 * on the choice of "4": one iteration isn't enough,
1184{ 1975 * in case we get preempted during the calls to
1185 int i; 1976 * ev_time and get_clock. a second call is almost guaranteed
1186 1977 * to succeed in that case, though. and looping a few more times
1187#if EV_USE_MONOTONIC 1978 * doesn't hurt either as we only do this on time-jumps or
1188 if (expect_true (have_monotonic)) 1979 * in the unlikely event of having been preempted here.
1189 { 1980 */
1190 if (time_update_monotonic (EV_A)) 1981 for (i = 4; --i; )
1191 { 1982 {
1192 ev_tstamp odiff = rtmn_diff;
1193
1194 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1195 {
1196 rtmn_diff = ev_rt_now - mn_now; 1983 rtmn_diff = ev_rt_now - mn_now;
1197 1984
1198 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1985 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1199 return; /* all is well */ 1986 return; /* all is well */
1200 1987
1201 ev_rt_now = ev_time (); 1988 ev_rt_now = ev_time ();
1202 mn_now = get_clock (); 1989 mn_now = get_clock ();
1203 now_floor = mn_now; 1990 now_floor = mn_now;
1204 } 1991 }
1205 1992
1993 /* no timer adjustment, as the monotonic clock doesn't jump */
1994 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1206# if EV_PERIODICS 1995# if EV_PERIODIC_ENABLE
1996 periodics_reschedule (EV_A);
1997# endif
1998 }
1999 else
2000#endif
2001 {
2002 ev_rt_now = ev_time ();
2003
2004 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2005 {
2006 /* adjust timers. this is easy, as the offset is the same for all of them */
2007 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2008#if EV_PERIODIC_ENABLE
1207 periodics_reschedule (EV_A); 2009 periodics_reschedule (EV_A);
1208# endif 2010#endif
1209 /* no timer adjustment, as the monotonic clock doesn't jump */
1210 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1211 } 2011 }
1212 }
1213 else
1214#endif
1215 {
1216 ev_rt_now = ev_time ();
1217
1218 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1219 {
1220#if EV_PERIODICS
1221 periodics_reschedule (EV_A);
1222#endif
1223
1224 /* adjust timers. this is easy, as the offset is the same for all */
1225 for (i = 0; i < timercnt; ++i)
1226 ((WT)timers [i])->at += ev_rt_now - mn_now;
1227 }
1228 2012
1229 mn_now = ev_rt_now; 2013 mn_now = ev_rt_now;
1230 } 2014 }
1231} 2015}
1232 2016
1233void
1234ev_ref (EV_P)
1235{
1236 ++activecnt;
1237}
1238
1239void
1240ev_unref (EV_P)
1241{
1242 --activecnt;
1243}
1244
1245static int loop_done; 2017static int loop_done;
1246 2018
1247void 2019void
1248ev_loop (EV_P_ int flags) 2020ev_loop (EV_P_ int flags)
1249{ 2021{
1250 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2022 loop_done = EVUNLOOP_CANCEL;
1251 ? EVUNLOOP_ONE
1252 : EVUNLOOP_CANCEL;
1253 2023
1254 while (activecnt) 2024 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
2025
2026 do
1255 { 2027 {
2028#if EV_VERIFY >= 2
2029 ev_loop_verify (EV_A);
2030#endif
2031
2032#ifndef _WIN32
2033 if (expect_false (curpid)) /* penalise the forking check even more */
2034 if (expect_false (getpid () != curpid))
2035 {
2036 curpid = getpid ();
2037 postfork = 1;
2038 }
2039#endif
2040
2041#if EV_FORK_ENABLE
2042 /* we might have forked, so queue fork handlers */
2043 if (expect_false (postfork))
2044 if (forkcnt)
2045 {
2046 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2047 call_pending (EV_A);
2048 }
2049#endif
2050
1256 /* queue check watchers (and execute them) */ 2051 /* queue prepare watchers (and execute them) */
1257 if (expect_false (preparecnt)) 2052 if (expect_false (preparecnt))
1258 { 2053 {
1259 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2054 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1260 call_pending (EV_A); 2055 call_pending (EV_A);
1261 } 2056 }
… …
1267 /* update fd-related kernel structures */ 2062 /* update fd-related kernel structures */
1268 fd_reify (EV_A); 2063 fd_reify (EV_A);
1269 2064
1270 /* calculate blocking time */ 2065 /* calculate blocking time */
1271 { 2066 {
1272 double block; 2067 ev_tstamp waittime = 0.;
2068 ev_tstamp sleeptime = 0.;
1273 2069
1274 if (flags & EVLOOP_NONBLOCK || idlecnt) 2070 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1275 block = 0.; /* do not block at all */
1276 else
1277 { 2071 {
1278 /* update time to cancel out callback processing overhead */ 2072 /* update time to cancel out callback processing overhead */
1279#if EV_USE_MONOTONIC
1280 if (expect_true (have_monotonic))
1281 time_update_monotonic (EV_A); 2073 time_update (EV_A_ 1e100);
1282 else
1283#endif
1284 {
1285 ev_rt_now = ev_time ();
1286 mn_now = ev_rt_now;
1287 }
1288 2074
1289 block = MAX_BLOCKTIME; 2075 waittime = MAX_BLOCKTIME;
1290 2076
1291 if (timercnt) 2077 if (timercnt)
1292 { 2078 {
1293 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2079 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1294 if (block > to) block = to; 2080 if (waittime > to) waittime = to;
1295 } 2081 }
1296 2082
1297#if EV_PERIODICS 2083#if EV_PERIODIC_ENABLE
1298 if (periodiccnt) 2084 if (periodiccnt)
1299 { 2085 {
1300 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2086 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1301 if (block > to) block = to; 2087 if (waittime > to) waittime = to;
1302 } 2088 }
1303#endif 2089#endif
1304 2090
1305 if (expect_false (block < 0.)) block = 0.; 2091 if (expect_false (waittime < timeout_blocktime))
2092 waittime = timeout_blocktime;
2093
2094 sleeptime = waittime - backend_fudge;
2095
2096 if (expect_true (sleeptime > io_blocktime))
2097 sleeptime = io_blocktime;
2098
2099 if (sleeptime)
2100 {
2101 ev_sleep (sleeptime);
2102 waittime -= sleeptime;
2103 }
1306 } 2104 }
1307 2105
2106 ++loop_count;
1308 backend_poll (EV_A_ block); 2107 backend_poll (EV_A_ waittime);
2108
2109 /* update ev_rt_now, do magic */
2110 time_update (EV_A_ waittime + sleeptime);
1309 } 2111 }
1310
1311 /* update ev_rt_now, do magic */
1312 time_update (EV_A);
1313 2112
1314 /* queue pending timers and reschedule them */ 2113 /* queue pending timers and reschedule them */
1315 timers_reify (EV_A); /* relative timers called last */ 2114 timers_reify (EV_A); /* relative timers called last */
1316#if EV_PERIODICS 2115#if EV_PERIODIC_ENABLE
1317 periodics_reify (EV_A); /* absolute timers called first */ 2116 periodics_reify (EV_A); /* absolute timers called first */
1318#endif 2117#endif
1319 2118
2119#if EV_IDLE_ENABLE
1320 /* queue idle watchers unless other events are pending */ 2120 /* queue idle watchers unless other events are pending */
1321 if (idlecnt && !any_pending (EV_A)) 2121 idle_reify (EV_A);
1322 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2122#endif
1323 2123
1324 /* queue check watchers, to be executed first */ 2124 /* queue check watchers, to be executed first */
1325 if (expect_false (checkcnt)) 2125 if (expect_false (checkcnt))
1326 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2126 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1327 2127
1328 call_pending (EV_A); 2128 call_pending (EV_A);
1329
1330 if (expect_false (loop_done))
1331 break;
1332 } 2129 }
2130 while (expect_true (
2131 activecnt
2132 && !loop_done
2133 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2134 ));
1333 2135
1334 if (loop_done == EVUNLOOP_ONE) 2136 if (loop_done == EVUNLOOP_ONE)
1335 loop_done = EVUNLOOP_CANCEL; 2137 loop_done = EVUNLOOP_CANCEL;
1336} 2138}
1337 2139
… …
1339ev_unloop (EV_P_ int how) 2141ev_unloop (EV_P_ int how)
1340{ 2142{
1341 loop_done = how; 2143 loop_done = how;
1342} 2144}
1343 2145
2146void
2147ev_ref (EV_P)
2148{
2149 ++activecnt;
2150}
2151
2152void
2153ev_unref (EV_P)
2154{
2155 --activecnt;
2156}
2157
2158void
2159ev_now_update (EV_P)
2160{
2161 time_update (EV_A_ 1e100);
2162}
2163
2164void
2165ev_suspend (EV_P)
2166{
2167 ev_now_update (EV_A);
2168}
2169
2170void
2171ev_resume (EV_P)
2172{
2173 ev_tstamp mn_prev = mn_now;
2174
2175 ev_now_update (EV_A);
2176 timers_reschedule (EV_A_ mn_now - mn_prev);
2177#if EV_PERIODIC_ENABLE
2178 /* TODO: really do this? */
2179 periodics_reschedule (EV_A);
2180#endif
2181}
2182
1344/*****************************************************************************/ 2183/*****************************************************************************/
2184/* singly-linked list management, used when the expected list length is short */
1345 2185
1346inline void 2186inline_size void
1347wlist_add (WL *head, WL elem) 2187wlist_add (WL *head, WL elem)
1348{ 2188{
1349 elem->next = *head; 2189 elem->next = *head;
1350 *head = elem; 2190 *head = elem;
1351} 2191}
1352 2192
1353inline void 2193inline_size void
1354wlist_del (WL *head, WL elem) 2194wlist_del (WL *head, WL elem)
1355{ 2195{
1356 while (*head) 2196 while (*head)
1357 { 2197 {
1358 if (*head == elem) 2198 if (*head == elem)
… …
1363 2203
1364 head = &(*head)->next; 2204 head = &(*head)->next;
1365 } 2205 }
1366} 2206}
1367 2207
2208/* internal, faster, version of ev_clear_pending */
1368inline void 2209inline_speed void
1369ev_clear_pending (EV_P_ W w) 2210clear_pending (EV_P_ W w)
1370{ 2211{
1371 if (w->pending) 2212 if (w->pending)
1372 { 2213 {
1373 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2214 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1374 w->pending = 0; 2215 w->pending = 0;
1375 } 2216 }
1376} 2217}
1377 2218
2219int
2220ev_clear_pending (EV_P_ void *w)
2221{
2222 W w_ = (W)w;
2223 int pending = w_->pending;
2224
2225 if (expect_true (pending))
2226 {
2227 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2228 p->w = (W)&pending_w;
2229 w_->pending = 0;
2230 return p->events;
2231 }
2232 else
2233 return 0;
2234}
2235
1378inline void 2236inline_size void
2237pri_adjust (EV_P_ W w)
2238{
2239 int pri = w->priority;
2240 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2241 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2242 w->priority = pri;
2243}
2244
2245inline_speed void
1379ev_start (EV_P_ W w, int active) 2246ev_start (EV_P_ W w, int active)
1380{ 2247{
1381 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2248 pri_adjust (EV_A_ w);
1382 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1383
1384 w->active = active; 2249 w->active = active;
1385 ev_ref (EV_A); 2250 ev_ref (EV_A);
1386} 2251}
1387 2252
1388inline void 2253inline_size void
1389ev_stop (EV_P_ W w) 2254ev_stop (EV_P_ W w)
1390{ 2255{
1391 ev_unref (EV_A); 2256 ev_unref (EV_A);
1392 w->active = 0; 2257 w->active = 0;
1393} 2258}
1394 2259
1395/*****************************************************************************/ 2260/*****************************************************************************/
1396 2261
1397void 2262void noinline
1398ev_io_start (EV_P_ ev_io *w) 2263ev_io_start (EV_P_ ev_io *w)
1399{ 2264{
1400 int fd = w->fd; 2265 int fd = w->fd;
1401 2266
1402 if (expect_false (ev_is_active (w))) 2267 if (expect_false (ev_is_active (w)))
1403 return; 2268 return;
1404 2269
1405 assert (("ev_io_start called with negative fd", fd >= 0)); 2270 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2271 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2272
2273 EV_FREQUENT_CHECK;
1406 2274
1407 ev_start (EV_A_ (W)w, 1); 2275 ev_start (EV_A_ (W)w, 1);
1408 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2276 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1409 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2277 wlist_add (&anfds[fd].head, (WL)w);
1410 2278
1411 fd_change (EV_A_ fd); 2279 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1412} 2280 w->events &= ~EV__IOFDSET;
1413 2281
1414void 2282 EV_FREQUENT_CHECK;
2283}
2284
2285void noinline
1415ev_io_stop (EV_P_ ev_io *w) 2286ev_io_stop (EV_P_ ev_io *w)
1416{ 2287{
1417 ev_clear_pending (EV_A_ (W)w); 2288 clear_pending (EV_A_ (W)w);
1418 if (expect_false (!ev_is_active (w))) 2289 if (expect_false (!ev_is_active (w)))
1419 return; 2290 return;
1420 2291
1421 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2292 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1422 2293
2294 EV_FREQUENT_CHECK;
2295
1423 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2296 wlist_del (&anfds[w->fd].head, (WL)w);
1424 ev_stop (EV_A_ (W)w); 2297 ev_stop (EV_A_ (W)w);
1425 2298
1426 fd_change (EV_A_ w->fd); 2299 fd_change (EV_A_ w->fd, 1);
1427}
1428 2300
1429void 2301 EV_FREQUENT_CHECK;
2302}
2303
2304void noinline
1430ev_timer_start (EV_P_ ev_timer *w) 2305ev_timer_start (EV_P_ ev_timer *w)
1431{ 2306{
1432 if (expect_false (ev_is_active (w))) 2307 if (expect_false (ev_is_active (w)))
1433 return; 2308 return;
1434 2309
1435 ((WT)w)->at += mn_now; 2310 ev_at (w) += mn_now;
1436 2311
1437 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2312 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1438 2313
2314 EV_FREQUENT_CHECK;
2315
2316 ++timercnt;
1439 ev_start (EV_A_ (W)w, ++timercnt); 2317 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1440 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2318 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1441 timers [timercnt - 1] = w; 2319 ANHE_w (timers [ev_active (w)]) = (WT)w;
1442 upheap ((WT *)timers, timercnt - 1); 2320 ANHE_at_cache (timers [ev_active (w)]);
2321 upheap (timers, ev_active (w));
1443 2322
2323 EV_FREQUENT_CHECK;
2324
1444 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2325 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1445} 2326}
1446 2327
1447void 2328void noinline
1448ev_timer_stop (EV_P_ ev_timer *w) 2329ev_timer_stop (EV_P_ ev_timer *w)
1449{ 2330{
1450 ev_clear_pending (EV_A_ (W)w); 2331 clear_pending (EV_A_ (W)w);
1451 if (expect_false (!ev_is_active (w))) 2332 if (expect_false (!ev_is_active (w)))
1452 return; 2333 return;
1453 2334
2335 EV_FREQUENT_CHECK;
2336
2337 {
2338 int active = ev_active (w);
2339
1454 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2340 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1455 2341
2342 --timercnt;
2343
1456 if (expect_true (((W)w)->active < timercnt--)) 2344 if (expect_true (active < timercnt + HEAP0))
1457 { 2345 {
1458 timers [((W)w)->active - 1] = timers [timercnt]; 2346 timers [active] = timers [timercnt + HEAP0];
1459 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2347 adjustheap (timers, timercnt, active);
1460 } 2348 }
2349 }
1461 2350
1462 ((WT)w)->at -= mn_now; 2351 EV_FREQUENT_CHECK;
2352
2353 ev_at (w) -= mn_now;
1463 2354
1464 ev_stop (EV_A_ (W)w); 2355 ev_stop (EV_A_ (W)w);
1465} 2356}
1466 2357
1467void 2358void noinline
1468ev_timer_again (EV_P_ ev_timer *w) 2359ev_timer_again (EV_P_ ev_timer *w)
1469{ 2360{
2361 EV_FREQUENT_CHECK;
2362
1470 if (ev_is_active (w)) 2363 if (ev_is_active (w))
1471 { 2364 {
1472 if (w->repeat) 2365 if (w->repeat)
1473 { 2366 {
1474 ((WT)w)->at = mn_now + w->repeat; 2367 ev_at (w) = mn_now + w->repeat;
2368 ANHE_at_cache (timers [ev_active (w)]);
1475 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2369 adjustheap (timers, timercnt, ev_active (w));
1476 } 2370 }
1477 else 2371 else
1478 ev_timer_stop (EV_A_ w); 2372 ev_timer_stop (EV_A_ w);
1479 } 2373 }
1480 else if (w->repeat) 2374 else if (w->repeat)
1481 { 2375 {
1482 w->at = w->repeat; 2376 ev_at (w) = w->repeat;
1483 ev_timer_start (EV_A_ w); 2377 ev_timer_start (EV_A_ w);
1484 } 2378 }
1485}
1486 2379
2380 EV_FREQUENT_CHECK;
2381}
2382
1487#if EV_PERIODICS 2383#if EV_PERIODIC_ENABLE
1488void 2384void noinline
1489ev_periodic_start (EV_P_ ev_periodic *w) 2385ev_periodic_start (EV_P_ ev_periodic *w)
1490{ 2386{
1491 if (expect_false (ev_is_active (w))) 2387 if (expect_false (ev_is_active (w)))
1492 return; 2388 return;
1493 2389
1494 if (w->reschedule_cb) 2390 if (w->reschedule_cb)
1495 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2391 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1496 else if (w->interval) 2392 else if (w->interval)
1497 { 2393 {
1498 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2394 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1499 /* this formula differs from the one in periodic_reify because we do not always round up */ 2395 /* this formula differs from the one in periodic_reify because we do not always round up */
1500 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2396 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1501 } 2397 }
2398 else
2399 ev_at (w) = w->offset;
1502 2400
2401 EV_FREQUENT_CHECK;
2402
2403 ++periodiccnt;
1503 ev_start (EV_A_ (W)w, ++periodiccnt); 2404 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1504 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2405 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1505 periodics [periodiccnt - 1] = w; 2406 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1506 upheap ((WT *)periodics, periodiccnt - 1); 2407 ANHE_at_cache (periodics [ev_active (w)]);
2408 upheap (periodics, ev_active (w));
1507 2409
2410 EV_FREQUENT_CHECK;
2411
1508 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2412 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1509} 2413}
1510 2414
1511void 2415void noinline
1512ev_periodic_stop (EV_P_ ev_periodic *w) 2416ev_periodic_stop (EV_P_ ev_periodic *w)
1513{ 2417{
1514 ev_clear_pending (EV_A_ (W)w); 2418 clear_pending (EV_A_ (W)w);
1515 if (expect_false (!ev_is_active (w))) 2419 if (expect_false (!ev_is_active (w)))
1516 return; 2420 return;
1517 2421
2422 EV_FREQUENT_CHECK;
2423
2424 {
2425 int active = ev_active (w);
2426
1518 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2427 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1519 2428
2429 --periodiccnt;
2430
1520 if (expect_true (((W)w)->active < periodiccnt--)) 2431 if (expect_true (active < periodiccnt + HEAP0))
1521 { 2432 {
1522 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2433 periodics [active] = periodics [periodiccnt + HEAP0];
1523 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2434 adjustheap (periodics, periodiccnt, active);
1524 } 2435 }
2436 }
2437
2438 EV_FREQUENT_CHECK;
1525 2439
1526 ev_stop (EV_A_ (W)w); 2440 ev_stop (EV_A_ (W)w);
1527} 2441}
1528 2442
1529void 2443void noinline
1530ev_periodic_again (EV_P_ ev_periodic *w) 2444ev_periodic_again (EV_P_ ev_periodic *w)
1531{ 2445{
1532 /* TODO: use adjustheap and recalculation */ 2446 /* TODO: use adjustheap and recalculation */
1533 ev_periodic_stop (EV_A_ w); 2447 ev_periodic_stop (EV_A_ w);
1534 ev_periodic_start (EV_A_ w); 2448 ev_periodic_start (EV_A_ w);
1535} 2449}
1536#endif 2450#endif
1537 2451
1538void 2452#ifndef SA_RESTART
2453# define SA_RESTART 0
2454#endif
2455
2456void noinline
1539ev_idle_start (EV_P_ ev_idle *w) 2457ev_signal_start (EV_P_ ev_signal *w)
1540{ 2458{
2459#if EV_MULTIPLICITY
2460 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2461#endif
1541 if (expect_false (ev_is_active (w))) 2462 if (expect_false (ev_is_active (w)))
1542 return; 2463 return;
1543 2464
2465 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2466
2467 evpipe_init (EV_A);
2468
2469 EV_FREQUENT_CHECK;
2470
2471 {
2472#ifndef _WIN32
2473 sigset_t full, prev;
2474 sigfillset (&full);
2475 sigprocmask (SIG_SETMASK, &full, &prev);
2476#endif
2477
2478 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2479
2480#ifndef _WIN32
2481 sigprocmask (SIG_SETMASK, &prev, 0);
2482#endif
2483 }
2484
1544 ev_start (EV_A_ (W)w, ++idlecnt); 2485 ev_start (EV_A_ (W)w, 1);
1545 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2486 wlist_add (&signals [w->signum - 1].head, (WL)w);
1546 idles [idlecnt - 1] = w;
1547}
1548 2487
1549void 2488 if (!((WL)w)->next)
2489 {
2490#if _WIN32
2491 signal (w->signum, ev_sighandler);
2492#else
2493 struct sigaction sa;
2494 sa.sa_handler = ev_sighandler;
2495 sigfillset (&sa.sa_mask);
2496 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2497 sigaction (w->signum, &sa, 0);
2498#endif
2499 }
2500
2501 EV_FREQUENT_CHECK;
2502}
2503
2504void noinline
1550ev_idle_stop (EV_P_ ev_idle *w) 2505ev_signal_stop (EV_P_ ev_signal *w)
1551{ 2506{
1552 ev_clear_pending (EV_A_ (W)w); 2507 clear_pending (EV_A_ (W)w);
1553 if (expect_false (!ev_is_active (w))) 2508 if (expect_false (!ev_is_active (w)))
1554 return; 2509 return;
1555 2510
1556 idles [((W)w)->active - 1] = idles [--idlecnt]; 2511 EV_FREQUENT_CHECK;
2512
2513 wlist_del (&signals [w->signum - 1].head, (WL)w);
1557 ev_stop (EV_A_ (W)w); 2514 ev_stop (EV_A_ (W)w);
1558}
1559 2515
2516 if (!signals [w->signum - 1].head)
2517 signal (w->signum, SIG_DFL);
2518
2519 EV_FREQUENT_CHECK;
2520}
2521
1560void 2522void
1561ev_prepare_start (EV_P_ ev_prepare *w) 2523ev_child_start (EV_P_ ev_child *w)
1562{ 2524{
2525#if EV_MULTIPLICITY
2526 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2527#endif
1563 if (expect_false (ev_is_active (w))) 2528 if (expect_false (ev_is_active (w)))
1564 return; 2529 return;
2530
2531 EV_FREQUENT_CHECK;
2532
2533 ev_start (EV_A_ (W)w, 1);
2534 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2535
2536 EV_FREQUENT_CHECK;
2537}
2538
2539void
2540ev_child_stop (EV_P_ ev_child *w)
2541{
2542 clear_pending (EV_A_ (W)w);
2543 if (expect_false (!ev_is_active (w)))
2544 return;
2545
2546 EV_FREQUENT_CHECK;
2547
2548 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2549 ev_stop (EV_A_ (W)w);
2550
2551 EV_FREQUENT_CHECK;
2552}
2553
2554#if EV_STAT_ENABLE
2555
2556# ifdef _WIN32
2557# undef lstat
2558# define lstat(a,b) _stati64 (a,b)
2559# endif
2560
2561#define DEF_STAT_INTERVAL 5.0074891
2562#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2563#define MIN_STAT_INTERVAL 0.1074891
2564
2565static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2566
2567#if EV_USE_INOTIFY
2568# define EV_INOTIFY_BUFSIZE 8192
2569
2570static void noinline
2571infy_add (EV_P_ ev_stat *w)
2572{
2573 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);
2574
2575 if (w->wd < 0)
2576 {
2577 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2578 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2579
2580 /* monitor some parent directory for speedup hints */
2581 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2582 /* but an efficiency issue only */
2583 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2584 {
2585 char path [4096];
2586 strcpy (path, w->path);
2587
2588 do
2589 {
2590 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2591 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2592
2593 char *pend = strrchr (path, '/');
2594
2595 if (!pend || pend == path)
2596 break;
2597
2598 *pend = 0;
2599 w->wd = inotify_add_watch (fs_fd, path, mask);
2600 }
2601 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2602 }
2603 }
2604
2605 if (w->wd >= 0)
2606 {
2607 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2608
2609 /* now local changes will be tracked by inotify, but remote changes won't */
2610 /* unless the filesystem it known to be local, we therefore still poll */
2611 /* also do poll on <2.6.25, but with normal frequency */
2612 struct statfs sfs;
2613
2614 if (fs_2625 && !statfs (w->path, &sfs))
2615 if (sfs.f_type == 0x1373 /* devfs */
2616 || sfs.f_type == 0xEF53 /* ext2/3 */
2617 || sfs.f_type == 0x3153464a /* jfs */
2618 || sfs.f_type == 0x52654973 /* reiser3 */
2619 || sfs.f_type == 0x01021994 /* tempfs */
2620 || sfs.f_type == 0x58465342 /* xfs */)
2621 return;
2622
2623 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2624 ev_timer_again (EV_A_ &w->timer);
2625 }
2626}
2627
2628static void noinline
2629infy_del (EV_P_ ev_stat *w)
2630{
2631 int slot;
2632 int wd = w->wd;
2633
2634 if (wd < 0)
2635 return;
2636
2637 w->wd = -2;
2638 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2639 wlist_del (&fs_hash [slot].head, (WL)w);
2640
2641 /* remove this watcher, if others are watching it, they will rearm */
2642 inotify_rm_watch (fs_fd, wd);
2643}
2644
2645static void noinline
2646infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2647{
2648 if (slot < 0)
2649 /* overflow, need to check for all hash slots */
2650 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2651 infy_wd (EV_A_ slot, wd, ev);
2652 else
2653 {
2654 WL w_;
2655
2656 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2657 {
2658 ev_stat *w = (ev_stat *)w_;
2659 w_ = w_->next; /* lets us remove this watcher and all before it */
2660
2661 if (w->wd == wd || wd == -1)
2662 {
2663 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2664 {
2665 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2666 w->wd = -1;
2667 infy_add (EV_A_ w); /* re-add, no matter what */
2668 }
2669
2670 stat_timer_cb (EV_A_ &w->timer, 0);
2671 }
2672 }
2673 }
2674}
2675
2676static void
2677infy_cb (EV_P_ ev_io *w, int revents)
2678{
2679 char buf [EV_INOTIFY_BUFSIZE];
2680 struct inotify_event *ev = (struct inotify_event *)buf;
2681 int ofs;
2682 int len = read (fs_fd, buf, sizeof (buf));
2683
2684 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2685 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2686}
2687
2688inline_size void
2689check_2625 (EV_P)
2690{
2691 /* kernels < 2.6.25 are borked
2692 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2693 */
2694 struct utsname buf;
2695 int major, minor, micro;
2696
2697 if (uname (&buf))
2698 return;
2699
2700 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2701 return;
2702
2703 if (major < 2
2704 || (major == 2 && minor < 6)
2705 || (major == 2 && minor == 6 && micro < 25))
2706 return;
2707
2708 fs_2625 = 1;
2709}
2710
2711inline_size void
2712infy_init (EV_P)
2713{
2714 if (fs_fd != -2)
2715 return;
2716
2717 fs_fd = -1;
2718
2719 check_2625 (EV_A);
2720
2721 fs_fd = inotify_init ();
2722
2723 if (fs_fd >= 0)
2724 {
2725 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2726 ev_set_priority (&fs_w, EV_MAXPRI);
2727 ev_io_start (EV_A_ &fs_w);
2728 }
2729}
2730
2731inline_size void
2732infy_fork (EV_P)
2733{
2734 int slot;
2735
2736 if (fs_fd < 0)
2737 return;
2738
2739 close (fs_fd);
2740 fs_fd = inotify_init ();
2741
2742 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2743 {
2744 WL w_ = fs_hash [slot].head;
2745 fs_hash [slot].head = 0;
2746
2747 while (w_)
2748 {
2749 ev_stat *w = (ev_stat *)w_;
2750 w_ = w_->next; /* lets us add this watcher */
2751
2752 w->wd = -1;
2753
2754 if (fs_fd >= 0)
2755 infy_add (EV_A_ w); /* re-add, no matter what */
2756 else
2757 ev_timer_again (EV_A_ &w->timer);
2758 }
2759 }
2760}
2761
2762#endif
2763
2764#ifdef _WIN32
2765# define EV_LSTAT(p,b) _stati64 (p, b)
2766#else
2767# define EV_LSTAT(p,b) lstat (p, b)
2768#endif
2769
2770void
2771ev_stat_stat (EV_P_ ev_stat *w)
2772{
2773 if (lstat (w->path, &w->attr) < 0)
2774 w->attr.st_nlink = 0;
2775 else if (!w->attr.st_nlink)
2776 w->attr.st_nlink = 1;
2777}
2778
2779static void noinline
2780stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2781{
2782 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2783
2784 /* we copy this here each the time so that */
2785 /* prev has the old value when the callback gets invoked */
2786 w->prev = w->attr;
2787 ev_stat_stat (EV_A_ w);
2788
2789 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2790 if (
2791 w->prev.st_dev != w->attr.st_dev
2792 || w->prev.st_ino != w->attr.st_ino
2793 || w->prev.st_mode != w->attr.st_mode
2794 || w->prev.st_nlink != w->attr.st_nlink
2795 || w->prev.st_uid != w->attr.st_uid
2796 || w->prev.st_gid != w->attr.st_gid
2797 || w->prev.st_rdev != w->attr.st_rdev
2798 || w->prev.st_size != w->attr.st_size
2799 || w->prev.st_atime != w->attr.st_atime
2800 || w->prev.st_mtime != w->attr.st_mtime
2801 || w->prev.st_ctime != w->attr.st_ctime
2802 ) {
2803 #if EV_USE_INOTIFY
2804 if (fs_fd >= 0)
2805 {
2806 infy_del (EV_A_ w);
2807 infy_add (EV_A_ w);
2808 ev_stat_stat (EV_A_ w); /* avoid race... */
2809 }
2810 #endif
2811
2812 ev_feed_event (EV_A_ w, EV_STAT);
2813 }
2814}
2815
2816void
2817ev_stat_start (EV_P_ ev_stat *w)
2818{
2819 if (expect_false (ev_is_active (w)))
2820 return;
2821
2822 ev_stat_stat (EV_A_ w);
2823
2824 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2825 w->interval = MIN_STAT_INTERVAL;
2826
2827 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2828 ev_set_priority (&w->timer, ev_priority (w));
2829
2830#if EV_USE_INOTIFY
2831 infy_init (EV_A);
2832
2833 if (fs_fd >= 0)
2834 infy_add (EV_A_ w);
2835 else
2836#endif
2837 ev_timer_again (EV_A_ &w->timer);
2838
2839 ev_start (EV_A_ (W)w, 1);
2840
2841 EV_FREQUENT_CHECK;
2842}
2843
2844void
2845ev_stat_stop (EV_P_ ev_stat *w)
2846{
2847 clear_pending (EV_A_ (W)w);
2848 if (expect_false (!ev_is_active (w)))
2849 return;
2850
2851 EV_FREQUENT_CHECK;
2852
2853#if EV_USE_INOTIFY
2854 infy_del (EV_A_ w);
2855#endif
2856 ev_timer_stop (EV_A_ &w->timer);
2857
2858 ev_stop (EV_A_ (W)w);
2859
2860 EV_FREQUENT_CHECK;
2861}
2862#endif
2863
2864#if EV_IDLE_ENABLE
2865void
2866ev_idle_start (EV_P_ ev_idle *w)
2867{
2868 if (expect_false (ev_is_active (w)))
2869 return;
2870
2871 pri_adjust (EV_A_ (W)w);
2872
2873 EV_FREQUENT_CHECK;
2874
2875 {
2876 int active = ++idlecnt [ABSPRI (w)];
2877
2878 ++idleall;
2879 ev_start (EV_A_ (W)w, active);
2880
2881 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2882 idles [ABSPRI (w)][active - 1] = w;
2883 }
2884
2885 EV_FREQUENT_CHECK;
2886}
2887
2888void
2889ev_idle_stop (EV_P_ ev_idle *w)
2890{
2891 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w)))
2893 return;
2894
2895 EV_FREQUENT_CHECK;
2896
2897 {
2898 int active = ev_active (w);
2899
2900 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2901 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2902
2903 ev_stop (EV_A_ (W)w);
2904 --idleall;
2905 }
2906
2907 EV_FREQUENT_CHECK;
2908}
2909#endif
2910
2911void
2912ev_prepare_start (EV_P_ ev_prepare *w)
2913{
2914 if (expect_false (ev_is_active (w)))
2915 return;
2916
2917 EV_FREQUENT_CHECK;
1565 2918
1566 ev_start (EV_A_ (W)w, ++preparecnt); 2919 ev_start (EV_A_ (W)w, ++preparecnt);
1567 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2920 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1568 prepares [preparecnt - 1] = w; 2921 prepares [preparecnt - 1] = w;
2922
2923 EV_FREQUENT_CHECK;
1569} 2924}
1570 2925
1571void 2926void
1572ev_prepare_stop (EV_P_ ev_prepare *w) 2927ev_prepare_stop (EV_P_ ev_prepare *w)
1573{ 2928{
1574 ev_clear_pending (EV_A_ (W)w); 2929 clear_pending (EV_A_ (W)w);
1575 if (expect_false (!ev_is_active (w))) 2930 if (expect_false (!ev_is_active (w)))
1576 return; 2931 return;
1577 2932
2933 EV_FREQUENT_CHECK;
2934
2935 {
2936 int active = ev_active (w);
2937
1578 prepares [((W)w)->active - 1] = prepares [--preparecnt]; 2938 prepares [active - 1] = prepares [--preparecnt];
2939 ev_active (prepares [active - 1]) = active;
2940 }
2941
1579 ev_stop (EV_A_ (W)w); 2942 ev_stop (EV_A_ (W)w);
2943
2944 EV_FREQUENT_CHECK;
1580} 2945}
1581 2946
1582void 2947void
1583ev_check_start (EV_P_ ev_check *w) 2948ev_check_start (EV_P_ ev_check *w)
1584{ 2949{
1585 if (expect_false (ev_is_active (w))) 2950 if (expect_false (ev_is_active (w)))
1586 return; 2951 return;
2952
2953 EV_FREQUENT_CHECK;
1587 2954
1588 ev_start (EV_A_ (W)w, ++checkcnt); 2955 ev_start (EV_A_ (W)w, ++checkcnt);
1589 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 2956 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1590 checks [checkcnt - 1] = w; 2957 checks [checkcnt - 1] = w;
2958
2959 EV_FREQUENT_CHECK;
1591} 2960}
1592 2961
1593void 2962void
1594ev_check_stop (EV_P_ ev_check *w) 2963ev_check_stop (EV_P_ ev_check *w)
1595{ 2964{
1596 ev_clear_pending (EV_A_ (W)w); 2965 clear_pending (EV_A_ (W)w);
1597 if (expect_false (!ev_is_active (w))) 2966 if (expect_false (!ev_is_active (w)))
1598 return; 2967 return;
1599 2968
2969 EV_FREQUENT_CHECK;
2970
2971 {
2972 int active = ev_active (w);
2973
1600 checks [((W)w)->active - 1] = checks [--checkcnt]; 2974 checks [active - 1] = checks [--checkcnt];
2975 ev_active (checks [active - 1]) = active;
2976 }
2977
1601 ev_stop (EV_A_ (W)w); 2978 ev_stop (EV_A_ (W)w);
1602}
1603 2979
1604#ifndef SA_RESTART 2980 EV_FREQUENT_CHECK;
1605# define SA_RESTART 0
1606#endif
1607
1608void
1609ev_signal_start (EV_P_ ev_signal *w)
1610{
1611#if EV_MULTIPLICITY
1612 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1613#endif
1614 if (expect_false (ev_is_active (w)))
1615 return;
1616
1617 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1618
1619 ev_start (EV_A_ (W)w, 1);
1620 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1621 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1622
1623 if (!((WL)w)->next)
1624 {
1625#if _WIN32
1626 signal (w->signum, sighandler);
1627#else
1628 struct sigaction sa;
1629 sa.sa_handler = sighandler;
1630 sigfillset (&sa.sa_mask);
1631 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1632 sigaction (w->signum, &sa, 0);
1633#endif
1634 }
1635} 2981}
1636 2982
1637void 2983#if EV_EMBED_ENABLE
1638ev_signal_stop (EV_P_ ev_signal *w) 2984void noinline
1639{
1640 ev_clear_pending (EV_A_ (W)w);
1641 if (expect_false (!ev_is_active (w)))
1642 return;
1643
1644 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1645 ev_stop (EV_A_ (W)w);
1646
1647 if (!signals [w->signum - 1].head)
1648 signal (w->signum, SIG_DFL);
1649}
1650
1651void
1652ev_child_start (EV_P_ ev_child *w)
1653{
1654#if EV_MULTIPLICITY
1655 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1656#endif
1657 if (expect_false (ev_is_active (w)))
1658 return;
1659
1660 ev_start (EV_A_ (W)w, 1);
1661 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1662}
1663
1664void
1665ev_child_stop (EV_P_ ev_child *w)
1666{
1667 ev_clear_pending (EV_A_ (W)w);
1668 if (expect_false (!ev_is_active (w)))
1669 return;
1670
1671 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1672 ev_stop (EV_A_ (W)w);
1673}
1674
1675#if EV_MULTIPLICITY
1676void
1677ev_embed_loop (EV_P_ ev_embed *w) 2985ev_embed_sweep (EV_P_ ev_embed *w)
1678{ 2986{
1679 ev_loop (w->loop, EVLOOP_NONBLOCK); 2987 ev_loop (w->other, EVLOOP_NONBLOCK);
1680} 2988}
1681 2989
1682static void 2990static void
1683embed_cb (EV_P_ ev_io *io, int revents) 2991embed_io_cb (EV_P_ ev_io *io, int revents)
1684{ 2992{
1685 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2993 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1686 2994
1687 if (ev_cb (w)) 2995 if (ev_cb (w))
1688 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2996 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1689 else 2997 else
1690 ev_embed_loop (loop, w); 2998 ev_loop (w->other, EVLOOP_NONBLOCK);
1691} 2999}
3000
3001static void
3002embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3003{
3004 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3005
3006 {
3007 struct ev_loop *loop = w->other;
3008
3009 while (fdchangecnt)
3010 {
3011 fd_reify (EV_A);
3012 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3013 }
3014 }
3015}
3016
3017static void
3018embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3019{
3020 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3021
3022 ev_embed_stop (EV_A_ w);
3023
3024 {
3025 struct ev_loop *loop = w->other;
3026
3027 ev_loop_fork (EV_A);
3028 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3029 }
3030
3031 ev_embed_start (EV_A_ w);
3032}
3033
3034#if 0
3035static void
3036embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3037{
3038 ev_idle_stop (EV_A_ idle);
3039}
3040#endif
1692 3041
1693void 3042void
1694ev_embed_start (EV_P_ ev_embed *w) 3043ev_embed_start (EV_P_ ev_embed *w)
1695{ 3044{
1696 if (expect_false (ev_is_active (w))) 3045 if (expect_false (ev_is_active (w)))
1697 return; 3046 return;
1698 3047
1699 { 3048 {
1700 struct ev_loop *loop = w->loop; 3049 struct ev_loop *loop = w->other;
1701 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3050 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1702 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3051 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1703 } 3052 }
3053
3054 EV_FREQUENT_CHECK;
1704 3055
1705 ev_set_priority (&w->io, ev_priority (w)); 3056 ev_set_priority (&w->io, ev_priority (w));
1706 ev_io_start (EV_A_ &w->io); 3057 ev_io_start (EV_A_ &w->io);
3058
3059 ev_prepare_init (&w->prepare, embed_prepare_cb);
3060 ev_set_priority (&w->prepare, EV_MINPRI);
3061 ev_prepare_start (EV_A_ &w->prepare);
3062
3063 ev_fork_init (&w->fork, embed_fork_cb);
3064 ev_fork_start (EV_A_ &w->fork);
3065
3066 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3067
1707 ev_start (EV_A_ (W)w, 1); 3068 ev_start (EV_A_ (W)w, 1);
3069
3070 EV_FREQUENT_CHECK;
1708} 3071}
1709 3072
1710void 3073void
1711ev_embed_stop (EV_P_ ev_embed *w) 3074ev_embed_stop (EV_P_ ev_embed *w)
1712{ 3075{
1713 ev_clear_pending (EV_A_ (W)w); 3076 clear_pending (EV_A_ (W)w);
1714 if (expect_false (!ev_is_active (w))) 3077 if (expect_false (!ev_is_active (w)))
1715 return; 3078 return;
1716 3079
3080 EV_FREQUENT_CHECK;
3081
1717 ev_io_stop (EV_A_ &w->io); 3082 ev_io_stop (EV_A_ &w->io);
3083 ev_prepare_stop (EV_A_ &w->prepare);
3084 ev_fork_stop (EV_A_ &w->fork);
3085
3086 EV_FREQUENT_CHECK;
3087}
3088#endif
3089
3090#if EV_FORK_ENABLE
3091void
3092ev_fork_start (EV_P_ ev_fork *w)
3093{
3094 if (expect_false (ev_is_active (w)))
3095 return;
3096
3097 EV_FREQUENT_CHECK;
3098
3099 ev_start (EV_A_ (W)w, ++forkcnt);
3100 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3101 forks [forkcnt - 1] = w;
3102
3103 EV_FREQUENT_CHECK;
3104}
3105
3106void
3107ev_fork_stop (EV_P_ ev_fork *w)
3108{
3109 clear_pending (EV_A_ (W)w);
3110 if (expect_false (!ev_is_active (w)))
3111 return;
3112
3113 EV_FREQUENT_CHECK;
3114
3115 {
3116 int active = ev_active (w);
3117
3118 forks [active - 1] = forks [--forkcnt];
3119 ev_active (forks [active - 1]) = active;
3120 }
3121
1718 ev_stop (EV_A_ (W)w); 3122 ev_stop (EV_A_ (W)w);
3123
3124 EV_FREQUENT_CHECK;
3125}
3126#endif
3127
3128#if EV_ASYNC_ENABLE
3129void
3130ev_async_start (EV_P_ ev_async *w)
3131{
3132 if (expect_false (ev_is_active (w)))
3133 return;
3134
3135 evpipe_init (EV_A);
3136
3137 EV_FREQUENT_CHECK;
3138
3139 ev_start (EV_A_ (W)w, ++asynccnt);
3140 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3141 asyncs [asynccnt - 1] = w;
3142
3143 EV_FREQUENT_CHECK;
3144}
3145
3146void
3147ev_async_stop (EV_P_ ev_async *w)
3148{
3149 clear_pending (EV_A_ (W)w);
3150 if (expect_false (!ev_is_active (w)))
3151 return;
3152
3153 EV_FREQUENT_CHECK;
3154
3155 {
3156 int active = ev_active (w);
3157
3158 asyncs [active - 1] = asyncs [--asynccnt];
3159 ev_active (asyncs [active - 1]) = active;
3160 }
3161
3162 ev_stop (EV_A_ (W)w);
3163
3164 EV_FREQUENT_CHECK;
3165}
3166
3167void
3168ev_async_send (EV_P_ ev_async *w)
3169{
3170 w->sent = 1;
3171 evpipe_write (EV_A_ &gotasync);
1719} 3172}
1720#endif 3173#endif
1721 3174
1722/*****************************************************************************/ 3175/*****************************************************************************/
1723 3176
… …
1733once_cb (EV_P_ struct ev_once *once, int revents) 3186once_cb (EV_P_ struct ev_once *once, int revents)
1734{ 3187{
1735 void (*cb)(int revents, void *arg) = once->cb; 3188 void (*cb)(int revents, void *arg) = once->cb;
1736 void *arg = once->arg; 3189 void *arg = once->arg;
1737 3190
1738 ev_io_stop (EV_A_ &once->io); 3191 ev_io_stop (EV_A_ &once->io);
1739 ev_timer_stop (EV_A_ &once->to); 3192 ev_timer_stop (EV_A_ &once->to);
1740 ev_free (once); 3193 ev_free (once);
1741 3194
1742 cb (revents, arg); 3195 cb (revents, arg);
1743} 3196}
1744 3197
1745static void 3198static void
1746once_cb_io (EV_P_ ev_io *w, int revents) 3199once_cb_io (EV_P_ ev_io *w, int revents)
1747{ 3200{
1748 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3201 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3202
3203 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1749} 3204}
1750 3205
1751static void 3206static void
1752once_cb_to (EV_P_ ev_timer *w, int revents) 3207once_cb_to (EV_P_ ev_timer *w, int revents)
1753{ 3208{
1754 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3209 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3210
3211 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1755} 3212}
1756 3213
1757void 3214void
1758ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3215ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1759{ 3216{
… …
1781 ev_timer_set (&once->to, timeout, 0.); 3238 ev_timer_set (&once->to, timeout, 0.);
1782 ev_timer_start (EV_A_ &once->to); 3239 ev_timer_start (EV_A_ &once->to);
1783 } 3240 }
1784} 3241}
1785 3242
3243/*****************************************************************************/
3244
3245#if EV_WALK_ENABLE
3246void
3247ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3248{
3249 int i, j;
3250 ev_watcher_list *wl, *wn;
3251
3252 if (types & (EV_IO | EV_EMBED))
3253 for (i = 0; i < anfdmax; ++i)
3254 for (wl = anfds [i].head; wl; )
3255 {
3256 wn = wl->next;
3257
3258#if EV_EMBED_ENABLE
3259 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3260 {
3261 if (types & EV_EMBED)
3262 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3263 }
3264 else
3265#endif
3266#if EV_USE_INOTIFY
3267 if (ev_cb ((ev_io *)wl) == infy_cb)
3268 ;
3269 else
3270#endif
3271 if ((ev_io *)wl != &pipe_w)
3272 if (types & EV_IO)
3273 cb (EV_A_ EV_IO, wl);
3274
3275 wl = wn;
3276 }
3277
3278 if (types & (EV_TIMER | EV_STAT))
3279 for (i = timercnt + HEAP0; i-- > HEAP0; )
3280#if EV_STAT_ENABLE
3281 /*TODO: timer is not always active*/
3282 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3283 {
3284 if (types & EV_STAT)
3285 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3286 }
3287 else
3288#endif
3289 if (types & EV_TIMER)
3290 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3291
3292#if EV_PERIODIC_ENABLE
3293 if (types & EV_PERIODIC)
3294 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3295 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3296#endif
3297
3298#if EV_IDLE_ENABLE
3299 if (types & EV_IDLE)
3300 for (j = NUMPRI; i--; )
3301 for (i = idlecnt [j]; i--; )
3302 cb (EV_A_ EV_IDLE, idles [j][i]);
3303#endif
3304
3305#if EV_FORK_ENABLE
3306 if (types & EV_FORK)
3307 for (i = forkcnt; i--; )
3308 if (ev_cb (forks [i]) != embed_fork_cb)
3309 cb (EV_A_ EV_FORK, forks [i]);
3310#endif
3311
3312#if EV_ASYNC_ENABLE
3313 if (types & EV_ASYNC)
3314 for (i = asynccnt; i--; )
3315 cb (EV_A_ EV_ASYNC, asyncs [i]);
3316#endif
3317
3318 if (types & EV_PREPARE)
3319 for (i = preparecnt; i--; )
3320#if EV_EMBED_ENABLE
3321 if (ev_cb (prepares [i]) != embed_prepare_cb)
3322#endif
3323 cb (EV_A_ EV_PREPARE, prepares [i]);
3324
3325 if (types & EV_CHECK)
3326 for (i = checkcnt; i--; )
3327 cb (EV_A_ EV_CHECK, checks [i]);
3328
3329 if (types & EV_SIGNAL)
3330 for (i = 0; i < signalmax; ++i)
3331 for (wl = signals [i].head; wl; )
3332 {
3333 wn = wl->next;
3334 cb (EV_A_ EV_SIGNAL, wl);
3335 wl = wn;
3336 }
3337
3338 if (types & EV_CHILD)
3339 for (i = EV_PID_HASHSIZE; i--; )
3340 for (wl = childs [i]; wl; )
3341 {
3342 wn = wl->next;
3343 cb (EV_A_ EV_CHILD, wl);
3344 wl = wn;
3345 }
3346/* EV_STAT 0x00001000 /* stat data changed */
3347/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3348}
3349#endif
3350
3351#if EV_MULTIPLICITY
3352 #include "ev_wrap.h"
3353#endif
3354
1786#ifdef __cplusplus 3355#ifdef __cplusplus
1787} 3356}
1788#endif 3357#endif
1789 3358

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