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Comparing libev/ev.c (file contents):
Revision 1.161 by root, Sat Dec 1 23:43:45 2007 UTC vs.
Revision 1.310 by root, Sun Jul 26 04:43:03 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# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
43# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
46# endif 69# endif
47# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
49# endif 72# endif
50# else 73# else
51# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
53# endif 76# endif
54# ifndef EV_USE_REALTIME 77# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
56# endif 87# endif
57# endif 88# endif
58 89
59# ifndef EV_USE_SELECT 90# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
102# else 133# else
103# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
104# endif 135# endif
105# endif 136# endif
106 137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
107#endif 154#endif
108 155
109#include <math.h> 156#include <math.h>
110#include <stdlib.h> 157#include <stdlib.h>
111#include <fcntl.h> 158#include <fcntl.h>
… …
129#ifndef _WIN32 176#ifndef _WIN32
130# include <sys/time.h> 177# include <sys/time.h>
131# include <sys/wait.h> 178# include <sys/wait.h>
132# include <unistd.h> 179# include <unistd.h>
133#else 180#else
181# include <io.h>
134# define WIN32_LEAN_AND_MEAN 182# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 183# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 184# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 185# define EV_SELECT_IS_WINSOCKET 1
138# endif 186# endif
139#endif 187#endif
140 188
141/**/ 189/* this block tries to deduce configuration from header-defined symbols and defaults */
190
191/* try to deduce the maximum number of signals on this platform */
192#if defined (EV_NSIG)
193/* use what's provided */
194#elif defined (NSIG)
195# define EV_NSIG (NSIG)
196#elif defined(_NSIG)
197# define EV_NSIG (_NSIG)
198#elif defined (SIGMAX)
199# define EV_NSIG (SIGMAX+1)
200#elif defined (SIG_MAX)
201# define EV_NSIG (SIG_MAX+1)
202#elif defined (_SIG_MAX)
203# define EV_NSIG (_SIG_MAX+1)
204#elif defined (MAXSIG)
205# define EV_NSIG (MAXSIG+1)
206#elif defined (MAX_SIG)
207# define EV_NSIG (MAX_SIG+1)
208#elif defined (SIGARRAYSIZE)
209# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210#elif defined (_sys_nsig)
211# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212#else
213# error "unable to find value for NSIG, please report"
214/* to make it compile regardless, just remove the above line */
215# define EV_NSIG 65
216#endif
217
218#ifndef EV_USE_CLOCK_SYSCALL
219# if __linux && __GLIBC__ >= 2
220# define EV_USE_CLOCK_SYSCALL 1
221# else
222# define EV_USE_CLOCK_SYSCALL 0
223# endif
224#endif
142 225
143#ifndef EV_USE_MONOTONIC 226#ifndef EV_USE_MONOTONIC
227# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
228# define EV_USE_MONOTONIC 1
229# else
144# define EV_USE_MONOTONIC 0 230# define EV_USE_MONOTONIC 0
231# endif
145#endif 232#endif
146 233
147#ifndef EV_USE_REALTIME 234#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 235# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
236#endif
237
238#ifndef EV_USE_NANOSLEEP
239# if _POSIX_C_SOURCE >= 199309L
240# define EV_USE_NANOSLEEP 1
241# else
242# define EV_USE_NANOSLEEP 0
243# endif
149#endif 244#endif
150 245
151#ifndef EV_USE_SELECT 246#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 247# define EV_USE_SELECT 1
153#endif 248#endif
… …
159# define EV_USE_POLL 1 254# define EV_USE_POLL 1
160# endif 255# endif
161#endif 256#endif
162 257
163#ifndef EV_USE_EPOLL 258#ifndef EV_USE_EPOLL
259# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
260# define EV_USE_EPOLL 1
261# else
164# define EV_USE_EPOLL 0 262# define EV_USE_EPOLL 0
263# endif
165#endif 264#endif
166 265
167#ifndef EV_USE_KQUEUE 266#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 267# define EV_USE_KQUEUE 0
169#endif 268#endif
… …
171#ifndef EV_USE_PORT 270#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 271# define EV_USE_PORT 0
173#endif 272#endif
174 273
175#ifndef EV_USE_INOTIFY 274#ifndef EV_USE_INOTIFY
275# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
276# define EV_USE_INOTIFY 1
277# else
176# define EV_USE_INOTIFY 0 278# define EV_USE_INOTIFY 0
279# endif
177#endif 280#endif
178 281
179#ifndef EV_PID_HASHSIZE 282#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 283# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 284# define EV_PID_HASHSIZE 1
… …
190# else 293# else
191# define EV_INOTIFY_HASHSIZE 16 294# define EV_INOTIFY_HASHSIZE 16
192# endif 295# endif
193#endif 296#endif
194 297
195/**/ 298#ifndef EV_USE_EVENTFD
299# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
300# define EV_USE_EVENTFD 1
301# else
302# define EV_USE_EVENTFD 0
303# endif
304#endif
305
306#ifndef EV_USE_SIGNALFD
307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
308# define EV_USE_SIGNALFD 1
309# else
310# define EV_USE_SIGNALFD 0
311# endif
312#endif
313
314#if 0 /* debugging */
315# define EV_VERIFY 3
316# define EV_USE_4HEAP 1
317# define EV_HEAP_CACHE_AT 1
318#endif
319
320#ifndef EV_VERIFY
321# define EV_VERIFY !EV_MINIMAL
322#endif
323
324#ifndef EV_USE_4HEAP
325# define EV_USE_4HEAP !EV_MINIMAL
326#endif
327
328#ifndef EV_HEAP_CACHE_AT
329# define EV_HEAP_CACHE_AT !EV_MINIMAL
330#endif
331
332/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
333/* which makes programs even slower. might work on other unices, too. */
334#if EV_USE_CLOCK_SYSCALL
335# include <syscall.h>
336# ifdef SYS_clock_gettime
337# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
338# undef EV_USE_MONOTONIC
339# define EV_USE_MONOTONIC 1
340# else
341# undef EV_USE_CLOCK_SYSCALL
342# define EV_USE_CLOCK_SYSCALL 0
343# endif
344#endif
345
346/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 347
197#ifndef CLOCK_MONOTONIC 348#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 349# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 350# define EV_USE_MONOTONIC 0
200#endif 351#endif
… …
202#ifndef CLOCK_REALTIME 353#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 354# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 355# define EV_USE_REALTIME 0
205#endif 356#endif
206 357
358#if !EV_STAT_ENABLE
359# undef EV_USE_INOTIFY
360# define EV_USE_INOTIFY 0
361#endif
362
363#if !EV_USE_NANOSLEEP
364# ifndef _WIN32
365# include <sys/select.h>
366# endif
367#endif
368
369#if EV_USE_INOTIFY
370# include <sys/utsname.h>
371# include <sys/statfs.h>
372# include <sys/inotify.h>
373/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
374# ifndef IN_DONT_FOLLOW
375# undef EV_USE_INOTIFY
376# define EV_USE_INOTIFY 0
377# endif
378#endif
379
207#if EV_SELECT_IS_WINSOCKET 380#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 381# include <winsock.h>
209#endif 382#endif
210 383
211#if !EV_STAT_ENABLE 384#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 385/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
386# include <stdint.h>
387# ifndef EFD_NONBLOCK
388# define EFD_NONBLOCK O_NONBLOCK
213#endif 389# endif
390# ifndef EFD_CLOEXEC
391# define EFD_CLOEXEC O_CLOEXEC
392# endif
393# ifdef __cplusplus
394extern "C" {
395# endif
396int eventfd (unsigned int initval, int flags);
397# ifdef __cplusplus
398}
399# endif
400#endif
214 401
215#if EV_USE_INOTIFY 402#if EV_USE_SIGNALFD
216# include <sys/inotify.h> 403# include <sys/signalfd.h>
217#endif 404#endif
218 405
219/**/ 406/**/
407
408#if EV_VERIFY >= 3
409# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
410#else
411# define EV_FREQUENT_CHECK do { } while (0)
412#endif
413
414/*
415 * This is used to avoid floating point rounding problems.
416 * It is added to ev_rt_now when scheduling periodics
417 * to ensure progress, time-wise, even when rounding
418 * errors are against us.
419 * This value is good at least till the year 4000.
420 * Better solutions welcome.
421 */
422#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220 423
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 424#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 425#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 426/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
224 427
225#if __GNUC__ >= 3 428#if __GNUC__ >= 4
226# define expect(expr,value) __builtin_expect ((expr),(value)) 429# define expect(expr,value) __builtin_expect ((expr),(value))
227# define inline_size static inline /* inline for codesize */
228# if EV_MINIMAL
229# define noinline __attribute__ ((noinline)) 430# define noinline __attribute__ ((noinline))
230# define inline_speed static noinline
231# else
232# define noinline
233# define inline_speed static inline
234# endif
235#else 431#else
236# define expect(expr,value) (expr) 432# define expect(expr,value) (expr)
237# define inline_speed static
238# define inline_size static
239# define noinline 433# define noinline
434# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
435# define inline
436# endif
240#endif 437#endif
241 438
242#define expect_false(expr) expect ((expr) != 0, 0) 439#define expect_false(expr) expect ((expr) != 0, 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 440#define expect_true(expr) expect ((expr) != 0, 1)
441#define inline_size static inline
244 442
443#if EV_MINIMAL
444# define inline_speed static noinline
445#else
446# define inline_speed static inline
447#endif
448
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 449#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
450
451#if EV_MINPRI == EV_MAXPRI
452# define ABSPRI(w) (((W)w), 0)
453#else
246#define ABSPRI(w) ((w)->priority - EV_MINPRI) 454# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
455#endif
247 456
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 457#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 458#define EMPTY2(a,b) /* used to suppress some warnings */
250 459
251typedef ev_watcher *W; 460typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 461typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 462typedef ev_watcher_time *WT;
254 463
464#define ev_active(w) ((W)(w))->active
465#define ev_at(w) ((WT)(w))->at
466
467#if EV_USE_REALTIME
468/* sig_atomic_t is used to avoid per-thread variables or locking but still */
469/* giving it a reasonably high chance of working on typical architetcures */
470static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
471#endif
472
473#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 474static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
475#endif
256 476
257#ifdef _WIN32 477#ifdef _WIN32
258# include "ev_win32.c" 478# include "ev_win32.c"
259#endif 479#endif
260 480
… …
267{ 487{
268 syserr_cb = cb; 488 syserr_cb = cb;
269} 489}
270 490
271static void noinline 491static void noinline
272syserr (const char *msg) 492ev_syserr (const char *msg)
273{ 493{
274 if (!msg) 494 if (!msg)
275 msg = "(libev) system error"; 495 msg = "(libev) system error";
276 496
277 if (syserr_cb) 497 if (syserr_cb)
… …
281 perror (msg); 501 perror (msg);
282 abort (); 502 abort ();
283 } 503 }
284} 504}
285 505
506static void *
507ev_realloc_emul (void *ptr, long size)
508{
509 /* some systems, notably openbsd and darwin, fail to properly
510 * implement realloc (x, 0) (as required by both ansi c-98 and
511 * the single unix specification, so work around them here.
512 */
513
514 if (size)
515 return realloc (ptr, size);
516
517 free (ptr);
518 return 0;
519}
520
286static void *(*alloc)(void *ptr, long size); 521static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287 522
288void 523void
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 524ev_set_allocator (void *(*cb)(void *ptr, long size))
290{ 525{
291 alloc = cb; 526 alloc = cb;
292} 527}
293 528
294inline_speed void * 529inline_speed void *
295ev_realloc (void *ptr, long size) 530ev_realloc (void *ptr, long size)
296{ 531{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 532 ptr = alloc (ptr, size);
298 533
299 if (!ptr && size) 534 if (!ptr && size)
300 { 535 {
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 536 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
302 abort (); 537 abort ();
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 543#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 544#define ev_free(ptr) ev_realloc ((ptr), 0)
310 545
311/*****************************************************************************/ 546/*****************************************************************************/
312 547
548/* set in reify when reification needed */
549#define EV_ANFD_REIFY 1
550
551/* file descriptor info structure */
313typedef struct 552typedef struct
314{ 553{
315 WL head; 554 WL head;
316 unsigned char events; 555 unsigned char events; /* the events watched for */
556 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
557 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 558 unsigned char unused;
559#if EV_USE_EPOLL
560 unsigned int egen; /* generation counter to counter epoll bugs */
561#endif
318#if EV_SELECT_IS_WINSOCKET 562#if EV_SELECT_IS_WINSOCKET
319 SOCKET handle; 563 SOCKET handle;
320#endif 564#endif
321} ANFD; 565} ANFD;
322 566
567/* stores the pending event set for a given watcher */
323typedef struct 568typedef struct
324{ 569{
325 W w; 570 W w;
326 int events; 571 int events; /* the pending event set for the given watcher */
327} ANPENDING; 572} ANPENDING;
328 573
329#if EV_USE_INOTIFY 574#if EV_USE_INOTIFY
575/* hash table entry per inotify-id */
330typedef struct 576typedef struct
331{ 577{
332 WL head; 578 WL head;
333} ANFS; 579} ANFS;
580#endif
581
582/* Heap Entry */
583#if EV_HEAP_CACHE_AT
584 /* a heap element */
585 typedef struct {
586 ev_tstamp at;
587 WT w;
588 } ANHE;
589
590 #define ANHE_w(he) (he).w /* access watcher, read-write */
591 #define ANHE_at(he) (he).at /* access cached at, read-only */
592 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
593#else
594 /* a heap element */
595 typedef WT ANHE;
596
597 #define ANHE_w(he) (he)
598 #define ANHE_at(he) (he)->at
599 #define ANHE_at_cache(he)
334#endif 600#endif
335 601
336#if EV_MULTIPLICITY 602#if EV_MULTIPLICITY
337 603
338 struct ev_loop 604 struct ev_loop
… …
357 623
358 static int ev_default_loop_ptr; 624 static int ev_default_loop_ptr;
359 625
360#endif 626#endif
361 627
628#if EV_MINIMAL < 2
629# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
630# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
631# define EV_INVOKE_PENDING invoke_cb (EV_A)
632#else
633# define EV_RELEASE_CB (void)0
634# define EV_ACQUIRE_CB (void)0
635# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
636#endif
637
638#define EVUNLOOP_RECURSE 0x80
639
362/*****************************************************************************/ 640/*****************************************************************************/
363 641
642#ifndef EV_HAVE_EV_TIME
364ev_tstamp 643ev_tstamp
365ev_time (void) 644ev_time (void)
366{ 645{
367#if EV_USE_REALTIME 646#if EV_USE_REALTIME
647 if (expect_true (have_realtime))
648 {
368 struct timespec ts; 649 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 650 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 651 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 652 }
653#endif
654
372 struct timeval tv; 655 struct timeval tv;
373 gettimeofday (&tv, 0); 656 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 657 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 658}
659#endif
377 660
378ev_tstamp inline_size 661inline_size ev_tstamp
379get_clock (void) 662get_clock (void)
380{ 663{
381#if EV_USE_MONOTONIC 664#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 665 if (expect_true (have_monotonic))
383 { 666 {
… …
396{ 679{
397 return ev_rt_now; 680 return ev_rt_now;
398} 681}
399#endif 682#endif
400 683
401#define array_roundsize(type,n) (((n) | 4) & ~3) 684void
685ev_sleep (ev_tstamp delay)
686{
687 if (delay > 0.)
688 {
689#if EV_USE_NANOSLEEP
690 struct timespec ts;
691
692 ts.tv_sec = (time_t)delay;
693 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
694
695 nanosleep (&ts, 0);
696#elif defined(_WIN32)
697 Sleep ((unsigned long)(delay * 1e3));
698#else
699 struct timeval tv;
700
701 tv.tv_sec = (time_t)delay;
702 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
703
704 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
705 /* something not guaranteed by newer posix versions, but guaranteed */
706 /* by older ones */
707 select (0, 0, 0, 0, &tv);
708#endif
709 }
710}
711
712/*****************************************************************************/
713
714#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
715
716/* find a suitable new size for the given array, */
717/* hopefully by rounding to a ncie-to-malloc size */
718inline_size int
719array_nextsize (int elem, int cur, int cnt)
720{
721 int ncur = cur + 1;
722
723 do
724 ncur <<= 1;
725 while (cnt > ncur);
726
727 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
728 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
729 {
730 ncur *= elem;
731 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
732 ncur = ncur - sizeof (void *) * 4;
733 ncur /= elem;
734 }
735
736 return ncur;
737}
738
739static noinline void *
740array_realloc (int elem, void *base, int *cur, int cnt)
741{
742 *cur = array_nextsize (elem, *cur, cnt);
743 return ev_realloc (base, elem * *cur);
744}
745
746#define array_init_zero(base,count) \
747 memset ((void *)(base), 0, sizeof (*(base)) * (count))
402 748
403#define array_needsize(type,base,cur,cnt,init) \ 749#define array_needsize(type,base,cur,cnt,init) \
404 if (expect_false ((cnt) > cur)) \ 750 if (expect_false ((cnt) > (cur))) \
405 { \ 751 { \
406 int newcnt = cur; \ 752 int ocur_ = (cur); \
407 do \ 753 (base) = (type *)array_realloc \
408 { \ 754 (sizeof (type), (base), &(cur), (cnt)); \
409 newcnt = array_roundsize (type, newcnt << 1); \ 755 init ((base) + (ocur_), (cur) - ocur_); \
410 } \
411 while ((cnt) > newcnt); \
412 \
413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
414 init (base + cur, newcnt - cur); \
415 cur = newcnt; \
416 } 756 }
417 757
758#if 0
418#define array_slim(type,stem) \ 759#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 760 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \ 761 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \ 762 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 763 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 764 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 } 765 }
766#endif
425 767
426#define array_free(stem, idx) \ 768#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 769 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
428 770
429/*****************************************************************************/ 771/*****************************************************************************/
772
773/* dummy callback for pending events */
774static void noinline
775pendingcb (EV_P_ ev_prepare *w, int revents)
776{
777}
430 778
431void noinline 779void noinline
432ev_feed_event (EV_P_ void *w, int revents) 780ev_feed_event (EV_P_ void *w, int revents)
433{ 781{
434 W w_ = (W)w; 782 W w_ = (W)w;
783 int pri = ABSPRI (w_);
435 784
436 if (expect_false (w_->pending)) 785 if (expect_false (w_->pending))
786 pendings [pri][w_->pending - 1].events |= revents;
787 else
437 { 788 {
789 w_->pending = ++pendingcnt [pri];
790 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
791 pendings [pri][w_->pending - 1].w = w_;
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 792 pendings [pri][w_->pending - 1].events = revents;
439 return;
440 } 793 }
441
442 w_->pending = ++pendingcnt [ABSPRI (w_)];
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446} 794}
447 795
448void inline_size 796inline_speed void
797feed_reverse (EV_P_ W w)
798{
799 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
800 rfeeds [rfeedcnt++] = w;
801}
802
803inline_size void
804feed_reverse_done (EV_P_ int revents)
805{
806 do
807 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
808 while (rfeedcnt);
809}
810
811inline_speed void
449queue_events (EV_P_ W *events, int eventcnt, int type) 812queue_events (EV_P_ W *events, int eventcnt, int type)
450{ 813{
451 int i; 814 int i;
452 815
453 for (i = 0; i < eventcnt; ++i) 816 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type); 817 ev_feed_event (EV_A_ events [i], type);
455} 818}
456 819
457/*****************************************************************************/ 820/*****************************************************************************/
458 821
459void inline_size 822inline_speed void
460anfds_init (ANFD *base, int count)
461{
462 while (count--)
463 {
464 base->head = 0;
465 base->events = EV_NONE;
466 base->reify = 0;
467
468 ++base;
469 }
470}
471
472void inline_speed
473fd_event (EV_P_ int fd, int revents) 823fd_event_nc (EV_P_ int fd, int revents)
474{ 824{
475 ANFD *anfd = anfds + fd; 825 ANFD *anfd = anfds + fd;
476 ev_io *w; 826 ev_io *w;
477 827
478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 828 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
482 if (ev) 832 if (ev)
483 ev_feed_event (EV_A_ (W)w, ev); 833 ev_feed_event (EV_A_ (W)w, ev);
484 } 834 }
485} 835}
486 836
837/* do not submit kernel events for fds that have reify set */
838/* because that means they changed while we were polling for new events */
839inline_speed void
840fd_event (EV_P_ int fd, int revents)
841{
842 ANFD *anfd = anfds + fd;
843
844 if (expect_true (!anfd->reify))
845 fd_event_nc (EV_A_ fd, revents);
846}
847
487void 848void
488ev_feed_fd_event (EV_P_ int fd, int revents) 849ev_feed_fd_event (EV_P_ int fd, int revents)
489{ 850{
851 if (fd >= 0 && fd < anfdmax)
490 fd_event (EV_A_ fd, revents); 852 fd_event_nc (EV_A_ fd, revents);
491} 853}
492 854
493void inline_size 855/* make sure the external fd watch events are in-sync */
856/* with the kernel/libev internal state */
857inline_size void
494fd_reify (EV_P) 858fd_reify (EV_P)
495{ 859{
496 int i; 860 int i;
497 861
498 for (i = 0; i < fdchangecnt; ++i) 862 for (i = 0; i < fdchangecnt; ++i)
499 { 863 {
500 int fd = fdchanges [i]; 864 int fd = fdchanges [i];
501 ANFD *anfd = anfds + fd; 865 ANFD *anfd = anfds + fd;
502 ev_io *w; 866 ev_io *w;
503 867
504 int events = 0; 868 unsigned char events = 0;
505 869
506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 870 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
507 events |= w->events; 871 events |= (unsigned char)w->events;
508 872
509#if EV_SELECT_IS_WINSOCKET 873#if EV_SELECT_IS_WINSOCKET
510 if (events) 874 if (events)
511 { 875 {
512 unsigned long argp; 876 unsigned long arg;
877 #ifdef EV_FD_TO_WIN32_HANDLE
878 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
879 #else
513 anfd->handle = _get_osfhandle (fd); 880 anfd->handle = _get_osfhandle (fd);
881 #endif
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 882 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
515 } 883 }
516#endif 884#endif
517 885
886 {
887 unsigned char o_events = anfd->events;
888 unsigned char o_reify = anfd->reify;
889
518 anfd->reify = 0; 890 anfd->reify = 0;
519
520 backend_modify (EV_A_ fd, anfd->events, events);
521 anfd->events = events; 891 anfd->events = events;
892
893 if (o_events != events || o_reify & EV__IOFDSET)
894 backend_modify (EV_A_ fd, o_events, events);
895 }
522 } 896 }
523 897
524 fdchangecnt = 0; 898 fdchangecnt = 0;
525} 899}
526 900
527void inline_size 901/* something about the given fd changed */
902inline_size void
528fd_change (EV_P_ int fd) 903fd_change (EV_P_ int fd, int flags)
529{ 904{
530 if (expect_false (anfds [fd].reify)) 905 unsigned char reify = anfds [fd].reify;
531 return;
532
533 anfds [fd].reify = 1; 906 anfds [fd].reify |= flags;
534 907
908 if (expect_true (!reify))
909 {
535 ++fdchangecnt; 910 ++fdchangecnt;
536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 911 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
537 fdchanges [fdchangecnt - 1] = fd; 912 fdchanges [fdchangecnt - 1] = fd;
913 }
538} 914}
539 915
540void inline_speed 916/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
917inline_speed void
541fd_kill (EV_P_ int fd) 918fd_kill (EV_P_ int fd)
542{ 919{
543 ev_io *w; 920 ev_io *w;
544 921
545 while ((w = (ev_io *)anfds [fd].head)) 922 while ((w = (ev_io *)anfds [fd].head))
… …
547 ev_io_stop (EV_A_ w); 924 ev_io_stop (EV_A_ w);
548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 925 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
549 } 926 }
550} 927}
551 928
552int inline_size 929/* check whether the given fd is atcually valid, for error recovery */
930inline_size int
553fd_valid (int fd) 931fd_valid (int fd)
554{ 932{
555#ifdef _WIN32 933#ifdef _WIN32
556 return _get_osfhandle (fd) != -1; 934 return _get_osfhandle (fd) != -1;
557#else 935#else
… …
565{ 943{
566 int fd; 944 int fd;
567 945
568 for (fd = 0; fd < anfdmax; ++fd) 946 for (fd = 0; fd < anfdmax; ++fd)
569 if (anfds [fd].events) 947 if (anfds [fd].events)
570 if (!fd_valid (fd) == -1 && errno == EBADF) 948 if (!fd_valid (fd) && errno == EBADF)
571 fd_kill (EV_A_ fd); 949 fd_kill (EV_A_ fd);
572} 950}
573 951
574/* called on ENOMEM in select/poll to kill some fds and retry */ 952/* called on ENOMEM in select/poll to kill some fds and retry */
575static void noinline 953static void noinline
… …
579 957
580 for (fd = anfdmax; fd--; ) 958 for (fd = anfdmax; fd--; )
581 if (anfds [fd].events) 959 if (anfds [fd].events)
582 { 960 {
583 fd_kill (EV_A_ fd); 961 fd_kill (EV_A_ fd);
584 return; 962 break;
585 } 963 }
586} 964}
587 965
588/* usually called after fork if backend needs to re-arm all fds from scratch */ 966/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline 967static void noinline
… …
593 971
594 for (fd = 0; fd < anfdmax; ++fd) 972 for (fd = 0; fd < anfdmax; ++fd)
595 if (anfds [fd].events) 973 if (anfds [fd].events)
596 { 974 {
597 anfds [fd].events = 0; 975 anfds [fd].events = 0;
598 fd_change (EV_A_ fd); 976 anfds [fd].emask = 0;
977 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
599 } 978 }
600} 979}
601 980
602/*****************************************************************************/ 981/*****************************************************************************/
603 982
604void inline_speed 983/*
605upheap (WT *heap, int k) 984 * the heap functions want a real array index. array index 0 uis guaranteed to not
606{ 985 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
607 WT w = heap [k]; 986 * the branching factor of the d-tree.
987 */
608 988
609 while (k && heap [k >> 1]->at > w->at) 989/*
610 { 990 * at the moment we allow libev the luxury of two heaps,
611 heap [k] = heap [k >> 1]; 991 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
612 ((W)heap [k])->active = k + 1; 992 * which is more cache-efficient.
613 k >>= 1; 993 * the difference is about 5% with 50000+ watchers.
614 } 994 */
995#if EV_USE_4HEAP
615 996
616 heap [k] = w; 997#define DHEAP 4
617 ((W)heap [k])->active = k + 1; 998#define HEAP0 (DHEAP - 1) /* index of first element in heap */
999#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1000#define UPHEAP_DONE(p,k) ((p) == (k))
618 1001
619} 1002/* away from the root */
620 1003inline_speed void
621void inline_speed
622downheap (WT *heap, int N, int k) 1004downheap (ANHE *heap, int N, int k)
623{ 1005{
624 WT w = heap [k]; 1006 ANHE he = heap [k];
1007 ANHE *E = heap + N + HEAP0;
625 1008
626 while (k < (N >> 1)) 1009 for (;;)
627 { 1010 {
628 int j = k << 1; 1011 ev_tstamp minat;
1012 ANHE *minpos;
1013 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
629 1014
630 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1015 /* find minimum child */
1016 if (expect_true (pos + DHEAP - 1 < E))
631 ++j; 1017 {
632 1018 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
633 if (w->at <= heap [j]->at) 1019 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1020 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1021 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1022 }
1023 else if (pos < E)
1024 {
1025 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1026 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1027 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1028 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1029 }
1030 else
634 break; 1031 break;
635 1032
1033 if (ANHE_at (he) <= minat)
1034 break;
1035
1036 heap [k] = *minpos;
1037 ev_active (ANHE_w (*minpos)) = k;
1038
1039 k = minpos - heap;
1040 }
1041
1042 heap [k] = he;
1043 ev_active (ANHE_w (he)) = k;
1044}
1045
1046#else /* 4HEAP */
1047
1048#define HEAP0 1
1049#define HPARENT(k) ((k) >> 1)
1050#define UPHEAP_DONE(p,k) (!(p))
1051
1052/* away from the root */
1053inline_speed void
1054downheap (ANHE *heap, int N, int k)
1055{
1056 ANHE he = heap [k];
1057
1058 for (;;)
1059 {
1060 int c = k << 1;
1061
1062 if (c >= N + HEAP0)
1063 break;
1064
1065 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1066 ? 1 : 0;
1067
1068 if (ANHE_at (he) <= ANHE_at (heap [c]))
1069 break;
1070
636 heap [k] = heap [j]; 1071 heap [k] = heap [c];
637 ((W)heap [k])->active = k + 1; 1072 ev_active (ANHE_w (heap [k])) = k;
1073
638 k = j; 1074 k = c;
639 } 1075 }
640 1076
641 heap [k] = w; 1077 heap [k] = he;
642 ((W)heap [k])->active = k + 1; 1078 ev_active (ANHE_w (he)) = k;
643} 1079}
1080#endif
644 1081
645void inline_size 1082/* towards the root */
1083inline_speed void
1084upheap (ANHE *heap, int k)
1085{
1086 ANHE he = heap [k];
1087
1088 for (;;)
1089 {
1090 int p = HPARENT (k);
1091
1092 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1093 break;
1094
1095 heap [k] = heap [p];
1096 ev_active (ANHE_w (heap [k])) = k;
1097 k = p;
1098 }
1099
1100 heap [k] = he;
1101 ev_active (ANHE_w (he)) = k;
1102}
1103
1104/* move an element suitably so it is in a correct place */
1105inline_size void
646adjustheap (WT *heap, int N, int k) 1106adjustheap (ANHE *heap, int N, int k)
647{ 1107{
1108 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
648 upheap (heap, k); 1109 upheap (heap, k);
1110 else
649 downheap (heap, N, k); 1111 downheap (heap, N, k);
1112}
1113
1114/* rebuild the heap: this function is used only once and executed rarely */
1115inline_size void
1116reheap (ANHE *heap, int N)
1117{
1118 int i;
1119
1120 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1121 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1122 for (i = 0; i < N; ++i)
1123 upheap (heap, i + HEAP0);
650} 1124}
651 1125
652/*****************************************************************************/ 1126/*****************************************************************************/
653 1127
1128/* associate signal watchers to a signal signal */
654typedef struct 1129typedef struct
655{ 1130{
1131 EV_ATOMIC_T pending;
1132#if EV_MULTIPLICITY
1133 EV_P;
1134#endif
656 WL head; 1135 WL head;
657 sig_atomic_t volatile gotsig;
658} ANSIG; 1136} ANSIG;
659 1137
660static ANSIG *signals; 1138static ANSIG signals [EV_NSIG - 1];
661static int signalmax;
662 1139
663static int sigpipe [2]; 1140/*****************************************************************************/
664static sig_atomic_t volatile gotsig;
665static ev_io sigev;
666 1141
667void inline_size 1142/* used to prepare libev internal fd's */
668signals_init (ANSIG *base, int count) 1143/* this is not fork-safe */
669{ 1144inline_speed void
670 while (count--)
671 {
672 base->head = 0;
673 base->gotsig = 0;
674
675 ++base;
676 }
677}
678
679static void
680sighandler (int signum)
681{
682#if _WIN32
683 signal (signum, sighandler);
684#endif
685
686 signals [signum - 1].gotsig = 1;
687
688 if (!gotsig)
689 {
690 int old_errno = errno;
691 gotsig = 1;
692 write (sigpipe [1], &signum, 1);
693 errno = old_errno;
694 }
695}
696
697void noinline
698ev_feed_signal_event (EV_P_ int signum)
699{
700 WL w;
701
702#if EV_MULTIPLICITY
703 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
704#endif
705
706 --signum;
707
708 if (signum < 0 || signum >= signalmax)
709 return;
710
711 signals [signum].gotsig = 0;
712
713 for (w = signals [signum].head; w; w = w->next)
714 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
715}
716
717static void
718sigcb (EV_P_ ev_io *iow, int revents)
719{
720 int signum;
721
722 read (sigpipe [0], &revents, 1);
723 gotsig = 0;
724
725 for (signum = signalmax; signum--; )
726 if (signals [signum].gotsig)
727 ev_feed_signal_event (EV_A_ signum + 1);
728}
729
730void inline_size
731fd_intern (int fd) 1145fd_intern (int fd)
732{ 1146{
733#ifdef _WIN32 1147#ifdef _WIN32
734 int arg = 1; 1148 unsigned long arg = 1;
735 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1149 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
736#else 1150#else
737 fcntl (fd, F_SETFD, FD_CLOEXEC); 1151 fcntl (fd, F_SETFD, FD_CLOEXEC);
738 fcntl (fd, F_SETFL, O_NONBLOCK); 1152 fcntl (fd, F_SETFL, O_NONBLOCK);
739#endif 1153#endif
740} 1154}
741 1155
742static void noinline 1156static void noinline
743siginit (EV_P) 1157evpipe_init (EV_P)
744{ 1158{
1159 if (!ev_is_active (&pipe_w))
1160 {
1161#if EV_USE_EVENTFD
1162 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1163 if (evfd < 0 && errno == EINVAL)
1164 evfd = eventfd (0, 0);
1165
1166 if (evfd >= 0)
1167 {
1168 evpipe [0] = -1;
1169 fd_intern (evfd); /* doing it twice doesn't hurt */
1170 ev_io_set (&pipe_w, evfd, EV_READ);
1171 }
1172 else
1173#endif
1174 {
1175 while (pipe (evpipe))
1176 ev_syserr ("(libev) error creating signal/async pipe");
1177
745 fd_intern (sigpipe [0]); 1178 fd_intern (evpipe [0]);
746 fd_intern (sigpipe [1]); 1179 fd_intern (evpipe [1]);
1180 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1181 }
747 1182
748 ev_io_set (&sigev, sigpipe [0], EV_READ);
749 ev_io_start (EV_A_ &sigev); 1183 ev_io_start (EV_A_ &pipe_w);
750 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1184 ev_unref (EV_A); /* watcher should not keep loop alive */
1185 }
1186}
1187
1188inline_size void
1189evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1190{
1191 if (!*flag)
1192 {
1193 int old_errno = errno; /* save errno because write might clobber it */
1194
1195 *flag = 1;
1196
1197#if EV_USE_EVENTFD
1198 if (evfd >= 0)
1199 {
1200 uint64_t counter = 1;
1201 write (evfd, &counter, sizeof (uint64_t));
1202 }
1203 else
1204#endif
1205 write (evpipe [1], &old_errno, 1);
1206
1207 errno = old_errno;
1208 }
1209}
1210
1211/* called whenever the libev signal pipe */
1212/* got some events (signal, async) */
1213static void
1214pipecb (EV_P_ ev_io *iow, int revents)
1215{
1216 int i;
1217
1218#if EV_USE_EVENTFD
1219 if (evfd >= 0)
1220 {
1221 uint64_t counter;
1222 read (evfd, &counter, sizeof (uint64_t));
1223 }
1224 else
1225#endif
1226 {
1227 char dummy;
1228 read (evpipe [0], &dummy, 1);
1229 }
1230
1231 if (sig_pending)
1232 {
1233 sig_pending = 0;
1234
1235 for (i = EV_NSIG - 1; i--; )
1236 if (expect_false (signals [i].pending))
1237 ev_feed_signal_event (EV_A_ i + 1);
1238 }
1239
1240#if EV_ASYNC_ENABLE
1241 if (async_pending)
1242 {
1243 async_pending = 0;
1244
1245 for (i = asynccnt; i--; )
1246 if (asyncs [i]->sent)
1247 {
1248 asyncs [i]->sent = 0;
1249 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1250 }
1251 }
1252#endif
751} 1253}
752 1254
753/*****************************************************************************/ 1255/*****************************************************************************/
754 1256
1257static void
1258ev_sighandler (int signum)
1259{
1260#if EV_MULTIPLICITY
1261 EV_P = signals [signum - 1].loop;
1262#endif
1263
1264#if _WIN32
1265 signal (signum, ev_sighandler);
1266#endif
1267
1268 signals [signum - 1].pending = 1;
1269 evpipe_write (EV_A_ &sig_pending);
1270}
1271
1272void noinline
1273ev_feed_signal_event (EV_P_ int signum)
1274{
1275 WL w;
1276
1277 if (expect_false (signum <= 0 || signum > EV_NSIG))
1278 return;
1279
1280 --signum;
1281
1282#if EV_MULTIPLICITY
1283 /* it is permissible to try to feed a signal to the wrong loop */
1284 /* or, likely more useful, feeding a signal nobody is waiting for */
1285
1286 if (expect_false (signals [signum].loop != EV_A))
1287 return;
1288#endif
1289
1290 signals [signum].pending = 0;
1291
1292 for (w = signals [signum].head; w; w = w->next)
1293 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1294}
1295
1296#if EV_USE_SIGNALFD
1297static void
1298sigfdcb (EV_P_ ev_io *iow, int revents)
1299{
1300 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1301
1302 for (;;)
1303 {
1304 ssize_t res = read (sigfd, si, sizeof (si));
1305
1306 /* not ISO-C, as res might be -1, but works with SuS */
1307 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1308 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1309
1310 if (res < (ssize_t)sizeof (si))
1311 break;
1312 }
1313}
1314#endif
1315
1316/*****************************************************************************/
1317
755static ev_child *childs [EV_PID_HASHSIZE]; 1318static WL childs [EV_PID_HASHSIZE];
756 1319
757#ifndef _WIN32 1320#ifndef _WIN32
758 1321
759static ev_signal childev; 1322static ev_signal childev;
760 1323
761void inline_speed 1324#ifndef WIFCONTINUED
1325# define WIFCONTINUED(status) 0
1326#endif
1327
1328/* handle a single child status event */
1329inline_speed void
762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1330child_reap (EV_P_ int chain, int pid, int status)
763{ 1331{
764 ev_child *w; 1332 ev_child *w;
1333 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
765 1334
766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1335 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1336 {
767 if (w->pid == pid || !w->pid) 1337 if ((w->pid == pid || !w->pid)
1338 && (!traced || (w->flags & 1)))
768 { 1339 {
769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 1340 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
770 w->rpid = pid; 1341 w->rpid = pid;
771 w->rstatus = status; 1342 w->rstatus = status;
772 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1343 ev_feed_event (EV_A_ (W)w, EV_CHILD);
773 } 1344 }
1345 }
774} 1346}
775 1347
776#ifndef WCONTINUED 1348#ifndef WCONTINUED
777# define WCONTINUED 0 1349# define WCONTINUED 0
778#endif 1350#endif
779 1351
1352/* called on sigchld etc., calls waitpid */
780static void 1353static void
781childcb (EV_P_ ev_signal *sw, int revents) 1354childcb (EV_P_ ev_signal *sw, int revents)
782{ 1355{
783 int pid, status; 1356 int pid, status;
784 1357
… …
787 if (!WCONTINUED 1360 if (!WCONTINUED
788 || errno != EINVAL 1361 || errno != EINVAL
789 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1362 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
790 return; 1363 return;
791 1364
792 /* make sure we are called again until all childs have been reaped */ 1365 /* make sure we are called again until all children have been reaped */
793 /* we need to do it this way so that the callback gets called before we continue */ 1366 /* we need to do it this way so that the callback gets called before we continue */
794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1367 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
795 1368
796 child_reap (EV_A_ sw, pid, pid, status); 1369 child_reap (EV_A_ pid, pid, status);
797 if (EV_PID_HASHSIZE > 1) 1370 if (EV_PID_HASHSIZE > 1)
798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1371 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
799} 1372}
800 1373
801#endif 1374#endif
802 1375
803/*****************************************************************************/ 1376/*****************************************************************************/
… …
865 /* kqueue is borked on everything but netbsd apparently */ 1438 /* kqueue is borked on everything but netbsd apparently */
866 /* it usually doesn't work correctly on anything but sockets and pipes */ 1439 /* it usually doesn't work correctly on anything but sockets and pipes */
867 flags &= ~EVBACKEND_KQUEUE; 1440 flags &= ~EVBACKEND_KQUEUE;
868#endif 1441#endif
869#ifdef __APPLE__ 1442#ifdef __APPLE__
870 // flags &= ~EVBACKEND_KQUEUE; for documentation 1443 /* only select works correctly on that "unix-certified" platform */
871 flags &= ~EVBACKEND_POLL; 1444 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1445 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
872#endif 1446#endif
873 1447
874 return flags; 1448 return flags;
875} 1449}
876 1450
877unsigned int 1451unsigned int
878ev_embeddable_backends (void) 1452ev_embeddable_backends (void)
879{ 1453{
880 return EVBACKEND_EPOLL 1454 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
881 | EVBACKEND_KQUEUE 1455
882 | EVBACKEND_PORT; 1456 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1457 /* please fix it and tell me how to detect the fix */
1458 flags &= ~EVBACKEND_EPOLL;
1459
1460 return flags;
883} 1461}
884 1462
885unsigned int 1463unsigned int
886ev_backend (EV_P) 1464ev_backend (EV_P)
887{ 1465{
888 return backend; 1466 return backend;
889} 1467}
890 1468
1469#if EV_MINIMAL < 2
1470unsigned int
1471ev_loop_count (EV_P)
1472{
1473 return loop_count;
1474}
1475
1476unsigned int
1477ev_loop_depth (EV_P)
1478{
1479 return loop_depth;
1480}
1481
1482void
1483ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1484{
1485 io_blocktime = interval;
1486}
1487
1488void
1489ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1490{
1491 timeout_blocktime = interval;
1492}
1493
1494void
1495ev_set_userdata (EV_P_ void *data)
1496{
1497 userdata = data;
1498}
1499
1500void *
1501ev_userdata (EV_P)
1502{
1503 return userdata;
1504}
1505
1506void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1507{
1508 invoke_cb = invoke_pending_cb;
1509}
1510
1511void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1512{
1513 release_cb = release;
1514 acquire_cb = acquire;
1515}
1516#endif
1517
1518/* initialise a loop structure, must be zero-initialised */
891static void noinline 1519static void noinline
892loop_init (EV_P_ unsigned int flags) 1520loop_init (EV_P_ unsigned int flags)
893{ 1521{
894 if (!backend) 1522 if (!backend)
895 { 1523 {
1524#if EV_USE_REALTIME
1525 if (!have_realtime)
1526 {
1527 struct timespec ts;
1528
1529 if (!clock_gettime (CLOCK_REALTIME, &ts))
1530 have_realtime = 1;
1531 }
1532#endif
1533
896#if EV_USE_MONOTONIC 1534#if EV_USE_MONOTONIC
1535 if (!have_monotonic)
897 { 1536 {
898 struct timespec ts; 1537 struct timespec ts;
1538
899 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1539 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
900 have_monotonic = 1; 1540 have_monotonic = 1;
901 } 1541 }
902#endif 1542#endif
903
904 ev_rt_now = ev_time ();
905 mn_now = get_clock ();
906 now_floor = mn_now;
907 rtmn_diff = ev_rt_now - mn_now;
908 1543
909 /* pid check not overridable via env */ 1544 /* pid check not overridable via env */
910#ifndef _WIN32 1545#ifndef _WIN32
911 if (flags & EVFLAG_FORKCHECK) 1546 if (flags & EVFLAG_FORKCHECK)
912 curpid = getpid (); 1547 curpid = getpid ();
… …
915 if (!(flags & EVFLAG_NOENV) 1550 if (!(flags & EVFLAG_NOENV)
916 && !enable_secure () 1551 && !enable_secure ()
917 && getenv ("LIBEV_FLAGS")) 1552 && getenv ("LIBEV_FLAGS"))
918 flags = atoi (getenv ("LIBEV_FLAGS")); 1553 flags = atoi (getenv ("LIBEV_FLAGS"));
919 1554
1555 ev_rt_now = ev_time ();
1556 mn_now = get_clock ();
1557 now_floor = mn_now;
1558 rtmn_diff = ev_rt_now - mn_now;
1559#if EV_MINIMAL < 2
1560 invoke_cb = ev_invoke_pending;
1561#endif
1562
1563 io_blocktime = 0.;
1564 timeout_blocktime = 0.;
1565 backend = 0;
1566 backend_fd = -1;
1567 sig_pending = 0;
1568#if EV_ASYNC_ENABLE
1569 async_pending = 0;
1570#endif
1571#if EV_USE_INOTIFY
1572 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1573#endif
1574#if EV_USE_SIGNALFD
1575 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1576#endif
1577
920 if (!(flags & 0x0000ffffUL)) 1578 if (!(flags & 0x0000ffffU))
921 flags |= ev_recommended_backends (); 1579 flags |= ev_recommended_backends ();
922
923 backend = 0;
924 backend_fd = -1;
925#if EV_USE_INOTIFY
926 fs_fd = -2;
927#endif
928 1580
929#if EV_USE_PORT 1581#if EV_USE_PORT
930 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1582 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
931#endif 1583#endif
932#if EV_USE_KQUEUE 1584#if EV_USE_KQUEUE
… …
940#endif 1592#endif
941#if EV_USE_SELECT 1593#if EV_USE_SELECT
942 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1594 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
943#endif 1595#endif
944 1596
1597 ev_prepare_init (&pending_w, pendingcb);
1598
945 ev_init (&sigev, sigcb); 1599 ev_init (&pipe_w, pipecb);
946 ev_set_priority (&sigev, EV_MAXPRI); 1600 ev_set_priority (&pipe_w, EV_MAXPRI);
947 } 1601 }
948} 1602}
949 1603
1604/* free up a loop structure */
950static void noinline 1605static void noinline
951loop_destroy (EV_P) 1606loop_destroy (EV_P)
952{ 1607{
953 int i; 1608 int i;
1609
1610 if (ev_is_active (&pipe_w))
1611 {
1612 /*ev_ref (EV_A);*/
1613 /*ev_io_stop (EV_A_ &pipe_w);*/
1614
1615#if EV_USE_EVENTFD
1616 if (evfd >= 0)
1617 close (evfd);
1618#endif
1619
1620 if (evpipe [0] >= 0)
1621 {
1622 close (evpipe [0]);
1623 close (evpipe [1]);
1624 }
1625 }
1626
1627#if EV_USE_SIGNALFD
1628 if (ev_is_active (&sigfd_w))
1629 {
1630 /*ev_ref (EV_A);*/
1631 /*ev_io_stop (EV_A_ &sigfd_w);*/
1632
1633 close (sigfd);
1634 }
1635#endif
954 1636
955#if EV_USE_INOTIFY 1637#if EV_USE_INOTIFY
956 if (fs_fd >= 0) 1638 if (fs_fd >= 0)
957 close (fs_fd); 1639 close (fs_fd);
958#endif 1640#endif
… …
975#if EV_USE_SELECT 1657#if EV_USE_SELECT
976 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1658 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
977#endif 1659#endif
978 1660
979 for (i = NUMPRI; i--; ) 1661 for (i = NUMPRI; i--; )
1662 {
980 array_free (pending, [i]); 1663 array_free (pending, [i]);
1664#if EV_IDLE_ENABLE
1665 array_free (idle, [i]);
1666#endif
1667 }
1668
1669 ev_free (anfds); anfds = 0; anfdmax = 0;
981 1670
982 /* have to use the microsoft-never-gets-it-right macro */ 1671 /* have to use the microsoft-never-gets-it-right macro */
1672 array_free (rfeed, EMPTY);
983 array_free (fdchange, EMPTY0); 1673 array_free (fdchange, EMPTY);
984 array_free (timer, EMPTY0); 1674 array_free (timer, EMPTY);
985#if EV_PERIODIC_ENABLE 1675#if EV_PERIODIC_ENABLE
986 array_free (periodic, EMPTY0); 1676 array_free (periodic, EMPTY);
987#endif 1677#endif
1678#if EV_FORK_ENABLE
988 array_free (idle, EMPTY0); 1679 array_free (fork, EMPTY);
1680#endif
989 array_free (prepare, EMPTY0); 1681 array_free (prepare, EMPTY);
990 array_free (check, EMPTY0); 1682 array_free (check, EMPTY);
1683#if EV_ASYNC_ENABLE
1684 array_free (async, EMPTY);
1685#endif
991 1686
992 backend = 0; 1687 backend = 0;
993} 1688}
994 1689
1690#if EV_USE_INOTIFY
995void inline_size infy_fork (EV_P); 1691inline_size void infy_fork (EV_P);
1692#endif
996 1693
997void inline_size 1694inline_size void
998loop_fork (EV_P) 1695loop_fork (EV_P)
999{ 1696{
1000#if EV_USE_PORT 1697#if EV_USE_PORT
1001 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1698 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1002#endif 1699#endif
… …
1008#endif 1705#endif
1009#if EV_USE_INOTIFY 1706#if EV_USE_INOTIFY
1010 infy_fork (EV_A); 1707 infy_fork (EV_A);
1011#endif 1708#endif
1012 1709
1013 if (ev_is_active (&sigev)) 1710 if (ev_is_active (&pipe_w))
1014 { 1711 {
1015 /* default loop */ 1712 /* this "locks" the handlers against writing to the pipe */
1713 /* while we modify the fd vars */
1714 sig_pending = 1;
1715#if EV_ASYNC_ENABLE
1716 async_pending = 1;
1717#endif
1016 1718
1017 ev_ref (EV_A); 1719 ev_ref (EV_A);
1018 ev_io_stop (EV_A_ &sigev); 1720 ev_io_stop (EV_A_ &pipe_w);
1721
1722#if EV_USE_EVENTFD
1723 if (evfd >= 0)
1724 close (evfd);
1725#endif
1726
1727 if (evpipe [0] >= 0)
1728 {
1019 close (sigpipe [0]); 1729 close (evpipe [0]);
1020 close (sigpipe [1]); 1730 close (evpipe [1]);
1731 }
1021 1732
1022 while (pipe (sigpipe))
1023 syserr ("(libev) error creating pipe");
1024
1025 siginit (EV_A); 1733 evpipe_init (EV_A);
1734 /* now iterate over everything, in case we missed something */
1735 pipecb (EV_A_ &pipe_w, EV_READ);
1026 } 1736 }
1027 1737
1028 postfork = 0; 1738 postfork = 0;
1029} 1739}
1030 1740
1031#if EV_MULTIPLICITY 1741#if EV_MULTIPLICITY
1742
1032struct ev_loop * 1743struct ev_loop *
1033ev_loop_new (unsigned int flags) 1744ev_loop_new (unsigned int flags)
1034{ 1745{
1035 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1746 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1036 1747
1037 memset (loop, 0, sizeof (struct ev_loop)); 1748 memset (EV_A, 0, sizeof (struct ev_loop));
1038
1039 loop_init (EV_A_ flags); 1749 loop_init (EV_A_ flags);
1040 1750
1041 if (ev_backend (EV_A)) 1751 if (ev_backend (EV_A))
1042 return loop; 1752 return EV_A;
1043 1753
1044 return 0; 1754 return 0;
1045} 1755}
1046 1756
1047void 1757void
… …
1052} 1762}
1053 1763
1054void 1764void
1055ev_loop_fork (EV_P) 1765ev_loop_fork (EV_P)
1056{ 1766{
1057 postfork = 1; 1767 postfork = 1; /* must be in line with ev_default_fork */
1058} 1768}
1769#endif /* multiplicity */
1059 1770
1771#if EV_VERIFY
1772static void noinline
1773verify_watcher (EV_P_ W w)
1774{
1775 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1776
1777 if (w->pending)
1778 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1779}
1780
1781static void noinline
1782verify_heap (EV_P_ ANHE *heap, int N)
1783{
1784 int i;
1785
1786 for (i = HEAP0; i < N + HEAP0; ++i)
1787 {
1788 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1789 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1790 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1791
1792 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1793 }
1794}
1795
1796static void noinline
1797array_verify (EV_P_ W *ws, int cnt)
1798{
1799 while (cnt--)
1800 {
1801 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1802 verify_watcher (EV_A_ ws [cnt]);
1803 }
1804}
1805#endif
1806
1807#if EV_MINIMAL < 2
1808void
1809ev_loop_verify (EV_P)
1810{
1811#if EV_VERIFY
1812 int i;
1813 WL w;
1814
1815 assert (activecnt >= -1);
1816
1817 assert (fdchangemax >= fdchangecnt);
1818 for (i = 0; i < fdchangecnt; ++i)
1819 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1820
1821 assert (anfdmax >= 0);
1822 for (i = 0; i < anfdmax; ++i)
1823 for (w = anfds [i].head; w; w = w->next)
1824 {
1825 verify_watcher (EV_A_ (W)w);
1826 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1827 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1828 }
1829
1830 assert (timermax >= timercnt);
1831 verify_heap (EV_A_ timers, timercnt);
1832
1833#if EV_PERIODIC_ENABLE
1834 assert (periodicmax >= periodiccnt);
1835 verify_heap (EV_A_ periodics, periodiccnt);
1836#endif
1837
1838 for (i = NUMPRI; i--; )
1839 {
1840 assert (pendingmax [i] >= pendingcnt [i]);
1841#if EV_IDLE_ENABLE
1842 assert (idleall >= 0);
1843 assert (idlemax [i] >= idlecnt [i]);
1844 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1845#endif
1846 }
1847
1848#if EV_FORK_ENABLE
1849 assert (forkmax >= forkcnt);
1850 array_verify (EV_A_ (W *)forks, forkcnt);
1851#endif
1852
1853#if EV_ASYNC_ENABLE
1854 assert (asyncmax >= asynccnt);
1855 array_verify (EV_A_ (W *)asyncs, asynccnt);
1856#endif
1857
1858 assert (preparemax >= preparecnt);
1859 array_verify (EV_A_ (W *)prepares, preparecnt);
1860
1861 assert (checkmax >= checkcnt);
1862 array_verify (EV_A_ (W *)checks, checkcnt);
1863
1864# if 0
1865 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1866 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1867# endif
1868#endif
1869}
1060#endif 1870#endif
1061 1871
1062#if EV_MULTIPLICITY 1872#if EV_MULTIPLICITY
1063struct ev_loop * 1873struct ev_loop *
1064ev_default_loop_init (unsigned int flags) 1874ev_default_loop_init (unsigned int flags)
1065#else 1875#else
1066int 1876int
1067ev_default_loop (unsigned int flags) 1877ev_default_loop (unsigned int flags)
1068#endif 1878#endif
1069{ 1879{
1070 if (sigpipe [0] == sigpipe [1])
1071 if (pipe (sigpipe))
1072 return 0;
1073
1074 if (!ev_default_loop_ptr) 1880 if (!ev_default_loop_ptr)
1075 { 1881 {
1076#if EV_MULTIPLICITY 1882#if EV_MULTIPLICITY
1077 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1883 EV_P = ev_default_loop_ptr = &default_loop_struct;
1078#else 1884#else
1079 ev_default_loop_ptr = 1; 1885 ev_default_loop_ptr = 1;
1080#endif 1886#endif
1081 1887
1082 loop_init (EV_A_ flags); 1888 loop_init (EV_A_ flags);
1083 1889
1084 if (ev_backend (EV_A)) 1890 if (ev_backend (EV_A))
1085 { 1891 {
1086 siginit (EV_A);
1087
1088#ifndef _WIN32 1892#ifndef _WIN32
1089 ev_signal_init (&childev, childcb, SIGCHLD); 1893 ev_signal_init (&childev, childcb, SIGCHLD);
1090 ev_set_priority (&childev, EV_MAXPRI); 1894 ev_set_priority (&childev, EV_MAXPRI);
1091 ev_signal_start (EV_A_ &childev); 1895 ev_signal_start (EV_A_ &childev);
1092 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1896 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1101 1905
1102void 1906void
1103ev_default_destroy (void) 1907ev_default_destroy (void)
1104{ 1908{
1105#if EV_MULTIPLICITY 1909#if EV_MULTIPLICITY
1106 struct ev_loop *loop = ev_default_loop_ptr; 1910 EV_P = ev_default_loop_ptr;
1107#endif 1911#endif
1912
1913 ev_default_loop_ptr = 0;
1108 1914
1109#ifndef _WIN32 1915#ifndef _WIN32
1110 ev_ref (EV_A); /* child watcher */ 1916 ev_ref (EV_A); /* child watcher */
1111 ev_signal_stop (EV_A_ &childev); 1917 ev_signal_stop (EV_A_ &childev);
1112#endif 1918#endif
1113 1919
1114 ev_ref (EV_A); /* signal watcher */
1115 ev_io_stop (EV_A_ &sigev);
1116
1117 close (sigpipe [0]); sigpipe [0] = 0;
1118 close (sigpipe [1]); sigpipe [1] = 0;
1119
1120 loop_destroy (EV_A); 1920 loop_destroy (EV_A);
1121} 1921}
1122 1922
1123void 1923void
1124ev_default_fork (void) 1924ev_default_fork (void)
1125{ 1925{
1126#if EV_MULTIPLICITY 1926#if EV_MULTIPLICITY
1127 struct ev_loop *loop = ev_default_loop_ptr; 1927 EV_P = ev_default_loop_ptr;
1128#endif 1928#endif
1129 1929
1130 if (backend) 1930 postfork = 1; /* must be in line with ev_loop_fork */
1131 postfork = 1;
1132} 1931}
1133 1932
1134/*****************************************************************************/ 1933/*****************************************************************************/
1135 1934
1136int inline_size 1935void
1137any_pending (EV_P) 1936ev_invoke (EV_P_ void *w, int revents)
1937{
1938 EV_CB_INVOKE ((W)w, revents);
1939}
1940
1941unsigned int
1942ev_pending_count (EV_P)
1138{ 1943{
1139 int pri; 1944 int pri;
1945 unsigned int count = 0;
1140 1946
1141 for (pri = NUMPRI; pri--; ) 1947 for (pri = NUMPRI; pri--; )
1142 if (pendingcnt [pri]) 1948 count += pendingcnt [pri];
1143 return 1;
1144 1949
1145 return 0; 1950 return count;
1146} 1951}
1147 1952
1148void inline_speed 1953void noinline
1149call_pending (EV_P) 1954ev_invoke_pending (EV_P)
1150{ 1955{
1151 int pri; 1956 int pri;
1152 1957
1153 for (pri = NUMPRI; pri--; ) 1958 for (pri = NUMPRI; pri--; )
1154 while (pendingcnt [pri]) 1959 while (pendingcnt [pri])
1155 { 1960 {
1156 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1961 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1157 1962
1158 if (expect_true (p->w))
1159 {
1160 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1963 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1964 /* ^ this is no longer true, as pending_w could be here */
1161 1965
1162 p->w->pending = 0; 1966 p->w->pending = 0;
1163 EV_CB_INVOKE (p->w, p->events); 1967 EV_CB_INVOKE (p->w, p->events);
1164 } 1968 EV_FREQUENT_CHECK;
1165 } 1969 }
1166} 1970}
1167 1971
1168void inline_size 1972#if EV_IDLE_ENABLE
1973/* make idle watchers pending. this handles the "call-idle */
1974/* only when higher priorities are idle" logic */
1975inline_size void
1976idle_reify (EV_P)
1977{
1978 if (expect_false (idleall))
1979 {
1980 int pri;
1981
1982 for (pri = NUMPRI; pri--; )
1983 {
1984 if (pendingcnt [pri])
1985 break;
1986
1987 if (idlecnt [pri])
1988 {
1989 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1990 break;
1991 }
1992 }
1993 }
1994}
1995#endif
1996
1997/* make timers pending */
1998inline_size void
1169timers_reify (EV_P) 1999timers_reify (EV_P)
1170{ 2000{
2001 EV_FREQUENT_CHECK;
2002
1171 while (timercnt && ((WT)timers [0])->at <= mn_now) 2003 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1172 { 2004 {
1173 ev_timer *w = timers [0]; 2005 do
1174
1175 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1176
1177 /* first reschedule or stop timer */
1178 if (w->repeat)
1179 { 2006 {
2007 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2008
2009 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2010
2011 /* first reschedule or stop timer */
2012 if (w->repeat)
2013 {
2014 ev_at (w) += w->repeat;
2015 if (ev_at (w) < mn_now)
2016 ev_at (w) = mn_now;
2017
1180 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2018 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1181 2019
1182 ((WT)w)->at += w->repeat; 2020 ANHE_at_cache (timers [HEAP0]);
1183 if (((WT)w)->at < mn_now)
1184 ((WT)w)->at = mn_now;
1185
1186 downheap ((WT *)timers, timercnt, 0); 2021 downheap (timers, timercnt, HEAP0);
2022 }
2023 else
2024 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2025
2026 EV_FREQUENT_CHECK;
2027 feed_reverse (EV_A_ (W)w);
1187 } 2028 }
1188 else 2029 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1189 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1190 2030
1191 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2031 feed_reverse_done (EV_A_ EV_TIMEOUT);
1192 } 2032 }
1193} 2033}
1194 2034
1195#if EV_PERIODIC_ENABLE 2035#if EV_PERIODIC_ENABLE
1196void inline_size 2036/* make periodics pending */
2037inline_size void
1197periodics_reify (EV_P) 2038periodics_reify (EV_P)
1198{ 2039{
2040 EV_FREQUENT_CHECK;
2041
1199 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2042 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1200 { 2043 {
1201 ev_periodic *w = periodics [0]; 2044 int feed_count = 0;
1202 2045
1203 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2046 do
1204
1205 /* first reschedule or stop timer */
1206 if (w->reschedule_cb)
1207 { 2047 {
2048 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2049
2050 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2051
2052 /* first reschedule or stop timer */
2053 if (w->reschedule_cb)
2054 {
1208 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2055 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2056
1209 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2057 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2058
2059 ANHE_at_cache (periodics [HEAP0]);
1210 downheap ((WT *)periodics, periodiccnt, 0); 2060 downheap (periodics, periodiccnt, HEAP0);
2061 }
2062 else if (w->interval)
2063 {
2064 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2065 /* if next trigger time is not sufficiently in the future, put it there */
2066 /* this might happen because of floating point inexactness */
2067 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2068 {
2069 ev_at (w) += w->interval;
2070
2071 /* if interval is unreasonably low we might still have a time in the past */
2072 /* so correct this. this will make the periodic very inexact, but the user */
2073 /* has effectively asked to get triggered more often than possible */
2074 if (ev_at (w) < ev_rt_now)
2075 ev_at (w) = ev_rt_now;
2076 }
2077
2078 ANHE_at_cache (periodics [HEAP0]);
2079 downheap (periodics, periodiccnt, HEAP0);
2080 }
2081 else
2082 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2083
2084 EV_FREQUENT_CHECK;
2085 feed_reverse (EV_A_ (W)w);
1211 } 2086 }
1212 else if (w->interval) 2087 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1213 {
1214 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1215 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1216 downheap ((WT *)periodics, periodiccnt, 0);
1217 }
1218 else
1219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1220 2088
1221 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2089 feed_reverse_done (EV_A_ EV_PERIODIC);
1222 } 2090 }
1223} 2091}
1224 2092
2093/* simply recalculate all periodics */
2094/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1225static void noinline 2095static void noinline
1226periodics_reschedule (EV_P) 2096periodics_reschedule (EV_P)
1227{ 2097{
1228 int i; 2098 int i;
1229 2099
1230 /* adjust periodics after time jump */ 2100 /* adjust periodics after time jump */
1231 for (i = 0; i < periodiccnt; ++i) 2101 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1232 { 2102 {
1233 ev_periodic *w = periodics [i]; 2103 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1234 2104
1235 if (w->reschedule_cb) 2105 if (w->reschedule_cb)
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2106 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1237 else if (w->interval) 2107 else if (w->interval)
1238 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2108 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2109
2110 ANHE_at_cache (periodics [i]);
2111 }
2112
2113 reheap (periodics, periodiccnt);
2114}
2115#endif
2116
2117/* adjust all timers by a given offset */
2118static void noinline
2119timers_reschedule (EV_P_ ev_tstamp adjust)
2120{
2121 int i;
2122
2123 for (i = 0; i < timercnt; ++i)
1239 } 2124 {
1240 2125 ANHE *he = timers + i + HEAP0;
1241 /* now rebuild the heap */ 2126 ANHE_w (*he)->at += adjust;
1242 for (i = periodiccnt >> 1; i--; ) 2127 ANHE_at_cache (*he);
1243 downheap ((WT *)periodics, periodiccnt, i); 2128 }
1244} 2129}
1245#endif
1246 2130
1247int inline_size 2131/* fetch new monotonic and realtime times from the kernel */
1248time_update_monotonic (EV_P) 2132/* also detetc if there was a timejump, and act accordingly */
2133inline_speed void
2134time_update (EV_P_ ev_tstamp max_block)
1249{ 2135{
2136#if EV_USE_MONOTONIC
2137 if (expect_true (have_monotonic))
2138 {
2139 int i;
2140 ev_tstamp odiff = rtmn_diff;
2141
1250 mn_now = get_clock (); 2142 mn_now = get_clock ();
1251 2143
2144 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2145 /* interpolate in the meantime */
1252 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2146 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1253 { 2147 {
1254 ev_rt_now = rtmn_diff + mn_now; 2148 ev_rt_now = rtmn_diff + mn_now;
1255 return 0; 2149 return;
1256 } 2150 }
1257 else 2151
1258 {
1259 now_floor = mn_now; 2152 now_floor = mn_now;
1260 ev_rt_now = ev_time (); 2153 ev_rt_now = ev_time ();
1261 return 1;
1262 }
1263}
1264 2154
1265void inline_size 2155 /* loop a few times, before making important decisions.
1266time_update (EV_P) 2156 * on the choice of "4": one iteration isn't enough,
1267{ 2157 * in case we get preempted during the calls to
1268 int i; 2158 * ev_time and get_clock. a second call is almost guaranteed
1269 2159 * to succeed in that case, though. and looping a few more times
1270#if EV_USE_MONOTONIC 2160 * doesn't hurt either as we only do this on time-jumps or
1271 if (expect_true (have_monotonic)) 2161 * in the unlikely event of having been preempted here.
1272 { 2162 */
1273 if (time_update_monotonic (EV_A)) 2163 for (i = 4; --i; )
1274 { 2164 {
1275 ev_tstamp odiff = rtmn_diff;
1276
1277 /* loop a few times, before making important decisions.
1278 * on the choice of "4": one iteration isn't enough,
1279 * in case we get preempted during the calls to
1280 * ev_time and get_clock. a second call is almost guaranteed
1281 * to succeed in that case, though. and looping a few more times
1282 * doesn't hurt either as we only do this on time-jumps or
1283 * in the unlikely event of having been preempted here.
1284 */
1285 for (i = 4; --i; )
1286 {
1287 rtmn_diff = ev_rt_now - mn_now; 2165 rtmn_diff = ev_rt_now - mn_now;
1288 2166
1289 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2167 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1290 return; /* all is well */ 2168 return; /* all is well */
1291 2169
1292 ev_rt_now = ev_time (); 2170 ev_rt_now = ev_time ();
1293 mn_now = get_clock (); 2171 mn_now = get_clock ();
1294 now_floor = mn_now; 2172 now_floor = mn_now;
1295 } 2173 }
1296 2174
2175 /* no timer adjustment, as the monotonic clock doesn't jump */
2176 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1297# if EV_PERIODIC_ENABLE 2177# if EV_PERIODIC_ENABLE
1298 periodics_reschedule (EV_A); 2178 periodics_reschedule (EV_A);
1299# endif 2179# endif
1300 /* no timer adjustment, as the monotonic clock doesn't jump */
1301 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1302 }
1303 } 2180 }
1304 else 2181 else
1305#endif 2182#endif
1306 { 2183 {
1307 ev_rt_now = ev_time (); 2184 ev_rt_now = ev_time ();
1308 2185
1309 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2186 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1310 { 2187 {
2188 /* adjust timers. this is easy, as the offset is the same for all of them */
2189 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1311#if EV_PERIODIC_ENABLE 2190#if EV_PERIODIC_ENABLE
1312 periodics_reschedule (EV_A); 2191 periodics_reschedule (EV_A);
1313#endif 2192#endif
1314
1315 /* adjust timers. this is easy, as the offset is the same for all of them */
1316 for (i = 0; i < timercnt; ++i)
1317 ((WT)timers [i])->at += ev_rt_now - mn_now;
1318 } 2193 }
1319 2194
1320 mn_now = ev_rt_now; 2195 mn_now = ev_rt_now;
1321 } 2196 }
1322} 2197}
1323 2198
1324void 2199void
1325ev_ref (EV_P)
1326{
1327 ++activecnt;
1328}
1329
1330void
1331ev_unref (EV_P)
1332{
1333 --activecnt;
1334}
1335
1336static int loop_done;
1337
1338void
1339ev_loop (EV_P_ int flags) 2200ev_loop (EV_P_ int flags)
1340{ 2201{
1341 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2202#if EV_MINIMAL < 2
1342 ? EVUNLOOP_ONE 2203 ++loop_depth;
1343 : EVUNLOOP_CANCEL; 2204#endif
1344 2205
2206 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2207
2208 loop_done = EVUNLOOP_CANCEL;
2209
1345 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2210 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1346 2211
1347 do 2212 do
1348 { 2213 {
2214#if EV_VERIFY >= 2
2215 ev_loop_verify (EV_A);
2216#endif
2217
1349#ifndef _WIN32 2218#ifndef _WIN32
1350 if (expect_false (curpid)) /* penalise the forking check even more */ 2219 if (expect_false (curpid)) /* penalise the forking check even more */
1351 if (expect_false (getpid () != curpid)) 2220 if (expect_false (getpid () != curpid))
1352 { 2221 {
1353 curpid = getpid (); 2222 curpid = getpid ();
… …
1359 /* we might have forked, so queue fork handlers */ 2228 /* we might have forked, so queue fork handlers */
1360 if (expect_false (postfork)) 2229 if (expect_false (postfork))
1361 if (forkcnt) 2230 if (forkcnt)
1362 { 2231 {
1363 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2232 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1364 call_pending (EV_A); 2233 EV_INVOKE_PENDING;
1365 } 2234 }
1366#endif 2235#endif
1367 2236
1368 /* queue check watchers (and execute them) */ 2237 /* queue prepare watchers (and execute them) */
1369 if (expect_false (preparecnt)) 2238 if (expect_false (preparecnt))
1370 { 2239 {
1371 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2240 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1372 call_pending (EV_A); 2241 EV_INVOKE_PENDING;
1373 } 2242 }
1374 2243
1375 if (expect_false (!activecnt)) 2244 if (expect_false (loop_done))
1376 break; 2245 break;
1377 2246
1378 /* we might have forked, so reify kernel state if necessary */ 2247 /* we might have forked, so reify kernel state if necessary */
1379 if (expect_false (postfork)) 2248 if (expect_false (postfork))
1380 loop_fork (EV_A); 2249 loop_fork (EV_A);
… …
1382 /* update fd-related kernel structures */ 2251 /* update fd-related kernel structures */
1383 fd_reify (EV_A); 2252 fd_reify (EV_A);
1384 2253
1385 /* calculate blocking time */ 2254 /* calculate blocking time */
1386 { 2255 {
1387 ev_tstamp block; 2256 ev_tstamp waittime = 0.;
2257 ev_tstamp sleeptime = 0.;
1388 2258
1389 if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt)) 2259 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1390 block = 0.; /* do not block at all */
1391 else
1392 { 2260 {
2261 /* remember old timestamp for io_blocktime calculation */
2262 ev_tstamp prev_mn_now = mn_now;
2263
1393 /* update time to cancel out callback processing overhead */ 2264 /* update time to cancel out callback processing overhead */
1394#if EV_USE_MONOTONIC
1395 if (expect_true (have_monotonic))
1396 time_update_monotonic (EV_A); 2265 time_update (EV_A_ 1e100);
1397 else
1398#endif
1399 {
1400 ev_rt_now = ev_time ();
1401 mn_now = ev_rt_now;
1402 }
1403 2266
1404 block = MAX_BLOCKTIME; 2267 waittime = MAX_BLOCKTIME;
1405 2268
1406 if (timercnt) 2269 if (timercnt)
1407 { 2270 {
1408 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2271 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1409 if (block > to) block = to; 2272 if (waittime > to) waittime = to;
1410 } 2273 }
1411 2274
1412#if EV_PERIODIC_ENABLE 2275#if EV_PERIODIC_ENABLE
1413 if (periodiccnt) 2276 if (periodiccnt)
1414 { 2277 {
1415 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2278 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1416 if (block > to) block = to; 2279 if (waittime > to) waittime = to;
1417 } 2280 }
1418#endif 2281#endif
1419 2282
2283 /* don't let timeouts decrease the waittime below timeout_blocktime */
2284 if (expect_false (waittime < timeout_blocktime))
2285 waittime = timeout_blocktime;
2286
2287 /* extra check because io_blocktime is commonly 0 */
1420 if (expect_false (block < 0.)) block = 0.; 2288 if (expect_false (io_blocktime))
2289 {
2290 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2291
2292 if (sleeptime > waittime - backend_fudge)
2293 sleeptime = waittime - backend_fudge;
2294
2295 if (expect_true (sleeptime > 0.))
2296 {
2297 ev_sleep (sleeptime);
2298 waittime -= sleeptime;
2299 }
2300 }
1421 } 2301 }
1422 2302
2303#if EV_MINIMAL < 2
2304 ++loop_count;
2305#endif
2306 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1423 backend_poll (EV_A_ block); 2307 backend_poll (EV_A_ waittime);
2308 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2309
2310 /* update ev_rt_now, do magic */
2311 time_update (EV_A_ waittime + sleeptime);
1424 } 2312 }
1425
1426 /* update ev_rt_now, do magic */
1427 time_update (EV_A);
1428 2313
1429 /* queue pending timers and reschedule them */ 2314 /* queue pending timers and reschedule them */
1430 timers_reify (EV_A); /* relative timers called last */ 2315 timers_reify (EV_A); /* relative timers called last */
1431#if EV_PERIODIC_ENABLE 2316#if EV_PERIODIC_ENABLE
1432 periodics_reify (EV_A); /* absolute timers called first */ 2317 periodics_reify (EV_A); /* absolute timers called first */
1433#endif 2318#endif
1434 2319
2320#if EV_IDLE_ENABLE
1435 /* queue idle watchers unless other events are pending */ 2321 /* queue idle watchers unless other events are pending */
1436 if (idlecnt && !any_pending (EV_A)) 2322 idle_reify (EV_A);
1437 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2323#endif
1438 2324
1439 /* queue check watchers, to be executed first */ 2325 /* queue check watchers, to be executed first */
1440 if (expect_false (checkcnt)) 2326 if (expect_false (checkcnt))
1441 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2327 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1442 2328
1443 call_pending (EV_A); 2329 EV_INVOKE_PENDING;
1444
1445 } 2330 }
1446 while (expect_true (activecnt && !loop_done)); 2331 while (expect_true (
2332 activecnt
2333 && !loop_done
2334 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2335 ));
1447 2336
1448 if (loop_done == EVUNLOOP_ONE) 2337 if (loop_done == EVUNLOOP_ONE)
1449 loop_done = EVUNLOOP_CANCEL; 2338 loop_done = EVUNLOOP_CANCEL;
2339
2340#if EV_MINIMAL < 2
2341 --loop_depth;
2342#endif
1450} 2343}
1451 2344
1452void 2345void
1453ev_unloop (EV_P_ int how) 2346ev_unloop (EV_P_ int how)
1454{ 2347{
1455 loop_done = how; 2348 loop_done = how;
1456} 2349}
1457 2350
2351void
2352ev_ref (EV_P)
2353{
2354 ++activecnt;
2355}
2356
2357void
2358ev_unref (EV_P)
2359{
2360 --activecnt;
2361}
2362
2363void
2364ev_now_update (EV_P)
2365{
2366 time_update (EV_A_ 1e100);
2367}
2368
2369void
2370ev_suspend (EV_P)
2371{
2372 ev_now_update (EV_A);
2373}
2374
2375void
2376ev_resume (EV_P)
2377{
2378 ev_tstamp mn_prev = mn_now;
2379
2380 ev_now_update (EV_A);
2381 timers_reschedule (EV_A_ mn_now - mn_prev);
2382#if EV_PERIODIC_ENABLE
2383 /* TODO: really do this? */
2384 periodics_reschedule (EV_A);
2385#endif
2386}
2387
1458/*****************************************************************************/ 2388/*****************************************************************************/
2389/* singly-linked list management, used when the expected list length is short */
1459 2390
1460void inline_size 2391inline_size void
1461wlist_add (WL *head, WL elem) 2392wlist_add (WL *head, WL elem)
1462{ 2393{
1463 elem->next = *head; 2394 elem->next = *head;
1464 *head = elem; 2395 *head = elem;
1465} 2396}
1466 2397
1467void inline_size 2398inline_size void
1468wlist_del (WL *head, WL elem) 2399wlist_del (WL *head, WL elem)
1469{ 2400{
1470 while (*head) 2401 while (*head)
1471 { 2402 {
1472 if (*head == elem) 2403 if (expect_true (*head == elem))
1473 { 2404 {
1474 *head = elem->next; 2405 *head = elem->next;
1475 return; 2406 break;
1476 } 2407 }
1477 2408
1478 head = &(*head)->next; 2409 head = &(*head)->next;
1479 } 2410 }
1480} 2411}
1481 2412
1482void inline_speed 2413/* internal, faster, version of ev_clear_pending */
2414inline_speed void
1483ev_clear_pending (EV_P_ W w) 2415clear_pending (EV_P_ W w)
1484{ 2416{
1485 if (w->pending) 2417 if (w->pending)
1486 { 2418 {
1487 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2419 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1488 w->pending = 0; 2420 w->pending = 0;
1489 } 2421 }
1490} 2422}
1491 2423
1492void inline_speed 2424int
2425ev_clear_pending (EV_P_ void *w)
2426{
2427 W w_ = (W)w;
2428 int pending = w_->pending;
2429
2430 if (expect_true (pending))
2431 {
2432 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2433 p->w = (W)&pending_w;
2434 w_->pending = 0;
2435 return p->events;
2436 }
2437 else
2438 return 0;
2439}
2440
2441inline_size void
2442pri_adjust (EV_P_ W w)
2443{
2444 int pri = ev_priority (w);
2445 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2446 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2447 ev_set_priority (w, pri);
2448}
2449
2450inline_speed void
1493ev_start (EV_P_ W w, int active) 2451ev_start (EV_P_ W w, int active)
1494{ 2452{
1495 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2453 pri_adjust (EV_A_ w);
1496 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1497
1498 w->active = active; 2454 w->active = active;
1499 ev_ref (EV_A); 2455 ev_ref (EV_A);
1500} 2456}
1501 2457
1502void inline_size 2458inline_size void
1503ev_stop (EV_P_ W w) 2459ev_stop (EV_P_ W w)
1504{ 2460{
1505 ev_unref (EV_A); 2461 ev_unref (EV_A);
1506 w->active = 0; 2462 w->active = 0;
1507} 2463}
1508 2464
1509/*****************************************************************************/ 2465/*****************************************************************************/
1510 2466
1511void 2467void noinline
1512ev_io_start (EV_P_ ev_io *w) 2468ev_io_start (EV_P_ ev_io *w)
1513{ 2469{
1514 int fd = w->fd; 2470 int fd = w->fd;
1515 2471
1516 if (expect_false (ev_is_active (w))) 2472 if (expect_false (ev_is_active (w)))
1517 return; 2473 return;
1518 2474
1519 assert (("ev_io_start called with negative fd", fd >= 0)); 2475 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2476 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2477
2478 EV_FREQUENT_CHECK;
1520 2479
1521 ev_start (EV_A_ (W)w, 1); 2480 ev_start (EV_A_ (W)w, 1);
1522 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2481 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1523 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2482 wlist_add (&anfds[fd].head, (WL)w);
1524 2483
1525 fd_change (EV_A_ fd); 2484 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1526} 2485 w->events &= ~EV__IOFDSET;
1527 2486
1528void 2487 EV_FREQUENT_CHECK;
2488}
2489
2490void noinline
1529ev_io_stop (EV_P_ ev_io *w) 2491ev_io_stop (EV_P_ ev_io *w)
1530{ 2492{
1531 ev_clear_pending (EV_A_ (W)w); 2493 clear_pending (EV_A_ (W)w);
1532 if (expect_false (!ev_is_active (w))) 2494 if (expect_false (!ev_is_active (w)))
1533 return; 2495 return;
1534 2496
1535 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2497 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1536 2498
2499 EV_FREQUENT_CHECK;
2500
1537 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2501 wlist_del (&anfds[w->fd].head, (WL)w);
1538 ev_stop (EV_A_ (W)w); 2502 ev_stop (EV_A_ (W)w);
1539 2503
1540 fd_change (EV_A_ w->fd); 2504 fd_change (EV_A_ w->fd, 1);
1541}
1542 2505
1543void 2506 EV_FREQUENT_CHECK;
2507}
2508
2509void noinline
1544ev_timer_start (EV_P_ ev_timer *w) 2510ev_timer_start (EV_P_ ev_timer *w)
1545{ 2511{
1546 if (expect_false (ev_is_active (w))) 2512 if (expect_false (ev_is_active (w)))
1547 return; 2513 return;
1548 2514
1549 ((WT)w)->at += mn_now; 2515 ev_at (w) += mn_now;
1550 2516
1551 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2517 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1552 2518
2519 EV_FREQUENT_CHECK;
2520
2521 ++timercnt;
1553 ev_start (EV_A_ (W)w, ++timercnt); 2522 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1554 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2523 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1555 timers [timercnt - 1] = w; 2524 ANHE_w (timers [ev_active (w)]) = (WT)w;
1556 upheap ((WT *)timers, timercnt - 1); 2525 ANHE_at_cache (timers [ev_active (w)]);
2526 upheap (timers, ev_active (w));
1557 2527
2528 EV_FREQUENT_CHECK;
2529
1558 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2530 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1559} 2531}
1560 2532
1561void 2533void noinline
1562ev_timer_stop (EV_P_ ev_timer *w) 2534ev_timer_stop (EV_P_ ev_timer *w)
1563{ 2535{
1564 ev_clear_pending (EV_A_ (W)w); 2536 clear_pending (EV_A_ (W)w);
1565 if (expect_false (!ev_is_active (w))) 2537 if (expect_false (!ev_is_active (w)))
1566 return; 2538 return;
1567 2539
1568 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2540 EV_FREQUENT_CHECK;
1569 2541
1570 { 2542 {
1571 int active = ((W)w)->active; 2543 int active = ev_active (w);
1572 2544
2545 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2546
2547 --timercnt;
2548
1573 if (expect_true (--active < --timercnt)) 2549 if (expect_true (active < timercnt + HEAP0))
1574 { 2550 {
1575 timers [active] = timers [timercnt]; 2551 timers [active] = timers [timercnt + HEAP0];
1576 adjustheap ((WT *)timers, timercnt, active); 2552 adjustheap (timers, timercnt, active);
1577 } 2553 }
1578 } 2554 }
1579 2555
1580 ((WT)w)->at -= mn_now; 2556 EV_FREQUENT_CHECK;
2557
2558 ev_at (w) -= mn_now;
1581 2559
1582 ev_stop (EV_A_ (W)w); 2560 ev_stop (EV_A_ (W)w);
1583} 2561}
1584 2562
1585void 2563void noinline
1586ev_timer_again (EV_P_ ev_timer *w) 2564ev_timer_again (EV_P_ ev_timer *w)
1587{ 2565{
2566 EV_FREQUENT_CHECK;
2567
1588 if (ev_is_active (w)) 2568 if (ev_is_active (w))
1589 { 2569 {
1590 if (w->repeat) 2570 if (w->repeat)
1591 { 2571 {
1592 ((WT)w)->at = mn_now + w->repeat; 2572 ev_at (w) = mn_now + w->repeat;
2573 ANHE_at_cache (timers [ev_active (w)]);
1593 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2574 adjustheap (timers, timercnt, ev_active (w));
1594 } 2575 }
1595 else 2576 else
1596 ev_timer_stop (EV_A_ w); 2577 ev_timer_stop (EV_A_ w);
1597 } 2578 }
1598 else if (w->repeat) 2579 else if (w->repeat)
1599 { 2580 {
1600 w->at = w->repeat; 2581 ev_at (w) = w->repeat;
1601 ev_timer_start (EV_A_ w); 2582 ev_timer_start (EV_A_ w);
1602 } 2583 }
2584
2585 EV_FREQUENT_CHECK;
2586}
2587
2588ev_tstamp
2589ev_timer_remaining (EV_P_ ev_timer *w)
2590{
2591 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1603} 2592}
1604 2593
1605#if EV_PERIODIC_ENABLE 2594#if EV_PERIODIC_ENABLE
1606void 2595void noinline
1607ev_periodic_start (EV_P_ ev_periodic *w) 2596ev_periodic_start (EV_P_ ev_periodic *w)
1608{ 2597{
1609 if (expect_false (ev_is_active (w))) 2598 if (expect_false (ev_is_active (w)))
1610 return; 2599 return;
1611 2600
1612 if (w->reschedule_cb) 2601 if (w->reschedule_cb)
1613 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2602 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1614 else if (w->interval) 2603 else if (w->interval)
1615 { 2604 {
1616 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2605 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1617 /* this formula differs from the one in periodic_reify because we do not always round up */ 2606 /* this formula differs from the one in periodic_reify because we do not always round up */
1618 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2607 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1619 } 2608 }
2609 else
2610 ev_at (w) = w->offset;
1620 2611
2612 EV_FREQUENT_CHECK;
2613
2614 ++periodiccnt;
1621 ev_start (EV_A_ (W)w, ++periodiccnt); 2615 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1622 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2616 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1623 periodics [periodiccnt - 1] = w; 2617 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1624 upheap ((WT *)periodics, periodiccnt - 1); 2618 ANHE_at_cache (periodics [ev_active (w)]);
2619 upheap (periodics, ev_active (w));
1625 2620
2621 EV_FREQUENT_CHECK;
2622
1626 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2623 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1627} 2624}
1628 2625
1629void 2626void noinline
1630ev_periodic_stop (EV_P_ ev_periodic *w) 2627ev_periodic_stop (EV_P_ ev_periodic *w)
1631{ 2628{
1632 ev_clear_pending (EV_A_ (W)w); 2629 clear_pending (EV_A_ (W)w);
1633 if (expect_false (!ev_is_active (w))) 2630 if (expect_false (!ev_is_active (w)))
1634 return; 2631 return;
1635 2632
1636 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2633 EV_FREQUENT_CHECK;
1637 2634
1638 { 2635 {
1639 int active = ((W)w)->active; 2636 int active = ev_active (w);
1640 2637
2638 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2639
2640 --periodiccnt;
2641
1641 if (expect_true (--active < --periodiccnt)) 2642 if (expect_true (active < periodiccnt + HEAP0))
1642 { 2643 {
1643 periodics [active] = periodics [periodiccnt]; 2644 periodics [active] = periodics [periodiccnt + HEAP0];
1644 adjustheap ((WT *)periodics, periodiccnt, active); 2645 adjustheap (periodics, periodiccnt, active);
1645 } 2646 }
1646 } 2647 }
1647 2648
2649 EV_FREQUENT_CHECK;
2650
1648 ev_stop (EV_A_ (W)w); 2651 ev_stop (EV_A_ (W)w);
1649} 2652}
1650 2653
1651void 2654void noinline
1652ev_periodic_again (EV_P_ ev_periodic *w) 2655ev_periodic_again (EV_P_ ev_periodic *w)
1653{ 2656{
1654 /* TODO: use adjustheap and recalculation */ 2657 /* TODO: use adjustheap and recalculation */
1655 ev_periodic_stop (EV_A_ w); 2658 ev_periodic_stop (EV_A_ w);
1656 ev_periodic_start (EV_A_ w); 2659 ev_periodic_start (EV_A_ w);
… …
1659 2662
1660#ifndef SA_RESTART 2663#ifndef SA_RESTART
1661# define SA_RESTART 0 2664# define SA_RESTART 0
1662#endif 2665#endif
1663 2666
1664void 2667void noinline
1665ev_signal_start (EV_P_ ev_signal *w) 2668ev_signal_start (EV_P_ ev_signal *w)
1666{ 2669{
1667#if EV_MULTIPLICITY
1668 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1669#endif
1670 if (expect_false (ev_is_active (w))) 2670 if (expect_false (ev_is_active (w)))
1671 return; 2671 return;
1672 2672
1673 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2673 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2674
2675#if EV_MULTIPLICITY
2676 assert (("libev: a signal must not be attached to two different loops",
2677 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2678
2679 signals [w->signum - 1].loop = EV_A;
2680#endif
2681
2682 EV_FREQUENT_CHECK;
2683
2684#if EV_USE_SIGNALFD
2685 if (sigfd == -2)
2686 {
2687 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2688 if (sigfd < 0 && errno == EINVAL)
2689 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2690
2691 if (sigfd >= 0)
2692 {
2693 fd_intern (sigfd); /* doing it twice will not hurt */
2694
2695 sigemptyset (&sigfd_set);
2696
2697 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2698 ev_set_priority (&sigfd_w, EV_MAXPRI);
2699 ev_io_start (EV_A_ &sigfd_w);
2700 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2701 }
2702 }
2703
2704 if (sigfd >= 0)
2705 {
2706 /* TODO: check .head */
2707 sigaddset (&sigfd_set, w->signum);
2708 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2709
2710 signalfd (sigfd, &sigfd_set, 0);
2711 }
2712#endif
1674 2713
1675 ev_start (EV_A_ (W)w, 1); 2714 ev_start (EV_A_ (W)w, 1);
1676 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1677 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2715 wlist_add (&signals [w->signum - 1].head, (WL)w);
1678 2716
1679 if (!((WL)w)->next) 2717 if (!((WL)w)->next)
2718# if EV_USE_SIGNALFD
2719 if (sigfd < 0) /*TODO*/
2720# endif
1680 { 2721 {
1681#if _WIN32 2722# if _WIN32
1682 signal (w->signum, sighandler); 2723 signal (w->signum, ev_sighandler);
1683#else 2724# else
1684 struct sigaction sa; 2725 struct sigaction sa;
2726
2727 evpipe_init (EV_A);
2728
1685 sa.sa_handler = sighandler; 2729 sa.sa_handler = ev_sighandler;
1686 sigfillset (&sa.sa_mask); 2730 sigfillset (&sa.sa_mask);
1687 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2731 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1688 sigaction (w->signum, &sa, 0); 2732 sigaction (w->signum, &sa, 0);
2733
2734 sigemptyset (&sa.sa_mask);
2735 sigaddset (&sa.sa_mask, w->signum);
2736 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
1689#endif 2737#endif
1690 } 2738 }
1691}
1692 2739
1693void 2740 EV_FREQUENT_CHECK;
2741}
2742
2743void noinline
1694ev_signal_stop (EV_P_ ev_signal *w) 2744ev_signal_stop (EV_P_ ev_signal *w)
1695{ 2745{
1696 ev_clear_pending (EV_A_ (W)w); 2746 clear_pending (EV_A_ (W)w);
1697 if (expect_false (!ev_is_active (w))) 2747 if (expect_false (!ev_is_active (w)))
1698 return; 2748 return;
1699 2749
2750 EV_FREQUENT_CHECK;
2751
1700 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2752 wlist_del (&signals [w->signum - 1].head, (WL)w);
1701 ev_stop (EV_A_ (W)w); 2753 ev_stop (EV_A_ (W)w);
1702 2754
1703 if (!signals [w->signum - 1].head) 2755 if (!signals [w->signum - 1].head)
2756 {
2757#if EV_MULTIPLICITY
2758 signals [w->signum - 1].loop = 0; /* unattach from signal */
2759#endif
2760#if EV_USE_SIGNALFD
2761 if (sigfd >= 0)
2762 {
2763 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2764 sigdelset (&sigfd_set, w->signum);
2765 signalfd (sigfd, &sigfd_set, 0);
2766 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2767 /*TODO: maybe unblock signal? */
2768 }
2769 else
2770#endif
1704 signal (w->signum, SIG_DFL); 2771 signal (w->signum, SIG_DFL);
2772 }
2773
2774 EV_FREQUENT_CHECK;
1705} 2775}
1706 2776
1707void 2777void
1708ev_child_start (EV_P_ ev_child *w) 2778ev_child_start (EV_P_ ev_child *w)
1709{ 2779{
1710#if EV_MULTIPLICITY 2780#if EV_MULTIPLICITY
1711 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2781 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1712#endif 2782#endif
1713 if (expect_false (ev_is_active (w))) 2783 if (expect_false (ev_is_active (w)))
1714 return; 2784 return;
1715 2785
2786 EV_FREQUENT_CHECK;
2787
1716 ev_start (EV_A_ (W)w, 1); 2788 ev_start (EV_A_ (W)w, 1);
1717 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2789 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2790
2791 EV_FREQUENT_CHECK;
1718} 2792}
1719 2793
1720void 2794void
1721ev_child_stop (EV_P_ ev_child *w) 2795ev_child_stop (EV_P_ ev_child *w)
1722{ 2796{
1723 ev_clear_pending (EV_A_ (W)w); 2797 clear_pending (EV_A_ (W)w);
1724 if (expect_false (!ev_is_active (w))) 2798 if (expect_false (!ev_is_active (w)))
1725 return; 2799 return;
1726 2800
2801 EV_FREQUENT_CHECK;
2802
1727 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2803 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1728 ev_stop (EV_A_ (W)w); 2804 ev_stop (EV_A_ (W)w);
2805
2806 EV_FREQUENT_CHECK;
1729} 2807}
1730 2808
1731#if EV_STAT_ENABLE 2809#if EV_STAT_ENABLE
1732 2810
1733# ifdef _WIN32 2811# ifdef _WIN32
1734# undef lstat 2812# undef lstat
1735# define lstat(a,b) _stati64 (a,b) 2813# define lstat(a,b) _stati64 (a,b)
1736# endif 2814# endif
1737 2815
1738#define DEF_STAT_INTERVAL 5.0074891 2816#define DEF_STAT_INTERVAL 5.0074891
2817#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1739#define MIN_STAT_INTERVAL 0.1074891 2818#define MIN_STAT_INTERVAL 0.1074891
1740 2819
1741static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2820static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1742 2821
1743#if EV_USE_INOTIFY 2822#if EV_USE_INOTIFY
1744# define EV_INOTIFY_BUFSIZE 8192 2823# define EV_INOTIFY_BUFSIZE 8192
… …
1748{ 2827{
1749 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); 2828 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);
1750 2829
1751 if (w->wd < 0) 2830 if (w->wd < 0)
1752 { 2831 {
2832 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1753 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2833 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1754 2834
1755 /* monitor some parent directory for speedup hints */ 2835 /* monitor some parent directory for speedup hints */
2836 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2837 /* but an efficiency issue only */
1756 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2838 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1757 { 2839 {
1758 char path [4096]; 2840 char path [4096];
1759 strcpy (path, w->path); 2841 strcpy (path, w->path);
1760 2842
… …
1763 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2845 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1764 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2846 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1765 2847
1766 char *pend = strrchr (path, '/'); 2848 char *pend = strrchr (path, '/');
1767 2849
1768 if (!pend) 2850 if (!pend || pend == path)
1769 break; /* whoops, no '/', complain to your admin */ 2851 break;
1770 2852
1771 *pend = 0; 2853 *pend = 0;
1772 w->wd = inotify_add_watch (fs_fd, path, mask); 2854 w->wd = inotify_add_watch (fs_fd, path, mask);
1773 } 2855 }
1774 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2856 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1775 } 2857 }
1776 } 2858 }
1777 else
1778 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1779 2859
1780 if (w->wd >= 0) 2860 if (w->wd >= 0)
2861 {
1781 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2862 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2863
2864 /* now local changes will be tracked by inotify, but remote changes won't */
2865 /* unless the filesystem it known to be local, we therefore still poll */
2866 /* also do poll on <2.6.25, but with normal frequency */
2867 struct statfs sfs;
2868
2869 if (fs_2625 && !statfs (w->path, &sfs))
2870 if (sfs.f_type == 0x1373 /* devfs */
2871 || sfs.f_type == 0xEF53 /* ext2/3 */
2872 || sfs.f_type == 0x3153464a /* jfs */
2873 || sfs.f_type == 0x52654973 /* reiser3 */
2874 || sfs.f_type == 0x01021994 /* tempfs */
2875 || sfs.f_type == 0x58465342 /* xfs */)
2876 return;
2877
2878 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2879 ev_timer_again (EV_A_ &w->timer);
2880 }
1782} 2881}
1783 2882
1784static void noinline 2883static void noinline
1785infy_del (EV_P_ ev_stat *w) 2884infy_del (EV_P_ ev_stat *w)
1786{ 2885{
… …
1800 2899
1801static void noinline 2900static void noinline
1802infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2901infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1803{ 2902{
1804 if (slot < 0) 2903 if (slot < 0)
1805 /* overflow, need to check for all hahs slots */ 2904 /* overflow, need to check for all hash slots */
1806 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2905 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1807 infy_wd (EV_A_ slot, wd, ev); 2906 infy_wd (EV_A_ slot, wd, ev);
1808 else 2907 else
1809 { 2908 {
1810 WL w_; 2909 WL w_;
… …
1816 2915
1817 if (w->wd == wd || wd == -1) 2916 if (w->wd == wd || wd == -1)
1818 { 2917 {
1819 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2918 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1820 { 2919 {
2920 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1821 w->wd = -1; 2921 w->wd = -1;
1822 infy_add (EV_A_ w); /* re-add, no matter what */ 2922 infy_add (EV_A_ w); /* re-add, no matter what */
1823 } 2923 }
1824 2924
1825 stat_timer_cb (EV_A_ &w->timer, 0); 2925 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1838 2938
1839 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2939 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1840 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2940 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1841} 2941}
1842 2942
1843void inline_size 2943inline_size void
2944check_2625 (EV_P)
2945{
2946 /* kernels < 2.6.25 are borked
2947 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2948 */
2949 struct utsname buf;
2950 int major, minor, micro;
2951
2952 if (uname (&buf))
2953 return;
2954
2955 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2956 return;
2957
2958 if (major < 2
2959 || (major == 2 && minor < 6)
2960 || (major == 2 && minor == 6 && micro < 25))
2961 return;
2962
2963 fs_2625 = 1;
2964}
2965
2966inline_size void
1844infy_init (EV_P) 2967infy_init (EV_P)
1845{ 2968{
1846 if (fs_fd != -2) 2969 if (fs_fd != -2)
1847 return; 2970 return;
2971
2972 fs_fd = -1;
2973
2974 check_2625 (EV_A);
1848 2975
1849 fs_fd = inotify_init (); 2976 fs_fd = inotify_init ();
1850 2977
1851 if (fs_fd >= 0) 2978 if (fs_fd >= 0)
1852 { 2979 {
… …
1854 ev_set_priority (&fs_w, EV_MAXPRI); 2981 ev_set_priority (&fs_w, EV_MAXPRI);
1855 ev_io_start (EV_A_ &fs_w); 2982 ev_io_start (EV_A_ &fs_w);
1856 } 2983 }
1857} 2984}
1858 2985
1859void inline_size 2986inline_size void
1860infy_fork (EV_P) 2987infy_fork (EV_P)
1861{ 2988{
1862 int slot; 2989 int slot;
1863 2990
1864 if (fs_fd < 0) 2991 if (fs_fd < 0)
… …
1880 w->wd = -1; 3007 w->wd = -1;
1881 3008
1882 if (fs_fd >= 0) 3009 if (fs_fd >= 0)
1883 infy_add (EV_A_ w); /* re-add, no matter what */ 3010 infy_add (EV_A_ w); /* re-add, no matter what */
1884 else 3011 else
1885 ev_timer_start (EV_A_ &w->timer); 3012 ev_timer_again (EV_A_ &w->timer);
1886 } 3013 }
1887
1888 } 3014 }
1889} 3015}
1890 3016
3017#endif
3018
3019#ifdef _WIN32
3020# define EV_LSTAT(p,b) _stati64 (p, b)
3021#else
3022# define EV_LSTAT(p,b) lstat (p, b)
1891#endif 3023#endif
1892 3024
1893void 3025void
1894ev_stat_stat (EV_P_ ev_stat *w) 3026ev_stat_stat (EV_P_ ev_stat *w)
1895{ 3027{
… …
1922 || w->prev.st_atime != w->attr.st_atime 3054 || w->prev.st_atime != w->attr.st_atime
1923 || w->prev.st_mtime != w->attr.st_mtime 3055 || w->prev.st_mtime != w->attr.st_mtime
1924 || w->prev.st_ctime != w->attr.st_ctime 3056 || w->prev.st_ctime != w->attr.st_ctime
1925 ) { 3057 ) {
1926 #if EV_USE_INOTIFY 3058 #if EV_USE_INOTIFY
3059 if (fs_fd >= 0)
3060 {
1927 infy_del (EV_A_ w); 3061 infy_del (EV_A_ w);
1928 infy_add (EV_A_ w); 3062 infy_add (EV_A_ w);
1929 ev_stat_stat (EV_A_ w); /* avoid race... */ 3063 ev_stat_stat (EV_A_ w); /* avoid race... */
3064 }
1930 #endif 3065 #endif
1931 3066
1932 ev_feed_event (EV_A_ w, EV_STAT); 3067 ev_feed_event (EV_A_ w, EV_STAT);
1933 } 3068 }
1934} 3069}
… …
1937ev_stat_start (EV_P_ ev_stat *w) 3072ev_stat_start (EV_P_ ev_stat *w)
1938{ 3073{
1939 if (expect_false (ev_is_active (w))) 3074 if (expect_false (ev_is_active (w)))
1940 return; 3075 return;
1941 3076
1942 /* since we use memcmp, we need to clear any padding data etc. */
1943 memset (&w->prev, 0, sizeof (ev_statdata));
1944 memset (&w->attr, 0, sizeof (ev_statdata));
1945
1946 ev_stat_stat (EV_A_ w); 3077 ev_stat_stat (EV_A_ w);
1947 3078
3079 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1948 if (w->interval < MIN_STAT_INTERVAL) 3080 w->interval = MIN_STAT_INTERVAL;
1949 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1950 3081
1951 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3082 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1952 ev_set_priority (&w->timer, ev_priority (w)); 3083 ev_set_priority (&w->timer, ev_priority (w));
1953 3084
1954#if EV_USE_INOTIFY 3085#if EV_USE_INOTIFY
1955 infy_init (EV_A); 3086 infy_init (EV_A);
1956 3087
1957 if (fs_fd >= 0) 3088 if (fs_fd >= 0)
1958 infy_add (EV_A_ w); 3089 infy_add (EV_A_ w);
1959 else 3090 else
1960#endif 3091#endif
1961 ev_timer_start (EV_A_ &w->timer); 3092 ev_timer_again (EV_A_ &w->timer);
1962 3093
1963 ev_start (EV_A_ (W)w, 1); 3094 ev_start (EV_A_ (W)w, 1);
3095
3096 EV_FREQUENT_CHECK;
1964} 3097}
1965 3098
1966void 3099void
1967ev_stat_stop (EV_P_ ev_stat *w) 3100ev_stat_stop (EV_P_ ev_stat *w)
1968{ 3101{
1969 ev_clear_pending (EV_A_ (W)w); 3102 clear_pending (EV_A_ (W)w);
1970 if (expect_false (!ev_is_active (w))) 3103 if (expect_false (!ev_is_active (w)))
1971 return; 3104 return;
1972 3105
3106 EV_FREQUENT_CHECK;
3107
1973#if EV_USE_INOTIFY 3108#if EV_USE_INOTIFY
1974 infy_del (EV_A_ w); 3109 infy_del (EV_A_ w);
1975#endif 3110#endif
1976 ev_timer_stop (EV_A_ &w->timer); 3111 ev_timer_stop (EV_A_ &w->timer);
1977 3112
1978 ev_stop (EV_A_ (W)w); 3113 ev_stop (EV_A_ (W)w);
1979}
1980#endif
1981 3114
3115 EV_FREQUENT_CHECK;
3116}
3117#endif
3118
3119#if EV_IDLE_ENABLE
1982void 3120void
1983ev_idle_start (EV_P_ ev_idle *w) 3121ev_idle_start (EV_P_ ev_idle *w)
1984{ 3122{
1985 if (expect_false (ev_is_active (w))) 3123 if (expect_false (ev_is_active (w)))
1986 return; 3124 return;
1987 3125
3126 pri_adjust (EV_A_ (W)w);
3127
3128 EV_FREQUENT_CHECK;
3129
3130 {
3131 int active = ++idlecnt [ABSPRI (w)];
3132
3133 ++idleall;
1988 ev_start (EV_A_ (W)w, ++idlecnt); 3134 ev_start (EV_A_ (W)w, active);
3135
1989 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3136 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1990 idles [idlecnt - 1] = w; 3137 idles [ABSPRI (w)][active - 1] = w;
3138 }
3139
3140 EV_FREQUENT_CHECK;
1991} 3141}
1992 3142
1993void 3143void
1994ev_idle_stop (EV_P_ ev_idle *w) 3144ev_idle_stop (EV_P_ ev_idle *w)
1995{ 3145{
1996 ev_clear_pending (EV_A_ (W)w); 3146 clear_pending (EV_A_ (W)w);
1997 if (expect_false (!ev_is_active (w))) 3147 if (expect_false (!ev_is_active (w)))
1998 return; 3148 return;
1999 3149
3150 EV_FREQUENT_CHECK;
3151
2000 { 3152 {
2001 int active = ((W)w)->active; 3153 int active = ev_active (w);
2002 idles [active - 1] = idles [--idlecnt]; 3154
2003 ((W)idles [active - 1])->active = active; 3155 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3156 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3157
3158 ev_stop (EV_A_ (W)w);
3159 --idleall;
2004 } 3160 }
2005 3161
2006 ev_stop (EV_A_ (W)w); 3162 EV_FREQUENT_CHECK;
2007} 3163}
3164#endif
2008 3165
2009void 3166void
2010ev_prepare_start (EV_P_ ev_prepare *w) 3167ev_prepare_start (EV_P_ ev_prepare *w)
2011{ 3168{
2012 if (expect_false (ev_is_active (w))) 3169 if (expect_false (ev_is_active (w)))
2013 return; 3170 return;
3171
3172 EV_FREQUENT_CHECK;
2014 3173
2015 ev_start (EV_A_ (W)w, ++preparecnt); 3174 ev_start (EV_A_ (W)w, ++preparecnt);
2016 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3175 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2017 prepares [preparecnt - 1] = w; 3176 prepares [preparecnt - 1] = w;
3177
3178 EV_FREQUENT_CHECK;
2018} 3179}
2019 3180
2020void 3181void
2021ev_prepare_stop (EV_P_ ev_prepare *w) 3182ev_prepare_stop (EV_P_ ev_prepare *w)
2022{ 3183{
2023 ev_clear_pending (EV_A_ (W)w); 3184 clear_pending (EV_A_ (W)w);
2024 if (expect_false (!ev_is_active (w))) 3185 if (expect_false (!ev_is_active (w)))
2025 return; 3186 return;
2026 3187
3188 EV_FREQUENT_CHECK;
3189
2027 { 3190 {
2028 int active = ((W)w)->active; 3191 int active = ev_active (w);
3192
2029 prepares [active - 1] = prepares [--preparecnt]; 3193 prepares [active - 1] = prepares [--preparecnt];
2030 ((W)prepares [active - 1])->active = active; 3194 ev_active (prepares [active - 1]) = active;
2031 } 3195 }
2032 3196
2033 ev_stop (EV_A_ (W)w); 3197 ev_stop (EV_A_ (W)w);
3198
3199 EV_FREQUENT_CHECK;
2034} 3200}
2035 3201
2036void 3202void
2037ev_check_start (EV_P_ ev_check *w) 3203ev_check_start (EV_P_ ev_check *w)
2038{ 3204{
2039 if (expect_false (ev_is_active (w))) 3205 if (expect_false (ev_is_active (w)))
2040 return; 3206 return;
3207
3208 EV_FREQUENT_CHECK;
2041 3209
2042 ev_start (EV_A_ (W)w, ++checkcnt); 3210 ev_start (EV_A_ (W)w, ++checkcnt);
2043 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3211 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2044 checks [checkcnt - 1] = w; 3212 checks [checkcnt - 1] = w;
3213
3214 EV_FREQUENT_CHECK;
2045} 3215}
2046 3216
2047void 3217void
2048ev_check_stop (EV_P_ ev_check *w) 3218ev_check_stop (EV_P_ ev_check *w)
2049{ 3219{
2050 ev_clear_pending (EV_A_ (W)w); 3220 clear_pending (EV_A_ (W)w);
2051 if (expect_false (!ev_is_active (w))) 3221 if (expect_false (!ev_is_active (w)))
2052 return; 3222 return;
2053 3223
3224 EV_FREQUENT_CHECK;
3225
2054 { 3226 {
2055 int active = ((W)w)->active; 3227 int active = ev_active (w);
3228
2056 checks [active - 1] = checks [--checkcnt]; 3229 checks [active - 1] = checks [--checkcnt];
2057 ((W)checks [active - 1])->active = active; 3230 ev_active (checks [active - 1]) = active;
2058 } 3231 }
2059 3232
2060 ev_stop (EV_A_ (W)w); 3233 ev_stop (EV_A_ (W)w);
3234
3235 EV_FREQUENT_CHECK;
2061} 3236}
2062 3237
2063#if EV_EMBED_ENABLE 3238#if EV_EMBED_ENABLE
2064void noinline 3239void noinline
2065ev_embed_sweep (EV_P_ ev_embed *w) 3240ev_embed_sweep (EV_P_ ev_embed *w)
2066{ 3241{
2067 ev_loop (w->loop, EVLOOP_NONBLOCK); 3242 ev_loop (w->other, EVLOOP_NONBLOCK);
2068} 3243}
2069 3244
2070static void 3245static void
2071embed_cb (EV_P_ ev_io *io, int revents) 3246embed_io_cb (EV_P_ ev_io *io, int revents)
2072{ 3247{
2073 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3248 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2074 3249
2075 if (ev_cb (w)) 3250 if (ev_cb (w))
2076 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3251 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2077 else 3252 else
2078 ev_embed_sweep (loop, w); 3253 ev_loop (w->other, EVLOOP_NONBLOCK);
2079} 3254}
3255
3256static void
3257embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3258{
3259 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3260
3261 {
3262 EV_P = w->other;
3263
3264 while (fdchangecnt)
3265 {
3266 fd_reify (EV_A);
3267 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3268 }
3269 }
3270}
3271
3272static void
3273embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3274{
3275 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3276
3277 ev_embed_stop (EV_A_ w);
3278
3279 {
3280 EV_P = w->other;
3281
3282 ev_loop_fork (EV_A);
3283 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3284 }
3285
3286 ev_embed_start (EV_A_ w);
3287}
3288
3289#if 0
3290static void
3291embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3292{
3293 ev_idle_stop (EV_A_ idle);
3294}
3295#endif
2080 3296
2081void 3297void
2082ev_embed_start (EV_P_ ev_embed *w) 3298ev_embed_start (EV_P_ ev_embed *w)
2083{ 3299{
2084 if (expect_false (ev_is_active (w))) 3300 if (expect_false (ev_is_active (w)))
2085 return; 3301 return;
2086 3302
2087 { 3303 {
2088 struct ev_loop *loop = w->loop; 3304 EV_P = w->other;
2089 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3305 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2090 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3306 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2091 } 3307 }
3308
3309 EV_FREQUENT_CHECK;
2092 3310
2093 ev_set_priority (&w->io, ev_priority (w)); 3311 ev_set_priority (&w->io, ev_priority (w));
2094 ev_io_start (EV_A_ &w->io); 3312 ev_io_start (EV_A_ &w->io);
2095 3313
3314 ev_prepare_init (&w->prepare, embed_prepare_cb);
3315 ev_set_priority (&w->prepare, EV_MINPRI);
3316 ev_prepare_start (EV_A_ &w->prepare);
3317
3318 ev_fork_init (&w->fork, embed_fork_cb);
3319 ev_fork_start (EV_A_ &w->fork);
3320
3321 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3322
2096 ev_start (EV_A_ (W)w, 1); 3323 ev_start (EV_A_ (W)w, 1);
3324
3325 EV_FREQUENT_CHECK;
2097} 3326}
2098 3327
2099void 3328void
2100ev_embed_stop (EV_P_ ev_embed *w) 3329ev_embed_stop (EV_P_ ev_embed *w)
2101{ 3330{
2102 ev_clear_pending (EV_A_ (W)w); 3331 clear_pending (EV_A_ (W)w);
2103 if (expect_false (!ev_is_active (w))) 3332 if (expect_false (!ev_is_active (w)))
2104 return; 3333 return;
2105 3334
3335 EV_FREQUENT_CHECK;
3336
2106 ev_io_stop (EV_A_ &w->io); 3337 ev_io_stop (EV_A_ &w->io);
3338 ev_prepare_stop (EV_A_ &w->prepare);
3339 ev_fork_stop (EV_A_ &w->fork);
2107 3340
2108 ev_stop (EV_A_ (W)w); 3341 EV_FREQUENT_CHECK;
2109} 3342}
2110#endif 3343#endif
2111 3344
2112#if EV_FORK_ENABLE 3345#if EV_FORK_ENABLE
2113void 3346void
2114ev_fork_start (EV_P_ ev_fork *w) 3347ev_fork_start (EV_P_ ev_fork *w)
2115{ 3348{
2116 if (expect_false (ev_is_active (w))) 3349 if (expect_false (ev_is_active (w)))
2117 return; 3350 return;
3351
3352 EV_FREQUENT_CHECK;
2118 3353
2119 ev_start (EV_A_ (W)w, ++forkcnt); 3354 ev_start (EV_A_ (W)w, ++forkcnt);
2120 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3355 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2121 forks [forkcnt - 1] = w; 3356 forks [forkcnt - 1] = w;
3357
3358 EV_FREQUENT_CHECK;
2122} 3359}
2123 3360
2124void 3361void
2125ev_fork_stop (EV_P_ ev_fork *w) 3362ev_fork_stop (EV_P_ ev_fork *w)
2126{ 3363{
2127 ev_clear_pending (EV_A_ (W)w); 3364 clear_pending (EV_A_ (W)w);
2128 if (expect_false (!ev_is_active (w))) 3365 if (expect_false (!ev_is_active (w)))
2129 return; 3366 return;
2130 3367
3368 EV_FREQUENT_CHECK;
3369
2131 { 3370 {
2132 int active = ((W)w)->active; 3371 int active = ev_active (w);
3372
2133 forks [active - 1] = forks [--forkcnt]; 3373 forks [active - 1] = forks [--forkcnt];
2134 ((W)forks [active - 1])->active = active; 3374 ev_active (forks [active - 1]) = active;
2135 } 3375 }
2136 3376
2137 ev_stop (EV_A_ (W)w); 3377 ev_stop (EV_A_ (W)w);
3378
3379 EV_FREQUENT_CHECK;
3380}
3381#endif
3382
3383#if EV_ASYNC_ENABLE
3384void
3385ev_async_start (EV_P_ ev_async *w)
3386{
3387 if (expect_false (ev_is_active (w)))
3388 return;
3389
3390 evpipe_init (EV_A);
3391
3392 EV_FREQUENT_CHECK;
3393
3394 ev_start (EV_A_ (W)w, ++asynccnt);
3395 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3396 asyncs [asynccnt - 1] = w;
3397
3398 EV_FREQUENT_CHECK;
3399}
3400
3401void
3402ev_async_stop (EV_P_ ev_async *w)
3403{
3404 clear_pending (EV_A_ (W)w);
3405 if (expect_false (!ev_is_active (w)))
3406 return;
3407
3408 EV_FREQUENT_CHECK;
3409
3410 {
3411 int active = ev_active (w);
3412
3413 asyncs [active - 1] = asyncs [--asynccnt];
3414 ev_active (asyncs [active - 1]) = active;
3415 }
3416
3417 ev_stop (EV_A_ (W)w);
3418
3419 EV_FREQUENT_CHECK;
3420}
3421
3422void
3423ev_async_send (EV_P_ ev_async *w)
3424{
3425 w->sent = 1;
3426 evpipe_write (EV_A_ &async_pending);
2138} 3427}
2139#endif 3428#endif
2140 3429
2141/*****************************************************************************/ 3430/*****************************************************************************/
2142 3431
… …
2152once_cb (EV_P_ struct ev_once *once, int revents) 3441once_cb (EV_P_ struct ev_once *once, int revents)
2153{ 3442{
2154 void (*cb)(int revents, void *arg) = once->cb; 3443 void (*cb)(int revents, void *arg) = once->cb;
2155 void *arg = once->arg; 3444 void *arg = once->arg;
2156 3445
2157 ev_io_stop (EV_A_ &once->io); 3446 ev_io_stop (EV_A_ &once->io);
2158 ev_timer_stop (EV_A_ &once->to); 3447 ev_timer_stop (EV_A_ &once->to);
2159 ev_free (once); 3448 ev_free (once);
2160 3449
2161 cb (revents, arg); 3450 cb (revents, arg);
2162} 3451}
2163 3452
2164static void 3453static void
2165once_cb_io (EV_P_ ev_io *w, int revents) 3454once_cb_io (EV_P_ ev_io *w, int revents)
2166{ 3455{
2167 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3456 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3457
3458 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2168} 3459}
2169 3460
2170static void 3461static void
2171once_cb_to (EV_P_ ev_timer *w, int revents) 3462once_cb_to (EV_P_ ev_timer *w, int revents)
2172{ 3463{
2173 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3464 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3465
3466 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2174} 3467}
2175 3468
2176void 3469void
2177ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3470ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2178{ 3471{
… …
2200 ev_timer_set (&once->to, timeout, 0.); 3493 ev_timer_set (&once->to, timeout, 0.);
2201 ev_timer_start (EV_A_ &once->to); 3494 ev_timer_start (EV_A_ &once->to);
2202 } 3495 }
2203} 3496}
2204 3497
3498/*****************************************************************************/
3499
3500#if EV_WALK_ENABLE
3501void
3502ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3503{
3504 int i, j;
3505 ev_watcher_list *wl, *wn;
3506
3507 if (types & (EV_IO | EV_EMBED))
3508 for (i = 0; i < anfdmax; ++i)
3509 for (wl = anfds [i].head; wl; )
3510 {
3511 wn = wl->next;
3512
3513#if EV_EMBED_ENABLE
3514 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3515 {
3516 if (types & EV_EMBED)
3517 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3518 }
3519 else
3520#endif
3521#if EV_USE_INOTIFY
3522 if (ev_cb ((ev_io *)wl) == infy_cb)
3523 ;
3524 else
3525#endif
3526 if ((ev_io *)wl != &pipe_w)
3527 if (types & EV_IO)
3528 cb (EV_A_ EV_IO, wl);
3529
3530 wl = wn;
3531 }
3532
3533 if (types & (EV_TIMER | EV_STAT))
3534 for (i = timercnt + HEAP0; i-- > HEAP0; )
3535#if EV_STAT_ENABLE
3536 /*TODO: timer is not always active*/
3537 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3538 {
3539 if (types & EV_STAT)
3540 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3541 }
3542 else
3543#endif
3544 if (types & EV_TIMER)
3545 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3546
3547#if EV_PERIODIC_ENABLE
3548 if (types & EV_PERIODIC)
3549 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3550 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3551#endif
3552
3553#if EV_IDLE_ENABLE
3554 if (types & EV_IDLE)
3555 for (j = NUMPRI; i--; )
3556 for (i = idlecnt [j]; i--; )
3557 cb (EV_A_ EV_IDLE, idles [j][i]);
3558#endif
3559
3560#if EV_FORK_ENABLE
3561 if (types & EV_FORK)
3562 for (i = forkcnt; i--; )
3563 if (ev_cb (forks [i]) != embed_fork_cb)
3564 cb (EV_A_ EV_FORK, forks [i]);
3565#endif
3566
3567#if EV_ASYNC_ENABLE
3568 if (types & EV_ASYNC)
3569 for (i = asynccnt; i--; )
3570 cb (EV_A_ EV_ASYNC, asyncs [i]);
3571#endif
3572
3573 if (types & EV_PREPARE)
3574 for (i = preparecnt; i--; )
3575#if EV_EMBED_ENABLE
3576 if (ev_cb (prepares [i]) != embed_prepare_cb)
3577#endif
3578 cb (EV_A_ EV_PREPARE, prepares [i]);
3579
3580 if (types & EV_CHECK)
3581 for (i = checkcnt; i--; )
3582 cb (EV_A_ EV_CHECK, checks [i]);
3583
3584 if (types & EV_SIGNAL)
3585 for (i = 0; i < EV_NSIG - 1; ++i)
3586 for (wl = signals [i].head; wl; )
3587 {
3588 wn = wl->next;
3589 cb (EV_A_ EV_SIGNAL, wl);
3590 wl = wn;
3591 }
3592
3593 if (types & EV_CHILD)
3594 for (i = EV_PID_HASHSIZE; i--; )
3595 for (wl = childs [i]; wl; )
3596 {
3597 wn = wl->next;
3598 cb (EV_A_ EV_CHILD, wl);
3599 wl = wn;
3600 }
3601/* EV_STAT 0x00001000 /* stat data changed */
3602/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3603}
3604#endif
3605
3606#if EV_MULTIPLICITY
3607 #include "ev_wrap.h"
3608#endif
3609
2205#ifdef __cplusplus 3610#ifdef __cplusplus
2206} 3611}
2207#endif 3612#endif
2208 3613

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