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Comparing libev/ev.c (file contents):
Revision 1.250 by root, Thu May 22 02:44:57 2008 UTC vs.
Revision 1.336 by root, Wed Mar 10 08:19:38 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
47# include EV_CONFIG_H 47# include EV_CONFIG_H
48# else 48# else
49# include "config.h" 49# include "config.h"
50# endif 50# endif
51 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
52# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
55# endif 69# endif
56# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
58# endif 72# endif
59# else 73# else
60# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
62# endif 76# endif
… …
96# define EV_USE_EPOLL 0 110# define EV_USE_EPOLL 0
97# endif 111# endif
98# endif 112# endif
99 113
100# ifndef EV_USE_KQUEUE 114# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
102# define EV_USE_KQUEUE 1 116# define EV_USE_KQUEUE 1
103# else 117# else
104# define EV_USE_KQUEUE 0 118# define EV_USE_KQUEUE 0
105# endif 119# endif
106# endif 120# endif
… …
119# else 133# else
120# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
121# endif 135# endif
122# endif 136# endif
123 137
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
124# ifndef EV_USE_EVENTFD 146# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD 147# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1 148# define EV_USE_EVENTFD 1
127# else 149# else
128# define EV_USE_EVENTFD 0 150# define EV_USE_EVENTFD 0
… …
131 153
132#endif 154#endif
133 155
134#include <math.h> 156#include <math.h>
135#include <stdlib.h> 157#include <stdlib.h>
158#include <string.h>
136#include <fcntl.h> 159#include <fcntl.h>
137#include <stddef.h> 160#include <stddef.h>
138 161
139#include <stdio.h> 162#include <stdio.h>
140 163
141#include <assert.h> 164#include <assert.h>
142#include <errno.h> 165#include <errno.h>
143#include <sys/types.h> 166#include <sys/types.h>
144#include <time.h> 167#include <time.h>
168#include <limits.h>
145 169
146#include <signal.h> 170#include <signal.h>
147 171
148#ifdef EV_H 172#ifdef EV_H
149# include EV_H 173# include EV_H
… …
154#ifndef _WIN32 178#ifndef _WIN32
155# include <sys/time.h> 179# include <sys/time.h>
156# include <sys/wait.h> 180# include <sys/wait.h>
157# include <unistd.h> 181# include <unistd.h>
158#else 182#else
183# include <io.h>
159# define WIN32_LEAN_AND_MEAN 184# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 185# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 186# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 187# define EV_SELECT_IS_WINSOCKET 1
163# endif 188# endif
189# undef EV_AVOID_STDIO
164#endif 190#endif
165 191
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 192/* this block tries to deduce configuration from header-defined symbols and defaults */
167 193
194/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG)
196/* use what's provided */
197#elif defined (NSIG)
198# define EV_NSIG (NSIG)
199#elif defined(_NSIG)
200# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX)
202# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX)
204# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX)
206# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE)
212# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else
216# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */
219# define EV_NSIG 65
220#endif
221
222#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL 1
225# else
226# define EV_USE_CLOCK_SYSCALL 0
227# endif
228#endif
229
168#ifndef EV_USE_MONOTONIC 230#ifndef EV_USE_MONOTONIC
231# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
232# define EV_USE_MONOTONIC 1
233# else
169# define EV_USE_MONOTONIC 0 234# define EV_USE_MONOTONIC 0
235# endif
170#endif 236#endif
171 237
172#ifndef EV_USE_REALTIME 238#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 239# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 240#endif
175 241
176#ifndef EV_USE_NANOSLEEP 242#ifndef EV_USE_NANOSLEEP
243# if _POSIX_C_SOURCE >= 199309L
244# define EV_USE_NANOSLEEP 1
245# else
177# define EV_USE_NANOSLEEP 0 246# define EV_USE_NANOSLEEP 0
247# endif
178#endif 248#endif
179 249
180#ifndef EV_USE_SELECT 250#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 251# define EV_USE_SELECT 1
182#endif 252#endif
… …
235# else 305# else
236# define EV_USE_EVENTFD 0 306# define EV_USE_EVENTFD 0
237# endif 307# endif
238#endif 308#endif
239 309
310#ifndef EV_USE_SIGNALFD
311# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
312# define EV_USE_SIGNALFD 1
313# else
314# define EV_USE_SIGNALFD 0
315# endif
316#endif
317
240#if 0 /* debugging */ 318#if 0 /* debugging */
241# define EV_VERIFY 3 319# define EV_VERIFY 3
242# define EV_USE_4HEAP 1 320# define EV_USE_4HEAP 1
243# define EV_HEAP_CACHE_AT 1 321# define EV_HEAP_CACHE_AT 1
244#endif 322#endif
… …
253 331
254#ifndef EV_HEAP_CACHE_AT 332#ifndef EV_HEAP_CACHE_AT
255# define EV_HEAP_CACHE_AT !EV_MINIMAL 333# define EV_HEAP_CACHE_AT !EV_MINIMAL
256#endif 334#endif
257 335
336/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
337/* which makes programs even slower. might work on other unices, too. */
338#if EV_USE_CLOCK_SYSCALL
339# include <syscall.h>
340# ifdef SYS_clock_gettime
341# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
342# undef EV_USE_MONOTONIC
343# define EV_USE_MONOTONIC 1
344# else
345# undef EV_USE_CLOCK_SYSCALL
346# define EV_USE_CLOCK_SYSCALL 0
347# endif
348#endif
349
258/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 350/* this block fixes any misconfiguration where we know we run into trouble otherwise */
351
352#ifdef _AIX
353/* AIX has a completely broken poll.h header */
354# undef EV_USE_POLL
355# define EV_USE_POLL 0
356#endif
259 357
260#ifndef CLOCK_MONOTONIC 358#ifndef CLOCK_MONOTONIC
261# undef EV_USE_MONOTONIC 359# undef EV_USE_MONOTONIC
262# define EV_USE_MONOTONIC 0 360# define EV_USE_MONOTONIC 0
263#endif 361#endif
… …
277# include <sys/select.h> 375# include <sys/select.h>
278# endif 376# endif
279#endif 377#endif
280 378
281#if EV_USE_INOTIFY 379#if EV_USE_INOTIFY
380# include <sys/utsname.h>
381# include <sys/statfs.h>
282# include <sys/inotify.h> 382# include <sys/inotify.h>
383/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
384# ifndef IN_DONT_FOLLOW
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387# endif
283#endif 388#endif
284 389
285#if EV_SELECT_IS_WINSOCKET 390#if EV_SELECT_IS_WINSOCKET
286# include <winsock.h> 391# include <winsock.h>
287#endif 392#endif
288 393
289#if EV_USE_EVENTFD 394#if EV_USE_EVENTFD
290/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 395/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
291# include <stdint.h> 396# include <stdint.h>
397# ifndef EFD_NONBLOCK
398# define EFD_NONBLOCK O_NONBLOCK
399# endif
400# ifndef EFD_CLOEXEC
401# ifdef O_CLOEXEC
402# define EFD_CLOEXEC O_CLOEXEC
403# else
404# define EFD_CLOEXEC 02000000
405# endif
406# endif
292# ifdef __cplusplus 407# ifdef __cplusplus
293extern "C" { 408extern "C" {
294# endif 409# endif
295int eventfd (unsigned int initval, int flags); 410int (eventfd) (unsigned int initval, int flags);
296# ifdef __cplusplus 411# ifdef __cplusplus
297} 412}
298# endif 413# endif
299#endif 414#endif
415
416#if EV_USE_SIGNALFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef SFD_NONBLOCK
420# define SFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef SFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define SFD_CLOEXEC O_CLOEXEC
425# else
426# define SFD_CLOEXEC 02000000
427# endif
428# endif
429# ifdef __cplusplus
430extern "C" {
431# endif
432int signalfd (int fd, const sigset_t *mask, int flags);
433
434struct signalfd_siginfo
435{
436 uint32_t ssi_signo;
437 char pad[128 - sizeof (uint32_t)];
438};
439# ifdef __cplusplus
440}
441# endif
442#endif
443
300 444
301/**/ 445/**/
302 446
303#if EV_VERIFY >= 3 447#if EV_VERIFY >= 3
304# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 448# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
… …
316 */ 460 */
317#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 461#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
318 462
319#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
320#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
321/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
322 465
323#if __GNUC__ >= 4 466#if __GNUC__ >= 4
324# define expect(expr,value) __builtin_expect ((expr),(value)) 467# define expect(expr,value) __builtin_expect ((expr),(value))
325# define noinline __attribute__ ((noinline)) 468# define noinline __attribute__ ((noinline))
326#else 469#else
… …
339# define inline_speed static noinline 482# define inline_speed static noinline
340#else 483#else
341# define inline_speed static inline 484# define inline_speed static inline
342#endif 485#endif
343 486
344#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 487#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
488
489#if EV_MINPRI == EV_MAXPRI
490# define ABSPRI(w) (((W)w), 0)
491#else
345#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 492# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
493#endif
346 494
347#define EMPTY /* required for microsofts broken pseudo-c compiler */ 495#define EMPTY /* required for microsofts broken pseudo-c compiler */
348#define EMPTY2(a,b) /* used to suppress some warnings */ 496#define EMPTY2(a,b) /* used to suppress some warnings */
349 497
350typedef ev_watcher *W; 498typedef ev_watcher *W;
… …
352typedef ev_watcher_time *WT; 500typedef ev_watcher_time *WT;
353 501
354#define ev_active(w) ((W)(w))->active 502#define ev_active(w) ((W)(w))->active
355#define ev_at(w) ((WT)(w))->at 503#define ev_at(w) ((WT)(w))->at
356 504
357#if EV_USE_MONOTONIC 505#if EV_USE_REALTIME
358/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 506/* sig_atomic_t is used to avoid per-thread variables or locking but still */
359/* giving it a reasonably high chance of working on typical architetcures */ 507/* giving it a reasonably high chance of working on typical architetcures */
508static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
509#endif
510
511#if EV_USE_MONOTONIC
360static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 512static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
513#endif
514
515#ifndef EV_FD_TO_WIN32_HANDLE
516# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
517#endif
518#ifndef EV_WIN32_HANDLE_TO_FD
519# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
520#endif
521#ifndef EV_WIN32_CLOSE_FD
522# define EV_WIN32_CLOSE_FD(fd) close (fd)
361#endif 523#endif
362 524
363#ifdef _WIN32 525#ifdef _WIN32
364# include "ev_win32.c" 526# include "ev_win32.c"
365#endif 527#endif
366 528
367/*****************************************************************************/ 529/*****************************************************************************/
368 530
531#if EV_AVOID_STDIO
532static void noinline
533ev_printerr (const char *msg)
534{
535 write (STDERR_FILENO, msg, strlen (msg));
536}
537#endif
538
369static void (*syserr_cb)(const char *msg); 539static void (*syserr_cb)(const char *msg);
370 540
371void 541void
372ev_set_syserr_cb (void (*cb)(const char *msg)) 542ev_set_syserr_cb (void (*cb)(const char *msg))
373{ 543{
374 syserr_cb = cb; 544 syserr_cb = cb;
375} 545}
376 546
377static void noinline 547static void noinline
378syserr (const char *msg) 548ev_syserr (const char *msg)
379{ 549{
380 if (!msg) 550 if (!msg)
381 msg = "(libev) system error"; 551 msg = "(libev) system error";
382 552
383 if (syserr_cb) 553 if (syserr_cb)
384 syserr_cb (msg); 554 syserr_cb (msg);
385 else 555 else
386 { 556 {
557#if EV_AVOID_STDIO
558 const char *err = strerror (errno);
559
560 ev_printerr (msg);
561 ev_printerr (": ");
562 ev_printerr (err);
563 ev_printerr ("\n");
564#else
387 perror (msg); 565 perror (msg);
566#endif
388 abort (); 567 abort ();
389 } 568 }
390} 569}
391 570
392static void * 571static void *
393ev_realloc_emul (void *ptr, long size) 572ev_realloc_emul (void *ptr, long size)
394{ 573{
574#if __GLIBC__
575 return realloc (ptr, size);
576#else
395 /* some systems, notably openbsd and darwin, fail to properly 577 /* some systems, notably openbsd and darwin, fail to properly
396 * implement realloc (x, 0) (as required by both ansi c-98 and 578 * implement realloc (x, 0) (as required by both ansi c-89 and
397 * the single unix specification, so work around them here. 579 * the single unix specification, so work around them here.
398 */ 580 */
399 581
400 if (size) 582 if (size)
401 return realloc (ptr, size); 583 return realloc (ptr, size);
402 584
403 free (ptr); 585 free (ptr);
404 return 0; 586 return 0;
587#endif
405} 588}
406 589
407static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 590static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
408 591
409void 592void
… …
417{ 600{
418 ptr = alloc (ptr, size); 601 ptr = alloc (ptr, size);
419 602
420 if (!ptr && size) 603 if (!ptr && size)
421 { 604 {
605#if EV_AVOID_STDIO
606 ev_printerr ("libev: memory allocation failed, aborting.\n");
607#else
422 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 608 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
609#endif
423 abort (); 610 abort ();
424 } 611 }
425 612
426 return ptr; 613 return ptr;
427} 614}
… …
429#define ev_malloc(size) ev_realloc (0, (size)) 616#define ev_malloc(size) ev_realloc (0, (size))
430#define ev_free(ptr) ev_realloc ((ptr), 0) 617#define ev_free(ptr) ev_realloc ((ptr), 0)
431 618
432/*****************************************************************************/ 619/*****************************************************************************/
433 620
621/* set in reify when reification needed */
622#define EV_ANFD_REIFY 1
623
624/* file descriptor info structure */
434typedef struct 625typedef struct
435{ 626{
436 WL head; 627 WL head;
437 unsigned char events; 628 unsigned char events; /* the events watched for */
629 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
630 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
438 unsigned char reify; 631 unsigned char unused;
632#if EV_USE_EPOLL
633 unsigned int egen; /* generation counter to counter epoll bugs */
634#endif
439#if EV_SELECT_IS_WINSOCKET 635#if EV_SELECT_IS_WINSOCKET
440 SOCKET handle; 636 SOCKET handle;
441#endif 637#endif
442} ANFD; 638} ANFD;
443 639
640/* stores the pending event set for a given watcher */
444typedef struct 641typedef struct
445{ 642{
446 W w; 643 W w;
447 int events; 644 int events; /* the pending event set for the given watcher */
448} ANPENDING; 645} ANPENDING;
449 646
450#if EV_USE_INOTIFY 647#if EV_USE_INOTIFY
451/* hash table entry per inotify-id */ 648/* hash table entry per inotify-id */
452typedef struct 649typedef struct
… …
455} ANFS; 652} ANFS;
456#endif 653#endif
457 654
458/* Heap Entry */ 655/* Heap Entry */
459#if EV_HEAP_CACHE_AT 656#if EV_HEAP_CACHE_AT
657 /* a heap element */
460 typedef struct { 658 typedef struct {
461 ev_tstamp at; 659 ev_tstamp at;
462 WT w; 660 WT w;
463 } ANHE; 661 } ANHE;
464 662
465 #define ANHE_w(he) (he).w /* access watcher, read-write */ 663 #define ANHE_w(he) (he).w /* access watcher, read-write */
466 #define ANHE_at(he) (he).at /* access cached at, read-only */ 664 #define ANHE_at(he) (he).at /* access cached at, read-only */
467 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 665 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
468#else 666#else
667 /* a heap element */
469 typedef WT ANHE; 668 typedef WT ANHE;
470 669
471 #define ANHE_w(he) (he) 670 #define ANHE_w(he) (he)
472 #define ANHE_at(he) (he)->at 671 #define ANHE_at(he) (he)->at
473 #define ANHE_at_cache(he) 672 #define ANHE_at_cache(he)
… …
497 696
498 static int ev_default_loop_ptr; 697 static int ev_default_loop_ptr;
499 698
500#endif 699#endif
501 700
701#if EV_MINIMAL < 2
702# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
703# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
704# define EV_INVOKE_PENDING invoke_cb (EV_A)
705#else
706# define EV_RELEASE_CB (void)0
707# define EV_ACQUIRE_CB (void)0
708# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
709#endif
710
711#define EVUNLOOP_RECURSE 0x80
712
502/*****************************************************************************/ 713/*****************************************************************************/
503 714
715#ifndef EV_HAVE_EV_TIME
504ev_tstamp 716ev_tstamp
505ev_time (void) 717ev_time (void)
506{ 718{
507#if EV_USE_REALTIME 719#if EV_USE_REALTIME
720 if (expect_true (have_realtime))
721 {
508 struct timespec ts; 722 struct timespec ts;
509 clock_gettime (CLOCK_REALTIME, &ts); 723 clock_gettime (CLOCK_REALTIME, &ts);
510 return ts.tv_sec + ts.tv_nsec * 1e-9; 724 return ts.tv_sec + ts.tv_nsec * 1e-9;
511#else 725 }
726#endif
727
512 struct timeval tv; 728 struct timeval tv;
513 gettimeofday (&tv, 0); 729 gettimeofday (&tv, 0);
514 return tv.tv_sec + tv.tv_usec * 1e-6; 730 return tv.tv_sec + tv.tv_usec * 1e-6;
515#endif
516} 731}
732#endif
517 733
518ev_tstamp inline_size 734inline_size ev_tstamp
519get_clock (void) 735get_clock (void)
520{ 736{
521#if EV_USE_MONOTONIC 737#if EV_USE_MONOTONIC
522 if (expect_true (have_monotonic)) 738 if (expect_true (have_monotonic))
523 { 739 {
… …
556 struct timeval tv; 772 struct timeval tv;
557 773
558 tv.tv_sec = (time_t)delay; 774 tv.tv_sec = (time_t)delay;
559 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 775 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
560 776
777 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
778 /* something not guaranteed by newer posix versions, but guaranteed */
779 /* by older ones */
561 select (0, 0, 0, 0, &tv); 780 select (0, 0, 0, 0, &tv);
562#endif 781#endif
563 } 782 }
564} 783}
565 784
566/*****************************************************************************/ 785/*****************************************************************************/
567 786
568#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 787#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
569 788
570int inline_size 789/* find a suitable new size for the given array, */
790/* hopefully by rounding to a ncie-to-malloc size */
791inline_size int
571array_nextsize (int elem, int cur, int cnt) 792array_nextsize (int elem, int cur, int cnt)
572{ 793{
573 int ncur = cur + 1; 794 int ncur = cur + 1;
574 795
575 do 796 do
… …
592array_realloc (int elem, void *base, int *cur, int cnt) 813array_realloc (int elem, void *base, int *cur, int cnt)
593{ 814{
594 *cur = array_nextsize (elem, *cur, cnt); 815 *cur = array_nextsize (elem, *cur, cnt);
595 return ev_realloc (base, elem * *cur); 816 return ev_realloc (base, elem * *cur);
596} 817}
818
819#define array_init_zero(base,count) \
820 memset ((void *)(base), 0, sizeof (*(base)) * (count))
597 821
598#define array_needsize(type,base,cur,cnt,init) \ 822#define array_needsize(type,base,cur,cnt,init) \
599 if (expect_false ((cnt) > (cur))) \ 823 if (expect_false ((cnt) > (cur))) \
600 { \ 824 { \
601 int ocur_ = (cur); \ 825 int ocur_ = (cur); \
… …
613 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 837 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
614 } 838 }
615#endif 839#endif
616 840
617#define array_free(stem, idx) \ 841#define array_free(stem, idx) \
618 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 842 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
619 843
620/*****************************************************************************/ 844/*****************************************************************************/
845
846/* dummy callback for pending events */
847static void noinline
848pendingcb (EV_P_ ev_prepare *w, int revents)
849{
850}
621 851
622void noinline 852void noinline
623ev_feed_event (EV_P_ void *w, int revents) 853ev_feed_event (EV_P_ void *w, int revents)
624{ 854{
625 W w_ = (W)w; 855 W w_ = (W)w;
… …
634 pendings [pri][w_->pending - 1].w = w_; 864 pendings [pri][w_->pending - 1].w = w_;
635 pendings [pri][w_->pending - 1].events = revents; 865 pendings [pri][w_->pending - 1].events = revents;
636 } 866 }
637} 867}
638 868
639void inline_speed 869inline_speed void
870feed_reverse (EV_P_ W w)
871{
872 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
873 rfeeds [rfeedcnt++] = w;
874}
875
876inline_size void
877feed_reverse_done (EV_P_ int revents)
878{
879 do
880 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
881 while (rfeedcnt);
882}
883
884inline_speed void
640queue_events (EV_P_ W *events, int eventcnt, int type) 885queue_events (EV_P_ W *events, int eventcnt, int type)
641{ 886{
642 int i; 887 int i;
643 888
644 for (i = 0; i < eventcnt; ++i) 889 for (i = 0; i < eventcnt; ++i)
645 ev_feed_event (EV_A_ events [i], type); 890 ev_feed_event (EV_A_ events [i], type);
646} 891}
647 892
648/*****************************************************************************/ 893/*****************************************************************************/
649 894
650void inline_size 895inline_speed void
651anfds_init (ANFD *base, int count)
652{
653 while (count--)
654 {
655 base->head = 0;
656 base->events = EV_NONE;
657 base->reify = 0;
658
659 ++base;
660 }
661}
662
663void inline_speed
664fd_event (EV_P_ int fd, int revents) 896fd_event_nc (EV_P_ int fd, int revents)
665{ 897{
666 ANFD *anfd = anfds + fd; 898 ANFD *anfd = anfds + fd;
667 ev_io *w; 899 ev_io *w;
668 900
669 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 901 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
673 if (ev) 905 if (ev)
674 ev_feed_event (EV_A_ (W)w, ev); 906 ev_feed_event (EV_A_ (W)w, ev);
675 } 907 }
676} 908}
677 909
910/* do not submit kernel events for fds that have reify set */
911/* because that means they changed while we were polling for new events */
912inline_speed void
913fd_event (EV_P_ int fd, int revents)
914{
915 ANFD *anfd = anfds + fd;
916
917 if (expect_true (!anfd->reify))
918 fd_event_nc (EV_A_ fd, revents);
919}
920
678void 921void
679ev_feed_fd_event (EV_P_ int fd, int revents) 922ev_feed_fd_event (EV_P_ int fd, int revents)
680{ 923{
681 if (fd >= 0 && fd < anfdmax) 924 if (fd >= 0 && fd < anfdmax)
682 fd_event (EV_A_ fd, revents); 925 fd_event_nc (EV_A_ fd, revents);
683} 926}
684 927
685void inline_size 928/* make sure the external fd watch events are in-sync */
929/* with the kernel/libev internal state */
930inline_size void
686fd_reify (EV_P) 931fd_reify (EV_P)
687{ 932{
688 int i; 933 int i;
689 934
690 for (i = 0; i < fdchangecnt; ++i) 935 for (i = 0; i < fdchangecnt; ++i)
… …
699 events |= (unsigned char)w->events; 944 events |= (unsigned char)w->events;
700 945
701#if EV_SELECT_IS_WINSOCKET 946#if EV_SELECT_IS_WINSOCKET
702 if (events) 947 if (events)
703 { 948 {
704 unsigned long argp; 949 unsigned long arg;
705 #ifdef EV_FD_TO_WIN32_HANDLE
706 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 950 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
707 #else
708 anfd->handle = _get_osfhandle (fd);
709 #endif
710 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 951 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
711 } 952 }
712#endif 953#endif
713 954
714 { 955 {
715 unsigned char o_events = anfd->events; 956 unsigned char o_events = anfd->events;
716 unsigned char o_reify = anfd->reify; 957 unsigned char o_reify = anfd->reify;
717 958
718 anfd->reify = 0; 959 anfd->reify = 0;
719 anfd->events = events; 960 anfd->events = events;
720 961
721 if (o_events != events || o_reify & EV_IOFDSET) 962 if (o_events != events || o_reify & EV__IOFDSET)
722 backend_modify (EV_A_ fd, o_events, events); 963 backend_modify (EV_A_ fd, o_events, events);
723 } 964 }
724 } 965 }
725 966
726 fdchangecnt = 0; 967 fdchangecnt = 0;
727} 968}
728 969
729void inline_size 970/* something about the given fd changed */
971inline_size void
730fd_change (EV_P_ int fd, int flags) 972fd_change (EV_P_ int fd, int flags)
731{ 973{
732 unsigned char reify = anfds [fd].reify; 974 unsigned char reify = anfds [fd].reify;
733 anfds [fd].reify |= flags; 975 anfds [fd].reify |= flags;
734 976
… …
738 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 980 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
739 fdchanges [fdchangecnt - 1] = fd; 981 fdchanges [fdchangecnt - 1] = fd;
740 } 982 }
741} 983}
742 984
743void inline_speed 985/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
986inline_speed void
744fd_kill (EV_P_ int fd) 987fd_kill (EV_P_ int fd)
745{ 988{
746 ev_io *w; 989 ev_io *w;
747 990
748 while ((w = (ev_io *)anfds [fd].head)) 991 while ((w = (ev_io *)anfds [fd].head))
… …
750 ev_io_stop (EV_A_ w); 993 ev_io_stop (EV_A_ w);
751 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 994 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
752 } 995 }
753} 996}
754 997
755int inline_size 998/* check whether the given fd is actually valid, for error recovery */
999inline_size int
756fd_valid (int fd) 1000fd_valid (int fd)
757{ 1001{
758#ifdef _WIN32 1002#ifdef _WIN32
759 return _get_osfhandle (fd) != -1; 1003 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
760#else 1004#else
761 return fcntl (fd, F_GETFD) != -1; 1005 return fcntl (fd, F_GETFD) != -1;
762#endif 1006#endif
763} 1007}
764 1008
… …
768{ 1012{
769 int fd; 1013 int fd;
770 1014
771 for (fd = 0; fd < anfdmax; ++fd) 1015 for (fd = 0; fd < anfdmax; ++fd)
772 if (anfds [fd].events) 1016 if (anfds [fd].events)
773 if (!fd_valid (fd) == -1 && errno == EBADF) 1017 if (!fd_valid (fd) && errno == EBADF)
774 fd_kill (EV_A_ fd); 1018 fd_kill (EV_A_ fd);
775} 1019}
776 1020
777/* called on ENOMEM in select/poll to kill some fds and retry */ 1021/* called on ENOMEM in select/poll to kill some fds and retry */
778static void noinline 1022static void noinline
… …
782 1026
783 for (fd = anfdmax; fd--; ) 1027 for (fd = anfdmax; fd--; )
784 if (anfds [fd].events) 1028 if (anfds [fd].events)
785 { 1029 {
786 fd_kill (EV_A_ fd); 1030 fd_kill (EV_A_ fd);
787 return; 1031 break;
788 } 1032 }
789} 1033}
790 1034
791/* usually called after fork if backend needs to re-arm all fds from scratch */ 1035/* usually called after fork if backend needs to re-arm all fds from scratch */
792static void noinline 1036static void noinline
… …
796 1040
797 for (fd = 0; fd < anfdmax; ++fd) 1041 for (fd = 0; fd < anfdmax; ++fd)
798 if (anfds [fd].events) 1042 if (anfds [fd].events)
799 { 1043 {
800 anfds [fd].events = 0; 1044 anfds [fd].events = 0;
1045 anfds [fd].emask = 0;
801 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1046 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
802 } 1047 }
1048}
1049
1050/* used to prepare libev internal fd's */
1051/* this is not fork-safe */
1052inline_speed void
1053fd_intern (int fd)
1054{
1055#ifdef _WIN32
1056 unsigned long arg = 1;
1057 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1058#else
1059 fcntl (fd, F_SETFD, FD_CLOEXEC);
1060 fcntl (fd, F_SETFL, O_NONBLOCK);
1061#endif
803} 1062}
804 1063
805/*****************************************************************************/ 1064/*****************************************************************************/
806 1065
807/* 1066/*
… …
822#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 1081#define HEAP0 (DHEAP - 1) /* index of first element in heap */
823#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 1082#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
824#define UPHEAP_DONE(p,k) ((p) == (k)) 1083#define UPHEAP_DONE(p,k) ((p) == (k))
825 1084
826/* away from the root */ 1085/* away from the root */
827void inline_speed 1086inline_speed void
828downheap (ANHE *heap, int N, int k) 1087downheap (ANHE *heap, int N, int k)
829{ 1088{
830 ANHE he = heap [k]; 1089 ANHE he = heap [k];
831 ANHE *E = heap + N + HEAP0; 1090 ANHE *E = heap + N + HEAP0;
832 1091
… …
872#define HEAP0 1 1131#define HEAP0 1
873#define HPARENT(k) ((k) >> 1) 1132#define HPARENT(k) ((k) >> 1)
874#define UPHEAP_DONE(p,k) (!(p)) 1133#define UPHEAP_DONE(p,k) (!(p))
875 1134
876/* away from the root */ 1135/* away from the root */
877void inline_speed 1136inline_speed void
878downheap (ANHE *heap, int N, int k) 1137downheap (ANHE *heap, int N, int k)
879{ 1138{
880 ANHE he = heap [k]; 1139 ANHE he = heap [k];
881 1140
882 for (;;) 1141 for (;;)
883 { 1142 {
884 int c = k << 1; 1143 int c = k << 1;
885 1144
886 if (c > N + HEAP0 - 1) 1145 if (c >= N + HEAP0)
887 break; 1146 break;
888 1147
889 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 1148 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
890 ? 1 : 0; 1149 ? 1 : 0;
891 1150
… …
902 ev_active (ANHE_w (he)) = k; 1161 ev_active (ANHE_w (he)) = k;
903} 1162}
904#endif 1163#endif
905 1164
906/* towards the root */ 1165/* towards the root */
907void inline_speed 1166inline_speed void
908upheap (ANHE *heap, int k) 1167upheap (ANHE *heap, int k)
909{ 1168{
910 ANHE he = heap [k]; 1169 ANHE he = heap [k];
911 1170
912 for (;;) 1171 for (;;)
… …
923 1182
924 heap [k] = he; 1183 heap [k] = he;
925 ev_active (ANHE_w (he)) = k; 1184 ev_active (ANHE_w (he)) = k;
926} 1185}
927 1186
928void inline_size 1187/* move an element suitably so it is in a correct place */
1188inline_size void
929adjustheap (ANHE *heap, int N, int k) 1189adjustheap (ANHE *heap, int N, int k)
930{ 1190{
931 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 1191 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
932 upheap (heap, k); 1192 upheap (heap, k);
933 else 1193 else
934 downheap (heap, N, k); 1194 downheap (heap, N, k);
935} 1195}
936 1196
937/* rebuild the heap: this function is used only once and executed rarely */ 1197/* rebuild the heap: this function is used only once and executed rarely */
938void inline_size 1198inline_size void
939reheap (ANHE *heap, int N) 1199reheap (ANHE *heap, int N)
940{ 1200{
941 int i; 1201 int i;
1202
942 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 1203 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
943 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ 1204 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
944 for (i = 0; i < N; ++i) 1205 for (i = 0; i < N; ++i)
945 upheap (heap, i + HEAP0); 1206 upheap (heap, i + HEAP0);
946} 1207}
947 1208
948#if EV_VERIFY
949static void
950checkheap (ANHE *heap, int N)
951{
952 int i;
953
954 for (i = HEAP0; i < N + HEAP0; ++i)
955 {
956 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
957 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
958 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
959 }
960}
961#endif
962
963/*****************************************************************************/ 1209/*****************************************************************************/
964 1210
1211/* associate signal watchers to a signal signal */
965typedef struct 1212typedef struct
966{ 1213{
1214 EV_ATOMIC_T pending;
1215#if EV_MULTIPLICITY
1216 EV_P;
1217#endif
967 WL head; 1218 WL head;
968 EV_ATOMIC_T gotsig;
969} ANSIG; 1219} ANSIG;
970 1220
971static ANSIG *signals; 1221static ANSIG signals [EV_NSIG - 1];
972static int signalmax;
973
974static EV_ATOMIC_T gotsig;
975
976void inline_size
977signals_init (ANSIG *base, int count)
978{
979 while (count--)
980 {
981 base->head = 0;
982 base->gotsig = 0;
983
984 ++base;
985 }
986}
987 1222
988/*****************************************************************************/ 1223/*****************************************************************************/
989 1224
990void inline_speed 1225#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
991fd_intern (int fd)
992{
993#ifdef _WIN32
994 int arg = 1;
995 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
996#else
997 fcntl (fd, F_SETFD, FD_CLOEXEC);
998 fcntl (fd, F_SETFL, O_NONBLOCK);
999#endif
1000}
1001 1226
1002static void noinline 1227static void noinline
1003evpipe_init (EV_P) 1228evpipe_init (EV_P)
1004{ 1229{
1005 if (!ev_is_active (&pipeev)) 1230 if (!ev_is_active (&pipe_w))
1006 { 1231 {
1007#if EV_USE_EVENTFD 1232# if EV_USE_EVENTFD
1233 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1234 if (evfd < 0 && errno == EINVAL)
1008 if ((evfd = eventfd (0, 0)) >= 0) 1235 evfd = eventfd (0, 0);
1236
1237 if (evfd >= 0)
1009 { 1238 {
1010 evpipe [0] = -1; 1239 evpipe [0] = -1;
1011 fd_intern (evfd); 1240 fd_intern (evfd); /* doing it twice doesn't hurt */
1012 ev_io_set (&pipeev, evfd, EV_READ); 1241 ev_io_set (&pipe_w, evfd, EV_READ);
1013 } 1242 }
1014 else 1243 else
1015#endif 1244# endif
1016 { 1245 {
1017 while (pipe (evpipe)) 1246 while (pipe (evpipe))
1018 syserr ("(libev) error creating signal/async pipe"); 1247 ev_syserr ("(libev) error creating signal/async pipe");
1019 1248
1020 fd_intern (evpipe [0]); 1249 fd_intern (evpipe [0]);
1021 fd_intern (evpipe [1]); 1250 fd_intern (evpipe [1]);
1022 ev_io_set (&pipeev, evpipe [0], EV_READ); 1251 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1023 } 1252 }
1024 1253
1025 ev_io_start (EV_A_ &pipeev); 1254 ev_io_start (EV_A_ &pipe_w);
1026 ev_unref (EV_A); /* watcher should not keep loop alive */ 1255 ev_unref (EV_A); /* watcher should not keep loop alive */
1027 } 1256 }
1028} 1257}
1029 1258
1030void inline_size 1259inline_size void
1031evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1260evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1032{ 1261{
1033 if (!*flag) 1262 if (!*flag)
1034 { 1263 {
1035 int old_errno = errno; /* save errno because write might clobber it */ 1264 int old_errno = errno; /* save errno because write might clobber it */
1265 char dummy;
1036 1266
1037 *flag = 1; 1267 *flag = 1;
1038 1268
1039#if EV_USE_EVENTFD 1269#if EV_USE_EVENTFD
1040 if (evfd >= 0) 1270 if (evfd >= 0)
… …
1042 uint64_t counter = 1; 1272 uint64_t counter = 1;
1043 write (evfd, &counter, sizeof (uint64_t)); 1273 write (evfd, &counter, sizeof (uint64_t));
1044 } 1274 }
1045 else 1275 else
1046#endif 1276#endif
1047 write (evpipe [1], &old_errno, 1); 1277 write (evpipe [1], &dummy, 1);
1048 1278
1049 errno = old_errno; 1279 errno = old_errno;
1050 } 1280 }
1051} 1281}
1052 1282
1283/* called whenever the libev signal pipe */
1284/* got some events (signal, async) */
1053static void 1285static void
1054pipecb (EV_P_ ev_io *iow, int revents) 1286pipecb (EV_P_ ev_io *iow, int revents)
1055{ 1287{
1288 int i;
1289
1056#if EV_USE_EVENTFD 1290#if EV_USE_EVENTFD
1057 if (evfd >= 0) 1291 if (evfd >= 0)
1058 { 1292 {
1059 uint64_t counter; 1293 uint64_t counter;
1060 read (evfd, &counter, sizeof (uint64_t)); 1294 read (evfd, &counter, sizeof (uint64_t));
… …
1064 { 1298 {
1065 char dummy; 1299 char dummy;
1066 read (evpipe [0], &dummy, 1); 1300 read (evpipe [0], &dummy, 1);
1067 } 1301 }
1068 1302
1069 if (gotsig && ev_is_default_loop (EV_A)) 1303 if (sig_pending)
1070 { 1304 {
1071 int signum; 1305 sig_pending = 0;
1072 gotsig = 0;
1073 1306
1074 for (signum = signalmax; signum--; ) 1307 for (i = EV_NSIG - 1; i--; )
1075 if (signals [signum].gotsig) 1308 if (expect_false (signals [i].pending))
1076 ev_feed_signal_event (EV_A_ signum + 1); 1309 ev_feed_signal_event (EV_A_ i + 1);
1077 } 1310 }
1078 1311
1079#if EV_ASYNC_ENABLE 1312#if EV_ASYNC_ENABLE
1080 if (gotasync) 1313 if (async_pending)
1081 { 1314 {
1082 int i; 1315 async_pending = 0;
1083 gotasync = 0;
1084 1316
1085 for (i = asynccnt; i--; ) 1317 for (i = asynccnt; i--; )
1086 if (asyncs [i]->sent) 1318 if (asyncs [i]->sent)
1087 { 1319 {
1088 asyncs [i]->sent = 0; 1320 asyncs [i]->sent = 0;
… …
1096 1328
1097static void 1329static void
1098ev_sighandler (int signum) 1330ev_sighandler (int signum)
1099{ 1331{
1100#if EV_MULTIPLICITY 1332#if EV_MULTIPLICITY
1101 struct ev_loop *loop = &default_loop_struct; 1333 EV_P = signals [signum - 1].loop;
1102#endif 1334#endif
1103 1335
1104#if _WIN32 1336#ifdef _WIN32
1105 signal (signum, ev_sighandler); 1337 signal (signum, ev_sighandler);
1106#endif 1338#endif
1107 1339
1108 signals [signum - 1].gotsig = 1; 1340 signals [signum - 1].pending = 1;
1109 evpipe_write (EV_A_ &gotsig); 1341 evpipe_write (EV_A_ &sig_pending);
1110} 1342}
1111 1343
1112void noinline 1344void noinline
1113ev_feed_signal_event (EV_P_ int signum) 1345ev_feed_signal_event (EV_P_ int signum)
1114{ 1346{
1115 WL w; 1347 WL w;
1116 1348
1349 if (expect_false (signum <= 0 || signum > EV_NSIG))
1350 return;
1351
1352 --signum;
1353
1117#if EV_MULTIPLICITY 1354#if EV_MULTIPLICITY
1118 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1355 /* it is permissible to try to feed a signal to the wrong loop */
1119#endif 1356 /* or, likely more useful, feeding a signal nobody is waiting for */
1120 1357
1121 --signum; 1358 if (expect_false (signals [signum].loop != EV_A))
1122
1123 if (signum < 0 || signum >= signalmax)
1124 return; 1359 return;
1360#endif
1125 1361
1126 signals [signum].gotsig = 0; 1362 signals [signum].pending = 0;
1127 1363
1128 for (w = signals [signum].head; w; w = w->next) 1364 for (w = signals [signum].head; w; w = w->next)
1129 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1365 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1130} 1366}
1131 1367
1368#if EV_USE_SIGNALFD
1369static void
1370sigfdcb (EV_P_ ev_io *iow, int revents)
1371{
1372 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1373
1374 for (;;)
1375 {
1376 ssize_t res = read (sigfd, si, sizeof (si));
1377
1378 /* not ISO-C, as res might be -1, but works with SuS */
1379 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1380 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1381
1382 if (res < (ssize_t)sizeof (si))
1383 break;
1384 }
1385}
1386#endif
1387
1388#endif
1389
1132/*****************************************************************************/ 1390/*****************************************************************************/
1133 1391
1392#if EV_CHILD_ENABLE
1134static WL childs [EV_PID_HASHSIZE]; 1393static WL childs [EV_PID_HASHSIZE];
1135
1136#ifndef _WIN32
1137 1394
1138static ev_signal childev; 1395static ev_signal childev;
1139 1396
1140#ifndef WIFCONTINUED 1397#ifndef WIFCONTINUED
1141# define WIFCONTINUED(status) 0 1398# define WIFCONTINUED(status) 0
1142#endif 1399#endif
1143 1400
1144void inline_speed 1401/* handle a single child status event */
1402inline_speed void
1145child_reap (EV_P_ int chain, int pid, int status) 1403child_reap (EV_P_ int chain, int pid, int status)
1146{ 1404{
1147 ev_child *w; 1405 ev_child *w;
1148 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1406 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1149 1407
… …
1162 1420
1163#ifndef WCONTINUED 1421#ifndef WCONTINUED
1164# define WCONTINUED 0 1422# define WCONTINUED 0
1165#endif 1423#endif
1166 1424
1425/* called on sigchld etc., calls waitpid */
1167static void 1426static void
1168childcb (EV_P_ ev_signal *sw, int revents) 1427childcb (EV_P_ ev_signal *sw, int revents)
1169{ 1428{
1170 int pid, status; 1429 int pid, status;
1171 1430
… …
1252 /* kqueue is borked on everything but netbsd apparently */ 1511 /* kqueue is borked on everything but netbsd apparently */
1253 /* it usually doesn't work correctly on anything but sockets and pipes */ 1512 /* it usually doesn't work correctly on anything but sockets and pipes */
1254 flags &= ~EVBACKEND_KQUEUE; 1513 flags &= ~EVBACKEND_KQUEUE;
1255#endif 1514#endif
1256#ifdef __APPLE__ 1515#ifdef __APPLE__
1257 // flags &= ~EVBACKEND_KQUEUE; for documentation 1516 /* only select works correctly on that "unix-certified" platform */
1258 flags &= ~EVBACKEND_POLL; 1517 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1518 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1259#endif 1519#endif
1260 1520
1261 return flags; 1521 return flags;
1262} 1522}
1263 1523
… …
1277ev_backend (EV_P) 1537ev_backend (EV_P)
1278{ 1538{
1279 return backend; 1539 return backend;
1280} 1540}
1281 1541
1542#if EV_MINIMAL < 2
1282unsigned int 1543unsigned int
1283ev_loop_count (EV_P) 1544ev_loop_count (EV_P)
1284{ 1545{
1285 return loop_count; 1546 return loop_count;
1286} 1547}
1287 1548
1549unsigned int
1550ev_loop_depth (EV_P)
1551{
1552 return loop_depth;
1553}
1554
1288void 1555void
1289ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1556ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1290{ 1557{
1291 io_blocktime = interval; 1558 io_blocktime = interval;
1292} 1559}
… …
1295ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1562ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1296{ 1563{
1297 timeout_blocktime = interval; 1564 timeout_blocktime = interval;
1298} 1565}
1299 1566
1567void
1568ev_set_userdata (EV_P_ void *data)
1569{
1570 userdata = data;
1571}
1572
1573void *
1574ev_userdata (EV_P)
1575{
1576 return userdata;
1577}
1578
1579void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1580{
1581 invoke_cb = invoke_pending_cb;
1582}
1583
1584void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1585{
1586 release_cb = release;
1587 acquire_cb = acquire;
1588}
1589#endif
1590
1591/* initialise a loop structure, must be zero-initialised */
1300static void noinline 1592static void noinline
1301loop_init (EV_P_ unsigned int flags) 1593loop_init (EV_P_ unsigned int flags)
1302{ 1594{
1303 if (!backend) 1595 if (!backend)
1304 { 1596 {
1597#if EV_USE_REALTIME
1598 if (!have_realtime)
1599 {
1600 struct timespec ts;
1601
1602 if (!clock_gettime (CLOCK_REALTIME, &ts))
1603 have_realtime = 1;
1604 }
1605#endif
1606
1305#if EV_USE_MONOTONIC 1607#if EV_USE_MONOTONIC
1608 if (!have_monotonic)
1306 { 1609 {
1307 struct timespec ts; 1610 struct timespec ts;
1611
1308 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1612 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1309 have_monotonic = 1; 1613 have_monotonic = 1;
1310 } 1614 }
1311#endif 1615#endif
1616
1617 /* pid check not overridable via env */
1618#ifndef _WIN32
1619 if (flags & EVFLAG_FORKCHECK)
1620 curpid = getpid ();
1621#endif
1622
1623 if (!(flags & EVFLAG_NOENV)
1624 && !enable_secure ()
1625 && getenv ("LIBEV_FLAGS"))
1626 flags = atoi (getenv ("LIBEV_FLAGS"));
1312 1627
1313 ev_rt_now = ev_time (); 1628 ev_rt_now = ev_time ();
1314 mn_now = get_clock (); 1629 mn_now = get_clock ();
1315 now_floor = mn_now; 1630 now_floor = mn_now;
1316 rtmn_diff = ev_rt_now - mn_now; 1631 rtmn_diff = ev_rt_now - mn_now;
1632#if EV_MINIMAL < 2
1633 invoke_cb = ev_invoke_pending;
1634#endif
1317 1635
1318 io_blocktime = 0.; 1636 io_blocktime = 0.;
1319 timeout_blocktime = 0.; 1637 timeout_blocktime = 0.;
1320 backend = 0; 1638 backend = 0;
1321 backend_fd = -1; 1639 backend_fd = -1;
1322 gotasync = 0; 1640 sig_pending = 0;
1641#if EV_ASYNC_ENABLE
1642 async_pending = 0;
1643#endif
1323#if EV_USE_INOTIFY 1644#if EV_USE_INOTIFY
1324 fs_fd = -2; 1645 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1325#endif 1646#endif
1326 1647#if EV_USE_SIGNALFD
1327 /* pid check not overridable via env */ 1648 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1328#ifndef _WIN32
1329 if (flags & EVFLAG_FORKCHECK)
1330 curpid = getpid ();
1331#endif 1649#endif
1332
1333 if (!(flags & EVFLAG_NOENV)
1334 && !enable_secure ()
1335 && getenv ("LIBEV_FLAGS"))
1336 flags = atoi (getenv ("LIBEV_FLAGS"));
1337 1650
1338 if (!(flags & 0x0000ffffU)) 1651 if (!(flags & 0x0000ffffU))
1339 flags |= ev_recommended_backends (); 1652 flags |= ev_recommended_backends ();
1340 1653
1341#if EV_USE_PORT 1654#if EV_USE_PORT
… …
1352#endif 1665#endif
1353#if EV_USE_SELECT 1666#if EV_USE_SELECT
1354 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1667 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1355#endif 1668#endif
1356 1669
1670 ev_prepare_init (&pending_w, pendingcb);
1671
1672#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1357 ev_init (&pipeev, pipecb); 1673 ev_init (&pipe_w, pipecb);
1358 ev_set_priority (&pipeev, EV_MAXPRI); 1674 ev_set_priority (&pipe_w, EV_MAXPRI);
1675#endif
1359 } 1676 }
1360} 1677}
1361 1678
1679/* free up a loop structure */
1362static void noinline 1680static void noinline
1363loop_destroy (EV_P) 1681loop_destroy (EV_P)
1364{ 1682{
1365 int i; 1683 int i;
1366 1684
1367 if (ev_is_active (&pipeev)) 1685 if (ev_is_active (&pipe_w))
1368 { 1686 {
1369 ev_ref (EV_A); /* signal watcher */ 1687 /*ev_ref (EV_A);*/
1370 ev_io_stop (EV_A_ &pipeev); 1688 /*ev_io_stop (EV_A_ &pipe_w);*/
1371 1689
1372#if EV_USE_EVENTFD 1690#if EV_USE_EVENTFD
1373 if (evfd >= 0) 1691 if (evfd >= 0)
1374 close (evfd); 1692 close (evfd);
1375#endif 1693#endif
1376 1694
1377 if (evpipe [0] >= 0) 1695 if (evpipe [0] >= 0)
1378 { 1696 {
1379 close (evpipe [0]); 1697 EV_WIN32_CLOSE_FD (evpipe [0]);
1380 close (evpipe [1]); 1698 EV_WIN32_CLOSE_FD (evpipe [1]);
1381 } 1699 }
1382 } 1700 }
1701
1702#if EV_USE_SIGNALFD
1703 if (ev_is_active (&sigfd_w))
1704 close (sigfd);
1705#endif
1383 1706
1384#if EV_USE_INOTIFY 1707#if EV_USE_INOTIFY
1385 if (fs_fd >= 0) 1708 if (fs_fd >= 0)
1386 close (fs_fd); 1709 close (fs_fd);
1387#endif 1710#endif
… …
1411#if EV_IDLE_ENABLE 1734#if EV_IDLE_ENABLE
1412 array_free (idle, [i]); 1735 array_free (idle, [i]);
1413#endif 1736#endif
1414 } 1737 }
1415 1738
1416 ev_free (anfds); anfdmax = 0; 1739 ev_free (anfds); anfds = 0; anfdmax = 0;
1417 1740
1418 /* have to use the microsoft-never-gets-it-right macro */ 1741 /* have to use the microsoft-never-gets-it-right macro */
1742 array_free (rfeed, EMPTY);
1419 array_free (fdchange, EMPTY); 1743 array_free (fdchange, EMPTY);
1420 array_free (timer, EMPTY); 1744 array_free (timer, EMPTY);
1421#if EV_PERIODIC_ENABLE 1745#if EV_PERIODIC_ENABLE
1422 array_free (periodic, EMPTY); 1746 array_free (periodic, EMPTY);
1423#endif 1747#endif
… …
1432 1756
1433 backend = 0; 1757 backend = 0;
1434} 1758}
1435 1759
1436#if EV_USE_INOTIFY 1760#if EV_USE_INOTIFY
1437void inline_size infy_fork (EV_P); 1761inline_size void infy_fork (EV_P);
1438#endif 1762#endif
1439 1763
1440void inline_size 1764inline_size void
1441loop_fork (EV_P) 1765loop_fork (EV_P)
1442{ 1766{
1443#if EV_USE_PORT 1767#if EV_USE_PORT
1444 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1768 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1445#endif 1769#endif
… …
1451#endif 1775#endif
1452#if EV_USE_INOTIFY 1776#if EV_USE_INOTIFY
1453 infy_fork (EV_A); 1777 infy_fork (EV_A);
1454#endif 1778#endif
1455 1779
1456 if (ev_is_active (&pipeev)) 1780 if (ev_is_active (&pipe_w))
1457 { 1781 {
1458 /* this "locks" the handlers against writing to the pipe */ 1782 /* this "locks" the handlers against writing to the pipe */
1459 /* while we modify the fd vars */ 1783 /* while we modify the fd vars */
1460 gotsig = 1; 1784 sig_pending = 1;
1461#if EV_ASYNC_ENABLE 1785#if EV_ASYNC_ENABLE
1462 gotasync = 1; 1786 async_pending = 1;
1463#endif 1787#endif
1464 1788
1465 ev_ref (EV_A); 1789 ev_ref (EV_A);
1466 ev_io_stop (EV_A_ &pipeev); 1790 ev_io_stop (EV_A_ &pipe_w);
1467 1791
1468#if EV_USE_EVENTFD 1792#if EV_USE_EVENTFD
1469 if (evfd >= 0) 1793 if (evfd >= 0)
1470 close (evfd); 1794 close (evfd);
1471#endif 1795#endif
1472 1796
1473 if (evpipe [0] >= 0) 1797 if (evpipe [0] >= 0)
1474 { 1798 {
1475 close (evpipe [0]); 1799 EV_WIN32_CLOSE_FD (evpipe [0]);
1476 close (evpipe [1]); 1800 EV_WIN32_CLOSE_FD (evpipe [1]);
1477 } 1801 }
1478 1802
1479 evpipe_init (EV_A); 1803 evpipe_init (EV_A);
1480 /* now iterate over everything, in case we missed something */ 1804 /* now iterate over everything, in case we missed something */
1481 pipecb (EV_A_ &pipeev, EV_READ); 1805 pipecb (EV_A_ &pipe_w, EV_READ);
1482 } 1806 }
1483 1807
1484 postfork = 0; 1808 postfork = 0;
1485} 1809}
1486 1810
1487#if EV_MULTIPLICITY 1811#if EV_MULTIPLICITY
1488 1812
1489struct ev_loop * 1813struct ev_loop *
1490ev_loop_new (unsigned int flags) 1814ev_loop_new (unsigned int flags)
1491{ 1815{
1492 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1816 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1493 1817
1494 memset (loop, 0, sizeof (struct ev_loop)); 1818 memset (EV_A, 0, sizeof (struct ev_loop));
1495
1496 loop_init (EV_A_ flags); 1819 loop_init (EV_A_ flags);
1497 1820
1498 if (ev_backend (EV_A)) 1821 if (ev_backend (EV_A))
1499 return loop; 1822 return EV_A;
1500 1823
1501 return 0; 1824 return 0;
1502} 1825}
1503 1826
1504void 1827void
… …
1511void 1834void
1512ev_loop_fork (EV_P) 1835ev_loop_fork (EV_P)
1513{ 1836{
1514 postfork = 1; /* must be in line with ev_default_fork */ 1837 postfork = 1; /* must be in line with ev_default_fork */
1515} 1838}
1839#endif /* multiplicity */
1516 1840
1517#if EV_VERIFY 1841#if EV_VERIFY
1518static void 1842static void noinline
1843verify_watcher (EV_P_ W w)
1844{
1845 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1846
1847 if (w->pending)
1848 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1849}
1850
1851static void noinline
1852verify_heap (EV_P_ ANHE *heap, int N)
1853{
1854 int i;
1855
1856 for (i = HEAP0; i < N + HEAP0; ++i)
1857 {
1858 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1859 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1860 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1861
1862 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1863 }
1864}
1865
1866static void noinline
1519array_check (W **ws, int cnt) 1867array_verify (EV_P_ W *ws, int cnt)
1520{ 1868{
1521 while (cnt--) 1869 while (cnt--)
1870 {
1522 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 1871 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1872 verify_watcher (EV_A_ ws [cnt]);
1873 }
1523} 1874}
1524#endif 1875#endif
1525 1876
1877#if EV_MINIMAL < 2
1526void 1878void
1527ev_loop_verify (EV_P) 1879ev_loop_verify (EV_P)
1528{ 1880{
1529#if EV_VERIFY 1881#if EV_VERIFY
1530 int i; 1882 int i;
1883 WL w;
1531 1884
1885 assert (activecnt >= -1);
1886
1887 assert (fdchangemax >= fdchangecnt);
1888 for (i = 0; i < fdchangecnt; ++i)
1889 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1890
1891 assert (anfdmax >= 0);
1892 for (i = 0; i < anfdmax; ++i)
1893 for (w = anfds [i].head; w; w = w->next)
1894 {
1895 verify_watcher (EV_A_ (W)w);
1896 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1897 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1898 }
1899
1900 assert (timermax >= timercnt);
1532 checkheap (timers, timercnt); 1901 verify_heap (EV_A_ timers, timercnt);
1902
1533#if EV_PERIODIC_ENABLE 1903#if EV_PERIODIC_ENABLE
1904 assert (periodicmax >= periodiccnt);
1534 checkheap (periodics, periodiccnt); 1905 verify_heap (EV_A_ periodics, periodiccnt);
1535#endif 1906#endif
1536 1907
1908 for (i = NUMPRI; i--; )
1909 {
1910 assert (pendingmax [i] >= pendingcnt [i]);
1537#if EV_IDLE_ENABLE 1911#if EV_IDLE_ENABLE
1538 for (i = NUMPRI; i--; ) 1912 assert (idleall >= 0);
1913 assert (idlemax [i] >= idlecnt [i]);
1539 array_check ((W **)idles [i], idlecnt [i]); 1914 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1540#endif 1915#endif
1916 }
1917
1541#if EV_FORK_ENABLE 1918#if EV_FORK_ENABLE
1919 assert (forkmax >= forkcnt);
1542 array_check ((W **)forks, forkcnt); 1920 array_verify (EV_A_ (W *)forks, forkcnt);
1543#endif 1921#endif
1922
1544#if EV_ASYNC_ENABLE 1923#if EV_ASYNC_ENABLE
1924 assert (asyncmax >= asynccnt);
1545 array_check ((W **)asyncs, asynccnt); 1925 array_verify (EV_A_ (W *)asyncs, asynccnt);
1926#endif
1927
1928 assert (preparemax >= preparecnt);
1929 array_verify (EV_A_ (W *)prepares, preparecnt);
1930
1931 assert (checkmax >= checkcnt);
1932 array_verify (EV_A_ (W *)checks, checkcnt);
1933
1934# if 0
1935#if EV_CHILD_ENABLE
1936 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1937 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1938#endif
1546#endif 1939# endif
1547 array_check ((W **)prepares, preparecnt);
1548 array_check ((W **)checks, checkcnt);
1549#endif 1940#endif
1550} 1941}
1551 1942#endif
1552#endif /* multiplicity */
1553 1943
1554#if EV_MULTIPLICITY 1944#if EV_MULTIPLICITY
1555struct ev_loop * 1945struct ev_loop *
1556ev_default_loop_init (unsigned int flags) 1946ev_default_loop_init (unsigned int flags)
1557#else 1947#else
… …
1560#endif 1950#endif
1561{ 1951{
1562 if (!ev_default_loop_ptr) 1952 if (!ev_default_loop_ptr)
1563 { 1953 {
1564#if EV_MULTIPLICITY 1954#if EV_MULTIPLICITY
1565 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1955 EV_P = ev_default_loop_ptr = &default_loop_struct;
1566#else 1956#else
1567 ev_default_loop_ptr = 1; 1957 ev_default_loop_ptr = 1;
1568#endif 1958#endif
1569 1959
1570 loop_init (EV_A_ flags); 1960 loop_init (EV_A_ flags);
1571 1961
1572 if (ev_backend (EV_A)) 1962 if (ev_backend (EV_A))
1573 { 1963 {
1574#ifndef _WIN32 1964#if EV_CHILD_ENABLE
1575 ev_signal_init (&childev, childcb, SIGCHLD); 1965 ev_signal_init (&childev, childcb, SIGCHLD);
1576 ev_set_priority (&childev, EV_MAXPRI); 1966 ev_set_priority (&childev, EV_MAXPRI);
1577 ev_signal_start (EV_A_ &childev); 1967 ev_signal_start (EV_A_ &childev);
1578 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1968 ev_unref (EV_A); /* child watcher should not keep loop alive */
1579#endif 1969#endif
… …
1587 1977
1588void 1978void
1589ev_default_destroy (void) 1979ev_default_destroy (void)
1590{ 1980{
1591#if EV_MULTIPLICITY 1981#if EV_MULTIPLICITY
1592 struct ev_loop *loop = ev_default_loop_ptr; 1982 EV_P = ev_default_loop_ptr;
1593#endif 1983#endif
1594 1984
1595#ifndef _WIN32 1985 ev_default_loop_ptr = 0;
1986
1987#if EV_CHILD_ENABLE
1596 ev_ref (EV_A); /* child watcher */ 1988 ev_ref (EV_A); /* child watcher */
1597 ev_signal_stop (EV_A_ &childev); 1989 ev_signal_stop (EV_A_ &childev);
1598#endif 1990#endif
1599 1991
1600 loop_destroy (EV_A); 1992 loop_destroy (EV_A);
… …
1602 1994
1603void 1995void
1604ev_default_fork (void) 1996ev_default_fork (void)
1605{ 1997{
1606#if EV_MULTIPLICITY 1998#if EV_MULTIPLICITY
1607 struct ev_loop *loop = ev_default_loop_ptr; 1999 EV_P = ev_default_loop_ptr;
1608#endif 2000#endif
1609 2001
1610 if (backend)
1611 postfork = 1; /* must be in line with ev_loop_fork */ 2002 postfork = 1; /* must be in line with ev_loop_fork */
1612} 2003}
1613 2004
1614/*****************************************************************************/ 2005/*****************************************************************************/
1615 2006
1616void 2007void
1617ev_invoke (EV_P_ void *w, int revents) 2008ev_invoke (EV_P_ void *w, int revents)
1618{ 2009{
1619 EV_CB_INVOKE ((W)w, revents); 2010 EV_CB_INVOKE ((W)w, revents);
1620} 2011}
1621 2012
1622void inline_speed 2013unsigned int
1623call_pending (EV_P) 2014ev_pending_count (EV_P)
2015{
2016 int pri;
2017 unsigned int count = 0;
2018
2019 for (pri = NUMPRI; pri--; )
2020 count += pendingcnt [pri];
2021
2022 return count;
2023}
2024
2025void noinline
2026ev_invoke_pending (EV_P)
1624{ 2027{
1625 int pri; 2028 int pri;
1626 2029
1627 for (pri = NUMPRI; pri--; ) 2030 for (pri = NUMPRI; pri--; )
1628 while (pendingcnt [pri]) 2031 while (pendingcnt [pri])
1629 { 2032 {
1630 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2033 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1631 2034
1632 if (expect_true (p->w))
1633 {
1634 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 2035 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2036 /* ^ this is no longer true, as pending_w could be here */
1635 2037
1636 p->w->pending = 0; 2038 p->w->pending = 0;
1637 EV_CB_INVOKE (p->w, p->events); 2039 EV_CB_INVOKE (p->w, p->events);
1638 EV_FREQUENT_CHECK; 2040 EV_FREQUENT_CHECK;
1639 }
1640 } 2041 }
1641} 2042}
1642 2043
1643#if EV_IDLE_ENABLE 2044#if EV_IDLE_ENABLE
1644void inline_size 2045/* make idle watchers pending. this handles the "call-idle */
2046/* only when higher priorities are idle" logic */
2047inline_size void
1645idle_reify (EV_P) 2048idle_reify (EV_P)
1646{ 2049{
1647 if (expect_false (idleall)) 2050 if (expect_false (idleall))
1648 { 2051 {
1649 int pri; 2052 int pri;
… …
1661 } 2064 }
1662 } 2065 }
1663} 2066}
1664#endif 2067#endif
1665 2068
1666void inline_size 2069/* make timers pending */
2070inline_size void
1667timers_reify (EV_P) 2071timers_reify (EV_P)
1668{ 2072{
1669 EV_FREQUENT_CHECK; 2073 EV_FREQUENT_CHECK;
1670 2074
1671 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 2075 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1672 { 2076 {
1673 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 2077 do
1674
1675 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1676
1677 /* first reschedule or stop timer */
1678 if (w->repeat)
1679 { 2078 {
2079 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2080
2081 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2082
2083 /* first reschedule or stop timer */
2084 if (w->repeat)
2085 {
1680 ev_at (w) += w->repeat; 2086 ev_at (w) += w->repeat;
1681 if (ev_at (w) < mn_now) 2087 if (ev_at (w) < mn_now)
1682 ev_at (w) = mn_now; 2088 ev_at (w) = mn_now;
1683 2089
1684 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2090 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1685 2091
1686 ANHE_at_cache (timers [HEAP0]); 2092 ANHE_at_cache (timers [HEAP0]);
1687 downheap (timers, timercnt, HEAP0); 2093 downheap (timers, timercnt, HEAP0);
2094 }
2095 else
2096 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2097
2098 EV_FREQUENT_CHECK;
2099 feed_reverse (EV_A_ (W)w);
1688 } 2100 }
1689 else 2101 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1690 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1691 2102
1692 EV_FREQUENT_CHECK;
1693 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2103 feed_reverse_done (EV_A_ EV_TIMEOUT);
1694 } 2104 }
1695} 2105}
1696 2106
1697#if EV_PERIODIC_ENABLE 2107#if EV_PERIODIC_ENABLE
1698void inline_size 2108/* make periodics pending */
2109inline_size void
1699periodics_reify (EV_P) 2110periodics_reify (EV_P)
1700{ 2111{
1701 EV_FREQUENT_CHECK; 2112 EV_FREQUENT_CHECK;
1702 2113
1703 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2114 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1704 { 2115 {
1705 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2116 int feed_count = 0;
1706 2117
1707 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2118 do
1708
1709 /* first reschedule or stop timer */
1710 if (w->reschedule_cb)
1711 { 2119 {
2120 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2121
2122 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2123
2124 /* first reschedule or stop timer */
2125 if (w->reschedule_cb)
2126 {
1712 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2127 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1713 2128
1714 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 2129 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1715 2130
1716 ANHE_at_cache (periodics [HEAP0]); 2131 ANHE_at_cache (periodics [HEAP0]);
1717 downheap (periodics, periodiccnt, HEAP0); 2132 downheap (periodics, periodiccnt, HEAP0);
2133 }
2134 else if (w->interval)
2135 {
2136 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2137 /* if next trigger time is not sufficiently in the future, put it there */
2138 /* this might happen because of floating point inexactness */
2139 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2140 {
2141 ev_at (w) += w->interval;
2142
2143 /* if interval is unreasonably low we might still have a time in the past */
2144 /* so correct this. this will make the periodic very inexact, but the user */
2145 /* has effectively asked to get triggered more often than possible */
2146 if (ev_at (w) < ev_rt_now)
2147 ev_at (w) = ev_rt_now;
2148 }
2149
2150 ANHE_at_cache (periodics [HEAP0]);
2151 downheap (periodics, periodiccnt, HEAP0);
2152 }
2153 else
2154 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2155
2156 EV_FREQUENT_CHECK;
2157 feed_reverse (EV_A_ (W)w);
1718 } 2158 }
1719 else if (w->interval) 2159 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1720 {
1721 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1722 /* if next trigger time is not sufficiently in the future, put it there */
1723 /* this might happen because of floating point inexactness */
1724 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1725 {
1726 ev_at (w) += w->interval;
1727 2160
1728 /* if interval is unreasonably low we might still have a time in the past */
1729 /* so correct this. this will make the periodic very inexact, but the user */
1730 /* has effectively asked to get triggered more often than possible */
1731 if (ev_at (w) < ev_rt_now)
1732 ev_at (w) = ev_rt_now;
1733 }
1734
1735 ANHE_at_cache (periodics [HEAP0]);
1736 downheap (periodics, periodiccnt, HEAP0);
1737 }
1738 else
1739 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1740
1741 EV_FREQUENT_CHECK;
1742 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2161 feed_reverse_done (EV_A_ EV_PERIODIC);
1743 } 2162 }
1744} 2163}
1745 2164
2165/* simply recalculate all periodics */
2166/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1746static void noinline 2167static void noinline
1747periodics_reschedule (EV_P) 2168periodics_reschedule (EV_P)
1748{ 2169{
1749 int i; 2170 int i;
1750 2171
… …
1763 2184
1764 reheap (periodics, periodiccnt); 2185 reheap (periodics, periodiccnt);
1765} 2186}
1766#endif 2187#endif
1767 2188
1768void inline_speed 2189/* adjust all timers by a given offset */
2190static void noinline
2191timers_reschedule (EV_P_ ev_tstamp adjust)
2192{
2193 int i;
2194
2195 for (i = 0; i < timercnt; ++i)
2196 {
2197 ANHE *he = timers + i + HEAP0;
2198 ANHE_w (*he)->at += adjust;
2199 ANHE_at_cache (*he);
2200 }
2201}
2202
2203/* fetch new monotonic and realtime times from the kernel */
2204/* also detect if there was a timejump, and act accordingly */
2205inline_speed void
1769time_update (EV_P_ ev_tstamp max_block) 2206time_update (EV_P_ ev_tstamp max_block)
1770{ 2207{
1771 int i;
1772
1773#if EV_USE_MONOTONIC 2208#if EV_USE_MONOTONIC
1774 if (expect_true (have_monotonic)) 2209 if (expect_true (have_monotonic))
1775 { 2210 {
2211 int i;
1776 ev_tstamp odiff = rtmn_diff; 2212 ev_tstamp odiff = rtmn_diff;
1777 2213
1778 mn_now = get_clock (); 2214 mn_now = get_clock ();
1779 2215
1780 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2216 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1806 ev_rt_now = ev_time (); 2242 ev_rt_now = ev_time ();
1807 mn_now = get_clock (); 2243 mn_now = get_clock ();
1808 now_floor = mn_now; 2244 now_floor = mn_now;
1809 } 2245 }
1810 2246
2247 /* no timer adjustment, as the monotonic clock doesn't jump */
2248 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1811# if EV_PERIODIC_ENABLE 2249# if EV_PERIODIC_ENABLE
1812 periodics_reschedule (EV_A); 2250 periodics_reschedule (EV_A);
1813# endif 2251# endif
1814 /* no timer adjustment, as the monotonic clock doesn't jump */
1815 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1816 } 2252 }
1817 else 2253 else
1818#endif 2254#endif
1819 { 2255 {
1820 ev_rt_now = ev_time (); 2256 ev_rt_now = ev_time ();
1821 2257
1822 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2258 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1823 { 2259 {
2260 /* adjust timers. this is easy, as the offset is the same for all of them */
2261 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1824#if EV_PERIODIC_ENABLE 2262#if EV_PERIODIC_ENABLE
1825 periodics_reschedule (EV_A); 2263 periodics_reschedule (EV_A);
1826#endif 2264#endif
1827 /* adjust timers. this is easy, as the offset is the same for all of them */
1828 for (i = 0; i < timercnt; ++i)
1829 {
1830 ANHE *he = timers + i + HEAP0;
1831 ANHE_w (*he)->at += ev_rt_now - mn_now;
1832 ANHE_at_cache (*he);
1833 }
1834 } 2265 }
1835 2266
1836 mn_now = ev_rt_now; 2267 mn_now = ev_rt_now;
1837 } 2268 }
1838} 2269}
1839 2270
1840void 2271void
1841ev_ref (EV_P)
1842{
1843 ++activecnt;
1844}
1845
1846void
1847ev_unref (EV_P)
1848{
1849 --activecnt;
1850}
1851
1852static int loop_done;
1853
1854void
1855ev_loop (EV_P_ int flags) 2272ev_loop (EV_P_ int flags)
1856{ 2273{
2274#if EV_MINIMAL < 2
2275 ++loop_depth;
2276#endif
2277
2278 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2279
1857 loop_done = EVUNLOOP_CANCEL; 2280 loop_done = EVUNLOOP_CANCEL;
1858 2281
1859 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2282 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1860 2283
1861 do 2284 do
1862 { 2285 {
1863#if EV_VERIFY >= 2 2286#if EV_VERIFY >= 2
1864 ev_loop_verify (EV_A); 2287 ev_loop_verify (EV_A);
… …
1877 /* we might have forked, so queue fork handlers */ 2300 /* we might have forked, so queue fork handlers */
1878 if (expect_false (postfork)) 2301 if (expect_false (postfork))
1879 if (forkcnt) 2302 if (forkcnt)
1880 { 2303 {
1881 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2304 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1882 call_pending (EV_A); 2305 EV_INVOKE_PENDING;
1883 } 2306 }
1884#endif 2307#endif
1885 2308
1886 /* queue prepare watchers (and execute them) */ 2309 /* queue prepare watchers (and execute them) */
1887 if (expect_false (preparecnt)) 2310 if (expect_false (preparecnt))
1888 { 2311 {
1889 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2312 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1890 call_pending (EV_A); 2313 EV_INVOKE_PENDING;
1891 } 2314 }
1892 2315
1893 if (expect_false (!activecnt)) 2316 if (expect_false (loop_done))
1894 break; 2317 break;
1895 2318
1896 /* we might have forked, so reify kernel state if necessary */ 2319 /* we might have forked, so reify kernel state if necessary */
1897 if (expect_false (postfork)) 2320 if (expect_false (postfork))
1898 loop_fork (EV_A); 2321 loop_fork (EV_A);
… …
1905 ev_tstamp waittime = 0.; 2328 ev_tstamp waittime = 0.;
1906 ev_tstamp sleeptime = 0.; 2329 ev_tstamp sleeptime = 0.;
1907 2330
1908 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1909 { 2332 {
2333 /* remember old timestamp for io_blocktime calculation */
2334 ev_tstamp prev_mn_now = mn_now;
2335
1910 /* update time to cancel out callback processing overhead */ 2336 /* update time to cancel out callback processing overhead */
1911 time_update (EV_A_ 1e100); 2337 time_update (EV_A_ 1e100);
1912 2338
1913 waittime = MAX_BLOCKTIME; 2339 waittime = MAX_BLOCKTIME;
1914 2340
… …
1924 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1925 if (waittime > to) waittime = to; 2351 if (waittime > to) waittime = to;
1926 } 2352 }
1927#endif 2353#endif
1928 2354
2355 /* don't let timeouts decrease the waittime below timeout_blocktime */
1929 if (expect_false (waittime < timeout_blocktime)) 2356 if (expect_false (waittime < timeout_blocktime))
1930 waittime = timeout_blocktime; 2357 waittime = timeout_blocktime;
1931 2358
1932 sleeptime = waittime - backend_fudge; 2359 /* extra check because io_blocktime is commonly 0 */
1933
1934 if (expect_true (sleeptime > io_blocktime)) 2360 if (expect_false (io_blocktime))
1935 sleeptime = io_blocktime;
1936
1937 if (sleeptime)
1938 { 2361 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363
2364 if (sleeptime > waittime - backend_fudge)
2365 sleeptime = waittime - backend_fudge;
2366
2367 if (expect_true (sleeptime > 0.))
2368 {
1939 ev_sleep (sleeptime); 2369 ev_sleep (sleeptime);
1940 waittime -= sleeptime; 2370 waittime -= sleeptime;
2371 }
1941 } 2372 }
1942 } 2373 }
1943 2374
2375#if EV_MINIMAL < 2
1944 ++loop_count; 2376 ++loop_count;
2377#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1945 backend_poll (EV_A_ waittime); 2379 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1946 2381
1947 /* update ev_rt_now, do magic */ 2382 /* update ev_rt_now, do magic */
1948 time_update (EV_A_ waittime + sleeptime); 2383 time_update (EV_A_ waittime + sleeptime);
1949 } 2384 }
1950 2385
… …
1961 2396
1962 /* queue check watchers, to be executed first */ 2397 /* queue check watchers, to be executed first */
1963 if (expect_false (checkcnt)) 2398 if (expect_false (checkcnt))
1964 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2399 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1965 2400
1966 call_pending (EV_A); 2401 EV_INVOKE_PENDING;
1967 } 2402 }
1968 while (expect_true ( 2403 while (expect_true (
1969 activecnt 2404 activecnt
1970 && !loop_done 2405 && !loop_done
1971 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2406 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1972 )); 2407 ));
1973 2408
1974 if (loop_done == EVUNLOOP_ONE) 2409 if (loop_done == EVUNLOOP_ONE)
1975 loop_done = EVUNLOOP_CANCEL; 2410 loop_done = EVUNLOOP_CANCEL;
2411
2412#if EV_MINIMAL < 2
2413 --loop_depth;
2414#endif
1976} 2415}
1977 2416
1978void 2417void
1979ev_unloop (EV_P_ int how) 2418ev_unloop (EV_P_ int how)
1980{ 2419{
1981 loop_done = how; 2420 loop_done = how;
1982} 2421}
1983 2422
2423void
2424ev_ref (EV_P)
2425{
2426 ++activecnt;
2427}
2428
2429void
2430ev_unref (EV_P)
2431{
2432 --activecnt;
2433}
2434
2435void
2436ev_now_update (EV_P)
2437{
2438 time_update (EV_A_ 1e100);
2439}
2440
2441void
2442ev_suspend (EV_P)
2443{
2444 ev_now_update (EV_A);
2445}
2446
2447void
2448ev_resume (EV_P)
2449{
2450 ev_tstamp mn_prev = mn_now;
2451
2452 ev_now_update (EV_A);
2453 timers_reschedule (EV_A_ mn_now - mn_prev);
2454#if EV_PERIODIC_ENABLE
2455 /* TODO: really do this? */
2456 periodics_reschedule (EV_A);
2457#endif
2458}
2459
1984/*****************************************************************************/ 2460/*****************************************************************************/
2461/* singly-linked list management, used when the expected list length is short */
1985 2462
1986void inline_size 2463inline_size void
1987wlist_add (WL *head, WL elem) 2464wlist_add (WL *head, WL elem)
1988{ 2465{
1989 elem->next = *head; 2466 elem->next = *head;
1990 *head = elem; 2467 *head = elem;
1991} 2468}
1992 2469
1993void inline_size 2470inline_size void
1994wlist_del (WL *head, WL elem) 2471wlist_del (WL *head, WL elem)
1995{ 2472{
1996 while (*head) 2473 while (*head)
1997 { 2474 {
1998 if (*head == elem) 2475 if (expect_true (*head == elem))
1999 { 2476 {
2000 *head = elem->next; 2477 *head = elem->next;
2001 return; 2478 break;
2002 } 2479 }
2003 2480
2004 head = &(*head)->next; 2481 head = &(*head)->next;
2005 } 2482 }
2006} 2483}
2007 2484
2008void inline_speed 2485/* internal, faster, version of ev_clear_pending */
2486inline_speed void
2009clear_pending (EV_P_ W w) 2487clear_pending (EV_P_ W w)
2010{ 2488{
2011 if (w->pending) 2489 if (w->pending)
2012 { 2490 {
2013 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2491 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2014 w->pending = 0; 2492 w->pending = 0;
2015 } 2493 }
2016} 2494}
2017 2495
2018int 2496int
… …
2022 int pending = w_->pending; 2500 int pending = w_->pending;
2023 2501
2024 if (expect_true (pending)) 2502 if (expect_true (pending))
2025 { 2503 {
2026 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2504 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2505 p->w = (W)&pending_w;
2027 w_->pending = 0; 2506 w_->pending = 0;
2028 p->w = 0;
2029 return p->events; 2507 return p->events;
2030 } 2508 }
2031 else 2509 else
2032 return 0; 2510 return 0;
2033} 2511}
2034 2512
2035void inline_size 2513inline_size void
2036pri_adjust (EV_P_ W w) 2514pri_adjust (EV_P_ W w)
2037{ 2515{
2038 int pri = w->priority; 2516 int pri = ev_priority (w);
2039 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2517 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2040 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2518 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2041 w->priority = pri; 2519 ev_set_priority (w, pri);
2042} 2520}
2043 2521
2044void inline_speed 2522inline_speed void
2045ev_start (EV_P_ W w, int active) 2523ev_start (EV_P_ W w, int active)
2046{ 2524{
2047 pri_adjust (EV_A_ w); 2525 pri_adjust (EV_A_ w);
2048 w->active = active; 2526 w->active = active;
2049 ev_ref (EV_A); 2527 ev_ref (EV_A);
2050} 2528}
2051 2529
2052void inline_size 2530inline_size void
2053ev_stop (EV_P_ W w) 2531ev_stop (EV_P_ W w)
2054{ 2532{
2055 ev_unref (EV_A); 2533 ev_unref (EV_A);
2056 w->active = 0; 2534 w->active = 0;
2057} 2535}
… …
2064 int fd = w->fd; 2542 int fd = w->fd;
2065 2543
2066 if (expect_false (ev_is_active (w))) 2544 if (expect_false (ev_is_active (w)))
2067 return; 2545 return;
2068 2546
2069 assert (("ev_io_start called with negative fd", fd >= 0)); 2547 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2548 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2070 2549
2071 EV_FREQUENT_CHECK; 2550 EV_FREQUENT_CHECK;
2072 2551
2073 ev_start (EV_A_ (W)w, 1); 2552 ev_start (EV_A_ (W)w, 1);
2074 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2553 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2075 wlist_add (&anfds[fd].head, (WL)w); 2554 wlist_add (&anfds[fd].head, (WL)w);
2076 2555
2077 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2556 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2078 w->events &= ~EV_IOFDSET; 2557 w->events &= ~EV__IOFDSET;
2079 2558
2080 EV_FREQUENT_CHECK; 2559 EV_FREQUENT_CHECK;
2081} 2560}
2082 2561
2083void noinline 2562void noinline
… …
2085{ 2564{
2086 clear_pending (EV_A_ (W)w); 2565 clear_pending (EV_A_ (W)w);
2087 if (expect_false (!ev_is_active (w))) 2566 if (expect_false (!ev_is_active (w)))
2088 return; 2567 return;
2089 2568
2090 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2569 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2091 2570
2092 EV_FREQUENT_CHECK; 2571 EV_FREQUENT_CHECK;
2093 2572
2094 wlist_del (&anfds[w->fd].head, (WL)w); 2573 wlist_del (&anfds[w->fd].head, (WL)w);
2095 ev_stop (EV_A_ (W)w); 2574 ev_stop (EV_A_ (W)w);
… …
2105 if (expect_false (ev_is_active (w))) 2584 if (expect_false (ev_is_active (w)))
2106 return; 2585 return;
2107 2586
2108 ev_at (w) += mn_now; 2587 ev_at (w) += mn_now;
2109 2588
2110 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2589 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2111 2590
2112 EV_FREQUENT_CHECK; 2591 EV_FREQUENT_CHECK;
2113 2592
2114 ++timercnt; 2593 ++timercnt;
2115 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 2594 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2118 ANHE_at_cache (timers [ev_active (w)]); 2597 ANHE_at_cache (timers [ev_active (w)]);
2119 upheap (timers, ev_active (w)); 2598 upheap (timers, ev_active (w));
2120 2599
2121 EV_FREQUENT_CHECK; 2600 EV_FREQUENT_CHECK;
2122 2601
2123 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2602 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2124} 2603}
2125 2604
2126void noinline 2605void noinline
2127ev_timer_stop (EV_P_ ev_timer *w) 2606ev_timer_stop (EV_P_ ev_timer *w)
2128{ 2607{
… …
2133 EV_FREQUENT_CHECK; 2612 EV_FREQUENT_CHECK;
2134 2613
2135 { 2614 {
2136 int active = ev_active (w); 2615 int active = ev_active (w);
2137 2616
2138 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2617 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2139 2618
2140 --timercnt; 2619 --timercnt;
2141 2620
2142 if (expect_true (active < timercnt + HEAP0)) 2621 if (expect_true (active < timercnt + HEAP0))
2143 { 2622 {
2144 timers [active] = timers [timercnt + HEAP0]; 2623 timers [active] = timers [timercnt + HEAP0];
2145 adjustheap (timers, timercnt, active); 2624 adjustheap (timers, timercnt, active);
2146 } 2625 }
2147 } 2626 }
2148 2627
2149 EV_FREQUENT_CHECK;
2150
2151 ev_at (w) -= mn_now; 2628 ev_at (w) -= mn_now;
2152 2629
2153 ev_stop (EV_A_ (W)w); 2630 ev_stop (EV_A_ (W)w);
2631
2632 EV_FREQUENT_CHECK;
2154} 2633}
2155 2634
2156void noinline 2635void noinline
2157ev_timer_again (EV_P_ ev_timer *w) 2636ev_timer_again (EV_P_ ev_timer *w)
2158{ 2637{
… …
2176 } 2655 }
2177 2656
2178 EV_FREQUENT_CHECK; 2657 EV_FREQUENT_CHECK;
2179} 2658}
2180 2659
2660ev_tstamp
2661ev_timer_remaining (EV_P_ ev_timer *w)
2662{
2663 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2664}
2665
2181#if EV_PERIODIC_ENABLE 2666#if EV_PERIODIC_ENABLE
2182void noinline 2667void noinline
2183ev_periodic_start (EV_P_ ev_periodic *w) 2668ev_periodic_start (EV_P_ ev_periodic *w)
2184{ 2669{
2185 if (expect_false (ev_is_active (w))) 2670 if (expect_false (ev_is_active (w)))
… …
2187 2672
2188 if (w->reschedule_cb) 2673 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2674 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 2675 else if (w->interval)
2191 { 2676 {
2192 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2677 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2193 /* this formula differs from the one in periodic_reify because we do not always round up */ 2678 /* this formula differs from the one in periodic_reify because we do not always round up */
2194 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2679 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2195 } 2680 }
2196 else 2681 else
2197 ev_at (w) = w->offset; 2682 ev_at (w) = w->offset;
… …
2205 ANHE_at_cache (periodics [ev_active (w)]); 2690 ANHE_at_cache (periodics [ev_active (w)]);
2206 upheap (periodics, ev_active (w)); 2691 upheap (periodics, ev_active (w));
2207 2692
2208 EV_FREQUENT_CHECK; 2693 EV_FREQUENT_CHECK;
2209 2694
2210 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2695 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2211} 2696}
2212 2697
2213void noinline 2698void noinline
2214ev_periodic_stop (EV_P_ ev_periodic *w) 2699ev_periodic_stop (EV_P_ ev_periodic *w)
2215{ 2700{
… …
2220 EV_FREQUENT_CHECK; 2705 EV_FREQUENT_CHECK;
2221 2706
2222 { 2707 {
2223 int active = ev_active (w); 2708 int active = ev_active (w);
2224 2709
2225 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 2710 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2226 2711
2227 --periodiccnt; 2712 --periodiccnt;
2228 2713
2229 if (expect_true (active < periodiccnt + HEAP0)) 2714 if (expect_true (active < periodiccnt + HEAP0))
2230 { 2715 {
2231 periodics [active] = periodics [periodiccnt + HEAP0]; 2716 periodics [active] = periodics [periodiccnt + HEAP0];
2232 adjustheap (periodics, periodiccnt, active); 2717 adjustheap (periodics, periodiccnt, active);
2233 } 2718 }
2234 } 2719 }
2235 2720
2236 EV_FREQUENT_CHECK;
2237
2238 ev_stop (EV_A_ (W)w); 2721 ev_stop (EV_A_ (W)w);
2722
2723 EV_FREQUENT_CHECK;
2239} 2724}
2240 2725
2241void noinline 2726void noinline
2242ev_periodic_again (EV_P_ ev_periodic *w) 2727ev_periodic_again (EV_P_ ev_periodic *w)
2243{ 2728{
… …
2249 2734
2250#ifndef SA_RESTART 2735#ifndef SA_RESTART
2251# define SA_RESTART 0 2736# define SA_RESTART 0
2252#endif 2737#endif
2253 2738
2739#if EV_SIGNAL_ENABLE
2740
2254void noinline 2741void noinline
2255ev_signal_start (EV_P_ ev_signal *w) 2742ev_signal_start (EV_P_ ev_signal *w)
2256{ 2743{
2257#if EV_MULTIPLICITY
2258 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2259#endif
2260 if (expect_false (ev_is_active (w))) 2744 if (expect_false (ev_is_active (w)))
2261 return; 2745 return;
2262 2746
2263 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2747 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2264 2748
2265 evpipe_init (EV_A); 2749#if EV_MULTIPLICITY
2750 assert (("libev: a signal must not be attached to two different loops",
2751 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2266 2752
2267 EV_FREQUENT_CHECK; 2753 signals [w->signum - 1].loop = EV_A;
2754#endif
2268 2755
2756 EV_FREQUENT_CHECK;
2757
2758#if EV_USE_SIGNALFD
2759 if (sigfd == -2)
2269 { 2760 {
2270#ifndef _WIN32 2761 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2271 sigset_t full, prev; 2762 if (sigfd < 0 && errno == EINVAL)
2272 sigfillset (&full); 2763 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2273 sigprocmask (SIG_SETMASK, &full, &prev);
2274#endif
2275 2764
2276 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2765 if (sigfd >= 0)
2766 {
2767 fd_intern (sigfd); /* doing it twice will not hurt */
2277 2768
2278#ifndef _WIN32 2769 sigemptyset (&sigfd_set);
2279 sigprocmask (SIG_SETMASK, &prev, 0); 2770
2280#endif 2771 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2772 ev_set_priority (&sigfd_w, EV_MAXPRI);
2773 ev_io_start (EV_A_ &sigfd_w);
2774 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2775 }
2281 } 2776 }
2777
2778 if (sigfd >= 0)
2779 {
2780 /* TODO: check .head */
2781 sigaddset (&sigfd_set, w->signum);
2782 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2783
2784 signalfd (sigfd, &sigfd_set, 0);
2785 }
2786#endif
2282 2787
2283 ev_start (EV_A_ (W)w, 1); 2788 ev_start (EV_A_ (W)w, 1);
2284 wlist_add (&signals [w->signum - 1].head, (WL)w); 2789 wlist_add (&signals [w->signum - 1].head, (WL)w);
2285 2790
2286 if (!((WL)w)->next) 2791 if (!((WL)w)->next)
2792# if EV_USE_SIGNALFD
2793 if (sigfd < 0) /*TODO*/
2794# endif
2287 { 2795 {
2288#if _WIN32 2796# ifdef _WIN32
2797 evpipe_init (EV_A);
2798
2289 signal (w->signum, ev_sighandler); 2799 signal (w->signum, ev_sighandler);
2290#else 2800# else
2291 struct sigaction sa; 2801 struct sigaction sa;
2802
2803 evpipe_init (EV_A);
2804
2292 sa.sa_handler = ev_sighandler; 2805 sa.sa_handler = ev_sighandler;
2293 sigfillset (&sa.sa_mask); 2806 sigfillset (&sa.sa_mask);
2294 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2807 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2295 sigaction (w->signum, &sa, 0); 2808 sigaction (w->signum, &sa, 0);
2809
2810 sigemptyset (&sa.sa_mask);
2811 sigaddset (&sa.sa_mask, w->signum);
2812 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2296#endif 2813#endif
2297 } 2814 }
2298 2815
2299 EV_FREQUENT_CHECK; 2816 EV_FREQUENT_CHECK;
2300} 2817}
2301 2818
2302void noinline 2819void noinline
… …
2310 2827
2311 wlist_del (&signals [w->signum - 1].head, (WL)w); 2828 wlist_del (&signals [w->signum - 1].head, (WL)w);
2312 ev_stop (EV_A_ (W)w); 2829 ev_stop (EV_A_ (W)w);
2313 2830
2314 if (!signals [w->signum - 1].head) 2831 if (!signals [w->signum - 1].head)
2832 {
2833#if EV_MULTIPLICITY
2834 signals [w->signum - 1].loop = 0; /* unattach from signal */
2835#endif
2836#if EV_USE_SIGNALFD
2837 if (sigfd >= 0)
2838 {
2839 sigset_t ss;
2840
2841 sigemptyset (&ss);
2842 sigaddset (&ss, w->signum);
2843 sigdelset (&sigfd_set, w->signum);
2844
2845 signalfd (sigfd, &sigfd_set, 0);
2846 sigprocmask (SIG_UNBLOCK, &ss, 0);
2847 }
2848 else
2849#endif
2315 signal (w->signum, SIG_DFL); 2850 signal (w->signum, SIG_DFL);
2851 }
2316 2852
2317 EV_FREQUENT_CHECK; 2853 EV_FREQUENT_CHECK;
2318} 2854}
2855
2856#endif
2857
2858#if EV_CHILD_ENABLE
2319 2859
2320void 2860void
2321ev_child_start (EV_P_ ev_child *w) 2861ev_child_start (EV_P_ ev_child *w)
2322{ 2862{
2323#if EV_MULTIPLICITY 2863#if EV_MULTIPLICITY
2324 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2864 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2325#endif 2865#endif
2326 if (expect_false (ev_is_active (w))) 2866 if (expect_false (ev_is_active (w)))
2327 return; 2867 return;
2328 2868
2329 EV_FREQUENT_CHECK; 2869 EV_FREQUENT_CHECK;
… …
2347 ev_stop (EV_A_ (W)w); 2887 ev_stop (EV_A_ (W)w);
2348 2888
2349 EV_FREQUENT_CHECK; 2889 EV_FREQUENT_CHECK;
2350} 2890}
2351 2891
2892#endif
2893
2352#if EV_STAT_ENABLE 2894#if EV_STAT_ENABLE
2353 2895
2354# ifdef _WIN32 2896# ifdef _WIN32
2355# undef lstat 2897# undef lstat
2356# define lstat(a,b) _stati64 (a,b) 2898# define lstat(a,b) _stati64 (a,b)
2357# endif 2899# endif
2358 2900
2359#define DEF_STAT_INTERVAL 5.0074891 2901#define DEF_STAT_INTERVAL 5.0074891
2902#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2360#define MIN_STAT_INTERVAL 0.1074891 2903#define MIN_STAT_INTERVAL 0.1074891
2361 2904
2362static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2905static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2363 2906
2364#if EV_USE_INOTIFY 2907#if EV_USE_INOTIFY
2365# define EV_INOTIFY_BUFSIZE 8192 2908
2909/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2910# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2366 2911
2367static void noinline 2912static void noinline
2368infy_add (EV_P_ ev_stat *w) 2913infy_add (EV_P_ ev_stat *w)
2369{ 2914{
2370 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); 2915 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);
2371 2916
2372 if (w->wd < 0) 2917 if (w->wd >= 0)
2918 {
2919 struct statfs sfs;
2920
2921 /* now local changes will be tracked by inotify, but remote changes won't */
2922 /* unless the filesystem is known to be local, we therefore still poll */
2923 /* also do poll on <2.6.25, but with normal frequency */
2924
2925 if (!fs_2625)
2926 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2927 else if (!statfs (w->path, &sfs)
2928 && (sfs.f_type == 0x1373 /* devfs */
2929 || sfs.f_type == 0xEF53 /* ext2/3 */
2930 || sfs.f_type == 0x3153464a /* jfs */
2931 || sfs.f_type == 0x52654973 /* reiser3 */
2932 || sfs.f_type == 0x01021994 /* tempfs */
2933 || sfs.f_type == 0x58465342 /* xfs */))
2934 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2935 else
2936 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2373 { 2937 }
2374 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2938 else
2939 {
2940 /* can't use inotify, continue to stat */
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2375 2942
2376 /* monitor some parent directory for speedup hints */ 2943 /* if path is not there, monitor some parent directory for speedup hints */
2377 /* note that exceeding the hardcoded limit is not a correctness issue, */ 2944 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2378 /* but an efficiency issue only */ 2945 /* but an efficiency issue only */
2379 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2946 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2380 { 2947 {
2381 char path [4096]; 2948 char path [4096];
2382 strcpy (path, w->path); 2949 strcpy (path, w->path);
… …
2386 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2953 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2387 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2954 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2388 2955
2389 char *pend = strrchr (path, '/'); 2956 char *pend = strrchr (path, '/');
2390 2957
2391 if (!pend) 2958 if (!pend || pend == path)
2392 break; /* whoops, no '/', complain to your admin */ 2959 break;
2393 2960
2394 *pend = 0; 2961 *pend = 0;
2395 w->wd = inotify_add_watch (fs_fd, path, mask); 2962 w->wd = inotify_add_watch (fs_fd, path, mask);
2396 } 2963 }
2397 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2964 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2398 } 2965 }
2399 } 2966 }
2400 else
2401 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2402 2967
2403 if (w->wd >= 0) 2968 if (w->wd >= 0)
2404 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2969 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2970
2971 /* now re-arm timer, if required */
2972 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2973 ev_timer_again (EV_A_ &w->timer);
2974 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2405} 2975}
2406 2976
2407static void noinline 2977static void noinline
2408infy_del (EV_P_ ev_stat *w) 2978infy_del (EV_P_ ev_stat *w)
2409{ 2979{
… …
2423 2993
2424static void noinline 2994static void noinline
2425infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2995infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2426{ 2996{
2427 if (slot < 0) 2997 if (slot < 0)
2428 /* overflow, need to check for all hahs slots */ 2998 /* overflow, need to check for all hash slots */
2429 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2999 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2430 infy_wd (EV_A_ slot, wd, ev); 3000 infy_wd (EV_A_ slot, wd, ev);
2431 else 3001 else
2432 { 3002 {
2433 WL w_; 3003 WL w_;
… …
2439 3009
2440 if (w->wd == wd || wd == -1) 3010 if (w->wd == wd || wd == -1)
2441 { 3011 {
2442 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3012 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2443 { 3013 {
3014 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2444 w->wd = -1; 3015 w->wd = -1;
2445 infy_add (EV_A_ w); /* re-add, no matter what */ 3016 infy_add (EV_A_ w); /* re-add, no matter what */
2446 } 3017 }
2447 3018
2448 stat_timer_cb (EV_A_ &w->timer, 0); 3019 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2453 3024
2454static void 3025static void
2455infy_cb (EV_P_ ev_io *w, int revents) 3026infy_cb (EV_P_ ev_io *w, int revents)
2456{ 3027{
2457 char buf [EV_INOTIFY_BUFSIZE]; 3028 char buf [EV_INOTIFY_BUFSIZE];
2458 struct inotify_event *ev = (struct inotify_event *)buf;
2459 int ofs; 3029 int ofs;
2460 int len = read (fs_fd, buf, sizeof (buf)); 3030 int len = read (fs_fd, buf, sizeof (buf));
2461 3031
2462 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3032 for (ofs = 0; ofs < len; )
3033 {
3034 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2463 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3035 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3036 ofs += sizeof (struct inotify_event) + ev->len;
3037 }
2464} 3038}
2465 3039
2466void inline_size 3040inline_size unsigned int
3041ev_linux_version (void)
3042{
3043 struct utsname buf;
3044 unsigned int v;
3045 int i;
3046 char *p = buf.release;
3047
3048 if (uname (&buf))
3049 return 0;
3050
3051 for (i = 3+1; --i; )
3052 {
3053 unsigned int c = 0;
3054
3055 for (;;)
3056 {
3057 if (*p >= '0' && *p <= '9')
3058 c = c * 10 + *p++ - '0';
3059 else
3060 {
3061 p += *p == '.';
3062 break;
3063 }
3064 }
3065
3066 v = (v << 8) | c;
3067 }
3068
3069 return v;
3070}
3071
3072inline_size void
3073ev_check_2625 (EV_P)
3074{
3075 /* kernels < 2.6.25 are borked
3076 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3077 */
3078 if (ev_linux_version () < 0x020619)
3079 return;
3080
3081 fs_2625 = 1;
3082}
3083
3084inline_size int
3085infy_newfd (void)
3086{
3087#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3088 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3089 if (fd >= 0)
3090 return fd;
3091#endif
3092 return inotify_init ();
3093}
3094
3095inline_size void
2467infy_init (EV_P) 3096infy_init (EV_P)
2468{ 3097{
2469 if (fs_fd != -2) 3098 if (fs_fd != -2)
2470 return; 3099 return;
2471 3100
3101 fs_fd = -1;
3102
3103 ev_check_2625 (EV_A);
3104
2472 fs_fd = inotify_init (); 3105 fs_fd = infy_newfd ();
2473 3106
2474 if (fs_fd >= 0) 3107 if (fs_fd >= 0)
2475 { 3108 {
3109 fd_intern (fs_fd);
2476 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3110 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2477 ev_set_priority (&fs_w, EV_MAXPRI); 3111 ev_set_priority (&fs_w, EV_MAXPRI);
2478 ev_io_start (EV_A_ &fs_w); 3112 ev_io_start (EV_A_ &fs_w);
3113 ev_unref (EV_A);
2479 } 3114 }
2480} 3115}
2481 3116
2482void inline_size 3117inline_size void
2483infy_fork (EV_P) 3118infy_fork (EV_P)
2484{ 3119{
2485 int slot; 3120 int slot;
2486 3121
2487 if (fs_fd < 0) 3122 if (fs_fd < 0)
2488 return; 3123 return;
2489 3124
3125 ev_ref (EV_A);
3126 ev_io_stop (EV_A_ &fs_w);
2490 close (fs_fd); 3127 close (fs_fd);
2491 fs_fd = inotify_init (); 3128 fs_fd = infy_newfd ();
3129
3130 if (fs_fd >= 0)
3131 {
3132 fd_intern (fs_fd);
3133 ev_io_set (&fs_w, fs_fd, EV_READ);
3134 ev_io_start (EV_A_ &fs_w);
3135 ev_unref (EV_A);
3136 }
2492 3137
2493 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3138 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2494 { 3139 {
2495 WL w_ = fs_hash [slot].head; 3140 WL w_ = fs_hash [slot].head;
2496 fs_hash [slot].head = 0; 3141 fs_hash [slot].head = 0;
… …
2503 w->wd = -1; 3148 w->wd = -1;
2504 3149
2505 if (fs_fd >= 0) 3150 if (fs_fd >= 0)
2506 infy_add (EV_A_ w); /* re-add, no matter what */ 3151 infy_add (EV_A_ w); /* re-add, no matter what */
2507 else 3152 else
3153 {
3154 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3155 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2508 ev_timer_start (EV_A_ &w->timer); 3156 ev_timer_again (EV_A_ &w->timer);
3157 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3158 }
2509 } 3159 }
2510
2511 } 3160 }
2512} 3161}
2513 3162
3163#endif
3164
3165#ifdef _WIN32
3166# define EV_LSTAT(p,b) _stati64 (p, b)
3167#else
3168# define EV_LSTAT(p,b) lstat (p, b)
2514#endif 3169#endif
2515 3170
2516void 3171void
2517ev_stat_stat (EV_P_ ev_stat *w) 3172ev_stat_stat (EV_P_ ev_stat *w)
2518{ 3173{
… …
2525static void noinline 3180static void noinline
2526stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3181stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2527{ 3182{
2528 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3183 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2529 3184
2530 /* we copy this here each the time so that */ 3185 ev_statdata prev = w->attr;
2531 /* prev has the old value when the callback gets invoked */
2532 w->prev = w->attr;
2533 ev_stat_stat (EV_A_ w); 3186 ev_stat_stat (EV_A_ w);
2534 3187
2535 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3188 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2536 if ( 3189 if (
2537 w->prev.st_dev != w->attr.st_dev 3190 prev.st_dev != w->attr.st_dev
2538 || w->prev.st_ino != w->attr.st_ino 3191 || prev.st_ino != w->attr.st_ino
2539 || w->prev.st_mode != w->attr.st_mode 3192 || prev.st_mode != w->attr.st_mode
2540 || w->prev.st_nlink != w->attr.st_nlink 3193 || prev.st_nlink != w->attr.st_nlink
2541 || w->prev.st_uid != w->attr.st_uid 3194 || prev.st_uid != w->attr.st_uid
2542 || w->prev.st_gid != w->attr.st_gid 3195 || prev.st_gid != w->attr.st_gid
2543 || w->prev.st_rdev != w->attr.st_rdev 3196 || prev.st_rdev != w->attr.st_rdev
2544 || w->prev.st_size != w->attr.st_size 3197 || prev.st_size != w->attr.st_size
2545 || w->prev.st_atime != w->attr.st_atime 3198 || prev.st_atime != w->attr.st_atime
2546 || w->prev.st_mtime != w->attr.st_mtime 3199 || prev.st_mtime != w->attr.st_mtime
2547 || w->prev.st_ctime != w->attr.st_ctime 3200 || prev.st_ctime != w->attr.st_ctime
2548 ) { 3201 ) {
3202 /* we only update w->prev on actual differences */
3203 /* in case we test more often than invoke the callback, */
3204 /* to ensure that prev is always different to attr */
3205 w->prev = prev;
3206
2549 #if EV_USE_INOTIFY 3207 #if EV_USE_INOTIFY
3208 if (fs_fd >= 0)
3209 {
2550 infy_del (EV_A_ w); 3210 infy_del (EV_A_ w);
2551 infy_add (EV_A_ w); 3211 infy_add (EV_A_ w);
2552 ev_stat_stat (EV_A_ w); /* avoid race... */ 3212 ev_stat_stat (EV_A_ w); /* avoid race... */
3213 }
2553 #endif 3214 #endif
2554 3215
2555 ev_feed_event (EV_A_ w, EV_STAT); 3216 ev_feed_event (EV_A_ w, EV_STAT);
2556 } 3217 }
2557} 3218}
… …
2560ev_stat_start (EV_P_ ev_stat *w) 3221ev_stat_start (EV_P_ ev_stat *w)
2561{ 3222{
2562 if (expect_false (ev_is_active (w))) 3223 if (expect_false (ev_is_active (w)))
2563 return; 3224 return;
2564 3225
2565 /* since we use memcmp, we need to clear any padding data etc. */
2566 memset (&w->prev, 0, sizeof (ev_statdata));
2567 memset (&w->attr, 0, sizeof (ev_statdata));
2568
2569 ev_stat_stat (EV_A_ w); 3226 ev_stat_stat (EV_A_ w);
2570 3227
3228 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2571 if (w->interval < MIN_STAT_INTERVAL) 3229 w->interval = MIN_STAT_INTERVAL;
2572 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2573 3230
2574 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3231 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2575 ev_set_priority (&w->timer, ev_priority (w)); 3232 ev_set_priority (&w->timer, ev_priority (w));
2576 3233
2577#if EV_USE_INOTIFY 3234#if EV_USE_INOTIFY
2578 infy_init (EV_A); 3235 infy_init (EV_A);
2579 3236
2580 if (fs_fd >= 0) 3237 if (fs_fd >= 0)
2581 infy_add (EV_A_ w); 3238 infy_add (EV_A_ w);
2582 else 3239 else
2583#endif 3240#endif
3241 {
2584 ev_timer_start (EV_A_ &w->timer); 3242 ev_timer_again (EV_A_ &w->timer);
3243 ev_unref (EV_A);
3244 }
2585 3245
2586 ev_start (EV_A_ (W)w, 1); 3246 ev_start (EV_A_ (W)w, 1);
2587 3247
2588 EV_FREQUENT_CHECK; 3248 EV_FREQUENT_CHECK;
2589} 3249}
… …
2598 EV_FREQUENT_CHECK; 3258 EV_FREQUENT_CHECK;
2599 3259
2600#if EV_USE_INOTIFY 3260#if EV_USE_INOTIFY
2601 infy_del (EV_A_ w); 3261 infy_del (EV_A_ w);
2602#endif 3262#endif
3263
3264 if (ev_is_active (&w->timer))
3265 {
3266 ev_ref (EV_A);
2603 ev_timer_stop (EV_A_ &w->timer); 3267 ev_timer_stop (EV_A_ &w->timer);
3268 }
2604 3269
2605 ev_stop (EV_A_ (W)w); 3270 ev_stop (EV_A_ (W)w);
2606 3271
2607 EV_FREQUENT_CHECK; 3272 EV_FREQUENT_CHECK;
2608} 3273}
… …
2749embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3414embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2750{ 3415{
2751 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3416 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2752 3417
2753 { 3418 {
2754 struct ev_loop *loop = w->other; 3419 EV_P = w->other;
2755 3420
2756 while (fdchangecnt) 3421 while (fdchangecnt)
2757 { 3422 {
2758 fd_reify (EV_A); 3423 fd_reify (EV_A);
2759 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3424 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2760 } 3425 }
2761 } 3426 }
2762} 3427}
2763 3428
3429static void
3430embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3431{
3432 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3433
3434 ev_embed_stop (EV_A_ w);
3435
3436 {
3437 EV_P = w->other;
3438
3439 ev_loop_fork (EV_A);
3440 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3441 }
3442
3443 ev_embed_start (EV_A_ w);
3444}
3445
2764#if 0 3446#if 0
2765static void 3447static void
2766embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3448embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2767{ 3449{
2768 ev_idle_stop (EV_A_ idle); 3450 ev_idle_stop (EV_A_ idle);
… …
2774{ 3456{
2775 if (expect_false (ev_is_active (w))) 3457 if (expect_false (ev_is_active (w)))
2776 return; 3458 return;
2777 3459
2778 { 3460 {
2779 struct ev_loop *loop = w->other; 3461 EV_P = w->other;
2780 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3462 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2781 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3463 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2782 } 3464 }
2783 3465
2784 EV_FREQUENT_CHECK; 3466 EV_FREQUENT_CHECK;
2785 3467
… …
2788 3470
2789 ev_prepare_init (&w->prepare, embed_prepare_cb); 3471 ev_prepare_init (&w->prepare, embed_prepare_cb);
2790 ev_set_priority (&w->prepare, EV_MINPRI); 3472 ev_set_priority (&w->prepare, EV_MINPRI);
2791 ev_prepare_start (EV_A_ &w->prepare); 3473 ev_prepare_start (EV_A_ &w->prepare);
2792 3474
3475 ev_fork_init (&w->fork, embed_fork_cb);
3476 ev_fork_start (EV_A_ &w->fork);
3477
2793 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3478 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2794 3479
2795 ev_start (EV_A_ (W)w, 1); 3480 ev_start (EV_A_ (W)w, 1);
2796 3481
2797 EV_FREQUENT_CHECK; 3482 EV_FREQUENT_CHECK;
… …
2804 if (expect_false (!ev_is_active (w))) 3489 if (expect_false (!ev_is_active (w)))
2805 return; 3490 return;
2806 3491
2807 EV_FREQUENT_CHECK; 3492 EV_FREQUENT_CHECK;
2808 3493
2809 ev_io_stop (EV_A_ &w->io); 3494 ev_io_stop (EV_A_ &w->io);
2810 ev_prepare_stop (EV_A_ &w->prepare); 3495 ev_prepare_stop (EV_A_ &w->prepare);
3496 ev_fork_stop (EV_A_ &w->fork);
2811 3497
2812 ev_stop (EV_A_ (W)w); 3498 ev_stop (EV_A_ (W)w);
2813 3499
2814 EV_FREQUENT_CHECK; 3500 EV_FREQUENT_CHECK;
2815} 3501}
… …
2894 3580
2895void 3581void
2896ev_async_send (EV_P_ ev_async *w) 3582ev_async_send (EV_P_ ev_async *w)
2897{ 3583{
2898 w->sent = 1; 3584 w->sent = 1;
2899 evpipe_write (EV_A_ &gotasync); 3585 evpipe_write (EV_A_ &async_pending);
2900} 3586}
2901#endif 3587#endif
2902 3588
2903/*****************************************************************************/ 3589/*****************************************************************************/
2904 3590
… …
2914once_cb (EV_P_ struct ev_once *once, int revents) 3600once_cb (EV_P_ struct ev_once *once, int revents)
2915{ 3601{
2916 void (*cb)(int revents, void *arg) = once->cb; 3602 void (*cb)(int revents, void *arg) = once->cb;
2917 void *arg = once->arg; 3603 void *arg = once->arg;
2918 3604
2919 ev_io_stop (EV_A_ &once->io); 3605 ev_io_stop (EV_A_ &once->io);
2920 ev_timer_stop (EV_A_ &once->to); 3606 ev_timer_stop (EV_A_ &once->to);
2921 ev_free (once); 3607 ev_free (once);
2922 3608
2923 cb (revents, arg); 3609 cb (revents, arg);
2924} 3610}
2925 3611
2926static void 3612static void
2927once_cb_io (EV_P_ ev_io *w, int revents) 3613once_cb_io (EV_P_ ev_io *w, int revents)
2928{ 3614{
2929 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3615 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3616
3617 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2930} 3618}
2931 3619
2932static void 3620static void
2933once_cb_to (EV_P_ ev_timer *w, int revents) 3621once_cb_to (EV_P_ ev_timer *w, int revents)
2934{ 3622{
2935 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3623 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3624
3625 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2936} 3626}
2937 3627
2938void 3628void
2939ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3629ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2940{ 3630{
… …
2962 ev_timer_set (&once->to, timeout, 0.); 3652 ev_timer_set (&once->to, timeout, 0.);
2963 ev_timer_start (EV_A_ &once->to); 3653 ev_timer_start (EV_A_ &once->to);
2964 } 3654 }
2965} 3655}
2966 3656
3657/*****************************************************************************/
3658
3659#if EV_WALK_ENABLE
3660void
3661ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3662{
3663 int i, j;
3664 ev_watcher_list *wl, *wn;
3665
3666 if (types & (EV_IO | EV_EMBED))
3667 for (i = 0; i < anfdmax; ++i)
3668 for (wl = anfds [i].head; wl; )
3669 {
3670 wn = wl->next;
3671
3672#if EV_EMBED_ENABLE
3673 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3674 {
3675 if (types & EV_EMBED)
3676 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3677 }
3678 else
3679#endif
3680#if EV_USE_INOTIFY
3681 if (ev_cb ((ev_io *)wl) == infy_cb)
3682 ;
3683 else
3684#endif
3685 if ((ev_io *)wl != &pipe_w)
3686 if (types & EV_IO)
3687 cb (EV_A_ EV_IO, wl);
3688
3689 wl = wn;
3690 }
3691
3692 if (types & (EV_TIMER | EV_STAT))
3693 for (i = timercnt + HEAP0; i-- > HEAP0; )
3694#if EV_STAT_ENABLE
3695 /*TODO: timer is not always active*/
3696 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3697 {
3698 if (types & EV_STAT)
3699 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3700 }
3701 else
3702#endif
3703 if (types & EV_TIMER)
3704 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3705
3706#if EV_PERIODIC_ENABLE
3707 if (types & EV_PERIODIC)
3708 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3709 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3710#endif
3711
3712#if EV_IDLE_ENABLE
3713 if (types & EV_IDLE)
3714 for (j = NUMPRI; i--; )
3715 for (i = idlecnt [j]; i--; )
3716 cb (EV_A_ EV_IDLE, idles [j][i]);
3717#endif
3718
3719#if EV_FORK_ENABLE
3720 if (types & EV_FORK)
3721 for (i = forkcnt; i--; )
3722 if (ev_cb (forks [i]) != embed_fork_cb)
3723 cb (EV_A_ EV_FORK, forks [i]);
3724#endif
3725
3726#if EV_ASYNC_ENABLE
3727 if (types & EV_ASYNC)
3728 for (i = asynccnt; i--; )
3729 cb (EV_A_ EV_ASYNC, asyncs [i]);
3730#endif
3731
3732 if (types & EV_PREPARE)
3733 for (i = preparecnt; i--; )
3734#if EV_EMBED_ENABLE
3735 if (ev_cb (prepares [i]) != embed_prepare_cb)
3736#endif
3737 cb (EV_A_ EV_PREPARE, prepares [i]);
3738
3739 if (types & EV_CHECK)
3740 for (i = checkcnt; i--; )
3741 cb (EV_A_ EV_CHECK, checks [i]);
3742
3743 if (types & EV_SIGNAL)
3744 for (i = 0; i < EV_NSIG - 1; ++i)
3745 for (wl = signals [i].head; wl; )
3746 {
3747 wn = wl->next;
3748 cb (EV_A_ EV_SIGNAL, wl);
3749 wl = wn;
3750 }
3751
3752 if (types & EV_CHILD)
3753 for (i = EV_PID_HASHSIZE; i--; )
3754 for (wl = childs [i]; wl; )
3755 {
3756 wn = wl->next;
3757 cb (EV_A_ EV_CHILD, wl);
3758 wl = wn;
3759 }
3760/* EV_STAT 0x00001000 /* stat data changed */
3761/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3762}
3763#endif
3764
2967#if EV_MULTIPLICITY 3765#if EV_MULTIPLICITY
2968 #include "ev_wrap.h" 3766 #include "ev_wrap.h"
2969#endif 3767#endif
2970 3768
2971#ifdef __cplusplus 3769#ifdef __cplusplus

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