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Comparing libev/ev.c (file contents):
Revision 1.502 by root, Tue Jul 2 06:07:54 2019 UTC vs.
Revision 1.512 by root, Fri Nov 22 19:54:38 2019 UTC

… …
124# else 124# else
125# undef EV_USE_LINUXAIO 125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0 126# define EV_USE_LINUXAIO 0
127# endif 127# endif
128 128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
130# ifndef EV_USE_IOURING
131# define EV_USE_IOURING EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_IOURING
135# define EV_USE_IOURING 0
136# endif
137
129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
130# ifndef EV_USE_KQUEUE 139# ifndef EV_USE_KQUEUE
131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
132# endif 141# endif
133# else 142# else
… …
168# endif 177# endif
169# else 178# else
170# undef EV_USE_EVENTFD 179# undef EV_USE_EVENTFD
171# define EV_USE_EVENTFD 0 180# define EV_USE_EVENTFD 0
172# endif 181# endif
173 182
174#endif 183#endif
175 184
176/* OS X, in its infinite idiocy, actually HARDCODES 185/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains, 186 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were 187 * OS X engineers apparently have a vacuum. Or maybe they were
… …
333# define EV_USE_LINUXAIO 0 342# define EV_USE_LINUXAIO 0
334# endif 343# endif
335#endif 344#endif
336 345
337#ifndef EV_USE_IOURING 346#ifndef EV_USE_IOURING
338# if __linux 347# if __linux /* later checks might disable again */
339# define EV_USE_IOURING 0 348# define EV_USE_IOURING 1
340# else 349# else
341# define EV_USE_IOURING 0 350# define EV_USE_IOURING 0
342# endif 351# endif
343#endif 352#endif
344 353
… …
438#if !EV_STAT_ENABLE 447#if !EV_STAT_ENABLE
439# undef EV_USE_INOTIFY 448# undef EV_USE_INOTIFY
440# define EV_USE_INOTIFY 0 449# define EV_USE_INOTIFY 0
441#endif 450#endif
442 451
452#if __linux && EV_USE_IOURING
453# include <linux/version.h>
454# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
455# undef EV_USE_IOURING
456# define EV_USE_IOURING 0
457# endif
458#endif
459
443#if !EV_USE_NANOSLEEP 460#if !EV_USE_NANOSLEEP
444/* hp-ux has it in sys/time.h, which we unconditionally include above */ 461/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux 462# if !defined _WIN32 && !defined __hpux
446# include <sys/select.h> 463# include <sys/select.h>
447# endif 464# endif
… …
457# endif 474# endif
458#endif 475#endif
459 476
460#if EV_USE_IOURING 477#if EV_USE_IOURING
461# include <sys/syscall.h> 478# include <sys/syscall.h>
462# if !__alpha && !SYS_io_uring_setup 479# if !SYS_io_uring_setup && __linux && !__alpha
463# define SYS_io_uring_setup 425 480# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426 481# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427 482# define SYS_io_uring_wregister 427
466# endif 483# endif
467# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */ 484# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
… …
536/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 553/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
537 554
538#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 555#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
539#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 556#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
540 557
541/* find a portable timestamp that is "alawys" in the future but fits into time_t. 558/* find a portable timestamp that is "always" in the future but fits into time_t.
542 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t, 559 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
543 * and sizes large than 32 bit, but and maybe the unlikely loating point time_t */ 560 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
544#define EV_TSTAMP_HUGE \ 561#define EV_TSTAMP_HUGE \
545 (sizeof (time_t) >= 8 ? 10000000000000. \ 562 (sizeof (time_t) >= 8 ? 10000000000000. \
546 : 0 < (time_t)4294967295 ? 4294967295. \ 563 : 0 < (time_t)4294967295 ? 4294967295. \
547 : 2147483647.) \ 564 : 2147483647.) \
548 565
566#ifndef EV_TS_CONST
567# define EV_TS_CONST(nv) nv
568# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
569# define EV_TS_FROM_USEC(us) us * 1e-6
549#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 570# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
550#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 571# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
572# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
573# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
574#endif
551 575
552/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 576/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
553/* ECB.H BEGIN */ 577/* ECB.H BEGIN */
554/* 578/*
555 * libecb - http://software.schmorp.de/pkg/libecb 579 * libecb - http://software.schmorp.de/pkg/libecb
… …
1726 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1750 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1727#else 1751#else
1728 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; 1752 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1729#endif 1753#endif
1730 1754
1755 /* special treatment for negative arguments */
1756 if (ecb_expect_false (v < 0.))
1757 {
1758 ev_tstamp f = -ev_floor (-v);
1759
1760 return f - (f == v ? 0 : 1);
1761 }
1762
1731 /* argument too large for an unsigned long? */ 1763 /* argument too large for an unsigned long? then reduce it */
1732 if (ecb_expect_false (v >= shift)) 1764 if (ecb_expect_false (v >= shift))
1733 { 1765 {
1734 ev_tstamp f; 1766 ev_tstamp f;
1735 1767
1736 if (v == v - 1.) 1768 if (v == v - 1.)
1737 return v; /* very large number */ 1769 return v; /* very large numbers are assumed to be integer */
1738 1770
1739 f = shift * ev_floor (v * (1. / shift)); 1771 f = shift * ev_floor (v * (1. / shift));
1740 return f + ev_floor (v - f); 1772 return f + ev_floor (v - f);
1741 }
1742
1743 /* special treatment for negative args? */
1744 if (ecb_expect_false (v < 0.))
1745 {
1746 ev_tstamp f = -ev_floor (-v);
1747
1748 return f - (f == v ? 0 : 1);
1749 } 1773 }
1750 1774
1751 /* fits into an unsigned long */ 1775 /* fits into an unsigned long */
1752 return (unsigned long)v; 1776 return (unsigned long)v;
1753} 1777}
… …
1961 static struct ev_loop default_loop_struct; 1985 static struct ev_loop default_loop_struct;
1962 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ 1986 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1963 1987
1964#else 1988#else
1965 1989
1966 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */ 1990 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
1967 #define VAR(name,decl) static decl; 1991 #define VAR(name,decl) static decl;
1968 #include "ev_vars.h" 1992 #include "ev_vars.h"
1969 #undef VAR 1993 #undef VAR
1970 1994
1971 static int ev_default_loop_ptr; 1995 static int ev_default_loop_ptr;
… …
1993#if EV_USE_REALTIME 2017#if EV_USE_REALTIME
1994 if (ecb_expect_true (have_realtime)) 2018 if (ecb_expect_true (have_realtime))
1995 { 2019 {
1996 struct timespec ts; 2020 struct timespec ts;
1997 clock_gettime (CLOCK_REALTIME, &ts); 2021 clock_gettime (CLOCK_REALTIME, &ts);
1998 return ts.tv_sec + ts.tv_nsec * 1e-9; 2022 return EV_TS_GET (ts);
1999 } 2023 }
2000#endif 2024#endif
2001 2025
2026 {
2002 struct timeval tv; 2027 struct timeval tv;
2003 gettimeofday (&tv, 0); 2028 gettimeofday (&tv, 0);
2004 return tv.tv_sec + tv.tv_usec * 1e-6; 2029 return EV_TV_GET (tv);
2030 }
2005} 2031}
2006#endif 2032#endif
2007 2033
2008inline_size ev_tstamp 2034inline_size ev_tstamp
2009get_clock (void) 2035get_clock (void)
… …
2011#if EV_USE_MONOTONIC 2037#if EV_USE_MONOTONIC
2012 if (ecb_expect_true (have_monotonic)) 2038 if (ecb_expect_true (have_monotonic))
2013 { 2039 {
2014 struct timespec ts; 2040 struct timespec ts;
2015 clock_gettime (CLOCK_MONOTONIC, &ts); 2041 clock_gettime (CLOCK_MONOTONIC, &ts);
2016 return ts.tv_sec + ts.tv_nsec * 1e-9; 2042 return EV_TS_GET (ts);
2017 } 2043 }
2018#endif 2044#endif
2019 2045
2020 return ev_time (); 2046 return ev_time ();
2021} 2047}
… …
2029#endif 2055#endif
2030 2056
2031void 2057void
2032ev_sleep (ev_tstamp delay) EV_NOEXCEPT 2058ev_sleep (ev_tstamp delay) EV_NOEXCEPT
2033{ 2059{
2034 if (delay > 0.) 2060 if (delay > EV_TS_CONST (0.))
2035 { 2061 {
2036#if EV_USE_NANOSLEEP 2062#if EV_USE_NANOSLEEP
2037 struct timespec ts; 2063 struct timespec ts;
2038 2064
2039 EV_TS_SET (ts, delay); 2065 EV_TS_SET (ts, delay);
2040 nanosleep (&ts, 0); 2066 nanosleep (&ts, 0);
2041#elif defined _WIN32 2067#elif defined _WIN32
2042 /* maybe this should round up, as ms is very low resolution */ 2068 /* maybe this should round up, as ms is very low resolution */
2043 /* compared to select (µs) or nanosleep (ns) */ 2069 /* compared to select (µs) or nanosleep (ns) */
2044 Sleep ((unsigned long)(delay * 1e3)); 2070 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
2045#else 2071#else
2046 struct timeval tv; 2072 struct timeval tv;
2047 2073
2048 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2074 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
2049 /* something not guaranteed by newer posix versions, but guaranteed */ 2075 /* something not guaranteed by newer posix versions, but guaranteed */
… …
2399 2425
2400 /* find minimum child */ 2426 /* find minimum child */
2401 if (ecb_expect_true (pos + DHEAP - 1 < E)) 2427 if (ecb_expect_true (pos + DHEAP - 1 < E))
2402 { 2428 {
2403 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2429 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2404 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2430 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2405 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2431 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2406 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2432 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2407 } 2433 }
2408 else if (pos < E) 2434 else if (pos < E)
2409 { 2435 {
2410 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2436 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2411 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2437 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2412 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2438 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2413 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2439 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2414 } 2440 }
2415 else 2441 else
2416 break; 2442 break;
2417 2443
2418 if (ANHE_at (he) <= minat) 2444 if (ANHE_at (he) <= minat)
… …
2426 2452
2427 heap [k] = he; 2453 heap [k] = he;
2428 ev_active (ANHE_w (he)) = k; 2454 ev_active (ANHE_w (he)) = k;
2429} 2455}
2430 2456
2431#else /* 4HEAP */ 2457#else /* not 4HEAP */
2432 2458
2433#define HEAP0 1 2459#define HEAP0 1
2434#define HPARENT(k) ((k) >> 1) 2460#define HPARENT(k) ((k) >> 1)
2435#define UPHEAP_DONE(p,k) (!(p)) 2461#define UPHEAP_DONE(p,k) (!(p))
2436 2462
… …
3540 { 3566 {
3541 ev_at (w) += w->repeat; 3567 ev_at (w) += w->repeat;
3542 if (ev_at (w) < mn_now) 3568 if (ev_at (w) < mn_now)
3543 ev_at (w) = mn_now; 3569 ev_at (w) = mn_now;
3544 3570
3545 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3571 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
3546 3572
3547 ANHE_at_cache (timers [HEAP0]); 3573 ANHE_at_cache (timers [HEAP0]);
3548 downheap (timers, timercnt, HEAP0); 3574 downheap (timers, timercnt, HEAP0);
3549 } 3575 }
3550 else 3576 else
… …
3681 3707
3682 mn_now = get_clock (); 3708 mn_now = get_clock ();
3683 3709
3684 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3710 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3685 /* interpolate in the meantime */ 3711 /* interpolate in the meantime */
3686 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3712 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
3687 { 3713 {
3688 ev_rt_now = rtmn_diff + mn_now; 3714 ev_rt_now = rtmn_diff + mn_now;
3689 return; 3715 return;
3690 } 3716 }
3691 3717
… …
3705 ev_tstamp diff; 3731 ev_tstamp diff;
3706 rtmn_diff = ev_rt_now - mn_now; 3732 rtmn_diff = ev_rt_now - mn_now;
3707 3733
3708 diff = odiff - rtmn_diff; 3734 diff = odiff - rtmn_diff;
3709 3735
3710 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) 3736 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
3711 return; /* all is well */ 3737 return; /* all is well */
3712 3738
3713 ev_rt_now = ev_time (); 3739 ev_rt_now = ev_time ();
3714 mn_now = get_clock (); 3740 mn_now = get_clock ();
3715 now_floor = mn_now; 3741 now_floor = mn_now;
… …
3724 else 3750 else
3725#endif 3751#endif
3726 { 3752 {
3727 ev_rt_now = ev_time (); 3753 ev_rt_now = ev_time ();
3728 3754
3729 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3755 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
3730 { 3756 {
3731 /* adjust timers. this is easy, as the offset is the same for all of them */ 3757 /* adjust timers. this is easy, as the offset is the same for all of them */
3732 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3758 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3733#if EV_PERIODIC_ENABLE 3759#if EV_PERIODIC_ENABLE
3734 periodics_reschedule (EV_A); 3760 periodics_reschedule (EV_A);
… …
3803 3829
3804 /* remember old timestamp for io_blocktime calculation */ 3830 /* remember old timestamp for io_blocktime calculation */
3805 ev_tstamp prev_mn_now = mn_now; 3831 ev_tstamp prev_mn_now = mn_now;
3806 3832
3807 /* update time to cancel out callback processing overhead */ 3833 /* update time to cancel out callback processing overhead */
3808 time_update (EV_A_ 1e100); 3834 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
3809 3835
3810 /* from now on, we want a pipe-wake-up */ 3836 /* from now on, we want a pipe-wake-up */
3811 pipe_write_wanted = 1; 3837 pipe_write_wanted = 1;
3812 3838
3813 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ 3839 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3814 3840
3815 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 3841 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3816 { 3842 {
3817 waittime = MAX_BLOCKTIME; 3843 waittime = EV_TS_CONST (MAX_BLOCKTIME);
3818 3844
3819 if (timercnt) 3845 if (timercnt)
3820 { 3846 {
3821 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 3847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3822 if (waittime > to) waittime = to; 3848 if (waittime > to) waittime = to;
… …
3845 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3871 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3846 3872
3847 if (sleeptime > waittime - backend_mintime) 3873 if (sleeptime > waittime - backend_mintime)
3848 sleeptime = waittime - backend_mintime; 3874 sleeptime = waittime - backend_mintime;
3849 3875
3850 if (ecb_expect_true (sleeptime > 0.)) 3876 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
3851 { 3877 {
3852 ev_sleep (sleeptime); 3878 ev_sleep (sleeptime);
3853 waittime -= sleeptime; 3879 waittime -= sleeptime;
3854 } 3880 }
3855 } 3881 }
… …
3929} 3955}
3930 3956
3931void 3957void
3932ev_now_update (EV_P) EV_NOEXCEPT 3958ev_now_update (EV_P) EV_NOEXCEPT
3933{ 3959{
3934 time_update (EV_A_ 1e100); 3960 time_update (EV_A_ EV_TSTAMP_HUGE);
3935} 3961}
3936 3962
3937void 3963void
3938ev_suspend (EV_P) EV_NOEXCEPT 3964ev_suspend (EV_P) EV_NOEXCEPT
3939{ 3965{
… …
4170} 4196}
4171 4197
4172ev_tstamp 4198ev_tstamp
4173ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT 4199ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4174{ 4200{
4175 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4201 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
4176} 4202}
4177 4203
4178#if EV_PERIODIC_ENABLE 4204#if EV_PERIODIC_ENABLE
4179ecb_noinline 4205ecb_noinline
4180void 4206void

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