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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.418 by root, Mon Apr 2 23:14:41 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_CPP(extern "C" {) 188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
… …
205#define _DARWIN_UNLIMITED_SELECT 1 219#define _DARWIN_UNLIMITED_SELECT 1
206 220
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 221/* this block tries to deduce configuration from header-defined symbols and defaults */
208 222
209/* try to deduce the maximum number of signals on this platform */ 223/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 224#if defined EV_NSIG
211/* use what's provided */ 225/* use what's provided */
212#elif defined (NSIG) 226#elif defined NSIG
213# define EV_NSIG (NSIG) 227# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 228#elif defined _NSIG
215# define EV_NSIG (_NSIG) 229# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 230#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 231# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 232#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 233# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 234#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 235# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 236#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 237# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 238#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 239# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 240#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 242#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 244#else
231# error "unable to find value for NSIG, please report" 245# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */ 246/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 247/* but consider reporting it, too! :) */
234# define EV_NSIG 65 248# define EV_NSIG 65
235#endif 249#endif
236 250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
237#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 258# else
241# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
242# endif 260# endif
243#endif 261#endif
244 262
245#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 265# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 266# else
249# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
250# endif 268# endif
251#endif 269#endif
… …
377# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
378#endif 396#endif
379 397
380#if !EV_USE_NANOSLEEP 398#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 400# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 401# include <sys/select.h>
384# endif 402# endif
385#endif 403#endif
386 404
387#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
… …
443#else 461#else
444# define EV_FREQUENT_CHECK do { } while (0) 462# define EV_FREQUENT_CHECK do { } while (0)
445#endif 463#endif
446 464
447/* 465/*
448 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 468 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 471
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 474
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
509#ifndef ECB_H
510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 519 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
466#else 526#else
467# define expect(expr,value) (expr) 527 #include <inttypes.h>
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
472#endif 542 #endif
543#endif
473 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #endif
585 #endif
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
590 #define ECB_MEMORY_FENCE __sync_synchronize ()
591 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
592 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
593 #elif _MSC_VER >= 1400 /* VC++ 2005 */
594 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
595 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
596 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
597 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
598 #elif defined _WIN32
599 #include <WinNT.h>
600 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
601 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
602 #include <mbarrier.h>
603 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
604 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
605 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
606 #elif __xlC__
607 #define ECB_MEMORY_FENCE __sync ()
608 #endif
609#endif
610
611#ifndef ECB_MEMORY_FENCE
612 #if !ECB_AVOID_PTHREADS
613 /*
614 * if you get undefined symbol references to pthread_mutex_lock,
615 * or failure to find pthread.h, then you should implement
616 * the ECB_MEMORY_FENCE operations for your cpu/compiler
617 * OR provide pthread.h and link against the posix thread library
618 * of your system.
619 */
620 #include <pthread.h>
621 #define ECB_NEEDS_PTHREADS 1
622 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
623
624 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
625 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
626 #endif
627#endif
628
629#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
630 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
631#endif
632
633#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
634 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
635#endif
636
637/*****************************************************************************/
638
639#define ECB_C99 (__STDC_VERSION__ >= 199901L)
640
641#if __cplusplus
642 #define ecb_inline static inline
643#elif ECB_GCC_VERSION(2,5)
644 #define ecb_inline static __inline__
645#elif ECB_C99
646 #define ecb_inline static inline
647#else
648 #define ecb_inline static
649#endif
650
651#if ECB_GCC_VERSION(3,3)
652 #define ecb_restrict __restrict__
653#elif ECB_C99
654 #define ecb_restrict restrict
655#else
656 #define ecb_restrict
657#endif
658
659typedef int ecb_bool;
660
661#define ECB_CONCAT_(a, b) a ## b
662#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
663#define ECB_STRINGIFY_(a) # a
664#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
665
666#define ecb_function_ ecb_inline
667
668#if ECB_GCC_VERSION(3,1)
669 #define ecb_attribute(attrlist) __attribute__(attrlist)
670 #define ecb_is_constant(expr) __builtin_constant_p (expr)
671 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
672 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
673#else
674 #define ecb_attribute(attrlist)
675 #define ecb_is_constant(expr) 0
676 #define ecb_expect(expr,value) (expr)
677 #define ecb_prefetch(addr,rw,locality)
678#endif
679
680/* no emulation for ecb_decltype */
681#if ECB_GCC_VERSION(4,5)
682 #define ecb_decltype(x) __decltype(x)
683#elif ECB_GCC_VERSION(3,0)
684 #define ecb_decltype(x) __typeof(x)
685#endif
686
687#define ecb_noinline ecb_attribute ((__noinline__))
688#define ecb_noreturn ecb_attribute ((__noreturn__))
689#define ecb_unused ecb_attribute ((__unused__))
690#define ecb_const ecb_attribute ((__const__))
691#define ecb_pure ecb_attribute ((__pure__))
692
693#if ECB_GCC_VERSION(4,3)
694 #define ecb_artificial ecb_attribute ((__artificial__))
695 #define ecb_hot ecb_attribute ((__hot__))
696 #define ecb_cold ecb_attribute ((__cold__))
697#else
698 #define ecb_artificial
699 #define ecb_hot
700 #define ecb_cold
701#endif
702
703/* put around conditional expressions if you are very sure that the */
704/* expression is mostly true or mostly false. note that these return */
705/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 706#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 707#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
708/* for compatibility to the rest of the world */
709#define ecb_likely(expr) ecb_expect_true (expr)
710#define ecb_unlikely(expr) ecb_expect_false (expr)
711
712/* count trailing zero bits and count # of one bits */
713#if ECB_GCC_VERSION(3,4)
714 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
715 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
716 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
717 #define ecb_ctz32(x) __builtin_ctz (x)
718 #define ecb_ctz64(x) __builtin_ctzll (x)
719 #define ecb_popcount32(x) __builtin_popcount (x)
720 /* no popcountll */
721#else
722 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
723 ecb_function_ int
724 ecb_ctz32 (uint32_t x)
725 {
726 int r = 0;
727
728 x &= ~x + 1; /* this isolates the lowest bit */
729
730#if ECB_branchless_on_i386
731 r += !!(x & 0xaaaaaaaa) << 0;
732 r += !!(x & 0xcccccccc) << 1;
733 r += !!(x & 0xf0f0f0f0) << 2;
734 r += !!(x & 0xff00ff00) << 3;
735 r += !!(x & 0xffff0000) << 4;
736#else
737 if (x & 0xaaaaaaaa) r += 1;
738 if (x & 0xcccccccc) r += 2;
739 if (x & 0xf0f0f0f0) r += 4;
740 if (x & 0xff00ff00) r += 8;
741 if (x & 0xffff0000) r += 16;
742#endif
743
744 return r;
745 }
746
747 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
748 ecb_function_ int
749 ecb_ctz64 (uint64_t x)
750 {
751 int shift = x & 0xffffffffU ? 0 : 32;
752 return ecb_ctz32 (x >> shift) + shift;
753 }
754
755 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
756 ecb_function_ int
757 ecb_popcount32 (uint32_t x)
758 {
759 x -= (x >> 1) & 0x55555555;
760 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
761 x = ((x >> 4) + x) & 0x0f0f0f0f;
762 x *= 0x01010101;
763
764 return x >> 24;
765 }
766
767 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
768 ecb_function_ int ecb_ld32 (uint32_t x)
769 {
770 int r = 0;
771
772 if (x >> 16) { x >>= 16; r += 16; }
773 if (x >> 8) { x >>= 8; r += 8; }
774 if (x >> 4) { x >>= 4; r += 4; }
775 if (x >> 2) { x >>= 2; r += 2; }
776 if (x >> 1) { r += 1; }
777
778 return r;
779 }
780
781 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
782 ecb_function_ int ecb_ld64 (uint64_t x)
783 {
784 int r = 0;
785
786 if (x >> 32) { x >>= 32; r += 32; }
787
788 return r + ecb_ld32 (x);
789 }
790#endif
791
792ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
793ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
794{
795 return ( (x * 0x0802U & 0x22110U)
796 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
797}
798
799ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
800ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
801{
802 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
803 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
804 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
805 x = ( x >> 8 ) | ( x << 8);
806
807 return x;
808}
809
810ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
811ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
812{
813 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
814 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
815 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
816 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
817 x = ( x >> 16 ) | ( x << 16);
818
819 return x;
820}
821
822/* popcount64 is only available on 64 bit cpus as gcc builtin */
823/* so for this version we are lazy */
824ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
825ecb_function_ int
826ecb_popcount64 (uint64_t x)
827{
828 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
829}
830
831ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
832ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
833ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
834ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
835ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
836ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
837ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
838ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
839
840ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
841ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
842ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
843ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
844ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
845ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
846ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
847ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
848
849#if ECB_GCC_VERSION(4,3)
850 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
851 #define ecb_bswap32(x) __builtin_bswap32 (x)
852 #define ecb_bswap64(x) __builtin_bswap64 (x)
853#else
854 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
855 ecb_function_ uint16_t
856 ecb_bswap16 (uint16_t x)
857 {
858 return ecb_rotl16 (x, 8);
859 }
860
861 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
862 ecb_function_ uint32_t
863 ecb_bswap32 (uint32_t x)
864 {
865 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
866 }
867
868 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
869 ecb_function_ uint64_t
870 ecb_bswap64 (uint64_t x)
871 {
872 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
873 }
874#endif
875
876#if ECB_GCC_VERSION(4,5)
877 #define ecb_unreachable() __builtin_unreachable ()
878#else
879 /* this seems to work fine, but gcc always emits a warning for it :/ */
880 ecb_inline void ecb_unreachable (void) ecb_noreturn;
881 ecb_inline void ecb_unreachable (void) { }
882#endif
883
884/* try to tell the compiler that some condition is definitely true */
885#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
886
887ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
888ecb_inline unsigned char
889ecb_byteorder_helper (void)
890{
891 const uint32_t u = 0x11223344;
892 return *(unsigned char *)&u;
893}
894
895ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
896ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
897ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
899
900#if ECB_GCC_VERSION(3,0) || ECB_C99
901 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
902#else
903 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
904#endif
905
906#if __cplusplus
907 template<typename T>
908 static inline T ecb_div_rd (T val, T div)
909 {
910 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
911 }
912 template<typename T>
913 static inline T ecb_div_ru (T val, T div)
914 {
915 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
916 }
917#else
918 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
919 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
920#endif
921
922#if ecb_cplusplus_does_not_suck
923 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
924 template<typename T, int N>
925 static inline int ecb_array_length (const T (&arr)[N])
926 {
927 return N;
928 }
929#else
930 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
931#endif
932
933#endif
934
935/* ECB.H END */
936
937#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
938/* if your architecture doesn't need memory fences, e.g. because it is
939 * single-cpu/core, or if you use libev in a project that doesn't use libev
940 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
941 * libev, in which cases the memory fences become nops.
942 * alternatively, you can remove this #error and link against libpthread,
943 * which will then provide the memory fences.
944 */
945# error "memory fences not defined for your architecture, please report"
946#endif
947
948#ifndef ECB_MEMORY_FENCE
949# define ECB_MEMORY_FENCE do { } while (0)
950# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
952#endif
953
954#define expect_false(cond) ecb_expect_false (cond)
955#define expect_true(cond) ecb_expect_true (cond)
956#define noinline ecb_noinline
957
476#define inline_size static inline 958#define inline_size ecb_inline
477 959
478#if EV_FEATURE_CODE 960#if EV_FEATURE_CODE
479# define inline_speed static inline 961# define inline_speed ecb_inline
480#else 962#else
481# define inline_speed static noinline 963# define inline_speed static noinline
482#endif 964#endif
483 965
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 966#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1005# include "ev_win32.c"
524#endif 1006#endif
525 1007
526/*****************************************************************************/ 1008/*****************************************************************************/
527 1009
1010/* define a suitable floor function (only used by periodics atm) */
1011
1012#if EV_USE_FLOOR
1013# include <math.h>
1014# define ev_floor(v) floor (v)
1015#else
1016
1017#include <float.h>
1018
1019/* a floor() replacement function, should be independent of ev_tstamp type */
1020static ev_tstamp noinline
1021ev_floor (ev_tstamp v)
1022{
1023 /* the choice of shift factor is not terribly important */
1024#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1025 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1026#else
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1028#endif
1029
1030 /* argument too large for an unsigned long? */
1031 if (expect_false (v >= shift))
1032 {
1033 ev_tstamp f;
1034
1035 if (v == v - 1.)
1036 return v; /* very large number */
1037
1038 f = shift * ev_floor (v * (1. / shift));
1039 return f + ev_floor (v - f);
1040 }
1041
1042 /* special treatment for negative args? */
1043 if (expect_false (v < 0.))
1044 {
1045 ev_tstamp f = -ev_floor (-v);
1046
1047 return f - (f == v ? 0 : 1);
1048 }
1049
1050 /* fits into an unsigned long */
1051 return (unsigned long)v;
1052}
1053
1054#endif
1055
1056/*****************************************************************************/
1057
528#ifdef __linux 1058#ifdef __linux
529# include <sys/utsname.h> 1059# include <sys/utsname.h>
530#endif 1060#endif
531 1061
532static unsigned int noinline 1062static unsigned int noinline ecb_cold
533ev_linux_version (void) 1063ev_linux_version (void)
534{ 1064{
535#ifdef __linux 1065#ifdef __linux
536 unsigned int v = 0; 1066 unsigned int v = 0;
537 struct utsname buf; 1067 struct utsname buf;
… …
566} 1096}
567 1097
568/*****************************************************************************/ 1098/*****************************************************************************/
569 1099
570#if EV_AVOID_STDIO 1100#if EV_AVOID_STDIO
571static void noinline 1101static void noinline ecb_cold
572ev_printerr (const char *msg) 1102ev_printerr (const char *msg)
573{ 1103{
574 write (STDERR_FILENO, msg, strlen (msg)); 1104 write (STDERR_FILENO, msg, strlen (msg));
575} 1105}
576#endif 1106#endif
577 1107
578static void (*syserr_cb)(const char *msg); 1108static void (*syserr_cb)(const char *msg);
579 1109
580void 1110void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1111ev_set_syserr_cb (void (*cb)(const char *msg))
582{ 1112{
583 syserr_cb = cb; 1113 syserr_cb = cb;
584} 1114}
585 1115
586static void noinline 1116static void noinline ecb_cold
587ev_syserr (const char *msg) 1117ev_syserr (const char *msg)
588{ 1118{
589 if (!msg) 1119 if (!msg)
590 msg = "(libev) system error"; 1120 msg = "(libev) system error";
591 1121
… …
624#endif 1154#endif
625} 1155}
626 1156
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1157static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
628 1158
629void 1159void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1160ev_set_allocator (void *(*cb)(void *ptr, long size))
631{ 1161{
632 alloc = cb; 1162 alloc = cb;
633} 1163}
634 1164
… …
723 #undef VAR 1253 #undef VAR
724 }; 1254 };
725 #include "ev_wrap.h" 1255 #include "ev_wrap.h"
726 1256
727 static struct ev_loop default_loop_struct; 1257 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1258 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1259
730#else 1260#else
731 1261
732 ev_tstamp ev_rt_now; 1262 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1263 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1264 #include "ev_vars.h"
735 #undef VAR 1265 #undef VAR
736 1266
737 static int ev_default_loop_ptr; 1267 static int ev_default_loop_ptr;
… …
802#if EV_USE_NANOSLEEP 1332#if EV_USE_NANOSLEEP
803 struct timespec ts; 1333 struct timespec ts;
804 1334
805 EV_TS_SET (ts, delay); 1335 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1336 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1337#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1338 Sleep ((unsigned long)(delay * 1e3));
809#else 1339#else
810 struct timeval tv; 1340 struct timeval tv;
811 1341
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1342 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1346 select (0, 0, 0, 0, &tv);
817#endif 1347#endif
818 } 1348 }
819} 1349}
820 1350
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 1351/*****************************************************************************/
830 1352
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1353#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1354
833/* find a suitable new size for the given array, */ 1355/* find a suitable new size for the given array, */
… …
839 1361
840 do 1362 do
841 ncur <<= 1; 1363 ncur <<= 1;
842 while (cnt > ncur); 1364 while (cnt > ncur);
843 1365
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1366 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1367 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1368 {
847 ncur *= elem; 1369 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1370 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1371 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1373 }
852 1374
853 return ncur; 1375 return ncur;
854} 1376}
855 1377
856static noinline void * 1378static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1379array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1380{
859 *cur = array_nextsize (elem, *cur, cnt); 1381 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1382 return ev_realloc (base, elem * *cur);
861} 1383}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1386 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1387
866#define array_needsize(type,base,cur,cnt,init) \ 1388#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1389 if (expect_false ((cnt) > (cur))) \
868 { \ 1390 { \
869 int ocur_ = (cur); \ 1391 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1392 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1393 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1394 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1395 }
874 1396
… …
974inline_size void 1496inline_size void
975fd_reify (EV_P) 1497fd_reify (EV_P)
976{ 1498{
977 int i; 1499 int i;
978 1500
1501#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1502 for (i = 0; i < fdchangecnt; ++i)
1503 {
1504 int fd = fdchanges [i];
1505 ANFD *anfd = anfds + fd;
1506
1507 if (anfd->reify & EV__IOFDSET && anfd->head)
1508 {
1509 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1510
1511 if (handle != anfd->handle)
1512 {
1513 unsigned long arg;
1514
1515 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1516
1517 /* handle changed, but fd didn't - we need to do it in two steps */
1518 backend_modify (EV_A_ fd, anfd->events, 0);
1519 anfd->events = 0;
1520 anfd->handle = handle;
1521 }
1522 }
1523 }
1524#endif
1525
979 for (i = 0; i < fdchangecnt; ++i) 1526 for (i = 0; i < fdchangecnt; ++i)
980 { 1527 {
981 int fd = fdchanges [i]; 1528 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1529 ANFD *anfd = anfds + fd;
983 ev_io *w; 1530 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1532 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1533 unsigned char o_reify = anfd->reify;
987 1534
988 anfd->reify = 0; 1535 anfd->reify = 0;
989 1536
990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
991 if (o_reify & EV__IOFDSET)
992 {
993 unsigned long arg;
994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
997 }
998#endif
999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1537 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1538 {
1002 anfd->events = 0; 1539 anfd->events = 0;
1003 1540
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1541 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1566 fdchanges [fdchangecnt - 1] = fd;
1030 } 1567 }
1031} 1568}
1032 1569
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1570/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1571inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1572fd_kill (EV_P_ int fd)
1036{ 1573{
1037 ev_io *w; 1574 ev_io *w;
1038 1575
1039 while ((w = (ev_io *)anfds [fd].head)) 1576 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1579 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1580 }
1044} 1581}
1045 1582
1046/* check whether the given fd is actually valid, for error recovery */ 1583/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1584inline_size int ecb_cold
1048fd_valid (int fd) 1585fd_valid (int fd)
1049{ 1586{
1050#ifdef _WIN32 1587#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1588 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1589#else
1053 return fcntl (fd, F_GETFD) != -1; 1590 return fcntl (fd, F_GETFD) != -1;
1054#endif 1591#endif
1055} 1592}
1056 1593
1057/* called on EBADF to verify fds */ 1594/* called on EBADF to verify fds */
1058static void noinline 1595static void noinline ecb_cold
1059fd_ebadf (EV_P) 1596fd_ebadf (EV_P)
1060{ 1597{
1061 int fd; 1598 int fd;
1062 1599
1063 for (fd = 0; fd < anfdmax; ++fd) 1600 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1602 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1603 fd_kill (EV_A_ fd);
1067} 1604}
1068 1605
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1606/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1607static void noinline ecb_cold
1071fd_enomem (EV_P) 1608fd_enomem (EV_P)
1072{ 1609{
1073 int fd; 1610 int fd;
1074 1611
1075 for (fd = anfdmax; fd--; ) 1612 for (fd = anfdmax; fd--; )
… …
1270 1807
1271/*****************************************************************************/ 1808/*****************************************************************************/
1272 1809
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1810#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 1811
1275static void noinline 1812static void noinline ecb_cold
1276evpipe_init (EV_P) 1813evpipe_init (EV_P)
1277{ 1814{
1278 if (!ev_is_active (&pipe_w)) 1815 if (!ev_is_active (&pipe_w))
1279 { 1816 {
1280# if EV_USE_EVENTFD 1817# if EV_USE_EVENTFD
… …
1302 ev_io_start (EV_A_ &pipe_w); 1839 ev_io_start (EV_A_ &pipe_w);
1303 ev_unref (EV_A); /* watcher should not keep loop alive */ 1840 ev_unref (EV_A); /* watcher should not keep loop alive */
1304 } 1841 }
1305} 1842}
1306 1843
1307inline_size void 1844inline_speed void
1308evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1845evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309{ 1846{
1310 if (!*flag) 1847 if (expect_true (*flag))
1848 return;
1849
1850 *flag = 1;
1851
1852 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1853
1854 pipe_write_skipped = 1;
1855
1856 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1857
1858 if (pipe_write_wanted)
1311 { 1859 {
1860 int old_errno;
1861
1862 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1863
1312 int old_errno = errno; /* save errno because write might clobber it */ 1864 old_errno = errno; /* save errno because write will clobber it */
1313 char dummy;
1314
1315 *flag = 1;
1316 1865
1317#if EV_USE_EVENTFD 1866#if EV_USE_EVENTFD
1318 if (evfd >= 0) 1867 if (evfd >= 0)
1319 { 1868 {
1320 uint64_t counter = 1; 1869 uint64_t counter = 1;
1321 write (evfd, &counter, sizeof (uint64_t)); 1870 write (evfd, &counter, sizeof (uint64_t));
1322 } 1871 }
1323 else 1872 else
1324#endif 1873#endif
1874 {
1325 /* win32 people keep sending patches that change this write() to send() */ 1875 /* win32 people keep sending patches that change this write() to send() */
1326 /* and then run away. but send() is wrong, it wants a socket handle on win32 */ 1876 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327 /* so when you think this write should be a send instead, please find out */ 1877 /* so when you think this write should be a send instead, please find out */
1328 /* where your send() is from - it's definitely not the microsoft send, and */ 1878 /* where your send() is from - it's definitely not the microsoft send, and */
1329 /* tell me. thank you. */ 1879 /* tell me. thank you. */
1880 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1881 /* check the ev documentation on how to use this flag */
1330 write (evpipe [1], &dummy, 1); 1882 write (evpipe [1], &(evpipe [1]), 1);
1883 }
1331 1884
1332 errno = old_errno; 1885 errno = old_errno;
1333 } 1886 }
1334} 1887}
1335 1888
… …
1338static void 1891static void
1339pipecb (EV_P_ ev_io *iow, int revents) 1892pipecb (EV_P_ ev_io *iow, int revents)
1340{ 1893{
1341 int i; 1894 int i;
1342 1895
1896 if (revents & EV_READ)
1897 {
1343#if EV_USE_EVENTFD 1898#if EV_USE_EVENTFD
1344 if (evfd >= 0) 1899 if (evfd >= 0)
1345 { 1900 {
1346 uint64_t counter; 1901 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 1902 read (evfd, &counter, sizeof (uint64_t));
1348 } 1903 }
1349 else 1904 else
1350#endif 1905#endif
1351 { 1906 {
1352 char dummy; 1907 char dummy;
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1908 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1354 read (evpipe [0], &dummy, 1); 1909 read (evpipe [0], &dummy, 1);
1910 }
1355 } 1911 }
1912
1913 pipe_write_skipped = 0;
1356 1914
1357#if EV_SIGNAL_ENABLE 1915#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 1916 if (sig_pending)
1359 { 1917 {
1360 sig_pending = 0; 1918 sig_pending = 0;
1361 1919
1362 for (i = EV_NSIG - 1; i--; ) 1920 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 1921 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 1922 ev_feed_signal_event (EV_A_ i + 1);
… …
1389 EV_P = signals [signum - 1].loop; 1947 EV_P = signals [signum - 1].loop;
1390 1948
1391 if (!EV_A) 1949 if (!EV_A)
1392 return; 1950 return;
1393#endif 1951#endif
1952
1953 if (!ev_active (&pipe_w))
1954 return;
1394 1955
1395 signals [signum - 1].pending = 1; 1956 signals [signum - 1].pending = 1;
1396 evpipe_write (EV_A_ &sig_pending); 1957 evpipe_write (EV_A_ &sig_pending);
1397} 1958}
1398 1959
… …
1530#endif 2091#endif
1531#if EV_USE_SELECT 2092#if EV_USE_SELECT
1532# include "ev_select.c" 2093# include "ev_select.c"
1533#endif 2094#endif
1534 2095
1535int 2096int ecb_cold
1536ev_version_major (void) 2097ev_version_major (void)
1537{ 2098{
1538 return EV_VERSION_MAJOR; 2099 return EV_VERSION_MAJOR;
1539} 2100}
1540 2101
1541int 2102int ecb_cold
1542ev_version_minor (void) 2103ev_version_minor (void)
1543{ 2104{
1544 return EV_VERSION_MINOR; 2105 return EV_VERSION_MINOR;
1545} 2106}
1546 2107
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2108/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2109int inline_size ecb_cold
1549enable_secure (void) 2110enable_secure (void)
1550{ 2111{
1551#ifdef _WIN32 2112#ifdef _WIN32
1552 return 0; 2113 return 0;
1553#else 2114#else
1554 return getuid () != geteuid () 2115 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2116 || getgid () != getegid ();
1556#endif 2117#endif
1557} 2118}
1558 2119
1559unsigned int 2120unsigned int ecb_cold
1560ev_supported_backends (void) 2121ev_supported_backends (void)
1561{ 2122{
1562 unsigned int flags = 0; 2123 unsigned int flags = 0;
1563 2124
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2125 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2129 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2130
1570 return flags; 2131 return flags;
1571} 2132}
1572 2133
1573unsigned int 2134unsigned int ecb_cold
1574ev_recommended_backends (void) 2135ev_recommended_backends (void)
1575{ 2136{
1576 unsigned int flags = ev_supported_backends (); 2137 unsigned int flags = ev_supported_backends ();
1577 2138
1578#ifndef __NetBSD__ 2139#ifndef __NetBSD__
… …
1590#endif 2151#endif
1591 2152
1592 return flags; 2153 return flags;
1593} 2154}
1594 2155
1595unsigned int 2156unsigned int ecb_cold
1596ev_embeddable_backends (void) 2157ev_embeddable_backends (void)
1597{ 2158{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2159 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2160
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2161 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
… …
1645ev_userdata (EV_P) 2206ev_userdata (EV_P)
1646{ 2207{
1647 return userdata; 2208 return userdata;
1648} 2209}
1649 2210
2211void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2212ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1651{ 2213{
1652 invoke_cb = invoke_pending_cb; 2214 invoke_cb = invoke_pending_cb;
1653} 2215}
1654 2216
2217void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2218ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1656{ 2219{
1657 release_cb = release; 2220 release_cb = release;
1658 acquire_cb = acquire; 2221 acquire_cb = acquire;
1659} 2222}
1660#endif 2223#endif
1661 2224
1662/* initialise a loop structure, must be zero-initialised */ 2225/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2226static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2227loop_init (EV_P_ unsigned int flags)
1665{ 2228{
1666 if (!backend) 2229 if (!backend)
1667 { 2230 {
1668 origflags = flags; 2231 origflags = flags;
… …
1696 if (!(flags & EVFLAG_NOENV) 2259 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2260 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2261 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2262 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2263
1701 ev_rt_now = ev_time (); 2264 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2265 mn_now = get_clock ();
1703 now_floor = mn_now; 2266 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2267 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2268#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2269 invoke_cb = ev_invoke_pending;
1707#endif 2270#endif
1708 2271
1709 io_blocktime = 0.; 2272 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2273 timeout_blocktime = 0.;
1711 backend = 0; 2274 backend = 0;
1712 backend_fd = -1; 2275 backend_fd = -1;
1713 sig_pending = 0; 2276 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2277#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2278 async_pending = 0;
1716#endif 2279#endif
2280 pipe_write_skipped = 0;
2281 pipe_write_wanted = 0;
1717#if EV_USE_INOTIFY 2282#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2283 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2284#endif
1720#if EV_USE_SIGNALFD 2285#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2286 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2287#endif
1723 2288
1724 if (!(flags & EVBACKEND_MASK)) 2289 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2290 flags |= ev_recommended_backends ();
1726 2291
… …
1751#endif 2316#endif
1752 } 2317 }
1753} 2318}
1754 2319
1755/* free up a loop structure */ 2320/* free up a loop structure */
1756void 2321void ecb_cold
1757ev_loop_destroy (EV_P) 2322ev_loop_destroy (EV_P)
1758{ 2323{
1759 int i; 2324 int i;
1760 2325
1761#if EV_MULTIPLICITY 2326#if EV_MULTIPLICITY
… …
1891 infy_fork (EV_A); 2456 infy_fork (EV_A);
1892#endif 2457#endif
1893 2458
1894 if (ev_is_active (&pipe_w)) 2459 if (ev_is_active (&pipe_w))
1895 { 2460 {
1896 /* this "locks" the handlers against writing to the pipe */ 2461 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897 /* while we modify the fd vars */
1898 sig_pending = 1;
1899#if EV_ASYNC_ENABLE
1900 async_pending = 1;
1901#endif
1902 2462
1903 ev_ref (EV_A); 2463 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2464 ev_io_stop (EV_A_ &pipe_w);
1905 2465
1906#if EV_USE_EVENTFD 2466#if EV_USE_EVENTFD
… …
1924 postfork = 0; 2484 postfork = 0;
1925} 2485}
1926 2486
1927#if EV_MULTIPLICITY 2487#if EV_MULTIPLICITY
1928 2488
1929struct ev_loop * 2489struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2490ev_loop_new (unsigned int flags)
1931{ 2491{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2492 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2493
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2494 memset (EV_A, 0, sizeof (struct ev_loop));
… …
1942} 2502}
1943 2503
1944#endif /* multiplicity */ 2504#endif /* multiplicity */
1945 2505
1946#if EV_VERIFY 2506#if EV_VERIFY
1947static void noinline 2507static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2508verify_watcher (EV_P_ W w)
1949{ 2509{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2510 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2511
1952 if (w->pending) 2512 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2513 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2514}
1955 2515
1956static void noinline 2516static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2517verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2518{
1959 int i; 2519 int i;
1960 2520
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2521 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2526
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2527 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2528 }
1969} 2529}
1970 2530
1971static void noinline 2531static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2532array_verify (EV_P_ W *ws, int cnt)
1973{ 2533{
1974 while (cnt--) 2534 while (cnt--)
1975 { 2535 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2536 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2538 }
1979} 2539}
1980#endif 2540#endif
1981 2541
1982#if EV_FEATURE_API 2542#if EV_FEATURE_API
1983void 2543void ecb_cold
1984ev_verify (EV_P) 2544ev_verify (EV_P)
1985{ 2545{
1986#if EV_VERIFY 2546#if EV_VERIFY
1987 int i; 2547 int i;
1988 WL w; 2548 WL w;
… …
2054#endif 2614#endif
2055} 2615}
2056#endif 2616#endif
2057 2617
2058#if EV_MULTIPLICITY 2618#if EV_MULTIPLICITY
2059struct ev_loop * 2619struct ev_loop * ecb_cold
2060#else 2620#else
2061int 2621int
2062#endif 2622#endif
2063ev_default_loop (unsigned int flags) 2623ev_default_loop (unsigned int flags)
2064{ 2624{
… …
2193 } 2753 }
2194} 2754}
2195 2755
2196#if EV_PERIODIC_ENABLE 2756#if EV_PERIODIC_ENABLE
2197 2757
2198inline_speed 2758static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 2759periodic_recalc (EV_P_ ev_periodic *w)
2200{ 2760{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 2761 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 2762 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2763
2764 /* the above almost always errs on the low side */
2765 while (at <= ev_rt_now)
2766 {
2767 ev_tstamp nat = at + w->interval;
2768
2769 /* when resolution fails us, we use ev_rt_now */
2770 if (expect_false (nat == at))
2771 {
2772 at = ev_rt_now;
2773 break;
2774 }
2775
2776 at = nat;
2777 }
2778
2779 ev_at (w) = at;
2204} 2780}
2205 2781
2206/* make periodics pending */ 2782/* make periodics pending */
2207inline_size void 2783inline_size void
2208periodics_reify (EV_P) 2784periodics_reify (EV_P)
… …
2230 downheap (periodics, periodiccnt, HEAP0); 2806 downheap (periodics, periodiccnt, HEAP0);
2231 } 2807 }
2232 else if (w->interval) 2808 else if (w->interval)
2233 { 2809 {
2234 periodic_recalc (EV_A_ w); 2810 periodic_recalc (EV_A_ w);
2235
2236 /* if next trigger time is not sufficiently in the future, put it there */
2237 /* this might happen because of floating point inexactness */
2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239 {
2240 ev_at (w) += w->interval;
2241
2242 /* if interval is unreasonably low we might still have a time in the past */
2243 /* so correct this. this will make the periodic very inexact, but the user */
2244 /* has effectively asked to get triggered more often than possible */
2245 if (ev_at (w) < ev_rt_now)
2246 ev_at (w) = ev_rt_now;
2247 }
2248
2249 ANHE_at_cache (periodics [HEAP0]); 2811 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 2812 downheap (periodics, periodiccnt, HEAP0);
2251 } 2813 }
2252 else 2814 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2815 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 2823 }
2262} 2824}
2263 2825
2264/* simply recalculate all periodics */ 2826/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 2827/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 2828static void noinline ecb_cold
2267periodics_reschedule (EV_P) 2829periodics_reschedule (EV_P)
2268{ 2830{
2269 int i; 2831 int i;
2270 2832
2271 /* adjust periodics after time jump */ 2833 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 2846 reheap (periodics, periodiccnt);
2285} 2847}
2286#endif 2848#endif
2287 2849
2288/* adjust all timers by a given offset */ 2850/* adjust all timers by a given offset */
2289static void noinline 2851static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 2852timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 2853{
2292 int i; 2854 int i;
2293 2855
2294 for (i = 0; i < timercnt; ++i) 2856 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 2893 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 2894 * in the unlikely event of having been preempted here.
2333 */ 2895 */
2334 for (i = 4; --i; ) 2896 for (i = 4; --i; )
2335 { 2897 {
2898 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 2899 rtmn_diff = ev_rt_now - mn_now;
2337 2900
2901 diff = odiff - rtmn_diff;
2902
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2903 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 2904 return; /* all is well */
2340 2905
2341 ev_rt_now = ev_time (); 2906 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 2907 mn_now = get_clock ();
2343 now_floor = mn_now; 2908 now_floor = mn_now;
… …
2365 2930
2366 mn_now = ev_rt_now; 2931 mn_now = ev_rt_now;
2367 } 2932 }
2368} 2933}
2369 2934
2370void 2935int
2371ev_run (EV_P_ int flags) 2936ev_run (EV_P_ int flags)
2372{ 2937{
2373#if EV_FEATURE_API 2938#if EV_FEATURE_API
2374 ++loop_depth; 2939 ++loop_depth;
2375#endif 2940#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 2998 ev_tstamp prev_mn_now = mn_now;
2434 2999
2435 /* update time to cancel out callback processing overhead */ 3000 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3001 time_update (EV_A_ 1e100);
2437 3002
3003 /* from now on, we want a pipe-wake-up */
3004 pipe_write_wanted = 1;
3005
3006 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3007
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3008 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3009 {
2440 waittime = MAX_BLOCKTIME; 3010 waittime = MAX_BLOCKTIME;
2441 3011
2442 if (timercnt) 3012 if (timercnt)
2443 { 3013 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3014 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3015 if (waittime > to) waittime = to;
2446 } 3016 }
2447 3017
2448#if EV_PERIODIC_ENABLE 3018#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3019 if (periodiccnt)
2450 { 3020 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3021 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3022 if (waittime > to) waittime = to;
2453 } 3023 }
2454#endif 3024#endif
2455 3025
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3026 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3027 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3028 waittime = timeout_blocktime;
3029
3030 /* at this point, we NEED to wait, so we have to ensure */
3031 /* to pass a minimum nonzero value to the backend */
3032 if (expect_false (waittime < backend_mintime))
3033 waittime = backend_mintime;
2459 3034
2460 /* extra check because io_blocktime is commonly 0 */ 3035 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3036 if (expect_false (io_blocktime))
2462 { 3037 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3038 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3039
2465 if (sleeptime > waittime - backend_fudge) 3040 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3041 sleeptime = waittime - backend_mintime;
2467 3042
2468 if (expect_true (sleeptime > 0.)) 3043 if (expect_true (sleeptime > 0.))
2469 { 3044 {
2470 ev_sleep (sleeptime); 3045 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3046 waittime -= sleeptime;
… …
2478#endif 3053#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3054 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3055 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3056 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3057
3058 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3059
3060 if (pipe_write_skipped)
3061 {
3062 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3063 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3064 }
3065
3066
2483 /* update ev_rt_now, do magic */ 3067 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3068 time_update (EV_A_ waittime + sleeptime);
2485 } 3069 }
2486 3070
2487 /* queue pending timers and reschedule them */ 3071 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3097 loop_done = EVBREAK_CANCEL;
2514 3098
2515#if EV_FEATURE_API 3099#if EV_FEATURE_API
2516 --loop_depth; 3100 --loop_depth;
2517#endif 3101#endif
3102
3103 return activecnt;
2518} 3104}
2519 3105
2520void 3106void
2521ev_break (EV_P_ int how) 3107ev_break (EV_P_ int how)
2522{ 3108{
… …
2737 3323
2738void noinline 3324void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3325ev_timer_again (EV_P_ ev_timer *w)
2740{ 3326{
2741 EV_FREQUENT_CHECK; 3327 EV_FREQUENT_CHECK;
3328
3329 clear_pending (EV_A_ (W)w);
2742 3330
2743 if (ev_is_active (w)) 3331 if (ev_is_active (w))
2744 { 3332 {
2745 if (w->repeat) 3333 if (w->repeat)
2746 { 3334 {
… …
3063 if (!pend || pend == path) 3651 if (!pend || pend == path)
3064 break; 3652 break;
3065 3653
3066 *pend = 0; 3654 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 3655 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 3656 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3657 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 3658 }
3071 } 3659 }
3072 3660
3073 if (w->wd >= 0) 3661 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3728 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 3729 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 3730 }
3143} 3731}
3144 3732
3145inline_size void 3733inline_size void ecb_cold
3146ev_check_2625 (EV_P) 3734ev_check_2625 (EV_P)
3147{ 3735{
3148 /* kernels < 2.6.25 are borked 3736 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3737 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 3738 */
… …
3155} 3743}
3156 3744
3157inline_size int 3745inline_size int
3158infy_newfd (void) 3746infy_newfd (void)
3159{ 3747{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 3748#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 3749 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 3750 if (fd >= 0)
3163 return fd; 3751 return fd;
3164#endif 3752#endif
3165 return inotify_init (); 3753 return inotify_init ();
… …
3775} 4363}
3776 4364
3777/*****************************************************************************/ 4365/*****************************************************************************/
3778 4366
3779#if EV_WALK_ENABLE 4367#if EV_WALK_ENABLE
3780void 4368void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4369ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3782{ 4370{
3783 int i, j; 4371 int i, j;
3784 ev_watcher_list *wl, *wn; 4372 ev_watcher_list *wl, *wn;
3785 4373
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4417 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4418#endif
3831 4419
3832#if EV_IDLE_ENABLE 4420#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4421 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4422 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4423 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4424 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4425#endif
3838 4426
3839#if EV_FORK_ENABLE 4427#if EV_FORK_ENABLE
… …
3892 4480
3893#if EV_MULTIPLICITY 4481#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4482 #include "ev_wrap.h"
3895#endif 4483#endif
3896 4484
3897EV_CPP(})
3898

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