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Comparing libev/ev.c (file contents):
Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC vs.
Revision 1.421 by root, Wed Apr 18 06:06:04 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 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
376# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
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# ifndef _WIN32 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 401# include <sys/select.h>
383# endif 402# endif
384#endif 403#endif
385 404
386#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
442#else 461#else
443# define EV_FREQUENT_CHECK do { } while (0) 462# define EV_FREQUENT_CHECK do { } while (0)
444#endif 463#endif
445 464
446/* 465/*
447 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 468 */
454#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 */
455 471
456#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) */
457#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) */
458 474
459#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)
460#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)
461 477
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;
462#if __GNUC__ >= 4 519 #if __GNUC__
463# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
464# 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
465#else 526#else
466# define expect(expr,value) (expr) 527 #include <inttypes.h>
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# 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)))
471#endif 542 #endif
543#endif
472 544
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 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
586 #endif
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
600 #elif defined _WIN32
601 #include <WinNT.h>
602 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
603 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
604 #include <mbarrier.h>
605 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
606 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
607 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
608 #elif __xlC__
609 #define ECB_MEMORY_FENCE __sync ()
610 #endif
611#endif
612
613#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS
615 /*
616 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler
619 * OR provide pthread.h and link against the posix thread library
620 * of your system.
621 */
622 #include <pthread.h>
623 #define ECB_NEEDS_PTHREADS 1
624 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
625
626 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
627 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #endif
629#endif
630
631#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
632 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
633#endif
634
635#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif
638
639/*****************************************************************************/
640
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus
644 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__
647#elif ECB_C99
648 #define ecb_inline static inline
649#else
650 #define ecb_inline static
651#endif
652
653#if ECB_GCC_VERSION(3,3)
654 #define ecb_restrict __restrict__
655#elif ECB_C99
656 #define ecb_restrict restrict
657#else
658 #define ecb_restrict
659#endif
660
661typedef int ecb_bool;
662
663#define ECB_CONCAT_(a, b) a ## b
664#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
665#define ECB_STRINGIFY_(a) # a
666#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
667
668#define ecb_function_ ecb_inline
669
670#if ECB_GCC_VERSION(3,1)
671 #define ecb_attribute(attrlist) __attribute__(attrlist)
672 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else
676 #define ecb_attribute(attrlist)
677 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality)
680#endif
681
682/* no emulation for ecb_decltype */
683#if ECB_GCC_VERSION(4,5)
684 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x)
687#endif
688
689#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__))
694
695#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__))
699#else
700 #define ecb_artificial
701 #define ecb_hot
702 #define ecb_cold
703#endif
704
705/* put around conditional expressions if you are very sure that the */
706/* expression is mostly true or mostly false. note that these return */
707/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 708#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 709#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
710/* for compatibility to the rest of the world */
711#define ecb_likely(expr) ecb_expect_true (expr)
712#define ecb_unlikely(expr) ecb_expect_false (expr)
713
714/* count trailing zero bits and count # of one bits */
715#if ECB_GCC_VERSION(3,4)
716 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
717 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
718 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
719 #define ecb_ctz32(x) __builtin_ctz (x)
720 #define ecb_ctz64(x) __builtin_ctzll (x)
721 #define ecb_popcount32(x) __builtin_popcount (x)
722 /* no popcountll */
723#else
724 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz32 (uint32_t x)
727 {
728 int r = 0;
729
730 x &= ~x + 1; /* this isolates the lowest bit */
731
732#if ECB_branchless_on_i386
733 r += !!(x & 0xaaaaaaaa) << 0;
734 r += !!(x & 0xcccccccc) << 1;
735 r += !!(x & 0xf0f0f0f0) << 2;
736 r += !!(x & 0xff00ff00) << 3;
737 r += !!(x & 0xffff0000) << 4;
738#else
739 if (x & 0xaaaaaaaa) r += 1;
740 if (x & 0xcccccccc) r += 2;
741 if (x & 0xf0f0f0f0) r += 4;
742 if (x & 0xff00ff00) r += 8;
743 if (x & 0xffff0000) r += 16;
744#endif
745
746 return r;
747 }
748
749 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
750 ecb_function_ int
751 ecb_ctz64 (uint64_t x)
752 {
753 int shift = x & 0xffffffffU ? 0 : 32;
754 return ecb_ctz32 (x >> shift) + shift;
755 }
756
757 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
758 ecb_function_ int
759 ecb_popcount32 (uint32_t x)
760 {
761 x -= (x >> 1) & 0x55555555;
762 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
763 x = ((x >> 4) + x) & 0x0f0f0f0f;
764 x *= 0x01010101;
765
766 return x >> 24;
767 }
768
769 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
770 ecb_function_ int ecb_ld32 (uint32_t x)
771 {
772 int r = 0;
773
774 if (x >> 16) { x >>= 16; r += 16; }
775 if (x >> 8) { x >>= 8; r += 8; }
776 if (x >> 4) { x >>= 4; r += 4; }
777 if (x >> 2) { x >>= 2; r += 2; }
778 if (x >> 1) { r += 1; }
779
780 return r;
781 }
782
783 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
784 ecb_function_ int ecb_ld64 (uint64_t x)
785 {
786 int r = 0;
787
788 if (x >> 32) { x >>= 32; r += 32; }
789
790 return r + ecb_ld32 (x);
791 }
792#endif
793
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{
797 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
799}
800
801ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
803{
804 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
805 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
806 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
807 x = ( x >> 8 ) | ( x << 8);
808
809 return x;
810}
811
812ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
814{
815 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
816 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
817 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
818 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
819 x = ( x >> 16 ) | ( x << 16);
820
821 return x;
822}
823
824/* popcount64 is only available on 64 bit cpus as gcc builtin */
825/* so for this version we are lazy */
826ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
827ecb_function_ int
828ecb_popcount64 (uint64_t x)
829{
830 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
831}
832
833ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
834ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
841
842ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
843ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
844ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
845ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
846ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
847ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
848ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
849ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
850
851#if ECB_GCC_VERSION(4,3)
852 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
853 #define ecb_bswap32(x) __builtin_bswap32 (x)
854 #define ecb_bswap64(x) __builtin_bswap64 (x)
855#else
856 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
857 ecb_function_ uint16_t
858 ecb_bswap16 (uint16_t x)
859 {
860 return ecb_rotl16 (x, 8);
861 }
862
863 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
864 ecb_function_ uint32_t
865 ecb_bswap32 (uint32_t x)
866 {
867 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
868 }
869
870 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
871 ecb_function_ uint64_t
872 ecb_bswap64 (uint64_t x)
873 {
874 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 }
876#endif
877
878#if ECB_GCC_VERSION(4,5)
879 #define ecb_unreachable() __builtin_unreachable ()
880#else
881 /* this seems to work fine, but gcc always emits a warning for it :/ */
882 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { }
884#endif
885
886/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
888
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char
891ecb_byteorder_helper (void)
892{
893 const uint32_t u = 0x11223344;
894 return *(unsigned char *)&u;
895}
896
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
900ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
901
902#if ECB_GCC_VERSION(3,0) || ECB_C99
903 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
904#else
905 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
906#endif
907
908#if __cplusplus
909 template<typename T>
910 static inline T ecb_div_rd (T val, T div)
911 {
912 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
913 }
914 template<typename T>
915 static inline T ecb_div_ru (T val, T div)
916 {
917 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
918 }
919#else
920 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
921 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
922#endif
923
924#if ecb_cplusplus_does_not_suck
925 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
926 template<typename T, int N>
927 static inline int ecb_array_length (const T (&arr)[N])
928 {
929 return N;
930 }
931#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif
934
935#endif
936
937/* ECB.H END */
938
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
940/* if your architecture doesn't need memory fences, e.g. because it is
941 * single-cpu/core, or if you use libev in a project that doesn't use libev
942 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
943 * libev, in which cases the memory fences become nops.
944 * alternatively, you can remove this #error and link against libpthread,
945 * which will then provide the memory fences.
946 */
947# error "memory fences not defined for your architecture, please report"
948#endif
949
950#ifndef ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE do { } while (0)
952# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
953# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
954#endif
955
956#define expect_false(cond) ecb_expect_false (cond)
957#define expect_true(cond) ecb_expect_true (cond)
958#define noinline ecb_noinline
959
475#define inline_size static inline 960#define inline_size ecb_inline
476 961
477#if EV_FEATURE_CODE 962#if EV_FEATURE_CODE
478# define inline_speed static inline 963# define inline_speed ecb_inline
479#else 964#else
480# define inline_speed static noinline 965# define inline_speed static noinline
481#endif 966#endif
482 967
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 968#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
522# include "ev_win32.c" 1007# include "ev_win32.c"
523#endif 1008#endif
524 1009
525/*****************************************************************************/ 1010/*****************************************************************************/
526 1011
1012/* define a suitable floor function (only used by periodics atm) */
1013
1014#if EV_USE_FLOOR
1015# include <math.h>
1016# define ev_floor(v) floor (v)
1017#else
1018
1019#include <float.h>
1020
1021/* a floor() replacement function, should be independent of ev_tstamp type */
1022static ev_tstamp noinline
1023ev_floor (ev_tstamp v)
1024{
1025 /* the choice of shift factor is not terribly important */
1026#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1028#else
1029 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1030#endif
1031
1032 /* argument too large for an unsigned long? */
1033 if (expect_false (v >= shift))
1034 {
1035 ev_tstamp f;
1036
1037 if (v == v - 1.)
1038 return v; /* very large number */
1039
1040 f = shift * ev_floor (v * (1. / shift));
1041 return f + ev_floor (v - f);
1042 }
1043
1044 /* special treatment for negative args? */
1045 if (expect_false (v < 0.))
1046 {
1047 ev_tstamp f = -ev_floor (-v);
1048
1049 return f - (f == v ? 0 : 1);
1050 }
1051
1052 /* fits into an unsigned long */
1053 return (unsigned long)v;
1054}
1055
1056#endif
1057
1058/*****************************************************************************/
1059
527#ifdef __linux 1060#ifdef __linux
528# include <sys/utsname.h> 1061# include <sys/utsname.h>
529#endif 1062#endif
530 1063
531static unsigned int noinline 1064static unsigned int noinline ecb_cold
532ev_linux_version (void) 1065ev_linux_version (void)
533{ 1066{
534#ifdef __linux 1067#ifdef __linux
535 unsigned int v = 0; 1068 unsigned int v = 0;
536 struct utsname buf; 1069 struct utsname buf;
565} 1098}
566 1099
567/*****************************************************************************/ 1100/*****************************************************************************/
568 1101
569#if EV_AVOID_STDIO 1102#if EV_AVOID_STDIO
570static void noinline 1103static void noinline ecb_cold
571ev_printerr (const char *msg) 1104ev_printerr (const char *msg)
572{ 1105{
573 write (STDERR_FILENO, msg, strlen (msg)); 1106 write (STDERR_FILENO, msg, strlen (msg));
574} 1107}
575#endif 1108#endif
576 1109
577static void (*syserr_cb)(const char *msg); 1110static void (*syserr_cb)(const char *msg) EV_THROW;
578 1111
579void 1112void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
581{ 1114{
582 syserr_cb = cb; 1115 syserr_cb = cb;
583} 1116}
584 1117
585static void noinline 1118static void noinline ecb_cold
586ev_syserr (const char *msg) 1119ev_syserr (const char *msg)
587{ 1120{
588 if (!msg) 1121 if (!msg)
589 msg = "(libev) system error"; 1122 msg = "(libev) system error";
590 1123
591 if (syserr_cb) 1124 if (syserr_cb)
592 syserr_cb (msg); 1125 syserr_cb (msg);
593 else 1126 else
594 { 1127 {
595#if EV_AVOID_STDIO 1128#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 1129 ev_printerr (msg);
599 ev_printerr (": "); 1130 ev_printerr (": ");
600 ev_printerr (err); 1131 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 1132 ev_printerr ("\n");
602#else 1133#else
603 perror (msg); 1134 perror (msg);
604#endif 1135#endif
605 abort (); 1136 abort ();
623 free (ptr); 1154 free (ptr);
624 return 0; 1155 return 0;
625#endif 1156#endif
626} 1157}
627 1158
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
629 1160
630void 1161void ecb_cold
631ev_set_allocator (void *(*cb)(void *ptr, long size)) 1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
632{ 1163{
633 alloc = cb; 1164 alloc = cb;
634} 1165}
635 1166
636inline_speed void * 1167inline_speed void *
639 ptr = alloc (ptr, size); 1170 ptr = alloc (ptr, size);
640 1171
641 if (!ptr && size) 1172 if (!ptr && size)
642 { 1173 {
643#if EV_AVOID_STDIO 1174#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1175 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 1176#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1177 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 1178#endif
648 abort (); 1179 abort ();
649 } 1180 }
650 1181
651 return ptr; 1182 return ptr;
724 #undef VAR 1255 #undef VAR
725 }; 1256 };
726 #include "ev_wrap.h" 1257 #include "ev_wrap.h"
727 1258
728 static struct ev_loop default_loop_struct; 1259 static struct ev_loop default_loop_struct;
729 struct ev_loop *ev_default_loop_ptr; 1260 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
730 1261
731#else 1262#else
732 1263
733 ev_tstamp ev_rt_now; 1264 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
734 #define VAR(name,decl) static decl; 1265 #define VAR(name,decl) static decl;
735 #include "ev_vars.h" 1266 #include "ev_vars.h"
736 #undef VAR 1267 #undef VAR
737 1268
738 static int ev_default_loop_ptr; 1269 static int ev_default_loop_ptr;
753 1284
754/*****************************************************************************/ 1285/*****************************************************************************/
755 1286
756#ifndef EV_HAVE_EV_TIME 1287#ifndef EV_HAVE_EV_TIME
757ev_tstamp 1288ev_tstamp
758ev_time (void) 1289ev_time (void) EV_THROW
759{ 1290{
760#if EV_USE_REALTIME 1291#if EV_USE_REALTIME
761 if (expect_true (have_realtime)) 1292 if (expect_true (have_realtime))
762 { 1293 {
763 struct timespec ts; 1294 struct timespec ts;
787 return ev_time (); 1318 return ev_time ();
788} 1319}
789 1320
790#if EV_MULTIPLICITY 1321#if EV_MULTIPLICITY
791ev_tstamp 1322ev_tstamp
792ev_now (EV_P) 1323ev_now (EV_P) EV_THROW
793{ 1324{
794 return ev_rt_now; 1325 return ev_rt_now;
795} 1326}
796#endif 1327#endif
797 1328
798void 1329void
799ev_sleep (ev_tstamp delay) 1330ev_sleep (ev_tstamp delay) EV_THROW
800{ 1331{
801 if (delay > 0.) 1332 if (delay > 0.)
802 { 1333 {
803#if EV_USE_NANOSLEEP 1334#if EV_USE_NANOSLEEP
804 struct timespec ts; 1335 struct timespec ts;
805 1336
806 EV_TS_SET (ts, delay); 1337 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0); 1338 nanosleep (&ts, 0);
808#elif defined(_WIN32) 1339#elif defined _WIN32
809 Sleep ((unsigned long)(delay * 1e3)); 1340 Sleep ((unsigned long)(delay * 1e3));
810#else 1341#else
811 struct timeval tv; 1342 struct timeval tv;
812 1343
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1344 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
832 1363
833 do 1364 do
834 ncur <<= 1; 1365 ncur <<= 1;
835 while (cnt > ncur); 1366 while (cnt > ncur);
836 1367
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1368 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1369 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 { 1370 {
840 ncur *= elem; 1371 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1372 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4; 1373 ncur = ncur - sizeof (void *) * 4;
844 } 1375 }
845 1376
846 return ncur; 1377 return ncur;
847} 1378}
848 1379
849static noinline void * 1380static void * noinline ecb_cold
850array_realloc (int elem, void *base, int *cur, int cnt) 1381array_realloc (int elem, void *base, int *cur, int cnt)
851{ 1382{
852 *cur = array_nextsize (elem, *cur, cnt); 1383 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur); 1384 return ev_realloc (base, elem * *cur);
854} 1385}
857 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1388 memset ((void *)(base), 0, sizeof (*(base)) * (count))
858 1389
859#define array_needsize(type,base,cur,cnt,init) \ 1390#define array_needsize(type,base,cur,cnt,init) \
860 if (expect_false ((cnt) > (cur))) \ 1391 if (expect_false ((cnt) > (cur))) \
861 { \ 1392 { \
862 int ocur_ = (cur); \ 1393 int ecb_unused ocur_ = (cur); \
863 (base) = (type *)array_realloc \ 1394 (base) = (type *)array_realloc \
864 (sizeof (type), (base), &(cur), (cnt)); \ 1395 (sizeof (type), (base), &(cur), (cnt)); \
865 init ((base) + (ocur_), (cur) - ocur_); \ 1396 init ((base) + (ocur_), (cur) - ocur_); \
866 } 1397 }
867 1398
885pendingcb (EV_P_ ev_prepare *w, int revents) 1416pendingcb (EV_P_ ev_prepare *w, int revents)
886{ 1417{
887} 1418}
888 1419
889void noinline 1420void noinline
890ev_feed_event (EV_P_ void *w, int revents) 1421ev_feed_event (EV_P_ void *w, int revents) EV_THROW
891{ 1422{
892 W w_ = (W)w; 1423 W w_ = (W)w;
893 int pri = ABSPRI (w_); 1424 int pri = ABSPRI (w_);
894 1425
895 if (expect_false (w_->pending)) 1426 if (expect_false (w_->pending))
954 if (expect_true (!anfd->reify)) 1485 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents); 1486 fd_event_nocheck (EV_A_ fd, revents);
956} 1487}
957 1488
958void 1489void
959ev_feed_fd_event (EV_P_ int fd, int revents) 1490ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
960{ 1491{
961 if (fd >= 0 && fd < anfdmax) 1492 if (fd >= 0 && fd < anfdmax)
962 fd_event_nocheck (EV_A_ fd, revents); 1493 fd_event_nocheck (EV_A_ fd, revents);
963} 1494}
964 1495
967inline_size void 1498inline_size void
968fd_reify (EV_P) 1499fd_reify (EV_P)
969{ 1500{
970 int i; 1501 int i;
971 1502
1503#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1504 for (i = 0; i < fdchangecnt; ++i)
1505 {
1506 int fd = fdchanges [i];
1507 ANFD *anfd = anfds + fd;
1508
1509 if (anfd->reify & EV__IOFDSET && anfd->head)
1510 {
1511 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1512
1513 if (handle != anfd->handle)
1514 {
1515 unsigned long arg;
1516
1517 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1518
1519 /* handle changed, but fd didn't - we need to do it in two steps */
1520 backend_modify (EV_A_ fd, anfd->events, 0);
1521 anfd->events = 0;
1522 anfd->handle = handle;
1523 }
1524 }
1525 }
1526#endif
1527
972 for (i = 0; i < fdchangecnt; ++i) 1528 for (i = 0; i < fdchangecnt; ++i)
973 { 1529 {
974 int fd = fdchanges [i]; 1530 int fd = fdchanges [i];
975 ANFD *anfd = anfds + fd; 1531 ANFD *anfd = anfds + fd;
976 ev_io *w; 1532 ev_io *w;
978 unsigned char o_events = anfd->events; 1534 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify; 1535 unsigned char o_reify = anfd->reify;
980 1536
981 anfd->reify = 0; 1537 anfd->reify = 0;
982 1538
983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1539 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 { 1540 {
995 anfd->events = 0; 1541 anfd->events = 0;
996 1542
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1543 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1022 fdchanges [fdchangecnt - 1] = fd; 1568 fdchanges [fdchangecnt - 1] = fd;
1023 } 1569 }
1024} 1570}
1025 1571
1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1572/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void 1573inline_speed void ecb_cold
1028fd_kill (EV_P_ int fd) 1574fd_kill (EV_P_ int fd)
1029{ 1575{
1030 ev_io *w; 1576 ev_io *w;
1031 1577
1032 while ((w = (ev_io *)anfds [fd].head)) 1578 while ((w = (ev_io *)anfds [fd].head))
1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1581 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1036 } 1582 }
1037} 1583}
1038 1584
1039/* check whether the given fd is actually valid, for error recovery */ 1585/* check whether the given fd is actually valid, for error recovery */
1040inline_size int 1586inline_size int ecb_cold
1041fd_valid (int fd) 1587fd_valid (int fd)
1042{ 1588{
1043#ifdef _WIN32 1589#ifdef _WIN32
1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1590 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045#else 1591#else
1046 return fcntl (fd, F_GETFD) != -1; 1592 return fcntl (fd, F_GETFD) != -1;
1047#endif 1593#endif
1048} 1594}
1049 1595
1050/* called on EBADF to verify fds */ 1596/* called on EBADF to verify fds */
1051static void noinline 1597static void noinline ecb_cold
1052fd_ebadf (EV_P) 1598fd_ebadf (EV_P)
1053{ 1599{
1054 int fd; 1600 int fd;
1055 1601
1056 for (fd = 0; fd < anfdmax; ++fd) 1602 for (fd = 0; fd < anfdmax; ++fd)
1058 if (!fd_valid (fd) && errno == EBADF) 1604 if (!fd_valid (fd) && errno == EBADF)
1059 fd_kill (EV_A_ fd); 1605 fd_kill (EV_A_ fd);
1060} 1606}
1061 1607
1062/* called on ENOMEM in select/poll to kill some fds and retry */ 1608/* called on ENOMEM in select/poll to kill some fds and retry */
1063static void noinline 1609static void noinline ecb_cold
1064fd_enomem (EV_P) 1610fd_enomem (EV_P)
1065{ 1611{
1066 int fd; 1612 int fd;
1067 1613
1068 for (fd = anfdmax; fd--; ) 1614 for (fd = anfdmax; fd--; )
1263 1809
1264/*****************************************************************************/ 1810/*****************************************************************************/
1265 1811
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1812#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267 1813
1268static void noinline 1814static void noinline ecb_cold
1269evpipe_init (EV_P) 1815evpipe_init (EV_P)
1270{ 1816{
1271 if (!ev_is_active (&pipe_w)) 1817 if (!ev_is_active (&pipe_w))
1272 { 1818 {
1273# if EV_USE_EVENTFD 1819# if EV_USE_EVENTFD
1295 ev_io_start (EV_A_ &pipe_w); 1841 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */ 1842 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 } 1843 }
1298} 1844}
1299 1845
1300inline_size void 1846inline_speed void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1847evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{ 1848{
1303 if (!*flag) 1849 if (expect_true (*flag))
1850 return;
1851
1852 *flag = 1;
1853
1854 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1855
1856 pipe_write_skipped = 1;
1857
1858 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1859
1860 if (pipe_write_wanted)
1304 { 1861 {
1862 int old_errno;
1863
1864 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1865
1305 int old_errno = errno; /* save errno because write might clobber it */ 1866 old_errno = errno; /* save errno because write will clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309 1867
1310#if EV_USE_EVENTFD 1868#if EV_USE_EVENTFD
1311 if (evfd >= 0) 1869 if (evfd >= 0)
1312 { 1870 {
1313 uint64_t counter = 1; 1871 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t)); 1872 write (evfd, &counter, sizeof (uint64_t));
1315 } 1873 }
1316 else 1874 else
1317#endif 1875#endif
1876 {
1318 /* win32 people keep sending patches that change this write() to send() */ 1877 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */ 1878 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */ 1879 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */ 1880 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */ 1881 /* tell me. thank you. */
1882 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1883 /* check the ev documentation on how to use this flag */
1323 write (evpipe [1], &dummy, 1); 1884 write (evpipe [1], &(evpipe [1]), 1);
1885 }
1324 1886
1325 errno = old_errno; 1887 errno = old_errno;
1326 } 1888 }
1327} 1889}
1328 1890
1331static void 1893static void
1332pipecb (EV_P_ ev_io *iow, int revents) 1894pipecb (EV_P_ ev_io *iow, int revents)
1333{ 1895{
1334 int i; 1896 int i;
1335 1897
1898 if (revents & EV_READ)
1899 {
1336#if EV_USE_EVENTFD 1900#if EV_USE_EVENTFD
1337 if (evfd >= 0) 1901 if (evfd >= 0)
1338 { 1902 {
1339 uint64_t counter; 1903 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t)); 1904 read (evfd, &counter, sizeof (uint64_t));
1341 } 1905 }
1342 else 1906 else
1343#endif 1907#endif
1344 { 1908 {
1345 char dummy; 1909 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1910 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1); 1911 read (evpipe [0], &dummy, 1);
1912 }
1348 } 1913 }
1349 1914
1915 pipe_write_skipped = 0;
1916
1917#if EV_SIGNAL_ENABLE
1350 if (sig_pending) 1918 if (sig_pending)
1351 { 1919 {
1352 sig_pending = 0; 1920 sig_pending = 0;
1353 1921
1354 for (i = EV_NSIG - 1; i--; ) 1922 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending)) 1923 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1); 1924 ev_feed_signal_event (EV_A_ i + 1);
1357 } 1925 }
1926#endif
1358 1927
1359#if EV_ASYNC_ENABLE 1928#if EV_ASYNC_ENABLE
1360 if (async_pending) 1929 if (async_pending)
1361 { 1930 {
1362 async_pending = 0; 1931 async_pending = 0;
1371#endif 1940#endif
1372} 1941}
1373 1942
1374/*****************************************************************************/ 1943/*****************************************************************************/
1375 1944
1945void
1946ev_feed_signal (int signum) EV_THROW
1947{
1948#if EV_MULTIPLICITY
1949 EV_P = signals [signum - 1].loop;
1950
1951 if (!EV_A)
1952 return;
1953#endif
1954
1955 if (!ev_active (&pipe_w))
1956 return;
1957
1958 signals [signum - 1].pending = 1;
1959 evpipe_write (EV_A_ &sig_pending);
1960}
1961
1376static void 1962static void
1377ev_sighandler (int signum) 1963ev_sighandler (int signum)
1378{ 1964{
1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
1382
1383#ifdef _WIN32 1965#ifdef _WIN32
1384 signal (signum, ev_sighandler); 1966 signal (signum, ev_sighandler);
1385#endif 1967#endif
1386 1968
1387 signals [signum - 1].pending = 1; 1969 ev_feed_signal (signum);
1388 evpipe_write (EV_A_ &sig_pending);
1389} 1970}
1390 1971
1391void noinline 1972void noinline
1392ev_feed_signal_event (EV_P_ int signum) 1973ev_feed_signal_event (EV_P_ int signum) EV_THROW
1393{ 1974{
1394 WL w; 1975 WL w;
1395 1976
1396 if (expect_false (signum <= 0 || signum > EV_NSIG)) 1977 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return; 1978 return;
1512#endif 2093#endif
1513#if EV_USE_SELECT 2094#if EV_USE_SELECT
1514# include "ev_select.c" 2095# include "ev_select.c"
1515#endif 2096#endif
1516 2097
1517int 2098int ecb_cold
1518ev_version_major (void) 2099ev_version_major (void) EV_THROW
1519{ 2100{
1520 return EV_VERSION_MAJOR; 2101 return EV_VERSION_MAJOR;
1521} 2102}
1522 2103
1523int 2104int ecb_cold
1524ev_version_minor (void) 2105ev_version_minor (void) EV_THROW
1525{ 2106{
1526 return EV_VERSION_MINOR; 2107 return EV_VERSION_MINOR;
1527} 2108}
1528 2109
1529/* return true if we are running with elevated privileges and should ignore env variables */ 2110/* return true if we are running with elevated privileges and should ignore env variables */
1530int inline_size 2111int inline_size ecb_cold
1531enable_secure (void) 2112enable_secure (void)
1532{ 2113{
1533#ifdef _WIN32 2114#ifdef _WIN32
1534 return 0; 2115 return 0;
1535#else 2116#else
1536 return getuid () != geteuid () 2117 return getuid () != geteuid ()
1537 || getgid () != getegid (); 2118 || getgid () != getegid ();
1538#endif 2119#endif
1539} 2120}
1540 2121
1541unsigned int 2122unsigned int ecb_cold
1542ev_supported_backends (void) 2123ev_supported_backends (void) EV_THROW
1543{ 2124{
1544 unsigned int flags = 0; 2125 unsigned int flags = 0;
1545 2126
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2127 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2128 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2131 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551 2132
1552 return flags; 2133 return flags;
1553} 2134}
1554 2135
1555unsigned int 2136unsigned int ecb_cold
1556ev_recommended_backends (void) 2137ev_recommended_backends (void) EV_THROW
1557{ 2138{
1558 unsigned int flags = ev_supported_backends (); 2139 unsigned int flags = ev_supported_backends ();
1559 2140
1560#ifndef __NetBSD__ 2141#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */ 2142 /* kqueue is borked on everything but netbsd apparently */
1572#endif 2153#endif
1573 2154
1574 return flags; 2155 return flags;
1575} 2156}
1576 2157
1577unsigned int 2158unsigned int ecb_cold
1578ev_embeddable_backends (void) 2159ev_embeddable_backends (void) EV_THROW
1579{ 2160{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2161 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581 2162
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2163 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2164 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1585 2166
1586 return flags; 2167 return flags;
1587} 2168}
1588 2169
1589unsigned int 2170unsigned int
1590ev_backend (EV_P) 2171ev_backend (EV_P) EV_THROW
1591{ 2172{
1592 return backend; 2173 return backend;
1593} 2174}
1594 2175
1595#if EV_FEATURE_API 2176#if EV_FEATURE_API
1596unsigned int 2177unsigned int
1597ev_iteration (EV_P) 2178ev_iteration (EV_P) EV_THROW
1598{ 2179{
1599 return loop_count; 2180 return loop_count;
1600} 2181}
1601 2182
1602unsigned int 2183unsigned int
1603ev_depth (EV_P) 2184ev_depth (EV_P) EV_THROW
1604{ 2185{
1605 return loop_depth; 2186 return loop_depth;
1606} 2187}
1607 2188
1608void 2189void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2190ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1610{ 2191{
1611 io_blocktime = interval; 2192 io_blocktime = interval;
1612} 2193}
1613 2194
1614void 2195void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2196ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1616{ 2197{
1617 timeout_blocktime = interval; 2198 timeout_blocktime = interval;
1618} 2199}
1619 2200
1620void 2201void
1621ev_set_userdata (EV_P_ void *data) 2202ev_set_userdata (EV_P_ void *data) EV_THROW
1622{ 2203{
1623 userdata = data; 2204 userdata = data;
1624} 2205}
1625 2206
1626void * 2207void *
1627ev_userdata (EV_P) 2208ev_userdata (EV_P) EV_THROW
1628{ 2209{
1629 return userdata; 2210 return userdata;
1630} 2211}
1631 2212
2213void
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2214ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1633{ 2215{
1634 invoke_cb = invoke_pending_cb; 2216 invoke_cb = invoke_pending_cb;
1635} 2217}
1636 2218
2219void
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2220ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1638{ 2221{
1639 release_cb = release; 2222 release_cb = release;
1640 acquire_cb = acquire; 2223 acquire_cb = acquire;
1641} 2224}
1642#endif 2225#endif
1643 2226
1644/* initialise a loop structure, must be zero-initialised */ 2227/* initialise a loop structure, must be zero-initialised */
1645static void noinline 2228static void noinline ecb_cold
1646loop_init (EV_P_ unsigned int flags) 2229loop_init (EV_P_ unsigned int flags) EV_THROW
1647{ 2230{
1648 if (!backend) 2231 if (!backend)
1649 { 2232 {
2233 origflags = flags;
2234
1650#if EV_USE_REALTIME 2235#if EV_USE_REALTIME
1651 if (!have_realtime) 2236 if (!have_realtime)
1652 { 2237 {
1653 struct timespec ts; 2238 struct timespec ts;
1654 2239
1676 if (!(flags & EVFLAG_NOENV) 2261 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure () 2262 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS")) 2263 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS")); 2264 flags = atoi (getenv ("LIBEV_FLAGS"));
1680 2265
1681 ev_rt_now = ev_time (); 2266 ev_rt_now = ev_time ();
1682 mn_now = get_clock (); 2267 mn_now = get_clock ();
1683 now_floor = mn_now; 2268 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now; 2269 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API 2270#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending; 2271 invoke_cb = ev_invoke_pending;
1687#endif 2272#endif
1688 2273
1689 io_blocktime = 0.; 2274 io_blocktime = 0.;
1690 timeout_blocktime = 0.; 2275 timeout_blocktime = 0.;
1691 backend = 0; 2276 backend = 0;
1692 backend_fd = -1; 2277 backend_fd = -1;
1693 sig_pending = 0; 2278 sig_pending = 0;
1694#if EV_ASYNC_ENABLE 2279#if EV_ASYNC_ENABLE
1695 async_pending = 0; 2280 async_pending = 0;
1696#endif 2281#endif
2282 pipe_write_skipped = 0;
2283 pipe_write_wanted = 0;
1697#if EV_USE_INOTIFY 2284#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2285 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif 2286#endif
1700#if EV_USE_SIGNALFD 2287#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2288 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif 2289#endif
1703 2290
1704 if (!(flags & 0x0000ffffU)) 2291 if (!(flags & EVBACKEND_MASK))
1705 flags |= ev_recommended_backends (); 2292 flags |= ev_recommended_backends ();
1706 2293
1707#if EV_USE_IOCP 2294#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 2295 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif 2296#endif
1731#endif 2318#endif
1732 } 2319 }
1733} 2320}
1734 2321
1735/* free up a loop structure */ 2322/* free up a loop structure */
1736void 2323void ecb_cold
1737ev_loop_destroy (EV_P) 2324ev_loop_destroy (EV_P) EV_THROW
1738{ 2325{
1739 int i; 2326 int i;
2327
2328#if EV_MULTIPLICITY
2329 /* mimic free (0) */
2330 if (!EV_A)
2331 return;
2332#endif
1740 2333
1741#if EV_CLEANUP_ENABLE 2334#if EV_CLEANUP_ENABLE
1742 /* queue cleanup watchers (and execute them) */ 2335 /* queue cleanup watchers (and execute them) */
1743 if (expect_false (cleanupcnt)) 2336 if (expect_false (cleanupcnt))
1744 { 2337 {
1865 infy_fork (EV_A); 2458 infy_fork (EV_A);
1866#endif 2459#endif
1867 2460
1868 if (ev_is_active (&pipe_w)) 2461 if (ev_is_active (&pipe_w))
1869 { 2462 {
1870 /* this "locks" the handlers against writing to the pipe */ 2463 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1871 /* while we modify the fd vars */
1872 sig_pending = 1;
1873#if EV_ASYNC_ENABLE
1874 async_pending = 1;
1875#endif
1876 2464
1877 ev_ref (EV_A); 2465 ev_ref (EV_A);
1878 ev_io_stop (EV_A_ &pipe_w); 2466 ev_io_stop (EV_A_ &pipe_w);
1879 2467
1880#if EV_USE_EVENTFD 2468#if EV_USE_EVENTFD
1898 postfork = 0; 2486 postfork = 0;
1899} 2487}
1900 2488
1901#if EV_MULTIPLICITY 2489#if EV_MULTIPLICITY
1902 2490
1903struct ev_loop * 2491struct ev_loop * ecb_cold
1904ev_loop_new (unsigned int flags) 2492ev_loop_new (unsigned int flags) EV_THROW
1905{ 2493{
1906 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2494 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1907 2495
1908 memset (EV_A, 0, sizeof (struct ev_loop)); 2496 memset (EV_A, 0, sizeof (struct ev_loop));
1909 loop_init (EV_A_ flags); 2497 loop_init (EV_A_ flags);
1916} 2504}
1917 2505
1918#endif /* multiplicity */ 2506#endif /* multiplicity */
1919 2507
1920#if EV_VERIFY 2508#if EV_VERIFY
1921static void noinline 2509static void noinline ecb_cold
1922verify_watcher (EV_P_ W w) 2510verify_watcher (EV_P_ W w)
1923{ 2511{
1924 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2512 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1925 2513
1926 if (w->pending) 2514 if (w->pending)
1927 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2515 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1928} 2516}
1929 2517
1930static void noinline 2518static void noinline ecb_cold
1931verify_heap (EV_P_ ANHE *heap, int N) 2519verify_heap (EV_P_ ANHE *heap, int N)
1932{ 2520{
1933 int i; 2521 int i;
1934 2522
1935 for (i = HEAP0; i < N + HEAP0; ++i) 2523 for (i = HEAP0; i < N + HEAP0; ++i)
1940 2528
1941 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2529 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1942 } 2530 }
1943} 2531}
1944 2532
1945static void noinline 2533static void noinline ecb_cold
1946array_verify (EV_P_ W *ws, int cnt) 2534array_verify (EV_P_ W *ws, int cnt)
1947{ 2535{
1948 while (cnt--) 2536 while (cnt--)
1949 { 2537 {
1950 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2538 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1952 } 2540 }
1953} 2541}
1954#endif 2542#endif
1955 2543
1956#if EV_FEATURE_API 2544#if EV_FEATURE_API
1957void 2545void ecb_cold
1958ev_verify (EV_P) 2546ev_verify (EV_P) EV_THROW
1959{ 2547{
1960#if EV_VERIFY 2548#if EV_VERIFY
1961 int i; 2549 int i;
1962 WL w; 2550 WL w;
1963 2551
2028#endif 2616#endif
2029} 2617}
2030#endif 2618#endif
2031 2619
2032#if EV_MULTIPLICITY 2620#if EV_MULTIPLICITY
2033struct ev_loop * 2621struct ev_loop * ecb_cold
2034#else 2622#else
2035int 2623int
2036#endif 2624#endif
2037ev_default_loop (unsigned int flags) 2625ev_default_loop (unsigned int flags) EV_THROW
2038{ 2626{
2039 if (!ev_default_loop_ptr) 2627 if (!ev_default_loop_ptr)
2040 { 2628 {
2041#if EV_MULTIPLICITY 2629#if EV_MULTIPLICITY
2042 EV_P = ev_default_loop_ptr = &default_loop_struct; 2630 EV_P = ev_default_loop_ptr = &default_loop_struct;
2061 2649
2062 return ev_default_loop_ptr; 2650 return ev_default_loop_ptr;
2063} 2651}
2064 2652
2065void 2653void
2066ev_loop_fork (EV_P) 2654ev_loop_fork (EV_P) EV_THROW
2067{ 2655{
2068 postfork = 1; /* must be in line with ev_default_fork */ 2656 postfork = 1; /* must be in line with ev_default_fork */
2069} 2657}
2070 2658
2071/*****************************************************************************/ 2659/*****************************************************************************/
2075{ 2663{
2076 EV_CB_INVOKE ((W)w, revents); 2664 EV_CB_INVOKE ((W)w, revents);
2077} 2665}
2078 2666
2079unsigned int 2667unsigned int
2080ev_pending_count (EV_P) 2668ev_pending_count (EV_P) EV_THROW
2081{ 2669{
2082 int pri; 2670 int pri;
2083 unsigned int count = 0; 2671 unsigned int count = 0;
2084 2672
2085 for (pri = NUMPRI; pri--; ) 2673 for (pri = NUMPRI; pri--; )
2095 2683
2096 for (pri = NUMPRI; pri--; ) 2684 for (pri = NUMPRI; pri--; )
2097 while (pendingcnt [pri]) 2685 while (pendingcnt [pri])
2098 { 2686 {
2099 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2687 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2100
2101 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2102 /* ^ this is no longer true, as pending_w could be here */
2103 2688
2104 p->w->pending = 0; 2689 p->w->pending = 0;
2105 EV_CB_INVOKE (p->w, p->events); 2690 EV_CB_INVOKE (p->w, p->events);
2106 EV_FREQUENT_CHECK; 2691 EV_FREQUENT_CHECK;
2107 } 2692 }
2169 feed_reverse_done (EV_A_ EV_TIMER); 2754 feed_reverse_done (EV_A_ EV_TIMER);
2170 } 2755 }
2171} 2756}
2172 2757
2173#if EV_PERIODIC_ENABLE 2758#if EV_PERIODIC_ENABLE
2759
2760static void noinline
2761periodic_recalc (EV_P_ ev_periodic *w)
2762{
2763 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2764 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2765
2766 /* the above almost always errs on the low side */
2767 while (at <= ev_rt_now)
2768 {
2769 ev_tstamp nat = at + w->interval;
2770
2771 /* when resolution fails us, we use ev_rt_now */
2772 if (expect_false (nat == at))
2773 {
2774 at = ev_rt_now;
2775 break;
2776 }
2777
2778 at = nat;
2779 }
2780
2781 ev_at (w) = at;
2782}
2783
2174/* make periodics pending */ 2784/* make periodics pending */
2175inline_size void 2785inline_size void
2176periodics_reify (EV_P) 2786periodics_reify (EV_P)
2177{ 2787{
2178 EV_FREQUENT_CHECK; 2788 EV_FREQUENT_CHECK;
2197 ANHE_at_cache (periodics [HEAP0]); 2807 ANHE_at_cache (periodics [HEAP0]);
2198 downheap (periodics, periodiccnt, HEAP0); 2808 downheap (periodics, periodiccnt, HEAP0);
2199 } 2809 }
2200 else if (w->interval) 2810 else if (w->interval)
2201 { 2811 {
2202 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2812 periodic_recalc (EV_A_ w);
2203 /* if next trigger time is not sufficiently in the future, put it there */
2204 /* this might happen because of floating point inexactness */
2205 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2206 {
2207 ev_at (w) += w->interval;
2208
2209 /* if interval is unreasonably low we might still have a time in the past */
2210 /* so correct this. this will make the periodic very inexact, but the user */
2211 /* has effectively asked to get triggered more often than possible */
2212 if (ev_at (w) < ev_rt_now)
2213 ev_at (w) = ev_rt_now;
2214 }
2215
2216 ANHE_at_cache (periodics [HEAP0]); 2813 ANHE_at_cache (periodics [HEAP0]);
2217 downheap (periodics, periodiccnt, HEAP0); 2814 downheap (periodics, periodiccnt, HEAP0);
2218 } 2815 }
2219 else 2816 else
2220 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2817 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2228 } 2825 }
2229} 2826}
2230 2827
2231/* simply recalculate all periodics */ 2828/* simply recalculate all periodics */
2232/* TODO: maybe ensure that at least one event happens when jumping forward? */ 2829/* TODO: maybe ensure that at least one event happens when jumping forward? */
2233static void noinline 2830static void noinline ecb_cold
2234periodics_reschedule (EV_P) 2831periodics_reschedule (EV_P)
2235{ 2832{
2236 int i; 2833 int i;
2237 2834
2238 /* adjust periodics after time jump */ 2835 /* adjust periodics after time jump */
2241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2838 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2242 2839
2243 if (w->reschedule_cb) 2840 if (w->reschedule_cb)
2244 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2245 else if (w->interval) 2842 else if (w->interval)
2246 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2843 periodic_recalc (EV_A_ w);
2247 2844
2248 ANHE_at_cache (periodics [i]); 2845 ANHE_at_cache (periodics [i]);
2249 } 2846 }
2250 2847
2251 reheap (periodics, periodiccnt); 2848 reheap (periodics, periodiccnt);
2252} 2849}
2253#endif 2850#endif
2254 2851
2255/* adjust all timers by a given offset */ 2852/* adjust all timers by a given offset */
2256static void noinline 2853static void noinline ecb_cold
2257timers_reschedule (EV_P_ ev_tstamp adjust) 2854timers_reschedule (EV_P_ ev_tstamp adjust)
2258{ 2855{
2259 int i; 2856 int i;
2260 2857
2261 for (i = 0; i < timercnt; ++i) 2858 for (i = 0; i < timercnt; ++i)
2298 * doesn't hurt either as we only do this on time-jumps or 2895 * doesn't hurt either as we only do this on time-jumps or
2299 * in the unlikely event of having been preempted here. 2896 * in the unlikely event of having been preempted here.
2300 */ 2897 */
2301 for (i = 4; --i; ) 2898 for (i = 4; --i; )
2302 { 2899 {
2900 ev_tstamp diff;
2303 rtmn_diff = ev_rt_now - mn_now; 2901 rtmn_diff = ev_rt_now - mn_now;
2304 2902
2903 diff = odiff - rtmn_diff;
2904
2305 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2905 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2306 return; /* all is well */ 2906 return; /* all is well */
2307 2907
2308 ev_rt_now = ev_time (); 2908 ev_rt_now = ev_time ();
2309 mn_now = get_clock (); 2909 mn_now = get_clock ();
2310 now_floor = mn_now; 2910 now_floor = mn_now;
2332 2932
2333 mn_now = ev_rt_now; 2933 mn_now = ev_rt_now;
2334 } 2934 }
2335} 2935}
2336 2936
2337void 2937int
2338ev_run (EV_P_ int flags) 2938ev_run (EV_P_ int flags)
2339{ 2939{
2340#if EV_FEATURE_API 2940#if EV_FEATURE_API
2341 ++loop_depth; 2941 ++loop_depth;
2342#endif 2942#endif
2400 ev_tstamp prev_mn_now = mn_now; 3000 ev_tstamp prev_mn_now = mn_now;
2401 3001
2402 /* update time to cancel out callback processing overhead */ 3002 /* update time to cancel out callback processing overhead */
2403 time_update (EV_A_ 1e100); 3003 time_update (EV_A_ 1e100);
2404 3004
3005 /* from now on, we want a pipe-wake-up */
3006 pipe_write_wanted = 1;
3007
3008 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3009
2405 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3010 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2406 { 3011 {
2407 waittime = MAX_BLOCKTIME; 3012 waittime = MAX_BLOCKTIME;
2408 3013
2409 if (timercnt) 3014 if (timercnt)
2410 { 3015 {
2411 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3016 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2412 if (waittime > to) waittime = to; 3017 if (waittime > to) waittime = to;
2413 } 3018 }
2414 3019
2415#if EV_PERIODIC_ENABLE 3020#if EV_PERIODIC_ENABLE
2416 if (periodiccnt) 3021 if (periodiccnt)
2417 { 3022 {
2418 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3023 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2419 if (waittime > to) waittime = to; 3024 if (waittime > to) waittime = to;
2420 } 3025 }
2421#endif 3026#endif
2422 3027
2423 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3028 /* don't let timeouts decrease the waittime below timeout_blocktime */
2424 if (expect_false (waittime < timeout_blocktime)) 3029 if (expect_false (waittime < timeout_blocktime))
2425 waittime = timeout_blocktime; 3030 waittime = timeout_blocktime;
3031
3032 /* at this point, we NEED to wait, so we have to ensure */
3033 /* to pass a minimum nonzero value to the backend */
3034 if (expect_false (waittime < backend_mintime))
3035 waittime = backend_mintime;
2426 3036
2427 /* extra check because io_blocktime is commonly 0 */ 3037 /* extra check because io_blocktime is commonly 0 */
2428 if (expect_false (io_blocktime)) 3038 if (expect_false (io_blocktime))
2429 { 3039 {
2430 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3040 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2431 3041
2432 if (sleeptime > waittime - backend_fudge) 3042 if (sleeptime > waittime - backend_mintime)
2433 sleeptime = waittime - backend_fudge; 3043 sleeptime = waittime - backend_mintime;
2434 3044
2435 if (expect_true (sleeptime > 0.)) 3045 if (expect_true (sleeptime > 0.))
2436 { 3046 {
2437 ev_sleep (sleeptime); 3047 ev_sleep (sleeptime);
2438 waittime -= sleeptime; 3048 waittime -= sleeptime;
2445#endif 3055#endif
2446 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3056 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2447 backend_poll (EV_A_ waittime); 3057 backend_poll (EV_A_ waittime);
2448 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3058 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2449 3059
3060 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3061
3062 if (pipe_write_skipped)
3063 {
3064 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3065 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3066 }
3067
3068
2450 /* update ev_rt_now, do magic */ 3069 /* update ev_rt_now, do magic */
2451 time_update (EV_A_ waittime + sleeptime); 3070 time_update (EV_A_ waittime + sleeptime);
2452 } 3071 }
2453 3072
2454 /* queue pending timers and reschedule them */ 3073 /* queue pending timers and reschedule them */
2480 loop_done = EVBREAK_CANCEL; 3099 loop_done = EVBREAK_CANCEL;
2481 3100
2482#if EV_FEATURE_API 3101#if EV_FEATURE_API
2483 --loop_depth; 3102 --loop_depth;
2484#endif 3103#endif
3104
3105 return activecnt;
2485} 3106}
2486 3107
2487void 3108void
2488ev_break (EV_P_ int how) 3109ev_break (EV_P_ int how) EV_THROW
2489{ 3110{
2490 loop_done = how; 3111 loop_done = how;
2491} 3112}
2492 3113
2493void 3114void
2494ev_ref (EV_P) 3115ev_ref (EV_P) EV_THROW
2495{ 3116{
2496 ++activecnt; 3117 ++activecnt;
2497} 3118}
2498 3119
2499void 3120void
2500ev_unref (EV_P) 3121ev_unref (EV_P) EV_THROW
2501{ 3122{
2502 --activecnt; 3123 --activecnt;
2503} 3124}
2504 3125
2505void 3126void
2506ev_now_update (EV_P) 3127ev_now_update (EV_P) EV_THROW
2507{ 3128{
2508 time_update (EV_A_ 1e100); 3129 time_update (EV_A_ 1e100);
2509} 3130}
2510 3131
2511void 3132void
2512ev_suspend (EV_P) 3133ev_suspend (EV_P) EV_THROW
2513{ 3134{
2514 ev_now_update (EV_A); 3135 ev_now_update (EV_A);
2515} 3136}
2516 3137
2517void 3138void
2518ev_resume (EV_P) 3139ev_resume (EV_P) EV_THROW
2519{ 3140{
2520 ev_tstamp mn_prev = mn_now; 3141 ev_tstamp mn_prev = mn_now;
2521 3142
2522 ev_now_update (EV_A); 3143 ev_now_update (EV_A);
2523 timers_reschedule (EV_A_ mn_now - mn_prev); 3144 timers_reschedule (EV_A_ mn_now - mn_prev);
2562 w->pending = 0; 3183 w->pending = 0;
2563 } 3184 }
2564} 3185}
2565 3186
2566int 3187int
2567ev_clear_pending (EV_P_ void *w) 3188ev_clear_pending (EV_P_ void *w) EV_THROW
2568{ 3189{
2569 W w_ = (W)w; 3190 W w_ = (W)w;
2570 int pending = w_->pending; 3191 int pending = w_->pending;
2571 3192
2572 if (expect_true (pending)) 3193 if (expect_true (pending))
2605} 3226}
2606 3227
2607/*****************************************************************************/ 3228/*****************************************************************************/
2608 3229
2609void noinline 3230void noinline
2610ev_io_start (EV_P_ ev_io *w) 3231ev_io_start (EV_P_ ev_io *w) EV_THROW
2611{ 3232{
2612 int fd = w->fd; 3233 int fd = w->fd;
2613 3234
2614 if (expect_false (ev_is_active (w))) 3235 if (expect_false (ev_is_active (w)))
2615 return; 3236 return;
2628 3249
2629 EV_FREQUENT_CHECK; 3250 EV_FREQUENT_CHECK;
2630} 3251}
2631 3252
2632void noinline 3253void noinline
2633ev_io_stop (EV_P_ ev_io *w) 3254ev_io_stop (EV_P_ ev_io *w) EV_THROW
2634{ 3255{
2635 clear_pending (EV_A_ (W)w); 3256 clear_pending (EV_A_ (W)w);
2636 if (expect_false (!ev_is_active (w))) 3257 if (expect_false (!ev_is_active (w)))
2637 return; 3258 return;
2638 3259
2647 3268
2648 EV_FREQUENT_CHECK; 3269 EV_FREQUENT_CHECK;
2649} 3270}
2650 3271
2651void noinline 3272void noinline
2652ev_timer_start (EV_P_ ev_timer *w) 3273ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2653{ 3274{
2654 if (expect_false (ev_is_active (w))) 3275 if (expect_false (ev_is_active (w)))
2655 return; 3276 return;
2656 3277
2657 ev_at (w) += mn_now; 3278 ev_at (w) += mn_now;
2671 3292
2672 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3293 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2673} 3294}
2674 3295
2675void noinline 3296void noinline
2676ev_timer_stop (EV_P_ ev_timer *w) 3297ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2677{ 3298{
2678 clear_pending (EV_A_ (W)w); 3299 clear_pending (EV_A_ (W)w);
2679 if (expect_false (!ev_is_active (w))) 3300 if (expect_false (!ev_is_active (w)))
2680 return; 3301 return;
2681 3302
2701 3322
2702 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
2703} 3324}
2704 3325
2705void noinline 3326void noinline
2706ev_timer_again (EV_P_ ev_timer *w) 3327ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2707{ 3328{
2708 EV_FREQUENT_CHECK; 3329 EV_FREQUENT_CHECK;
3330
3331 clear_pending (EV_A_ (W)w);
2709 3332
2710 if (ev_is_active (w)) 3333 if (ev_is_active (w))
2711 { 3334 {
2712 if (w->repeat) 3335 if (w->repeat)
2713 { 3336 {
2726 3349
2727 EV_FREQUENT_CHECK; 3350 EV_FREQUENT_CHECK;
2728} 3351}
2729 3352
2730ev_tstamp 3353ev_tstamp
2731ev_timer_remaining (EV_P_ ev_timer *w) 3354ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2732{ 3355{
2733 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3356 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2734} 3357}
2735 3358
2736#if EV_PERIODIC_ENABLE 3359#if EV_PERIODIC_ENABLE
2737void noinline 3360void noinline
2738ev_periodic_start (EV_P_ ev_periodic *w) 3361ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2739{ 3362{
2740 if (expect_false (ev_is_active (w))) 3363 if (expect_false (ev_is_active (w)))
2741 return; 3364 return;
2742 3365
2743 if (w->reschedule_cb) 3366 if (w->reschedule_cb)
2744 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3367 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2745 else if (w->interval) 3368 else if (w->interval)
2746 { 3369 {
2747 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3370 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2748 /* this formula differs from the one in periodic_reify because we do not always round up */ 3371 periodic_recalc (EV_A_ w);
2749 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2750 } 3372 }
2751 else 3373 else
2752 ev_at (w) = w->offset; 3374 ev_at (w) = w->offset;
2753 3375
2754 EV_FREQUENT_CHECK; 3376 EV_FREQUENT_CHECK;
2764 3386
2765 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3387 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2766} 3388}
2767 3389
2768void noinline 3390void noinline
2769ev_periodic_stop (EV_P_ ev_periodic *w) 3391ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2770{ 3392{
2771 clear_pending (EV_A_ (W)w); 3393 clear_pending (EV_A_ (W)w);
2772 if (expect_false (!ev_is_active (w))) 3394 if (expect_false (!ev_is_active (w)))
2773 return; 3395 return;
2774 3396
2792 3414
2793 EV_FREQUENT_CHECK; 3415 EV_FREQUENT_CHECK;
2794} 3416}
2795 3417
2796void noinline 3418void noinline
2797ev_periodic_again (EV_P_ ev_periodic *w) 3419ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2798{ 3420{
2799 /* TODO: use adjustheap and recalculation */ 3421 /* TODO: use adjustheap and recalculation */
2800 ev_periodic_stop (EV_A_ w); 3422 ev_periodic_stop (EV_A_ w);
2801 ev_periodic_start (EV_A_ w); 3423 ev_periodic_start (EV_A_ w);
2802} 3424}
2807#endif 3429#endif
2808 3430
2809#if EV_SIGNAL_ENABLE 3431#if EV_SIGNAL_ENABLE
2810 3432
2811void noinline 3433void noinline
2812ev_signal_start (EV_P_ ev_signal *w) 3434ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2813{ 3435{
2814 if (expect_false (ev_is_active (w))) 3436 if (expect_false (ev_is_active (w)))
2815 return; 3437 return;
2816 3438
2817 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3439 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2875 sa.sa_handler = ev_sighandler; 3497 sa.sa_handler = ev_sighandler;
2876 sigfillset (&sa.sa_mask); 3498 sigfillset (&sa.sa_mask);
2877 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3499 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2878 sigaction (w->signum, &sa, 0); 3500 sigaction (w->signum, &sa, 0);
2879 3501
3502 if (origflags & EVFLAG_NOSIGMASK)
3503 {
2880 sigemptyset (&sa.sa_mask); 3504 sigemptyset (&sa.sa_mask);
2881 sigaddset (&sa.sa_mask, w->signum); 3505 sigaddset (&sa.sa_mask, w->signum);
2882 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3506 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3507 }
2883#endif 3508#endif
2884 } 3509 }
2885 3510
2886 EV_FREQUENT_CHECK; 3511 EV_FREQUENT_CHECK;
2887} 3512}
2888 3513
2889void noinline 3514void noinline
2890ev_signal_stop (EV_P_ ev_signal *w) 3515ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2891{ 3516{
2892 clear_pending (EV_A_ (W)w); 3517 clear_pending (EV_A_ (W)w);
2893 if (expect_false (!ev_is_active (w))) 3518 if (expect_false (!ev_is_active (w)))
2894 return; 3519 return;
2895 3520
2926#endif 3551#endif
2927 3552
2928#if EV_CHILD_ENABLE 3553#if EV_CHILD_ENABLE
2929 3554
2930void 3555void
2931ev_child_start (EV_P_ ev_child *w) 3556ev_child_start (EV_P_ ev_child *w) EV_THROW
2932{ 3557{
2933#if EV_MULTIPLICITY 3558#if EV_MULTIPLICITY
2934 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3559 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2935#endif 3560#endif
2936 if (expect_false (ev_is_active (w))) 3561 if (expect_false (ev_is_active (w)))
2943 3568
2944 EV_FREQUENT_CHECK; 3569 EV_FREQUENT_CHECK;
2945} 3570}
2946 3571
2947void 3572void
2948ev_child_stop (EV_P_ ev_child *w) 3573ev_child_stop (EV_P_ ev_child *w) EV_THROW
2949{ 3574{
2950 clear_pending (EV_A_ (W)w); 3575 clear_pending (EV_A_ (W)w);
2951 if (expect_false (!ev_is_active (w))) 3576 if (expect_false (!ev_is_active (w)))
2952 return; 3577 return;
2953 3578
3028 if (!pend || pend == path) 3653 if (!pend || pend == path)
3029 break; 3654 break;
3030 3655
3031 *pend = 0; 3656 *pend = 0;
3032 w->wd = inotify_add_watch (fs_fd, path, mask); 3657 w->wd = inotify_add_watch (fs_fd, path, mask);
3033 } 3658 }
3034 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3659 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3035 } 3660 }
3036 } 3661 }
3037 3662
3038 if (w->wd >= 0) 3663 if (w->wd >= 0)
3105 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3730 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3106 ofs += sizeof (struct inotify_event) + ev->len; 3731 ofs += sizeof (struct inotify_event) + ev->len;
3107 } 3732 }
3108} 3733}
3109 3734
3110inline_size void 3735inline_size void ecb_cold
3111ev_check_2625 (EV_P) 3736ev_check_2625 (EV_P)
3112{ 3737{
3113 /* kernels < 2.6.25 are borked 3738 /* kernels < 2.6.25 are borked
3114 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3739 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3115 */ 3740 */
3120} 3745}
3121 3746
3122inline_size int 3747inline_size int
3123infy_newfd (void) 3748infy_newfd (void)
3124{ 3749{
3125#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 3750#if defined IN_CLOEXEC && defined IN_NONBLOCK
3126 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 3751 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3127 if (fd >= 0) 3752 if (fd >= 0)
3128 return fd; 3753 return fd;
3129#endif 3754#endif
3130 return inotify_init (); 3755 return inotify_init ();
3205#else 3830#else
3206# define EV_LSTAT(p,b) lstat (p, b) 3831# define EV_LSTAT(p,b) lstat (p, b)
3207#endif 3832#endif
3208 3833
3209void 3834void
3210ev_stat_stat (EV_P_ ev_stat *w) 3835ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3211{ 3836{
3212 if (lstat (w->path, &w->attr) < 0) 3837 if (lstat (w->path, &w->attr) < 0)
3213 w->attr.st_nlink = 0; 3838 w->attr.st_nlink = 0;
3214 else if (!w->attr.st_nlink) 3839 else if (!w->attr.st_nlink)
3215 w->attr.st_nlink = 1; 3840 w->attr.st_nlink = 1;
3254 ev_feed_event (EV_A_ w, EV_STAT); 3879 ev_feed_event (EV_A_ w, EV_STAT);
3255 } 3880 }
3256} 3881}
3257 3882
3258void 3883void
3259ev_stat_start (EV_P_ ev_stat *w) 3884ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3260{ 3885{
3261 if (expect_false (ev_is_active (w))) 3886 if (expect_false (ev_is_active (w)))
3262 return; 3887 return;
3263 3888
3264 ev_stat_stat (EV_A_ w); 3889 ev_stat_stat (EV_A_ w);
3285 3910
3286 EV_FREQUENT_CHECK; 3911 EV_FREQUENT_CHECK;
3287} 3912}
3288 3913
3289void 3914void
3290ev_stat_stop (EV_P_ ev_stat *w) 3915ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3291{ 3916{
3292 clear_pending (EV_A_ (W)w); 3917 clear_pending (EV_A_ (W)w);
3293 if (expect_false (!ev_is_active (w))) 3918 if (expect_false (!ev_is_active (w)))
3294 return; 3919 return;
3295 3920
3311} 3936}
3312#endif 3937#endif
3313 3938
3314#if EV_IDLE_ENABLE 3939#if EV_IDLE_ENABLE
3315void 3940void
3316ev_idle_start (EV_P_ ev_idle *w) 3941ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3317{ 3942{
3318 if (expect_false (ev_is_active (w))) 3943 if (expect_false (ev_is_active (w)))
3319 return; 3944 return;
3320 3945
3321 pri_adjust (EV_A_ (W)w); 3946 pri_adjust (EV_A_ (W)w);
3334 3959
3335 EV_FREQUENT_CHECK; 3960 EV_FREQUENT_CHECK;
3336} 3961}
3337 3962
3338void 3963void
3339ev_idle_stop (EV_P_ ev_idle *w) 3964ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3340{ 3965{
3341 clear_pending (EV_A_ (W)w); 3966 clear_pending (EV_A_ (W)w);
3342 if (expect_false (!ev_is_active (w))) 3967 if (expect_false (!ev_is_active (w)))
3343 return; 3968 return;
3344 3969
3358} 3983}
3359#endif 3984#endif
3360 3985
3361#if EV_PREPARE_ENABLE 3986#if EV_PREPARE_ENABLE
3362void 3987void
3363ev_prepare_start (EV_P_ ev_prepare *w) 3988ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3364{ 3989{
3365 if (expect_false (ev_is_active (w))) 3990 if (expect_false (ev_is_active (w)))
3366 return; 3991 return;
3367 3992
3368 EV_FREQUENT_CHECK; 3993 EV_FREQUENT_CHECK;
3373 3998
3374 EV_FREQUENT_CHECK; 3999 EV_FREQUENT_CHECK;
3375} 4000}
3376 4001
3377void 4002void
3378ev_prepare_stop (EV_P_ ev_prepare *w) 4003ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3379{ 4004{
3380 clear_pending (EV_A_ (W)w); 4005 clear_pending (EV_A_ (W)w);
3381 if (expect_false (!ev_is_active (w))) 4006 if (expect_false (!ev_is_active (w)))
3382 return; 4007 return;
3383 4008
3396} 4021}
3397#endif 4022#endif
3398 4023
3399#if EV_CHECK_ENABLE 4024#if EV_CHECK_ENABLE
3400void 4025void
3401ev_check_start (EV_P_ ev_check *w) 4026ev_check_start (EV_P_ ev_check *w) EV_THROW
3402{ 4027{
3403 if (expect_false (ev_is_active (w))) 4028 if (expect_false (ev_is_active (w)))
3404 return; 4029 return;
3405 4030
3406 EV_FREQUENT_CHECK; 4031 EV_FREQUENT_CHECK;
3411 4036
3412 EV_FREQUENT_CHECK; 4037 EV_FREQUENT_CHECK;
3413} 4038}
3414 4039
3415void 4040void
3416ev_check_stop (EV_P_ ev_check *w) 4041ev_check_stop (EV_P_ ev_check *w) EV_THROW
3417{ 4042{
3418 clear_pending (EV_A_ (W)w); 4043 clear_pending (EV_A_ (W)w);
3419 if (expect_false (!ev_is_active (w))) 4044 if (expect_false (!ev_is_active (w)))
3420 return; 4045 return;
3421 4046
3434} 4059}
3435#endif 4060#endif
3436 4061
3437#if EV_EMBED_ENABLE 4062#if EV_EMBED_ENABLE
3438void noinline 4063void noinline
3439ev_embed_sweep (EV_P_ ev_embed *w) 4064ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3440{ 4065{
3441 ev_run (w->other, EVRUN_NOWAIT); 4066 ev_run (w->other, EVRUN_NOWAIT);
3442} 4067}
3443 4068
3444static void 4069static void
3492 ev_idle_stop (EV_A_ idle); 4117 ev_idle_stop (EV_A_ idle);
3493} 4118}
3494#endif 4119#endif
3495 4120
3496void 4121void
3497ev_embed_start (EV_P_ ev_embed *w) 4122ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3498{ 4123{
3499 if (expect_false (ev_is_active (w))) 4124 if (expect_false (ev_is_active (w)))
3500 return; 4125 return;
3501 4126
3502 { 4127 {
3523 4148
3524 EV_FREQUENT_CHECK; 4149 EV_FREQUENT_CHECK;
3525} 4150}
3526 4151
3527void 4152void
3528ev_embed_stop (EV_P_ ev_embed *w) 4153ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3529{ 4154{
3530 clear_pending (EV_A_ (W)w); 4155 clear_pending (EV_A_ (W)w);
3531 if (expect_false (!ev_is_active (w))) 4156 if (expect_false (!ev_is_active (w)))
3532 return; 4157 return;
3533 4158
3543} 4168}
3544#endif 4169#endif
3545 4170
3546#if EV_FORK_ENABLE 4171#if EV_FORK_ENABLE
3547void 4172void
3548ev_fork_start (EV_P_ ev_fork *w) 4173ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3549{ 4174{
3550 if (expect_false (ev_is_active (w))) 4175 if (expect_false (ev_is_active (w)))
3551 return; 4176 return;
3552 4177
3553 EV_FREQUENT_CHECK; 4178 EV_FREQUENT_CHECK;
3558 4183
3559 EV_FREQUENT_CHECK; 4184 EV_FREQUENT_CHECK;
3560} 4185}
3561 4186
3562void 4187void
3563ev_fork_stop (EV_P_ ev_fork *w) 4188ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3564{ 4189{
3565 clear_pending (EV_A_ (W)w); 4190 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4191 if (expect_false (!ev_is_active (w)))
3567 return; 4192 return;
3568 4193
3581} 4206}
3582#endif 4207#endif
3583 4208
3584#if EV_CLEANUP_ENABLE 4209#if EV_CLEANUP_ENABLE
3585void 4210void
3586ev_cleanup_start (EV_P_ ev_cleanup *w) 4211ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3587{ 4212{
3588 if (expect_false (ev_is_active (w))) 4213 if (expect_false (ev_is_active (w)))
3589 return; 4214 return;
3590 4215
3591 EV_FREQUENT_CHECK; 4216 EV_FREQUENT_CHECK;
3592 4217
3593 ev_start (EV_A_ (W)w, ++cleanupcnt); 4218 ev_start (EV_A_ (W)w, ++cleanupcnt);
3594 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 4219 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3595 cleanups [cleanupcnt - 1] = w; 4220 cleanups [cleanupcnt - 1] = w;
3596 4221
4222 /* cleanup watchers should never keep a refcount on the loop */
4223 ev_unref (EV_A);
3597 EV_FREQUENT_CHECK; 4224 EV_FREQUENT_CHECK;
3598} 4225}
3599 4226
3600void 4227void
3601ev_cleanup_stop (EV_P_ ev_cleanup *w) 4228ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3602{ 4229{
3603 clear_pending (EV_A_ (W)w); 4230 clear_pending (EV_A_ (W)w);
3604 if (expect_false (!ev_is_active (w))) 4231 if (expect_false (!ev_is_active (w)))
3605 return; 4232 return;
3606 4233
3607 EV_FREQUENT_CHECK; 4234 EV_FREQUENT_CHECK;
4235 ev_ref (EV_A);
3608 4236
3609 { 4237 {
3610 int active = ev_active (w); 4238 int active = ev_active (w);
3611 4239
3612 cleanups [active - 1] = cleanups [--cleanupcnt]; 4240 cleanups [active - 1] = cleanups [--cleanupcnt];
3619} 4247}
3620#endif 4248#endif
3621 4249
3622#if EV_ASYNC_ENABLE 4250#if EV_ASYNC_ENABLE
3623void 4251void
3624ev_async_start (EV_P_ ev_async *w) 4252ev_async_start (EV_P_ ev_async *w) EV_THROW
3625{ 4253{
3626 if (expect_false (ev_is_active (w))) 4254 if (expect_false (ev_is_active (w)))
3627 return; 4255 return;
3628 4256
3629 w->sent = 0; 4257 w->sent = 0;
3638 4266
3639 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
3640} 4268}
3641 4269
3642void 4270void
3643ev_async_stop (EV_P_ ev_async *w) 4271ev_async_stop (EV_P_ ev_async *w) EV_THROW
3644{ 4272{
3645 clear_pending (EV_A_ (W)w); 4273 clear_pending (EV_A_ (W)w);
3646 if (expect_false (!ev_is_active (w))) 4274 if (expect_false (!ev_is_active (w)))
3647 return; 4275 return;
3648 4276
3659 4287
3660 EV_FREQUENT_CHECK; 4288 EV_FREQUENT_CHECK;
3661} 4289}
3662 4290
3663void 4291void
3664ev_async_send (EV_P_ ev_async *w) 4292ev_async_send (EV_P_ ev_async *w) EV_THROW
3665{ 4293{
3666 w->sent = 1; 4294 w->sent = 1;
3667 evpipe_write (EV_A_ &async_pending); 4295 evpipe_write (EV_A_ &async_pending);
3668} 4296}
3669#endif 4297#endif
3706 4334
3707 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4335 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3708} 4336}
3709 4337
3710void 4338void
3711ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4339ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3712{ 4340{
3713 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4341 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3714 4342
3715 if (expect_false (!once)) 4343 if (expect_false (!once))
3716 { 4344 {
3737} 4365}
3738 4366
3739/*****************************************************************************/ 4367/*****************************************************************************/
3740 4368
3741#if EV_WALK_ENABLE 4369#if EV_WALK_ENABLE
3742void 4370void ecb_cold
3743ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4371ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3744{ 4372{
3745 int i, j; 4373 int i, j;
3746 ev_watcher_list *wl, *wn; 4374 ev_watcher_list *wl, *wn;
3747 4375
3748 if (types & (EV_IO | EV_EMBED)) 4376 if (types & (EV_IO | EV_EMBED))
3791 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4419 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3792#endif 4420#endif
3793 4421
3794#if EV_IDLE_ENABLE 4422#if EV_IDLE_ENABLE
3795 if (types & EV_IDLE) 4423 if (types & EV_IDLE)
3796 for (j = NUMPRI; i--; ) 4424 for (j = NUMPRI; j--; )
3797 for (i = idlecnt [j]; i--; ) 4425 for (i = idlecnt [j]; i--; )
3798 cb (EV_A_ EV_IDLE, idles [j][i]); 4426 cb (EV_A_ EV_IDLE, idles [j][i]);
3799#endif 4427#endif
3800 4428
3801#if EV_FORK_ENABLE 4429#if EV_FORK_ENABLE
3854 4482
3855#if EV_MULTIPLICITY 4483#if EV_MULTIPLICITY
3856 #include "ev_wrap.h" 4484 #include "ev_wrap.h"
3857#endif 4485#endif
3858 4486
3859EV_CPP(})
3860

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