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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.479 by root, Sun Dec 20 01:31:17 2015 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) 2007,2008,2009,2010,2011,2012,2013 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>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 247#endif
233/* but consider reporting it, too! :) */ 248
234# define EV_NSIG 65 249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
235#endif 251#endif
236 252
237#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 256# else
241# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
242# endif 258# endif
243#endif 259#endif
244 260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
245#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 272# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 273# else
249# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
250# endif 275# endif
251#endif 276#endif
… …
338 363
339#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 366#endif
342 367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 385/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 386#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 387# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 388# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 390# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 391# define EV_USE_MONOTONIC 1
351# else 392# else
… …
354# endif 395# endif
355#endif 396#endif
356 397
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 399
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
368#endif 403#endif
369 404
… …
376# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
378#endif 413#endif
379 414
380#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 418# include <sys/select.h>
383# endif 419# endif
384#endif 420#endif
385 421
386#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 423# include <sys/statfs.h>
389# include <sys/inotify.h> 424# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 426# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 427# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 428# define EV_USE_INOTIFY 0
394# endif 429# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 430#endif
400 431
401#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 434# include <stdint.h>
… …
443#else 474#else
444# define EV_FREQUENT_CHECK do { } while (0) 475# define EV_FREQUENT_CHECK do { } while (0)
445#endif 476#endif
446 477
447/* 478/*
448 * This is used to avoid floating point rounding problems. 479 * 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. 480 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 481 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 484
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#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) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 487
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 488#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) 489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010005
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 546 #if __GNUC__
547 typedef signed long long int64_t;
548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
562#else
563 #include <inttypes.h>
564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
580 #endif
581#endif
582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#if 1400 <= _MSC_VER
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
654#endif
655
656#ifndef ECB_MEMORY_FENCE
657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
658 #if __i386 || __i386__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif ECB_GCC_AMD64
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
682 #elif __aarch64__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
688 #elif defined __s390__ || defined __s390x__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
694 #elif defined __alpha__
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
696 #elif defined __hppa__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
699 #elif defined __ia64__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
705 #elif defined __sh__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
707 #endif
708 #endif
709#endif
710
711#ifndef ECB_MEMORY_FENCE
712 #if ECB_GCC_VERSION(4,7)
713 /* see comment below (stdatomic.h) about the C11 memory model. */
714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
717
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
723
724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
737 #elif defined _WIN32
738 #include <WinNT.h>
739 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
740 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
741 #include <mbarrier.h>
742 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
743 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
744 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
745 #elif __xlC__
746 #define ECB_MEMORY_FENCE __sync ()
747 #endif
748#endif
749
750#ifndef ECB_MEMORY_FENCE
751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
752 /* we assume that these memory fences work on all variables/all memory accesses, */
753 /* not just C11 atomics and atomic accesses */
754 #include <stdatomic.h>
755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
764 #endif
765#endif
766
767#ifndef ECB_MEMORY_FENCE
768 #if !ECB_AVOID_PTHREADS
769 /*
770 * if you get undefined symbol references to pthread_mutex_lock,
771 * or failure to find pthread.h, then you should implement
772 * the ECB_MEMORY_FENCE operations for your cpu/compiler
773 * OR provide pthread.h and link against the posix thread library
774 * of your system.
775 */
776 #include <pthread.h>
777 #define ECB_NEEDS_PTHREADS 1
778 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
779
780 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
781 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
782 #endif
783#endif
784
785#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
786 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
787#endif
788
789#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
791#endif
792
793/*****************************************************************************/
794
795#if ECB_CPP
796 #define ecb_inline static inline
797#elif ECB_GCC_VERSION(2,5)
798 #define ecb_inline static __inline__
799#elif ECB_C99
800 #define ecb_inline static inline
801#else
802 #define ecb_inline static
803#endif
804
805#if ECB_GCC_VERSION(3,3)
806 #define ecb_restrict __restrict__
807#elif ECB_C99
808 #define ecb_restrict restrict
809#else
810 #define ecb_restrict
811#endif
812
813typedef int ecb_bool;
814
815#define ECB_CONCAT_(a, b) a ## b
816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
817#define ECB_STRINGIFY_(a) # a
818#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
820
821#define ecb_function_ ecb_inline
822
823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
825#else
826 #define ecb_attribute(attrlist)
827#endif
828
829#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
831#else
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
835
836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 841#else
467# define expect(expr,value) (expr) 842 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 843#endif
472#endif
473 844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
847#else
848 #define ecb_prefetch(addr,rw,locality)
849#endif
850
851/* no emulation for ecb_decltype */
852#if ECB_CPP11
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
857 #define ecb_decltype(x) __typeof__ (x)
858#endif
859
860#if _MSC_VER >= 1300
861 #define ecb_deprecated __declspec (deprecated)
862#else
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
864#endif
865
866#if _MSC_VER >= 1500
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868#elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
870#else
871 #define ecb_deprecated_message(msg) ecb_deprecated
872#endif
873
874#if _MSC_VER >= 1400
875 #define ecb_noinline __declspec (noinline)
876#else
877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
880#define ecb_unused ecb_attribute ((__unused__))
881#define ecb_const ecb_attribute ((__const__))
882#define ecb_pure ecb_attribute ((__pure__))
883
884#if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
886 #define ecb_noreturn _Noreturn
887#elif ECB_CPP11
888 #define ecb_noreturn [[noreturn]]
889#elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
892#else
893 #define ecb_noreturn ecb_attribute ((__noreturn__))
894#endif
895
896#if ECB_GCC_VERSION(4,3)
897 #define ecb_artificial ecb_attribute ((__artificial__))
898 #define ecb_hot ecb_attribute ((__hot__))
899 #define ecb_cold ecb_attribute ((__cold__))
900#else
901 #define ecb_artificial
902 #define ecb_hot
903 #define ecb_cold
904#endif
905
906/* put around conditional expressions if you are very sure that the */
907/* expression is mostly true or mostly false. note that these return */
908/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 909#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 910#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
911/* for compatibility to the rest of the world */
912#define ecb_likely(expr) ecb_expect_true (expr)
913#define ecb_unlikely(expr) ecb_expect_false (expr)
914
915/* count trailing zero bits and count # of one bits */
916#if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
923 #define ecb_ctz32(x) __builtin_ctz (x)
924 #define ecb_ctz64(x) __builtin_ctzll (x)
925 #define ecb_popcount32(x) __builtin_popcount (x)
926 /* no popcountll */
927#else
928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
929 ecb_function_ ecb_const int
930 ecb_ctz32 (uint32_t x)
931 {
932#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
933 unsigned long r;
934 _BitScanForward (&r, x);
935 return (int)r;
936#else
937 int r = 0;
938
939 x &= ~x + 1; /* this isolates the lowest bit */
940
941#if ECB_branchless_on_i386
942 r += !!(x & 0xaaaaaaaa) << 0;
943 r += !!(x & 0xcccccccc) << 1;
944 r += !!(x & 0xf0f0f0f0) << 2;
945 r += !!(x & 0xff00ff00) << 3;
946 r += !!(x & 0xffff0000) << 4;
947#else
948 if (x & 0xaaaaaaaa) r += 1;
949 if (x & 0xcccccccc) r += 2;
950 if (x & 0xf0f0f0f0) r += 4;
951 if (x & 0xff00ff00) r += 8;
952 if (x & 0xffff0000) r += 16;
953#endif
954
955 return r;
956#endif
957 }
958
959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
960 ecb_function_ ecb_const int
961 ecb_ctz64 (uint64_t x)
962 {
963#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
964 unsigned long r;
965 _BitScanForward64 (&r, x);
966 return (int)r;
967#else
968 int shift = x & 0xffffffff ? 0 : 32;
969 return ecb_ctz32 (x >> shift) + shift;
970#endif
971 }
972
973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
974 ecb_function_ ecb_const int
975 ecb_popcount32 (uint32_t x)
976 {
977 x -= (x >> 1) & 0x55555555;
978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
979 x = ((x >> 4) + x) & 0x0f0f0f0f;
980 x *= 0x01010101;
981
982 return x >> 24;
983 }
984
985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
987 {
988#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
989 unsigned long r;
990 _BitScanReverse (&r, x);
991 return (int)r;
992#else
993 int r = 0;
994
995 if (x >> 16) { x >>= 16; r += 16; }
996 if (x >> 8) { x >>= 8; r += 8; }
997 if (x >> 4) { x >>= 4; r += 4; }
998 if (x >> 2) { x >>= 2; r += 2; }
999 if (x >> 1) { r += 1; }
1000
1001 return r;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1007 {
1008#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1009 unsigned long r;
1010 _BitScanReverse64 (&r, x);
1011 return (int)r;
1012#else
1013 int r = 0;
1014
1015 if (x >> 32) { x >>= 32; r += 32; }
1016
1017 return r + ecb_ld32 (x);
1018#endif
1019 }
1020#endif
1021
1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1023ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1025ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1026
1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1029{
1030 return ( (x * 0x0802U & 0x22110U)
1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1032}
1033
1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1036{
1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1040 x = ( x >> 8 ) | ( x << 8);
1041
1042 return x;
1043}
1044
1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1047{
1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1052 x = ( x >> 16 ) | ( x << 16);
1053
1054 return x;
1055}
1056
1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
1058/* so for this version we are lazy */
1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1060ecb_function_ ecb_const int
1061ecb_popcount64 (uint64_t x)
1062{
1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1064}
1065
1066ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1067ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1068ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1069ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1070ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1071ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1072ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1073ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1074
1075ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1076ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1077ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1078ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1079ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1080ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1081ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1082ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1083
1084#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1087 #else
1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1092#elif _MSC_VER
1093 #include <stdlib.h>
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1097#else
1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1099 ecb_function_ ecb_const uint16_t
1100 ecb_bswap16 (uint16_t x)
1101 {
1102 return ecb_rotl16 (x, 8);
1103 }
1104
1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1106 ecb_function_ ecb_const uint32_t
1107 ecb_bswap32 (uint32_t x)
1108 {
1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1110 }
1111
1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1113 ecb_function_ ecb_const uint64_t
1114 ecb_bswap64 (uint64_t x)
1115 {
1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1117 }
1118#endif
1119
1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1121 #define ecb_unreachable() __builtin_unreachable ()
1122#else
1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1126#endif
1127
1128/* try to tell the compiler that some condition is definitely true */
1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1130
1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1132ecb_inline ecb_const uint32_t
1133ecb_byteorder_helper (void)
1134{
1135 /* the union code still generates code under pressure in gcc, */
1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1144 return 0x44332211;
1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1148 return 0x11223344;
1149#else
1150 union
1151 {
1152 uint8_t c[4];
1153 uint32_t u;
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1155 return u.u;
1156#endif
1157}
1158
1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1160ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1162ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1163
1164#if ECB_GCC_VERSION(3,0) || ECB_C99
1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1166#else
1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1168#endif
1169
1170#if ECB_CPP
1171 template<typename T>
1172 static inline T ecb_div_rd (T val, T div)
1173 {
1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1175 }
1176 template<typename T>
1177 static inline T ecb_div_ru (T val, T div)
1178 {
1179 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1180 }
1181#else
1182 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1183 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1184#endif
1185
1186#if ecb_cplusplus_does_not_suck
1187 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1188 template<typename T, int N>
1189 static inline int ecb_array_length (const T (&arr)[N])
1190 {
1191 return N;
1192 }
1193#else
1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1195#endif
1196
1197ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198ecb_function_ ecb_const uint32_t
1199ecb_binary16_to_binary32 (uint32_t x)
1200{
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1204
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1209 {
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1212 e = 0 - (127 - 15);
1213 else
1214 {
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1217
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1219 e -= s - 1;
1220 }
1221 }
1222
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1224 e += 127 - 15;
1225
1226 return s | (e << 23) | (m << (23 - 10));
1227}
1228
1229ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230ecb_function_ ecb_const uint16_t
1231ecb_binary32_to_binary16 (uint32_t x)
1232{
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1236
1237 x &= 0x7fffffff;
1238
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1241 {
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1244
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1247 {
1248 m >>= 1;
1249 e += 1;
1250 }
1251
1252 return s | (e << 10) | (m >> (23 - 10));
1253 }
1254
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1257 return s | 0x7c00;
1258
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1261 {
1262 /* zero */
1263 if (ecb_expect_true (!x))
1264 return s;
1265
1266 /* handle subnormals */
1267
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1270 return s;
1271
1272 m |= 0x00800000; /* make implicit bit explicit */
1273
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1275 {
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1279
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1282 }
1283
1284 return s | m;
1285 }
1286
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1288 m >>= 13;
1289
1290 return s | 0x7c00 | m | !m;
1291}
1292
1293/*******************************************************************************/
1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1295
1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1298#if 0 \
1299 || __i386 || __i386__ \
1300 || ECB_GCC_AMD64 \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1309 || defined __sh__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1313 #define ECB_STDFP 1
1314 #include <string.h> /* for memcpy */
1315#else
1316 #define ECB_STDFP 0
1317#endif
1318
1319#ifndef ECB_NO_LIBM
1320
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1322
1323 /* only the oldest of old doesn't have this one. solaris. */
1324 #ifdef INFINITY
1325 #define ECB_INFINITY INFINITY
1326 #else
1327 #define ECB_INFINITY HUGE_VAL
1328 #endif
1329
1330 #ifdef NAN
1331 #define ECB_NAN NAN
1332 #else
1333 #define ECB_NAN ECB_INFINITY
1334 #endif
1335
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1339 #else
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1342 #endif
1343
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1348 {
1349 uint32_t r;
1350
1351 #if ECB_STDFP
1352 memcpy (&r, &x, 4);
1353 #else
1354 /* slow emulation, works for anything but -0 */
1355 uint32_t m;
1356 int e;
1357
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1362
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1364
1365 r = m & 0x80000000U;
1366
1367 if (r)
1368 m = -m;
1369
1370 if (e <= -126)
1371 {
1372 m &= 0xffffffU;
1373 m >>= (-125 - e);
1374 e = -126;
1375 }
1376
1377 r |= (e + 126) << 23;
1378 r |= m & 0x7fffffU;
1379 #endif
1380
1381 return r;
1382 }
1383
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1388 {
1389 float r;
1390
1391 #if ECB_STDFP
1392 memcpy (&r, &x, 4);
1393 #else
1394 /* emulation, only works for normals and subnormals and +0 */
1395 int neg = x >> 31;
1396 int e = (x >> 23) & 0xffU;
1397
1398 x &= 0x7fffffU;
1399
1400 if (e)
1401 x |= 0x800000U;
1402 else
1403 e = 1;
1404
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1407
1408 r = neg ? -r : r;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1418 {
1419 uint64_t r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 8);
1423 #else
1424 /* slow emulation, works for anything but -0 */
1425 uint64_t m;
1426 int e;
1427
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1432
1433 m = frexp (x, &e) * 0x20000000000000U;
1434
1435 r = m & 0x8000000000000000;;
1436
1437 if (r)
1438 m = -m;
1439
1440 if (e <= -1022)
1441 {
1442 m &= 0x1fffffffffffffU;
1443 m >>= (-1021 - e);
1444 e = -1022;
1445 }
1446
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1449 #endif
1450
1451 return r;
1452 }
1453
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1458 {
1459 double r;
1460
1461 #if ECB_STDFP
1462 memcpy (&r, &x, 8);
1463 #else
1464 /* emulation, only works for normals and subnormals and +0 */
1465 int neg = x >> 63;
1466 int e = (x >> 52) & 0x7ffU;
1467
1468 x &= 0xfffffffffffffU;
1469
1470 if (e)
1471 x |= 0x10000000000000U;
1472 else
1473 e = 1;
1474
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1477
1478 r = neg ? -r : r;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1488 {
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1490 }
1491
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1496 {
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1498 }
1499
1500#endif
1501
1502#endif
1503
1504/* ECB.H END */
1505
1506#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1507/* if your architecture doesn't need memory fences, e.g. because it is
1508 * single-cpu/core, or if you use libev in a project that doesn't use libev
1509 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1510 * libev, in which cases the memory fences become nops.
1511 * alternatively, you can remove this #error and link against libpthread,
1512 * which will then provide the memory fences.
1513 */
1514# error "memory fences not defined for your architecture, please report"
1515#endif
1516
1517#ifndef ECB_MEMORY_FENCE
1518# define ECB_MEMORY_FENCE do { } while (0)
1519# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1520# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1521#endif
1522
1523#define expect_false(cond) ecb_expect_false (cond)
1524#define expect_true(cond) ecb_expect_true (cond)
1525#define noinline ecb_noinline
1526
476#define inline_size static inline 1527#define inline_size ecb_inline
477 1528
478#if EV_FEATURE_CODE 1529#if EV_FEATURE_CODE
479# define inline_speed static inline 1530# define inline_speed ecb_inline
480#else 1531#else
481# define inline_speed static noinline 1532# define inline_speed static noinline
482#endif 1533#endif
483 1534
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1574# include "ev_win32.c"
524#endif 1575#endif
525 1576
526/*****************************************************************************/ 1577/*****************************************************************************/
527 1578
1579/* define a suitable floor function (only used by periodics atm) */
1580
1581#if EV_USE_FLOOR
1582# include <math.h>
1583# define ev_floor(v) floor (v)
1584#else
1585
1586#include <float.h>
1587
1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589static ev_tstamp noinline
1590ev_floor (ev_tstamp v)
1591{
1592 /* the choice of shift factor is not terribly important */
1593#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1594 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1595#else
1596 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1597#endif
1598
1599 /* argument too large for an unsigned long? */
1600 if (expect_false (v >= shift))
1601 {
1602 ev_tstamp f;
1603
1604 if (v == v - 1.)
1605 return v; /* very large number */
1606
1607 f = shift * ev_floor (v * (1. / shift));
1608 return f + ev_floor (v - f);
1609 }
1610
1611 /* special treatment for negative args? */
1612 if (expect_false (v < 0.))
1613 {
1614 ev_tstamp f = -ev_floor (-v);
1615
1616 return f - (f == v ? 0 : 1);
1617 }
1618
1619 /* fits into an unsigned long */
1620 return (unsigned long)v;
1621}
1622
1623#endif
1624
1625/*****************************************************************************/
1626
1627#ifdef __linux
1628# include <sys/utsname.h>
1629#endif
1630
1631static unsigned int noinline ecb_cold
1632ev_linux_version (void)
1633{
1634#ifdef __linux
1635 unsigned int v = 0;
1636 struct utsname buf;
1637 int i;
1638 char *p = buf.release;
1639
1640 if (uname (&buf))
1641 return 0;
1642
1643 for (i = 3+1; --i; )
1644 {
1645 unsigned int c = 0;
1646
1647 for (;;)
1648 {
1649 if (*p >= '0' && *p <= '9')
1650 c = c * 10 + *p++ - '0';
1651 else
1652 {
1653 p += *p == '.';
1654 break;
1655 }
1656 }
1657
1658 v = (v << 8) | c;
1659 }
1660
1661 return v;
1662#else
1663 return 0;
1664#endif
1665}
1666
1667/*****************************************************************************/
1668
528#if EV_AVOID_STDIO 1669#if EV_AVOID_STDIO
529static void noinline 1670static void noinline ecb_cold
530ev_printerr (const char *msg) 1671ev_printerr (const char *msg)
531{ 1672{
532 write (STDERR_FILENO, msg, strlen (msg)); 1673 write (STDERR_FILENO, msg, strlen (msg));
533} 1674}
534#endif 1675#endif
535 1676
536static void (*syserr_cb)(const char *msg); 1677static void (*syserr_cb)(const char *msg) EV_THROW;
537 1678
538void 1679void ecb_cold
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1680ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
540{ 1681{
541 syserr_cb = cb; 1682 syserr_cb = cb;
542} 1683}
543 1684
544static void noinline 1685static void noinline ecb_cold
545ev_syserr (const char *msg) 1686ev_syserr (const char *msg)
546{ 1687{
547 if (!msg) 1688 if (!msg)
548 msg = "(libev) system error"; 1689 msg = "(libev) system error";
549 1690
550 if (syserr_cb) 1691 if (syserr_cb)
551 syserr_cb (msg); 1692 syserr_cb (msg);
552 else 1693 else
553 { 1694 {
554#if EV_AVOID_STDIO 1695#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1696 ev_printerr (msg);
558 ev_printerr (": "); 1697 ev_printerr (": ");
559 ev_printerr (err); 1698 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1699 ev_printerr ("\n");
561#else 1700#else
562 perror (msg); 1701 perror (msg);
563#endif 1702#endif
564 abort (); 1703 abort ();
565 } 1704 }
566} 1705}
567 1706
568static void * 1707static void *
569ev_realloc_emul (void *ptr, long size) 1708ev_realloc_emul (void *ptr, long size) EV_THROW
570{ 1709{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1710 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1711 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1712 * the single unix specification, so work around them here.
1713 * recently, also (at least) fedora and debian started breaking it,
1714 * despite documenting it otherwise.
577 */ 1715 */
578 1716
579 if (size) 1717 if (size)
580 return realloc (ptr, size); 1718 return realloc (ptr, size);
581 1719
582 free (ptr); 1720 free (ptr);
583 return 0; 1721 return 0;
584#endif
585} 1722}
586 1723
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1724static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
588 1725
589void 1726void ecb_cold
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1727ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
591{ 1728{
592 alloc = cb; 1729 alloc = cb;
593} 1730}
594 1731
595inline_speed void * 1732inline_speed void *
… …
598 ptr = alloc (ptr, size); 1735 ptr = alloc (ptr, size);
599 1736
600 if (!ptr && size) 1737 if (!ptr && size)
601 { 1738 {
602#if EV_AVOID_STDIO 1739#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1740 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1741#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1742 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1743#endif
607 abort (); 1744 abort ();
608 } 1745 }
609 1746
610 return ptr; 1747 return ptr;
… …
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1764 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
628 unsigned char unused; 1765 unsigned char unused;
629#if EV_USE_EPOLL 1766#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1767 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1768#endif
632#if EV_SELECT_IS_WINSOCKET 1769#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1770 SOCKET handle;
1771#endif
1772#if EV_USE_IOCP
1773 OVERLAPPED or, ow;
634#endif 1774#endif
635} ANFD; 1775} ANFD;
636 1776
637/* stores the pending event set for a given watcher */ 1777/* stores the pending event set for a given watcher */
638typedef struct 1778typedef struct
… …
680 #undef VAR 1820 #undef VAR
681 }; 1821 };
682 #include "ev_wrap.h" 1822 #include "ev_wrap.h"
683 1823
684 static struct ev_loop default_loop_struct; 1824 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1825 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1826
687#else 1827#else
688 1828
689 ev_tstamp ev_rt_now; 1829 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1830 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1831 #include "ev_vars.h"
692 #undef VAR 1832 #undef VAR
693 1833
694 static int ev_default_loop_ptr; 1834 static int ev_default_loop_ptr;
… …
709 1849
710/*****************************************************************************/ 1850/*****************************************************************************/
711 1851
712#ifndef EV_HAVE_EV_TIME 1852#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1853ev_tstamp
714ev_time (void) 1854ev_time (void) EV_THROW
715{ 1855{
716#if EV_USE_REALTIME 1856#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1857 if (expect_true (have_realtime))
718 { 1858 {
719 struct timespec ts; 1859 struct timespec ts;
… …
743 return ev_time (); 1883 return ev_time ();
744} 1884}
745 1885
746#if EV_MULTIPLICITY 1886#if EV_MULTIPLICITY
747ev_tstamp 1887ev_tstamp
748ev_now (EV_P) 1888ev_now (EV_P) EV_THROW
749{ 1889{
750 return ev_rt_now; 1890 return ev_rt_now;
751} 1891}
752#endif 1892#endif
753 1893
754void 1894void
755ev_sleep (ev_tstamp delay) 1895ev_sleep (ev_tstamp delay) EV_THROW
756{ 1896{
757 if (delay > 0.) 1897 if (delay > 0.)
758 { 1898 {
759#if EV_USE_NANOSLEEP 1899#if EV_USE_NANOSLEEP
760 struct timespec ts; 1900 struct timespec ts;
761 1901
762 EV_TS_SET (ts, delay); 1902 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 1903 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1904#elif defined _WIN32
765 Sleep ((unsigned long)(delay * 1e3)); 1905 Sleep ((unsigned long)(delay * 1e3));
766#else 1906#else
767 struct timeval tv; 1907 struct timeval tv;
768 1908
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1909 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 1928
789 do 1929 do
790 ncur <<= 1; 1930 ncur <<= 1;
791 while (cnt > ncur); 1931 while (cnt > ncur);
792 1932
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1933 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1934 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 1935 {
796 ncur *= elem; 1936 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1937 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 1938 ncur = ncur - sizeof (void *) * 4;
… …
800 } 1940 }
801 1941
802 return ncur; 1942 return ncur;
803} 1943}
804 1944
805static noinline void * 1945static void * noinline ecb_cold
806array_realloc (int elem, void *base, int *cur, int cnt) 1946array_realloc (int elem, void *base, int *cur, int cnt)
807{ 1947{
808 *cur = array_nextsize (elem, *cur, cnt); 1948 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 1949 return ev_realloc (base, elem * *cur);
810} 1950}
… …
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1953 memset ((void *)(base), 0, sizeof (*(base)) * (count))
814 1954
815#define array_needsize(type,base,cur,cnt,init) \ 1955#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 1956 if (expect_false ((cnt) > (cur))) \
817 { \ 1957 { \
818 int ocur_ = (cur); \ 1958 int ecb_unused ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 1959 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 1960 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 1961 init ((base) + (ocur_), (cur) - ocur_); \
822 } 1962 }
823 1963
… …
841pendingcb (EV_P_ ev_prepare *w, int revents) 1981pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 1982{
843} 1983}
844 1984
845void noinline 1985void noinline
846ev_feed_event (EV_P_ void *w, int revents) 1986ev_feed_event (EV_P_ void *w, int revents) EV_THROW
847{ 1987{
848 W w_ = (W)w; 1988 W w_ = (W)w;
849 int pri = ABSPRI (w_); 1989 int pri = ABSPRI (w_);
850 1990
851 if (expect_false (w_->pending)) 1991 if (expect_false (w_->pending))
… …
855 w_->pending = ++pendingcnt [pri]; 1995 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1996 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
857 pendings [pri][w_->pending - 1].w = w_; 1997 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 1998 pendings [pri][w_->pending - 1].events = revents;
859 } 1999 }
2000
2001 pendingpri = NUMPRI - 1;
860} 2002}
861 2003
862inline_speed void 2004inline_speed void
863feed_reverse (EV_P_ W w) 2005feed_reverse (EV_P_ W w)
864{ 2006{
… …
910 if (expect_true (!anfd->reify)) 2052 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2053 fd_event_nocheck (EV_A_ fd, revents);
912} 2054}
913 2055
914void 2056void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2057ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
916{ 2058{
917 if (fd >= 0 && fd < anfdmax) 2059 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2060 fd_event_nocheck (EV_A_ fd, revents);
919} 2061}
920 2062
… …
923inline_size void 2065inline_size void
924fd_reify (EV_P) 2066fd_reify (EV_P)
925{ 2067{
926 int i; 2068 int i;
927 2069
2070#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2071 for (i = 0; i < fdchangecnt; ++i)
2072 {
2073 int fd = fdchanges [i];
2074 ANFD *anfd = anfds + fd;
2075
2076 if (anfd->reify & EV__IOFDSET && anfd->head)
2077 {
2078 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2079
2080 if (handle != anfd->handle)
2081 {
2082 unsigned long arg;
2083
2084 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2085
2086 /* handle changed, but fd didn't - we need to do it in two steps */
2087 backend_modify (EV_A_ fd, anfd->events, 0);
2088 anfd->events = 0;
2089 anfd->handle = handle;
2090 }
2091 }
2092 }
2093#endif
2094
928 for (i = 0; i < fdchangecnt; ++i) 2095 for (i = 0; i < fdchangecnt; ++i)
929 { 2096 {
930 int fd = fdchanges [i]; 2097 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2098 ANFD *anfd = anfds + fd;
932 ev_io *w; 2099 ev_io *w;
… …
934 unsigned char o_events = anfd->events; 2101 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2102 unsigned char o_reify = anfd->reify;
936 2103
937 anfd->reify = 0; 2104 anfd->reify = 0;
938 2105
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2106 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2107 {
950 anfd->events = 0; 2108 anfd->events = 0;
951 2109
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2110 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
977 fdchanges [fdchangecnt - 1] = fd; 2135 fdchanges [fdchangecnt - 1] = fd;
978 } 2136 }
979} 2137}
980 2138
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2139/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2140inline_speed void ecb_cold
983fd_kill (EV_P_ int fd) 2141fd_kill (EV_P_ int fd)
984{ 2142{
985 ev_io *w; 2143 ev_io *w;
986 2144
987 while ((w = (ev_io *)anfds [fd].head)) 2145 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2148 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2149 }
992} 2150}
993 2151
994/* check whether the given fd is actually valid, for error recovery */ 2152/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2153inline_size int ecb_cold
996fd_valid (int fd) 2154fd_valid (int fd)
997{ 2155{
998#ifdef _WIN32 2156#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2157 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2158#else
1001 return fcntl (fd, F_GETFD) != -1; 2159 return fcntl (fd, F_GETFD) != -1;
1002#endif 2160#endif
1003} 2161}
1004 2162
1005/* called on EBADF to verify fds */ 2163/* called on EBADF to verify fds */
1006static void noinline 2164static void noinline ecb_cold
1007fd_ebadf (EV_P) 2165fd_ebadf (EV_P)
1008{ 2166{
1009 int fd; 2167 int fd;
1010 2168
1011 for (fd = 0; fd < anfdmax; ++fd) 2169 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2171 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2172 fd_kill (EV_A_ fd);
1015} 2173}
1016 2174
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2175/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2176static void noinline ecb_cold
1019fd_enomem (EV_P) 2177fd_enomem (EV_P)
1020{ 2178{
1021 int fd; 2179 int fd;
1022 2180
1023 for (fd = anfdmax; fd--; ) 2181 for (fd = anfdmax; fd--; )
… …
1218 2376
1219/*****************************************************************************/ 2377/*****************************************************************************/
1220 2378
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2379#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2380
1223static void noinline 2381static void noinline ecb_cold
1224evpipe_init (EV_P) 2382evpipe_init (EV_P)
1225{ 2383{
1226 if (!ev_is_active (&pipe_w)) 2384 if (!ev_is_active (&pipe_w))
1227 { 2385 {
2386 int fds [2];
2387
1228# if EV_USE_EVENTFD 2388# if EV_USE_EVENTFD
2389 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2390 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2391 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2392 fds [1] = eventfd (0, 0);
1232 2393
1233 if (evfd >= 0) 2394 if (fds [1] < 0)
2395# endif
1234 { 2396 {
2397 while (pipe (fds))
2398 ev_syserr ("(libev) error creating signal/async pipe");
2399
2400 fd_intern (fds [0]);
2401 }
2402
1235 evpipe [0] = -1; 2403 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2404
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2405 if (evpipe [1] < 0)
2406 evpipe [1] = fds [1]; /* first call, set write fd */
2407 else
2408 {
2409 /* on subsequent calls, do not change evpipe [1] */
2410 /* so that evpipe_write can always rely on its value. */
2411 /* this branch does not do anything sensible on windows, */
2412 /* so must not be executed on windows */
2413
2414 dup2 (fds [1], evpipe [1]);
2415 close (fds [1]);
2416 }
2417
2418 fd_intern (evpipe [1]);
2419
2420 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2421 ev_io_start (EV_A_ &pipe_w);
2422 ev_unref (EV_A); /* watcher should not keep loop alive */
2423 }
2424}
2425
2426inline_speed void
2427evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2428{
2429 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2430
2431 if (expect_true (*flag))
2432 return;
2433
2434 *flag = 1;
2435 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2436
2437 pipe_write_skipped = 1;
2438
2439 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2440
2441 if (pipe_write_wanted)
2442 {
2443 int old_errno;
2444
2445 pipe_write_skipped = 0;
2446 ECB_MEMORY_FENCE_RELEASE;
2447
2448 old_errno = errno; /* save errno because write will clobber it */
2449
2450#if EV_USE_EVENTFD
2451 if (evpipe [0] < 0)
2452 {
2453 uint64_t counter = 1;
2454 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2455 }
1239 else 2456 else
1240# endif 2457#endif
1241 { 2458 {
1242 while (pipe (evpipe)) 2459#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2460 WSABUF buf;
1244 2461 DWORD sent;
1245 fd_intern (evpipe [0]); 2462 buf.buf = &buf;
1246 fd_intern (evpipe [1]); 2463 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2464 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2465#else
2466 write (evpipe [1], &(evpipe [1]), 1);
2467#endif
1248 } 2468 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 2469
1280 errno = old_errno; 2470 errno = old_errno;
1281 } 2471 }
1282} 2472}
1283 2473
… …
1286static void 2476static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2477pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2478{
1289 int i; 2479 int i;
1290 2480
2481 if (revents & EV_READ)
2482 {
1291#if EV_USE_EVENTFD 2483#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2484 if (evpipe [0] < 0)
1293 { 2485 {
1294 uint64_t counter; 2486 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2487 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2488 }
1297 else 2489 else
1298#endif 2490#endif
1299 { 2491 {
1300 char dummy; 2492 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2493#ifdef _WIN32
2494 WSABUF buf;
2495 DWORD recvd;
2496 DWORD flags = 0;
2497 buf.buf = dummy;
2498 buf.len = sizeof (dummy);
2499 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2500#else
1302 read (evpipe [0], &dummy, 1); 2501 read (evpipe [0], &dummy, sizeof (dummy));
2502#endif
2503 }
1303 } 2504 }
1304 2505
2506 pipe_write_skipped = 0;
2507
2508 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2509
2510#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2511 if (sig_pending)
1306 { 2512 {
1307 sig_pending = 0; 2513 sig_pending = 0;
2514
2515 ECB_MEMORY_FENCE;
1308 2516
1309 for (i = EV_NSIG - 1; i--; ) 2517 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2518 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2519 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2520 }
2521#endif
1313 2522
1314#if EV_ASYNC_ENABLE 2523#if EV_ASYNC_ENABLE
1315 if (async_pending) 2524 if (async_pending)
1316 { 2525 {
1317 async_pending = 0; 2526 async_pending = 0;
2527
2528 ECB_MEMORY_FENCE;
1318 2529
1319 for (i = asynccnt; i--; ) 2530 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2531 if (asyncs [i]->sent)
1321 { 2532 {
1322 asyncs [i]->sent = 0; 2533 asyncs [i]->sent = 0;
2534 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2535 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2536 }
1325 } 2537 }
1326#endif 2538#endif
1327} 2539}
1328 2540
1329/*****************************************************************************/ 2541/*****************************************************************************/
1330 2542
2543void
2544ev_feed_signal (int signum) EV_THROW
2545{
2546#if EV_MULTIPLICITY
2547 EV_P;
2548 ECB_MEMORY_FENCE_ACQUIRE;
2549 EV_A = signals [signum - 1].loop;
2550
2551 if (!EV_A)
2552 return;
2553#endif
2554
2555 signals [signum - 1].pending = 1;
2556 evpipe_write (EV_A_ &sig_pending);
2557}
2558
1331static void 2559static void
1332ev_sighandler (int signum) 2560ev_sighandler (int signum)
1333{ 2561{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2562#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2563 signal (signum, ev_sighandler);
1340#endif 2564#endif
1341 2565
1342 signals [signum - 1].pending = 1; 2566 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2567}
1345 2568
1346void noinline 2569void noinline
1347ev_feed_signal_event (EV_P_ int signum) 2570ev_feed_signal_event (EV_P_ int signum) EV_THROW
1348{ 2571{
1349 WL w; 2572 WL w;
1350 2573
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2574 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2575 return;
1353 2576
1354 --signum; 2577 --signum;
1355 2578
1356#if EV_MULTIPLICITY 2579#if EV_MULTIPLICITY
… …
1360 if (expect_false (signals [signum].loop != EV_A)) 2583 if (expect_false (signals [signum].loop != EV_A))
1361 return; 2584 return;
1362#endif 2585#endif
1363 2586
1364 signals [signum].pending = 0; 2587 signals [signum].pending = 0;
2588 ECB_MEMORY_FENCE_RELEASE;
1365 2589
1366 for (w = signals [signum].head; w; w = w->next) 2590 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2591 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2592}
1369 2593
… …
1448 2672
1449#endif 2673#endif
1450 2674
1451/*****************************************************************************/ 2675/*****************************************************************************/
1452 2676
2677#if EV_USE_IOCP
2678# include "ev_iocp.c"
2679#endif
1453#if EV_USE_PORT 2680#if EV_USE_PORT
1454# include "ev_port.c" 2681# include "ev_port.c"
1455#endif 2682#endif
1456#if EV_USE_KQUEUE 2683#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2684# include "ev_kqueue.c"
… …
1464#endif 2691#endif
1465#if EV_USE_SELECT 2692#if EV_USE_SELECT
1466# include "ev_select.c" 2693# include "ev_select.c"
1467#endif 2694#endif
1468 2695
1469int 2696int ecb_cold
1470ev_version_major (void) 2697ev_version_major (void) EV_THROW
1471{ 2698{
1472 return EV_VERSION_MAJOR; 2699 return EV_VERSION_MAJOR;
1473} 2700}
1474 2701
1475int 2702int ecb_cold
1476ev_version_minor (void) 2703ev_version_minor (void) EV_THROW
1477{ 2704{
1478 return EV_VERSION_MINOR; 2705 return EV_VERSION_MINOR;
1479} 2706}
1480 2707
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2708/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2709int inline_size ecb_cold
1483enable_secure (void) 2710enable_secure (void)
1484{ 2711{
1485#ifdef _WIN32 2712#ifdef _WIN32
1486 return 0; 2713 return 0;
1487#else 2714#else
1488 return getuid () != geteuid () 2715 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2716 || getgid () != getegid ();
1490#endif 2717#endif
1491} 2718}
1492 2719
1493unsigned int 2720unsigned int ecb_cold
1494ev_supported_backends (void) 2721ev_supported_backends (void) EV_THROW
1495{ 2722{
1496 unsigned int flags = 0; 2723 unsigned int flags = 0;
1497 2724
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2725 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2726 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2729 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1503 2730
1504 return flags; 2731 return flags;
1505} 2732}
1506 2733
1507unsigned int 2734unsigned int ecb_cold
1508ev_recommended_backends (void) 2735ev_recommended_backends (void) EV_THROW
1509{ 2736{
1510 unsigned int flags = ev_supported_backends (); 2737 unsigned int flags = ev_supported_backends ();
1511 2738
1512#ifndef __NetBSD__ 2739#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2740 /* kqueue is borked on everything but netbsd apparently */
… …
1524#endif 2751#endif
1525 2752
1526 return flags; 2753 return flags;
1527} 2754}
1528 2755
2756unsigned int ecb_cold
2757ev_embeddable_backends (void) EV_THROW
2758{
2759 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2760
2761 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2762 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2763 flags &= ~EVBACKEND_EPOLL;
2764
2765 return flags;
2766}
2767
1529unsigned int 2768unsigned int
1530ev_embeddable_backends (void)
1531{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */
1536 flags &= ~EVBACKEND_EPOLL;
1537
1538 return flags;
1539}
1540
1541unsigned int
1542ev_backend (EV_P) 2769ev_backend (EV_P) EV_THROW
1543{ 2770{
1544 return backend; 2771 return backend;
1545} 2772}
1546 2773
1547#if EV_FEATURE_API 2774#if EV_FEATURE_API
1548unsigned int 2775unsigned int
1549ev_iteration (EV_P) 2776ev_iteration (EV_P) EV_THROW
1550{ 2777{
1551 return loop_count; 2778 return loop_count;
1552} 2779}
1553 2780
1554unsigned int 2781unsigned int
1555ev_depth (EV_P) 2782ev_depth (EV_P) EV_THROW
1556{ 2783{
1557 return loop_depth; 2784 return loop_depth;
1558} 2785}
1559 2786
1560void 2787void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2788ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1562{ 2789{
1563 io_blocktime = interval; 2790 io_blocktime = interval;
1564} 2791}
1565 2792
1566void 2793void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2794ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1568{ 2795{
1569 timeout_blocktime = interval; 2796 timeout_blocktime = interval;
1570} 2797}
1571 2798
1572void 2799void
1573ev_set_userdata (EV_P_ void *data) 2800ev_set_userdata (EV_P_ void *data) EV_THROW
1574{ 2801{
1575 userdata = data; 2802 userdata = data;
1576} 2803}
1577 2804
1578void * 2805void *
1579ev_userdata (EV_P) 2806ev_userdata (EV_P) EV_THROW
1580{ 2807{
1581 return userdata; 2808 return userdata;
1582} 2809}
1583 2810
2811void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2812ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1585{ 2813{
1586 invoke_cb = invoke_pending_cb; 2814 invoke_cb = invoke_pending_cb;
1587} 2815}
1588 2816
2817void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2818ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1590{ 2819{
1591 release_cb = release; 2820 release_cb = release;
1592 acquire_cb = acquire; 2821 acquire_cb = acquire;
1593} 2822}
1594#endif 2823#endif
1595 2824
1596/* initialise a loop structure, must be zero-initialised */ 2825/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2826static void noinline ecb_cold
1598loop_init (EV_P_ unsigned int flags) 2827loop_init (EV_P_ unsigned int flags) EV_THROW
1599{ 2828{
1600 if (!backend) 2829 if (!backend)
1601 { 2830 {
2831 origflags = flags;
2832
1602#if EV_USE_REALTIME 2833#if EV_USE_REALTIME
1603 if (!have_realtime) 2834 if (!have_realtime)
1604 { 2835 {
1605 struct timespec ts; 2836 struct timespec ts;
1606 2837
… …
1628 if (!(flags & EVFLAG_NOENV) 2859 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 2860 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 2861 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 2862 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 2863
1633 ev_rt_now = ev_time (); 2864 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 2865 mn_now = get_clock ();
1635 now_floor = mn_now; 2866 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 2867 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 2868#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 2869 invoke_cb = ev_invoke_pending;
1639#endif 2870#endif
1640 2871
1641 io_blocktime = 0.; 2872 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 2873 timeout_blocktime = 0.;
1643 backend = 0; 2874 backend = 0;
1644 backend_fd = -1; 2875 backend_fd = -1;
1645 sig_pending = 0; 2876 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 2877#if EV_ASYNC_ENABLE
1647 async_pending = 0; 2878 async_pending = 0;
1648#endif 2879#endif
2880 pipe_write_skipped = 0;
2881 pipe_write_wanted = 0;
2882 evpipe [0] = -1;
2883 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 2884#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2885 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 2886#endif
1652#if EV_USE_SIGNALFD 2887#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2888 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 2889#endif
1655 2890
1656 if (!(flags & 0x0000ffffU)) 2891 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 2892 flags |= ev_recommended_backends ();
1658 2893
2894#if EV_USE_IOCP
2895 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2896#endif
1659#if EV_USE_PORT 2897#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2898 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 2899#endif
1662#if EV_USE_KQUEUE 2900#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2901 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1680#endif 2918#endif
1681 } 2919 }
1682} 2920}
1683 2921
1684/* free up a loop structure */ 2922/* free up a loop structure */
1685static void noinline 2923void ecb_cold
1686loop_destroy (EV_P) 2924ev_loop_destroy (EV_P)
1687{ 2925{
1688 int i; 2926 int i;
2927
2928#if EV_MULTIPLICITY
2929 /* mimic free (0) */
2930 if (!EV_A)
2931 return;
2932#endif
2933
2934#if EV_CLEANUP_ENABLE
2935 /* queue cleanup watchers (and execute them) */
2936 if (expect_false (cleanupcnt))
2937 {
2938 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2939 EV_INVOKE_PENDING;
2940 }
2941#endif
2942
2943#if EV_CHILD_ENABLE
2944 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2945 {
2946 ev_ref (EV_A); /* child watcher */
2947 ev_signal_stop (EV_A_ &childev);
2948 }
2949#endif
1689 2950
1690 if (ev_is_active (&pipe_w)) 2951 if (ev_is_active (&pipe_w))
1691 { 2952 {
1692 /*ev_ref (EV_A);*/ 2953 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 2954 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 2955
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 2956 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 2957 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 2958 }
1706 2959
1707#if EV_USE_SIGNALFD 2960#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 2961 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 2962 close (sigfd);
… …
1715#endif 2968#endif
1716 2969
1717 if (backend_fd >= 0) 2970 if (backend_fd >= 0)
1718 close (backend_fd); 2971 close (backend_fd);
1719 2972
2973#if EV_USE_IOCP
2974 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2975#endif
1720#if EV_USE_PORT 2976#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2977 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 2978#endif
1723#if EV_USE_KQUEUE 2979#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2980 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1751 array_free (periodic, EMPTY); 3007 array_free (periodic, EMPTY);
1752#endif 3008#endif
1753#if EV_FORK_ENABLE 3009#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3010 array_free (fork, EMPTY);
1755#endif 3011#endif
3012#if EV_CLEANUP_ENABLE
3013 array_free (cleanup, EMPTY);
3014#endif
1756 array_free (prepare, EMPTY); 3015 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3016 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3017#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3018 array_free (async, EMPTY);
1760#endif 3019#endif
1761 3020
1762 backend = 0; 3021 backend = 0;
3022
3023#if EV_MULTIPLICITY
3024 if (ev_is_default_loop (EV_A))
3025#endif
3026 ev_default_loop_ptr = 0;
3027#if EV_MULTIPLICITY
3028 else
3029 ev_free (EV_A);
3030#endif
1763} 3031}
1764 3032
1765#if EV_USE_INOTIFY 3033#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3034inline_size void infy_fork (EV_P);
1767#endif 3035#endif
… …
1780#endif 3048#endif
1781#if EV_USE_INOTIFY 3049#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3050 infy_fork (EV_A);
1783#endif 3051#endif
1784 3052
3053#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3054 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3055 {
1787 /* this "locks" the handlers against writing to the pipe */ 3056 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 3057
1794 ev_ref (EV_A); 3058 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3059 ev_io_stop (EV_A_ &pipe_w);
1796 3060
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3061 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3062 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3063
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3064 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3065 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3066 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3067 }
3068#endif
1814 3069
1815 postfork = 0; 3070 postfork = 0;
1816} 3071}
1817 3072
1818#if EV_MULTIPLICITY 3073#if EV_MULTIPLICITY
1819 3074
1820struct ev_loop * 3075struct ev_loop * ecb_cold
1821ev_loop_new (unsigned int flags) 3076ev_loop_new (unsigned int flags) EV_THROW
1822{ 3077{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3078 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3079
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3080 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3081 loop_init (EV_A_ flags);
1827 3082
1828 if (ev_backend (EV_A)) 3083 if (ev_backend (EV_A))
1829 return EV_A; 3084 return EV_A;
1830 3085
3086 ev_free (EV_A);
1831 return 0; 3087 return 0;
1832} 3088}
1833 3089
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 3090#endif /* multiplicity */
1847 3091
1848#if EV_VERIFY 3092#if EV_VERIFY
1849static void noinline 3093static void noinline ecb_cold
1850verify_watcher (EV_P_ W w) 3094verify_watcher (EV_P_ W w)
1851{ 3095{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3096 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3097
1854 if (w->pending) 3098 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3099 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3100}
1857 3101
1858static void noinline 3102static void noinline ecb_cold
1859verify_heap (EV_P_ ANHE *heap, int N) 3103verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3104{
1861 int i; 3105 int i;
1862 3106
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3107 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3112
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3113 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3114 }
1871} 3115}
1872 3116
1873static void noinline 3117static void noinline ecb_cold
1874array_verify (EV_P_ W *ws, int cnt) 3118array_verify (EV_P_ W *ws, int cnt)
1875{ 3119{
1876 while (cnt--) 3120 while (cnt--)
1877 { 3121 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3122 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3124 }
1881} 3125}
1882#endif 3126#endif
1883 3127
1884#if EV_FEATURE_API 3128#if EV_FEATURE_API
1885void 3129void ecb_cold
1886ev_verify (EV_P) 3130ev_verify (EV_P) EV_THROW
1887{ 3131{
1888#if EV_VERIFY 3132#if EV_VERIFY
1889 int i; 3133 int i;
1890 WL w; 3134 WL w, w2;
1891 3135
1892 assert (activecnt >= -1); 3136 assert (activecnt >= -1);
1893 3137
1894 assert (fdchangemax >= fdchangecnt); 3138 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3139 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3140 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3141
1898 assert (anfdmax >= 0); 3142 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3143 for (i = 0; i < anfdmax; ++i)
3144 {
3145 int j = 0;
3146
1900 for (w = anfds [i].head; w; w = w->next) 3147 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3148 {
1902 verify_watcher (EV_A_ (W)w); 3149 verify_watcher (EV_A_ (W)w);
3150
3151 if (j++ & 1)
3152 {
3153 assert (("libev: io watcher list contains a loop", w != w2));
3154 w2 = w2->next;
3155 }
3156
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3157 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3158 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3159 }
3160 }
1906 3161
1907 assert (timermax >= timercnt); 3162 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3163 verify_heap (EV_A_ timers, timercnt);
1909 3164
1910#if EV_PERIODIC_ENABLE 3165#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3180#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3181 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3182 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3183#endif
1929 3184
3185#if EV_CLEANUP_ENABLE
3186 assert (cleanupmax >= cleanupcnt);
3187 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3188#endif
3189
1930#if EV_ASYNC_ENABLE 3190#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3191 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3192 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3193#endif
1934 3194
… …
1951#endif 3211#endif
1952} 3212}
1953#endif 3213#endif
1954 3214
1955#if EV_MULTIPLICITY 3215#if EV_MULTIPLICITY
1956struct ev_loop * 3216struct ev_loop * ecb_cold
1957ev_default_loop_init (unsigned int flags)
1958#else 3217#else
1959int 3218int
3219#endif
1960ev_default_loop (unsigned int flags) 3220ev_default_loop (unsigned int flags) EV_THROW
1961#endif
1962{ 3221{
1963 if (!ev_default_loop_ptr) 3222 if (!ev_default_loop_ptr)
1964 { 3223 {
1965#if EV_MULTIPLICITY 3224#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3225 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3244
1986 return ev_default_loop_ptr; 3245 return ev_default_loop_ptr;
1987} 3246}
1988 3247
1989void 3248void
1990ev_default_destroy (void) 3249ev_loop_fork (EV_P) EV_THROW
1991{ 3250{
1992#if EV_MULTIPLICITY 3251 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 3252}
2015 3253
2016/*****************************************************************************/ 3254/*****************************************************************************/
2017 3255
2018void 3256void
… …
2020{ 3258{
2021 EV_CB_INVOKE ((W)w, revents); 3259 EV_CB_INVOKE ((W)w, revents);
2022} 3260}
2023 3261
2024unsigned int 3262unsigned int
2025ev_pending_count (EV_P) 3263ev_pending_count (EV_P) EV_THROW
2026{ 3264{
2027 int pri; 3265 int pri;
2028 unsigned int count = 0; 3266 unsigned int count = 0;
2029 3267
2030 for (pri = NUMPRI; pri--; ) 3268 for (pri = NUMPRI; pri--; )
… …
2034} 3272}
2035 3273
2036void noinline 3274void noinline
2037ev_invoke_pending (EV_P) 3275ev_invoke_pending (EV_P)
2038{ 3276{
2039 int pri; 3277 pendingpri = NUMPRI;
2040 3278
2041 for (pri = NUMPRI; pri--; ) 3279 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3280 {
3281 --pendingpri;
3282
2042 while (pendingcnt [pri]) 3283 while (pendingcnt [pendingpri])
2043 { 3284 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3285 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3286
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 3287 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3288 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3289 EV_FREQUENT_CHECK;
2052 } 3290 }
3291 }
2053} 3292}
2054 3293
2055#if EV_IDLE_ENABLE 3294#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3295/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3296/* only when higher priorities are idle" logic */
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3353 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3354 }
2116} 3355}
2117 3356
2118#if EV_PERIODIC_ENABLE 3357#if EV_PERIODIC_ENABLE
3358
3359static void noinline
3360periodic_recalc (EV_P_ ev_periodic *w)
3361{
3362 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3363 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3364
3365 /* the above almost always errs on the low side */
3366 while (at <= ev_rt_now)
3367 {
3368 ev_tstamp nat = at + w->interval;
3369
3370 /* when resolution fails us, we use ev_rt_now */
3371 if (expect_false (nat == at))
3372 {
3373 at = ev_rt_now;
3374 break;
3375 }
3376
3377 at = nat;
3378 }
3379
3380 ev_at (w) = at;
3381}
3382
2119/* make periodics pending */ 3383/* make periodics pending */
2120inline_size void 3384inline_size void
2121periodics_reify (EV_P) 3385periodics_reify (EV_P)
2122{ 3386{
2123 EV_FREQUENT_CHECK; 3387 EV_FREQUENT_CHECK;
2124 3388
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3389 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3390 {
2127 int feed_count = 0;
2128
2129 do 3391 do
2130 { 3392 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3393 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3394
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3395 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3404 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3405 downheap (periodics, periodiccnt, HEAP0);
2144 } 3406 }
2145 else if (w->interval) 3407 else if (w->interval)
2146 { 3408 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3409 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 3410 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3411 downheap (periodics, periodiccnt, HEAP0);
2163 } 3412 }
2164 else 3413 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3414 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3422 }
2174} 3423}
2175 3424
2176/* simply recalculate all periodics */ 3425/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3426/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3427static void noinline ecb_cold
2179periodics_reschedule (EV_P) 3428periodics_reschedule (EV_P)
2180{ 3429{
2181 int i; 3430 int i;
2182 3431
2183 /* adjust periodics after time jump */ 3432 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3435 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3436
2188 if (w->reschedule_cb) 3437 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3438 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3439 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3440 periodic_recalc (EV_A_ w);
2192 3441
2193 ANHE_at_cache (periodics [i]); 3442 ANHE_at_cache (periodics [i]);
2194 } 3443 }
2195 3444
2196 reheap (periodics, periodiccnt); 3445 reheap (periodics, periodiccnt);
2197} 3446}
2198#endif 3447#endif
2199 3448
2200/* adjust all timers by a given offset */ 3449/* adjust all timers by a given offset */
2201static void noinline 3450static void noinline ecb_cold
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3451timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3452{
2204 int i; 3453 int i;
2205 3454
2206 for (i = 0; i < timercnt; ++i) 3455 for (i = 0; i < timercnt; ++i)
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3492 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3493 * in the unlikely event of having been preempted here.
2245 */ 3494 */
2246 for (i = 4; --i; ) 3495 for (i = 4; --i; )
2247 { 3496 {
3497 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3498 rtmn_diff = ev_rt_now - mn_now;
2249 3499
3500 diff = odiff - rtmn_diff;
3501
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3502 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3503 return; /* all is well */
2252 3504
2253 ev_rt_now = ev_time (); 3505 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3506 mn_now = get_clock ();
2255 now_floor = mn_now; 3507 now_floor = mn_now;
… …
2277 3529
2278 mn_now = ev_rt_now; 3530 mn_now = ev_rt_now;
2279 } 3531 }
2280} 3532}
2281 3533
2282void 3534int
2283ev_run (EV_P_ int flags) 3535ev_run (EV_P_ int flags)
2284{ 3536{
2285#if EV_FEATURE_API 3537#if EV_FEATURE_API
2286 ++loop_depth; 3538 ++loop_depth;
2287#endif 3539#endif
… …
2345 ev_tstamp prev_mn_now = mn_now; 3597 ev_tstamp prev_mn_now = mn_now;
2346 3598
2347 /* update time to cancel out callback processing overhead */ 3599 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3600 time_update (EV_A_ 1e100);
2349 3601
3602 /* from now on, we want a pipe-wake-up */
3603 pipe_write_wanted = 1;
3604
3605 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3606
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3607 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3608 {
2352 waittime = MAX_BLOCKTIME; 3609 waittime = MAX_BLOCKTIME;
2353 3610
2354 if (timercnt) 3611 if (timercnt)
2355 { 3612 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3613 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3614 if (waittime > to) waittime = to;
2358 } 3615 }
2359 3616
2360#if EV_PERIODIC_ENABLE 3617#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3618 if (periodiccnt)
2362 { 3619 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3620 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3621 if (waittime > to) waittime = to;
2365 } 3622 }
2366#endif 3623#endif
2367 3624
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3625 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3626 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3627 waittime = timeout_blocktime;
3628
3629 /* at this point, we NEED to wait, so we have to ensure */
3630 /* to pass a minimum nonzero value to the backend */
3631 if (expect_false (waittime < backend_mintime))
3632 waittime = backend_mintime;
2371 3633
2372 /* extra check because io_blocktime is commonly 0 */ 3634 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3635 if (expect_false (io_blocktime))
2374 { 3636 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3637 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3638
2377 if (sleeptime > waittime - backend_fudge) 3639 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3640 sleeptime = waittime - backend_mintime;
2379 3641
2380 if (expect_true (sleeptime > 0.)) 3642 if (expect_true (sleeptime > 0.))
2381 { 3643 {
2382 ev_sleep (sleeptime); 3644 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3645 waittime -= sleeptime;
… …
2390#endif 3652#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3653 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3654 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3655 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3656
3657 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3658
3659 ECB_MEMORY_FENCE_ACQUIRE;
3660 if (pipe_write_skipped)
3661 {
3662 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3663 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3664 }
3665
3666
2395 /* update ev_rt_now, do magic */ 3667 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3668 time_update (EV_A_ waittime + sleeptime);
2397 } 3669 }
2398 3670
2399 /* queue pending timers and reschedule them */ 3671 /* queue pending timers and reschedule them */
… …
2425 loop_done = EVBREAK_CANCEL; 3697 loop_done = EVBREAK_CANCEL;
2426 3698
2427#if EV_FEATURE_API 3699#if EV_FEATURE_API
2428 --loop_depth; 3700 --loop_depth;
2429#endif 3701#endif
3702
3703 return activecnt;
2430} 3704}
2431 3705
2432void 3706void
2433ev_break (EV_P_ int how) 3707ev_break (EV_P_ int how) EV_THROW
2434{ 3708{
2435 loop_done = how; 3709 loop_done = how;
2436} 3710}
2437 3711
2438void 3712void
2439ev_ref (EV_P) 3713ev_ref (EV_P) EV_THROW
2440{ 3714{
2441 ++activecnt; 3715 ++activecnt;
2442} 3716}
2443 3717
2444void 3718void
2445ev_unref (EV_P) 3719ev_unref (EV_P) EV_THROW
2446{ 3720{
2447 --activecnt; 3721 --activecnt;
2448} 3722}
2449 3723
2450void 3724void
2451ev_now_update (EV_P) 3725ev_now_update (EV_P) EV_THROW
2452{ 3726{
2453 time_update (EV_A_ 1e100); 3727 time_update (EV_A_ 1e100);
2454} 3728}
2455 3729
2456void 3730void
2457ev_suspend (EV_P) 3731ev_suspend (EV_P) EV_THROW
2458{ 3732{
2459 ev_now_update (EV_A); 3733 ev_now_update (EV_A);
2460} 3734}
2461 3735
2462void 3736void
2463ev_resume (EV_P) 3737ev_resume (EV_P) EV_THROW
2464{ 3738{
2465 ev_tstamp mn_prev = mn_now; 3739 ev_tstamp mn_prev = mn_now;
2466 3740
2467 ev_now_update (EV_A); 3741 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3742 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2507 w->pending = 0; 3781 w->pending = 0;
2508 } 3782 }
2509} 3783}
2510 3784
2511int 3785int
2512ev_clear_pending (EV_P_ void *w) 3786ev_clear_pending (EV_P_ void *w) EV_THROW
2513{ 3787{
2514 W w_ = (W)w; 3788 W w_ = (W)w;
2515 int pending = w_->pending; 3789 int pending = w_->pending;
2516 3790
2517 if (expect_true (pending)) 3791 if (expect_true (pending))
… …
2550} 3824}
2551 3825
2552/*****************************************************************************/ 3826/*****************************************************************************/
2553 3827
2554void noinline 3828void noinline
2555ev_io_start (EV_P_ ev_io *w) 3829ev_io_start (EV_P_ ev_io *w) EV_THROW
2556{ 3830{
2557 int fd = w->fd; 3831 int fd = w->fd;
2558 3832
2559 if (expect_false (ev_is_active (w))) 3833 if (expect_false (ev_is_active (w)))
2560 return; 3834 return;
… …
2566 3840
2567 ev_start (EV_A_ (W)w, 1); 3841 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3842 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2569 wlist_add (&anfds[fd].head, (WL)w); 3843 wlist_add (&anfds[fd].head, (WL)w);
2570 3844
3845 /* common bug, apparently */
3846 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3847
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3848 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 3849 w->events &= ~EV__IOFDSET;
2573 3850
2574 EV_FREQUENT_CHECK; 3851 EV_FREQUENT_CHECK;
2575} 3852}
2576 3853
2577void noinline 3854void noinline
2578ev_io_stop (EV_P_ ev_io *w) 3855ev_io_stop (EV_P_ ev_io *w) EV_THROW
2579{ 3856{
2580 clear_pending (EV_A_ (W)w); 3857 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 3858 if (expect_false (!ev_is_active (w)))
2582 return; 3859 return;
2583 3860
… …
2592 3869
2593 EV_FREQUENT_CHECK; 3870 EV_FREQUENT_CHECK;
2594} 3871}
2595 3872
2596void noinline 3873void noinline
2597ev_timer_start (EV_P_ ev_timer *w) 3874ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2598{ 3875{
2599 if (expect_false (ev_is_active (w))) 3876 if (expect_false (ev_is_active (w)))
2600 return; 3877 return;
2601 3878
2602 ev_at (w) += mn_now; 3879 ev_at (w) += mn_now;
… …
2616 3893
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3894 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 3895}
2619 3896
2620void noinline 3897void noinline
2621ev_timer_stop (EV_P_ ev_timer *w) 3898ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2622{ 3899{
2623 clear_pending (EV_A_ (W)w); 3900 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 3901 if (expect_false (!ev_is_active (w)))
2625 return; 3902 return;
2626 3903
… …
2646 3923
2647 EV_FREQUENT_CHECK; 3924 EV_FREQUENT_CHECK;
2648} 3925}
2649 3926
2650void noinline 3927void noinline
2651ev_timer_again (EV_P_ ev_timer *w) 3928ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2652{ 3929{
2653 EV_FREQUENT_CHECK; 3930 EV_FREQUENT_CHECK;
3931
3932 clear_pending (EV_A_ (W)w);
2654 3933
2655 if (ev_is_active (w)) 3934 if (ev_is_active (w))
2656 { 3935 {
2657 if (w->repeat) 3936 if (w->repeat)
2658 { 3937 {
… …
2671 3950
2672 EV_FREQUENT_CHECK; 3951 EV_FREQUENT_CHECK;
2673} 3952}
2674 3953
2675ev_tstamp 3954ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 3955ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2677{ 3956{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3957 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 3958}
2680 3959
2681#if EV_PERIODIC_ENABLE 3960#if EV_PERIODIC_ENABLE
2682void noinline 3961void noinline
2683ev_periodic_start (EV_P_ ev_periodic *w) 3962ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2684{ 3963{
2685 if (expect_false (ev_is_active (w))) 3964 if (expect_false (ev_is_active (w)))
2686 return; 3965 return;
2687 3966
2688 if (w->reschedule_cb) 3967 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3968 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 3969 else if (w->interval)
2691 { 3970 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3971 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 3972 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 3973 }
2696 else 3974 else
2697 ev_at (w) = w->offset; 3975 ev_at (w) = w->offset;
2698 3976
2699 EV_FREQUENT_CHECK; 3977 EV_FREQUENT_CHECK;
… …
2709 3987
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3988 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 3989}
2712 3990
2713void noinline 3991void noinline
2714ev_periodic_stop (EV_P_ ev_periodic *w) 3992ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2715{ 3993{
2716 clear_pending (EV_A_ (W)w); 3994 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 3995 if (expect_false (!ev_is_active (w)))
2718 return; 3996 return;
2719 3997
… …
2737 4015
2738 EV_FREQUENT_CHECK; 4016 EV_FREQUENT_CHECK;
2739} 4017}
2740 4018
2741void noinline 4019void noinline
2742ev_periodic_again (EV_P_ ev_periodic *w) 4020ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2743{ 4021{
2744 /* TODO: use adjustheap and recalculation */ 4022 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4023 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4024 ev_periodic_start (EV_A_ w);
2747} 4025}
… …
2752#endif 4030#endif
2753 4031
2754#if EV_SIGNAL_ENABLE 4032#if EV_SIGNAL_ENABLE
2755 4033
2756void noinline 4034void noinline
2757ev_signal_start (EV_P_ ev_signal *w) 4035ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2758{ 4036{
2759 if (expect_false (ev_is_active (w))) 4037 if (expect_false (ev_is_active (w)))
2760 return; 4038 return;
2761 4039
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4040 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2764#if EV_MULTIPLICITY 4042#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4043 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4044 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4045
2768 signals [w->signum - 1].loop = EV_A; 4046 signals [w->signum - 1].loop = EV_A;
4047 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4048#endif
2770 4049
2771 EV_FREQUENT_CHECK; 4050 EV_FREQUENT_CHECK;
2772 4051
2773#if EV_USE_SIGNALFD 4052#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4099 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4100 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4101 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4102 sigaction (w->signum, &sa, 0);
2824 4103
4104 if (origflags & EVFLAG_NOSIGMASK)
4105 {
2825 sigemptyset (&sa.sa_mask); 4106 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4107 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4108 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4109 }
2828#endif 4110#endif
2829 } 4111 }
2830 4112
2831 EV_FREQUENT_CHECK; 4113 EV_FREQUENT_CHECK;
2832} 4114}
2833 4115
2834void noinline 4116void noinline
2835ev_signal_stop (EV_P_ ev_signal *w) 4117ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2836{ 4118{
2837 clear_pending (EV_A_ (W)w); 4119 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4120 if (expect_false (!ev_is_active (w)))
2839 return; 4121 return;
2840 4122
… …
2871#endif 4153#endif
2872 4154
2873#if EV_CHILD_ENABLE 4155#if EV_CHILD_ENABLE
2874 4156
2875void 4157void
2876ev_child_start (EV_P_ ev_child *w) 4158ev_child_start (EV_P_ ev_child *w) EV_THROW
2877{ 4159{
2878#if EV_MULTIPLICITY 4160#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4161 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4162#endif
2881 if (expect_false (ev_is_active (w))) 4163 if (expect_false (ev_is_active (w)))
… …
2888 4170
2889 EV_FREQUENT_CHECK; 4171 EV_FREQUENT_CHECK;
2890} 4172}
2891 4173
2892void 4174void
2893ev_child_stop (EV_P_ ev_child *w) 4175ev_child_stop (EV_P_ ev_child *w) EV_THROW
2894{ 4176{
2895 clear_pending (EV_A_ (W)w); 4177 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4178 if (expect_false (!ev_is_active (w)))
2897 return; 4179 return;
2898 4180
… …
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4207# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4208
2927static void noinline 4209static void noinline
2928infy_add (EV_P_ ev_stat *w) 4210infy_add (EV_P_ ev_stat *w)
2929{ 4211{
2930 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4212 w->wd = inotify_add_watch (fs_fd, w->path,
4213 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4214 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4215 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4216
2932 if (w->wd >= 0) 4217 if (w->wd >= 0)
2933 { 4218 {
2934 struct statfs sfs; 4219 struct statfs sfs;
2935 4220
… …
2939 4224
2940 if (!fs_2625) 4225 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4226 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4227 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4228 && (sfs.f_type == 0x1373 /* devfs */
4229 || sfs.f_type == 0x4006 /* fat */
4230 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4231 || sfs.f_type == 0xEF53 /* ext2/3 */
4232 || sfs.f_type == 0x72b6 /* jffs2 */
4233 || sfs.f_type == 0x858458f6 /* ramfs */
4234 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4235 || sfs.f_type == 0x3153464a /* jfs */
4236 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4237 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4238 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4239 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4241 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4242 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4243 }
… …
2973 if (!pend || pend == path) 4264 if (!pend || pend == path)
2974 break; 4265 break;
2975 4266
2976 *pend = 0; 4267 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4268 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4269 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4270 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4271 }
2981 } 4272 }
2982 4273
2983 if (w->wd >= 0) 4274 if (w->wd >= 0)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4341 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4342 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4343 }
3053} 4344}
3054 4345
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 4346inline_size void ecb_cold
3088ev_check_2625 (EV_P) 4347ev_check_2625 (EV_P)
3089{ 4348{
3090 /* kernels < 2.6.25 are borked 4349 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4350 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4351 */
… …
3097} 4356}
3098 4357
3099inline_size int 4358inline_size int
3100infy_newfd (void) 4359infy_newfd (void)
3101{ 4360{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4361#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4363 if (fd >= 0)
3105 return fd; 4364 return fd;
3106#endif 4365#endif
3107 return inotify_init (); 4366 return inotify_init ();
… …
3182#else 4441#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4442# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4443#endif
3185 4444
3186void 4445void
3187ev_stat_stat (EV_P_ ev_stat *w) 4446ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3188{ 4447{
3189 if (lstat (w->path, &w->attr) < 0) 4448 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4449 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4450 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4451 w->attr.st_nlink = 1;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4490 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4491 }
3233} 4492}
3234 4493
3235void 4494void
3236ev_stat_start (EV_P_ ev_stat *w) 4495ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3237{ 4496{
3238 if (expect_false (ev_is_active (w))) 4497 if (expect_false (ev_is_active (w)))
3239 return; 4498 return;
3240 4499
3241 ev_stat_stat (EV_A_ w); 4500 ev_stat_stat (EV_A_ w);
… …
3262 4521
3263 EV_FREQUENT_CHECK; 4522 EV_FREQUENT_CHECK;
3264} 4523}
3265 4524
3266void 4525void
3267ev_stat_stop (EV_P_ ev_stat *w) 4526ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3268{ 4527{
3269 clear_pending (EV_A_ (W)w); 4528 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4529 if (expect_false (!ev_is_active (w)))
3271 return; 4530 return;
3272 4531
… …
3288} 4547}
3289#endif 4548#endif
3290 4549
3291#if EV_IDLE_ENABLE 4550#if EV_IDLE_ENABLE
3292void 4551void
3293ev_idle_start (EV_P_ ev_idle *w) 4552ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3294{ 4553{
3295 if (expect_false (ev_is_active (w))) 4554 if (expect_false (ev_is_active (w)))
3296 return; 4555 return;
3297 4556
3298 pri_adjust (EV_A_ (W)w); 4557 pri_adjust (EV_A_ (W)w);
… …
3311 4570
3312 EV_FREQUENT_CHECK; 4571 EV_FREQUENT_CHECK;
3313} 4572}
3314 4573
3315void 4574void
3316ev_idle_stop (EV_P_ ev_idle *w) 4575ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3317{ 4576{
3318 clear_pending (EV_A_ (W)w); 4577 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4578 if (expect_false (!ev_is_active (w)))
3320 return; 4579 return;
3321 4580
… …
3335} 4594}
3336#endif 4595#endif
3337 4596
3338#if EV_PREPARE_ENABLE 4597#if EV_PREPARE_ENABLE
3339void 4598void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4599ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3341{ 4600{
3342 if (expect_false (ev_is_active (w))) 4601 if (expect_false (ev_is_active (w)))
3343 return; 4602 return;
3344 4603
3345 EV_FREQUENT_CHECK; 4604 EV_FREQUENT_CHECK;
… …
3350 4609
3351 EV_FREQUENT_CHECK; 4610 EV_FREQUENT_CHECK;
3352} 4611}
3353 4612
3354void 4613void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4614ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3356{ 4615{
3357 clear_pending (EV_A_ (W)w); 4616 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4617 if (expect_false (!ev_is_active (w)))
3359 return; 4618 return;
3360 4619
… …
3373} 4632}
3374#endif 4633#endif
3375 4634
3376#if EV_CHECK_ENABLE 4635#if EV_CHECK_ENABLE
3377void 4636void
3378ev_check_start (EV_P_ ev_check *w) 4637ev_check_start (EV_P_ ev_check *w) EV_THROW
3379{ 4638{
3380 if (expect_false (ev_is_active (w))) 4639 if (expect_false (ev_is_active (w)))
3381 return; 4640 return;
3382 4641
3383 EV_FREQUENT_CHECK; 4642 EV_FREQUENT_CHECK;
… …
3388 4647
3389 EV_FREQUENT_CHECK; 4648 EV_FREQUENT_CHECK;
3390} 4649}
3391 4650
3392void 4651void
3393ev_check_stop (EV_P_ ev_check *w) 4652ev_check_stop (EV_P_ ev_check *w) EV_THROW
3394{ 4653{
3395 clear_pending (EV_A_ (W)w); 4654 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4655 if (expect_false (!ev_is_active (w)))
3397 return; 4656 return;
3398 4657
… …
3411} 4670}
3412#endif 4671#endif
3413 4672
3414#if EV_EMBED_ENABLE 4673#if EV_EMBED_ENABLE
3415void noinline 4674void noinline
3416ev_embed_sweep (EV_P_ ev_embed *w) 4675ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3417{ 4676{
3418 ev_run (w->other, EVRUN_NOWAIT); 4677 ev_run (w->other, EVRUN_NOWAIT);
3419} 4678}
3420 4679
3421static void 4680static void
… …
3469 ev_idle_stop (EV_A_ idle); 4728 ev_idle_stop (EV_A_ idle);
3470} 4729}
3471#endif 4730#endif
3472 4731
3473void 4732void
3474ev_embed_start (EV_P_ ev_embed *w) 4733ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3475{ 4734{
3476 if (expect_false (ev_is_active (w))) 4735 if (expect_false (ev_is_active (w)))
3477 return; 4736 return;
3478 4737
3479 { 4738 {
… …
3500 4759
3501 EV_FREQUENT_CHECK; 4760 EV_FREQUENT_CHECK;
3502} 4761}
3503 4762
3504void 4763void
3505ev_embed_stop (EV_P_ ev_embed *w) 4764ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3506{ 4765{
3507 clear_pending (EV_A_ (W)w); 4766 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4767 if (expect_false (!ev_is_active (w)))
3509 return; 4768 return;
3510 4769
… …
3520} 4779}
3521#endif 4780#endif
3522 4781
3523#if EV_FORK_ENABLE 4782#if EV_FORK_ENABLE
3524void 4783void
3525ev_fork_start (EV_P_ ev_fork *w) 4784ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3526{ 4785{
3527 if (expect_false (ev_is_active (w))) 4786 if (expect_false (ev_is_active (w)))
3528 return; 4787 return;
3529 4788
3530 EV_FREQUENT_CHECK; 4789 EV_FREQUENT_CHECK;
… …
3535 4794
3536 EV_FREQUENT_CHECK; 4795 EV_FREQUENT_CHECK;
3537} 4796}
3538 4797
3539void 4798void
3540ev_fork_stop (EV_P_ ev_fork *w) 4799ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3541{ 4800{
3542 clear_pending (EV_A_ (W)w); 4801 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 4802 if (expect_false (!ev_is_active (w)))
3544 return; 4803 return;
3545 4804
… …
3556 4815
3557 EV_FREQUENT_CHECK; 4816 EV_FREQUENT_CHECK;
3558} 4817}
3559#endif 4818#endif
3560 4819
4820#if EV_CLEANUP_ENABLE
4821void
4822ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4823{
4824 if (expect_false (ev_is_active (w)))
4825 return;
4826
4827 EV_FREQUENT_CHECK;
4828
4829 ev_start (EV_A_ (W)w, ++cleanupcnt);
4830 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4831 cleanups [cleanupcnt - 1] = w;
4832
4833 /* cleanup watchers should never keep a refcount on the loop */
4834 ev_unref (EV_A);
4835 EV_FREQUENT_CHECK;
4836}
4837
4838void
4839ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4840{
4841 clear_pending (EV_A_ (W)w);
4842 if (expect_false (!ev_is_active (w)))
4843 return;
4844
4845 EV_FREQUENT_CHECK;
4846 ev_ref (EV_A);
4847
4848 {
4849 int active = ev_active (w);
4850
4851 cleanups [active - 1] = cleanups [--cleanupcnt];
4852 ev_active (cleanups [active - 1]) = active;
4853 }
4854
4855 ev_stop (EV_A_ (W)w);
4856
4857 EV_FREQUENT_CHECK;
4858}
4859#endif
4860
3561#if EV_ASYNC_ENABLE 4861#if EV_ASYNC_ENABLE
3562void 4862void
3563ev_async_start (EV_P_ ev_async *w) 4863ev_async_start (EV_P_ ev_async *w) EV_THROW
3564{ 4864{
3565 if (expect_false (ev_is_active (w))) 4865 if (expect_false (ev_is_active (w)))
3566 return; 4866 return;
3567 4867
3568 w->sent = 0; 4868 w->sent = 0;
… …
3577 4877
3578 EV_FREQUENT_CHECK; 4878 EV_FREQUENT_CHECK;
3579} 4879}
3580 4880
3581void 4881void
3582ev_async_stop (EV_P_ ev_async *w) 4882ev_async_stop (EV_P_ ev_async *w) EV_THROW
3583{ 4883{
3584 clear_pending (EV_A_ (W)w); 4884 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 4885 if (expect_false (!ev_is_active (w)))
3586 return; 4886 return;
3587 4887
… …
3598 4898
3599 EV_FREQUENT_CHECK; 4899 EV_FREQUENT_CHECK;
3600} 4900}
3601 4901
3602void 4902void
3603ev_async_send (EV_P_ ev_async *w) 4903ev_async_send (EV_P_ ev_async *w) EV_THROW
3604{ 4904{
3605 w->sent = 1; 4905 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 4906 evpipe_write (EV_A_ &async_pending);
3607} 4907}
3608#endif 4908#endif
… …
3645 4945
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4946 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 4947}
3648 4948
3649void 4949void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4950ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3651{ 4951{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653 4953
3654 if (expect_false (!once)) 4954 if (expect_false (!once))
3655 { 4955 {
… …
3676} 4976}
3677 4977
3678/*****************************************************************************/ 4978/*****************************************************************************/
3679 4979
3680#if EV_WALK_ENABLE 4980#if EV_WALK_ENABLE
3681void 4981void ecb_cold
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4982ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3683{ 4983{
3684 int i, j; 4984 int i, j;
3685 ev_watcher_list *wl, *wn; 4985 ev_watcher_list *wl, *wn;
3686 4986
3687 if (types & (EV_IO | EV_EMBED)) 4987 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5031#endif
3732 5032
3733#if EV_IDLE_ENABLE 5033#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5034 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5035 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5036 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5037 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5038#endif
3739 5039
3740#if EV_FORK_ENABLE 5040#if EV_FORK_ENABLE
… …
3793 5093
3794#if EV_MULTIPLICITY 5094#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5095 #include "ev_wrap.h"
3796#endif 5096#endif
3797 5097
3798EV_CPP(})
3799

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