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Comparing libev/ev.c (file contents):
Revision 1.396 by root, Wed Aug 24 16:13:17 2011 UTC vs.
Revision 1.488 by root, Fri Dec 21 06:57:09 2018 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2018 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 *
… …
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 48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR 49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1 50# define EV_USE_FLOOR 1
51# endif
51# endif 52# endif
52#endif
53 53
54# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
59# endif 59# endif
60# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
62# endif 62# endif
63# endif 63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
66# endif 66# endif
67 67
68# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
162# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
163# endif 163# endif
164 164
165#endif 165#endif
166 166
167/* OS X, in its infinite idiocy, actually HARDCODES
168 * a limit of 1024 into their select. Where people have brains,
169 * OS X engineers apparently have a vacuum. Or maybe they were
170 * ordered to have a vacuum, or they do anything for money.
171 * This might help. Or not.
172 * Note that this must be defined early, as other include files
173 * will rely on this define as well.
174 */
175#define _DARWIN_UNLIMITED_SELECT 1
176
167#include <stdlib.h> 177#include <stdlib.h>
168#include <string.h> 178#include <string.h>
169#include <fcntl.h> 179#include <fcntl.h>
170#include <stddef.h> 180#include <stddef.h>
171 181
… …
183# include EV_H 193# include EV_H
184#else 194#else
185# include "ev.h" 195# include "ev.h"
186#endif 196#endif
187 197
188EV_CPP(extern "C" {) 198#if EV_NO_THREADS
199# undef EV_NO_SMP
200# define EV_NO_SMP 1
201# undef ECB_NO_THREADS
202# define ECB_NO_THREADS 1
203#endif
204#if EV_NO_SMP
205# undef EV_NO_SMP
206# define ECB_NO_SMP 1
207#endif
189 208
190#ifndef _WIN32 209#ifndef _WIN32
191# include <sys/time.h> 210# include <sys/time.h>
192# include <sys/wait.h> 211# include <sys/wait.h>
193# include <unistd.h> 212# include <unistd.h>
194#else 213#else
195# include <io.h> 214# include <io.h>
196# define WIN32_LEAN_AND_MEAN 215# define WIN32_LEAN_AND_MEAN
216# include <winsock2.h>
197# include <windows.h> 217# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET 218# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1 219# define EV_SELECT_IS_WINSOCKET 1
200# endif 220# endif
201# undef EV_AVOID_STDIO 221# undef EV_AVOID_STDIO
202#endif 222#endif
203 223
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */ 224/* this block tries to deduce configuration from header-defined symbols and defaults */
213 225
214/* try to deduce the maximum number of signals on this platform */ 226/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG) 227#if defined EV_NSIG
216/* use what's provided */ 228/* use what's provided */
217#elif defined (NSIG) 229#elif defined NSIG
218# define EV_NSIG (NSIG) 230# define EV_NSIG (NSIG)
219#elif defined(_NSIG) 231#elif defined _NSIG
220# define EV_NSIG (_NSIG) 232# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX) 233#elif defined SIGMAX
222# define EV_NSIG (SIGMAX+1) 234# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX) 235#elif defined SIG_MAX
224# define EV_NSIG (SIG_MAX+1) 236# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX) 237#elif defined _SIG_MAX
226# define EV_NSIG (_SIG_MAX+1) 238# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG) 239#elif defined MAXSIG
228# define EV_NSIG (MAXSIG+1) 240# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG) 241#elif defined MAX_SIG
230# define EV_NSIG (MAX_SIG+1) 242# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE) 243#elif defined SIGARRAYSIZE
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 244# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig) 245#elif defined _sys_nsig
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 246# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else 247#else
236# error "unable to find value for NSIG, please report" 248# define EV_NSIG (8 * sizeof (sigset_t) + 1)
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif 249#endif
241 250
242#ifndef EV_USE_FLOOR 251#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0 252# define EV_USE_FLOOR 0
244#endif 253#endif
245 254
246#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else 258# else
250# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
251# endif 260# endif
252#endif 261#endif
253 262
263#if !(_POSIX_TIMERS > 0)
264# ifndef EV_USE_MONOTONIC
265# define EV_USE_MONOTONIC 0
266# endif
267# ifndef EV_USE_REALTIME
268# define EV_USE_REALTIME 0
269# endif
270#endif
271
254#ifndef EV_USE_MONOTONIC 272#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 273# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS 274# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else 275# else
258# define EV_USE_MONOTONIC 0 276# define EV_USE_MONOTONIC 0
259# endif 277# endif
260#endif 278#endif
… …
347 365
348#ifndef EV_HEAP_CACHE_AT 366#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 367# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif 368#endif
351 369
370#ifdef __ANDROID__
371/* supposedly, android doesn't typedef fd_mask */
372# undef EV_USE_SELECT
373# define EV_USE_SELECT 0
374/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
375# undef EV_USE_CLOCK_SYSCALL
376# define EV_USE_CLOCK_SYSCALL 0
377#endif
378
379/* aix's poll.h seems to cause lots of trouble */
380#ifdef _AIX
381/* AIX has a completely broken poll.h header */
382# undef EV_USE_POLL
383# define EV_USE_POLL 0
384#endif
385
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 386/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */ 387/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL 388#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h> 389# include <sys/syscall.h>
356# ifdef SYS_clock_gettime 390# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 391# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1 393# define EV_USE_MONOTONIC 1
360# else 394# else
… …
363# endif 397# endif
364#endif 398#endif
365 399
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 400/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367 401
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC 402#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC 403# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0 404# define EV_USE_MONOTONIC 0
377#endif 405#endif
378 406
… …
386# define EV_USE_INOTIFY 0 414# define EV_USE_INOTIFY 0
387#endif 415#endif
388 416
389#if !EV_USE_NANOSLEEP 417#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */ 418/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux) 419# if !defined _WIN32 && !defined __hpux
392# include <sys/select.h> 420# include <sys/select.h>
393# endif 421# endif
394#endif 422#endif
395 423
396#if EV_USE_INOTIFY 424#if EV_USE_INOTIFY
… …
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 427/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW 428# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY 429# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0 430# define EV_USE_INOTIFY 0
403# endif 431# endif
404#endif
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif 432#endif
409 433
410#if EV_USE_EVENTFD 434#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 435/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h> 436# include <stdint.h>
… …
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 493/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */ 494/* ECB.H BEGIN */
471/* 495/*
472 * libecb - http://software.schmorp.de/pkg/libecb 496 * libecb - http://software.schmorp.de/pkg/libecb
473 * 497 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de> 498 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta 499 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved. 500 * All rights reserved.
477 * 501 *
478 * Redistribution and use in source and binary forms, with or without modifica- 502 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met: 503 * tion, are permitted provided that the following conditions are met:
… …
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 517 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 518 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 519 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 520 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE. 521 * OF THE POSSIBILITY OF SUCH DAMAGE.
522 *
523 * Alternatively, the contents of this file may be used under the terms of
524 * the GNU General Public License ("GPL") version 2 or any later version,
525 * in which case the provisions of the GPL are applicable instead of
526 * the above. If you wish to allow the use of your version of this file
527 * only under the terms of the GPL and not to allow others to use your
528 * version of this file under the BSD license, indicate your decision
529 * by deleting the provisions above and replace them with the notice
530 * and other provisions required by the GPL. If you do not delete the
531 * provisions above, a recipient may use your version of this file under
532 * either the BSD or the GPL.
498 */ 533 */
499 534
500#ifndef ECB_H 535#ifndef ECB_H
501#define ECB_H 536#define ECB_H
537
538/* 16 bits major, 16 bits minor */
539#define ECB_VERSION 0x00010005
502 540
503#ifdef _WIN32 541#ifdef _WIN32
504 typedef signed char int8_t; 542 typedef signed char int8_t;
505 typedef unsigned char uint8_t; 543 typedef unsigned char uint8_t;
506 typedef signed short int16_t; 544 typedef signed short int16_t;
… …
512 typedef unsigned long long uint64_t; 550 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */ 551 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t; 552 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t; 553 typedef unsigned __int64 uint64_t;
516 #endif 554 #endif
555 #ifdef _WIN64
556 #define ECB_PTRSIZE 8
557 typedef uint64_t uintptr_t;
558 typedef int64_t intptr_t;
559 #else
560 #define ECB_PTRSIZE 4
561 typedef uint32_t uintptr_t;
562 typedef int32_t intptr_t;
563 #endif
517#else 564#else
518 #include <inttypes.h> 565 #include <inttypes.h>
566 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
567 #define ECB_PTRSIZE 8
568 #else
569 #define ECB_PTRSIZE 4
570 #endif
571#endif
572
573#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
574#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
575
576/* work around x32 idiocy by defining proper macros */
577#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
578 #if _ILP32
579 #define ECB_AMD64_X32 1
580 #else
581 #define ECB_AMD64 1
582 #endif
519#endif 583#endif
520 584
521/* many compilers define _GNUC_ to some versions but then only implement 585/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions, 586 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers. 587 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so. 588 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have 589 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place. 590 * an issue with that they should have done it right in the first place.
527 */ 591 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 592#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
530 #define ECB_GCC_VERSION(major,minor) 0 593 #define ECB_GCC_VERSION(major,minor) 0
531 #else 594#else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 595 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
533 #endif 596#endif
597
598#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
599
600#if __clang__ && defined __has_builtin
601 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
602#else
603 #define ECB_CLANG_BUILTIN(x) 0
604#endif
605
606#if __clang__ && defined __has_extension
607 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
608#else
609 #define ECB_CLANG_EXTENSION(x) 0
610#endif
611
612#define ECB_CPP (__cplusplus+0)
613#define ECB_CPP11 (__cplusplus >= 201103L)
614#define ECB_CPP14 (__cplusplus >= 201402L)
615#define ECB_CPP17 (__cplusplus >= 201703L)
616
617#if ECB_CPP
618 #define ECB_C 0
619 #define ECB_STDC_VERSION 0
620#else
621 #define ECB_C 1
622 #define ECB_STDC_VERSION __STDC_VERSION__
623#endif
624
625#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
626#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
627#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
628
629#if ECB_CPP
630 #define ECB_EXTERN_C extern "C"
631 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
632 #define ECB_EXTERN_C_END }
633#else
634 #define ECB_EXTERN_C extern
635 #define ECB_EXTERN_C_BEG
636 #define ECB_EXTERN_C_END
534#endif 637#endif
535 638
536/*****************************************************************************/ 639/*****************************************************************************/
537 640
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 641/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 642/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540 643
541#if ECB_NO_THREADS || ECB_NO_SMP 644#if ECB_NO_THREADS
645 #define ECB_NO_SMP 1
646#endif
647
648#if ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0) 649 #define ECB_MEMORY_FENCE do { } while (0)
543#endif 650#endif
544 651
652/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
653#if __xlC__ && ECB_CPP
654 #include <builtins.h>
655#endif
656
657#if 1400 <= _MSC_VER
658 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
659#endif
660
545#ifndef ECB_MEMORY_FENCE 661#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5) 662 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
547 #if __i386__ 663 #if __i386 || __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 664 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 665 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
551 #elif __amd64 667 #elif ECB_GCC_AMD64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 669 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 670 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 671 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
673 #elif defined __ARM_ARCH_2__ \
674 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
675 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
676 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
677 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
678 || defined __ARM_ARCH_5TEJ__
679 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ 680 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) 681 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
682 || defined __ARM_ARCH_6T2__
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ 684 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 685 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 686 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
687 #elif __aarch64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
689 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
693 #elif defined __s390__ || defined __s390x__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
695 #elif defined __mips__
696 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
697 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
699 #elif defined __alpha__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
701 #elif defined __hppa__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
704 #elif defined __ia64__
705 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
706 #elif defined __m68k__
707 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
708 #elif defined __m88k__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
710 #elif defined __sh__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
563 #endif 712 #endif
564 #endif 713 #endif
565#endif 714#endif
566 715
567#ifndef ECB_MEMORY_FENCE 716#ifndef ECB_MEMORY_FENCE
717 #if ECB_GCC_VERSION(4,7)
718 /* see comment below (stdatomic.h) about the C11 memory model. */
719 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
720 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
721 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
722
723 #elif ECB_CLANG_EXTENSION(c_atomic)
724 /* see comment below (stdatomic.h) about the C11 memory model. */
725 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
726 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
727 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
728
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) 729 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
569 #define ECB_MEMORY_FENCE __sync_synchronize () 730 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 731 #elif _MSC_VER >= 1500 /* VC++ 2008 */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 732 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 737 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 738 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 739 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 740 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 741 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32) 742 #elif defined _WIN32
578 #include <WinNT.h> 743 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 744 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
745 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
746 #include <mbarrier.h>
747 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
748 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
749 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
750 #elif __xlC__
751 #define ECB_MEMORY_FENCE __sync ()
752 #endif
753#endif
754
755#ifndef ECB_MEMORY_FENCE
756 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
757 /* we assume that these memory fences work on all variables/all memory accesses, */
758 /* not just C11 atomics and atomic accesses */
759 #include <stdatomic.h>
760 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
761 /* any fence other than seq_cst, which isn't very efficient for us. */
762 /* Why that is, we don't know - either the C11 memory model is quite useless */
763 /* for most usages, or gcc and clang have a bug */
764 /* I *currently* lean towards the latter, and inefficiently implement */
765 /* all three of ecb's fences as a seq_cst fence */
766 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
767 /* for all __atomic_thread_fence's except seq_cst */
768 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
580 #endif 769 #endif
581#endif 770#endif
582 771
583#ifndef ECB_MEMORY_FENCE 772#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS 773 #if !ECB_AVOID_PTHREADS
… …
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 785 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) 786 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif 787 #endif
599#endif 788#endif
600 789
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) 790#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 791 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif 792#endif
604 793
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) 794#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 795 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif 796#endif
608 797
609/*****************************************************************************/ 798/*****************************************************************************/
610 799
611#define ECB_C99 (__STDC_VERSION__ >= 199901L) 800#if ECB_CPP
612
613#if __cplusplus
614 #define ecb_inline static inline 801 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5) 802#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__ 803 #define ecb_inline static __inline__
617#elif ECB_C99 804#elif ECB_C99
618 #define ecb_inline static inline 805 #define ecb_inline static inline
… …
632 819
633#define ECB_CONCAT_(a, b) a ## b 820#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 821#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a 822#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 823#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
824#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
637 825
638#define ecb_function_ ecb_inline 826#define ecb_function_ ecb_inline
639 827
640#if ECB_GCC_VERSION(3,1) 828#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
641 #define ecb_attribute(attrlist) __attribute__(attrlist) 829 #define ecb_attribute(attrlist) __attribute__ (attrlist)
830#else
831 #define ecb_attribute(attrlist)
832#endif
833
834#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr) 835 #define ecb_is_constant(expr) __builtin_constant_p (expr)
836#else
837 /* possible C11 impl for integral types
838 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
839 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
840
841 #define ecb_is_constant(expr) 0
842#endif
843
844#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 845 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
846#else
847 #define ecb_expect(expr,value) (expr)
848#endif
849
850#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 851 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else 852#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality) 853 #define ecb_prefetch(addr,rw,locality)
650#endif 854#endif
651 855
652/* no emulation for ecb_decltype */ 856/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5) 857#if ECB_CPP11
858 // older implementations might have problems with decltype(x)::type, work around it
859 template<class T> struct ecb_decltype_t { typedef T type; };
654 #define ecb_decltype(x) __decltype(x) 860 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
655#elif ECB_GCC_VERSION(3,0) 861#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
656 #define ecb_decltype(x) __typeof(x) 862 #define ecb_decltype(x) __typeof__ (x)
657#endif 863#endif
658 864
865#if _MSC_VER >= 1300
866 #define ecb_deprecated __declspec (deprecated)
867#else
868 #define ecb_deprecated ecb_attribute ((__deprecated__))
869#endif
870
871#if _MSC_VER >= 1500
872 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
873#elif ECB_GCC_VERSION(4,5)
874 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
875#else
876 #define ecb_deprecated_message(msg) ecb_deprecated
877#endif
878
879#if _MSC_VER >= 1400
880 #define ecb_noinline __declspec (noinline)
881#else
659#define ecb_noinline ecb_attribute ((__noinline__)) 882 #define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__)) 883#endif
884
661#define ecb_unused ecb_attribute ((__unused__)) 885#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__)) 886#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__)) 887#define ecb_pure ecb_attribute ((__pure__))
888
889#if ECB_C11 || __IBMC_NORETURN
890 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
891 #define ecb_noreturn _Noreturn
892#elif ECB_CPP11
893 #define ecb_noreturn [[noreturn]]
894#elif _MSC_VER >= 1200
895 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
896 #define ecb_noreturn __declspec (noreturn)
897#else
898 #define ecb_noreturn ecb_attribute ((__noreturn__))
899#endif
664 900
665#if ECB_GCC_VERSION(4,3) 901#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__)) 902 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__)) 903 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__)) 904 #define ecb_cold ecb_attribute ((__cold__))
… …
680/* for compatibility to the rest of the world */ 916/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr) 917#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr) 918#define ecb_unlikely(expr) ecb_expect_false (expr)
683 919
684/* count trailing zero bits and count # of one bits */ 920/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4) 921#if ECB_GCC_VERSION(3,4) \
922 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
923 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
924 && ECB_CLANG_BUILTIN(__builtin_popcount))
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 925 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 926 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 927 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x) 928 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x) 929 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x) 930 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */ 931 /* no popcountll */
693#else 932#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 933 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
695 ecb_function_ int 934 ecb_function_ ecb_const int
696 ecb_ctz32 (uint32_t x) 935 ecb_ctz32 (uint32_t x)
697 { 936 {
937#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
938 unsigned long r;
939 _BitScanForward (&r, x);
940 return (int)r;
941#else
698 int r = 0; 942 int r = 0;
699 943
700 x &= ~x + 1; /* this isolates the lowest bit */ 944 x &= ~x + 1; /* this isolates the lowest bit */
701 945
702#if ECB_branchless_on_i386 946#if ECB_branchless_on_i386
… …
712 if (x & 0xff00ff00) r += 8; 956 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16; 957 if (x & 0xffff0000) r += 16;
714#endif 958#endif
715 959
716 return r; 960 return r;
961#endif
717 } 962 }
718 963
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 964 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
720 ecb_function_ int 965 ecb_function_ ecb_const int
721 ecb_ctz64 (uint64_t x) 966 ecb_ctz64 (uint64_t x)
722 { 967 {
968#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
969 unsigned long r;
970 _BitScanForward64 (&r, x);
971 return (int)r;
972#else
723 int shift = x & 0xffffffffU ? 0 : 32; 973 int shift = x & 0xffffffff ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift; 974 return ecb_ctz32 (x >> shift) + shift;
975#endif
725 } 976 }
726 977
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 978 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
728 ecb_function_ int 979 ecb_function_ ecb_const int
729 ecb_popcount32 (uint32_t x) 980 ecb_popcount32 (uint32_t x)
730 { 981 {
731 x -= (x >> 1) & 0x55555555; 982 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 983 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f; 984 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101; 985 x *= 0x01010101;
735 986
736 return x >> 24; 987 return x >> 24;
737 } 988 }
738 989
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 990 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
740 ecb_function_ int ecb_ld32 (uint32_t x) 991 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
741 { 992 {
993#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanReverse (&r, x);
996 return (int)r;
997#else
742 int r = 0; 998 int r = 0;
743 999
744 if (x >> 16) { x >>= 16; r += 16; } 1000 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; } 1001 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; } 1002 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; } 1003 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; } 1004 if (x >> 1) { r += 1; }
749 1005
750 return r; 1006 return r;
1007#endif
751 } 1008 }
752 1009
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 1010 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
754 ecb_function_ int ecb_ld64 (uint64_t x) 1011 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
755 { 1012 {
1013#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1014 unsigned long r;
1015 _BitScanReverse64 (&r, x);
1016 return (int)r;
1017#else
756 int r = 0; 1018 int r = 0;
757 1019
758 if (x >> 32) { x >>= 32; r += 32; } 1020 if (x >> 32) { x >>= 32; r += 32; }
759 1021
760 return r + ecb_ld32 (x); 1022 return r + ecb_ld32 (x);
1023#endif
761 } 1024 }
762#endif 1025#endif
1026
1027ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1028ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1029ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1030ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1031
1032ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1033ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1034{
1035 return ( (x * 0x0802U & 0x22110U)
1036 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1037}
1038
1039ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1040ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1041{
1042 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1043 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1044 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1045 x = ( x >> 8 ) | ( x << 8);
1046
1047 return x;
1048}
1049
1050ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1051ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1052{
1053 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1054 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1055 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1056 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1057 x = ( x >> 16 ) | ( x << 16);
1058
1059 return x;
1060}
763 1061
764/* popcount64 is only available on 64 bit cpus as gcc builtin */ 1062/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */ 1063/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 1064ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
767ecb_function_ int 1065ecb_function_ ecb_const int
768ecb_popcount64 (uint64_t x) 1066ecb_popcount64 (uint64_t x)
769{ 1067{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 1068 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771} 1069}
772 1070
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 1071ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 1072ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 1073ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 1074ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 1075ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 1076ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 1077ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 1078ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
781 1079
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 1080ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 1081ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 1082ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 1083ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 1084ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 1085ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 1086ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 1087ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790 1088
791#if ECB_GCC_VERSION(4,3) 1089#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1090 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1091 #define ecb_bswap16(x) __builtin_bswap16 (x)
1092 #else
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1093 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1094 #endif
793 #define ecb_bswap32(x) __builtin_bswap32 (x) 1095 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x) 1096 #define ecb_bswap64(x) __builtin_bswap64 (x)
1097#elif _MSC_VER
1098 #include <stdlib.h>
1099 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1100 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1101 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
795#else 1102#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 1103 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
797 ecb_function_ uint16_t 1104 ecb_function_ ecb_const uint16_t
798 ecb_bswap16 (uint16_t x) 1105 ecb_bswap16 (uint16_t x)
799 { 1106 {
800 return ecb_rotl16 (x, 8); 1107 return ecb_rotl16 (x, 8);
801 } 1108 }
802 1109
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 1110 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
804 ecb_function_ uint32_t 1111 ecb_function_ ecb_const uint32_t
805 ecb_bswap32 (uint32_t x) 1112 ecb_bswap32 (uint32_t x)
806 { 1113 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 1114 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 } 1115 }
809 1116
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 1117 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
811 ecb_function_ uint64_t 1118 ecb_function_ ecb_const uint64_t
812 ecb_bswap64 (uint64_t x) 1119 ecb_bswap64 (uint64_t x)
813 { 1120 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 1121 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 } 1122 }
816#endif 1123#endif
817 1124
818#if ECB_GCC_VERSION(4,5) 1125#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
819 #define ecb_unreachable() __builtin_unreachable () 1126 #define ecb_unreachable() __builtin_unreachable ()
820#else 1127#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */ 1128 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 1129 ecb_inline ecb_noreturn void ecb_unreachable (void);
823 ecb_function_ void ecb_unreachable (void) { } 1130 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
824#endif 1131#endif
825 1132
826/* try to tell the compiler that some condition is definitely true */ 1133/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 1134#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
828 1135
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 1136ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
830ecb_function_ unsigned char 1137ecb_inline ecb_const uint32_t
831ecb_byteorder_helper (void) 1138ecb_byteorder_helper (void)
832{ 1139{
833 const uint32_t u = 0x11223344; 1140 /* the union code still generates code under pressure in gcc, */
834 return *(unsigned char *)&u; 1141 /* but less than using pointers, and always seems to */
1142 /* successfully return a constant. */
1143 /* the reason why we have this horrible preprocessor mess */
1144 /* is to avoid it in all cases, at least on common architectures */
1145 /* or when using a recent enough gcc version (>= 4.6) */
1146#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1147 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1148 #define ECB_LITTLE_ENDIAN 1
1149 return 0x44332211;
1150#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1151 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1152 #define ECB_BIG_ENDIAN 1
1153 return 0x11223344;
1154#else
1155 union
1156 {
1157 uint8_t c[4];
1158 uint32_t u;
1159 } u = { 0x11, 0x22, 0x33, 0x44 };
1160 return u.u;
1161#endif
835} 1162}
836 1163
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 1164ecb_inline ecb_const ecb_bool ecb_big_endian (void);
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 1165ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 1166ecb_inline ecb_const ecb_bool ecb_little_endian (void);
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 1167ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
841 1168
842#if ECB_GCC_VERSION(3,0) || ECB_C99 1169#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 1170 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else 1171#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 1172 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1173#endif
1174
1175#if ECB_CPP
1176 template<typename T>
1177 static inline T ecb_div_rd (T val, T div)
1178 {
1179 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1180 }
1181 template<typename T>
1182 static inline T ecb_div_ru (T val, T div)
1183 {
1184 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1185 }
1186#else
1187 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1188 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
846#endif 1189#endif
847 1190
848#if ecb_cplusplus_does_not_suck 1191#if ecb_cplusplus_does_not_suck
849 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ 1192 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
850 template<typename T, int N> 1193 template<typename T, int N>
… …
854 } 1197 }
855#else 1198#else
856 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1199 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
857#endif 1200#endif
858 1201
1202ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1203ecb_function_ ecb_const uint32_t
1204ecb_binary16_to_binary32 (uint32_t x)
1205{
1206 unsigned int s = (x & 0x8000) << (31 - 15);
1207 int e = (x >> 10) & 0x001f;
1208 unsigned int m = x & 0x03ff;
1209
1210 if (ecb_expect_false (e == 31))
1211 /* infinity or NaN */
1212 e = 255 - (127 - 15);
1213 else if (ecb_expect_false (!e))
1214 {
1215 if (ecb_expect_true (!m))
1216 /* zero, handled by code below by forcing e to 0 */
1217 e = 0 - (127 - 15);
1218 else
1219 {
1220 /* subnormal, renormalise */
1221 unsigned int s = 10 - ecb_ld32 (m);
1222
1223 m = (m << s) & 0x3ff; /* mask implicit bit */
1224 e -= s - 1;
1225 }
1226 }
1227
1228 /* e and m now are normalised, or zero, (or inf or nan) */
1229 e += 127 - 15;
1230
1231 return s | (e << 23) | (m << (23 - 10));
1232}
1233
1234ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1235ecb_function_ ecb_const uint16_t
1236ecb_binary32_to_binary16 (uint32_t x)
1237{
1238 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1239 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1240 unsigned int m = x & 0x007fffff;
1241
1242 x &= 0x7fffffff;
1243
1244 /* if it's within range of binary16 normals, use fast path */
1245 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1246 {
1247 /* mantissa round-to-even */
1248 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1249
1250 /* handle overflow */
1251 if (ecb_expect_false (m >= 0x00800000))
1252 {
1253 m >>= 1;
1254 e += 1;
1255 }
1256
1257 return s | (e << 10) | (m >> (23 - 10));
1258 }
1259
1260 /* handle large numbers and infinity */
1261 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1262 return s | 0x7c00;
1263
1264 /* handle zero, subnormals and small numbers */
1265 if (ecb_expect_true (x < 0x38800000))
1266 {
1267 /* zero */
1268 if (ecb_expect_true (!x))
1269 return s;
1270
1271 /* handle subnormals */
1272
1273 /* too small, will be zero */
1274 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1275 return s;
1276
1277 m |= 0x00800000; /* make implicit bit explicit */
1278
1279 /* very tricky - we need to round to the nearest e (+10) bit value */
1280 {
1281 unsigned int bits = 14 - e;
1282 unsigned int half = (1 << (bits - 1)) - 1;
1283 unsigned int even = (m >> bits) & 1;
1284
1285 /* if this overflows, we will end up with a normalised number */
1286 m = (m + half + even) >> bits;
1287 }
1288
1289 return s | m;
1290 }
1291
1292 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1293 m >>= 13;
1294
1295 return s | 0x7c00 | m | !m;
1296}
1297
1298/*******************************************************************************/
1299/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1300
1301/* basically, everything uses "ieee pure-endian" floating point numbers */
1302/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1303#if 0 \
1304 || __i386 || __i386__ \
1305 || ECB_GCC_AMD64 \
1306 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1307 || defined __s390__ || defined __s390x__ \
1308 || defined __mips__ \
1309 || defined __alpha__ \
1310 || defined __hppa__ \
1311 || defined __ia64__ \
1312 || defined __m68k__ \
1313 || defined __m88k__ \
1314 || defined __sh__ \
1315 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1316 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1317 || defined __aarch64__
1318 #define ECB_STDFP 1
1319 #include <string.h> /* for memcpy */
1320#else
1321 #define ECB_STDFP 0
1322#endif
1323
1324#ifndef ECB_NO_LIBM
1325
1326 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1327
1328 /* only the oldest of old doesn't have this one. solaris. */
1329 #ifdef INFINITY
1330 #define ECB_INFINITY INFINITY
1331 #else
1332 #define ECB_INFINITY HUGE_VAL
1333 #endif
1334
1335 #ifdef NAN
1336 #define ECB_NAN NAN
1337 #else
1338 #define ECB_NAN ECB_INFINITY
1339 #endif
1340
1341 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1342 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1343 #define ecb_frexpf(x,e) frexpf ((x), (e))
1344 #else
1345 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1346 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1347 #endif
1348
1349 /* convert a float to ieee single/binary32 */
1350 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1351 ecb_function_ ecb_const uint32_t
1352 ecb_float_to_binary32 (float x)
1353 {
1354 uint32_t r;
1355
1356 #if ECB_STDFP
1357 memcpy (&r, &x, 4);
1358 #else
1359 /* slow emulation, works for anything but -0 */
1360 uint32_t m;
1361 int e;
1362
1363 if (x == 0e0f ) return 0x00000000U;
1364 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1365 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1366 if (x != x ) return 0x7fbfffffU;
1367
1368 m = ecb_frexpf (x, &e) * 0x1000000U;
1369
1370 r = m & 0x80000000U;
1371
1372 if (r)
1373 m = -m;
1374
1375 if (e <= -126)
1376 {
1377 m &= 0xffffffU;
1378 m >>= (-125 - e);
1379 e = -126;
1380 }
1381
1382 r |= (e + 126) << 23;
1383 r |= m & 0x7fffffU;
1384 #endif
1385
1386 return r;
1387 }
1388
1389 /* converts an ieee single/binary32 to a float */
1390 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1391 ecb_function_ ecb_const float
1392 ecb_binary32_to_float (uint32_t x)
1393 {
1394 float r;
1395
1396 #if ECB_STDFP
1397 memcpy (&r, &x, 4);
1398 #else
1399 /* emulation, only works for normals and subnormals and +0 */
1400 int neg = x >> 31;
1401 int e = (x >> 23) & 0xffU;
1402
1403 x &= 0x7fffffU;
1404
1405 if (e)
1406 x |= 0x800000U;
1407 else
1408 e = 1;
1409
1410 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1411 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1412
1413 r = neg ? -r : r;
1414 #endif
1415
1416 return r;
1417 }
1418
1419 /* convert a double to ieee double/binary64 */
1420 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1421 ecb_function_ ecb_const uint64_t
1422 ecb_double_to_binary64 (double x)
1423 {
1424 uint64_t r;
1425
1426 #if ECB_STDFP
1427 memcpy (&r, &x, 8);
1428 #else
1429 /* slow emulation, works for anything but -0 */
1430 uint64_t m;
1431 int e;
1432
1433 if (x == 0e0 ) return 0x0000000000000000U;
1434 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1435 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1436 if (x != x ) return 0X7ff7ffffffffffffU;
1437
1438 m = frexp (x, &e) * 0x20000000000000U;
1439
1440 r = m & 0x8000000000000000;;
1441
1442 if (r)
1443 m = -m;
1444
1445 if (e <= -1022)
1446 {
1447 m &= 0x1fffffffffffffU;
1448 m >>= (-1021 - e);
1449 e = -1022;
1450 }
1451
1452 r |= ((uint64_t)(e + 1022)) << 52;
1453 r |= m & 0xfffffffffffffU;
1454 #endif
1455
1456 return r;
1457 }
1458
1459 /* converts an ieee double/binary64 to a double */
1460 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1461 ecb_function_ ecb_const double
1462 ecb_binary64_to_double (uint64_t x)
1463 {
1464 double r;
1465
1466 #if ECB_STDFP
1467 memcpy (&r, &x, 8);
1468 #else
1469 /* emulation, only works for normals and subnormals and +0 */
1470 int neg = x >> 63;
1471 int e = (x >> 52) & 0x7ffU;
1472
1473 x &= 0xfffffffffffffU;
1474
1475 if (e)
1476 x |= 0x10000000000000U;
1477 else
1478 e = 1;
1479
1480 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1481 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1482
1483 r = neg ? -r : r;
1484 #endif
1485
1486 return r;
1487 }
1488
1489 /* convert a float to ieee half/binary16 */
1490 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1491 ecb_function_ ecb_const uint16_t
1492 ecb_float_to_binary16 (float x)
1493 {
1494 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1495 }
1496
1497 /* convert an ieee half/binary16 to float */
1498 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1499 ecb_function_ ecb_const float
1500 ecb_binary16_to_float (uint16_t x)
1501 {
1502 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1503 }
1504
1505#endif
1506
859#endif 1507#endif
860 1508
861/* ECB.H END */ 1509/* ECB.H END */
862 1510
863#if ECB_MEMORY_FENCE_NEEDS_PTHREADS 1511#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
864/* if your architetcure doesn't need memory fences, e.g. because it is 1512/* if your architecture doesn't need memory fences, e.g. because it is
865 * single-cpu/core, or if you use libev in a project that doesn't use libev 1513 * single-cpu/core, or if you use libev in a project that doesn't use libev
866 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling 1514 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
867 * libev, in which casess the memory fences become nops. 1515 * libev, in which cases the memory fences become nops.
868 * alternatively, you can remove this #error and link against libpthread, 1516 * alternatively, you can remove this #error and link against libpthread,
869 * which will then provide the memory fences. 1517 * which will then provide the memory fences.
870 */ 1518 */
871# error "memory fences not defined for your architecture, please report" 1519# error "memory fences not defined for your architecture, please report"
872#endif 1520#endif
… …
884#define inline_size ecb_inline 1532#define inline_size ecb_inline
885 1533
886#if EV_FEATURE_CODE 1534#if EV_FEATURE_CODE
887# define inline_speed ecb_inline 1535# define inline_speed ecb_inline
888#else 1536#else
889# define inline_speed static noinline 1537# define inline_speed noinline static
890#endif 1538#endif
891 1539
892#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1540#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
893 1541
894#if EV_MINPRI == EV_MAXPRI 1542#if EV_MINPRI == EV_MAXPRI
… …
941#else 1589#else
942 1590
943#include <float.h> 1591#include <float.h>
944 1592
945/* a floor() replacement function, should be independent of ev_tstamp type */ 1593/* a floor() replacement function, should be independent of ev_tstamp type */
1594noinline
946static ev_tstamp noinline 1595static ev_tstamp
947ev_floor (ev_tstamp v) 1596ev_floor (ev_tstamp v)
948{ 1597{
949 /* the choice of shift factor is not terribly important */ 1598 /* the choice of shift factor is not terribly important */
950#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1599#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
951 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1600 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
… …
983 1632
984#ifdef __linux 1633#ifdef __linux
985# include <sys/utsname.h> 1634# include <sys/utsname.h>
986#endif 1635#endif
987 1636
988static unsigned int noinline ecb_cold 1637noinline ecb_cold
1638static unsigned int
989ev_linux_version (void) 1639ev_linux_version (void)
990{ 1640{
991#ifdef __linux 1641#ifdef __linux
992 unsigned int v = 0; 1642 unsigned int v = 0;
993 struct utsname buf; 1643 struct utsname buf;
… …
1022} 1672}
1023 1673
1024/*****************************************************************************/ 1674/*****************************************************************************/
1025 1675
1026#if EV_AVOID_STDIO 1676#if EV_AVOID_STDIO
1027static void noinline ecb_cold 1677noinline ecb_cold
1678static void
1028ev_printerr (const char *msg) 1679ev_printerr (const char *msg)
1029{ 1680{
1030 write (STDERR_FILENO, msg, strlen (msg)); 1681 write (STDERR_FILENO, msg, strlen (msg));
1031} 1682}
1032#endif 1683#endif
1033 1684
1034static void (*syserr_cb)(const char *msg); 1685static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
1035 1686
1036void ecb_cold 1687ecb_cold
1688void
1037ev_set_syserr_cb (void (*cb)(const char *msg)) 1689ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
1038{ 1690{
1039 syserr_cb = cb; 1691 syserr_cb = cb;
1040} 1692}
1041 1693
1042static void noinline ecb_cold 1694noinline ecb_cold
1695static void
1043ev_syserr (const char *msg) 1696ev_syserr (const char *msg)
1044{ 1697{
1045 if (!msg) 1698 if (!msg)
1046 msg = "(libev) system error"; 1699 msg = "(libev) system error";
1047 1700
… …
1060 abort (); 1713 abort ();
1061 } 1714 }
1062} 1715}
1063 1716
1064static void * 1717static void *
1065ev_realloc_emul (void *ptr, long size) 1718ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
1066{ 1719{
1067#if __GLIBC__
1068 return realloc (ptr, size);
1069#else
1070 /* some systems, notably openbsd and darwin, fail to properly 1720 /* some systems, notably openbsd and darwin, fail to properly
1071 * implement realloc (x, 0) (as required by both ansi c-89 and 1721 * implement realloc (x, 0) (as required by both ansi c-89 and
1072 * the single unix specification, so work around them here. 1722 * the single unix specification, so work around them here.
1723 * recently, also (at least) fedora and debian started breaking it,
1724 * despite documenting it otherwise.
1073 */ 1725 */
1074 1726
1075 if (size) 1727 if (size)
1076 return realloc (ptr, size); 1728 return realloc (ptr, size);
1077 1729
1078 free (ptr); 1730 free (ptr);
1079 return 0; 1731 return 0;
1080#endif
1081} 1732}
1082 1733
1083static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1734static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
1084 1735
1085void ecb_cold 1736ecb_cold
1737void
1086ev_set_allocator (void *(*cb)(void *ptr, long size)) 1738ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
1087{ 1739{
1088 alloc = cb; 1740 alloc = cb;
1089} 1741}
1090 1742
1091inline_speed void * 1743inline_speed void *
… …
1179 #undef VAR 1831 #undef VAR
1180 }; 1832 };
1181 #include "ev_wrap.h" 1833 #include "ev_wrap.h"
1182 1834
1183 static struct ev_loop default_loop_struct; 1835 static struct ev_loop default_loop_struct;
1184 struct ev_loop *ev_default_loop_ptr; 1836 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1185 1837
1186#else 1838#else
1187 1839
1188 ev_tstamp ev_rt_now; 1840 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1189 #define VAR(name,decl) static decl; 1841 #define VAR(name,decl) static decl;
1190 #include "ev_vars.h" 1842 #include "ev_vars.h"
1191 #undef VAR 1843 #undef VAR
1192 1844
1193 static int ev_default_loop_ptr; 1845 static int ev_default_loop_ptr;
… …
1208 1860
1209/*****************************************************************************/ 1861/*****************************************************************************/
1210 1862
1211#ifndef EV_HAVE_EV_TIME 1863#ifndef EV_HAVE_EV_TIME
1212ev_tstamp 1864ev_tstamp
1213ev_time (void) 1865ev_time (void) EV_NOEXCEPT
1214{ 1866{
1215#if EV_USE_REALTIME 1867#if EV_USE_REALTIME
1216 if (expect_true (have_realtime)) 1868 if (expect_true (have_realtime))
1217 { 1869 {
1218 struct timespec ts; 1870 struct timespec ts;
… …
1242 return ev_time (); 1894 return ev_time ();
1243} 1895}
1244 1896
1245#if EV_MULTIPLICITY 1897#if EV_MULTIPLICITY
1246ev_tstamp 1898ev_tstamp
1247ev_now (EV_P) 1899ev_now (EV_P) EV_NOEXCEPT
1248{ 1900{
1249 return ev_rt_now; 1901 return ev_rt_now;
1250} 1902}
1251#endif 1903#endif
1252 1904
1253void 1905void
1254ev_sleep (ev_tstamp delay) 1906ev_sleep (ev_tstamp delay) EV_NOEXCEPT
1255{ 1907{
1256 if (delay > 0.) 1908 if (delay > 0.)
1257 { 1909 {
1258#if EV_USE_NANOSLEEP 1910#if EV_USE_NANOSLEEP
1259 struct timespec ts; 1911 struct timespec ts;
1260 1912
1261 EV_TS_SET (ts, delay); 1913 EV_TS_SET (ts, delay);
1262 nanosleep (&ts, 0); 1914 nanosleep (&ts, 0);
1263#elif defined(_WIN32) 1915#elif defined _WIN32
1916 /* maybe this should round up, as ms is very low resolution */
1917 /* compared to select (µs) or nanosleep (ns) */
1264 Sleep ((unsigned long)(delay * 1e3)); 1918 Sleep ((unsigned long)(delay * 1e3));
1265#else 1919#else
1266 struct timeval tv; 1920 struct timeval tv;
1267 1921
1268 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1922 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
1287 1941
1288 do 1942 do
1289 ncur <<= 1; 1943 ncur <<= 1;
1290 while (cnt > ncur); 1944 while (cnt > ncur);
1291 1945
1292 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1946 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1293 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1947 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1294 { 1948 {
1295 ncur *= elem; 1949 ncur *= elem;
1296 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1950 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1297 ncur = ncur - sizeof (void *) * 4; 1951 ncur = ncur - sizeof (void *) * 4;
… …
1299 } 1953 }
1300 1954
1301 return ncur; 1955 return ncur;
1302} 1956}
1303 1957
1304static void * noinline ecb_cold 1958noinline ecb_cold
1959static void *
1305array_realloc (int elem, void *base, int *cur, int cnt) 1960array_realloc (int elem, void *base, int *cur, int cnt)
1306{ 1961{
1307 *cur = array_nextsize (elem, *cur, cnt); 1962 *cur = array_nextsize (elem, *cur, cnt);
1308 return ev_realloc (base, elem * *cur); 1963 return ev_realloc (base, elem * *cur);
1309} 1964}
… …
1312 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1967 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1313 1968
1314#define array_needsize(type,base,cur,cnt,init) \ 1969#define array_needsize(type,base,cur,cnt,init) \
1315 if (expect_false ((cnt) > (cur))) \ 1970 if (expect_false ((cnt) > (cur))) \
1316 { \ 1971 { \
1317 int ecb_unused ocur_ = (cur); \ 1972 ecb_unused int ocur_ = (cur); \
1318 (base) = (type *)array_realloc \ 1973 (base) = (type *)array_realloc \
1319 (sizeof (type), (base), &(cur), (cnt)); \ 1974 (sizeof (type), (base), &(cur), (cnt)); \
1320 init ((base) + (ocur_), (cur) - ocur_); \ 1975 init ((base) + (ocur_), (cur) - ocur_); \
1321 } 1976 }
1322 1977
… …
1334 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1989 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1335 1990
1336/*****************************************************************************/ 1991/*****************************************************************************/
1337 1992
1338/* dummy callback for pending events */ 1993/* dummy callback for pending events */
1339static void noinline 1994noinline
1995static void
1340pendingcb (EV_P_ ev_prepare *w, int revents) 1996pendingcb (EV_P_ ev_prepare *w, int revents)
1341{ 1997{
1342} 1998}
1343 1999
1344void noinline 2000noinline
2001void
1345ev_feed_event (EV_P_ void *w, int revents) 2002ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
1346{ 2003{
1347 W w_ = (W)w; 2004 W w_ = (W)w;
1348 int pri = ABSPRI (w_); 2005 int pri = ABSPRI (w_);
1349 2006
1350 if (expect_false (w_->pending)) 2007 if (expect_false (w_->pending))
… …
1354 w_->pending = ++pendingcnt [pri]; 2011 w_->pending = ++pendingcnt [pri];
1355 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2012 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1356 pendings [pri][w_->pending - 1].w = w_; 2013 pendings [pri][w_->pending - 1].w = w_;
1357 pendings [pri][w_->pending - 1].events = revents; 2014 pendings [pri][w_->pending - 1].events = revents;
1358 } 2015 }
2016
2017 pendingpri = NUMPRI - 1;
1359} 2018}
1360 2019
1361inline_speed void 2020inline_speed void
1362feed_reverse (EV_P_ W w) 2021feed_reverse (EV_P_ W w)
1363{ 2022{
… …
1409 if (expect_true (!anfd->reify)) 2068 if (expect_true (!anfd->reify))
1410 fd_event_nocheck (EV_A_ fd, revents); 2069 fd_event_nocheck (EV_A_ fd, revents);
1411} 2070}
1412 2071
1413void 2072void
1414ev_feed_fd_event (EV_P_ int fd, int revents) 2073ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1415{ 2074{
1416 if (fd >= 0 && fd < anfdmax) 2075 if (fd >= 0 && fd < anfdmax)
1417 fd_event_nocheck (EV_A_ fd, revents); 2076 fd_event_nocheck (EV_A_ fd, revents);
1418} 2077}
1419 2078
… …
1477 2136
1478 fdchangecnt = 0; 2137 fdchangecnt = 0;
1479} 2138}
1480 2139
1481/* something about the given fd changed */ 2140/* something about the given fd changed */
1482inline_size void 2141inline_size
2142void
1483fd_change (EV_P_ int fd, int flags) 2143fd_change (EV_P_ int fd, int flags)
1484{ 2144{
1485 unsigned char reify = anfds [fd].reify; 2145 unsigned char reify = anfds [fd].reify;
1486 anfds [fd].reify |= flags; 2146 anfds [fd].reify |= flags;
1487 2147
… …
1492 fdchanges [fdchangecnt - 1] = fd; 2152 fdchanges [fdchangecnt - 1] = fd;
1493 } 2153 }
1494} 2154}
1495 2155
1496/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2156/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1497inline_speed void ecb_cold 2157inline_speed ecb_cold void
1498fd_kill (EV_P_ int fd) 2158fd_kill (EV_P_ int fd)
1499{ 2159{
1500 ev_io *w; 2160 ev_io *w;
1501 2161
1502 while ((w = (ev_io *)anfds [fd].head)) 2162 while ((w = (ev_io *)anfds [fd].head))
… …
1505 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2165 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1506 } 2166 }
1507} 2167}
1508 2168
1509/* check whether the given fd is actually valid, for error recovery */ 2169/* check whether the given fd is actually valid, for error recovery */
1510inline_size int ecb_cold 2170inline_size ecb_cold int
1511fd_valid (int fd) 2171fd_valid (int fd)
1512{ 2172{
1513#ifdef _WIN32 2173#ifdef _WIN32
1514 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2174 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1515#else 2175#else
1516 return fcntl (fd, F_GETFD) != -1; 2176 return fcntl (fd, F_GETFD) != -1;
1517#endif 2177#endif
1518} 2178}
1519 2179
1520/* called on EBADF to verify fds */ 2180/* called on EBADF to verify fds */
1521static void noinline ecb_cold 2181noinline ecb_cold
2182static void
1522fd_ebadf (EV_P) 2183fd_ebadf (EV_P)
1523{ 2184{
1524 int fd; 2185 int fd;
1525 2186
1526 for (fd = 0; fd < anfdmax; ++fd) 2187 for (fd = 0; fd < anfdmax; ++fd)
… …
1528 if (!fd_valid (fd) && errno == EBADF) 2189 if (!fd_valid (fd) && errno == EBADF)
1529 fd_kill (EV_A_ fd); 2190 fd_kill (EV_A_ fd);
1530} 2191}
1531 2192
1532/* called on ENOMEM in select/poll to kill some fds and retry */ 2193/* called on ENOMEM in select/poll to kill some fds and retry */
1533static void noinline ecb_cold 2194noinline ecb_cold
2195static void
1534fd_enomem (EV_P) 2196fd_enomem (EV_P)
1535{ 2197{
1536 int fd; 2198 int fd;
1537 2199
1538 for (fd = anfdmax; fd--; ) 2200 for (fd = anfdmax; fd--; )
… …
1542 break; 2204 break;
1543 } 2205 }
1544} 2206}
1545 2207
1546/* usually called after fork if backend needs to re-arm all fds from scratch */ 2208/* usually called after fork if backend needs to re-arm all fds from scratch */
1547static void noinline 2209noinline
2210static void
1548fd_rearm_all (EV_P) 2211fd_rearm_all (EV_P)
1549{ 2212{
1550 int fd; 2213 int fd;
1551 2214
1552 for (fd = 0; fd < anfdmax; ++fd) 2215 for (fd = 0; fd < anfdmax; ++fd)
… …
1733 2396
1734/*****************************************************************************/ 2397/*****************************************************************************/
1735 2398
1736#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2399#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1737 2400
1738static void noinline ecb_cold 2401noinline ecb_cold
2402static void
1739evpipe_init (EV_P) 2403evpipe_init (EV_P)
1740{ 2404{
1741 if (!ev_is_active (&pipe_w)) 2405 if (!ev_is_active (&pipe_w))
1742 { 2406 {
2407 int fds [2];
2408
1743# if EV_USE_EVENTFD 2409# if EV_USE_EVENTFD
2410 fds [0] = -1;
1744 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2411 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1745 if (evfd < 0 && errno == EINVAL) 2412 if (fds [1] < 0 && errno == EINVAL)
1746 evfd = eventfd (0, 0); 2413 fds [1] = eventfd (0, 0);
1747 2414
1748 if (evfd >= 0) 2415 if (fds [1] < 0)
2416# endif
1749 { 2417 {
2418 while (pipe (fds))
2419 ev_syserr ("(libev) error creating signal/async pipe");
2420
2421 fd_intern (fds [0]);
2422 }
2423
1750 evpipe [0] = -1; 2424 evpipe [0] = fds [0];
1751 fd_intern (evfd); /* doing it twice doesn't hurt */ 2425
1752 ev_io_set (&pipe_w, evfd, EV_READ); 2426 if (evpipe [1] < 0)
2427 evpipe [1] = fds [1]; /* first call, set write fd */
2428 else
2429 {
2430 /* on subsequent calls, do not change evpipe [1] */
2431 /* so that evpipe_write can always rely on its value. */
2432 /* this branch does not do anything sensible on windows, */
2433 /* so must not be executed on windows */
2434
2435 dup2 (fds [1], evpipe [1]);
2436 close (fds [1]);
2437 }
2438
2439 fd_intern (evpipe [1]);
2440
2441 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2442 ev_io_start (EV_A_ &pipe_w);
2443 ev_unref (EV_A); /* watcher should not keep loop alive */
2444 }
2445}
2446
2447inline_speed void
2448evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2449{
2450 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2451
2452 if (expect_true (*flag))
2453 return;
2454
2455 *flag = 1;
2456 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2457
2458 pipe_write_skipped = 1;
2459
2460 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2461
2462 if (pipe_write_wanted)
2463 {
2464 int old_errno;
2465
2466 pipe_write_skipped = 0;
2467 ECB_MEMORY_FENCE_RELEASE;
2468
2469 old_errno = errno; /* save errno because write will clobber it */
2470
2471#if EV_USE_EVENTFD
2472 if (evpipe [0] < 0)
2473 {
2474 uint64_t counter = 1;
2475 write (evpipe [1], &counter, sizeof (uint64_t));
1753 } 2476 }
1754 else 2477 else
1755# endif 2478#endif
1756 { 2479 {
1757 while (pipe (evpipe)) 2480#ifdef _WIN32
1758 ev_syserr ("(libev) error creating signal/async pipe"); 2481 WSABUF buf;
1759 2482 DWORD sent;
1760 fd_intern (evpipe [0]); 2483 buf.buf = (char *)&buf;
1761 fd_intern (evpipe [1]); 2484 buf.len = 1;
1762 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2485 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1763 } 2486#else
1764
1765 ev_io_start (EV_A_ &pipe_w);
1766 ev_unref (EV_A); /* watcher should not keep loop alive */
1767 }
1768}
1769
1770inline_speed void
1771evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1772{
1773 if (expect_true (*flag))
1774 return;
1775
1776 *flag = 1;
1777
1778 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1779
1780 pipe_write_skipped = 1;
1781
1782 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1783
1784 if (pipe_write_wanted)
1785 {
1786 int old_errno;
1787
1788 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1789
1790 old_errno = errno; /* save errno because write will clobber it */
1791
1792#if EV_USE_EVENTFD
1793 if (evfd >= 0)
1794 {
1795 uint64_t counter = 1;
1796 write (evfd, &counter, sizeof (uint64_t));
1797 }
1798 else
1799#endif
1800 {
1801 /* win32 people keep sending patches that change this write() to send() */
1802 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1803 /* so when you think this write should be a send instead, please find out */
1804 /* where your send() is from - it's definitely not the microsoft send, and */
1805 /* tell me. thank you. */
1806 write (evpipe [1], &(evpipe [1]), 1); 2487 write (evpipe [1], &(evpipe [1]), 1);
2488#endif
1807 } 2489 }
1808 2490
1809 errno = old_errno; 2491 errno = old_errno;
1810 } 2492 }
1811} 2493}
… …
1818 int i; 2500 int i;
1819 2501
1820 if (revents & EV_READ) 2502 if (revents & EV_READ)
1821 { 2503 {
1822#if EV_USE_EVENTFD 2504#if EV_USE_EVENTFD
1823 if (evfd >= 0) 2505 if (evpipe [0] < 0)
1824 { 2506 {
1825 uint64_t counter; 2507 uint64_t counter;
1826 read (evfd, &counter, sizeof (uint64_t)); 2508 read (evpipe [1], &counter, sizeof (uint64_t));
1827 } 2509 }
1828 else 2510 else
1829#endif 2511#endif
1830 { 2512 {
1831 char dummy; 2513 char dummy[4];
1832 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2514#ifdef _WIN32
2515 WSABUF buf;
2516 DWORD recvd;
2517 DWORD flags = 0;
2518 buf.buf = dummy;
2519 buf.len = sizeof (dummy);
2520 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2521#else
1833 read (evpipe [0], &dummy, 1); 2522 read (evpipe [0], &dummy, sizeof (dummy));
2523#endif
1834 } 2524 }
1835 } 2525 }
1836 2526
1837 pipe_write_skipped = 0; 2527 pipe_write_skipped = 0;
2528
2529 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1838 2530
1839#if EV_SIGNAL_ENABLE 2531#if EV_SIGNAL_ENABLE
1840 if (sig_pending) 2532 if (sig_pending)
1841 { 2533 {
1842 sig_pending = 0; 2534 sig_pending = 0;
2535
2536 ECB_MEMORY_FENCE;
1843 2537
1844 for (i = EV_NSIG - 1; i--; ) 2538 for (i = EV_NSIG - 1; i--; )
1845 if (expect_false (signals [i].pending)) 2539 if (expect_false (signals [i].pending))
1846 ev_feed_signal_event (EV_A_ i + 1); 2540 ev_feed_signal_event (EV_A_ i + 1);
1847 } 2541 }
… …
1849 2543
1850#if EV_ASYNC_ENABLE 2544#if EV_ASYNC_ENABLE
1851 if (async_pending) 2545 if (async_pending)
1852 { 2546 {
1853 async_pending = 0; 2547 async_pending = 0;
2548
2549 ECB_MEMORY_FENCE;
1854 2550
1855 for (i = asynccnt; i--; ) 2551 for (i = asynccnt; i--; )
1856 if (asyncs [i]->sent) 2552 if (asyncs [i]->sent)
1857 { 2553 {
1858 asyncs [i]->sent = 0; 2554 asyncs [i]->sent = 0;
2555 ECB_MEMORY_FENCE_RELEASE;
1859 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2556 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1860 } 2557 }
1861 } 2558 }
1862#endif 2559#endif
1863} 2560}
1864 2561
1865/*****************************************************************************/ 2562/*****************************************************************************/
1866 2563
1867void 2564void
1868ev_feed_signal (int signum) 2565ev_feed_signal (int signum) EV_NOEXCEPT
1869{ 2566{
1870#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
2568 EV_P;
2569 ECB_MEMORY_FENCE_ACQUIRE;
1871 EV_P = signals [signum - 1].loop; 2570 EV_A = signals [signum - 1].loop;
1872 2571
1873 if (!EV_A) 2572 if (!EV_A)
1874 return; 2573 return;
1875#endif 2574#endif
1876 2575
1877 if (!ev_active (&pipe_w))
1878 return;
1879
1880 signals [signum - 1].pending = 1; 2576 signals [signum - 1].pending = 1;
1881 evpipe_write (EV_A_ &sig_pending); 2577 evpipe_write (EV_A_ &sig_pending);
1882} 2578}
1883 2579
1884static void 2580static void
… …
1889#endif 2585#endif
1890 2586
1891 ev_feed_signal (signum); 2587 ev_feed_signal (signum);
1892} 2588}
1893 2589
1894void noinline 2590noinline
2591void
1895ev_feed_signal_event (EV_P_ int signum) 2592ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1896{ 2593{
1897 WL w; 2594 WL w;
1898 2595
1899 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2596 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1900 return; 2597 return;
1901 2598
1902 --signum; 2599 --signum;
1903 2600
1904#if EV_MULTIPLICITY 2601#if EV_MULTIPLICITY
… …
1908 if (expect_false (signals [signum].loop != EV_A)) 2605 if (expect_false (signals [signum].loop != EV_A))
1909 return; 2606 return;
1910#endif 2607#endif
1911 2608
1912 signals [signum].pending = 0; 2609 signals [signum].pending = 0;
2610 ECB_MEMORY_FENCE_RELEASE;
1913 2611
1914 for (w = signals [signum].head; w; w = w->next) 2612 for (w = signals [signum].head; w; w = w->next)
1915 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2613 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1916} 2614}
1917 2615
… …
2015#endif 2713#endif
2016#if EV_USE_SELECT 2714#if EV_USE_SELECT
2017# include "ev_select.c" 2715# include "ev_select.c"
2018#endif 2716#endif
2019 2717
2020int ecb_cold 2718ecb_cold int
2021ev_version_major (void) 2719ev_version_major (void) EV_NOEXCEPT
2022{ 2720{
2023 return EV_VERSION_MAJOR; 2721 return EV_VERSION_MAJOR;
2024} 2722}
2025 2723
2026int ecb_cold 2724ecb_cold int
2027ev_version_minor (void) 2725ev_version_minor (void) EV_NOEXCEPT
2028{ 2726{
2029 return EV_VERSION_MINOR; 2727 return EV_VERSION_MINOR;
2030} 2728}
2031 2729
2032/* return true if we are running with elevated privileges and should ignore env variables */ 2730/* return true if we are running with elevated privileges and should ignore env variables */
2033int inline_size ecb_cold 2731inline_size ecb_cold int
2034enable_secure (void) 2732enable_secure (void)
2035{ 2733{
2036#ifdef _WIN32 2734#ifdef _WIN32
2037 return 0; 2735 return 0;
2038#else 2736#else
2039 return getuid () != geteuid () 2737 return getuid () != geteuid ()
2040 || getgid () != getegid (); 2738 || getgid () != getegid ();
2041#endif 2739#endif
2042} 2740}
2043 2741
2044unsigned int ecb_cold 2742ecb_cold
2743unsigned int
2045ev_supported_backends (void) 2744ev_supported_backends (void) EV_NOEXCEPT
2046{ 2745{
2047 unsigned int flags = 0; 2746 unsigned int flags = 0;
2048 2747
2049 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2748 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2050 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2749 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
2053 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2752 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2054 2753
2055 return flags; 2754 return flags;
2056} 2755}
2057 2756
2058unsigned int ecb_cold 2757ecb_cold
2758unsigned int
2059ev_recommended_backends (void) 2759ev_recommended_backends (void) EV_NOEXCEPT
2060{ 2760{
2061 unsigned int flags = ev_supported_backends (); 2761 unsigned int flags = ev_supported_backends ();
2062 2762
2063#ifndef __NetBSD__ 2763#ifndef __NetBSD__
2064 /* kqueue is borked on everything but netbsd apparently */ 2764 /* kqueue is borked on everything but netbsd apparently */
… …
2075#endif 2775#endif
2076 2776
2077 return flags; 2777 return flags;
2078} 2778}
2079 2779
2080unsigned int ecb_cold 2780ecb_cold
2781unsigned int
2081ev_embeddable_backends (void) 2782ev_embeddable_backends (void) EV_NOEXCEPT
2082{ 2783{
2083 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2784 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2084 2785
2085 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2786 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2086 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2787 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
2088 2789
2089 return flags; 2790 return flags;
2090} 2791}
2091 2792
2092unsigned int 2793unsigned int
2093ev_backend (EV_P) 2794ev_backend (EV_P) EV_NOEXCEPT
2094{ 2795{
2095 return backend; 2796 return backend;
2096} 2797}
2097 2798
2098#if EV_FEATURE_API 2799#if EV_FEATURE_API
2099unsigned int 2800unsigned int
2100ev_iteration (EV_P) 2801ev_iteration (EV_P) EV_NOEXCEPT
2101{ 2802{
2102 return loop_count; 2803 return loop_count;
2103} 2804}
2104 2805
2105unsigned int 2806unsigned int
2106ev_depth (EV_P) 2807ev_depth (EV_P) EV_NOEXCEPT
2107{ 2808{
2108 return loop_depth; 2809 return loop_depth;
2109} 2810}
2110 2811
2111void 2812void
2112ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2813ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2113{ 2814{
2114 io_blocktime = interval; 2815 io_blocktime = interval;
2115} 2816}
2116 2817
2117void 2818void
2118ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2819ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2119{ 2820{
2120 timeout_blocktime = interval; 2821 timeout_blocktime = interval;
2121} 2822}
2122 2823
2123void 2824void
2124ev_set_userdata (EV_P_ void *data) 2825ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2125{ 2826{
2126 userdata = data; 2827 userdata = data;
2127} 2828}
2128 2829
2129void * 2830void *
2130ev_userdata (EV_P) 2831ev_userdata (EV_P) EV_NOEXCEPT
2131{ 2832{
2132 return userdata; 2833 return userdata;
2133} 2834}
2134 2835
2135void 2836void
2136ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2837ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2137{ 2838{
2138 invoke_cb = invoke_pending_cb; 2839 invoke_cb = invoke_pending_cb;
2139} 2840}
2140 2841
2141void 2842void
2142ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2843ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2143{ 2844{
2144 release_cb = release; 2845 release_cb = release;
2145 acquire_cb = acquire; 2846 acquire_cb = acquire;
2146} 2847}
2147#endif 2848#endif
2148 2849
2149/* initialise a loop structure, must be zero-initialised */ 2850/* initialise a loop structure, must be zero-initialised */
2150static void noinline ecb_cold 2851noinline ecb_cold
2852static void
2151loop_init (EV_P_ unsigned int flags) 2853loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
2152{ 2854{
2153 if (!backend) 2855 if (!backend)
2154 { 2856 {
2155 origflags = flags; 2857 origflags = flags;
2156 2858
… …
2201#if EV_ASYNC_ENABLE 2903#if EV_ASYNC_ENABLE
2202 async_pending = 0; 2904 async_pending = 0;
2203#endif 2905#endif
2204 pipe_write_skipped = 0; 2906 pipe_write_skipped = 0;
2205 pipe_write_wanted = 0; 2907 pipe_write_wanted = 0;
2908 evpipe [0] = -1;
2909 evpipe [1] = -1;
2206#if EV_USE_INOTIFY 2910#if EV_USE_INOTIFY
2207 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2911 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2208#endif 2912#endif
2209#if EV_USE_SIGNALFD 2913#if EV_USE_SIGNALFD
2210 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2914 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
2240#endif 2944#endif
2241 } 2945 }
2242} 2946}
2243 2947
2244/* free up a loop structure */ 2948/* free up a loop structure */
2245void ecb_cold 2949ecb_cold
2950void
2246ev_loop_destroy (EV_P) 2951ev_loop_destroy (EV_P)
2247{ 2952{
2248 int i; 2953 int i;
2249 2954
2250#if EV_MULTIPLICITY 2955#if EV_MULTIPLICITY
… …
2261 EV_INVOKE_PENDING; 2966 EV_INVOKE_PENDING;
2262 } 2967 }
2263#endif 2968#endif
2264 2969
2265#if EV_CHILD_ENABLE 2970#if EV_CHILD_ENABLE
2266 if (ev_is_active (&childev)) 2971 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2267 { 2972 {
2268 ev_ref (EV_A); /* child watcher */ 2973 ev_ref (EV_A); /* child watcher */
2269 ev_signal_stop (EV_A_ &childev); 2974 ev_signal_stop (EV_A_ &childev);
2270 } 2975 }
2271#endif 2976#endif
… …
2273 if (ev_is_active (&pipe_w)) 2978 if (ev_is_active (&pipe_w))
2274 { 2979 {
2275 /*ev_ref (EV_A);*/ 2980 /*ev_ref (EV_A);*/
2276 /*ev_io_stop (EV_A_ &pipe_w);*/ 2981 /*ev_io_stop (EV_A_ &pipe_w);*/
2277 2982
2278#if EV_USE_EVENTFD
2279 if (evfd >= 0)
2280 close (evfd);
2281#endif
2282
2283 if (evpipe [0] >= 0)
2284 {
2285 EV_WIN32_CLOSE_FD (evpipe [0]); 2983 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2286 EV_WIN32_CLOSE_FD (evpipe [1]); 2984 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2287 }
2288 } 2985 }
2289 2986
2290#if EV_USE_SIGNALFD 2987#if EV_USE_SIGNALFD
2291 if (ev_is_active (&sigfd_w)) 2988 if (ev_is_active (&sigfd_w))
2292 close (sigfd); 2989 close (sigfd);
… …
2378#endif 3075#endif
2379#if EV_USE_INOTIFY 3076#if EV_USE_INOTIFY
2380 infy_fork (EV_A); 3077 infy_fork (EV_A);
2381#endif 3078#endif
2382 3079
3080#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2383 if (ev_is_active (&pipe_w)) 3081 if (ev_is_active (&pipe_w) && postfork != 2)
2384 { 3082 {
2385 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3083 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2386 3084
2387 ev_ref (EV_A); 3085 ev_ref (EV_A);
2388 ev_io_stop (EV_A_ &pipe_w); 3086 ev_io_stop (EV_A_ &pipe_w);
2389 3087
2390#if EV_USE_EVENTFD
2391 if (evfd >= 0)
2392 close (evfd);
2393#endif
2394
2395 if (evpipe [0] >= 0) 3088 if (evpipe [0] >= 0)
2396 {
2397 EV_WIN32_CLOSE_FD (evpipe [0]); 3089 EV_WIN32_CLOSE_FD (evpipe [0]);
2398 EV_WIN32_CLOSE_FD (evpipe [1]);
2399 }
2400 3090
2401#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2402 evpipe_init (EV_A); 3091 evpipe_init (EV_A);
2403 /* now iterate over everything, in case we missed something */ 3092 /* iterate over everything, in case we missed something before */
2404 pipecb (EV_A_ &pipe_w, EV_READ); 3093 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2405#endif
2406 } 3094 }
3095#endif
2407 3096
2408 postfork = 0; 3097 postfork = 0;
2409} 3098}
2410 3099
2411#if EV_MULTIPLICITY 3100#if EV_MULTIPLICITY
2412 3101
3102ecb_cold
2413struct ev_loop * ecb_cold 3103struct ev_loop *
2414ev_loop_new (unsigned int flags) 3104ev_loop_new (unsigned int flags) EV_NOEXCEPT
2415{ 3105{
2416 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3106 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2417 3107
2418 memset (EV_A, 0, sizeof (struct ev_loop)); 3108 memset (EV_A, 0, sizeof (struct ev_loop));
2419 loop_init (EV_A_ flags); 3109 loop_init (EV_A_ flags);
… …
2426} 3116}
2427 3117
2428#endif /* multiplicity */ 3118#endif /* multiplicity */
2429 3119
2430#if EV_VERIFY 3120#if EV_VERIFY
2431static void noinline ecb_cold 3121noinline ecb_cold
3122static void
2432verify_watcher (EV_P_ W w) 3123verify_watcher (EV_P_ W w)
2433{ 3124{
2434 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3125 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2435 3126
2436 if (w->pending) 3127 if (w->pending)
2437 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3128 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2438} 3129}
2439 3130
2440static void noinline ecb_cold 3131noinline ecb_cold
3132static void
2441verify_heap (EV_P_ ANHE *heap, int N) 3133verify_heap (EV_P_ ANHE *heap, int N)
2442{ 3134{
2443 int i; 3135 int i;
2444 3136
2445 for (i = HEAP0; i < N + HEAP0; ++i) 3137 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2450 3142
2451 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2452 } 3144 }
2453} 3145}
2454 3146
2455static void noinline ecb_cold 3147noinline ecb_cold
3148static void
2456array_verify (EV_P_ W *ws, int cnt) 3149array_verify (EV_P_ W *ws, int cnt)
2457{ 3150{
2458 while (cnt--) 3151 while (cnt--)
2459 { 3152 {
2460 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2463} 3156}
2464#endif 3157#endif
2465 3158
2466#if EV_FEATURE_API 3159#if EV_FEATURE_API
2467void ecb_cold 3160void ecb_cold
2468ev_verify (EV_P) 3161ev_verify (EV_P) EV_NOEXCEPT
2469{ 3162{
2470#if EV_VERIFY 3163#if EV_VERIFY
2471 int i; 3164 int i;
2472 WL w; 3165 WL w, w2;
2473 3166
2474 assert (activecnt >= -1); 3167 assert (activecnt >= -1);
2475 3168
2476 assert (fdchangemax >= fdchangecnt); 3169 assert (fdchangemax >= fdchangecnt);
2477 for (i = 0; i < fdchangecnt; ++i) 3170 for (i = 0; i < fdchangecnt; ++i)
2478 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2479 3172
2480 assert (anfdmax >= 0); 3173 assert (anfdmax >= 0);
2481 for (i = 0; i < anfdmax; ++i) 3174 for (i = 0; i < anfdmax; ++i)
3175 {
3176 int j = 0;
3177
2482 for (w = anfds [i].head; w; w = w->next) 3178 for (w = w2 = anfds [i].head; w; w = w->next)
2483 { 3179 {
2484 verify_watcher (EV_A_ (W)w); 3180 verify_watcher (EV_A_ (W)w);
3181
3182 if (j++ & 1)
3183 {
3184 assert (("libev: io watcher list contains a loop", w != w2));
3185 w2 = w2->next;
3186 }
3187
2485 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3188 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2486 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3189 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2487 } 3190 }
3191 }
2488 3192
2489 assert (timermax >= timercnt); 3193 assert (timermax >= timercnt);
2490 verify_heap (EV_A_ timers, timercnt); 3194 verify_heap (EV_A_ timers, timercnt);
2491 3195
2492#if EV_PERIODIC_ENABLE 3196#if EV_PERIODIC_ENABLE
… …
2538#endif 3242#endif
2539} 3243}
2540#endif 3244#endif
2541 3245
2542#if EV_MULTIPLICITY 3246#if EV_MULTIPLICITY
3247ecb_cold
2543struct ev_loop * ecb_cold 3248struct ev_loop *
2544#else 3249#else
2545int 3250int
2546#endif 3251#endif
2547ev_default_loop (unsigned int flags) 3252ev_default_loop (unsigned int flags) EV_NOEXCEPT
2548{ 3253{
2549 if (!ev_default_loop_ptr) 3254 if (!ev_default_loop_ptr)
2550 { 3255 {
2551#if EV_MULTIPLICITY 3256#if EV_MULTIPLICITY
2552 EV_P = ev_default_loop_ptr = &default_loop_struct; 3257 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2571 3276
2572 return ev_default_loop_ptr; 3277 return ev_default_loop_ptr;
2573} 3278}
2574 3279
2575void 3280void
2576ev_loop_fork (EV_P) 3281ev_loop_fork (EV_P) EV_NOEXCEPT
2577{ 3282{
2578 postfork = 1; /* must be in line with ev_default_fork */ 3283 postfork = 1;
2579} 3284}
2580 3285
2581/*****************************************************************************/ 3286/*****************************************************************************/
2582 3287
2583void 3288void
… …
2585{ 3290{
2586 EV_CB_INVOKE ((W)w, revents); 3291 EV_CB_INVOKE ((W)w, revents);
2587} 3292}
2588 3293
2589unsigned int 3294unsigned int
2590ev_pending_count (EV_P) 3295ev_pending_count (EV_P) EV_NOEXCEPT
2591{ 3296{
2592 int pri; 3297 int pri;
2593 unsigned int count = 0; 3298 unsigned int count = 0;
2594 3299
2595 for (pri = NUMPRI; pri--; ) 3300 for (pri = NUMPRI; pri--; )
2596 count += pendingcnt [pri]; 3301 count += pendingcnt [pri];
2597 3302
2598 return count; 3303 return count;
2599} 3304}
2600 3305
2601void noinline 3306noinline
3307void
2602ev_invoke_pending (EV_P) 3308ev_invoke_pending (EV_P)
2603{ 3309{
2604 int pri; 3310 pendingpri = NUMPRI;
2605 3311
2606 for (pri = NUMPRI; pri--; ) 3312 do
3313 {
3314 --pendingpri;
3315
3316 /* pendingpri possibly gets modified in the inner loop */
2607 while (pendingcnt [pri]) 3317 while (pendingcnt [pendingpri])
2608 { 3318 {
2609 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3319 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2610 3320
2611 p->w->pending = 0; 3321 p->w->pending = 0;
2612 EV_CB_INVOKE (p->w, p->events); 3322 EV_CB_INVOKE (p->w, p->events);
2613 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
2614 } 3324 }
3325 }
3326 while (pendingpri);
2615} 3327}
2616 3328
2617#if EV_IDLE_ENABLE 3329#if EV_IDLE_ENABLE
2618/* make idle watchers pending. this handles the "call-idle */ 3330/* make idle watchers pending. this handles the "call-idle */
2619/* only when higher priorities are idle" logic */ 3331/* only when higher priorities are idle" logic */
… …
2677 } 3389 }
2678} 3390}
2679 3391
2680#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
2681 3393
2682static void noinline 3394noinline
3395static void
2683periodic_recalc (EV_P_ ev_periodic *w) 3396periodic_recalc (EV_P_ ev_periodic *w)
2684{ 3397{
2685 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3398 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2686 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); 3399 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2687 3400
… …
2709{ 3422{
2710 EV_FREQUENT_CHECK; 3423 EV_FREQUENT_CHECK;
2711 3424
2712 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3425 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2713 { 3426 {
2714 int feed_count = 0;
2715
2716 do 3427 do
2717 { 3428 {
2718 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3429 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2719 3430
2720 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3431 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2747 } 3458 }
2748} 3459}
2749 3460
2750/* simply recalculate all periodics */ 3461/* simply recalculate all periodics */
2751/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3462/* TODO: maybe ensure that at least one event happens when jumping forward? */
2752static void noinline ecb_cold 3463noinline ecb_cold
3464static void
2753periodics_reschedule (EV_P) 3465periodics_reschedule (EV_P)
2754{ 3466{
2755 int i; 3467 int i;
2756 3468
2757 /* adjust periodics after time jump */ 3469 /* adjust periodics after time jump */
… …
2770 reheap (periodics, periodiccnt); 3482 reheap (periodics, periodiccnt);
2771} 3483}
2772#endif 3484#endif
2773 3485
2774/* adjust all timers by a given offset */ 3486/* adjust all timers by a given offset */
2775static void noinline ecb_cold 3487noinline ecb_cold
3488static void
2776timers_reschedule (EV_P_ ev_tstamp adjust) 3489timers_reschedule (EV_P_ ev_tstamp adjust)
2777{ 3490{
2778 int i; 3491 int i;
2779 3492
2780 for (i = 0; i < timercnt; ++i) 3493 for (i = 0; i < timercnt; ++i)
… …
2854 3567
2855 mn_now = ev_rt_now; 3568 mn_now = ev_rt_now;
2856 } 3569 }
2857} 3570}
2858 3571
2859void 3572int
2860ev_run (EV_P_ int flags) 3573ev_run (EV_P_ int flags)
2861{ 3574{
2862#if EV_FEATURE_API 3575#if EV_FEATURE_API
2863 ++loop_depth; 3576 ++loop_depth;
2864#endif 3577#endif
… …
2977#endif 3690#endif
2978 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3691 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2979 backend_poll (EV_A_ waittime); 3692 backend_poll (EV_A_ waittime);
2980 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3693 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2981 3694
2982 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 3695 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2983 3696
3697 ECB_MEMORY_FENCE_ACQUIRE;
2984 if (pipe_write_skipped) 3698 if (pipe_write_skipped)
2985 { 3699 {
2986 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3700 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2987 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3701 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2988 } 3702 }
… …
3021 loop_done = EVBREAK_CANCEL; 3735 loop_done = EVBREAK_CANCEL;
3022 3736
3023#if EV_FEATURE_API 3737#if EV_FEATURE_API
3024 --loop_depth; 3738 --loop_depth;
3025#endif 3739#endif
3026}
3027 3740
3741 return activecnt;
3742}
3743
3028void 3744void
3029ev_break (EV_P_ int how) 3745ev_break (EV_P_ int how) EV_NOEXCEPT
3030{ 3746{
3031 loop_done = how; 3747 loop_done = how;
3032} 3748}
3033 3749
3034void 3750void
3035ev_ref (EV_P) 3751ev_ref (EV_P) EV_NOEXCEPT
3036{ 3752{
3037 ++activecnt; 3753 ++activecnt;
3038} 3754}
3039 3755
3040void 3756void
3041ev_unref (EV_P) 3757ev_unref (EV_P) EV_NOEXCEPT
3042{ 3758{
3043 --activecnt; 3759 --activecnt;
3044} 3760}
3045 3761
3046void 3762void
3047ev_now_update (EV_P) 3763ev_now_update (EV_P) EV_NOEXCEPT
3048{ 3764{
3049 time_update (EV_A_ 1e100); 3765 time_update (EV_A_ 1e100);
3050} 3766}
3051 3767
3052void 3768void
3053ev_suspend (EV_P) 3769ev_suspend (EV_P) EV_NOEXCEPT
3054{ 3770{
3055 ev_now_update (EV_A); 3771 ev_now_update (EV_A);
3056} 3772}
3057 3773
3058void 3774void
3059ev_resume (EV_P) 3775ev_resume (EV_P) EV_NOEXCEPT
3060{ 3776{
3061 ev_tstamp mn_prev = mn_now; 3777 ev_tstamp mn_prev = mn_now;
3062 3778
3063 ev_now_update (EV_A); 3779 ev_now_update (EV_A);
3064 timers_reschedule (EV_A_ mn_now - mn_prev); 3780 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
3103 w->pending = 0; 3819 w->pending = 0;
3104 } 3820 }
3105} 3821}
3106 3822
3107int 3823int
3108ev_clear_pending (EV_P_ void *w) 3824ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
3109{ 3825{
3110 W w_ = (W)w; 3826 W w_ = (W)w;
3111 int pending = w_->pending; 3827 int pending = w_->pending;
3112 3828
3113 if (expect_true (pending)) 3829 if (expect_true (pending))
… …
3145 w->active = 0; 3861 w->active = 0;
3146} 3862}
3147 3863
3148/*****************************************************************************/ 3864/*****************************************************************************/
3149 3865
3150void noinline 3866noinline
3867void
3151ev_io_start (EV_P_ ev_io *w) 3868ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
3152{ 3869{
3153 int fd = w->fd; 3870 int fd = w->fd;
3154 3871
3155 if (expect_false (ev_is_active (w))) 3872 if (expect_false (ev_is_active (w)))
3156 return; 3873 return;
… …
3162 3879
3163 ev_start (EV_A_ (W)w, 1); 3880 ev_start (EV_A_ (W)w, 1);
3164 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3881 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3165 wlist_add (&anfds[fd].head, (WL)w); 3882 wlist_add (&anfds[fd].head, (WL)w);
3166 3883
3884 /* common bug, apparently */
3885 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3886
3167 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3887 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3168 w->events &= ~EV__IOFDSET; 3888 w->events &= ~EV__IOFDSET;
3169 3889
3170 EV_FREQUENT_CHECK; 3890 EV_FREQUENT_CHECK;
3171} 3891}
3172 3892
3173void noinline 3893noinline
3894void
3174ev_io_stop (EV_P_ ev_io *w) 3895ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
3175{ 3896{
3176 clear_pending (EV_A_ (W)w); 3897 clear_pending (EV_A_ (W)w);
3177 if (expect_false (!ev_is_active (w))) 3898 if (expect_false (!ev_is_active (w)))
3178 return; 3899 return;
3179 3900
… …
3187 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3908 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3188 3909
3189 EV_FREQUENT_CHECK; 3910 EV_FREQUENT_CHECK;
3190} 3911}
3191 3912
3192void noinline 3913noinline
3914void
3193ev_timer_start (EV_P_ ev_timer *w) 3915ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
3194{ 3916{
3195 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
3196 return; 3918 return;
3197 3919
3198 ev_at (w) += mn_now; 3920 ev_at (w) += mn_now;
… …
3211 EV_FREQUENT_CHECK; 3933 EV_FREQUENT_CHECK;
3212 3934
3213 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3935 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3214} 3936}
3215 3937
3216void noinline 3938noinline
3939void
3217ev_timer_stop (EV_P_ ev_timer *w) 3940ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
3218{ 3941{
3219 clear_pending (EV_A_ (W)w); 3942 clear_pending (EV_A_ (W)w);
3220 if (expect_false (!ev_is_active (w))) 3943 if (expect_false (!ev_is_active (w)))
3221 return; 3944 return;
3222 3945
… …
3241 ev_stop (EV_A_ (W)w); 3964 ev_stop (EV_A_ (W)w);
3242 3965
3243 EV_FREQUENT_CHECK; 3966 EV_FREQUENT_CHECK;
3244} 3967}
3245 3968
3246void noinline 3969noinline
3970void
3247ev_timer_again (EV_P_ ev_timer *w) 3971ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
3248{ 3972{
3249 EV_FREQUENT_CHECK; 3973 EV_FREQUENT_CHECK;
3974
3975 clear_pending (EV_A_ (W)w);
3250 3976
3251 if (ev_is_active (w)) 3977 if (ev_is_active (w))
3252 { 3978 {
3253 if (w->repeat) 3979 if (w->repeat)
3254 { 3980 {
… …
3267 3993
3268 EV_FREQUENT_CHECK; 3994 EV_FREQUENT_CHECK;
3269} 3995}
3270 3996
3271ev_tstamp 3997ev_tstamp
3272ev_timer_remaining (EV_P_ ev_timer *w) 3998ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
3273{ 3999{
3274 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4000 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3275} 4001}
3276 4002
3277#if EV_PERIODIC_ENABLE 4003#if EV_PERIODIC_ENABLE
3278void noinline 4004noinline
4005void
3279ev_periodic_start (EV_P_ ev_periodic *w) 4006ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
3280{ 4007{
3281 if (expect_false (ev_is_active (w))) 4008 if (expect_false (ev_is_active (w)))
3282 return; 4009 return;
3283 4010
3284 if (w->reschedule_cb) 4011 if (w->reschedule_cb)
… …
3303 EV_FREQUENT_CHECK; 4030 EV_FREQUENT_CHECK;
3304 4031
3305 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4032 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3306} 4033}
3307 4034
3308void noinline 4035noinline
4036void
3309ev_periodic_stop (EV_P_ ev_periodic *w) 4037ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
3310{ 4038{
3311 clear_pending (EV_A_ (W)w); 4039 clear_pending (EV_A_ (W)w);
3312 if (expect_false (!ev_is_active (w))) 4040 if (expect_false (!ev_is_active (w)))
3313 return; 4041 return;
3314 4042
… …
3331 ev_stop (EV_A_ (W)w); 4059 ev_stop (EV_A_ (W)w);
3332 4060
3333 EV_FREQUENT_CHECK; 4061 EV_FREQUENT_CHECK;
3334} 4062}
3335 4063
3336void noinline 4064noinline
4065void
3337ev_periodic_again (EV_P_ ev_periodic *w) 4066ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
3338{ 4067{
3339 /* TODO: use adjustheap and recalculation */ 4068 /* TODO: use adjustheap and recalculation */
3340 ev_periodic_stop (EV_A_ w); 4069 ev_periodic_stop (EV_A_ w);
3341 ev_periodic_start (EV_A_ w); 4070 ev_periodic_start (EV_A_ w);
3342} 4071}
… …
3346# define SA_RESTART 0 4075# define SA_RESTART 0
3347#endif 4076#endif
3348 4077
3349#if EV_SIGNAL_ENABLE 4078#if EV_SIGNAL_ENABLE
3350 4079
3351void noinline 4080noinline
4081void
3352ev_signal_start (EV_P_ ev_signal *w) 4082ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
3353{ 4083{
3354 if (expect_false (ev_is_active (w))) 4084 if (expect_false (ev_is_active (w)))
3355 return; 4085 return;
3356 4086
3357 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4087 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
3359#if EV_MULTIPLICITY 4089#if EV_MULTIPLICITY
3360 assert (("libev: a signal must not be attached to two different loops", 4090 assert (("libev: a signal must not be attached to two different loops",
3361 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4091 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3362 4092
3363 signals [w->signum - 1].loop = EV_A; 4093 signals [w->signum - 1].loop = EV_A;
4094 ECB_MEMORY_FENCE_RELEASE;
3364#endif 4095#endif
3365 4096
3366 EV_FREQUENT_CHECK; 4097 EV_FREQUENT_CHECK;
3367 4098
3368#if EV_USE_SIGNALFD 4099#if EV_USE_SIGNALFD
… …
3427 } 4158 }
3428 4159
3429 EV_FREQUENT_CHECK; 4160 EV_FREQUENT_CHECK;
3430} 4161}
3431 4162
3432void noinline 4163noinline
4164void
3433ev_signal_stop (EV_P_ ev_signal *w) 4165ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
3434{ 4166{
3435 clear_pending (EV_A_ (W)w); 4167 clear_pending (EV_A_ (W)w);
3436 if (expect_false (!ev_is_active (w))) 4168 if (expect_false (!ev_is_active (w)))
3437 return; 4169 return;
3438 4170
… …
3469#endif 4201#endif
3470 4202
3471#if EV_CHILD_ENABLE 4203#if EV_CHILD_ENABLE
3472 4204
3473void 4205void
3474ev_child_start (EV_P_ ev_child *w) 4206ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3475{ 4207{
3476#if EV_MULTIPLICITY 4208#if EV_MULTIPLICITY
3477 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4209 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3478#endif 4210#endif
3479 if (expect_false (ev_is_active (w))) 4211 if (expect_false (ev_is_active (w)))
… …
3486 4218
3487 EV_FREQUENT_CHECK; 4219 EV_FREQUENT_CHECK;
3488} 4220}
3489 4221
3490void 4222void
3491ev_child_stop (EV_P_ ev_child *w) 4223ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3492{ 4224{
3493 clear_pending (EV_A_ (W)w); 4225 clear_pending (EV_A_ (W)w);
3494 if (expect_false (!ev_is_active (w))) 4226 if (expect_false (!ev_is_active (w)))
3495 return; 4227 return;
3496 4228
… …
3513 4245
3514#define DEF_STAT_INTERVAL 5.0074891 4246#define DEF_STAT_INTERVAL 5.0074891
3515#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4247#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3516#define MIN_STAT_INTERVAL 0.1074891 4248#define MIN_STAT_INTERVAL 0.1074891
3517 4249
3518static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4250noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3519 4251
3520#if EV_USE_INOTIFY 4252#if EV_USE_INOTIFY
3521 4253
3522/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4254/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3523# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4255# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3524 4256
3525static void noinline 4257noinline
4258static void
3526infy_add (EV_P_ ev_stat *w) 4259infy_add (EV_P_ ev_stat *w)
3527{ 4260{
3528 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); 4261 w->wd = inotify_add_watch (fs_fd, w->path,
4262 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4263 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4264 | IN_DONT_FOLLOW | IN_MASK_ADD);
3529 4265
3530 if (w->wd >= 0) 4266 if (w->wd >= 0)
3531 { 4267 {
3532 struct statfs sfs; 4268 struct statfs sfs;
3533 4269
… …
3537 4273
3538 if (!fs_2625) 4274 if (!fs_2625)
3539 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4275 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3540 else if (!statfs (w->path, &sfs) 4276 else if (!statfs (w->path, &sfs)
3541 && (sfs.f_type == 0x1373 /* devfs */ 4277 && (sfs.f_type == 0x1373 /* devfs */
4278 || sfs.f_type == 0x4006 /* fat */
4279 || sfs.f_type == 0x4d44 /* msdos */
3542 || sfs.f_type == 0xEF53 /* ext2/3 */ 4280 || sfs.f_type == 0xEF53 /* ext2/3 */
4281 || sfs.f_type == 0x72b6 /* jffs2 */
4282 || sfs.f_type == 0x858458f6 /* ramfs */
4283 || sfs.f_type == 0x5346544e /* ntfs */
3543 || sfs.f_type == 0x3153464a /* jfs */ 4284 || sfs.f_type == 0x3153464a /* jfs */
4285 || sfs.f_type == 0x9123683e /* btrfs */
3544 || sfs.f_type == 0x52654973 /* reiser3 */ 4286 || sfs.f_type == 0x52654973 /* reiser3 */
3545 || sfs.f_type == 0x01021994 /* tempfs */ 4287 || sfs.f_type == 0x01021994 /* tmpfs */
3546 || sfs.f_type == 0x58465342 /* xfs */)) 4288 || sfs.f_type == 0x58465342 /* xfs */))
3547 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4289 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3548 else 4290 else
3549 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4291 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3550 } 4292 }
… …
3585 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4327 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3586 ev_timer_again (EV_A_ &w->timer); 4328 ev_timer_again (EV_A_ &w->timer);
3587 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4329 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3588} 4330}
3589 4331
3590static void noinline 4332noinline
4333static void
3591infy_del (EV_P_ ev_stat *w) 4334infy_del (EV_P_ ev_stat *w)
3592{ 4335{
3593 int slot; 4336 int slot;
3594 int wd = w->wd; 4337 int wd = w->wd;
3595 4338
… …
3602 4345
3603 /* remove this watcher, if others are watching it, they will rearm */ 4346 /* remove this watcher, if others are watching it, they will rearm */
3604 inotify_rm_watch (fs_fd, wd); 4347 inotify_rm_watch (fs_fd, wd);
3605} 4348}
3606 4349
3607static void noinline 4350noinline
4351static void
3608infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4352infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3609{ 4353{
3610 if (slot < 0) 4354 if (slot < 0)
3611 /* overflow, need to check for all hash slots */ 4355 /* overflow, need to check for all hash slots */
3612 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4356 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3648 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4392 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3649 ofs += sizeof (struct inotify_event) + ev->len; 4393 ofs += sizeof (struct inotify_event) + ev->len;
3650 } 4394 }
3651} 4395}
3652 4396
3653inline_size void ecb_cold 4397inline_size ecb_cold
4398void
3654ev_check_2625 (EV_P) 4399ev_check_2625 (EV_P)
3655{ 4400{
3656 /* kernels < 2.6.25 are borked 4401 /* kernels < 2.6.25 are borked
3657 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4402 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3658 */ 4403 */
… …
3663} 4408}
3664 4409
3665inline_size int 4410inline_size int
3666infy_newfd (void) 4411infy_newfd (void)
3667{ 4412{
3668#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4413#if defined IN_CLOEXEC && defined IN_NONBLOCK
3669 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4414 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3670 if (fd >= 0) 4415 if (fd >= 0)
3671 return fd; 4416 return fd;
3672#endif 4417#endif
3673 return inotify_init (); 4418 return inotify_init ();
… …
3748#else 4493#else
3749# define EV_LSTAT(p,b) lstat (p, b) 4494# define EV_LSTAT(p,b) lstat (p, b)
3750#endif 4495#endif
3751 4496
3752void 4497void
3753ev_stat_stat (EV_P_ ev_stat *w) 4498ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3754{ 4499{
3755 if (lstat (w->path, &w->attr) < 0) 4500 if (lstat (w->path, &w->attr) < 0)
3756 w->attr.st_nlink = 0; 4501 w->attr.st_nlink = 0;
3757 else if (!w->attr.st_nlink) 4502 else if (!w->attr.st_nlink)
3758 w->attr.st_nlink = 1; 4503 w->attr.st_nlink = 1;
3759} 4504}
3760 4505
3761static void noinline 4506noinline
4507static void
3762stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4508stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3763{ 4509{
3764 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4510 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3765 4511
3766 ev_statdata prev = w->attr; 4512 ev_statdata prev = w->attr;
… …
3797 ev_feed_event (EV_A_ w, EV_STAT); 4543 ev_feed_event (EV_A_ w, EV_STAT);
3798 } 4544 }
3799} 4545}
3800 4546
3801void 4547void
3802ev_stat_start (EV_P_ ev_stat *w) 4548ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3803{ 4549{
3804 if (expect_false (ev_is_active (w))) 4550 if (expect_false (ev_is_active (w)))
3805 return; 4551 return;
3806 4552
3807 ev_stat_stat (EV_A_ w); 4553 ev_stat_stat (EV_A_ w);
… …
3828 4574
3829 EV_FREQUENT_CHECK; 4575 EV_FREQUENT_CHECK;
3830} 4576}
3831 4577
3832void 4578void
3833ev_stat_stop (EV_P_ ev_stat *w) 4579ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3834{ 4580{
3835 clear_pending (EV_A_ (W)w); 4581 clear_pending (EV_A_ (W)w);
3836 if (expect_false (!ev_is_active (w))) 4582 if (expect_false (!ev_is_active (w)))
3837 return; 4583 return;
3838 4584
… …
3854} 4600}
3855#endif 4601#endif
3856 4602
3857#if EV_IDLE_ENABLE 4603#if EV_IDLE_ENABLE
3858void 4604void
3859ev_idle_start (EV_P_ ev_idle *w) 4605ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3860{ 4606{
3861 if (expect_false (ev_is_active (w))) 4607 if (expect_false (ev_is_active (w)))
3862 return; 4608 return;
3863 4609
3864 pri_adjust (EV_A_ (W)w); 4610 pri_adjust (EV_A_ (W)w);
… …
3877 4623
3878 EV_FREQUENT_CHECK; 4624 EV_FREQUENT_CHECK;
3879} 4625}
3880 4626
3881void 4627void
3882ev_idle_stop (EV_P_ ev_idle *w) 4628ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3883{ 4629{
3884 clear_pending (EV_A_ (W)w); 4630 clear_pending (EV_A_ (W)w);
3885 if (expect_false (!ev_is_active (w))) 4631 if (expect_false (!ev_is_active (w)))
3886 return; 4632 return;
3887 4633
… …
3901} 4647}
3902#endif 4648#endif
3903 4649
3904#if EV_PREPARE_ENABLE 4650#if EV_PREPARE_ENABLE
3905void 4651void
3906ev_prepare_start (EV_P_ ev_prepare *w) 4652ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3907{ 4653{
3908 if (expect_false (ev_is_active (w))) 4654 if (expect_false (ev_is_active (w)))
3909 return; 4655 return;
3910 4656
3911 EV_FREQUENT_CHECK; 4657 EV_FREQUENT_CHECK;
… …
3916 4662
3917 EV_FREQUENT_CHECK; 4663 EV_FREQUENT_CHECK;
3918} 4664}
3919 4665
3920void 4666void
3921ev_prepare_stop (EV_P_ ev_prepare *w) 4667ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3922{ 4668{
3923 clear_pending (EV_A_ (W)w); 4669 clear_pending (EV_A_ (W)w);
3924 if (expect_false (!ev_is_active (w))) 4670 if (expect_false (!ev_is_active (w)))
3925 return; 4671 return;
3926 4672
… …
3939} 4685}
3940#endif 4686#endif
3941 4687
3942#if EV_CHECK_ENABLE 4688#if EV_CHECK_ENABLE
3943void 4689void
3944ev_check_start (EV_P_ ev_check *w) 4690ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3945{ 4691{
3946 if (expect_false (ev_is_active (w))) 4692 if (expect_false (ev_is_active (w)))
3947 return; 4693 return;
3948 4694
3949 EV_FREQUENT_CHECK; 4695 EV_FREQUENT_CHECK;
… …
3954 4700
3955 EV_FREQUENT_CHECK; 4701 EV_FREQUENT_CHECK;
3956} 4702}
3957 4703
3958void 4704void
3959ev_check_stop (EV_P_ ev_check *w) 4705ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3960{ 4706{
3961 clear_pending (EV_A_ (W)w); 4707 clear_pending (EV_A_ (W)w);
3962 if (expect_false (!ev_is_active (w))) 4708 if (expect_false (!ev_is_active (w)))
3963 return; 4709 return;
3964 4710
… …
3976 EV_FREQUENT_CHECK; 4722 EV_FREQUENT_CHECK;
3977} 4723}
3978#endif 4724#endif
3979 4725
3980#if EV_EMBED_ENABLE 4726#if EV_EMBED_ENABLE
3981void noinline 4727noinline
4728void
3982ev_embed_sweep (EV_P_ ev_embed *w) 4729ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3983{ 4730{
3984 ev_run (w->other, EVRUN_NOWAIT); 4731 ev_run (w->other, EVRUN_NOWAIT);
3985} 4732}
3986 4733
3987static void 4734static void
… …
4035 ev_idle_stop (EV_A_ idle); 4782 ev_idle_stop (EV_A_ idle);
4036} 4783}
4037#endif 4784#endif
4038 4785
4039void 4786void
4040ev_embed_start (EV_P_ ev_embed *w) 4787ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
4041{ 4788{
4042 if (expect_false (ev_is_active (w))) 4789 if (expect_false (ev_is_active (w)))
4043 return; 4790 return;
4044 4791
4045 { 4792 {
… …
4066 4813
4067 EV_FREQUENT_CHECK; 4814 EV_FREQUENT_CHECK;
4068} 4815}
4069 4816
4070void 4817void
4071ev_embed_stop (EV_P_ ev_embed *w) 4818ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
4072{ 4819{
4073 clear_pending (EV_A_ (W)w); 4820 clear_pending (EV_A_ (W)w);
4074 if (expect_false (!ev_is_active (w))) 4821 if (expect_false (!ev_is_active (w)))
4075 return; 4822 return;
4076 4823
… …
4086} 4833}
4087#endif 4834#endif
4088 4835
4089#if EV_FORK_ENABLE 4836#if EV_FORK_ENABLE
4090void 4837void
4091ev_fork_start (EV_P_ ev_fork *w) 4838ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
4092{ 4839{
4093 if (expect_false (ev_is_active (w))) 4840 if (expect_false (ev_is_active (w)))
4094 return; 4841 return;
4095 4842
4096 EV_FREQUENT_CHECK; 4843 EV_FREQUENT_CHECK;
… …
4101 4848
4102 EV_FREQUENT_CHECK; 4849 EV_FREQUENT_CHECK;
4103} 4850}
4104 4851
4105void 4852void
4106ev_fork_stop (EV_P_ ev_fork *w) 4853ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
4107{ 4854{
4108 clear_pending (EV_A_ (W)w); 4855 clear_pending (EV_A_ (W)w);
4109 if (expect_false (!ev_is_active (w))) 4856 if (expect_false (!ev_is_active (w)))
4110 return; 4857 return;
4111 4858
… …
4124} 4871}
4125#endif 4872#endif
4126 4873
4127#if EV_CLEANUP_ENABLE 4874#if EV_CLEANUP_ENABLE
4128void 4875void
4129ev_cleanup_start (EV_P_ ev_cleanup *w) 4876ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4130{ 4877{
4131 if (expect_false (ev_is_active (w))) 4878 if (expect_false (ev_is_active (w)))
4132 return; 4879 return;
4133 4880
4134 EV_FREQUENT_CHECK; 4881 EV_FREQUENT_CHECK;
… …
4141 ev_unref (EV_A); 4888 ev_unref (EV_A);
4142 EV_FREQUENT_CHECK; 4889 EV_FREQUENT_CHECK;
4143} 4890}
4144 4891
4145void 4892void
4146ev_cleanup_stop (EV_P_ ev_cleanup *w) 4893ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4147{ 4894{
4148 clear_pending (EV_A_ (W)w); 4895 clear_pending (EV_A_ (W)w);
4149 if (expect_false (!ev_is_active (w))) 4896 if (expect_false (!ev_is_active (w)))
4150 return; 4897 return;
4151 4898
… …
4165} 4912}
4166#endif 4913#endif
4167 4914
4168#if EV_ASYNC_ENABLE 4915#if EV_ASYNC_ENABLE
4169void 4916void
4170ev_async_start (EV_P_ ev_async *w) 4917ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4171{ 4918{
4172 if (expect_false (ev_is_active (w))) 4919 if (expect_false (ev_is_active (w)))
4173 return; 4920 return;
4174 4921
4175 w->sent = 0; 4922 w->sent = 0;
… …
4184 4931
4185 EV_FREQUENT_CHECK; 4932 EV_FREQUENT_CHECK;
4186} 4933}
4187 4934
4188void 4935void
4189ev_async_stop (EV_P_ ev_async *w) 4936ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4190{ 4937{
4191 clear_pending (EV_A_ (W)w); 4938 clear_pending (EV_A_ (W)w);
4192 if (expect_false (!ev_is_active (w))) 4939 if (expect_false (!ev_is_active (w)))
4193 return; 4940 return;
4194 4941
… …
4205 4952
4206 EV_FREQUENT_CHECK; 4953 EV_FREQUENT_CHECK;
4207} 4954}
4208 4955
4209void 4956void
4210ev_async_send (EV_P_ ev_async *w) 4957ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
4211{ 4958{
4212 w->sent = 1; 4959 w->sent = 1;
4213 evpipe_write (EV_A_ &async_pending); 4960 evpipe_write (EV_A_ &async_pending);
4214} 4961}
4215#endif 4962#endif
… …
4252 4999
4253 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5000 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4254} 5001}
4255 5002
4256void 5003void
4257ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
4258{ 5005{
4259 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4260 5007
4261 if (expect_false (!once)) 5008 if (expect_false (!once))
4262 { 5009 {
… …
4283} 5030}
4284 5031
4285/*****************************************************************************/ 5032/*****************************************************************************/
4286 5033
4287#if EV_WALK_ENABLE 5034#if EV_WALK_ENABLE
4288void ecb_cold 5035ecb_cold
5036void
4289ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5037ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
4290{ 5038{
4291 int i, j; 5039 int i, j;
4292 ev_watcher_list *wl, *wn; 5040 ev_watcher_list *wl, *wn;
4293 5041
4294 if (types & (EV_IO | EV_EMBED)) 5042 if (types & (EV_IO | EV_EMBED))
… …
4400 5148
4401#if EV_MULTIPLICITY 5149#if EV_MULTIPLICITY
4402 #include "ev_wrap.h" 5150 #include "ev_wrap.h"
4403#endif 5151#endif
4404 5152
4405EV_CPP(})
4406

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