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Comparing libev/ev.c (file contents):
Revision 1.392 by root, Thu Aug 4 14:37:49 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 #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) 650#endif
544 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) 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 */
545#endif 659#endif
546 660
547#ifndef ECB_MEMORY_FENCE 661#ifndef ECB_MEMORY_FENCE
548 #if ECB_GCC_VERSION(2,5) 662 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
549 #if __x86 663 #if __i386 || __i386__
550 #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")
551 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 665 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
552 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
553 #elif __amd64 667 #elif ECB_GCC_AMD64
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
555 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 669 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
556 #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")
557 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 671 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
558 #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 */
559 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ 680 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
560 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ 681 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
682 || defined __ARM_ARCH_6T2__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
684 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
561 || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ 685 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
562 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 686 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #define ECB_MEMORY_FENCE \ 687 #elif __aarch64__
564 do { \ 688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
565 int null = 0; \ 689 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
566 __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \ 690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
567 while (0) 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")
568 #endif 712 #endif
569 #endif 713 #endif
570#endif 714#endif
571 715
572#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
573 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) 729 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
574 #define ECB_MEMORY_FENCE __sync_synchronize () 730 #define ECB_MEMORY_FENCE __sync_synchronize ()
575 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 731 #elif _MSC_VER >= 1500 /* VC++ 2008 */
576 /*#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()
577 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 737 #elif _MSC_VER >= 1400 /* VC++ 2005 */
578 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 738 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
579 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 739 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
580 #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 */
581 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 741 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
582 #elif defined(_WIN32) 742 #elif defined _WIN32
583 #include <WinNT.h> 743 #include <WinNT.h>
584 #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)
585 #endif 769 #endif
586#endif 770#endif
587 771
588#ifndef ECB_MEMORY_FENCE 772#ifndef ECB_MEMORY_FENCE
589 #if !ECB_AVOID_PTHREADS 773 #if !ECB_AVOID_PTHREADS
… …
601 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 785 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
602 #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)
603 #endif 787 #endif
604#endif 788#endif
605 789
606#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) 790#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
607 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 791 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
608#endif 792#endif
609 793
610#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) 794#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
611 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 795 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
612#endif 796#endif
613 797
614/*****************************************************************************/ 798/*****************************************************************************/
615 799
616#define ECB_C99 (__STDC_VERSION__ >= 199901L) 800#if ECB_CPP
617
618#if __cplusplus
619 #define ecb_inline static inline 801 #define ecb_inline static inline
620#elif ECB_GCC_VERSION(2,5) 802#elif ECB_GCC_VERSION(2,5)
621 #define ecb_inline static __inline__ 803 #define ecb_inline static __inline__
622#elif ECB_C99 804#elif ECB_C99
623 #define ecb_inline static inline 805 #define ecb_inline static inline
… …
637 819
638#define ECB_CONCAT_(a, b) a ## b 820#define ECB_CONCAT_(a, b) a ## b
639#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 821#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
640#define ECB_STRINGIFY_(a) # a 822#define ECB_STRINGIFY_(a) # a
641#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))
642 825
643#define ecb_function_ ecb_inline 826#define ecb_function_ ecb_inline
644 827
645#if ECB_GCC_VERSION(3,1) 828#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
646 #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)
647 #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)
648 #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)
649 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 851 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
650#else 852#else
651 #define ecb_attribute(attrlist)
652 #define ecb_is_constant(expr) 0
653 #define ecb_expect(expr,value) (expr)
654 #define ecb_prefetch(addr,rw,locality) 853 #define ecb_prefetch(addr,rw,locality)
655#endif 854#endif
656 855
657/* no emulation for ecb_decltype */ 856/* no emulation for ecb_decltype */
658#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; };
659 #define ecb_decltype(x) __decltype(x) 860 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
660#elif ECB_GCC_VERSION(3,0) 861#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
661 #define ecb_decltype(x) __typeof(x) 862 #define ecb_decltype(x) __typeof__ (x)
662#endif 863#endif
663 864
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
664#define ecb_noinline ecb_attribute ((__noinline__)) 882 #define ecb_noinline ecb_attribute ((__noinline__))
665#define ecb_noreturn ecb_attribute ((__noreturn__)) 883#endif
884
666#define ecb_unused ecb_attribute ((__unused__)) 885#define ecb_unused ecb_attribute ((__unused__))
667#define ecb_const ecb_attribute ((__const__)) 886#define ecb_const ecb_attribute ((__const__))
668#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
669 900
670#if ECB_GCC_VERSION(4,3) 901#if ECB_GCC_VERSION(4,3)
671 #define ecb_artificial ecb_attribute ((__artificial__)) 902 #define ecb_artificial ecb_attribute ((__artificial__))
672 #define ecb_hot ecb_attribute ((__hot__)) 903 #define ecb_hot ecb_attribute ((__hot__))
673 #define ecb_cold ecb_attribute ((__cold__)) 904 #define ecb_cold ecb_attribute ((__cold__))
… …
685/* for compatibility to the rest of the world */ 916/* for compatibility to the rest of the world */
686#define ecb_likely(expr) ecb_expect_true (expr) 917#define ecb_likely(expr) ecb_expect_true (expr)
687#define ecb_unlikely(expr) ecb_expect_false (expr) 918#define ecb_unlikely(expr) ecb_expect_false (expr)
688 919
689/* count trailing zero bits and count # of one bits */ 920/* count trailing zero bits and count # of one bits */
690#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))
691 /* 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 */
692 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 926 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
693 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 927 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
694 #define ecb_ctz32(x) __builtin_ctz (x) 928 #define ecb_ctz32(x) __builtin_ctz (x)
695 #define ecb_ctz64(x) __builtin_ctzll (x) 929 #define ecb_ctz64(x) __builtin_ctzll (x)
696 #define ecb_popcount32(x) __builtin_popcount (x) 930 #define ecb_popcount32(x) __builtin_popcount (x)
697 /* no popcountll */ 931 /* no popcountll */
698#else 932#else
699 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 933 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
700 ecb_function_ int 934 ecb_function_ ecb_const int
701 ecb_ctz32 (uint32_t x) 935 ecb_ctz32 (uint32_t x)
702 { 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
703 int r = 0; 942 int r = 0;
704 943
705 x &= ~x + 1; /* this isolates the lowest bit */ 944 x &= ~x + 1; /* this isolates the lowest bit */
706 945
707#if ECB_branchless_on_i386 946#if ECB_branchless_on_i386
… …
717 if (x & 0xff00ff00) r += 8; 956 if (x & 0xff00ff00) r += 8;
718 if (x & 0xffff0000) r += 16; 957 if (x & 0xffff0000) r += 16;
719#endif 958#endif
720 959
721 return r; 960 return r;
961#endif
722 } 962 }
723 963
724 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 964 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
725 ecb_function_ int 965 ecb_function_ ecb_const int
726 ecb_ctz64 (uint64_t x) 966 ecb_ctz64 (uint64_t x)
727 { 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
728 int shift = x & 0xffffffffU ? 0 : 32; 973 int shift = x & 0xffffffff ? 0 : 32;
729 return ecb_ctz32 (x >> shift) + shift; 974 return ecb_ctz32 (x >> shift) + shift;
975#endif
730 } 976 }
731 977
732 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 978 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
733 ecb_function_ int 979 ecb_function_ ecb_const int
734 ecb_popcount32 (uint32_t x) 980 ecb_popcount32 (uint32_t x)
735 { 981 {
736 x -= (x >> 1) & 0x55555555; 982 x -= (x >> 1) & 0x55555555;
737 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 983 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
738 x = ((x >> 4) + x) & 0x0f0f0f0f; 984 x = ((x >> 4) + x) & 0x0f0f0f0f;
739 x *= 0x01010101; 985 x *= 0x01010101;
740 986
741 return x >> 24; 987 return x >> 24;
742 } 988 }
743 989
744 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 990 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
745 ecb_function_ int ecb_ld32 (uint32_t x) 991 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
746 { 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
747 int r = 0; 998 int r = 0;
748 999
749 if (x >> 16) { x >>= 16; r += 16; } 1000 if (x >> 16) { x >>= 16; r += 16; }
750 if (x >> 8) { x >>= 8; r += 8; } 1001 if (x >> 8) { x >>= 8; r += 8; }
751 if (x >> 4) { x >>= 4; r += 4; } 1002 if (x >> 4) { x >>= 4; r += 4; }
752 if (x >> 2) { x >>= 2; r += 2; } 1003 if (x >> 2) { x >>= 2; r += 2; }
753 if (x >> 1) { r += 1; } 1004 if (x >> 1) { r += 1; }
754 1005
755 return r; 1006 return r;
1007#endif
756 } 1008 }
757 1009
758 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 1010 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
759 ecb_function_ int ecb_ld64 (uint64_t x) 1011 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
760 { 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
761 int r = 0; 1018 int r = 0;
762 1019
763 if (x >> 32) { x >>= 32; r += 32; } 1020 if (x >> 32) { x >>= 32; r += 32; }
764 1021
765 return r + ecb_ld32 (x); 1022 return r + ecb_ld32 (x);
1023#endif
766 } 1024 }
767#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}
768 1061
769/* popcount64 is only available on 64 bit cpus as gcc builtin */ 1062/* popcount64 is only available on 64 bit cpus as gcc builtin */
770/* so for this version we are lazy */ 1063/* so for this version we are lazy */
771ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 1064ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
772ecb_function_ int 1065ecb_function_ ecb_const int
773ecb_popcount64 (uint64_t x) 1066ecb_popcount64 (uint64_t x)
774{ 1067{
775 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 1068 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
776} 1069}
777 1070
778ecb_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);
779ecb_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);
780ecb_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);
781ecb_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);
782ecb_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);
783ecb_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);
784ecb_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);
785ecb_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);
786 1079
787ecb_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); }
788ecb_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); }
789ecb_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); }
790ecb_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); }
791ecb_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); }
792ecb_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); }
793ecb_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); }
794ecb_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); }
795 1088
796#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
797 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1093 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1094 #endif
798 #define ecb_bswap32(x) __builtin_bswap32 (x) 1095 #define ecb_bswap32(x) __builtin_bswap32 (x)
799 #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)))
800#else 1102#else
801 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 1103 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
802 ecb_function_ uint16_t 1104 ecb_function_ ecb_const uint16_t
803 ecb_bswap16 (uint16_t x) 1105 ecb_bswap16 (uint16_t x)
804 { 1106 {
805 return ecb_rotl16 (x, 8); 1107 return ecb_rotl16 (x, 8);
806 } 1108 }
807 1109
808 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 1110 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
809 ecb_function_ uint32_t 1111 ecb_function_ ecb_const uint32_t
810 ecb_bswap32 (uint32_t x) 1112 ecb_bswap32 (uint32_t x)
811 { 1113 {
812 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 1114 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
813 } 1115 }
814 1116
815 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 1117 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
816 ecb_function_ uint64_t 1118 ecb_function_ ecb_const uint64_t
817 ecb_bswap64 (uint64_t x) 1119 ecb_bswap64 (uint64_t x)
818 { 1120 {
819 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 1121 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
820 } 1122 }
821#endif 1123#endif
822 1124
823#if ECB_GCC_VERSION(4,5) 1125#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
824 #define ecb_unreachable() __builtin_unreachable () 1126 #define ecb_unreachable() __builtin_unreachable ()
825#else 1127#else
826 /* 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 :/ */
827 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 1129 ecb_inline ecb_noreturn void ecb_unreachable (void);
828 ecb_function_ void ecb_unreachable (void) { } 1130 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
829#endif 1131#endif
830 1132
831/* try to tell the compiler that some condition is definitely true */ 1133/* try to tell the compiler that some condition is definitely true */
832#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 1134#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
833 1135
834ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 1136ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
835ecb_function_ unsigned char 1137ecb_inline ecb_const uint32_t
836ecb_byteorder_helper (void) 1138ecb_byteorder_helper (void)
837{ 1139{
838 const uint32_t u = 0x11223344; 1140 /* the union code still generates code under pressure in gcc, */
839 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
840} 1162}
841 1163
842ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 1164ecb_inline ecb_const ecb_bool ecb_big_endian (void);
843ecb_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; }
844ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 1166ecb_inline ecb_const ecb_bool ecb_little_endian (void);
845ecb_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; }
846 1168
847#if ECB_GCC_VERSION(3,0) || ECB_C99 1169#if ECB_GCC_VERSION(3,0) || ECB_C99
848 #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))
849#else 1171#else
850 #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))
851#endif 1189#endif
852 1190
853#if ecb_cplusplus_does_not_suck 1191#if ecb_cplusplus_does_not_suck
854 /* 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) */
855 template<typename T, int N> 1193 template<typename T, int N>
… …
859 } 1197 }
860#else 1198#else
861 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1199 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
862#endif 1200#endif
863 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
864#endif 1507#endif
865 1508
866/* ECB.H END */ 1509/* ECB.H END */
867 1510
868#if ECB_MEMORY_FENCE_NEEDS_PTHREADS 1511#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1512/* if your architecture doesn't need memory fences, e.g. because it is
1513 * single-cpu/core, or if you use libev in a project that doesn't use libev
1514 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1515 * libev, in which cases the memory fences become nops.
1516 * alternatively, you can remove this #error and link against libpthread,
1517 * which will then provide the memory fences.
1518 */
1519# error "memory fences not defined for your architecture, please report"
1520#endif
1521
869# undef ECB_MEMORY_FENCE 1522#ifndef ECB_MEMORY_FENCE
870# undef ECB_MEMORY_FENCE_ACQUIRE 1523# define ECB_MEMORY_FENCE do { } while (0)
871# undef ECB_MEMORY_FENCE_RELEASE 1524# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1525# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
872#endif 1526#endif
873 1527
874#define expect_false(cond) ecb_expect_false (cond) 1528#define expect_false(cond) ecb_expect_false (cond)
875#define expect_true(cond) ecb_expect_true (cond) 1529#define expect_true(cond) ecb_expect_true (cond)
876#define noinline ecb_noinline 1530#define noinline ecb_noinline
… …
878#define inline_size ecb_inline 1532#define inline_size ecb_inline
879 1533
880#if EV_FEATURE_CODE 1534#if EV_FEATURE_CODE
881# define inline_speed ecb_inline 1535# define inline_speed ecb_inline
882#else 1536#else
883# define inline_speed static noinline 1537# define inline_speed noinline static
884#endif 1538#endif
885 1539
886#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1540#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
887 1541
888#if EV_MINPRI == EV_MAXPRI 1542#if EV_MINPRI == EV_MAXPRI
… …
935#else 1589#else
936 1590
937#include <float.h> 1591#include <float.h>
938 1592
939/* a floor() replacement function, should be independent of ev_tstamp type */ 1593/* a floor() replacement function, should be independent of ev_tstamp type */
1594noinline
940static ev_tstamp noinline 1595static ev_tstamp
941ev_floor (ev_tstamp v) 1596ev_floor (ev_tstamp v)
942{ 1597{
943 /* the choice of shift factor is not terribly important */ 1598 /* the choice of shift factor is not terribly important */
944#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1599#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
945 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1600 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
… …
977 1632
978#ifdef __linux 1633#ifdef __linux
979# include <sys/utsname.h> 1634# include <sys/utsname.h>
980#endif 1635#endif
981 1636
982static unsigned int noinline ecb_cold 1637noinline ecb_cold
1638static unsigned int
983ev_linux_version (void) 1639ev_linux_version (void)
984{ 1640{
985#ifdef __linux 1641#ifdef __linux
986 unsigned int v = 0; 1642 unsigned int v = 0;
987 struct utsname buf; 1643 struct utsname buf;
… …
1016} 1672}
1017 1673
1018/*****************************************************************************/ 1674/*****************************************************************************/
1019 1675
1020#if EV_AVOID_STDIO 1676#if EV_AVOID_STDIO
1021static void noinline ecb_cold 1677noinline ecb_cold
1678static void
1022ev_printerr (const char *msg) 1679ev_printerr (const char *msg)
1023{ 1680{
1024 write (STDERR_FILENO, msg, strlen (msg)); 1681 write (STDERR_FILENO, msg, strlen (msg));
1025} 1682}
1026#endif 1683#endif
1027 1684
1028static void (*syserr_cb)(const char *msg); 1685static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
1029 1686
1030void ecb_cold 1687ecb_cold
1688void
1031ev_set_syserr_cb (void (*cb)(const char *msg)) 1689ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
1032{ 1690{
1033 syserr_cb = cb; 1691 syserr_cb = cb;
1034} 1692}
1035 1693
1036static void noinline ecb_cold 1694noinline ecb_cold
1695static void
1037ev_syserr (const char *msg) 1696ev_syserr (const char *msg)
1038{ 1697{
1039 if (!msg) 1698 if (!msg)
1040 msg = "(libev) system error"; 1699 msg = "(libev) system error";
1041 1700
… …
1054 abort (); 1713 abort ();
1055 } 1714 }
1056} 1715}
1057 1716
1058static void * 1717static void *
1059ev_realloc_emul (void *ptr, long size) 1718ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
1060{ 1719{
1061#if __GLIBC__
1062 return realloc (ptr, size);
1063#else
1064 /* some systems, notably openbsd and darwin, fail to properly 1720 /* some systems, notably openbsd and darwin, fail to properly
1065 * 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
1066 * 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.
1067 */ 1725 */
1068 1726
1069 if (size) 1727 if (size)
1070 return realloc (ptr, size); 1728 return realloc (ptr, size);
1071 1729
1072 free (ptr); 1730 free (ptr);
1073 return 0; 1731 return 0;
1074#endif
1075} 1732}
1076 1733
1077static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1734static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
1078 1735
1079void ecb_cold 1736ecb_cold
1737void
1080ev_set_allocator (void *(*cb)(void *ptr, long size)) 1738ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
1081{ 1739{
1082 alloc = cb; 1740 alloc = cb;
1083} 1741}
1084 1742
1085inline_speed void * 1743inline_speed void *
… …
1173 #undef VAR 1831 #undef VAR
1174 }; 1832 };
1175 #include "ev_wrap.h" 1833 #include "ev_wrap.h"
1176 1834
1177 static struct ev_loop default_loop_struct; 1835 static struct ev_loop default_loop_struct;
1178 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 */
1179 1837
1180#else 1838#else
1181 1839
1182 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 */
1183 #define VAR(name,decl) static decl; 1841 #define VAR(name,decl) static decl;
1184 #include "ev_vars.h" 1842 #include "ev_vars.h"
1185 #undef VAR 1843 #undef VAR
1186 1844
1187 static int ev_default_loop_ptr; 1845 static int ev_default_loop_ptr;
… …
1202 1860
1203/*****************************************************************************/ 1861/*****************************************************************************/
1204 1862
1205#ifndef EV_HAVE_EV_TIME 1863#ifndef EV_HAVE_EV_TIME
1206ev_tstamp 1864ev_tstamp
1207ev_time (void) 1865ev_time (void) EV_NOEXCEPT
1208{ 1866{
1209#if EV_USE_REALTIME 1867#if EV_USE_REALTIME
1210 if (expect_true (have_realtime)) 1868 if (expect_true (have_realtime))
1211 { 1869 {
1212 struct timespec ts; 1870 struct timespec ts;
… …
1236 return ev_time (); 1894 return ev_time ();
1237} 1895}
1238 1896
1239#if EV_MULTIPLICITY 1897#if EV_MULTIPLICITY
1240ev_tstamp 1898ev_tstamp
1241ev_now (EV_P) 1899ev_now (EV_P) EV_NOEXCEPT
1242{ 1900{
1243 return ev_rt_now; 1901 return ev_rt_now;
1244} 1902}
1245#endif 1903#endif
1246 1904
1247void 1905void
1248ev_sleep (ev_tstamp delay) 1906ev_sleep (ev_tstamp delay) EV_NOEXCEPT
1249{ 1907{
1250 if (delay > 0.) 1908 if (delay > 0.)
1251 { 1909 {
1252#if EV_USE_NANOSLEEP 1910#if EV_USE_NANOSLEEP
1253 struct timespec ts; 1911 struct timespec ts;
1254 1912
1255 EV_TS_SET (ts, delay); 1913 EV_TS_SET (ts, delay);
1256 nanosleep (&ts, 0); 1914 nanosleep (&ts, 0);
1257#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) */
1258 Sleep ((unsigned long)(delay * 1e3)); 1918 Sleep ((unsigned long)(delay * 1e3));
1259#else 1919#else
1260 struct timeval tv; 1920 struct timeval tv;
1261 1921
1262 /* 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 */
… …
1281 1941
1282 do 1942 do
1283 ncur <<= 1; 1943 ncur <<= 1;
1284 while (cnt > ncur); 1944 while (cnt > ncur);
1285 1945
1286 /* 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 */
1287 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1947 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1288 { 1948 {
1289 ncur *= elem; 1949 ncur *= elem;
1290 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);
1291 ncur = ncur - sizeof (void *) * 4; 1951 ncur = ncur - sizeof (void *) * 4;
… …
1293 } 1953 }
1294 1954
1295 return ncur; 1955 return ncur;
1296} 1956}
1297 1957
1298static void * noinline ecb_cold 1958noinline ecb_cold
1959static void *
1299array_realloc (int elem, void *base, int *cur, int cnt) 1960array_realloc (int elem, void *base, int *cur, int cnt)
1300{ 1961{
1301 *cur = array_nextsize (elem, *cur, cnt); 1962 *cur = array_nextsize (elem, *cur, cnt);
1302 return ev_realloc (base, elem * *cur); 1963 return ev_realloc (base, elem * *cur);
1303} 1964}
… …
1306 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1967 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1307 1968
1308#define array_needsize(type,base,cur,cnt,init) \ 1969#define array_needsize(type,base,cur,cnt,init) \
1309 if (expect_false ((cnt) > (cur))) \ 1970 if (expect_false ((cnt) > (cur))) \
1310 { \ 1971 { \
1311 int ecb_unused ocur_ = (cur); \ 1972 ecb_unused int ocur_ = (cur); \
1312 (base) = (type *)array_realloc \ 1973 (base) = (type *)array_realloc \
1313 (sizeof (type), (base), &(cur), (cnt)); \ 1974 (sizeof (type), (base), &(cur), (cnt)); \
1314 init ((base) + (ocur_), (cur) - ocur_); \ 1975 init ((base) + (ocur_), (cur) - ocur_); \
1315 } 1976 }
1316 1977
… …
1328 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
1329 1990
1330/*****************************************************************************/ 1991/*****************************************************************************/
1331 1992
1332/* dummy callback for pending events */ 1993/* dummy callback for pending events */
1333static void noinline 1994noinline
1995static void
1334pendingcb (EV_P_ ev_prepare *w, int revents) 1996pendingcb (EV_P_ ev_prepare *w, int revents)
1335{ 1997{
1336} 1998}
1337 1999
1338void noinline 2000noinline
2001void
1339ev_feed_event (EV_P_ void *w, int revents) 2002ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
1340{ 2003{
1341 W w_ = (W)w; 2004 W w_ = (W)w;
1342 int pri = ABSPRI (w_); 2005 int pri = ABSPRI (w_);
1343 2006
1344 if (expect_false (w_->pending)) 2007 if (expect_false (w_->pending))
… …
1348 w_->pending = ++pendingcnt [pri]; 2011 w_->pending = ++pendingcnt [pri];
1349 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2012 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1350 pendings [pri][w_->pending - 1].w = w_; 2013 pendings [pri][w_->pending - 1].w = w_;
1351 pendings [pri][w_->pending - 1].events = revents; 2014 pendings [pri][w_->pending - 1].events = revents;
1352 } 2015 }
2016
2017 pendingpri = NUMPRI - 1;
1353} 2018}
1354 2019
1355inline_speed void 2020inline_speed void
1356feed_reverse (EV_P_ W w) 2021feed_reverse (EV_P_ W w)
1357{ 2022{
… …
1403 if (expect_true (!anfd->reify)) 2068 if (expect_true (!anfd->reify))
1404 fd_event_nocheck (EV_A_ fd, revents); 2069 fd_event_nocheck (EV_A_ fd, revents);
1405} 2070}
1406 2071
1407void 2072void
1408ev_feed_fd_event (EV_P_ int fd, int revents) 2073ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1409{ 2074{
1410 if (fd >= 0 && fd < anfdmax) 2075 if (fd >= 0 && fd < anfdmax)
1411 fd_event_nocheck (EV_A_ fd, revents); 2076 fd_event_nocheck (EV_A_ fd, revents);
1412} 2077}
1413 2078
… …
1471 2136
1472 fdchangecnt = 0; 2137 fdchangecnt = 0;
1473} 2138}
1474 2139
1475/* something about the given fd changed */ 2140/* something about the given fd changed */
1476inline_size void 2141inline_size
2142void
1477fd_change (EV_P_ int fd, int flags) 2143fd_change (EV_P_ int fd, int flags)
1478{ 2144{
1479 unsigned char reify = anfds [fd].reify; 2145 unsigned char reify = anfds [fd].reify;
1480 anfds [fd].reify |= flags; 2146 anfds [fd].reify |= flags;
1481 2147
… …
1486 fdchanges [fdchangecnt - 1] = fd; 2152 fdchanges [fdchangecnt - 1] = fd;
1487 } 2153 }
1488} 2154}
1489 2155
1490/* 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 */
1491inline_speed void ecb_cold 2157inline_speed ecb_cold void
1492fd_kill (EV_P_ int fd) 2158fd_kill (EV_P_ int fd)
1493{ 2159{
1494 ev_io *w; 2160 ev_io *w;
1495 2161
1496 while ((w = (ev_io *)anfds [fd].head)) 2162 while ((w = (ev_io *)anfds [fd].head))
… …
1499 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);
1500 } 2166 }
1501} 2167}
1502 2168
1503/* check whether the given fd is actually valid, for error recovery */ 2169/* check whether the given fd is actually valid, for error recovery */
1504inline_size int ecb_cold 2170inline_size ecb_cold int
1505fd_valid (int fd) 2171fd_valid (int fd)
1506{ 2172{
1507#ifdef _WIN32 2173#ifdef _WIN32
1508 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2174 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1509#else 2175#else
1510 return fcntl (fd, F_GETFD) != -1; 2176 return fcntl (fd, F_GETFD) != -1;
1511#endif 2177#endif
1512} 2178}
1513 2179
1514/* called on EBADF to verify fds */ 2180/* called on EBADF to verify fds */
1515static void noinline ecb_cold 2181noinline ecb_cold
2182static void
1516fd_ebadf (EV_P) 2183fd_ebadf (EV_P)
1517{ 2184{
1518 int fd; 2185 int fd;
1519 2186
1520 for (fd = 0; fd < anfdmax; ++fd) 2187 for (fd = 0; fd < anfdmax; ++fd)
… …
1522 if (!fd_valid (fd) && errno == EBADF) 2189 if (!fd_valid (fd) && errno == EBADF)
1523 fd_kill (EV_A_ fd); 2190 fd_kill (EV_A_ fd);
1524} 2191}
1525 2192
1526/* 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 */
1527static void noinline ecb_cold 2194noinline ecb_cold
2195static void
1528fd_enomem (EV_P) 2196fd_enomem (EV_P)
1529{ 2197{
1530 int fd; 2198 int fd;
1531 2199
1532 for (fd = anfdmax; fd--; ) 2200 for (fd = anfdmax; fd--; )
… …
1536 break; 2204 break;
1537 } 2205 }
1538} 2206}
1539 2207
1540/* 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 */
1541static void noinline 2209noinline
2210static void
1542fd_rearm_all (EV_P) 2211fd_rearm_all (EV_P)
1543{ 2212{
1544 int fd; 2213 int fd;
1545 2214
1546 for (fd = 0; fd < anfdmax; ++fd) 2215 for (fd = 0; fd < anfdmax; ++fd)
… …
1727 2396
1728/*****************************************************************************/ 2397/*****************************************************************************/
1729 2398
1730#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2399#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1731 2400
1732static void noinline ecb_cold 2401noinline ecb_cold
2402static void
1733evpipe_init (EV_P) 2403evpipe_init (EV_P)
1734{ 2404{
1735 if (!ev_is_active (&pipe_w)) 2405 if (!ev_is_active (&pipe_w))
1736 { 2406 {
2407 int fds [2];
2408
1737# if EV_USE_EVENTFD 2409# if EV_USE_EVENTFD
2410 fds [0] = -1;
1738 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2411 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1739 if (evfd < 0 && errno == EINVAL) 2412 if (fds [1] < 0 && errno == EINVAL)
1740 evfd = eventfd (0, 0); 2413 fds [1] = eventfd (0, 0);
1741 2414
1742 if (evfd >= 0) 2415 if (fds [1] < 0)
2416# endif
1743 { 2417 {
2418 while (pipe (fds))
2419 ev_syserr ("(libev) error creating signal/async pipe");
2420
2421 fd_intern (fds [0]);
2422 }
2423
1744 evpipe [0] = -1; 2424 evpipe [0] = fds [0];
1745 fd_intern (evfd); /* doing it twice doesn't hurt */ 2425
1746 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));
1747 } 2476 }
1748 else 2477 else
1749# endif 2478#endif
1750 { 2479 {
1751 while (pipe (evpipe)) 2480#ifdef _WIN32
1752 ev_syserr ("(libev) error creating signal/async pipe"); 2481 WSABUF buf;
1753 2482 DWORD sent;
1754 fd_intern (evpipe [0]); 2483 buf.buf = (char *)&buf;
1755 fd_intern (evpipe [1]); 2484 buf.len = 1;
1756 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2485 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1757 } 2486#else
1758
1759 ev_io_start (EV_A_ &pipe_w);
1760 ev_unref (EV_A); /* watcher should not keep loop alive */
1761 }
1762}
1763
1764inline_speed void
1765evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1766{
1767 if (expect_true (*flag))
1768 return;
1769
1770 *flag = 1;
1771
1772 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1773
1774 pipe_write_skipped = 1;
1775
1776 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1777
1778 if (pipe_write_wanted)
1779 {
1780 int old_errno;
1781
1782 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1783
1784 old_errno = errno; /* save errno because write will clobber it */
1785
1786#if EV_USE_EVENTFD
1787 if (evfd >= 0)
1788 {
1789 uint64_t counter = 1;
1790 write (evfd, &counter, sizeof (uint64_t));
1791 }
1792 else
1793#endif
1794 {
1795 /* win32 people keep sending patches that change this write() to send() */
1796 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1797 /* so when you think this write should be a send instead, please find out */
1798 /* where your send() is from - it's definitely not the microsoft send, and */
1799 /* tell me. thank you. */
1800 write (evpipe [1], &(evpipe [1]), 1); 2487 write (evpipe [1], &(evpipe [1]), 1);
2488#endif
1801 } 2489 }
1802 2490
1803 errno = old_errno; 2491 errno = old_errno;
1804 } 2492 }
1805} 2493}
… …
1812 int i; 2500 int i;
1813 2501
1814 if (revents & EV_READ) 2502 if (revents & EV_READ)
1815 { 2503 {
1816#if EV_USE_EVENTFD 2504#if EV_USE_EVENTFD
1817 if (evfd >= 0) 2505 if (evpipe [0] < 0)
1818 { 2506 {
1819 uint64_t counter; 2507 uint64_t counter;
1820 read (evfd, &counter, sizeof (uint64_t)); 2508 read (evpipe [1], &counter, sizeof (uint64_t));
1821 } 2509 }
1822 else 2510 else
1823#endif 2511#endif
1824 { 2512 {
1825 char dummy; 2513 char dummy[4];
1826 /* 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
1827 read (evpipe [0], &dummy, 1); 2522 read (evpipe [0], &dummy, sizeof (dummy));
2523#endif
1828 } 2524 }
1829 } 2525 }
1830 2526
1831 pipe_write_skipped = 0; 2527 pipe_write_skipped = 0;
2528
2529 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1832 2530
1833#if EV_SIGNAL_ENABLE 2531#if EV_SIGNAL_ENABLE
1834 if (sig_pending) 2532 if (sig_pending)
1835 { 2533 {
1836 sig_pending = 0; 2534 sig_pending = 0;
2535
2536 ECB_MEMORY_FENCE;
1837 2537
1838 for (i = EV_NSIG - 1; i--; ) 2538 for (i = EV_NSIG - 1; i--; )
1839 if (expect_false (signals [i].pending)) 2539 if (expect_false (signals [i].pending))
1840 ev_feed_signal_event (EV_A_ i + 1); 2540 ev_feed_signal_event (EV_A_ i + 1);
1841 } 2541 }
… …
1843 2543
1844#if EV_ASYNC_ENABLE 2544#if EV_ASYNC_ENABLE
1845 if (async_pending) 2545 if (async_pending)
1846 { 2546 {
1847 async_pending = 0; 2547 async_pending = 0;
2548
2549 ECB_MEMORY_FENCE;
1848 2550
1849 for (i = asynccnt; i--; ) 2551 for (i = asynccnt; i--; )
1850 if (asyncs [i]->sent) 2552 if (asyncs [i]->sent)
1851 { 2553 {
1852 asyncs [i]->sent = 0; 2554 asyncs [i]->sent = 0;
2555 ECB_MEMORY_FENCE_RELEASE;
1853 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2556 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1854 } 2557 }
1855 } 2558 }
1856#endif 2559#endif
1857} 2560}
1858 2561
1859/*****************************************************************************/ 2562/*****************************************************************************/
1860 2563
1861void 2564void
1862ev_feed_signal (int signum) 2565ev_feed_signal (int signum) EV_NOEXCEPT
1863{ 2566{
1864#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
2568 EV_P;
2569 ECB_MEMORY_FENCE_ACQUIRE;
1865 EV_P = signals [signum - 1].loop; 2570 EV_A = signals [signum - 1].loop;
1866 2571
1867 if (!EV_A) 2572 if (!EV_A)
1868 return; 2573 return;
1869#endif 2574#endif
1870 2575
1871 if (!ev_active (&pipe_w))
1872 return;
1873
1874 signals [signum - 1].pending = 1; 2576 signals [signum - 1].pending = 1;
1875 evpipe_write (EV_A_ &sig_pending); 2577 evpipe_write (EV_A_ &sig_pending);
1876} 2578}
1877 2579
1878static void 2580static void
… …
1883#endif 2585#endif
1884 2586
1885 ev_feed_signal (signum); 2587 ev_feed_signal (signum);
1886} 2588}
1887 2589
1888void noinline 2590noinline
2591void
1889ev_feed_signal_event (EV_P_ int signum) 2592ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1890{ 2593{
1891 WL w; 2594 WL w;
1892 2595
1893 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2596 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1894 return; 2597 return;
1895 2598
1896 --signum; 2599 --signum;
1897 2600
1898#if EV_MULTIPLICITY 2601#if EV_MULTIPLICITY
… …
1902 if (expect_false (signals [signum].loop != EV_A)) 2605 if (expect_false (signals [signum].loop != EV_A))
1903 return; 2606 return;
1904#endif 2607#endif
1905 2608
1906 signals [signum].pending = 0; 2609 signals [signum].pending = 0;
2610 ECB_MEMORY_FENCE_RELEASE;
1907 2611
1908 for (w = signals [signum].head; w; w = w->next) 2612 for (w = signals [signum].head; w; w = w->next)
1909 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2613 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1910} 2614}
1911 2615
… …
2009#endif 2713#endif
2010#if EV_USE_SELECT 2714#if EV_USE_SELECT
2011# include "ev_select.c" 2715# include "ev_select.c"
2012#endif 2716#endif
2013 2717
2014int ecb_cold 2718ecb_cold int
2015ev_version_major (void) 2719ev_version_major (void) EV_NOEXCEPT
2016{ 2720{
2017 return EV_VERSION_MAJOR; 2721 return EV_VERSION_MAJOR;
2018} 2722}
2019 2723
2020int ecb_cold 2724ecb_cold int
2021ev_version_minor (void) 2725ev_version_minor (void) EV_NOEXCEPT
2022{ 2726{
2023 return EV_VERSION_MINOR; 2727 return EV_VERSION_MINOR;
2024} 2728}
2025 2729
2026/* 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 */
2027int inline_size ecb_cold 2731inline_size ecb_cold int
2028enable_secure (void) 2732enable_secure (void)
2029{ 2733{
2030#ifdef _WIN32 2734#ifdef _WIN32
2031 return 0; 2735 return 0;
2032#else 2736#else
2033 return getuid () != geteuid () 2737 return getuid () != geteuid ()
2034 || getgid () != getegid (); 2738 || getgid () != getegid ();
2035#endif 2739#endif
2036} 2740}
2037 2741
2038unsigned int ecb_cold 2742ecb_cold
2743unsigned int
2039ev_supported_backends (void) 2744ev_supported_backends (void) EV_NOEXCEPT
2040{ 2745{
2041 unsigned int flags = 0; 2746 unsigned int flags = 0;
2042 2747
2043 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2748 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2044 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2749 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
2047 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2752 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2048 2753
2049 return flags; 2754 return flags;
2050} 2755}
2051 2756
2052unsigned int ecb_cold 2757ecb_cold
2758unsigned int
2053ev_recommended_backends (void) 2759ev_recommended_backends (void) EV_NOEXCEPT
2054{ 2760{
2055 unsigned int flags = ev_supported_backends (); 2761 unsigned int flags = ev_supported_backends ();
2056 2762
2057#ifndef __NetBSD__ 2763#ifndef __NetBSD__
2058 /* kqueue is borked on everything but netbsd apparently */ 2764 /* kqueue is borked on everything but netbsd apparently */
… …
2069#endif 2775#endif
2070 2776
2071 return flags; 2777 return flags;
2072} 2778}
2073 2779
2074unsigned int ecb_cold 2780ecb_cold
2781unsigned int
2075ev_embeddable_backends (void) 2782ev_embeddable_backends (void) EV_NOEXCEPT
2076{ 2783{
2077 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2784 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2078 2785
2079 /* 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 */
2080 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 */
… …
2082 2789
2083 return flags; 2790 return flags;
2084} 2791}
2085 2792
2086unsigned int 2793unsigned int
2087ev_backend (EV_P) 2794ev_backend (EV_P) EV_NOEXCEPT
2088{ 2795{
2089 return backend; 2796 return backend;
2090} 2797}
2091 2798
2092#if EV_FEATURE_API 2799#if EV_FEATURE_API
2093unsigned int 2800unsigned int
2094ev_iteration (EV_P) 2801ev_iteration (EV_P) EV_NOEXCEPT
2095{ 2802{
2096 return loop_count; 2803 return loop_count;
2097} 2804}
2098 2805
2099unsigned int 2806unsigned int
2100ev_depth (EV_P) 2807ev_depth (EV_P) EV_NOEXCEPT
2101{ 2808{
2102 return loop_depth; 2809 return loop_depth;
2103} 2810}
2104 2811
2105void 2812void
2106ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2813ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2107{ 2814{
2108 io_blocktime = interval; 2815 io_blocktime = interval;
2109} 2816}
2110 2817
2111void 2818void
2112ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2819ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2113{ 2820{
2114 timeout_blocktime = interval; 2821 timeout_blocktime = interval;
2115} 2822}
2116 2823
2117void 2824void
2118ev_set_userdata (EV_P_ void *data) 2825ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2119{ 2826{
2120 userdata = data; 2827 userdata = data;
2121} 2828}
2122 2829
2123void * 2830void *
2124ev_userdata (EV_P) 2831ev_userdata (EV_P) EV_NOEXCEPT
2125{ 2832{
2126 return userdata; 2833 return userdata;
2127} 2834}
2128 2835
2129void 2836void
2130ev_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
2131{ 2838{
2132 invoke_cb = invoke_pending_cb; 2839 invoke_cb = invoke_pending_cb;
2133} 2840}
2134 2841
2135void 2842void
2136ev_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
2137{ 2844{
2138 release_cb = release; 2845 release_cb = release;
2139 acquire_cb = acquire; 2846 acquire_cb = acquire;
2140} 2847}
2141#endif 2848#endif
2142 2849
2143/* initialise a loop structure, must be zero-initialised */ 2850/* initialise a loop structure, must be zero-initialised */
2144static void noinline ecb_cold 2851noinline ecb_cold
2852static void
2145loop_init (EV_P_ unsigned int flags) 2853loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
2146{ 2854{
2147 if (!backend) 2855 if (!backend)
2148 { 2856 {
2149 origflags = flags; 2857 origflags = flags;
2150 2858
… …
2195#if EV_ASYNC_ENABLE 2903#if EV_ASYNC_ENABLE
2196 async_pending = 0; 2904 async_pending = 0;
2197#endif 2905#endif
2198 pipe_write_skipped = 0; 2906 pipe_write_skipped = 0;
2199 pipe_write_wanted = 0; 2907 pipe_write_wanted = 0;
2908 evpipe [0] = -1;
2909 evpipe [1] = -1;
2200#if EV_USE_INOTIFY 2910#if EV_USE_INOTIFY
2201 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2911 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2202#endif 2912#endif
2203#if EV_USE_SIGNALFD 2913#if EV_USE_SIGNALFD
2204 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2914 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
2234#endif 2944#endif
2235 } 2945 }
2236} 2946}
2237 2947
2238/* free up a loop structure */ 2948/* free up a loop structure */
2239void ecb_cold 2949ecb_cold
2950void
2240ev_loop_destroy (EV_P) 2951ev_loop_destroy (EV_P)
2241{ 2952{
2242 int i; 2953 int i;
2243 2954
2244#if EV_MULTIPLICITY 2955#if EV_MULTIPLICITY
… …
2255 EV_INVOKE_PENDING; 2966 EV_INVOKE_PENDING;
2256 } 2967 }
2257#endif 2968#endif
2258 2969
2259#if EV_CHILD_ENABLE 2970#if EV_CHILD_ENABLE
2260 if (ev_is_active (&childev)) 2971 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2261 { 2972 {
2262 ev_ref (EV_A); /* child watcher */ 2973 ev_ref (EV_A); /* child watcher */
2263 ev_signal_stop (EV_A_ &childev); 2974 ev_signal_stop (EV_A_ &childev);
2264 } 2975 }
2265#endif 2976#endif
… …
2267 if (ev_is_active (&pipe_w)) 2978 if (ev_is_active (&pipe_w))
2268 { 2979 {
2269 /*ev_ref (EV_A);*/ 2980 /*ev_ref (EV_A);*/
2270 /*ev_io_stop (EV_A_ &pipe_w);*/ 2981 /*ev_io_stop (EV_A_ &pipe_w);*/
2271 2982
2272#if EV_USE_EVENTFD
2273 if (evfd >= 0)
2274 close (evfd);
2275#endif
2276
2277 if (evpipe [0] >= 0)
2278 {
2279 EV_WIN32_CLOSE_FD (evpipe [0]); 2983 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2280 EV_WIN32_CLOSE_FD (evpipe [1]); 2984 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2281 }
2282 } 2985 }
2283 2986
2284#if EV_USE_SIGNALFD 2987#if EV_USE_SIGNALFD
2285 if (ev_is_active (&sigfd_w)) 2988 if (ev_is_active (&sigfd_w))
2286 close (sigfd); 2989 close (sigfd);
… …
2372#endif 3075#endif
2373#if EV_USE_INOTIFY 3076#if EV_USE_INOTIFY
2374 infy_fork (EV_A); 3077 infy_fork (EV_A);
2375#endif 3078#endif
2376 3079
3080#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2377 if (ev_is_active (&pipe_w)) 3081 if (ev_is_active (&pipe_w) && postfork != 2)
2378 { 3082 {
2379 /* 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 */
2380 3084
2381 ev_ref (EV_A); 3085 ev_ref (EV_A);
2382 ev_io_stop (EV_A_ &pipe_w); 3086 ev_io_stop (EV_A_ &pipe_w);
2383 3087
2384#if EV_USE_EVENTFD
2385 if (evfd >= 0)
2386 close (evfd);
2387#endif
2388
2389 if (evpipe [0] >= 0) 3088 if (evpipe [0] >= 0)
2390 {
2391 EV_WIN32_CLOSE_FD (evpipe [0]); 3089 EV_WIN32_CLOSE_FD (evpipe [0]);
2392 EV_WIN32_CLOSE_FD (evpipe [1]);
2393 }
2394 3090
2395#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2396 evpipe_init (EV_A); 3091 evpipe_init (EV_A);
2397 /* now iterate over everything, in case we missed something */ 3092 /* iterate over everything, in case we missed something before */
2398 pipecb (EV_A_ &pipe_w, EV_READ); 3093 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2399#endif
2400 } 3094 }
3095#endif
2401 3096
2402 postfork = 0; 3097 postfork = 0;
2403} 3098}
2404 3099
2405#if EV_MULTIPLICITY 3100#if EV_MULTIPLICITY
2406 3101
3102ecb_cold
2407struct ev_loop * ecb_cold 3103struct ev_loop *
2408ev_loop_new (unsigned int flags) 3104ev_loop_new (unsigned int flags) EV_NOEXCEPT
2409{ 3105{
2410 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3106 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2411 3107
2412 memset (EV_A, 0, sizeof (struct ev_loop)); 3108 memset (EV_A, 0, sizeof (struct ev_loop));
2413 loop_init (EV_A_ flags); 3109 loop_init (EV_A_ flags);
… …
2420} 3116}
2421 3117
2422#endif /* multiplicity */ 3118#endif /* multiplicity */
2423 3119
2424#if EV_VERIFY 3120#if EV_VERIFY
2425static void noinline ecb_cold 3121noinline ecb_cold
3122static void
2426verify_watcher (EV_P_ W w) 3123verify_watcher (EV_P_ W w)
2427{ 3124{
2428 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));
2429 3126
2430 if (w->pending) 3127 if (w->pending)
2431 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));
2432} 3129}
2433 3130
2434static void noinline ecb_cold 3131noinline ecb_cold
3132static void
2435verify_heap (EV_P_ ANHE *heap, int N) 3133verify_heap (EV_P_ ANHE *heap, int N)
2436{ 3134{
2437 int i; 3135 int i;
2438 3136
2439 for (i = HEAP0; i < N + HEAP0; ++i) 3137 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2444 3142
2445 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2446 } 3144 }
2447} 3145}
2448 3146
2449static void noinline ecb_cold 3147noinline ecb_cold
3148static void
2450array_verify (EV_P_ W *ws, int cnt) 3149array_verify (EV_P_ W *ws, int cnt)
2451{ 3150{
2452 while (cnt--) 3151 while (cnt--)
2453 { 3152 {
2454 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2457} 3156}
2458#endif 3157#endif
2459 3158
2460#if EV_FEATURE_API 3159#if EV_FEATURE_API
2461void ecb_cold 3160void ecb_cold
2462ev_verify (EV_P) 3161ev_verify (EV_P) EV_NOEXCEPT
2463{ 3162{
2464#if EV_VERIFY 3163#if EV_VERIFY
2465 int i; 3164 int i;
2466 WL w; 3165 WL w, w2;
2467 3166
2468 assert (activecnt >= -1); 3167 assert (activecnt >= -1);
2469 3168
2470 assert (fdchangemax >= fdchangecnt); 3169 assert (fdchangemax >= fdchangecnt);
2471 for (i = 0; i < fdchangecnt; ++i) 3170 for (i = 0; i < fdchangecnt; ++i)
2472 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2473 3172
2474 assert (anfdmax >= 0); 3173 assert (anfdmax >= 0);
2475 for (i = 0; i < anfdmax; ++i) 3174 for (i = 0; i < anfdmax; ++i)
3175 {
3176 int j = 0;
3177
2476 for (w = anfds [i].head; w; w = w->next) 3178 for (w = w2 = anfds [i].head; w; w = w->next)
2477 { 3179 {
2478 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
2479 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));
2480 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));
2481 } 3190 }
3191 }
2482 3192
2483 assert (timermax >= timercnt); 3193 assert (timermax >= timercnt);
2484 verify_heap (EV_A_ timers, timercnt); 3194 verify_heap (EV_A_ timers, timercnt);
2485 3195
2486#if EV_PERIODIC_ENABLE 3196#if EV_PERIODIC_ENABLE
… …
2532#endif 3242#endif
2533} 3243}
2534#endif 3244#endif
2535 3245
2536#if EV_MULTIPLICITY 3246#if EV_MULTIPLICITY
3247ecb_cold
2537struct ev_loop * ecb_cold 3248struct ev_loop *
2538#else 3249#else
2539int 3250int
2540#endif 3251#endif
2541ev_default_loop (unsigned int flags) 3252ev_default_loop (unsigned int flags) EV_NOEXCEPT
2542{ 3253{
2543 if (!ev_default_loop_ptr) 3254 if (!ev_default_loop_ptr)
2544 { 3255 {
2545#if EV_MULTIPLICITY 3256#if EV_MULTIPLICITY
2546 EV_P = ev_default_loop_ptr = &default_loop_struct; 3257 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2565 3276
2566 return ev_default_loop_ptr; 3277 return ev_default_loop_ptr;
2567} 3278}
2568 3279
2569void 3280void
2570ev_loop_fork (EV_P) 3281ev_loop_fork (EV_P) EV_NOEXCEPT
2571{ 3282{
2572 postfork = 1; /* must be in line with ev_default_fork */ 3283 postfork = 1;
2573} 3284}
2574 3285
2575/*****************************************************************************/ 3286/*****************************************************************************/
2576 3287
2577void 3288void
… …
2579{ 3290{
2580 EV_CB_INVOKE ((W)w, revents); 3291 EV_CB_INVOKE ((W)w, revents);
2581} 3292}
2582 3293
2583unsigned int 3294unsigned int
2584ev_pending_count (EV_P) 3295ev_pending_count (EV_P) EV_NOEXCEPT
2585{ 3296{
2586 int pri; 3297 int pri;
2587 unsigned int count = 0; 3298 unsigned int count = 0;
2588 3299
2589 for (pri = NUMPRI; pri--; ) 3300 for (pri = NUMPRI; pri--; )
2590 count += pendingcnt [pri]; 3301 count += pendingcnt [pri];
2591 3302
2592 return count; 3303 return count;
2593} 3304}
2594 3305
2595void noinline 3306noinline
3307void
2596ev_invoke_pending (EV_P) 3308ev_invoke_pending (EV_P)
2597{ 3309{
2598 int pri; 3310 pendingpri = NUMPRI;
2599 3311
2600 for (pri = NUMPRI; pri--; ) 3312 do
3313 {
3314 --pendingpri;
3315
3316 /* pendingpri possibly gets modified in the inner loop */
2601 while (pendingcnt [pri]) 3317 while (pendingcnt [pendingpri])
2602 { 3318 {
2603 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3319 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2604 3320
2605 p->w->pending = 0; 3321 p->w->pending = 0;
2606 EV_CB_INVOKE (p->w, p->events); 3322 EV_CB_INVOKE (p->w, p->events);
2607 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
2608 } 3324 }
3325 }
3326 while (pendingpri);
2609} 3327}
2610 3328
2611#if EV_IDLE_ENABLE 3329#if EV_IDLE_ENABLE
2612/* make idle watchers pending. this handles the "call-idle */ 3330/* make idle watchers pending. this handles the "call-idle */
2613/* only when higher priorities are idle" logic */ 3331/* only when higher priorities are idle" logic */
… …
2671 } 3389 }
2672} 3390}
2673 3391
2674#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
2675 3393
2676static void noinline 3394noinline
3395static void
2677periodic_recalc (EV_P_ ev_periodic *w) 3396periodic_recalc (EV_P_ ev_periodic *w)
2678{ 3397{
2679 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3398 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2680 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);
2681 3400
… …
2703{ 3422{
2704 EV_FREQUENT_CHECK; 3423 EV_FREQUENT_CHECK;
2705 3424
2706 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3425 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2707 { 3426 {
2708 int feed_count = 0;
2709
2710 do 3427 do
2711 { 3428 {
2712 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3429 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2713 3430
2714 /*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)));*/
… …
2741 } 3458 }
2742} 3459}
2743 3460
2744/* simply recalculate all periodics */ 3461/* simply recalculate all periodics */
2745/* 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? */
2746static void noinline ecb_cold 3463noinline ecb_cold
3464static void
2747periodics_reschedule (EV_P) 3465periodics_reschedule (EV_P)
2748{ 3466{
2749 int i; 3467 int i;
2750 3468
2751 /* adjust periodics after time jump */ 3469 /* adjust periodics after time jump */
… …
2764 reheap (periodics, periodiccnt); 3482 reheap (periodics, periodiccnt);
2765} 3483}
2766#endif 3484#endif
2767 3485
2768/* adjust all timers by a given offset */ 3486/* adjust all timers by a given offset */
2769static void noinline ecb_cold 3487noinline ecb_cold
3488static void
2770timers_reschedule (EV_P_ ev_tstamp adjust) 3489timers_reschedule (EV_P_ ev_tstamp adjust)
2771{ 3490{
2772 int i; 3491 int i;
2773 3492
2774 for (i = 0; i < timercnt; ++i) 3493 for (i = 0; i < timercnt; ++i)
… …
2848 3567
2849 mn_now = ev_rt_now; 3568 mn_now = ev_rt_now;
2850 } 3569 }
2851} 3570}
2852 3571
2853void 3572int
2854ev_run (EV_P_ int flags) 3573ev_run (EV_P_ int flags)
2855{ 3574{
2856#if EV_FEATURE_API 3575#if EV_FEATURE_API
2857 ++loop_depth; 3576 ++loop_depth;
2858#endif 3577#endif
… …
2971#endif 3690#endif
2972 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3691 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2973 backend_poll (EV_A_ waittime); 3692 backend_poll (EV_A_ waittime);
2974 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3693 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2975 3694
2976 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 3695 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2977 3696
3697 ECB_MEMORY_FENCE_ACQUIRE;
2978 if (pipe_write_skipped) 3698 if (pipe_write_skipped)
2979 { 3699 {
2980 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)));
2981 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3701 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2982 } 3702 }
… …
3015 loop_done = EVBREAK_CANCEL; 3735 loop_done = EVBREAK_CANCEL;
3016 3736
3017#if EV_FEATURE_API 3737#if EV_FEATURE_API
3018 --loop_depth; 3738 --loop_depth;
3019#endif 3739#endif
3020}
3021 3740
3741 return activecnt;
3742}
3743
3022void 3744void
3023ev_break (EV_P_ int how) 3745ev_break (EV_P_ int how) EV_NOEXCEPT
3024{ 3746{
3025 loop_done = how; 3747 loop_done = how;
3026} 3748}
3027 3749
3028void 3750void
3029ev_ref (EV_P) 3751ev_ref (EV_P) EV_NOEXCEPT
3030{ 3752{
3031 ++activecnt; 3753 ++activecnt;
3032} 3754}
3033 3755
3034void 3756void
3035ev_unref (EV_P) 3757ev_unref (EV_P) EV_NOEXCEPT
3036{ 3758{
3037 --activecnt; 3759 --activecnt;
3038} 3760}
3039 3761
3040void 3762void
3041ev_now_update (EV_P) 3763ev_now_update (EV_P) EV_NOEXCEPT
3042{ 3764{
3043 time_update (EV_A_ 1e100); 3765 time_update (EV_A_ 1e100);
3044} 3766}
3045 3767
3046void 3768void
3047ev_suspend (EV_P) 3769ev_suspend (EV_P) EV_NOEXCEPT
3048{ 3770{
3049 ev_now_update (EV_A); 3771 ev_now_update (EV_A);
3050} 3772}
3051 3773
3052void 3774void
3053ev_resume (EV_P) 3775ev_resume (EV_P) EV_NOEXCEPT
3054{ 3776{
3055 ev_tstamp mn_prev = mn_now; 3777 ev_tstamp mn_prev = mn_now;
3056 3778
3057 ev_now_update (EV_A); 3779 ev_now_update (EV_A);
3058 timers_reschedule (EV_A_ mn_now - mn_prev); 3780 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
3097 w->pending = 0; 3819 w->pending = 0;
3098 } 3820 }
3099} 3821}
3100 3822
3101int 3823int
3102ev_clear_pending (EV_P_ void *w) 3824ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
3103{ 3825{
3104 W w_ = (W)w; 3826 W w_ = (W)w;
3105 int pending = w_->pending; 3827 int pending = w_->pending;
3106 3828
3107 if (expect_true (pending)) 3829 if (expect_true (pending))
… …
3139 w->active = 0; 3861 w->active = 0;
3140} 3862}
3141 3863
3142/*****************************************************************************/ 3864/*****************************************************************************/
3143 3865
3144void noinline 3866noinline
3867void
3145ev_io_start (EV_P_ ev_io *w) 3868ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
3146{ 3869{
3147 int fd = w->fd; 3870 int fd = w->fd;
3148 3871
3149 if (expect_false (ev_is_active (w))) 3872 if (expect_false (ev_is_active (w)))
3150 return; 3873 return;
… …
3156 3879
3157 ev_start (EV_A_ (W)w, 1); 3880 ev_start (EV_A_ (W)w, 1);
3158 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3881 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3159 wlist_add (&anfds[fd].head, (WL)w); 3882 wlist_add (&anfds[fd].head, (WL)w);
3160 3883
3884 /* common bug, apparently */
3885 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3886
3161 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);
3162 w->events &= ~EV__IOFDSET; 3888 w->events &= ~EV__IOFDSET;
3163 3889
3164 EV_FREQUENT_CHECK; 3890 EV_FREQUENT_CHECK;
3165} 3891}
3166 3892
3167void noinline 3893noinline
3894void
3168ev_io_stop (EV_P_ ev_io *w) 3895ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
3169{ 3896{
3170 clear_pending (EV_A_ (W)w); 3897 clear_pending (EV_A_ (W)w);
3171 if (expect_false (!ev_is_active (w))) 3898 if (expect_false (!ev_is_active (w)))
3172 return; 3899 return;
3173 3900
… …
3181 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3908 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3182 3909
3183 EV_FREQUENT_CHECK; 3910 EV_FREQUENT_CHECK;
3184} 3911}
3185 3912
3186void noinline 3913noinline
3914void
3187ev_timer_start (EV_P_ ev_timer *w) 3915ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
3188{ 3916{
3189 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
3190 return; 3918 return;
3191 3919
3192 ev_at (w) += mn_now; 3920 ev_at (w) += mn_now;
… …
3205 EV_FREQUENT_CHECK; 3933 EV_FREQUENT_CHECK;
3206 3934
3207 /*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));*/
3208} 3936}
3209 3937
3210void noinline 3938noinline
3939void
3211ev_timer_stop (EV_P_ ev_timer *w) 3940ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
3212{ 3941{
3213 clear_pending (EV_A_ (W)w); 3942 clear_pending (EV_A_ (W)w);
3214 if (expect_false (!ev_is_active (w))) 3943 if (expect_false (!ev_is_active (w)))
3215 return; 3944 return;
3216 3945
… …
3235 ev_stop (EV_A_ (W)w); 3964 ev_stop (EV_A_ (W)w);
3236 3965
3237 EV_FREQUENT_CHECK; 3966 EV_FREQUENT_CHECK;
3238} 3967}
3239 3968
3240void noinline 3969noinline
3970void
3241ev_timer_again (EV_P_ ev_timer *w) 3971ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
3242{ 3972{
3243 EV_FREQUENT_CHECK; 3973 EV_FREQUENT_CHECK;
3974
3975 clear_pending (EV_A_ (W)w);
3244 3976
3245 if (ev_is_active (w)) 3977 if (ev_is_active (w))
3246 { 3978 {
3247 if (w->repeat) 3979 if (w->repeat)
3248 { 3980 {
… …
3261 3993
3262 EV_FREQUENT_CHECK; 3994 EV_FREQUENT_CHECK;
3263} 3995}
3264 3996
3265ev_tstamp 3997ev_tstamp
3266ev_timer_remaining (EV_P_ ev_timer *w) 3998ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
3267{ 3999{
3268 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4000 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3269} 4001}
3270 4002
3271#if EV_PERIODIC_ENABLE 4003#if EV_PERIODIC_ENABLE
3272void noinline 4004noinline
4005void
3273ev_periodic_start (EV_P_ ev_periodic *w) 4006ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
3274{ 4007{
3275 if (expect_false (ev_is_active (w))) 4008 if (expect_false (ev_is_active (w)))
3276 return; 4009 return;
3277 4010
3278 if (w->reschedule_cb) 4011 if (w->reschedule_cb)
… …
3297 EV_FREQUENT_CHECK; 4030 EV_FREQUENT_CHECK;
3298 4031
3299 /*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));*/
3300} 4033}
3301 4034
3302void noinline 4035noinline
4036void
3303ev_periodic_stop (EV_P_ ev_periodic *w) 4037ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
3304{ 4038{
3305 clear_pending (EV_A_ (W)w); 4039 clear_pending (EV_A_ (W)w);
3306 if (expect_false (!ev_is_active (w))) 4040 if (expect_false (!ev_is_active (w)))
3307 return; 4041 return;
3308 4042
… …
3325 ev_stop (EV_A_ (W)w); 4059 ev_stop (EV_A_ (W)w);
3326 4060
3327 EV_FREQUENT_CHECK; 4061 EV_FREQUENT_CHECK;
3328} 4062}
3329 4063
3330void noinline 4064noinline
4065void
3331ev_periodic_again (EV_P_ ev_periodic *w) 4066ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
3332{ 4067{
3333 /* TODO: use adjustheap and recalculation */ 4068 /* TODO: use adjustheap and recalculation */
3334 ev_periodic_stop (EV_A_ w); 4069 ev_periodic_stop (EV_A_ w);
3335 ev_periodic_start (EV_A_ w); 4070 ev_periodic_start (EV_A_ w);
3336} 4071}
… …
3340# define SA_RESTART 0 4075# define SA_RESTART 0
3341#endif 4076#endif
3342 4077
3343#if EV_SIGNAL_ENABLE 4078#if EV_SIGNAL_ENABLE
3344 4079
3345void noinline 4080noinline
4081void
3346ev_signal_start (EV_P_ ev_signal *w) 4082ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
3347{ 4083{
3348 if (expect_false (ev_is_active (w))) 4084 if (expect_false (ev_is_active (w)))
3349 return; 4085 return;
3350 4086
3351 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));
… …
3353#if EV_MULTIPLICITY 4089#if EV_MULTIPLICITY
3354 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",
3355 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4091 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3356 4092
3357 signals [w->signum - 1].loop = EV_A; 4093 signals [w->signum - 1].loop = EV_A;
4094 ECB_MEMORY_FENCE_RELEASE;
3358#endif 4095#endif
3359 4096
3360 EV_FREQUENT_CHECK; 4097 EV_FREQUENT_CHECK;
3361 4098
3362#if EV_USE_SIGNALFD 4099#if EV_USE_SIGNALFD
… …
3421 } 4158 }
3422 4159
3423 EV_FREQUENT_CHECK; 4160 EV_FREQUENT_CHECK;
3424} 4161}
3425 4162
3426void noinline 4163noinline
4164void
3427ev_signal_stop (EV_P_ ev_signal *w) 4165ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
3428{ 4166{
3429 clear_pending (EV_A_ (W)w); 4167 clear_pending (EV_A_ (W)w);
3430 if (expect_false (!ev_is_active (w))) 4168 if (expect_false (!ev_is_active (w)))
3431 return; 4169 return;
3432 4170
… …
3463#endif 4201#endif
3464 4202
3465#if EV_CHILD_ENABLE 4203#if EV_CHILD_ENABLE
3466 4204
3467void 4205void
3468ev_child_start (EV_P_ ev_child *w) 4206ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3469{ 4207{
3470#if EV_MULTIPLICITY 4208#if EV_MULTIPLICITY
3471 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));
3472#endif 4210#endif
3473 if (expect_false (ev_is_active (w))) 4211 if (expect_false (ev_is_active (w)))
… …
3480 4218
3481 EV_FREQUENT_CHECK; 4219 EV_FREQUENT_CHECK;
3482} 4220}
3483 4221
3484void 4222void
3485ev_child_stop (EV_P_ ev_child *w) 4223ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3486{ 4224{
3487 clear_pending (EV_A_ (W)w); 4225 clear_pending (EV_A_ (W)w);
3488 if (expect_false (!ev_is_active (w))) 4226 if (expect_false (!ev_is_active (w)))
3489 return; 4227 return;
3490 4228
… …
3507 4245
3508#define DEF_STAT_INTERVAL 5.0074891 4246#define DEF_STAT_INTERVAL 5.0074891
3509#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4247#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3510#define MIN_STAT_INTERVAL 0.1074891 4248#define MIN_STAT_INTERVAL 0.1074891
3511 4249
3512static 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);
3513 4251
3514#if EV_USE_INOTIFY 4252#if EV_USE_INOTIFY
3515 4253
3516/* 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 */
3517# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4255# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3518 4256
3519static void noinline 4257noinline
4258static void
3520infy_add (EV_P_ ev_stat *w) 4259infy_add (EV_P_ ev_stat *w)
3521{ 4260{
3522 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);
3523 4265
3524 if (w->wd >= 0) 4266 if (w->wd >= 0)
3525 { 4267 {
3526 struct statfs sfs; 4268 struct statfs sfs;
3527 4269
… …
3531 4273
3532 if (!fs_2625) 4274 if (!fs_2625)
3533 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4275 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3534 else if (!statfs (w->path, &sfs) 4276 else if (!statfs (w->path, &sfs)
3535 && (sfs.f_type == 0x1373 /* devfs */ 4277 && (sfs.f_type == 0x1373 /* devfs */
4278 || sfs.f_type == 0x4006 /* fat */
4279 || sfs.f_type == 0x4d44 /* msdos */
3536 || 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 */
3537 || sfs.f_type == 0x3153464a /* jfs */ 4284 || sfs.f_type == 0x3153464a /* jfs */
4285 || sfs.f_type == 0x9123683e /* btrfs */
3538 || sfs.f_type == 0x52654973 /* reiser3 */ 4286 || sfs.f_type == 0x52654973 /* reiser3 */
3539 || sfs.f_type == 0x01021994 /* tempfs */ 4287 || sfs.f_type == 0x01021994 /* tmpfs */
3540 || sfs.f_type == 0x58465342 /* xfs */)) 4288 || sfs.f_type == 0x58465342 /* xfs */))
3541 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4289 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3542 else 4290 else
3543 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 */
3544 } 4292 }
… …
3579 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4327 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3580 ev_timer_again (EV_A_ &w->timer); 4328 ev_timer_again (EV_A_ &w->timer);
3581 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4329 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3582} 4330}
3583 4331
3584static void noinline 4332noinline
4333static void
3585infy_del (EV_P_ ev_stat *w) 4334infy_del (EV_P_ ev_stat *w)
3586{ 4335{
3587 int slot; 4336 int slot;
3588 int wd = w->wd; 4337 int wd = w->wd;
3589 4338
… …
3596 4345
3597 /* remove this watcher, if others are watching it, they will rearm */ 4346 /* remove this watcher, if others are watching it, they will rearm */
3598 inotify_rm_watch (fs_fd, wd); 4347 inotify_rm_watch (fs_fd, wd);
3599} 4348}
3600 4349
3601static void noinline 4350noinline
4351static void
3602infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4352infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3603{ 4353{
3604 if (slot < 0) 4354 if (slot < 0)
3605 /* overflow, need to check for all hash slots */ 4355 /* overflow, need to check for all hash slots */
3606 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4356 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3642 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4392 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3643 ofs += sizeof (struct inotify_event) + ev->len; 4393 ofs += sizeof (struct inotify_event) + ev->len;
3644 } 4394 }
3645} 4395}
3646 4396
3647inline_size void ecb_cold 4397inline_size ecb_cold
4398void
3648ev_check_2625 (EV_P) 4399ev_check_2625 (EV_P)
3649{ 4400{
3650 /* kernels < 2.6.25 are borked 4401 /* kernels < 2.6.25 are borked
3651 * 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
3652 */ 4403 */
… …
3657} 4408}
3658 4409
3659inline_size int 4410inline_size int
3660infy_newfd (void) 4411infy_newfd (void)
3661{ 4412{
3662#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4413#if defined IN_CLOEXEC && defined IN_NONBLOCK
3663 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4414 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3664 if (fd >= 0) 4415 if (fd >= 0)
3665 return fd; 4416 return fd;
3666#endif 4417#endif
3667 return inotify_init (); 4418 return inotify_init ();
… …
3742#else 4493#else
3743# define EV_LSTAT(p,b) lstat (p, b) 4494# define EV_LSTAT(p,b) lstat (p, b)
3744#endif 4495#endif
3745 4496
3746void 4497void
3747ev_stat_stat (EV_P_ ev_stat *w) 4498ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3748{ 4499{
3749 if (lstat (w->path, &w->attr) < 0) 4500 if (lstat (w->path, &w->attr) < 0)
3750 w->attr.st_nlink = 0; 4501 w->attr.st_nlink = 0;
3751 else if (!w->attr.st_nlink) 4502 else if (!w->attr.st_nlink)
3752 w->attr.st_nlink = 1; 4503 w->attr.st_nlink = 1;
3753} 4504}
3754 4505
3755static void noinline 4506noinline
4507static void
3756stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4508stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3757{ 4509{
3758 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4510 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3759 4511
3760 ev_statdata prev = w->attr; 4512 ev_statdata prev = w->attr;
… …
3791 ev_feed_event (EV_A_ w, EV_STAT); 4543 ev_feed_event (EV_A_ w, EV_STAT);
3792 } 4544 }
3793} 4545}
3794 4546
3795void 4547void
3796ev_stat_start (EV_P_ ev_stat *w) 4548ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3797{ 4549{
3798 if (expect_false (ev_is_active (w))) 4550 if (expect_false (ev_is_active (w)))
3799 return; 4551 return;
3800 4552
3801 ev_stat_stat (EV_A_ w); 4553 ev_stat_stat (EV_A_ w);
… …
3822 4574
3823 EV_FREQUENT_CHECK; 4575 EV_FREQUENT_CHECK;
3824} 4576}
3825 4577
3826void 4578void
3827ev_stat_stop (EV_P_ ev_stat *w) 4579ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3828{ 4580{
3829 clear_pending (EV_A_ (W)w); 4581 clear_pending (EV_A_ (W)w);
3830 if (expect_false (!ev_is_active (w))) 4582 if (expect_false (!ev_is_active (w)))
3831 return; 4583 return;
3832 4584
… …
3848} 4600}
3849#endif 4601#endif
3850 4602
3851#if EV_IDLE_ENABLE 4603#if EV_IDLE_ENABLE
3852void 4604void
3853ev_idle_start (EV_P_ ev_idle *w) 4605ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3854{ 4606{
3855 if (expect_false (ev_is_active (w))) 4607 if (expect_false (ev_is_active (w)))
3856 return; 4608 return;
3857 4609
3858 pri_adjust (EV_A_ (W)w); 4610 pri_adjust (EV_A_ (W)w);
… …
3871 4623
3872 EV_FREQUENT_CHECK; 4624 EV_FREQUENT_CHECK;
3873} 4625}
3874 4626
3875void 4627void
3876ev_idle_stop (EV_P_ ev_idle *w) 4628ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3877{ 4629{
3878 clear_pending (EV_A_ (W)w); 4630 clear_pending (EV_A_ (W)w);
3879 if (expect_false (!ev_is_active (w))) 4631 if (expect_false (!ev_is_active (w)))
3880 return; 4632 return;
3881 4633
… …
3895} 4647}
3896#endif 4648#endif
3897 4649
3898#if EV_PREPARE_ENABLE 4650#if EV_PREPARE_ENABLE
3899void 4651void
3900ev_prepare_start (EV_P_ ev_prepare *w) 4652ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3901{ 4653{
3902 if (expect_false (ev_is_active (w))) 4654 if (expect_false (ev_is_active (w)))
3903 return; 4655 return;
3904 4656
3905 EV_FREQUENT_CHECK; 4657 EV_FREQUENT_CHECK;
… …
3910 4662
3911 EV_FREQUENT_CHECK; 4663 EV_FREQUENT_CHECK;
3912} 4664}
3913 4665
3914void 4666void
3915ev_prepare_stop (EV_P_ ev_prepare *w) 4667ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3916{ 4668{
3917 clear_pending (EV_A_ (W)w); 4669 clear_pending (EV_A_ (W)w);
3918 if (expect_false (!ev_is_active (w))) 4670 if (expect_false (!ev_is_active (w)))
3919 return; 4671 return;
3920 4672
… …
3933} 4685}
3934#endif 4686#endif
3935 4687
3936#if EV_CHECK_ENABLE 4688#if EV_CHECK_ENABLE
3937void 4689void
3938ev_check_start (EV_P_ ev_check *w) 4690ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3939{ 4691{
3940 if (expect_false (ev_is_active (w))) 4692 if (expect_false (ev_is_active (w)))
3941 return; 4693 return;
3942 4694
3943 EV_FREQUENT_CHECK; 4695 EV_FREQUENT_CHECK;
… …
3948 4700
3949 EV_FREQUENT_CHECK; 4701 EV_FREQUENT_CHECK;
3950} 4702}
3951 4703
3952void 4704void
3953ev_check_stop (EV_P_ ev_check *w) 4705ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3954{ 4706{
3955 clear_pending (EV_A_ (W)w); 4707 clear_pending (EV_A_ (W)w);
3956 if (expect_false (!ev_is_active (w))) 4708 if (expect_false (!ev_is_active (w)))
3957 return; 4709 return;
3958 4710
… …
3970 EV_FREQUENT_CHECK; 4722 EV_FREQUENT_CHECK;
3971} 4723}
3972#endif 4724#endif
3973 4725
3974#if EV_EMBED_ENABLE 4726#if EV_EMBED_ENABLE
3975void noinline 4727noinline
4728void
3976ev_embed_sweep (EV_P_ ev_embed *w) 4729ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3977{ 4730{
3978 ev_run (w->other, EVRUN_NOWAIT); 4731 ev_run (w->other, EVRUN_NOWAIT);
3979} 4732}
3980 4733
3981static void 4734static void
… …
4029 ev_idle_stop (EV_A_ idle); 4782 ev_idle_stop (EV_A_ idle);
4030} 4783}
4031#endif 4784#endif
4032 4785
4033void 4786void
4034ev_embed_start (EV_P_ ev_embed *w) 4787ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
4035{ 4788{
4036 if (expect_false (ev_is_active (w))) 4789 if (expect_false (ev_is_active (w)))
4037 return; 4790 return;
4038 4791
4039 { 4792 {
… …
4060 4813
4061 EV_FREQUENT_CHECK; 4814 EV_FREQUENT_CHECK;
4062} 4815}
4063 4816
4064void 4817void
4065ev_embed_stop (EV_P_ ev_embed *w) 4818ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
4066{ 4819{
4067 clear_pending (EV_A_ (W)w); 4820 clear_pending (EV_A_ (W)w);
4068 if (expect_false (!ev_is_active (w))) 4821 if (expect_false (!ev_is_active (w)))
4069 return; 4822 return;
4070 4823
… …
4080} 4833}
4081#endif 4834#endif
4082 4835
4083#if EV_FORK_ENABLE 4836#if EV_FORK_ENABLE
4084void 4837void
4085ev_fork_start (EV_P_ ev_fork *w) 4838ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
4086{ 4839{
4087 if (expect_false (ev_is_active (w))) 4840 if (expect_false (ev_is_active (w)))
4088 return; 4841 return;
4089 4842
4090 EV_FREQUENT_CHECK; 4843 EV_FREQUENT_CHECK;
… …
4095 4848
4096 EV_FREQUENT_CHECK; 4849 EV_FREQUENT_CHECK;
4097} 4850}
4098 4851
4099void 4852void
4100ev_fork_stop (EV_P_ ev_fork *w) 4853ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
4101{ 4854{
4102 clear_pending (EV_A_ (W)w); 4855 clear_pending (EV_A_ (W)w);
4103 if (expect_false (!ev_is_active (w))) 4856 if (expect_false (!ev_is_active (w)))
4104 return; 4857 return;
4105 4858
… …
4118} 4871}
4119#endif 4872#endif
4120 4873
4121#if EV_CLEANUP_ENABLE 4874#if EV_CLEANUP_ENABLE
4122void 4875void
4123ev_cleanup_start (EV_P_ ev_cleanup *w) 4876ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4124{ 4877{
4125 if (expect_false (ev_is_active (w))) 4878 if (expect_false (ev_is_active (w)))
4126 return; 4879 return;
4127 4880
4128 EV_FREQUENT_CHECK; 4881 EV_FREQUENT_CHECK;
… …
4135 ev_unref (EV_A); 4888 ev_unref (EV_A);
4136 EV_FREQUENT_CHECK; 4889 EV_FREQUENT_CHECK;
4137} 4890}
4138 4891
4139void 4892void
4140ev_cleanup_stop (EV_P_ ev_cleanup *w) 4893ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4141{ 4894{
4142 clear_pending (EV_A_ (W)w); 4895 clear_pending (EV_A_ (W)w);
4143 if (expect_false (!ev_is_active (w))) 4896 if (expect_false (!ev_is_active (w)))
4144 return; 4897 return;
4145 4898
… …
4159} 4912}
4160#endif 4913#endif
4161 4914
4162#if EV_ASYNC_ENABLE 4915#if EV_ASYNC_ENABLE
4163void 4916void
4164ev_async_start (EV_P_ ev_async *w) 4917ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4165{ 4918{
4166 if (expect_false (ev_is_active (w))) 4919 if (expect_false (ev_is_active (w)))
4167 return; 4920 return;
4168 4921
4169 w->sent = 0; 4922 w->sent = 0;
… …
4178 4931
4179 EV_FREQUENT_CHECK; 4932 EV_FREQUENT_CHECK;
4180} 4933}
4181 4934
4182void 4935void
4183ev_async_stop (EV_P_ ev_async *w) 4936ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4184{ 4937{
4185 clear_pending (EV_A_ (W)w); 4938 clear_pending (EV_A_ (W)w);
4186 if (expect_false (!ev_is_active (w))) 4939 if (expect_false (!ev_is_active (w)))
4187 return; 4940 return;
4188 4941
… …
4199 4952
4200 EV_FREQUENT_CHECK; 4953 EV_FREQUENT_CHECK;
4201} 4954}
4202 4955
4203void 4956void
4204ev_async_send (EV_P_ ev_async *w) 4957ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
4205{ 4958{
4206 w->sent = 1; 4959 w->sent = 1;
4207 evpipe_write (EV_A_ &async_pending); 4960 evpipe_write (EV_A_ &async_pending);
4208} 4961}
4209#endif 4962#endif
… …
4246 4999
4247 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));
4248} 5001}
4249 5002
4250void 5003void
4251ev_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
4252{ 5005{
4253 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));
4254 5007
4255 if (expect_false (!once)) 5008 if (expect_false (!once))
4256 { 5009 {
… …
4277} 5030}
4278 5031
4279/*****************************************************************************/ 5032/*****************************************************************************/
4280 5033
4281#if EV_WALK_ENABLE 5034#if EV_WALK_ENABLE
4282void ecb_cold 5035ecb_cold
5036void
4283ev_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
4284{ 5038{
4285 int i, j; 5039 int i, j;
4286 ev_watcher_list *wl, *wn; 5040 ev_watcher_list *wl, *wn;
4287 5041
4288 if (types & (EV_IO | EV_EMBED)) 5042 if (types & (EV_IO | EV_EMBED))
… …
4394 5148
4395#if EV_MULTIPLICITY 5149#if EV_MULTIPLICITY
4396 #include "ev_wrap.h" 5150 #include "ev_wrap.h"
4397#endif 5151#endif
4398 5152
4399EV_CPP(})
4400

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