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Comparing libev/ev.c (file contents):
Revision 1.440 by root, Tue May 29 21:37:14 2012 UTC vs.
Revision 1.482 by root, Sat Jul 28 04:15:15 2018 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
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
… …
241#elif defined SIGARRAYSIZE 241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig 243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else 245#else
246# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif 247#endif
251 248
252#ifndef EV_USE_FLOOR 249#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0 250# define EV_USE_FLOOR 0
254#endif 251#endif
255 252
256#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else 256# else
260# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
261# endif 267# endif
262#endif 268#endif
263 269
264#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
… …
355# define EV_USE_4HEAP EV_FEATURE_DATA 361# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif 362#endif
357 363
358#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef __ANDROID__
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
360#endif 382#endif
361 383
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */ 385/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL 386#if EV_USE_CLOCK_SYSCALL
… …
372# define EV_USE_CLOCK_SYSCALL 0 394# define EV_USE_CLOCK_SYSCALL 0
373# endif 395# endif
374#endif 396#endif
375 397
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383 399
384#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
385# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
386# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
387#endif 403#endif
… …
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */ 492/* ECB.H BEGIN */
477/* 493/*
478 * libecb - http://software.schmorp.de/pkg/libecb 494 * libecb - http://software.schmorp.de/pkg/libecb
479 * 495 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> 496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta 497 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved. 498 * All rights reserved.
483 * 499 *
484 * Redistribution and use in source and binary forms, with or without modifica- 500 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met: 501 * tion, are permitted provided that the following conditions are met:
… …
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE. 519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
504 */ 531 */
505 532
506#ifndef ECB_H 533#ifndef ECB_H
507#define ECB_H 534#define ECB_H
508 535
509/* 16 bits major, 16 bits minor */ 536/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001 537#define ECB_VERSION 0x00010005
511 538
512#ifdef _WIN32 539#ifdef _WIN32
513 typedef signed char int8_t; 540 typedef signed char int8_t;
514 typedef unsigned char uint8_t; 541 typedef unsigned char uint8_t;
515 typedef signed short int16_t; 542 typedef signed short int16_t;
… …
530 #else 557 #else
531 #define ECB_PTRSIZE 4 558 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t; 559 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t; 560 typedef int32_t intptr_t;
534 #endif 561 #endif
535 typedef intptr_t ptrdiff_t;
536#else 562#else
537 #include <inttypes.h> 563 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU 564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
539 #define ECB_PTRSIZE 8 565 #define ECB_PTRSIZE 8
540 #else 566 #else
541 #define ECB_PTRSIZE 4 567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
542 #endif 580 #endif
543#endif 581#endif
544 582
545/* many compilers define _GNUC_ to some versions but then only implement 583/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions, 584 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers. 585 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so. 586 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have 587 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place. 588 * an issue with that they should have done it right in the first place.
551 */ 589 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ 590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0 591 #define ECB_GCC_VERSION(major,minor) 0
555 #else 592#else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
557 #endif 594#endif
558#endif
559 595
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ 596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
561#define ECB_C99 (__STDC_VERSION__ >= 199901L) 597
562#define ECB_C11 (__STDC_VERSION__ >= 201112L) 598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
563#define ECB_CPP (__cplusplus+0) 610#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP98 (__cplusplus >= 199711L)
565#define ECB_CPP11 (__cplusplus >= 201103L) 611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
566 633
567/*****************************************************************************/ 634/*****************************************************************************/
568 635
569/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
570/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
… …
573 #define ECB_NO_SMP 1 640 #define ECB_NO_SMP 1
574#endif 641#endif
575 642
576#if ECB_NO_SMP 643#if ECB_NO_SMP
577 #define ECB_MEMORY_FENCE do { } while (0) 644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#if 1400 <= _MSC_VER
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
578#endif 654#endif
579 655
580#ifndef ECB_MEMORY_FENCE 656#ifndef ECB_MEMORY_FENCE
581 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
582 #if __i386 || __i386__ 658 #if __i386 || __i386__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
584 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
585 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
586 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 662 #elif ECB_GCC_AMD64
587 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
588 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
589 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
590 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
592 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
593 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
594 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
595 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
596 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
597 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
598 #elif __sparc || __sparc__ 682 #elif __aarch64__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
601 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
602 #elif defined __s390__ || defined __s390x__ 688 #elif defined __s390__ || defined __s390x__
603 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
604 #elif defined __mips__ 690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
606 #elif defined __alpha__ 694 #elif defined __alpha__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
608 #elif defined __hppa__ 696 #elif defined __hppa__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") 697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
610 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
611 #elif defined __ia64__ 699 #elif defined __ia64__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") 700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
705 #elif defined __sh__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
613 #endif 707 #endif
614 #endif 708 #endif
615#endif 709#endif
616 710
617#ifndef ECB_MEMORY_FENCE 711#ifndef ECB_MEMORY_FENCE
618 #if ECB_GCC_VERSION(4,7) 712 #if ECB_GCC_VERSION(4,7)
619 /* see comment below about the C11 memory model. in short - avoid */ 713 /* see comment below (stdatomic.h) about the C11 memory model. */
620 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
621 #elif defined __clang && __has_feature (cxx_atomic) 715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
622 /* see above */ 716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
717
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
623 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
723
624 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
625 #define ECB_MEMORY_FENCE __sync_synchronize () 725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
626 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
627 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
628 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
629 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
630 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
… …
644#ifndef ECB_MEMORY_FENCE 750#ifndef ECB_MEMORY_FENCE
645 #if ECB_C11 && !defined __STDC_NO_ATOMICS__ 751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
646 /* we assume that these memory fences work on all variables/all memory accesses, */ 752 /* we assume that these memory fences work on all variables/all memory accesses, */
647 /* not just C11 atomics and atomic accesses */ 753 /* not just C11 atomics and atomic accesses */
648 #include <stdatomic.h> 754 #include <stdatomic.h>
649 /* unfortunately, the C11 memory model seems to be very limited, and unable to express */ 755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
650 /* simple barrier semantics. That means we need to take out thor's hammer. */ 756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
651 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
652 #endif 764 #endif
653#endif 765#endif
654 766
655#ifndef ECB_MEMORY_FENCE 767#ifndef ECB_MEMORY_FENCE
… …
678 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
679#endif 791#endif
680 792
681/*****************************************************************************/ 793/*****************************************************************************/
682 794
683#if __cplusplus 795#if ECB_CPP
684 #define ecb_inline static inline 796 #define ecb_inline static inline
685#elif ECB_GCC_VERSION(2,5) 797#elif ECB_GCC_VERSION(2,5)
686 #define ecb_inline static __inline__ 798 #define ecb_inline static __inline__
687#elif ECB_C99 799#elif ECB_C99
688 #define ecb_inline static inline 800 #define ecb_inline static inline
… …
702 814
703#define ECB_CONCAT_(a, b) a ## b 815#define ECB_CONCAT_(a, b) a ## b
704#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
705#define ECB_STRINGIFY_(a) # a 817#define ECB_STRINGIFY_(a) # a
706#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 818#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
707 820
708#define ecb_function_ ecb_inline 821#define ecb_function_ ecb_inline
709 822
710#if ECB_GCC_VERSION(3,1) 823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
711 #define ecb_attribute(attrlist) __attribute__(attrlist) 824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
825#else
826 #define ecb_attribute(attrlist)
827#endif
828
829#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
712 #define ecb_is_constant(expr) __builtin_constant_p (expr) 830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
831#else
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
835
836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
713 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
841#else
842 #define ecb_expect(expr,value) (expr)
843#endif
844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
714 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
715#else 847#else
716 #define ecb_attribute(attrlist)
717 #define ecb_is_constant(expr) 0
718 #define ecb_expect(expr,value) (expr)
719 #define ecb_prefetch(addr,rw,locality) 848 #define ecb_prefetch(addr,rw,locality)
720#endif 849#endif
721 850
722/* no emulation for ecb_decltype */ 851/* no emulation for ecb_decltype */
723#if ECB_GCC_VERSION(4,5) 852#if ECB_CPP11
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
724 #define ecb_decltype(x) __decltype(x) 855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
725#elif ECB_GCC_VERSION(3,0) 856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
726 #define ecb_decltype(x) __typeof(x) 857 #define ecb_decltype(x) __typeof__ (x)
727#endif 858#endif
728 859
860#if _MSC_VER >= 1300
861 #define ecb_deprecated __declspec (deprecated)
862#else
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
864#endif
865
866#if _MSC_VER >= 1500
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868#elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
870#else
871 #define ecb_deprecated_message(msg) ecb_deprecated
872#endif
873
874#if _MSC_VER >= 1400
875 #define ecb_noinline __declspec (noinline)
876#else
729#define ecb_noinline ecb_attribute ((__noinline__)) 877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
730#define ecb_unused ecb_attribute ((__unused__)) 880#define ecb_unused ecb_attribute ((__unused__))
731#define ecb_const ecb_attribute ((__const__)) 881#define ecb_const ecb_attribute ((__const__))
732#define ecb_pure ecb_attribute ((__pure__)) 882#define ecb_pure ecb_attribute ((__pure__))
733 883
734#if ECB_C11 884#if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
735 #define ecb_noreturn _Noreturn 886 #define ecb_noreturn _Noreturn
887#elif ECB_CPP11
888 #define ecb_noreturn [[noreturn]]
889#elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
736#else 892#else
737 #define ecb_noreturn ecb_attribute ((__noreturn__)) 893 #define ecb_noreturn ecb_attribute ((__noreturn__))
738#endif 894#endif
739 895
740#if ECB_GCC_VERSION(4,3) 896#if ECB_GCC_VERSION(4,3)
… …
755/* for compatibility to the rest of the world */ 911/* for compatibility to the rest of the world */
756#define ecb_likely(expr) ecb_expect_true (expr) 912#define ecb_likely(expr) ecb_expect_true (expr)
757#define ecb_unlikely(expr) ecb_expect_false (expr) 913#define ecb_unlikely(expr) ecb_expect_false (expr)
758 914
759/* count trailing zero bits and count # of one bits */ 915/* count trailing zero bits and count # of one bits */
760#if ECB_GCC_VERSION(3,4) 916#if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
761 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
762 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
763 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
764 #define ecb_ctz32(x) __builtin_ctz (x) 923 #define ecb_ctz32(x) __builtin_ctz (x)
765 #define ecb_ctz64(x) __builtin_ctzll (x) 924 #define ecb_ctz64(x) __builtin_ctzll (x)
766 #define ecb_popcount32(x) __builtin_popcount (x) 925 #define ecb_popcount32(x) __builtin_popcount (x)
767 /* no popcountll */ 926 /* no popcountll */
768#else 927#else
769 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
770 ecb_function_ int 929 ecb_function_ ecb_const int
771 ecb_ctz32 (uint32_t x) 930 ecb_ctz32 (uint32_t x)
772 { 931 {
932#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
933 unsigned long r;
934 _BitScanForward (&r, x);
935 return (int)r;
936#else
773 int r = 0; 937 int r = 0;
774 938
775 x &= ~x + 1; /* this isolates the lowest bit */ 939 x &= ~x + 1; /* this isolates the lowest bit */
776 940
777#if ECB_branchless_on_i386 941#if ECB_branchless_on_i386
… …
787 if (x & 0xff00ff00) r += 8; 951 if (x & 0xff00ff00) r += 8;
788 if (x & 0xffff0000) r += 16; 952 if (x & 0xffff0000) r += 16;
789#endif 953#endif
790 954
791 return r; 955 return r;
956#endif
792 } 957 }
793 958
794 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
795 ecb_function_ int 960 ecb_function_ ecb_const int
796 ecb_ctz64 (uint64_t x) 961 ecb_ctz64 (uint64_t x)
797 { 962 {
963#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
964 unsigned long r;
965 _BitScanForward64 (&r, x);
966 return (int)r;
967#else
798 int shift = x & 0xffffffffU ? 0 : 32; 968 int shift = x & 0xffffffff ? 0 : 32;
799 return ecb_ctz32 (x >> shift) + shift; 969 return ecb_ctz32 (x >> shift) + shift;
970#endif
800 } 971 }
801 972
802 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
803 ecb_function_ int 974 ecb_function_ ecb_const int
804 ecb_popcount32 (uint32_t x) 975 ecb_popcount32 (uint32_t x)
805 { 976 {
806 x -= (x >> 1) & 0x55555555; 977 x -= (x >> 1) & 0x55555555;
807 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
808 x = ((x >> 4) + x) & 0x0f0f0f0f; 979 x = ((x >> 4) + x) & 0x0f0f0f0f;
809 x *= 0x01010101; 980 x *= 0x01010101;
810 981
811 return x >> 24; 982 return x >> 24;
812 } 983 }
813 984
814 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
815 ecb_function_ int ecb_ld32 (uint32_t x) 986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
816 { 987 {
988#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
989 unsigned long r;
990 _BitScanReverse (&r, x);
991 return (int)r;
992#else
817 int r = 0; 993 int r = 0;
818 994
819 if (x >> 16) { x >>= 16; r += 16; } 995 if (x >> 16) { x >>= 16; r += 16; }
820 if (x >> 8) { x >>= 8; r += 8; } 996 if (x >> 8) { x >>= 8; r += 8; }
821 if (x >> 4) { x >>= 4; r += 4; } 997 if (x >> 4) { x >>= 4; r += 4; }
822 if (x >> 2) { x >>= 2; r += 2; } 998 if (x >> 2) { x >>= 2; r += 2; }
823 if (x >> 1) { r += 1; } 999 if (x >> 1) { r += 1; }
824 1000
825 return r; 1001 return r;
1002#endif
826 } 1003 }
827 1004
828 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
829 ecb_function_ int ecb_ld64 (uint64_t x) 1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
830 { 1007 {
1008#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1009 unsigned long r;
1010 _BitScanReverse64 (&r, x);
1011 return (int)r;
1012#else
831 int r = 0; 1013 int r = 0;
832 1014
833 if (x >> 32) { x >>= 32; r += 32; } 1015 if (x >> 32) { x >>= 32; r += 32; }
834 1016
835 return r + ecb_ld32 (x); 1017 return r + ecb_ld32 (x);
1018#endif
836 } 1019 }
837#endif 1020#endif
838 1021
839ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
840ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 1023ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
841ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
842ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 1025ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
843 1026
844ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
845ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
846{ 1029{
847 return ( (x * 0x0802U & 0x22110U) 1030 return ( (x * 0x0802U & 0x22110U)
848 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
849} 1032}
850 1033
851ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
852ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
853{ 1036{
854 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
855 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
856 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
857 x = ( x >> 8 ) | ( x << 8); 1040 x = ( x >> 8 ) | ( x << 8);
858 1041
859 return x; 1042 return x;
860} 1043}
861 1044
862ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
863ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
864{ 1047{
865 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
866 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
867 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
868 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
871 return x; 1054 return x;
872} 1055}
873 1056
874/* popcount64 is only available on 64 bit cpus as gcc builtin */ 1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
875/* so for this version we are lazy */ 1058/* so for this version we are lazy */
876ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
877ecb_function_ int 1060ecb_function_ ecb_const int
878ecb_popcount64 (uint64_t x) 1061ecb_popcount64 (uint64_t x)
879{ 1062{
880 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
881} 1064}
882 1065
883ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 1066ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
884ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 1067ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
885ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 1068ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
886ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 1069ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
887ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 1070ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
888ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 1071ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
889ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 1072ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
890ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 1073ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
891 1074
892ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 1075ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
893ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 1076ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
894ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 1077ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
895ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 1078ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
896ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 1079ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
897ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 1080ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
898ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 1081ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
899ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 1082ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
900 1083
901#if ECB_GCC_VERSION(4,3) 1084#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1087 #else
902 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
903 #define ecb_bswap32(x) __builtin_bswap32 (x) 1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
904 #define ecb_bswap64(x) __builtin_bswap64 (x) 1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1092#elif _MSC_VER
1093 #include <stdlib.h>
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
905#else 1097#else
906 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
907 ecb_function_ uint16_t 1099 ecb_function_ ecb_const uint16_t
908 ecb_bswap16 (uint16_t x) 1100 ecb_bswap16 (uint16_t x)
909 { 1101 {
910 return ecb_rotl16 (x, 8); 1102 return ecb_rotl16 (x, 8);
911 } 1103 }
912 1104
913 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
914 ecb_function_ uint32_t 1106 ecb_function_ ecb_const uint32_t
915 ecb_bswap32 (uint32_t x) 1107 ecb_bswap32 (uint32_t x)
916 { 1108 {
917 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
918 } 1110 }
919 1111
920 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
921 ecb_function_ uint64_t 1113 ecb_function_ ecb_const uint64_t
922 ecb_bswap64 (uint64_t x) 1114 ecb_bswap64 (uint64_t x)
923 { 1115 {
924 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
925 } 1117 }
926#endif 1118#endif
927 1119
928#if ECB_GCC_VERSION(4,5) 1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
929 #define ecb_unreachable() __builtin_unreachable () 1121 #define ecb_unreachable() __builtin_unreachable ()
930#else 1122#else
931 /* this seems to work fine, but gcc always emits a warning for it :/ */ 1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
932 ecb_inline void ecb_unreachable (void) ecb_noreturn; 1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
933 ecb_inline void ecb_unreachable (void) { } 1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
934#endif 1126#endif
935 1127
936/* try to tell the compiler that some condition is definitely true */ 1128/* try to tell the compiler that some condition is definitely true */
937#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
938 1130
939ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
940ecb_inline unsigned char 1132ecb_inline ecb_const uint32_t
941ecb_byteorder_helper (void) 1133ecb_byteorder_helper (void)
942{ 1134{
943 const uint32_t u = 0x11223344; 1135 /* the union code still generates code under pressure in gcc, */
944 return *(unsigned char *)&u; 1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1144 return 0x44332211;
1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1148 return 0x11223344;
1149#else
1150 union
1151 {
1152 uint8_t c[4];
1153 uint32_t u;
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1155 return u.u;
1156#endif
945} 1157}
946 1158
947ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
948ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 1160ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
949ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
950ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 1162ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
951 1163
952#if ECB_GCC_VERSION(3,0) || ECB_C99 1164#if ECB_GCC_VERSION(3,0) || ECB_C99
953 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
954#else 1166#else
955 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
956#endif 1168#endif
957 1169
958#if __cplusplus 1170#if ECB_CPP
959 template<typename T> 1171 template<typename T>
960 static inline T ecb_div_rd (T val, T div) 1172 static inline T ecb_div_rd (T val, T div)
961 { 1173 {
962 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
963 } 1175 }
… …
980 } 1192 }
981#else 1193#else
982 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
983#endif 1195#endif
984 1196
1197ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198ecb_function_ ecb_const uint32_t
1199ecb_binary16_to_binary32 (uint32_t x)
1200{
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1204
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1209 {
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1212 e = 0 - (127 - 15);
1213 else
1214 {
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1217
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1219 e -= s - 1;
1220 }
1221 }
1222
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1224 e += 127 - 15;
1225
1226 return s | (e << 23) | (m << (23 - 10));
1227}
1228
1229ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230ecb_function_ ecb_const uint16_t
1231ecb_binary32_to_binary16 (uint32_t x)
1232{
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1236
1237 x &= 0x7fffffff;
1238
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1241 {
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1244
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1247 {
1248 m >>= 1;
1249 e += 1;
1250 }
1251
1252 return s | (e << 10) | (m >> (23 - 10));
1253 }
1254
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1257 return s | 0x7c00;
1258
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1261 {
1262 /* zero */
1263 if (ecb_expect_true (!x))
1264 return s;
1265
1266 /* handle subnormals */
1267
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1270 return s;
1271
1272 m |= 0x00800000; /* make implicit bit explicit */
1273
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1275 {
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1279
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1282 }
1283
1284 return s | m;
1285 }
1286
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1288 m >>= 13;
1289
1290 return s | 0x7c00 | m | !m;
1291}
1292
1293/*******************************************************************************/
1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1295
1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1298#if 0 \
1299 || __i386 || __i386__ \
1300 || ECB_GCC_AMD64 \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1309 || defined __sh__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1313 #define ECB_STDFP 1
1314 #include <string.h> /* for memcpy */
1315#else
1316 #define ECB_STDFP 0
1317#endif
1318
1319#ifndef ECB_NO_LIBM
1320
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1322
1323 /* only the oldest of old doesn't have this one. solaris. */
1324 #ifdef INFINITY
1325 #define ECB_INFINITY INFINITY
1326 #else
1327 #define ECB_INFINITY HUGE_VAL
1328 #endif
1329
1330 #ifdef NAN
1331 #define ECB_NAN NAN
1332 #else
1333 #define ECB_NAN ECB_INFINITY
1334 #endif
1335
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1339 #else
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1342 #endif
1343
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1348 {
1349 uint32_t r;
1350
1351 #if ECB_STDFP
1352 memcpy (&r, &x, 4);
1353 #else
1354 /* slow emulation, works for anything but -0 */
1355 uint32_t m;
1356 int e;
1357
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1362
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1364
1365 r = m & 0x80000000U;
1366
1367 if (r)
1368 m = -m;
1369
1370 if (e <= -126)
1371 {
1372 m &= 0xffffffU;
1373 m >>= (-125 - e);
1374 e = -126;
1375 }
1376
1377 r |= (e + 126) << 23;
1378 r |= m & 0x7fffffU;
1379 #endif
1380
1381 return r;
1382 }
1383
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1388 {
1389 float r;
1390
1391 #if ECB_STDFP
1392 memcpy (&r, &x, 4);
1393 #else
1394 /* emulation, only works for normals and subnormals and +0 */
1395 int neg = x >> 31;
1396 int e = (x >> 23) & 0xffU;
1397
1398 x &= 0x7fffffU;
1399
1400 if (e)
1401 x |= 0x800000U;
1402 else
1403 e = 1;
1404
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1407
1408 r = neg ? -r : r;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1418 {
1419 uint64_t r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 8);
1423 #else
1424 /* slow emulation, works for anything but -0 */
1425 uint64_t m;
1426 int e;
1427
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1432
1433 m = frexp (x, &e) * 0x20000000000000U;
1434
1435 r = m & 0x8000000000000000;;
1436
1437 if (r)
1438 m = -m;
1439
1440 if (e <= -1022)
1441 {
1442 m &= 0x1fffffffffffffU;
1443 m >>= (-1021 - e);
1444 e = -1022;
1445 }
1446
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1449 #endif
1450
1451 return r;
1452 }
1453
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1458 {
1459 double r;
1460
1461 #if ECB_STDFP
1462 memcpy (&r, &x, 8);
1463 #else
1464 /* emulation, only works for normals and subnormals and +0 */
1465 int neg = x >> 63;
1466 int e = (x >> 52) & 0x7ffU;
1467
1468 x &= 0xfffffffffffffU;
1469
1470 if (e)
1471 x |= 0x10000000000000U;
1472 else
1473 e = 1;
1474
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1477
1478 r = neg ? -r : r;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1488 {
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1490 }
1491
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1496 {
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1498 }
1499
1500#endif
1501
985#endif 1502#endif
986 1503
987/* ECB.H END */ 1504/* ECB.H END */
988 1505
989#if ECB_MEMORY_FENCE_NEEDS_PTHREADS 1506#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
… …
1010#define inline_size ecb_inline 1527#define inline_size ecb_inline
1011 1528
1012#if EV_FEATURE_CODE 1529#if EV_FEATURE_CODE
1013# define inline_speed ecb_inline 1530# define inline_speed ecb_inline
1014#else 1531#else
1015# define inline_speed static noinline 1532# define inline_speed noinline static
1016#endif 1533#endif
1017 1534
1018#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1019 1536
1020#if EV_MINPRI == EV_MAXPRI 1537#if EV_MINPRI == EV_MAXPRI
… …
1067#else 1584#else
1068 1585
1069#include <float.h> 1586#include <float.h>
1070 1587
1071/* a floor() replacement function, should be independent of ev_tstamp type */ 1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589noinline
1072static ev_tstamp noinline 1590static ev_tstamp
1073ev_floor (ev_tstamp v) 1591ev_floor (ev_tstamp v)
1074{ 1592{
1075 /* the choice of shift factor is not terribly important */ 1593 /* the choice of shift factor is not terribly important */
1076#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1594#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1077 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1595 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
… …
1109 1627
1110#ifdef __linux 1628#ifdef __linux
1111# include <sys/utsname.h> 1629# include <sys/utsname.h>
1112#endif 1630#endif
1113 1631
1114static unsigned int noinline ecb_cold 1632noinline ecb_cold
1633static unsigned int
1115ev_linux_version (void) 1634ev_linux_version (void)
1116{ 1635{
1117#ifdef __linux 1636#ifdef __linux
1118 unsigned int v = 0; 1637 unsigned int v = 0;
1119 struct utsname buf; 1638 struct utsname buf;
… …
1148} 1667}
1149 1668
1150/*****************************************************************************/ 1669/*****************************************************************************/
1151 1670
1152#if EV_AVOID_STDIO 1671#if EV_AVOID_STDIO
1153static void noinline ecb_cold 1672noinline ecb_cold
1673static void
1154ev_printerr (const char *msg) 1674ev_printerr (const char *msg)
1155{ 1675{
1156 write (STDERR_FILENO, msg, strlen (msg)); 1676 write (STDERR_FILENO, msg, strlen (msg));
1157} 1677}
1158#endif 1678#endif
1159 1679
1160static void (*syserr_cb)(const char *msg) EV_THROW; 1680static void (*syserr_cb)(const char *msg) EV_THROW;
1161 1681
1162void ecb_cold 1682ecb_cold
1683void
1163ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW 1684ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1164{ 1685{
1165 syserr_cb = cb; 1686 syserr_cb = cb;
1166} 1687}
1167 1688
1168static void noinline ecb_cold 1689noinline ecb_cold
1690static void
1169ev_syserr (const char *msg) 1691ev_syserr (const char *msg)
1170{ 1692{
1171 if (!msg) 1693 if (!msg)
1172 msg = "(libev) system error"; 1694 msg = "(libev) system error";
1173 1695
… …
1188} 1710}
1189 1711
1190static void * 1712static void *
1191ev_realloc_emul (void *ptr, long size) EV_THROW 1713ev_realloc_emul (void *ptr, long size) EV_THROW
1192{ 1714{
1193#if __GLIBC__
1194 return realloc (ptr, size);
1195#else
1196 /* some systems, notably openbsd and darwin, fail to properly 1715 /* some systems, notably openbsd and darwin, fail to properly
1197 * implement realloc (x, 0) (as required by both ansi c-89 and 1716 * implement realloc (x, 0) (as required by both ansi c-89 and
1198 * the single unix specification, so work around them here. 1717 * the single unix specification, so work around them here.
1718 * recently, also (at least) fedora and debian started breaking it,
1719 * despite documenting it otherwise.
1199 */ 1720 */
1200 1721
1201 if (size) 1722 if (size)
1202 return realloc (ptr, size); 1723 return realloc (ptr, size);
1203 1724
1204 free (ptr); 1725 free (ptr);
1205 return 0; 1726 return 0;
1206#endif
1207} 1727}
1208 1728
1209static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; 1729static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1210 1730
1211void ecb_cold 1731ecb_cold
1732void
1212ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW 1733ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1213{ 1734{
1214 alloc = cb; 1735 alloc = cb;
1215} 1736}
1216 1737
… …
1385 struct timespec ts; 1906 struct timespec ts;
1386 1907
1387 EV_TS_SET (ts, delay); 1908 EV_TS_SET (ts, delay);
1388 nanosleep (&ts, 0); 1909 nanosleep (&ts, 0);
1389#elif defined _WIN32 1910#elif defined _WIN32
1911 /* maybe this should round up, as ms is very low resolution */
1912 /* compared to select (µs) or nanosleep (ns) */
1390 Sleep ((unsigned long)(delay * 1e3)); 1913 Sleep ((unsigned long)(delay * 1e3));
1391#else 1914#else
1392 struct timeval tv; 1915 struct timeval tv;
1393 1916
1394 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1917 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
1425 } 1948 }
1426 1949
1427 return ncur; 1950 return ncur;
1428} 1951}
1429 1952
1430static void * noinline ecb_cold 1953noinline ecb_cold
1954static void *
1431array_realloc (int elem, void *base, int *cur, int cnt) 1955array_realloc (int elem, void *base, int *cur, int cnt)
1432{ 1956{
1433 *cur = array_nextsize (elem, *cur, cnt); 1957 *cur = array_nextsize (elem, *cur, cnt);
1434 return ev_realloc (base, elem * *cur); 1958 return ev_realloc (base, elem * *cur);
1435} 1959}
… …
1438 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1962 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1439 1963
1440#define array_needsize(type,base,cur,cnt,init) \ 1964#define array_needsize(type,base,cur,cnt,init) \
1441 if (expect_false ((cnt) > (cur))) \ 1965 if (expect_false ((cnt) > (cur))) \
1442 { \ 1966 { \
1443 int ecb_unused ocur_ = (cur); \ 1967 ecb_unused int ocur_ = (cur); \
1444 (base) = (type *)array_realloc \ 1968 (base) = (type *)array_realloc \
1445 (sizeof (type), (base), &(cur), (cnt)); \ 1969 (sizeof (type), (base), &(cur), (cnt)); \
1446 init ((base) + (ocur_), (cur) - ocur_); \ 1970 init ((base) + (ocur_), (cur) - ocur_); \
1447 } 1971 }
1448 1972
… …
1460 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1984 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1461 1985
1462/*****************************************************************************/ 1986/*****************************************************************************/
1463 1987
1464/* dummy callback for pending events */ 1988/* dummy callback for pending events */
1465static void noinline 1989noinline
1990static void
1466pendingcb (EV_P_ ev_prepare *w, int revents) 1991pendingcb (EV_P_ ev_prepare *w, int revents)
1467{ 1992{
1468} 1993}
1469 1994
1470void noinline 1995noinline
1996void
1471ev_feed_event (EV_P_ void *w, int revents) EV_THROW 1997ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1472{ 1998{
1473 W w_ = (W)w; 1999 W w_ = (W)w;
1474 int pri = ABSPRI (w_); 2000 int pri = ABSPRI (w_);
1475 2001
… …
1605 2131
1606 fdchangecnt = 0; 2132 fdchangecnt = 0;
1607} 2133}
1608 2134
1609/* something about the given fd changed */ 2135/* something about the given fd changed */
1610inline_size void 2136inline_size
2137void
1611fd_change (EV_P_ int fd, int flags) 2138fd_change (EV_P_ int fd, int flags)
1612{ 2139{
1613 unsigned char reify = anfds [fd].reify; 2140 unsigned char reify = anfds [fd].reify;
1614 anfds [fd].reify |= flags; 2141 anfds [fd].reify |= flags;
1615 2142
… …
1620 fdchanges [fdchangecnt - 1] = fd; 2147 fdchanges [fdchangecnt - 1] = fd;
1621 } 2148 }
1622} 2149}
1623 2150
1624/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2151/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1625inline_speed void ecb_cold 2152inline_speed ecb_cold void
1626fd_kill (EV_P_ int fd) 2153fd_kill (EV_P_ int fd)
1627{ 2154{
1628 ev_io *w; 2155 ev_io *w;
1629 2156
1630 while ((w = (ev_io *)anfds [fd].head)) 2157 while ((w = (ev_io *)anfds [fd].head))
… …
1633 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2160 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1634 } 2161 }
1635} 2162}
1636 2163
1637/* check whether the given fd is actually valid, for error recovery */ 2164/* check whether the given fd is actually valid, for error recovery */
1638inline_size int ecb_cold 2165inline_size ecb_cold int
1639fd_valid (int fd) 2166fd_valid (int fd)
1640{ 2167{
1641#ifdef _WIN32 2168#ifdef _WIN32
1642 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2169 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1643#else 2170#else
1644 return fcntl (fd, F_GETFD) != -1; 2171 return fcntl (fd, F_GETFD) != -1;
1645#endif 2172#endif
1646} 2173}
1647 2174
1648/* called on EBADF to verify fds */ 2175/* called on EBADF to verify fds */
1649static void noinline ecb_cold 2176noinline ecb_cold
2177static void
1650fd_ebadf (EV_P) 2178fd_ebadf (EV_P)
1651{ 2179{
1652 int fd; 2180 int fd;
1653 2181
1654 for (fd = 0; fd < anfdmax; ++fd) 2182 for (fd = 0; fd < anfdmax; ++fd)
… …
1656 if (!fd_valid (fd) && errno == EBADF) 2184 if (!fd_valid (fd) && errno == EBADF)
1657 fd_kill (EV_A_ fd); 2185 fd_kill (EV_A_ fd);
1658} 2186}
1659 2187
1660/* called on ENOMEM in select/poll to kill some fds and retry */ 2188/* called on ENOMEM in select/poll to kill some fds and retry */
1661static void noinline ecb_cold 2189noinline ecb_cold
2190static void
1662fd_enomem (EV_P) 2191fd_enomem (EV_P)
1663{ 2192{
1664 int fd; 2193 int fd;
1665 2194
1666 for (fd = anfdmax; fd--; ) 2195 for (fd = anfdmax; fd--; )
… …
1670 break; 2199 break;
1671 } 2200 }
1672} 2201}
1673 2202
1674/* usually called after fork if backend needs to re-arm all fds from scratch */ 2203/* usually called after fork if backend needs to re-arm all fds from scratch */
1675static void noinline 2204noinline
2205static void
1676fd_rearm_all (EV_P) 2206fd_rearm_all (EV_P)
1677{ 2207{
1678 int fd; 2208 int fd;
1679 2209
1680 for (fd = 0; fd < anfdmax; ++fd) 2210 for (fd = 0; fd < anfdmax; ++fd)
… …
1861 2391
1862/*****************************************************************************/ 2392/*****************************************************************************/
1863 2393
1864#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2394#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1865 2395
1866static void noinline ecb_cold 2396noinline ecb_cold
2397static void
1867evpipe_init (EV_P) 2398evpipe_init (EV_P)
1868{ 2399{
1869 if (!ev_is_active (&pipe_w)) 2400 if (!ev_is_active (&pipe_w))
1870 { 2401 {
2402 int fds [2];
2403
1871# if EV_USE_EVENTFD 2404# if EV_USE_EVENTFD
2405 fds [0] = -1;
1872 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2406 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1873 if (evfd < 0 && errno == EINVAL) 2407 if (fds [1] < 0 && errno == EINVAL)
1874 evfd = eventfd (0, 0); 2408 fds [1] = eventfd (0, 0);
1875 2409
1876 if (evfd >= 0) 2410 if (fds [1] < 0)
1877 {
1878 evpipe [0] = -1;
1879 fd_intern (evfd); /* doing it twice doesn't hurt */
1880 ev_io_set (&pipe_w, evfd, EV_READ);
1881 }
1882 else
1883# endif 2411# endif
1884 { 2412 {
1885 while (pipe (evpipe)) 2413 while (pipe (fds))
1886 ev_syserr ("(libev) error creating signal/async pipe"); 2414 ev_syserr ("(libev) error creating signal/async pipe");
1887 2415
1888 fd_intern (evpipe [0]); 2416 fd_intern (fds [0]);
1889 fd_intern (evpipe [1]);
1890 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1891 } 2417 }
1892 2418
2419 evpipe [0] = fds [0];
2420
2421 if (evpipe [1] < 0)
2422 evpipe [1] = fds [1]; /* first call, set write fd */
2423 else
2424 {
2425 /* on subsequent calls, do not change evpipe [1] */
2426 /* so that evpipe_write can always rely on its value. */
2427 /* this branch does not do anything sensible on windows, */
2428 /* so must not be executed on windows */
2429
2430 dup2 (fds [1], evpipe [1]);
2431 close (fds [1]);
2432 }
2433
2434 fd_intern (evpipe [1]);
2435
2436 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
1893 ev_io_start (EV_A_ &pipe_w); 2437 ev_io_start (EV_A_ &pipe_w);
1894 ev_unref (EV_A); /* watcher should not keep loop alive */ 2438 ev_unref (EV_A); /* watcher should not keep loop alive */
1895 } 2439 }
1896} 2440}
1897 2441
… …
1918 ECB_MEMORY_FENCE_RELEASE; 2462 ECB_MEMORY_FENCE_RELEASE;
1919 2463
1920 old_errno = errno; /* save errno because write will clobber it */ 2464 old_errno = errno; /* save errno because write will clobber it */
1921 2465
1922#if EV_USE_EVENTFD 2466#if EV_USE_EVENTFD
1923 if (evfd >= 0) 2467 if (evpipe [0] < 0)
1924 { 2468 {
1925 uint64_t counter = 1; 2469 uint64_t counter = 1;
1926 write (evfd, &counter, sizeof (uint64_t)); 2470 write (evpipe [1], &counter, sizeof (uint64_t));
1927 } 2471 }
1928 else 2472 else
1929#endif 2473#endif
1930 { 2474 {
1931#ifdef _WIN32 2475#ifdef _WIN32
… …
1951 int i; 2495 int i;
1952 2496
1953 if (revents & EV_READ) 2497 if (revents & EV_READ)
1954 { 2498 {
1955#if EV_USE_EVENTFD 2499#if EV_USE_EVENTFD
1956 if (evfd >= 0) 2500 if (evpipe [0] < 0)
1957 { 2501 {
1958 uint64_t counter; 2502 uint64_t counter;
1959 read (evfd, &counter, sizeof (uint64_t)); 2503 read (evpipe [1], &counter, sizeof (uint64_t));
1960 } 2504 }
1961 else 2505 else
1962#endif 2506#endif
1963 { 2507 {
1964 char dummy[4]; 2508 char dummy[4];
… …
2014 2558
2015void 2559void
2016ev_feed_signal (int signum) EV_THROW 2560ev_feed_signal (int signum) EV_THROW
2017{ 2561{
2018#if EV_MULTIPLICITY 2562#if EV_MULTIPLICITY
2563 EV_P;
2564 ECB_MEMORY_FENCE_ACQUIRE;
2019 EV_P = signals [signum - 1].loop; 2565 EV_A = signals [signum - 1].loop;
2020 2566
2021 if (!EV_A) 2567 if (!EV_A)
2022 return; 2568 return;
2023#endif 2569#endif
2024 2570
2025 if (!ev_active (&pipe_w))
2026 return;
2027
2028 signals [signum - 1].pending = 1; 2571 signals [signum - 1].pending = 1;
2029 evpipe_write (EV_A_ &sig_pending); 2572 evpipe_write (EV_A_ &sig_pending);
2030} 2573}
2031 2574
2032static void 2575static void
… …
2037#endif 2580#endif
2038 2581
2039 ev_feed_signal (signum); 2582 ev_feed_signal (signum);
2040} 2583}
2041 2584
2042void noinline 2585noinline
2586void
2043ev_feed_signal_event (EV_P_ int signum) EV_THROW 2587ev_feed_signal_event (EV_P_ int signum) EV_THROW
2044{ 2588{
2045 WL w; 2589 WL w;
2046 2590
2047 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2591 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2048 return; 2592 return;
2049 2593
2050 --signum; 2594 --signum;
2051 2595
2052#if EV_MULTIPLICITY 2596#if EV_MULTIPLICITY
… …
2164#endif 2708#endif
2165#if EV_USE_SELECT 2709#if EV_USE_SELECT
2166# include "ev_select.c" 2710# include "ev_select.c"
2167#endif 2711#endif
2168 2712
2169int ecb_cold 2713ecb_cold int
2170ev_version_major (void) EV_THROW 2714ev_version_major (void) EV_THROW
2171{ 2715{
2172 return EV_VERSION_MAJOR; 2716 return EV_VERSION_MAJOR;
2173} 2717}
2174 2718
2175int ecb_cold 2719ecb_cold int
2176ev_version_minor (void) EV_THROW 2720ev_version_minor (void) EV_THROW
2177{ 2721{
2178 return EV_VERSION_MINOR; 2722 return EV_VERSION_MINOR;
2179} 2723}
2180 2724
2181/* return true if we are running with elevated privileges and should ignore env variables */ 2725/* return true if we are running with elevated privileges and should ignore env variables */
2182int inline_size ecb_cold 2726inline_size ecb_cold int
2183enable_secure (void) 2727enable_secure (void)
2184{ 2728{
2185#ifdef _WIN32 2729#ifdef _WIN32
2186 return 0; 2730 return 0;
2187#else 2731#else
2188 return getuid () != geteuid () 2732 return getuid () != geteuid ()
2189 || getgid () != getegid (); 2733 || getgid () != getegid ();
2190#endif 2734#endif
2191} 2735}
2192 2736
2193unsigned int ecb_cold 2737ecb_cold
2738unsigned int
2194ev_supported_backends (void) EV_THROW 2739ev_supported_backends (void) EV_THROW
2195{ 2740{
2196 unsigned int flags = 0; 2741 unsigned int flags = 0;
2197 2742
2198 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2743 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
2202 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2747 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2203 2748
2204 return flags; 2749 return flags;
2205} 2750}
2206 2751
2207unsigned int ecb_cold 2752ecb_cold
2753unsigned int
2208ev_recommended_backends (void) EV_THROW 2754ev_recommended_backends (void) EV_THROW
2209{ 2755{
2210 unsigned int flags = ev_supported_backends (); 2756 unsigned int flags = ev_supported_backends ();
2211 2757
2212#ifndef __NetBSD__ 2758#ifndef __NetBSD__
… …
2224#endif 2770#endif
2225 2771
2226 return flags; 2772 return flags;
2227} 2773}
2228 2774
2229unsigned int ecb_cold 2775ecb_cold
2776unsigned int
2230ev_embeddable_backends (void) EV_THROW 2777ev_embeddable_backends (void) EV_THROW
2231{ 2778{
2232 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2779 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2233 2780
2234 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2781 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
… …
2280{ 2827{
2281 return userdata; 2828 return userdata;
2282} 2829}
2283 2830
2284void 2831void
2285ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW 2832ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2286{ 2833{
2287 invoke_cb = invoke_pending_cb; 2834 invoke_cb = invoke_pending_cb;
2288} 2835}
2289 2836
2290void 2837void
… …
2294 acquire_cb = acquire; 2841 acquire_cb = acquire;
2295} 2842}
2296#endif 2843#endif
2297 2844
2298/* initialise a loop structure, must be zero-initialised */ 2845/* initialise a loop structure, must be zero-initialised */
2299static void noinline ecb_cold 2846noinline ecb_cold
2847static void
2300loop_init (EV_P_ unsigned int flags) EV_THROW 2848loop_init (EV_P_ unsigned int flags) EV_THROW
2301{ 2849{
2302 if (!backend) 2850 if (!backend)
2303 { 2851 {
2304 origflags = flags; 2852 origflags = flags;
… …
2350#if EV_ASYNC_ENABLE 2898#if EV_ASYNC_ENABLE
2351 async_pending = 0; 2899 async_pending = 0;
2352#endif 2900#endif
2353 pipe_write_skipped = 0; 2901 pipe_write_skipped = 0;
2354 pipe_write_wanted = 0; 2902 pipe_write_wanted = 0;
2903 evpipe [0] = -1;
2904 evpipe [1] = -1;
2355#if EV_USE_INOTIFY 2905#if EV_USE_INOTIFY
2356 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2906 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2357#endif 2907#endif
2358#if EV_USE_SIGNALFD 2908#if EV_USE_SIGNALFD
2359 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2909 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
2389#endif 2939#endif
2390 } 2940 }
2391} 2941}
2392 2942
2393/* free up a loop structure */ 2943/* free up a loop structure */
2394void ecb_cold 2944ecb_cold
2945void
2395ev_loop_destroy (EV_P) 2946ev_loop_destroy (EV_P)
2396{ 2947{
2397 int i; 2948 int i;
2398 2949
2399#if EV_MULTIPLICITY 2950#if EV_MULTIPLICITY
… …
2422 if (ev_is_active (&pipe_w)) 2973 if (ev_is_active (&pipe_w))
2423 { 2974 {
2424 /*ev_ref (EV_A);*/ 2975 /*ev_ref (EV_A);*/
2425 /*ev_io_stop (EV_A_ &pipe_w);*/ 2976 /*ev_io_stop (EV_A_ &pipe_w);*/
2426 2977
2427#if EV_USE_EVENTFD
2428 if (evfd >= 0)
2429 close (evfd);
2430#endif
2431
2432 if (evpipe [0] >= 0)
2433 {
2434 EV_WIN32_CLOSE_FD (evpipe [0]); 2978 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2435 EV_WIN32_CLOSE_FD (evpipe [1]); 2979 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2436 }
2437 } 2980 }
2438 2981
2439#if EV_USE_SIGNALFD 2982#if EV_USE_SIGNALFD
2440 if (ev_is_active (&sigfd_w)) 2983 if (ev_is_active (&sigfd_w))
2441 close (sigfd); 2984 close (sigfd);
… …
2527#endif 3070#endif
2528#if EV_USE_INOTIFY 3071#if EV_USE_INOTIFY
2529 infy_fork (EV_A); 3072 infy_fork (EV_A);
2530#endif 3073#endif
2531 3074
3075#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2532 if (ev_is_active (&pipe_w)) 3076 if (ev_is_active (&pipe_w) && postfork != 2)
2533 { 3077 {
2534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3078 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2535 3079
2536 ev_ref (EV_A); 3080 ev_ref (EV_A);
2537 ev_io_stop (EV_A_ &pipe_w); 3081 ev_io_stop (EV_A_ &pipe_w);
2538 3082
2539#if EV_USE_EVENTFD
2540 if (evfd >= 0)
2541 close (evfd);
2542#endif
2543
2544 if (evpipe [0] >= 0) 3083 if (evpipe [0] >= 0)
2545 {
2546 EV_WIN32_CLOSE_FD (evpipe [0]); 3084 EV_WIN32_CLOSE_FD (evpipe [0]);
2547 EV_WIN32_CLOSE_FD (evpipe [1]);
2548 }
2549 3085
2550#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2551 evpipe_init (EV_A); 3086 evpipe_init (EV_A);
2552 /* now iterate over everything, in case we missed something */ 3087 /* iterate over everything, in case we missed something before */
2553 pipecb (EV_A_ &pipe_w, EV_READ); 3088 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2554#endif
2555 } 3089 }
3090#endif
2556 3091
2557 postfork = 0; 3092 postfork = 0;
2558} 3093}
2559 3094
2560#if EV_MULTIPLICITY 3095#if EV_MULTIPLICITY
2561 3096
3097ecb_cold
2562struct ev_loop * ecb_cold 3098struct ev_loop *
2563ev_loop_new (unsigned int flags) EV_THROW 3099ev_loop_new (unsigned int flags) EV_THROW
2564{ 3100{
2565 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3101 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2566 3102
2567 memset (EV_A, 0, sizeof (struct ev_loop)); 3103 memset (EV_A, 0, sizeof (struct ev_loop));
… …
2575} 3111}
2576 3112
2577#endif /* multiplicity */ 3113#endif /* multiplicity */
2578 3114
2579#if EV_VERIFY 3115#if EV_VERIFY
2580static void noinline ecb_cold 3116noinline ecb_cold
3117static void
2581verify_watcher (EV_P_ W w) 3118verify_watcher (EV_P_ W w)
2582{ 3119{
2583 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3120 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2584 3121
2585 if (w->pending) 3122 if (w->pending)
2586 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3123 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2587} 3124}
2588 3125
2589static void noinline ecb_cold 3126noinline ecb_cold
3127static void
2590verify_heap (EV_P_ ANHE *heap, int N) 3128verify_heap (EV_P_ ANHE *heap, int N)
2591{ 3129{
2592 int i; 3130 int i;
2593 3131
2594 for (i = HEAP0; i < N + HEAP0; ++i) 3132 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2599 3137
2600 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3138 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2601 } 3139 }
2602} 3140}
2603 3141
2604static void noinline ecb_cold 3142noinline ecb_cold
3143static void
2605array_verify (EV_P_ W *ws, int cnt) 3144array_verify (EV_P_ W *ws, int cnt)
2606{ 3145{
2607 while (cnt--) 3146 while (cnt--)
2608 { 3147 {
2609 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3148 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2698#endif 3237#endif
2699} 3238}
2700#endif 3239#endif
2701 3240
2702#if EV_MULTIPLICITY 3241#if EV_MULTIPLICITY
3242ecb_cold
2703struct ev_loop * ecb_cold 3243struct ev_loop *
2704#else 3244#else
2705int 3245int
2706#endif 3246#endif
2707ev_default_loop (unsigned int flags) EV_THROW 3247ev_default_loop (unsigned int flags) EV_THROW
2708{ 3248{
… …
2756 count += pendingcnt [pri]; 3296 count += pendingcnt [pri];
2757 3297
2758 return count; 3298 return count;
2759} 3299}
2760 3300
2761void noinline 3301noinline
3302void
2762ev_invoke_pending (EV_P) 3303ev_invoke_pending (EV_P)
2763{ 3304{
2764 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */ 3305 pendingpri = NUMPRI;
3306
3307 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3308 {
3309 --pendingpri;
3310
2765 while (pendingcnt [pendingpri]) 3311 while (pendingcnt [pendingpri])
2766 { 3312 {
2767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; 3313 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2768 3314
2769 p->w->pending = 0; 3315 p->w->pending = 0;
2770 EV_CB_INVOKE (p->w, p->events); 3316 EV_CB_INVOKE (p->w, p->events);
2771 EV_FREQUENT_CHECK; 3317 EV_FREQUENT_CHECK;
2772 } 3318 }
3319 }
2773} 3320}
2774 3321
2775#if EV_IDLE_ENABLE 3322#if EV_IDLE_ENABLE
2776/* make idle watchers pending. this handles the "call-idle */ 3323/* make idle watchers pending. this handles the "call-idle */
2777/* only when higher priorities are idle" logic */ 3324/* only when higher priorities are idle" logic */
… …
2835 } 3382 }
2836} 3383}
2837 3384
2838#if EV_PERIODIC_ENABLE 3385#if EV_PERIODIC_ENABLE
2839 3386
2840static void noinline 3387noinline
3388static void
2841periodic_recalc (EV_P_ ev_periodic *w) 3389periodic_recalc (EV_P_ ev_periodic *w)
2842{ 3390{
2843 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3391 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2844 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); 3392 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2845 3393
… …
2903 } 3451 }
2904} 3452}
2905 3453
2906/* simply recalculate all periodics */ 3454/* simply recalculate all periodics */
2907/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3455/* TODO: maybe ensure that at least one event happens when jumping forward? */
2908static void noinline ecb_cold 3456noinline ecb_cold
3457static void
2909periodics_reschedule (EV_P) 3458periodics_reschedule (EV_P)
2910{ 3459{
2911 int i; 3460 int i;
2912 3461
2913 /* adjust periodics after time jump */ 3462 /* adjust periodics after time jump */
… …
2926 reheap (periodics, periodiccnt); 3475 reheap (periodics, periodiccnt);
2927} 3476}
2928#endif 3477#endif
2929 3478
2930/* adjust all timers by a given offset */ 3479/* adjust all timers by a given offset */
2931static void noinline ecb_cold 3480noinline ecb_cold
3481static void
2932timers_reschedule (EV_P_ ev_tstamp adjust) 3482timers_reschedule (EV_P_ ev_tstamp adjust)
2933{ 3483{
2934 int i; 3484 int i;
2935 3485
2936 for (i = 0; i < timercnt; ++i) 3486 for (i = 0; i < timercnt; ++i)
… …
3135 backend_poll (EV_A_ waittime); 3685 backend_poll (EV_A_ waittime);
3136 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3686 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3137 3687
3138 pipe_write_wanted = 0; /* just an optimisation, no fence needed */ 3688 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3139 3689
3690 ECB_MEMORY_FENCE_ACQUIRE;
3140 if (pipe_write_skipped) 3691 if (pipe_write_skipped)
3141 { 3692 {
3142 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3693 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3694 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3144 } 3695 }
… …
3303 w->active = 0; 3854 w->active = 0;
3304} 3855}
3305 3856
3306/*****************************************************************************/ 3857/*****************************************************************************/
3307 3858
3308void noinline 3859noinline
3860void
3309ev_io_start (EV_P_ ev_io *w) EV_THROW 3861ev_io_start (EV_P_ ev_io *w) EV_THROW
3310{ 3862{
3311 int fd = w->fd; 3863 int fd = w->fd;
3312 3864
3313 if (expect_false (ev_is_active (w))) 3865 if (expect_false (ev_is_active (w)))
… …
3329 w->events &= ~EV__IOFDSET; 3881 w->events &= ~EV__IOFDSET;
3330 3882
3331 EV_FREQUENT_CHECK; 3883 EV_FREQUENT_CHECK;
3332} 3884}
3333 3885
3334void noinline 3886noinline
3887void
3335ev_io_stop (EV_P_ ev_io *w) EV_THROW 3888ev_io_stop (EV_P_ ev_io *w) EV_THROW
3336{ 3889{
3337 clear_pending (EV_A_ (W)w); 3890 clear_pending (EV_A_ (W)w);
3338 if (expect_false (!ev_is_active (w))) 3891 if (expect_false (!ev_is_active (w)))
3339 return; 3892 return;
… …
3348 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3901 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3349 3902
3350 EV_FREQUENT_CHECK; 3903 EV_FREQUENT_CHECK;
3351} 3904}
3352 3905
3353void noinline 3906noinline
3907void
3354ev_timer_start (EV_P_ ev_timer *w) EV_THROW 3908ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3355{ 3909{
3356 if (expect_false (ev_is_active (w))) 3910 if (expect_false (ev_is_active (w)))
3357 return; 3911 return;
3358 3912
… …
3372 EV_FREQUENT_CHECK; 3926 EV_FREQUENT_CHECK;
3373 3927
3374 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3928 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3375} 3929}
3376 3930
3377void noinline 3931noinline
3932void
3378ev_timer_stop (EV_P_ ev_timer *w) EV_THROW 3933ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3379{ 3934{
3380 clear_pending (EV_A_ (W)w); 3935 clear_pending (EV_A_ (W)w);
3381 if (expect_false (!ev_is_active (w))) 3936 if (expect_false (!ev_is_active (w)))
3382 return; 3937 return;
… …
3402 ev_stop (EV_A_ (W)w); 3957 ev_stop (EV_A_ (W)w);
3403 3958
3404 EV_FREQUENT_CHECK; 3959 EV_FREQUENT_CHECK;
3405} 3960}
3406 3961
3407void noinline 3962noinline
3963void
3408ev_timer_again (EV_P_ ev_timer *w) EV_THROW 3964ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3409{ 3965{
3410 EV_FREQUENT_CHECK; 3966 EV_FREQUENT_CHECK;
3411 3967
3412 clear_pending (EV_A_ (W)w); 3968 clear_pending (EV_A_ (W)w);
… …
3436{ 3992{
3437 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3993 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3438} 3994}
3439 3995
3440#if EV_PERIODIC_ENABLE 3996#if EV_PERIODIC_ENABLE
3441void noinline 3997noinline
3998void
3442ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW 3999ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3443{ 4000{
3444 if (expect_false (ev_is_active (w))) 4001 if (expect_false (ev_is_active (w)))
3445 return; 4002 return;
3446 4003
… …
3466 EV_FREQUENT_CHECK; 4023 EV_FREQUENT_CHECK;
3467 4024
3468 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4025 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3469} 4026}
3470 4027
3471void noinline 4028noinline
4029void
3472ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW 4030ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3473{ 4031{
3474 clear_pending (EV_A_ (W)w); 4032 clear_pending (EV_A_ (W)w);
3475 if (expect_false (!ev_is_active (w))) 4033 if (expect_false (!ev_is_active (w)))
3476 return; 4034 return;
… …
3494 ev_stop (EV_A_ (W)w); 4052 ev_stop (EV_A_ (W)w);
3495 4053
3496 EV_FREQUENT_CHECK; 4054 EV_FREQUENT_CHECK;
3497} 4055}
3498 4056
3499void noinline 4057noinline
4058void
3500ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW 4059ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3501{ 4060{
3502 /* TODO: use adjustheap and recalculation */ 4061 /* TODO: use adjustheap and recalculation */
3503 ev_periodic_stop (EV_A_ w); 4062 ev_periodic_stop (EV_A_ w);
3504 ev_periodic_start (EV_A_ w); 4063 ev_periodic_start (EV_A_ w);
… …
3509# define SA_RESTART 0 4068# define SA_RESTART 0
3510#endif 4069#endif
3511 4070
3512#if EV_SIGNAL_ENABLE 4071#if EV_SIGNAL_ENABLE
3513 4072
3514void noinline 4073noinline
4074void
3515ev_signal_start (EV_P_ ev_signal *w) EV_THROW 4075ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3516{ 4076{
3517 if (expect_false (ev_is_active (w))) 4077 if (expect_false (ev_is_active (w)))
3518 return; 4078 return;
3519 4079
… …
3522#if EV_MULTIPLICITY 4082#if EV_MULTIPLICITY
3523 assert (("libev: a signal must not be attached to two different loops", 4083 assert (("libev: a signal must not be attached to two different loops",
3524 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4084 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3525 4085
3526 signals [w->signum - 1].loop = EV_A; 4086 signals [w->signum - 1].loop = EV_A;
4087 ECB_MEMORY_FENCE_RELEASE;
3527#endif 4088#endif
3528 4089
3529 EV_FREQUENT_CHECK; 4090 EV_FREQUENT_CHECK;
3530 4091
3531#if EV_USE_SIGNALFD 4092#if EV_USE_SIGNALFD
… …
3590 } 4151 }
3591 4152
3592 EV_FREQUENT_CHECK; 4153 EV_FREQUENT_CHECK;
3593} 4154}
3594 4155
3595void noinline 4156noinline
4157void
3596ev_signal_stop (EV_P_ ev_signal *w) EV_THROW 4158ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3597{ 4159{
3598 clear_pending (EV_A_ (W)w); 4160 clear_pending (EV_A_ (W)w);
3599 if (expect_false (!ev_is_active (w))) 4161 if (expect_false (!ev_is_active (w)))
3600 return; 4162 return;
… …
3676 4238
3677#define DEF_STAT_INTERVAL 5.0074891 4239#define DEF_STAT_INTERVAL 5.0074891
3678#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4240#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3679#define MIN_STAT_INTERVAL 0.1074891 4241#define MIN_STAT_INTERVAL 0.1074891
3680 4242
3681static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4243noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3682 4244
3683#if EV_USE_INOTIFY 4245#if EV_USE_INOTIFY
3684 4246
3685/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4247/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3686# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4248# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3687 4249
3688static void noinline 4250noinline
4251static void
3689infy_add (EV_P_ ev_stat *w) 4252infy_add (EV_P_ ev_stat *w)
3690{ 4253{
3691 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); 4254 w->wd = inotify_add_watch (fs_fd, w->path,
4255 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4256 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4257 | IN_DONT_FOLLOW | IN_MASK_ADD);
3692 4258
3693 if (w->wd >= 0) 4259 if (w->wd >= 0)
3694 { 4260 {
3695 struct statfs sfs; 4261 struct statfs sfs;
3696 4262
… …
3700 4266
3701 if (!fs_2625) 4267 if (!fs_2625)
3702 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4268 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3703 else if (!statfs (w->path, &sfs) 4269 else if (!statfs (w->path, &sfs)
3704 && (sfs.f_type == 0x1373 /* devfs */ 4270 && (sfs.f_type == 0x1373 /* devfs */
4271 || sfs.f_type == 0x4006 /* fat */
4272 || sfs.f_type == 0x4d44 /* msdos */
3705 || sfs.f_type == 0xEF53 /* ext2/3 */ 4273 || sfs.f_type == 0xEF53 /* ext2/3 */
4274 || sfs.f_type == 0x72b6 /* jffs2 */
4275 || sfs.f_type == 0x858458f6 /* ramfs */
4276 || sfs.f_type == 0x5346544e /* ntfs */
3706 || sfs.f_type == 0x3153464a /* jfs */ 4277 || sfs.f_type == 0x3153464a /* jfs */
4278 || sfs.f_type == 0x9123683e /* btrfs */
3707 || sfs.f_type == 0x52654973 /* reiser3 */ 4279 || sfs.f_type == 0x52654973 /* reiser3 */
3708 || sfs.f_type == 0x01021994 /* tempfs */ 4280 || sfs.f_type == 0x01021994 /* tmpfs */
3709 || sfs.f_type == 0x58465342 /* xfs */)) 4281 || sfs.f_type == 0x58465342 /* xfs */))
3710 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4282 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3711 else 4283 else
3712 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4284 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3713 } 4285 }
… …
3748 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4320 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3749 ev_timer_again (EV_A_ &w->timer); 4321 ev_timer_again (EV_A_ &w->timer);
3750 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4322 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3751} 4323}
3752 4324
3753static void noinline 4325noinline
4326static void
3754infy_del (EV_P_ ev_stat *w) 4327infy_del (EV_P_ ev_stat *w)
3755{ 4328{
3756 int slot; 4329 int slot;
3757 int wd = w->wd; 4330 int wd = w->wd;
3758 4331
… …
3765 4338
3766 /* remove this watcher, if others are watching it, they will rearm */ 4339 /* remove this watcher, if others are watching it, they will rearm */
3767 inotify_rm_watch (fs_fd, wd); 4340 inotify_rm_watch (fs_fd, wd);
3768} 4341}
3769 4342
3770static void noinline 4343noinline
4344static void
3771infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4345infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3772{ 4346{
3773 if (slot < 0) 4347 if (slot < 0)
3774 /* overflow, need to check for all hash slots */ 4348 /* overflow, need to check for all hash slots */
3775 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4349 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3811 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4385 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3812 ofs += sizeof (struct inotify_event) + ev->len; 4386 ofs += sizeof (struct inotify_event) + ev->len;
3813 } 4387 }
3814} 4388}
3815 4389
3816inline_size void ecb_cold 4390inline_size ecb_cold
4391void
3817ev_check_2625 (EV_P) 4392ev_check_2625 (EV_P)
3818{ 4393{
3819 /* kernels < 2.6.25 are borked 4394 /* kernels < 2.6.25 are borked
3820 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4395 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3821 */ 4396 */
… …
3919 w->attr.st_nlink = 0; 4494 w->attr.st_nlink = 0;
3920 else if (!w->attr.st_nlink) 4495 else if (!w->attr.st_nlink)
3921 w->attr.st_nlink = 1; 4496 w->attr.st_nlink = 1;
3922} 4497}
3923 4498
3924static void noinline 4499noinline
4500static void
3925stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4501stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3926{ 4502{
3927 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4503 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3928 4504
3929 ev_statdata prev = w->attr; 4505 ev_statdata prev = w->attr;
… …
4139 EV_FREQUENT_CHECK; 4715 EV_FREQUENT_CHECK;
4140} 4716}
4141#endif 4717#endif
4142 4718
4143#if EV_EMBED_ENABLE 4719#if EV_EMBED_ENABLE
4144void noinline 4720noinline
4721void
4145ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW 4722ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4146{ 4723{
4147 ev_run (w->other, EVRUN_NOWAIT); 4724 ev_run (w->other, EVRUN_NOWAIT);
4148} 4725}
4149 4726
… …
4446} 5023}
4447 5024
4448/*****************************************************************************/ 5025/*****************************************************************************/
4449 5026
4450#if EV_WALK_ENABLE 5027#if EV_WALK_ENABLE
4451void ecb_cold 5028ecb_cold
5029void
4452ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW 5030ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4453{ 5031{
4454 int i, j; 5032 int i, j;
4455 ev_watcher_list *wl, *wn; 5033 ev_watcher_list *wl, *wn;
4456 5034

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