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Comparing libev/ev.c (file contents):
Revision 1.467 by root, Fri May 16 15:15:39 2014 UTC vs.
Revision 1.481 by root, Thu Jun 1 20:25:50 2017 UTC

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
256# else 256# else
257# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
258# endif 258# endif
259#endif 259#endif
260 260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
261#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
263# define EV_USE_MONOTONIC EV_FEATURE_OS 272# define EV_USE_MONOTONIC EV_FEATURE_OS
264# else 273# else
265# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
354 363
355#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
357#endif 366#endif
358 367
359#ifdef ANDROID 368#ifdef __ANDROID__
360/* supposedly, android doesn't typedef fd_mask */ 369/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT 370# undef EV_USE_SELECT
362# define EV_USE_SELECT 0 371# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */ 372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL 373# undef EV_USE_CLOCK_SYSCALL
482/* 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 */
483/* ECB.H BEGIN */ 492/* ECB.H BEGIN */
484/* 493/*
485 * libecb - http://software.schmorp.de/pkg/libecb 494 * libecb - http://software.schmorp.de/pkg/libecb
486 * 495 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de> 496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta 497 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved. 498 * All rights reserved.
490 * 499 *
491 * 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-
492 * tion, are permitted provided that the following conditions are met: 501 * tion, are permitted provided that the following conditions are met:
523 532
524#ifndef ECB_H 533#ifndef ECB_H
525#define ECB_H 534#define ECB_H
526 535
527/* 16 bits major, 16 bits minor */ 536/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003 537#define ECB_VERSION 0x00010005
529 538
530#ifdef _WIN32 539#ifdef _WIN32
531 typedef signed char int8_t; 540 typedef signed char int8_t;
532 typedef unsigned char uint8_t; 541 typedef unsigned char uint8_t;
533 typedef signed short int16_t; 542 typedef signed short int16_t;
550 typedef uint32_t uintptr_t; 559 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t; 560 typedef int32_t intptr_t;
552 #endif 561 #endif
553#else 562#else
554 #include <inttypes.h> 563 #include <inttypes.h>
555 #if UINTMAX_MAX > 0xffffffffU 564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
556 #define ECB_PTRSIZE 8 565 #define ECB_PTRSIZE 8
557 #else 566 #else
558 #define ECB_PTRSIZE 4 567 #define ECB_PTRSIZE 4
559 #endif 568 #endif
560#endif 569#endif
561 570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
562/* work around x32 idiocy by defining proper macros */ 574/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
564 #if _ILP32 576 #if _ILP32
565 #define ECB_AMD64_X32 1 577 #define ECB_AMD64_X32 1
566 #else 578 #else
567 #define ECB_AMD64 1 579 #define ECB_AMD64 1
568 #endif 580 #endif
573 * causing enormous grief in return for some better fake benchmark numbers. 585 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so. 586 * or so.
575 * 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
576 * 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.
577 */ 589 */
578#ifndef ECB_GCC_VERSION
579 #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__
580 #define ECB_GCC_VERSION(major,minor) 0 591 #define ECB_GCC_VERSION(major,minor) 0
581 #else 592#else
582 #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)))
583 #endif 594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
584#endif 608#endif
585 609
586#define ECB_CPP (__cplusplus+0) 610#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L) 611#define ECB_CPP11 (__cplusplus >= 201103L)
588 612
616 #define ECB_NO_SMP 1 640 #define ECB_NO_SMP 1
617#endif 641#endif
618 642
619#if ECB_NO_SMP 643#if ECB_NO_SMP
620 #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 */
621#endif 654#endif
622 655
623#ifndef ECB_MEMORY_FENCE 656#ifndef ECB_MEMORY_FENCE
624 #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
625 #if __i386 || __i386__ 658 #if __i386 || __i386__
626 #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")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 662 #elif ECB_GCC_AMD64
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #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 */
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
637 #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")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__ 682 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") 683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8 684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
644 #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")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__ 688 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
672 /* see comment below (stdatomic.h) about the C11 memory model. */ 713 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) 715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) 716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676 717
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 718 #elif ECB_CLANG_EXTENSION(c_atomic)
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model. 719 /* see comment below (stdatomic.h) about the C11 memory model. */
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) 721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) 722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687 723
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize () 725 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ 727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif 791#endif
756 792
757/*****************************************************************************/ 793/*****************************************************************************/
758 794
759#if __cplusplus 795#if ECB_CPP
760 #define ecb_inline static inline 796 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5) 797#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__ 798 #define ecb_inline static __inline__
763#elif ECB_C99 799#elif ECB_C99
764 #define ecb_inline static inline 800 #define ecb_inline static inline
778 814
779#define ECB_CONCAT_(a, b) a ## b 815#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a 817#define ECB_STRINGIFY_(a) # a
782#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))
783 820
784#define ecb_function_ ecb_inline 821#define ecb_function_ ecb_inline
785 822
786#if ECB_GCC_VERSION(3,1) 823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
787 #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)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr) 830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else 831#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types 832 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct; 833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ 834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797 835
798 #define ecb_is_constant(expr) 0 836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
841#else
799 #define ecb_expect(expr,value) (expr) 842 #define ecb_expect(expr,value) (expr)
843#endif
844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
847#else
800 #define ecb_prefetch(addr,rw,locality) 848 #define ecb_prefetch(addr,rw,locality)
801#endif 849#endif
802 850
803/* no emulation for ecb_decltype */ 851/* no emulation for ecb_decltype */
804#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; };
805 #define ecb_decltype(x) __decltype(x) 855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
806#elif ECB_GCC_VERSION(3,0) 856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
807 #define ecb_decltype(x) __typeof(x) 857 #define ecb_decltype(x) __typeof__ (x)
808#endif 858#endif
809 859
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
810#define ecb_noinline ecb_attribute ((__noinline__)) 877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
811#define ecb_unused ecb_attribute ((__unused__)) 880#define ecb_unused ecb_attribute ((__unused__))
812#define ecb_const ecb_attribute ((__const__)) 881#define ecb_const ecb_attribute ((__const__))
813#define ecb_pure ecb_attribute ((__pure__)) 882#define ecb_pure ecb_attribute ((__pure__))
814 883
815#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 */
816 #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)
817#else 892#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__)) 893 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif 894#endif
820 895
821#if ECB_GCC_VERSION(4,3) 896#if ECB_GCC_VERSION(4,3)
836/* for compatibility to the rest of the world */ 911/* for compatibility to the rest of the world */
837#define ecb_likely(expr) ecb_expect_true (expr) 912#define ecb_likely(expr) ecb_expect_true (expr)
838#define ecb_unlikely(expr) ecb_expect_false (expr) 913#define ecb_unlikely(expr) ecb_expect_false (expr)
839 914
840/* count trailing zero bits and count # of one bits */ 915/* count trailing zero bits and count # of one bits */
841#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))
842 /* 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 */
843 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
844 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
845 #define ecb_ctz32(x) __builtin_ctz (x) 923 #define ecb_ctz32(x) __builtin_ctz (x)
846 #define ecb_ctz64(x) __builtin_ctzll (x) 924 #define ecb_ctz64(x) __builtin_ctzll (x)
847 #define ecb_popcount32(x) __builtin_popcount (x) 925 #define ecb_popcount32(x) __builtin_popcount (x)
848 /* no popcountll */ 926 /* no popcountll */
849#else 927#else
850 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
851 ecb_function_ int 929 ecb_function_ ecb_const int
852 ecb_ctz32 (uint32_t x) 930 ecb_ctz32 (uint32_t x)
853 { 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
854 int r = 0; 937 int r = 0;
855 938
856 x &= ~x + 1; /* this isolates the lowest bit */ 939 x &= ~x + 1; /* this isolates the lowest bit */
857 940
858#if ECB_branchless_on_i386 941#if ECB_branchless_on_i386
868 if (x & 0xff00ff00) r += 8; 951 if (x & 0xff00ff00) r += 8;
869 if (x & 0xffff0000) r += 16; 952 if (x & 0xffff0000) r += 16;
870#endif 953#endif
871 954
872 return r; 955 return r;
956#endif
873 } 957 }
874 958
875 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
876 ecb_function_ int 960 ecb_function_ ecb_const int
877 ecb_ctz64 (uint64_t x) 961 ecb_ctz64 (uint64_t x)
878 { 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
879 int shift = x & 0xffffffffU ? 0 : 32; 968 int shift = x & 0xffffffff ? 0 : 32;
880 return ecb_ctz32 (x >> shift) + shift; 969 return ecb_ctz32 (x >> shift) + shift;
970#endif
881 } 971 }
882 972
883 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
884 ecb_function_ int 974 ecb_function_ ecb_const int
885 ecb_popcount32 (uint32_t x) 975 ecb_popcount32 (uint32_t x)
886 { 976 {
887 x -= (x >> 1) & 0x55555555; 977 x -= (x >> 1) & 0x55555555;
888 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
889 x = ((x >> 4) + x) & 0x0f0f0f0f; 979 x = ((x >> 4) + x) & 0x0f0f0f0f;
890 x *= 0x01010101; 980 x *= 0x01010101;
891 981
892 return x >> 24; 982 return x >> 24;
893 } 983 }
894 984
895 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
896 ecb_function_ int ecb_ld32 (uint32_t x) 986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
897 { 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
898 int r = 0; 993 int r = 0;
899 994
900 if (x >> 16) { x >>= 16; r += 16; } 995 if (x >> 16) { x >>= 16; r += 16; }
901 if (x >> 8) { x >>= 8; r += 8; } 996 if (x >> 8) { x >>= 8; r += 8; }
902 if (x >> 4) { x >>= 4; r += 4; } 997 if (x >> 4) { x >>= 4; r += 4; }
903 if (x >> 2) { x >>= 2; r += 2; } 998 if (x >> 2) { x >>= 2; r += 2; }
904 if (x >> 1) { r += 1; } 999 if (x >> 1) { r += 1; }
905 1000
906 return r; 1001 return r;
1002#endif
907 } 1003 }
908 1004
909 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
910 ecb_function_ int ecb_ld64 (uint64_t x) 1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
911 { 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
912 int r = 0; 1013 int r = 0;
913 1014
914 if (x >> 32) { x >>= 32; r += 32; } 1015 if (x >> 32) { x >>= 32; r += 32; }
915 1016
916 return r + ecb_ld32 (x); 1017 return r + ecb_ld32 (x);
1018#endif
917 } 1019 }
918#endif 1020#endif
919 1021
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
921ecb_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)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
923ecb_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)); }
924 1026
925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
927{ 1029{
928 return ( (x * 0x0802U & 0x22110U) 1030 return ( (x * 0x0802U & 0x22110U)
929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
930} 1032}
931 1033
932ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
933ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
934{ 1036{
935 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
936 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
937 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
938 x = ( x >> 8 ) | ( x << 8); 1040 x = ( x >> 8 ) | ( x << 8);
939 1041
940 return x; 1042 return x;
941} 1043}
942 1044
943ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
944ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
945{ 1047{
946 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
947 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
948 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
949 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
952 return x; 1054 return x;
953} 1055}
954 1056
955/* popcount64 is only available on 64 bit cpus as gcc builtin */ 1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
956/* so for this version we are lazy */ 1058/* so for this version we are lazy */
957ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
958ecb_function_ int 1060ecb_function_ ecb_const int
959ecb_popcount64 (uint64_t x) 1061ecb_popcount64 (uint64_t x)
960{ 1062{
961 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
962} 1064}
963 1065
964ecb_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);
965ecb_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);
966ecb_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);
967ecb_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);
968ecb_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);
969ecb_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);
970ecb_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);
971ecb_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);
972 1074
973ecb_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); }
974ecb_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); }
975ecb_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); }
976ecb_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); }
977ecb_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); }
978ecb_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); }
979ecb_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); }
980ecb_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); }
981 1083
982#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
983 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
984 #define ecb_bswap32(x) __builtin_bswap32 (x) 1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
985 #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)))
986#else 1097#else
987 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
988 ecb_function_ uint16_t 1099 ecb_function_ ecb_const uint16_t
989 ecb_bswap16 (uint16_t x) 1100 ecb_bswap16 (uint16_t x)
990 { 1101 {
991 return ecb_rotl16 (x, 8); 1102 return ecb_rotl16 (x, 8);
992 } 1103 }
993 1104
994 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
995 ecb_function_ uint32_t 1106 ecb_function_ ecb_const uint32_t
996 ecb_bswap32 (uint32_t x) 1107 ecb_bswap32 (uint32_t x)
997 { 1108 {
998 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
999 } 1110 }
1000 1111
1001 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1002 ecb_function_ uint64_t 1113 ecb_function_ ecb_const uint64_t
1003 ecb_bswap64 (uint64_t x) 1114 ecb_bswap64 (uint64_t x)
1004 { 1115 {
1005 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1006 } 1117 }
1007#endif 1118#endif
1008 1119
1009#if ECB_GCC_VERSION(4,5) 1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1010 #define ecb_unreachable() __builtin_unreachable () 1121 #define ecb_unreachable() __builtin_unreachable ()
1011#else 1122#else
1012 /* 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 :/ */
1013 ecb_inline void ecb_unreachable (void) ecb_noreturn; 1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1014 ecb_inline void ecb_unreachable (void) { } 1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1015#endif 1126#endif
1016 1127
1017/* try to tell the compiler that some condition is definitely true */ 1128/* try to tell the compiler that some condition is definitely true */
1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1019 1130
1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1021ecb_inline unsigned char 1132ecb_inline ecb_const uint32_t
1022ecb_byteorder_helper (void) 1133ecb_byteorder_helper (void)
1023{ 1134{
1024 /* the union code still generates code under pressure in gcc, */ 1135 /* the union code still generates code under pressure in gcc, */
1025 /* but less than using pointers, and always seems to */ 1136 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */ 1137 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */ 1138 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */ 1139 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */ 1140 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 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
1033 return 0x44; 1144 return 0x44332211;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1035 return 0x11; 1148 return 0x11223344;
1036#else 1149#else
1037 union 1150 union
1038 { 1151 {
1152 uint8_t c[4];
1039 uint32_t i; 1153 uint32_t u;
1040 uint8_t c;
1041 } u = { 0x11223344 }; 1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1042 return u.c; 1155 return u.u;
1043#endif 1156#endif
1044} 1157}
1045 1158
1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1047ecb_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; }
1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1049ecb_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; }
1050 1163
1051#if ECB_GCC_VERSION(3,0) || ECB_C99 1164#if ECB_GCC_VERSION(3,0) || ECB_C99
1052 #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))
1053#else 1166#else
1054 #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)))
1055#endif 1168#endif
1056 1169
1057#if __cplusplus 1170#if ECB_CPP
1058 template<typename T> 1171 template<typename T>
1059 static inline T ecb_div_rd (T val, T div) 1172 static inline T ecb_div_rd (T val, T div)
1060 { 1173 {
1061 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1062 } 1175 }
1079 } 1192 }
1080#else 1193#else
1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1082#endif 1195#endif
1083 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
1084/*******************************************************************************/ 1293/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086 1295
1087/* basically, everything uses "ieee pure-endian" floating point numbers */ 1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \ 1298#if 0 \
1090 || __i386 || __i386__ \ 1299 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 1300 || ECB_GCC_AMD64 \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \ 1302 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \ 1303 || defined __mips__ \
1095 || defined __alpha__ \ 1304 || defined __alpha__ \
1096 || defined __hppa__ \ 1305 || defined __hppa__ \
1097 || defined __ia64__ \ 1306 || defined __ia64__ \
1098 || defined __m68k__ \ 1307 || defined __m68k__ \
1099 || defined __m88k__ \ 1308 || defined __m88k__ \
1100 || defined __sh__ \ 1309 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__ 1312 || defined __aarch64__
1104 #define ECB_STDFP 1 1313 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */ 1314 #include <string.h> /* for memcpy */
1106#else 1315#else
1122 #define ECB_NAN NAN 1331 #define ECB_NAN NAN
1123 #else 1332 #else
1124 #define ECB_NAN ECB_INFINITY 1333 #define ECB_NAN ECB_INFINITY
1125 #endif 1334 #endif
1126 1335
1127 /* converts an ieee half/binary16 to a float */ 1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1129 ecb_function_ float 1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1130 ecb_binary16_to_float (uint16_t x) 1339 #else
1131 { 1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1132 int e = (x >> 10) & 0x1f; 1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1133 int m = x & 0x3ff; 1342 #endif
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143 1343
1144 /* convert a float to ieee single/binary32 */ 1344 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1146 ecb_function_ uint32_t 1346 ecb_function_ ecb_const uint32_t
1147 ecb_float_to_binary32 (float x) 1347 ecb_float_to_binary32 (float x)
1148 { 1348 {
1149 uint32_t r; 1349 uint32_t r;
1150 1350
1151 #if ECB_STDFP 1351 #if ECB_STDFP
1158 if (x == 0e0f ) return 0x00000000U; 1358 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U; 1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU; 1361 if (x != x ) return 0x7fbfffffU;
1162 1362
1163 m = frexpf (x, &e) * 0x1000000U; 1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1164 1364
1165 r = m & 0x80000000U; 1365 r = m & 0x80000000U;
1166 1366
1167 if (r) 1367 if (r)
1168 m = -m; 1368 m = -m;
1180 1380
1181 return r; 1381 return r;
1182 } 1382 }
1183 1383
1184 /* converts an ieee single/binary32 to a float */ 1384 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1186 ecb_function_ float 1386 ecb_function_ ecb_const float
1187 ecb_binary32_to_float (uint32_t x) 1387 ecb_binary32_to_float (uint32_t x)
1188 { 1388 {
1189 float r; 1389 float r;
1190 1390
1191 #if ECB_STDFP 1391 #if ECB_STDFP
1201 x |= 0x800000U; 1401 x |= 0x800000U;
1202 else 1402 else
1203 e = 1; 1403 e = 1;
1204 1404
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1207 1407
1208 r = neg ? -r : r; 1408 r = neg ? -r : r;
1209 #endif 1409 #endif
1210 1410
1211 return r; 1411 return r;
1212 } 1412 }
1213 1413
1214 /* convert a double to ieee double/binary64 */ 1414 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1216 ecb_function_ uint64_t 1416 ecb_function_ ecb_const uint64_t
1217 ecb_double_to_binary64 (double x) 1417 ecb_double_to_binary64 (double x)
1218 { 1418 {
1219 uint64_t r; 1419 uint64_t r;
1220 1420
1221 #if ECB_STDFP 1421 #if ECB_STDFP
1250 1450
1251 return r; 1451 return r;
1252 } 1452 }
1253 1453
1254 /* converts an ieee double/binary64 to a double */ 1454 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1256 ecb_function_ double 1456 ecb_function_ ecb_const double
1257 ecb_binary64_to_double (uint64_t x) 1457 ecb_binary64_to_double (uint64_t x)
1258 { 1458 {
1259 double r; 1459 double r;
1260 1460
1261 #if ECB_STDFP 1461 #if ECB_STDFP
1277 1477
1278 r = neg ? -r : r; 1478 r = neg ? -r : r;
1279 #endif 1479 #endif
1280 1480
1281 return r; 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));
1282 } 1498 }
1283 1499
1284#endif 1500#endif
1285 1501
1286#endif 1502#endif
1311#define inline_size ecb_inline 1527#define inline_size ecb_inline
1312 1528
1313#if EV_FEATURE_CODE 1529#if EV_FEATURE_CODE
1314# define inline_speed ecb_inline 1530# define inline_speed ecb_inline
1315#else 1531#else
1316# define inline_speed static noinline 1532# define inline_speed noinline static
1317#endif 1533#endif
1318 1534
1319#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1320 1536
1321#if EV_MINPRI == EV_MAXPRI 1537#if EV_MINPRI == EV_MAXPRI
1368#else 1584#else
1369 1585
1370#include <float.h> 1586#include <float.h>
1371 1587
1372/* a floor() replacement function, should be independent of ev_tstamp type */ 1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589noinline
1373static ev_tstamp noinline 1590static ev_tstamp
1374ev_floor (ev_tstamp v) 1591ev_floor (ev_tstamp v)
1375{ 1592{
1376 /* the choice of shift factor is not terribly important */ 1593 /* the choice of shift factor is not terribly important */
1377#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1594#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1378 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1595 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1410 1627
1411#ifdef __linux 1628#ifdef __linux
1412# include <sys/utsname.h> 1629# include <sys/utsname.h>
1413#endif 1630#endif
1414 1631
1415static unsigned int noinline ecb_cold 1632noinline ecb_cold
1633static unsigned int
1416ev_linux_version (void) 1634ev_linux_version (void)
1417{ 1635{
1418#ifdef __linux 1636#ifdef __linux
1419 unsigned int v = 0; 1637 unsigned int v = 0;
1420 struct utsname buf; 1638 struct utsname buf;
1449} 1667}
1450 1668
1451/*****************************************************************************/ 1669/*****************************************************************************/
1452 1670
1453#if EV_AVOID_STDIO 1671#if EV_AVOID_STDIO
1454static void noinline ecb_cold 1672noinline ecb_cold
1673static void
1455ev_printerr (const char *msg) 1674ev_printerr (const char *msg)
1456{ 1675{
1457 write (STDERR_FILENO, msg, strlen (msg)); 1676 write (STDERR_FILENO, msg, strlen (msg));
1458} 1677}
1459#endif 1678#endif
1460 1679
1461static void (*syserr_cb)(const char *msg) EV_THROW; 1680static void (*syserr_cb)(const char *msg) EV_THROW;
1462 1681
1463void ecb_cold 1682ecb_cold
1683void
1464ev_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
1465{ 1685{
1466 syserr_cb = cb; 1686 syserr_cb = cb;
1467} 1687}
1468 1688
1469static void noinline ecb_cold 1689noinline ecb_cold
1690static void
1470ev_syserr (const char *msg) 1691ev_syserr (const char *msg)
1471{ 1692{
1472 if (!msg) 1693 if (!msg)
1473 msg = "(libev) system error"; 1694 msg = "(libev) system error";
1474 1695
1505 return 0; 1726 return 0;
1506} 1727}
1507 1728
1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; 1729static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1509 1730
1510void ecb_cold 1731ecb_cold
1732void
1511ev_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
1512{ 1734{
1513 alloc = cb; 1735 alloc = cb;
1514} 1736}
1515 1737
1724 } 1946 }
1725 1947
1726 return ncur; 1948 return ncur;
1727} 1949}
1728 1950
1729static void * noinline ecb_cold 1951noinline ecb_cold
1952static void *
1730array_realloc (int elem, void *base, int *cur, int cnt) 1953array_realloc (int elem, void *base, int *cur, int cnt)
1731{ 1954{
1732 *cur = array_nextsize (elem, *cur, cnt); 1955 *cur = array_nextsize (elem, *cur, cnt);
1733 return ev_realloc (base, elem * *cur); 1956 return ev_realloc (base, elem * *cur);
1734} 1957}
1737 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1960 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1738 1961
1739#define array_needsize(type,base,cur,cnt,init) \ 1962#define array_needsize(type,base,cur,cnt,init) \
1740 if (expect_false ((cnt) > (cur))) \ 1963 if (expect_false ((cnt) > (cur))) \
1741 { \ 1964 { \
1742 int ecb_unused ocur_ = (cur); \ 1965 ecb_unused int ocur_ = (cur); \
1743 (base) = (type *)array_realloc \ 1966 (base) = (type *)array_realloc \
1744 (sizeof (type), (base), &(cur), (cnt)); \ 1967 (sizeof (type), (base), &(cur), (cnt)); \
1745 init ((base) + (ocur_), (cur) - ocur_); \ 1968 init ((base) + (ocur_), (cur) - ocur_); \
1746 } 1969 }
1747 1970
1759 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1982 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1760 1983
1761/*****************************************************************************/ 1984/*****************************************************************************/
1762 1985
1763/* dummy callback for pending events */ 1986/* dummy callback for pending events */
1764static void noinline 1987noinline
1988static void
1765pendingcb (EV_P_ ev_prepare *w, int revents) 1989pendingcb (EV_P_ ev_prepare *w, int revents)
1766{ 1990{
1767} 1991}
1768 1992
1769void noinline 1993noinline
1994void
1770ev_feed_event (EV_P_ void *w, int revents) EV_THROW 1995ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1771{ 1996{
1772 W w_ = (W)w; 1997 W w_ = (W)w;
1773 int pri = ABSPRI (w_); 1998 int pri = ABSPRI (w_);
1774 1999
1904 2129
1905 fdchangecnt = 0; 2130 fdchangecnt = 0;
1906} 2131}
1907 2132
1908/* something about the given fd changed */ 2133/* something about the given fd changed */
1909inline_size void 2134inline_size
2135void
1910fd_change (EV_P_ int fd, int flags) 2136fd_change (EV_P_ int fd, int flags)
1911{ 2137{
1912 unsigned char reify = anfds [fd].reify; 2138 unsigned char reify = anfds [fd].reify;
1913 anfds [fd].reify |= flags; 2139 anfds [fd].reify |= flags;
1914 2140
1919 fdchanges [fdchangecnt - 1] = fd; 2145 fdchanges [fdchangecnt - 1] = fd;
1920 } 2146 }
1921} 2147}
1922 2148
1923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2149/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1924inline_speed void ecb_cold 2150inline_speed ecb_cold void
1925fd_kill (EV_P_ int fd) 2151fd_kill (EV_P_ int fd)
1926{ 2152{
1927 ev_io *w; 2153 ev_io *w;
1928 2154
1929 while ((w = (ev_io *)anfds [fd].head)) 2155 while ((w = (ev_io *)anfds [fd].head))
1932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2158 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1933 } 2159 }
1934} 2160}
1935 2161
1936/* check whether the given fd is actually valid, for error recovery */ 2162/* check whether the given fd is actually valid, for error recovery */
1937inline_size int ecb_cold 2163inline_size ecb_cold int
1938fd_valid (int fd) 2164fd_valid (int fd)
1939{ 2165{
1940#ifdef _WIN32 2166#ifdef _WIN32
1941 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2167 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1942#else 2168#else
1943 return fcntl (fd, F_GETFD) != -1; 2169 return fcntl (fd, F_GETFD) != -1;
1944#endif 2170#endif
1945} 2171}
1946 2172
1947/* called on EBADF to verify fds */ 2173/* called on EBADF to verify fds */
1948static void noinline ecb_cold 2174noinline ecb_cold
2175static void
1949fd_ebadf (EV_P) 2176fd_ebadf (EV_P)
1950{ 2177{
1951 int fd; 2178 int fd;
1952 2179
1953 for (fd = 0; fd < anfdmax; ++fd) 2180 for (fd = 0; fd < anfdmax; ++fd)
1955 if (!fd_valid (fd) && errno == EBADF) 2182 if (!fd_valid (fd) && errno == EBADF)
1956 fd_kill (EV_A_ fd); 2183 fd_kill (EV_A_ fd);
1957} 2184}
1958 2185
1959/* called on ENOMEM in select/poll to kill some fds and retry */ 2186/* called on ENOMEM in select/poll to kill some fds and retry */
1960static void noinline ecb_cold 2187noinline ecb_cold
2188static void
1961fd_enomem (EV_P) 2189fd_enomem (EV_P)
1962{ 2190{
1963 int fd; 2191 int fd;
1964 2192
1965 for (fd = anfdmax; fd--; ) 2193 for (fd = anfdmax; fd--; )
1969 break; 2197 break;
1970 } 2198 }
1971} 2199}
1972 2200
1973/* usually called after fork if backend needs to re-arm all fds from scratch */ 2201/* usually called after fork if backend needs to re-arm all fds from scratch */
1974static void noinline 2202noinline
2203static void
1975fd_rearm_all (EV_P) 2204fd_rearm_all (EV_P)
1976{ 2205{
1977 int fd; 2206 int fd;
1978 2207
1979 for (fd = 0; fd < anfdmax; ++fd) 2208 for (fd = 0; fd < anfdmax; ++fd)
2160 2389
2161/*****************************************************************************/ 2390/*****************************************************************************/
2162 2391
2163#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2392#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2164 2393
2165static void noinline ecb_cold 2394noinline ecb_cold
2395static void
2166evpipe_init (EV_P) 2396evpipe_init (EV_P)
2167{ 2397{
2168 if (!ev_is_active (&pipe_w)) 2398 if (!ev_is_active (&pipe_w))
2169 { 2399 {
2170 int fds [2]; 2400 int fds [2];
2348#endif 2578#endif
2349 2579
2350 ev_feed_signal (signum); 2580 ev_feed_signal (signum);
2351} 2581}
2352 2582
2353void noinline 2583noinline
2584void
2354ev_feed_signal_event (EV_P_ int signum) EV_THROW 2585ev_feed_signal_event (EV_P_ int signum) EV_THROW
2355{ 2586{
2356 WL w; 2587 WL w;
2357 2588
2358 if (expect_false (signum <= 0 || signum >= EV_NSIG)) 2589 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2475#endif 2706#endif
2476#if EV_USE_SELECT 2707#if EV_USE_SELECT
2477# include "ev_select.c" 2708# include "ev_select.c"
2478#endif 2709#endif
2479 2710
2480int ecb_cold 2711ecb_cold int
2481ev_version_major (void) EV_THROW 2712ev_version_major (void) EV_THROW
2482{ 2713{
2483 return EV_VERSION_MAJOR; 2714 return EV_VERSION_MAJOR;
2484} 2715}
2485 2716
2486int ecb_cold 2717ecb_cold int
2487ev_version_minor (void) EV_THROW 2718ev_version_minor (void) EV_THROW
2488{ 2719{
2489 return EV_VERSION_MINOR; 2720 return EV_VERSION_MINOR;
2490} 2721}
2491 2722
2492/* return true if we are running with elevated privileges and should ignore env variables */ 2723/* return true if we are running with elevated privileges and should ignore env variables */
2493int inline_size ecb_cold 2724inline_size ecb_cold int
2494enable_secure (void) 2725enable_secure (void)
2495{ 2726{
2496#ifdef _WIN32 2727#ifdef _WIN32
2497 return 0; 2728 return 0;
2498#else 2729#else
2499 return getuid () != geteuid () 2730 return getuid () != geteuid ()
2500 || getgid () != getegid (); 2731 || getgid () != getegid ();
2501#endif 2732#endif
2502} 2733}
2503 2734
2504unsigned int ecb_cold 2735ecb_cold
2736unsigned int
2505ev_supported_backends (void) EV_THROW 2737ev_supported_backends (void) EV_THROW
2506{ 2738{
2507 unsigned int flags = 0; 2739 unsigned int flags = 0;
2508 2740
2509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2514 2746
2515 return flags; 2747 return flags;
2516} 2748}
2517 2749
2518unsigned int ecb_cold 2750ecb_cold
2751unsigned int
2519ev_recommended_backends (void) EV_THROW 2752ev_recommended_backends (void) EV_THROW
2520{ 2753{
2521 unsigned int flags = ev_supported_backends (); 2754 unsigned int flags = ev_supported_backends ();
2522 2755
2523#ifndef __NetBSD__ 2756#ifndef __NetBSD__
2535#endif 2768#endif
2536 2769
2537 return flags; 2770 return flags;
2538} 2771}
2539 2772
2540unsigned int ecb_cold 2773ecb_cold
2774unsigned int
2541ev_embeddable_backends (void) EV_THROW 2775ev_embeddable_backends (void) EV_THROW
2542{ 2776{
2543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2777 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2544 2778
2545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2779 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2597{ 2831{
2598 invoke_cb = invoke_pending_cb; 2832 invoke_cb = invoke_pending_cb;
2599} 2833}
2600 2834
2601void 2835void
2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW 2836ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2603{ 2837{
2604 release_cb = release; 2838 release_cb = release;
2605 acquire_cb = acquire; 2839 acquire_cb = acquire;
2606} 2840}
2607#endif 2841#endif
2608 2842
2609/* initialise a loop structure, must be zero-initialised */ 2843/* initialise a loop structure, must be zero-initialised */
2610static void noinline ecb_cold 2844noinline ecb_cold
2845static void
2611loop_init (EV_P_ unsigned int flags) EV_THROW 2846loop_init (EV_P_ unsigned int flags) EV_THROW
2612{ 2847{
2613 if (!backend) 2848 if (!backend)
2614 { 2849 {
2615 origflags = flags; 2850 origflags = flags;
2702#endif 2937#endif
2703 } 2938 }
2704} 2939}
2705 2940
2706/* free up a loop structure */ 2941/* free up a loop structure */
2707void ecb_cold 2942ecb_cold
2943void
2708ev_loop_destroy (EV_P) 2944ev_loop_destroy (EV_P)
2709{ 2945{
2710 int i; 2946 int i;
2711 2947
2712#if EV_MULTIPLICITY 2948#if EV_MULTIPLICITY
2833#if EV_USE_INOTIFY 3069#if EV_USE_INOTIFY
2834 infy_fork (EV_A); 3070 infy_fork (EV_A);
2835#endif 3071#endif
2836 3072
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3073#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2838 if (ev_is_active (&pipe_w)) 3074 if (ev_is_active (&pipe_w) && postfork != 2)
2839 { 3075 {
2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3076 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2841 3077
2842 ev_ref (EV_A); 3078 ev_ref (EV_A);
2843 ev_io_stop (EV_A_ &pipe_w); 3079 ev_io_stop (EV_A_ &pipe_w);
2854 postfork = 0; 3090 postfork = 0;
2855} 3091}
2856 3092
2857#if EV_MULTIPLICITY 3093#if EV_MULTIPLICITY
2858 3094
3095ecb_cold
2859struct ev_loop * ecb_cold 3096struct ev_loop *
2860ev_loop_new (unsigned int flags) EV_THROW 3097ev_loop_new (unsigned int flags) EV_THROW
2861{ 3098{
2862 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3099 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2863 3100
2864 memset (EV_A, 0, sizeof (struct ev_loop)); 3101 memset (EV_A, 0, sizeof (struct ev_loop));
2872} 3109}
2873 3110
2874#endif /* multiplicity */ 3111#endif /* multiplicity */
2875 3112
2876#if EV_VERIFY 3113#if EV_VERIFY
2877static void noinline ecb_cold 3114noinline ecb_cold
3115static void
2878verify_watcher (EV_P_ W w) 3116verify_watcher (EV_P_ W w)
2879{ 3117{
2880 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3118 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2881 3119
2882 if (w->pending) 3120 if (w->pending)
2883 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3121 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2884} 3122}
2885 3123
2886static void noinline ecb_cold 3124noinline ecb_cold
3125static void
2887verify_heap (EV_P_ ANHE *heap, int N) 3126verify_heap (EV_P_ ANHE *heap, int N)
2888{ 3127{
2889 int i; 3128 int i;
2890 3129
2891 for (i = HEAP0; i < N + HEAP0; ++i) 3130 for (i = HEAP0; i < N + HEAP0; ++i)
2896 3135
2897 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3136 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2898 } 3137 }
2899} 3138}
2900 3139
2901static void noinline ecb_cold 3140noinline ecb_cold
3141static void
2902array_verify (EV_P_ W *ws, int cnt) 3142array_verify (EV_P_ W *ws, int cnt)
2903{ 3143{
2904 while (cnt--) 3144 while (cnt--)
2905 { 3145 {
2906 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3146 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2995#endif 3235#endif
2996} 3236}
2997#endif 3237#endif
2998 3238
2999#if EV_MULTIPLICITY 3239#if EV_MULTIPLICITY
3240ecb_cold
3000struct ev_loop * ecb_cold 3241struct ev_loop *
3001#else 3242#else
3002int 3243int
3003#endif 3244#endif
3004ev_default_loop (unsigned int flags) EV_THROW 3245ev_default_loop (unsigned int flags) EV_THROW
3005{ 3246{
3053 count += pendingcnt [pri]; 3294 count += pendingcnt [pri];
3054 3295
3055 return count; 3296 return count;
3056} 3297}
3057 3298
3058void noinline 3299noinline
3300void
3059ev_invoke_pending (EV_P) 3301ev_invoke_pending (EV_P)
3060{ 3302{
3061 pendingpri = NUMPRI; 3303 pendingpri = NUMPRI;
3062 3304
3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */ 3305 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3138 } 3380 }
3139} 3381}
3140 3382
3141#if EV_PERIODIC_ENABLE 3383#if EV_PERIODIC_ENABLE
3142 3384
3143static void noinline 3385noinline
3386static void
3144periodic_recalc (EV_P_ ev_periodic *w) 3387periodic_recalc (EV_P_ ev_periodic *w)
3145{ 3388{
3146 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3389 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3147 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); 3390 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3148 3391
3206 } 3449 }
3207} 3450}
3208 3451
3209/* simply recalculate all periodics */ 3452/* simply recalculate all periodics */
3210/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3453/* TODO: maybe ensure that at least one event happens when jumping forward? */
3211static void noinline ecb_cold 3454noinline ecb_cold
3455static void
3212periodics_reschedule (EV_P) 3456periodics_reschedule (EV_P)
3213{ 3457{
3214 int i; 3458 int i;
3215 3459
3216 /* adjust periodics after time jump */ 3460 /* adjust periodics after time jump */
3229 reheap (periodics, periodiccnt); 3473 reheap (periodics, periodiccnt);
3230} 3474}
3231#endif 3475#endif
3232 3476
3233/* adjust all timers by a given offset */ 3477/* adjust all timers by a given offset */
3234static void noinline ecb_cold 3478noinline ecb_cold
3479static void
3235timers_reschedule (EV_P_ ev_tstamp adjust) 3480timers_reschedule (EV_P_ ev_tstamp adjust)
3236{ 3481{
3237 int i; 3482 int i;
3238 3483
3239 for (i = 0; i < timercnt; ++i) 3484 for (i = 0; i < timercnt; ++i)
3607 w->active = 0; 3852 w->active = 0;
3608} 3853}
3609 3854
3610/*****************************************************************************/ 3855/*****************************************************************************/
3611 3856
3612void noinline 3857noinline
3858void
3613ev_io_start (EV_P_ ev_io *w) EV_THROW 3859ev_io_start (EV_P_ ev_io *w) EV_THROW
3614{ 3860{
3615 int fd = w->fd; 3861 int fd = w->fd;
3616 3862
3617 if (expect_false (ev_is_active (w))) 3863 if (expect_false (ev_is_active (w)))
3633 w->events &= ~EV__IOFDSET; 3879 w->events &= ~EV__IOFDSET;
3634 3880
3635 EV_FREQUENT_CHECK; 3881 EV_FREQUENT_CHECK;
3636} 3882}
3637 3883
3638void noinline 3884noinline
3885void
3639ev_io_stop (EV_P_ ev_io *w) EV_THROW 3886ev_io_stop (EV_P_ ev_io *w) EV_THROW
3640{ 3887{
3641 clear_pending (EV_A_ (W)w); 3888 clear_pending (EV_A_ (W)w);
3642 if (expect_false (!ev_is_active (w))) 3889 if (expect_false (!ev_is_active (w)))
3643 return; 3890 return;
3652 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3899 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3653 3900
3654 EV_FREQUENT_CHECK; 3901 EV_FREQUENT_CHECK;
3655} 3902}
3656 3903
3657void noinline 3904noinline
3905void
3658ev_timer_start (EV_P_ ev_timer *w) EV_THROW 3906ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3659{ 3907{
3660 if (expect_false (ev_is_active (w))) 3908 if (expect_false (ev_is_active (w)))
3661 return; 3909 return;
3662 3910
3676 EV_FREQUENT_CHECK; 3924 EV_FREQUENT_CHECK;
3677 3925
3678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3926 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3679} 3927}
3680 3928
3681void noinline 3929noinline
3930void
3682ev_timer_stop (EV_P_ ev_timer *w) EV_THROW 3931ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3683{ 3932{
3684 clear_pending (EV_A_ (W)w); 3933 clear_pending (EV_A_ (W)w);
3685 if (expect_false (!ev_is_active (w))) 3934 if (expect_false (!ev_is_active (w)))
3686 return; 3935 return;
3706 ev_stop (EV_A_ (W)w); 3955 ev_stop (EV_A_ (W)w);
3707 3956
3708 EV_FREQUENT_CHECK; 3957 EV_FREQUENT_CHECK;
3709} 3958}
3710 3959
3711void noinline 3960noinline
3961void
3712ev_timer_again (EV_P_ ev_timer *w) EV_THROW 3962ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3713{ 3963{
3714 EV_FREQUENT_CHECK; 3964 EV_FREQUENT_CHECK;
3715 3965
3716 clear_pending (EV_A_ (W)w); 3966 clear_pending (EV_A_ (W)w);
3740{ 3990{
3741 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3991 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3742} 3992}
3743 3993
3744#if EV_PERIODIC_ENABLE 3994#if EV_PERIODIC_ENABLE
3745void noinline 3995noinline
3996void
3746ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW 3997ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3747{ 3998{
3748 if (expect_false (ev_is_active (w))) 3999 if (expect_false (ev_is_active (w)))
3749 return; 4000 return;
3750 4001
3770 EV_FREQUENT_CHECK; 4021 EV_FREQUENT_CHECK;
3771 4022
3772 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4023 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3773} 4024}
3774 4025
3775void noinline 4026noinline
4027void
3776ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW 4028ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3777{ 4029{
3778 clear_pending (EV_A_ (W)w); 4030 clear_pending (EV_A_ (W)w);
3779 if (expect_false (!ev_is_active (w))) 4031 if (expect_false (!ev_is_active (w)))
3780 return; 4032 return;
3798 ev_stop (EV_A_ (W)w); 4050 ev_stop (EV_A_ (W)w);
3799 4051
3800 EV_FREQUENT_CHECK; 4052 EV_FREQUENT_CHECK;
3801} 4053}
3802 4054
3803void noinline 4055noinline
4056void
3804ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW 4057ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3805{ 4058{
3806 /* TODO: use adjustheap and recalculation */ 4059 /* TODO: use adjustheap and recalculation */
3807 ev_periodic_stop (EV_A_ w); 4060 ev_periodic_stop (EV_A_ w);
3808 ev_periodic_start (EV_A_ w); 4061 ev_periodic_start (EV_A_ w);
3813# define SA_RESTART 0 4066# define SA_RESTART 0
3814#endif 4067#endif
3815 4068
3816#if EV_SIGNAL_ENABLE 4069#if EV_SIGNAL_ENABLE
3817 4070
3818void noinline 4071noinline
4072void
3819ev_signal_start (EV_P_ ev_signal *w) EV_THROW 4073ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3820{ 4074{
3821 if (expect_false (ev_is_active (w))) 4075 if (expect_false (ev_is_active (w)))
3822 return; 4076 return;
3823 4077
3895 } 4149 }
3896 4150
3897 EV_FREQUENT_CHECK; 4151 EV_FREQUENT_CHECK;
3898} 4152}
3899 4153
3900void noinline 4154noinline
4155void
3901ev_signal_stop (EV_P_ ev_signal *w) EV_THROW 4156ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3902{ 4157{
3903 clear_pending (EV_A_ (W)w); 4158 clear_pending (EV_A_ (W)w);
3904 if (expect_false (!ev_is_active (w))) 4159 if (expect_false (!ev_is_active (w)))
3905 return; 4160 return;
3981 4236
3982#define DEF_STAT_INTERVAL 5.0074891 4237#define DEF_STAT_INTERVAL 5.0074891
3983#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4238#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3984#define MIN_STAT_INTERVAL 0.1074891 4239#define MIN_STAT_INTERVAL 0.1074891
3985 4240
3986static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4241noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3987 4242
3988#if EV_USE_INOTIFY 4243#if EV_USE_INOTIFY
3989 4244
3990/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4245/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4246# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3992 4247
3993static void noinline 4248noinline
4249static void
3994infy_add (EV_P_ ev_stat *w) 4250infy_add (EV_P_ ev_stat *w)
3995{ 4251{
3996 w->wd = inotify_add_watch (fs_fd, w->path, 4252 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY 4253 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO 4254 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4062 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4318 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4063 ev_timer_again (EV_A_ &w->timer); 4319 ev_timer_again (EV_A_ &w->timer);
4064 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4320 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4065} 4321}
4066 4322
4067static void noinline 4323noinline
4324static void
4068infy_del (EV_P_ ev_stat *w) 4325infy_del (EV_P_ ev_stat *w)
4069{ 4326{
4070 int slot; 4327 int slot;
4071 int wd = w->wd; 4328 int wd = w->wd;
4072 4329
4079 4336
4080 /* remove this watcher, if others are watching it, they will rearm */ 4337 /* remove this watcher, if others are watching it, they will rearm */
4081 inotify_rm_watch (fs_fd, wd); 4338 inotify_rm_watch (fs_fd, wd);
4082} 4339}
4083 4340
4084static void noinline 4341noinline
4342static void
4085infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4343infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4086{ 4344{
4087 if (slot < 0) 4345 if (slot < 0)
4088 /* overflow, need to check for all hash slots */ 4346 /* overflow, need to check for all hash slots */
4089 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4347 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4125 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4383 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4126 ofs += sizeof (struct inotify_event) + ev->len; 4384 ofs += sizeof (struct inotify_event) + ev->len;
4127 } 4385 }
4128} 4386}
4129 4387
4130inline_size void ecb_cold 4388inline_size ecb_cold
4389void
4131ev_check_2625 (EV_P) 4390ev_check_2625 (EV_P)
4132{ 4391{
4133 /* kernels < 2.6.25 are borked 4392 /* kernels < 2.6.25 are borked
4134 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4393 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4135 */ 4394 */
4233 w->attr.st_nlink = 0; 4492 w->attr.st_nlink = 0;
4234 else if (!w->attr.st_nlink) 4493 else if (!w->attr.st_nlink)
4235 w->attr.st_nlink = 1; 4494 w->attr.st_nlink = 1;
4236} 4495}
4237 4496
4238static void noinline 4497noinline
4498static void
4239stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4499stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4240{ 4500{
4241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4501 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4242 4502
4243 ev_statdata prev = w->attr; 4503 ev_statdata prev = w->attr;
4453 EV_FREQUENT_CHECK; 4713 EV_FREQUENT_CHECK;
4454} 4714}
4455#endif 4715#endif
4456 4716
4457#if EV_EMBED_ENABLE 4717#if EV_EMBED_ENABLE
4458void noinline 4718noinline
4719void
4459ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW 4720ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4460{ 4721{
4461 ev_run (w->other, EVRUN_NOWAIT); 4722 ev_run (w->other, EVRUN_NOWAIT);
4462} 4723}
4463 4724
4760} 5021}
4761 5022
4762/*****************************************************************************/ 5023/*****************************************************************************/
4763 5024
4764#if EV_WALK_ENABLE 5025#if EV_WALK_ENABLE
4765void ecb_cold 5026ecb_cold
5027void
4766ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW 5028ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4767{ 5029{
4768 int i, j; 5030 int i, j;
4769 ev_watcher_list *wl, *wn; 5031 ev_watcher_list *wl, *wn;
4770 5032

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