Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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14 years ago
/*
* libev event processing core, watcher management
*
* Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
14 years ago
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
14 years ago
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License ("GPL") version 2 or any later version,
* in which case the provisions of the GPL are applicable instead of
* the above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the BSD license, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file under
* either the BSD or the GPL.
14 years ago
*/
/* this big block deduces configuration from config.h */
#ifndef EV_STANDALONE
# ifdef EV_CONFIG_H
# include EV_CONFIG_H
# else
# include "config.h"
# endif
# if HAVE_FLOOR
# ifndef EV_USE_FLOOR
# define EV_USE_FLOOR 1
# endif
# endif
# if HAVE_CLOCK_SYSCALL
# ifndef EV_USE_CLOCK_SYSCALL
# define EV_USE_CLOCK_SYSCALL 1
# ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 0
# endif
# ifndef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 1
# endif
# endif
# elif !defined EV_USE_CLOCK_SYSCALL
# define EV_USE_CLOCK_SYSCALL 0
# endif
# if HAVE_CLOCK_GETTIME
# ifndef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 1
# endif
# ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 0
# endif
# else
# ifndef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 0
# endif
# ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 0
# endif
# endif
# if HAVE_NANOSLEEP
# ifndef EV_USE_NANOSLEEP
# define EV_USE_NANOSLEEP EV_FEATURE_OS
# endif
# else
# undef EV_USE_NANOSLEEP
# define EV_USE_NANOSLEEP 0
# endif
# if HAVE_SELECT && HAVE_SYS_SELECT_H
# ifndef EV_USE_SELECT
# define EV_USE_SELECT EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_SELECT
# define EV_USE_SELECT 0
# endif
# if HAVE_POLL && HAVE_POLL_H
# ifndef EV_USE_POLL
# define EV_USE_POLL EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_POLL
# define EV_USE_POLL 0
# endif
# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
# ifndef EV_USE_EPOLL
# define EV_USE_EPOLL EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_EPOLL
# define EV_USE_EPOLL 0
# endif
# if HAVE_LINUX_AIO_ABI_H
# ifndef EV_USE_LINUXAIO
# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_LINUXAIO
# define EV_USE_LINUXAIO 0
# endif
# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
# ifndef EV_USE_KQUEUE
# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_KQUEUE
# define EV_USE_KQUEUE 0
# endif
# if HAVE_PORT_H && HAVE_PORT_CREATE
# ifndef EV_USE_PORT
# define EV_USE_PORT EV_FEATURE_BACKENDS
# endif
# else
# undef EV_USE_PORT
# define EV_USE_PORT 0
# endif
# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
# ifndef EV_USE_INOTIFY
# define EV_USE_INOTIFY EV_FEATURE_OS
# endif
# else
# undef EV_USE_INOTIFY
# define EV_USE_INOTIFY 0
# endif
# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
# ifndef EV_USE_SIGNALFD
# define EV_USE_SIGNALFD EV_FEATURE_OS
# endif
# else
# undef EV_USE_SIGNALFD
# define EV_USE_SIGNALFD 0
# endif
# if HAVE_EVENTFD
# ifndef EV_USE_EVENTFD
# define EV_USE_EVENTFD EV_FEATURE_OS
# endif
# else
# undef EV_USE_EVENTFD
# define EV_USE_EVENTFD 0
# endif
#endif
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/* OS X, in its infinite idiocy, actually HARDCODES
* a limit of 1024 into their select. Where people have brains,
* OS X engineers apparently have a vacuum. Or maybe they were
* ordered to have a vacuum, or they do anything for money.
* This might help. Or not.
* Note that this must be defined early, as other include files
* will rely on this define as well.
*/
#define _DARWIN_UNLIMITED_SELECT 1
#include <stdlib.h>
#include <string.h>
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#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
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#include <assert.h>
#include <errno.h>
#include <sys/types.h>
#include <time.h>
#include <limits.h>
#include <signal.h>
#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif
#if EV_NO_THREADS
# undef EV_NO_SMP
# define EV_NO_SMP 1
# undef ECB_NO_THREADS
# define ECB_NO_THREADS 1
#endif
#if EV_NO_SMP
# undef EV_NO_SMP
# define ECB_NO_SMP 1
#endif
#ifndef _WIN32
# include <sys/time.h>
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# include <sys/wait.h>
# include <unistd.h>
#else
# include <io.h>
# define WIN32_LEAN_AND_MEAN
# include <winsock2.h>
# include <windows.h>
# ifndef EV_SELECT_IS_WINSOCKET
# define EV_SELECT_IS_WINSOCKET 1
# endif
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# undef EV_AVOID_STDIO
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#endif
/* this block tries to deduce configuration from header-defined symbols and defaults */
/* try to deduce the maximum number of signals on this platform */
#if defined EV_NSIG
/* use what's provided */
#elif defined NSIG
# define EV_NSIG (NSIG)
#elif defined _NSIG
# define EV_NSIG (_NSIG)
#elif defined SIGMAX
# define EV_NSIG (SIGMAX+1)
#elif defined SIG_MAX
# define EV_NSIG (SIG_MAX+1)
#elif defined _SIG_MAX
# define EV_NSIG (_SIG_MAX+1)
#elif defined MAXSIG
# define EV_NSIG (MAXSIG+1)
#elif defined MAX_SIG
# define EV_NSIG (MAX_SIG+1)
#elif defined SIGARRAYSIZE
# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
#elif defined _sys_nsig
# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
#else
# define EV_NSIG (8 * sizeof (sigset_t) + 1)
#endif
#ifndef EV_USE_FLOOR
# define EV_USE_FLOOR 0
#endif
#ifndef EV_USE_CLOCK_SYSCALL
# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
# else
# define EV_USE_CLOCK_SYSCALL 0
# endif
#endif
#if !(_POSIX_TIMERS > 0)
# ifndef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 0
# endif
# ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 0
# endif
#endif
#ifndef EV_USE_MONOTONIC
# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
# define EV_USE_MONOTONIC EV_FEATURE_OS
# else
# define EV_USE_MONOTONIC 0
# endif
#endif
#ifndef EV_USE_REALTIME
# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
#endif
#ifndef EV_USE_NANOSLEEP
# if _POSIX_C_SOURCE >= 199309L
# define EV_USE_NANOSLEEP EV_FEATURE_OS
# else
# define EV_USE_NANOSLEEP 0
# endif
#endif
#ifndef EV_USE_SELECT
# define EV_USE_SELECT EV_FEATURE_BACKENDS
#endif
#ifndef EV_USE_POLL
# ifdef _WIN32
# define EV_USE_POLL 0
# else
# define EV_USE_POLL EV_FEATURE_BACKENDS
# endif
#endif
#ifndef EV_USE_EPOLL
# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
# define EV_USE_EPOLL EV_FEATURE_BACKENDS
# else
# define EV_USE_EPOLL 0
# endif
#endif
#ifndef EV_USE_KQUEUE
# define EV_USE_KQUEUE 0
#endif
#ifndef EV_USE_PORT
# define EV_USE_PORT 0
#endif
#ifndef EV_USE_LINUXAIO
# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
# define EV_USE_LINUXAIO 1
# else
# define EV_USE_LINUXAIO 0
# endif
#endif
#ifndef EV_USE_IOURING
# if __linux
# define EV_USE_IOURING 0
# else
# define EV_USE_IOURING 0
# endif
#endif
#ifndef EV_USE_INOTIFY
# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
# define EV_USE_INOTIFY EV_FEATURE_OS
# else
# define EV_USE_INOTIFY 0
# endif
#endif
#ifndef EV_PID_HASHSIZE
# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
#endif
#ifndef EV_INOTIFY_HASHSIZE
# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
#endif
#ifndef EV_USE_EVENTFD
# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
# define EV_USE_EVENTFD EV_FEATURE_OS
# else
# define EV_USE_EVENTFD 0
# endif
#endif
#ifndef EV_USE_SIGNALFD
# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
# define EV_USE_SIGNALFD EV_FEATURE_OS
# else
# define EV_USE_SIGNALFD 0
# endif
#endif
#if 0 /* debugging */
# define EV_VERIFY 3
# define EV_USE_4HEAP 1
# define EV_HEAP_CACHE_AT 1
#endif
#ifndef EV_VERIFY
# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
#endif
#ifndef EV_USE_4HEAP
# define EV_USE_4HEAP EV_FEATURE_DATA
#endif
#ifndef EV_HEAP_CACHE_AT
# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
#endif
#ifdef __ANDROID__
/* supposedly, android doesn't typedef fd_mask */
# undef EV_USE_SELECT
# define EV_USE_SELECT 0
/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
# undef EV_USE_CLOCK_SYSCALL
# define EV_USE_CLOCK_SYSCALL 0
#endif
/* aix's poll.h seems to cause lots of trouble */
#ifdef _AIX
/* AIX has a completely broken poll.h header */
# undef EV_USE_POLL
# define EV_USE_POLL 0
#endif
/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
/* which makes programs even slower. might work on other unices, too. */
#if EV_USE_CLOCK_SYSCALL
# include <sys/syscall.h>
# ifdef SYS_clock_gettime
# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
# undef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 1
# define EV_NEED_SYSCALL 1
# else
# undef EV_USE_CLOCK_SYSCALL
# define EV_USE_CLOCK_SYSCALL 0
# endif
#endif
/* this block fixes any misconfiguration where we know we run into trouble otherwise */
#ifndef CLOCK_MONOTONIC
# undef EV_USE_MONOTONIC
# define EV_USE_MONOTONIC 0
#endif
#ifndef CLOCK_REALTIME
# undef EV_USE_REALTIME
# define EV_USE_REALTIME 0
#endif
#if !EV_STAT_ENABLE
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# undef EV_USE_INOTIFY
# define EV_USE_INOTIFY 0
#endif
#if !EV_USE_NANOSLEEP
/* hp-ux has it in sys/time.h, which we unconditionally include above */
# if !defined _WIN32 && !defined __hpux
# include <sys/select.h>
# endif
#endif
#if EV_USE_LINUXAIO
# include <sys/syscall.h>
# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
# define EV_NEED_SYSCALL 1
# else
# undef EV_USE_LINUXAIO
# define EV_USE_LINUXAIO 0
# endif
#endif
#if EV_USE_IOURING
# include <sys/syscall.h>
# if !SYS_io_uring_setup && __linux && !__alpha
# define SYS_io_uring_setup 425
# define SYS_io_uring_enter 426
# define SYS_io_uring_wregister 427
# endif
# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
# define EV_NEED_SYSCALL 1
# else
# undef EV_USE_IOURING
# define EV_USE_IOURING 0
# endif
#endif
#if EV_USE_INOTIFY
# include <sys/statfs.h>
# include <sys/inotify.h>
/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
# ifndef IN_DONT_FOLLOW
# undef EV_USE_INOTIFY
# define EV_USE_INOTIFY 0
# endif
#endif
#if EV_USE_EVENTFD
/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
# include <stdint.h>
# ifndef EFD_NONBLOCK
# define EFD_NONBLOCK O_NONBLOCK
# endif
# ifndef EFD_CLOEXEC
# ifdef O_CLOEXEC
# define EFD_CLOEXEC O_CLOEXEC
# else
# define EFD_CLOEXEC 02000000
# endif
# endif
EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
#endif
#if EV_USE_SIGNALFD
/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
# include <stdint.h>
# ifndef SFD_NONBLOCK
# define SFD_NONBLOCK O_NONBLOCK
# endif
# ifndef SFD_CLOEXEC
# ifdef O_CLOEXEC
# define SFD_CLOEXEC O_CLOEXEC
# else
# define SFD_CLOEXEC 02000000
# endif
# endif
EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
struct signalfd_siginfo
{
uint32_t ssi_signo;
char pad[128 - sizeof (uint32_t)];
};
#endif
/*****************************************************************************/
#if EV_VERIFY >= 3
# define EV_FREQUENT_CHECK ev_verify (EV_A)
#else
# define EV_FREQUENT_CHECK do { } while (0)
#endif
/*
* This is used to work around floating point rounding problems.
* This value is good at least till the year 4000.
*/
#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
/* find a portable timestamp that is "alawys" in the future but fits into time_t.
* this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
* and sizes large than 32 bit, but and maybe the unlikely loating point time_t */
#define EV_TSTAMP_HUGE \
(sizeof (time_t) >= 8 ? 10000000000000. \
: 0 < (time_t)4294967295 ? 4294967295. \
: 2147483647.) \
#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
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#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
/* ECB.H BEGIN */
/*
* libecb - http://software.schmorp.de/pkg/libecb
*
* Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
* Copyright (©) 2011 Emanuele Giaquinta
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License ("GPL") version 2 or any later version,
* in which case the provisions of the GPL are applicable instead of
* the above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the BSD license, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file under
* either the BSD or the GPL.
*/
#ifndef ECB_H
#define ECB_H
/* 16 bits major, 16 bits minor */
#define ECB_VERSION 0x00010006
#ifdef _WIN32
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
#if __GNUC__
typedef signed long long int64_t;
typedef unsigned long long uint64_t;
#else /* _MSC_VER || __BORLANDC__ */
typedef signed __int64 int64_t;
typedef unsigned __int64 uint64_t;
#endif
#ifdef _WIN64
#define ECB_PTRSIZE 8
typedef uint64_t uintptr_t;
typedef int64_t intptr_t;
#else
#define ECB_PTRSIZE 4
typedef uint32_t uintptr_t;
typedef int32_t intptr_t;
#endif
#else
#include <inttypes.h>
#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
#define ECB_PTRSIZE 8
#else
#define ECB_PTRSIZE 4
#endif
#endif
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#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
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/* work around x32 idiocy by defining proper macros */
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#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
#if _ILP32
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#define ECB_AMD64_X32 1
#else
#define ECB_AMD64 1
#endif
#endif
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/* many compilers define _GNUC_ to some versions but then only implement
* what their idiot authors think are the "more important" extensions,
* causing enormous grief in return for some better fake benchmark numbers.
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* or so.
* we try to detect these and simply assume they are not gcc - if they have
* an issue with that they should have done it right in the first place.
*/
#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
#define ECB_GCC_VERSION(major,minor) 0
#else
#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
#endif
#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
#if __clang__ && defined __has_builtin
#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
#else
#define ECB_CLANG_BUILTIN(x) 0
#endif
#if __clang__ && defined __has_extension
#define ECB_CLANG_EXTENSION(x) __has_extension (x)
#else
#define ECB_CLANG_EXTENSION(x) 0
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#endif
#define ECB_CPP (__cplusplus+0)
#define ECB_CPP11 (__cplusplus >= 201103L)
#define ECB_CPP14 (__cplusplus >= 201402L)
#define ECB_CPP17 (__cplusplus >= 201703L)
#if ECB_CPP
#define ECB_C 0
#define ECB_STDC_VERSION 0
#else
#define ECB_C 1
#define ECB_STDC_VERSION __STDC_VERSION__
#endif
#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
#if ECB_CPP
#define ECB_EXTERN_C extern "C"
#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
#define ECB_EXTERN_C_END }
#else
#define ECB_EXTERN_C extern
#define ECB_EXTERN_C_BEG
#define ECB_EXTERN_C_END
#endif
/*****************************************************************************/
/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
#if ECB_NO_THREADS
#define ECB_NO_SMP 1
#endif
#if ECB_NO_SMP
#define ECB_MEMORY_FENCE do { } while (0)
#endif
/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
#if __xlC__ && ECB_CPP
#include <builtins.h>
#endif
#if 1400 <= _MSC_VER
#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
#endif
#ifndef ECB_MEMORY_FENCE
#if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
#define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
#if __i386 || __i386__
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
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#elif ECB_GCC_AMD64
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
#elif defined __ARM_ARCH_2__ \
|| defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
|| defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
|| defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
|| defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \