src/config.h

   1 /*
   2  * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  *   * Redistributions of source code must retain the above copyright notice,
   9  *     this list of conditions and the following disclaimer.
  10  *   * Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  *   * Neither the name of Redis nor the names of its contributors may be used
  14  *     to endorse or promote products derived from this software without
  15  *     specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef __CONFIG_H
  31 #define __CONFIG_H
  32
  33 #ifdef __APPLE__
  34 #include <AvailabilityMacros.h>
  35 #endif
  36
  37 /* Define redis_fstat to fstat or fstat64() */
  38 #if defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
  39 #define redis_fstat fstat64
  40 #define redis_stat stat64
  41 #else
  42 #define redis_fstat fstat
  43 #define redis_stat stat
  44 #endif
  45
  46 /* Test for proc filesystem */
  47 #ifdef __linux__
  48 #define HAVE_PROCFS 1
  49 #endif
  50
  51 /* Test for task_info() */
  52 #if defined(__APPLE__)
  53 #define HAVE_TASKINFO 1
  54 #endif
  55
  56 /* Test for backtrace() */
  57 #if defined(__APPLE__) || defined(__linux__) || defined(__sun)
  58 #define HAVE_BACKTRACE 1
  59 #endif
  60
  61 /* Test for polling API */
  62 #ifdef __linux__
  63 #define HAVE_EPOLL 1
  64 #endif
  65
  66 #if (defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined (__NetBSD__)
  67 #define HAVE_KQUEUE 1
  68 #endif
  69
  70 #ifdef __sun
  71 #include <sys/feature_tests.h>
  72 #ifdef _DTRACE_VERSION
  73 #define HAVE_EVPORT 1
  74 #endif
  75 #endif
  76
  77 /* Define aof_fsync to fdatasync() in Linux and fsync() for all the rest */
  78 #ifdef __linux__
  79 #define aof_fsync fdatasync
  80 #else
  81 #define aof_fsync fsync
  82 #endif
  83
  84 /* Define rdb_fsync_range to sync_file_range() on Linux, otherwise we use
  85  * the plain fsync() call. */
  86 #ifdef __linux__
  87 #include <linux/version.h>
  88 #include <features.h>
  89 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
  90 #if (LINUX_VERSION_CODE >= 0x020611 && __GLIBC_PREREQ(2, 6))
  91 #define HAVE_SYNC_FILE_RANGE 1
  92 #endif
  93 #else
  94 #if (LINUX_VERSION_CODE >= 0x020611)
  95 #define HAVE_SYNC_FILE_RANGE 1
  96 #endif
  97 #endif
  98 #endif
  99
 100 #ifdef HAVE_SYNC_FILE_RANGE
 101 #define rdb_fsync_range(fd,off,size) sync_file_range(fd,off,size,SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE)
 102 #else
 103 #define rdb_fsync_range(fd,off,size) fsync(fd)
 104 #endif
 105
 106 /* Byte ordering detection */
 107 #include <sys/types.h> /* This will likely define BYTE_ORDER */
 108
 109 #ifndef BYTE_ORDER
 110 #if (BSD >= 199103)
 111 # include <machine/endian.h>
 112 #else
 113 #if defined(linux) || defined(__linux__)
 114 # include <endian.h>
 115 #else
 116 #define LITTLE_ENDIAN   1234    /* least-significant byte first (vax, pc) */
 117 #define BIG_ENDIAN      4321    /* most-significant byte first (IBM, net) */
 118 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long (pdp)*/
 119
 120 #if defined(__i386__) || defined(__x86_64__) || defined(__amd64__) || \
 121    defined(vax) || defined(ns32000) || defined(sun386) || \
 122    defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \
 123    defined(__alpha__) || defined(__alpha)
 124 #define BYTE_ORDER    LITTLE_ENDIAN
 125 #endif
 126
 127 #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \
 128     defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \
 129     defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\
 130     defined(apollo) || defined(__convex__) || defined(_CRAY) || \
 131     defined(__hppa) || defined(__hp9000) || \
 132     defined(__hp9000s300) || defined(__hp9000s700) || \
 133     defined (BIT_ZERO_ON_LEFT) || defined(m68k) || defined(__sparc)
 134 #define BYTE_ORDER      BIG_ENDIAN
 135 #endif
 136 #endif /* linux */
 137 #endif /* BSD */
 138 #endif /* BYTE_ORDER */
 139
 140 /* Sometimes after including an OS-specific header that defines the
 141  * endianess we end with __BYTE_ORDER but not with BYTE_ORDER that is what
 142  * the Redis code uses. In this case let's define everything without the
 143  * underscores. */
 144 #ifndef BYTE_ORDER
 145 #ifdef __BYTE_ORDER
 146 #if defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN)
 147 #ifndef LITTLE_ENDIAN
 148 #define LITTLE_ENDIAN __LITTLE_ENDIAN
 149 #endif
 150 #ifndef BIG_ENDIAN
 151 #define BIG_ENDIAN __BIG_ENDIAN
 152 #endif
 153 #if (__BYTE_ORDER == __LITTLE_ENDIAN)
 154 #define BYTE_ORDER LITTLE_ENDIAN
 155 #else
 156 #define BYTE_ORDER BIG_ENDIAN
 157 #endif
 158 #endif
 159 #endif
 160 #endif
 161
 162 #if !defined(BYTE_ORDER) || \
 163     (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN)
 164         /* you must determine what the correct bit order is for
 165          * your compiler - the next line is an intentional error
 166          * which will force your compiles to bomb until you fix
 167          * the above macros.
 168          */
 169 #error "Undefined or invalid BYTE_ORDER"
 170 #endif
 171
 172 #if (__i386 || __amd64) && __GNUC__
 173 #define GNUC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
 174 #if GNUC_VERSION >= 40100
 175 #define HAVE_ATOMIC
 176 #endif
 177 #endif
 178
 179 #endif