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 #ifdef __linux__ 38 #include <linux/version.h> 39 #include <features.h> 40 #endif 41 42 /* Define redis_fstat to fstat or fstat64() */ 43 #if defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6) 44 #define redis_fstat fstat64 45 #define redis_stat stat64 46 #else 47 #define redis_fstat fstat 48 #define redis_stat stat 49 #endif 50 51 /* Test for proc filesystem */ 52 #ifdef __linux__ 53 #define HAVE_PROC_STAT 1 54 #define HAVE_PROC_MAPS 1 55 #define HAVE_PROC_SMAPS 1 56 #define HAVE_PROC_SOMAXCONN 1 57 #endif 58 59 /* Test for task_info() */ 60 #if defined(__APPLE__) 61 #define HAVE_TASKINFO 1 62 #endif 63 64 /* Test for backtrace() */ 65 #if defined(__APPLE__) || (defined(__linux__) && defined(__GLIBC__)) || \ 66 defined(__FreeBSD__) || (defined(__OpenBSD__) && defined(USE_BACKTRACE))\ 67 || defined(__DragonFly__) 68 #define HAVE_BACKTRACE 1 69 #endif 70 71 /* MSG_NOSIGNAL. */ 72 #ifdef __linux__ 73 #define HAVE_MSG_NOSIGNAL 1 74 #endif 75 76 /* Test for polling API */ 77 #ifdef __linux__ 78 #define HAVE_EPOLL 1 79 #endif 80 81 #if (defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined (__NetBSD__) 82 #define HAVE_KQUEUE 1 83 #endif 84 85 #ifdef __sun 86 #include <sys/feature_tests.h> 87 #ifdef _DTRACE_VERSION 88 #define HAVE_EVPORT 1 89 #endif 90 #endif 91 92 /* Define redis_fsync to fdatasync() in Linux and fsync() for all the rest */ 93 #ifdef __linux__ 94 #define redis_fsync fdatasync 95 #else 96 #define redis_fsync fsync 97 #endif 98 99 /* Define rdb_fsync_range to sync_file_range() on Linux, otherwise we use 100 * the plain fsync() call. */ 101 #ifdef __linux__ 102 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ) 103 #if (LINUX_VERSION_CODE >= 0x020611 && __GLIBC_PREREQ(2, 6)) 104 #define HAVE_SYNC_FILE_RANGE 1 105 #endif 106 #else 107 #if (LINUX_VERSION_CODE >= 0x020611) 108 #define HAVE_SYNC_FILE_RANGE 1 109 #endif 110 #endif 111 #endif 112 113 #ifdef HAVE_SYNC_FILE_RANGE 114 #define rdb_fsync_range(fd,off,size) sync_file_range(fd,off,size,SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE) 115 #else 116 #define rdb_fsync_range(fd,off,size) fsync(fd) 117 #endif 118 119 /* Check if we can use setproctitle(). 120 * BSD systems have support for it, we provide an implementation for 121 * Linux and osx. */ 122 #if (defined __NetBSD__ || defined __FreeBSD__ || defined __OpenBSD__) 123 #define USE_SETPROCTITLE 124 #endif 125 126 #ifndef HAVE_FF_KQUEUE 127 #if ((defined __linux && defined(__GLIBC__)) || defined __APPLE__) 128 #define USE_SETPROCTITLE 129 #define INIT_SETPROCTITLE_REPLACEMENT 130 void spt_init(int argc, char *argv[]); 131 void setproctitle(const char *fmt, ...); 132 #endif 133 #endif 134 135 /* Byte ordering detection */ 136 #include <sys/types.h> /* This will likely define BYTE_ORDER */ 137 138 #ifndef BYTE_ORDER 139 #if (BSD >= 199103) 140 # include <machine/endian.h> 141 #else 142 #if defined(linux) || defined(__linux__) 143 # include <endian.h> 144 #else 145 #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */ 146 #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ 147 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp)*/ 148 149 #if defined(__i386__) || defined(__x86_64__) || defined(__amd64__) || \ 150 defined(vax) || defined(ns32000) || defined(sun386) || \ 151 defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \ 152 defined(__alpha__) || defined(__alpha) 153 #define BYTE_ORDER LITTLE_ENDIAN 154 #endif 155 156 #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \ 157 defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \ 158 defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\ 159 defined(apollo) || defined(__convex__) || defined(_CRAY) || \ 160 defined(__hppa) || defined(__hp9000) || \ 161 defined(__hp9000s300) || defined(__hp9000s700) || \ 162 defined (BIT_ZERO_ON_LEFT) || defined(m68k) || defined(__sparc) 163 #define BYTE_ORDER BIG_ENDIAN 164 #endif 165 #endif /* linux */ 166 #endif /* BSD */ 167 #endif /* BYTE_ORDER */ 168 169 /* Sometimes after including an OS-specific header that defines the 170 * endianess we end with __BYTE_ORDER but not with BYTE_ORDER that is what 171 * the Redis code uses. In this case let's define everything without the 172 * underscores. */ 173 #ifndef BYTE_ORDER 174 #ifdef __BYTE_ORDER 175 #if defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) 176 #ifndef LITTLE_ENDIAN 177 #define LITTLE_ENDIAN __LITTLE_ENDIAN 178 #endif 179 #ifndef BIG_ENDIAN 180 #define BIG_ENDIAN __BIG_ENDIAN 181 #endif 182 #if (__BYTE_ORDER == __LITTLE_ENDIAN) 183 #define BYTE_ORDER LITTLE_ENDIAN 184 #else 185 #define BYTE_ORDER BIG_ENDIAN 186 #endif 187 #endif 188 #endif 189 #endif 190 191 #if !defined(BYTE_ORDER) || \ 192 (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN) 193 /* you must determine what the correct bit order is for 194 * your compiler - the next line is an intentional error 195 * which will force your compiles to bomb until you fix 196 * the above macros. 197 */ 198 #error "Undefined or invalid BYTE_ORDER" 199 #endif 200 201 #if (__i386 || __amd64 || __powerpc__) && __GNUC__ 202 #define GNUC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) 203 #if defined(__clang__) 204 #define HAVE_ATOMIC 205 #endif 206 #if (defined(__GLIBC__) && defined(__GLIBC_PREREQ)) 207 #if (GNUC_VERSION >= 40100 && __GLIBC_PREREQ(2, 6)) 208 #define HAVE_ATOMIC 209 #endif 210 #endif 211 #endif 212 213 /* Make sure we can test for ARM just checking for __arm__, since sometimes 214 * __arm is defined but __arm__ is not. */ 215 #if defined(__arm) && !defined(__arm__) 216 #define __arm__ 217 #endif 218 #if defined (__aarch64__) && !defined(__arm64__) 219 #define __arm64__ 220 #endif 221 222 /* Make sure we can test for SPARC just checking for __sparc__. */ 223 #if defined(__sparc) && !defined(__sparc__) 224 #define __sparc__ 225 #endif 226 227 #if defined(__sparc__) || defined(__arm__) 228 #define USE_ALIGNED_ACCESS 229 #endif 230 231 #endif 232