ceph/src/include/compat.h

   1 /*
   2  * Ceph - scalable distributed file system
   3  *
   4  * Copyright (C) 2011 Stanislav Sedov <stas@FreeBSD.org>
   5  *
   6  * This is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License version 2.1, as published by the Free Software
   9  * Foundation.  See file COPYING.
  10  */
  11
  12 #ifndef CEPH_COMPAT_H
  13 #define CEPH_COMPAT_H
  14
  15 #include "acconfig.h"
  16 #include <sys/types.h>
  17
  18 #if defined(__linux__)
  19 #define PROCPREFIX
  20 #endif
  21
  22 #if defined(__FreeBSD__)
  23
  24 // FreeBSD supports Linux procfs with its compatibility module
  25 // And all compatibility stuff is standard mounted on this
  26 #define PROCPREFIX "/compat/linux"
  27
  28 /* Make sure that ENODATA is defined in the correct way */
  29 #ifndef ENODATA
  30 #define ENODATA ENOATTR
  31 #else
  32 #if (ENODATA == 9919)
  33 // #warning ENODATA already defined to be 9919, redefining to fix
  34 // Silencing this warning because it fires at all files where compat.h
  35 // is included after boost files.
  36 //
  37 // This value stems from the definition in the boost library
  38 // And when this case occurs it is due to the fact that boost files
  39 // are included before this file. Redefinition might not help in this
  40 // case since already parsed code has evaluated to the wrong value.
  41 // This would warrrant for d definition that would actually be evaluated
  42 // at the location of usage and report a possible confict.
  43 // This is left up to a future improvement
  44 #elif (ENODATA != 87)
  45 #warning ENODATA already defined to a value different from 87 (ENOATRR), refining to fix
  46 #endif
  47 #undef ENODATA
  48 #define ENODATA ENOATTR
  49 #endif
  50 #ifndef MSG_MORE
  51 #define MSG_MORE 0
  52 #endif
  53
  54 #ifndef O_DSYNC
  55 #define O_DSYNC O_SYNC
  56 #endif
  57
  58 // Fix clock accuracy
  59 #if !defined(CLOCK_MONOTONIC_COARSE)
  60 #if defined(CLOCK_MONOTONIC_FAST)
  61 #define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_FAST
  62 #else
  63 #define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
  64 #endif
  65 #endif
  66 #if !defined(CLOCK_REALTIME_COARSE)
  67 #if defined(CLOCK_REALTIME_FAST)
  68 #define CLOCK_REALTIME_COARSE CLOCK_REALTIME_FAST
  69 #else
  70 #define CLOCK_REALTIME_COARSE CLOCK_REALTIME
  71 #endif
  72 #endif
  73
  74 /* And include the extra required include file */
  75 #include <pthread_np.h>
  76
  77 #endif /* !__FreeBSD__ */
  78
  79 #if defined(__APPLE__) || defined(__FreeBSD__)
  80 /* get PATH_MAX */
  81 #include <limits.h>
  82
  83 #ifndef EREMOTEIO
  84 #define EREMOTEIO 121
  85 #endif
  86
  87 #ifndef HOST_NAME_MAX
  88 #ifdef MAXHOSTNAMELEN
  89 #define HOST_NAME_MAX MAXHOSTNAMELEN
  90 #else
  91 #define HOST_NAME_MAX 255
  92 #endif
  93 #endif
  94
  95 #endif /* __APPLE__ */
  96
  97 /* O_LARGEFILE is not defined/required on OSX/FreeBSD */
  98 #ifndef O_LARGEFILE
  99 #define O_LARGEFILE 0
 100 #endif
 101
 102 /* Could be relevant for other platforms */
 103 #ifndef ERESTART
 104 #define ERESTART EINTR
 105 #endif
 106
 107 #ifndef TEMP_FAILURE_RETRY
 108 #define TEMP_FAILURE_RETRY(expression) ({     \
 109   __typeof(expression) __result;              \
 110   do {                                        \
 111     __result = (expression);                  \
 112   } while (__result == -1 && errno == EINTR); \
 113   __result; })
 114 #endif
 115
 116 #ifdef __cplusplus
 117 # define VOID_TEMP_FAILURE_RETRY(expression) \
 118    static_cast<void>(TEMP_FAILURE_RETRY(expression))
 119 #else
 120 # define VOID_TEMP_FAILURE_RETRY(expression) \
 121    do { (void)TEMP_FAILURE_RETRY(expression); } while (0)
 122 #endif
 123
 124 #if defined(__FreeBSD__) || defined(__APPLE__)
 125 #define lseek64(fd, offset, whence) lseek(fd, offset, whence)
 126 #endif
 127
 128 #if defined(__sun) || defined(_AIX)
 129 #define LOG_AUTHPRIV    (10<<3)
 130 #define LOG_FTP         (11<<3)
 131 #define __STRING(x)     "x"
 132 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 133 #endif
 134
 135 #if defined(_AIX)
 136 #define MSG_DONTWAIT MSG_NONBLOCK
 137 #endif
 138
 139 #if defined(HAVE_PTHREAD_SETNAME_NP)
 140   #if defined(__APPLE__)
 141     #define ceph_pthread_setname(thread, name) ({ \
 142       int __result = 0;                         \
 143       if (thread == pthread_self())             \
 144         __result = pthread_setname_np(name);    \
 145       __result; })
 146   #else
 147     #define ceph_pthread_setname pthread_setname_np
 148   #endif
 149 #elif defined(HAVE_PTHREAD_SET_NAME_NP)
 150   /* Fix a small name diff */
 151   #define ceph_pthread_setname pthread_set_name_np
 152 #else
 153   /* compiler warning free success noop */
 154   #define ceph_pthread_setname(thread, name) ({ \
 155     int __i = 0;                              \
 156     __i; })
 157 #endif
 158
 159 #if defined(HAVE_PTHREAD_GETNAME_NP)
 160   #define ceph_pthread_getname pthread_getname_np
 161 #else
 162   /* compiler warning free success noop */
 163   #define ceph_pthread_getname(thread, name, len) ({ \
 164     if (name != NULL)                              \
 165       *name = '\0';                                \
 166     0; })
 167 #endif
 168
 169 int ceph_posix_fallocate(int fd, off_t offset, off_t len);
 170
 171 #endif /* !CEPH_COMPAT_H */