librhcm/platform.h

   1 /*
   2   Copyright Red Hat, Inc. 2002-2003
   3
   4   The Red Hat Cluster Manager API Library is free software; you can
   5   redistribute it and/or modify it under the terms of the GNU Lesser
   6   General Public License as published by the Free Software Foundation;
   7   either version 2.1 of the License, or (at your option) any later
   8   version.
   9
  10   The Red Hat Cluster Manager API Library is distributed in the hope
  11   that it will be useful, but WITHOUT ANY WARRANTY; without even the
  12   implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13   PURPOSE.  See the GNU Lesser General Public License for more details.
  14
  15   You should have received a copy of the GNU Lesser General Public
  16   License along with this library; if not, write to the Free Software
  17   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18   USA.
  19  */
  20 /** @file
  21  * Defines for byte-swapping
  22  */
  23 #ifndef __PLATFORM_H
  24 #define __PLATFORM_H
  25
  26 #include <endian.h>
  27 #include <sys/param.h>
  28 #include <byteswap.h>
  29 #include <bits/wordsize.h>
  30 #include <sizes.h>
  31
  32 /* No swapping on little-endian machines */
  33 #if __BYTE_ORDER == __LITTLE_ENDIAN
  34 #define le_swap16(x) (x)
  35 #define le_swap32(x) (x)
  36 #define le_swap64(x) (x)
  37 #else
  38 #define le_swap16(x) bswap_16(x)
  39 #define le_swap32(x) bswap_32(x)
  40 #define le_swap64(x) bswap_64(x)
  41 #endif
  42
  43 /* No swapping on big-endian machines */
  44 #if __BYTE_ORDER == __LITTLE_ENDIAN
  45 #define be_swap16(x) bswap_16(x)
  46 #define be_swap32(x) bswap_32(x)
  47 #define be_swap64(x) bswap_64(x)
  48 #else
  49 #define be_swap16(x) (x)
  50 #define be_swap32(x) (x)
  51 #define be_swap64(x) (x)
  52 #endif
  53
  54
  55 #define swab16(x) x=be_swap16(x)
  56 #define swab32(x) x=be_swap32(x)
  57 #define swab64(x) x=be_swap64(x)
  58
  59
  60 #if __PTR_SIZE == 4
  61 #define ptrcast_uint64_t(ptr)   ((uint64_t)((uint32_t)ptr))
  62 #else
  63 #if __PTR_SIZE == 8
  64 #define ptrcast_uint64_t(ptr)   ((uint64_t)ptr)
  65 #else
  66 #error "Unsupported architecture!"
  67 #endif
  68 #endif
  69
  70
  71 #endif /* __PLATFORM_H */