gnu/lib/libmalloc/getpagesize.h

   1 #include <sys/param.h>
   2 #ifdef BSD
   3 #ifndef BSD4_1
   4 #define HAVE_GETPAGESIZE
   5 #endif
   6 #endif
   7
   8 #ifndef HAVE_GETPAGESIZE
   9
  10 #ifdef VMS
  11 #define getpagesize() 512
  12 #endif
  13
  14 #ifdef HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17
  18 #ifdef _SC_PAGESIZE
  19 #define getpagesize() sysconf(_SC_PAGESIZE)
  20 #else
  21
  22 #include <sys/param.h>
  23
  24 #ifdef EXEC_PAGESIZE
  25 #define getpagesize() EXEC_PAGESIZE
  26 #else
  27 #ifdef NBPG
  28 #define getpagesize() NBPG * CLSIZE
  29 #ifndef CLSIZE
  30 #define CLSIZE 1
  31 #endif /* no CLSIZE */
  32 #else /* no NBPG */
  33 #define getpagesize() NBPC
  34 #endif /* no NBPG */
  35 #endif /* no EXEC_PAGESIZE */
  36 #endif /* no _SC_PAGESIZE */
  37
  38 #endif /* not HAVE_GETPAGESIZE */
  39