gnu/usr.bin/grep/getpagesize.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

/* Emulate getpagesize on systems that lack it.  */

/* $FreeBSD: src/gnu/usr.bin/grep/getpagesize.h,v 1.7.30.1.6.1 2010/12/21 17:09:25 kensmith Exp $ */

#ifndef HAVE_GETPAGESIZE

#if !defined getpagesize && defined __BEOS__
# include <OS.h>
# define getpagesize() B_PAGE_SIZE
#endif

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#if !defined getpagesize && defined _SC_PAGESIZE
# if !(defined VMS && __VMS_VER < 70000000)
#  define getpagesize() sysconf (_SC_PAGESIZE)
# endif
#endif

#if !defined getpagesize && defined VMS
# ifdef __ALPHA
#  define getpagesize() 8192
# else
#  define getpagesize() 512
# endif
#endif

#ifndef getpagesize
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
#  define getpagesize() EXEC_PAGESIZE
# else
#  ifdef NBPG
#   ifndef CLSIZE
#    define CLSIZE 1
#   endif
#   define getpagesize() (NBPG * CLSIZE)
#  else
#   ifdef NBPC
#    define getpagesize() NBPC
#   endif
#  endif
# endif
#endif

#endif /* not HAVE_GETPAGESIZE */