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| author | Roland McGrath <roland@gnu.org> | 1993-07-30 22:30:50 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1993-07-30 22:30:50 +0000 |
| commit | d964495c3aeb21cbafaff05db0c079f8b41ea766 (patch) | |
| tree | e6fd41f0ac4ad77c88b6ed70bf907d0cb392850c /src/getpagesize.h | |
| parent | 108b2b07100e1948b85fcaf6466957a2683eb8b5 (diff) | |
| download | emacs-d964495c3aeb21cbafaff05db0c079f8b41ea766.tar.gz | |
Initial revision
Diffstat (limited to 'src/getpagesize.h')
| -rw-r--r-- | src/getpagesize.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/getpagesize.h b/src/getpagesize.h new file mode 100644 index 00000000000..4e513c31ade --- /dev/null +++ b/src/getpagesize.h @@ -0,0 +1,35 @@ +/* Emulate getpagesize on systems that lack it. */ + +#ifndef HAVE_GETPAGESIZE + +#ifdef VMS +#define getpagesize() 512 +#endif + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#ifdef _SC_PAGESIZE +#define getpagesize() sysconf(_SC_PAGESIZE) +#else + +#include <sys/param.h> + +#ifdef EXEC_PAGESIZE +#define getpagesize() EXEC_PAGESIZE +#else +#ifdef NBPG +#define getpagesize() NBPG * CLSIZE +#ifndef CLSIZE +#define CLSIZE 1 +#endif /* no CLSIZE */ +#else /* no NBPG */ +#ifdef NBPC +#define getpagesize() NBPC +#endif /* NBPC */ +#endif /* no NBPG */ +#endif /* no EXEC_PAGESIZE */ +#endif /* no _SC_PAGESIZE */ + +#endif /* not HAVE_GETPAGESIZE */ |