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changeset 2277:4f8e53972eed

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adapted from changes to grep getpagesize.h by Martin P.J. Zinser <zinser@decus.de>.
author Jim Meyering <jim@meyering.net>
date Mon, 14 Feb 2000 20:15:32 +0000
parents 90fc17cfc883
children 5d55f28e5846
files lib/getpagesize.h
diffstat 1 files changed, 31 insertions(+), 25 deletions(-) [+]
line wrap: on
line diff
--- a/lib/getpagesize.h
+++ b/lib/getpagesize.h
@@ -2,34 +2,40 @@
 
 #ifndef HAVE_GETPAGESIZE
 
-#ifdef VMS
-#define getpagesize() 512
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
 #endif
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
+#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
 
-#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 */
+#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 */