diff options
Diffstat (limited to 'lib/malloclib/getpagesize.h')
-rw-r--r-- | lib/malloclib/getpagesize.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/malloclib/getpagesize.h b/lib/malloclib/getpagesize.h new file mode 100644 index 0000000..b3aa4ba --- /dev/null +++ b/lib/malloclib/getpagesize.h @@ -0,0 +1,56 @@ +/* Emulation of getpagesize() for systems that need it. + Copyright (C) 1991 Free Software Foundation, Inc. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#if !defined (USG) +extern size_t getpagesize __P ((void)); +# if !defined (HAVE_GETPAGESIZE) +# define HAVE_GETPAGESIZE +# endif /* !HAVE_GETPAGESIZE */ +#endif /* !USG */ + +#if !defined (HAVE_GETPAGESIZE) && defined (HAVE_UNISTD_H) +# include <unistd.h> +# if defined (_SC_PAGESIZE) +# define getpagesize() sysconf(_SC_PAGESIZE) +# endif /* _SC_PAGESIZE */ +#endif + +#if !defined (HAVE_GETPAGESIZE) +# include <sys/param.h> +# if defined (PAGESIZE) +# define getpagesize() PAGESIZE +# else /* !PAGESIZE */ +# if defined (EXEC_PAGESIZE) +# define getpagesize() EXEC_PAGESIZE +# else /* !EXEC_PAGESIZE */ +# if defined (NBPG) +# if !defined (CLSIZE) +# define CLSIZE 1 +# endif /* !CLSIZE */ +# define getpagesize() (NBPG * CLSIZE) +# else /* !NBPG */ +# if defined (NBPC) +# define getpagesize() NBPC +# endif /* NBPC */ +# endif /* !NBPG */ +# endif /* !EXEC_PAGESIZE */ +# endif /* !PAGESIZE */ +#endif /* !getpagesize */ + +#if !defined (HAVE_GETPAGESIZE) && !defined (getpagesize) +# define getpagesize() 4096 /* Just punt and use reasonable value */ +#endif /* !HAVE_GETPAGESIZE && !getpagesize */ |