Return to getpagesize.c CVS log

Up to [Apple XNU] / GNUtools / libg++ / libiberty

Annotation of GNUtools/libg++/libiberty/getpagesize.c, revision 1.1.1.1

1.1       root        1: /* Emulation of getpagesize() for systems that need it.
                      2:    Copyright (C) 1991 Free Software Foundation, Inc.
                      3: 
                      4: This file is part of the libiberty library.
                      5: Libiberty is free software; you can redistribute it and/or
                      6: modify it under the terms of the GNU Library General Public
                      7: License as published by the Free Software Foundation; either
                      8: version 2 of the License, or (at your option) any later version.
                      9: 
                     10: Libiberty is distributed in the hope that it will be useful,
                     11: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     13: Library General Public License for more details.
                     14: 
                     15: You should have received a copy of the GNU Library General Public
                     16: License along with libiberty; see the file COPYING.LIB.  If
                     17: not, write to the Free Software Foundation, Inc., 675 Mass Ave,
                     18: Cambridge, MA 02139, USA.  */
                     19: 
                     20: /*
                     21: 
                     22: NAME
                     23: 
                     24:        getpagesize -- return the number of bytes in page of memory
                     25: 
                     26: SYNOPSIS
                     27: 
                     28:        int getpagesize (void)
                     29: 
                     30: DESCRIPTION
                     31: 
                     32:        Returns the number of bytes in a page of memory.  This is the
                     33:        granularity of many of the system memory management routines.
                     34:        No guarantee is made as to whether or not it is the same as the
                     35:        basic memory management hardware page size.
                     36: 
                     37: BUGS
                     38: 
                     39:        Is intended as a reasonable replacement for systems where this
                     40:        is not provided as a system call.  The value of 4096 may or may
                     41:        not be correct for the systems where it is returned as the default
                     42:        value.
                     43: 
                     44: */
                     45: 
                     46: 
                     47: #include <sys/types.h>
                     48: #include <sys/param.h>
                     49: 
                     50: #ifdef HAVE_SYSCONF
                     51: #include <unistd.h>
                     52: #define GNU_OUR_PAGESIZE sysconf(_SC_PAGESIZE)
                     53: #else
                     54: #ifdef PAGESIZE
                     55: #define        GNU_OUR_PAGESIZE PAGESIZE
                     56: #else  /* no PAGESIZE */
                     57: #ifdef EXEC_PAGESIZE
                     58: #define        GNU_OUR_PAGESIZE EXEC_PAGESIZE
                     59: #else  /* no EXEC_PAGESIZE */
                     60: #ifdef NBPG
                     61: #define        GNU_OUR_PAGESIZE (NBPG * CLSIZE)
                     62: #ifndef        CLSIZE
                     63: #define        CLSIZE 1
                     64: #endif /* CLSIZE */
                     65: #else  /* no NBPG */
                     66: #ifdef NBPC
                     67: #define        GNU_OUR_PAGESIZE NBPC
                     68: #else  /* no NBPC */
                     69: #define        GNU_OUR_PAGESIZE 4096   /* Just punt and use reasonable value */
                     70: #endif /* NBPC */
                     71: #endif /* NBPG */
                     72: #endif /* EXEC_PAGESIZE */
                     73: #endif /* PAGESIZE */
                     74: #endif /* HAVE_SYSCONF */
                     75: 
                     76: int
                     77: getpagesize ()
                     78: {
                     79:   return (GNU_OUR_PAGESIZE);
                     80: }
                     81: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.