65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* Allocate memory on a page boundary.
|
|
Copyright (C) 1991, 1992 Free Software Foundation, Inc.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with this library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA.
|
|
|
|
The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
or (US mail) as Mike Haertel c/o Free Software Foundation. */
|
|
|
|
#ifndef _MALLOC_INTERNAL
|
|
#define _MALLOC_INTERNAL
|
|
#include <malloc.h>
|
|
#endif
|
|
|
|
#ifdef emacs
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#ifdef __GNU_LIBRARY__
|
|
extern size_t __getpagesize __P ((void));
|
|
#else
|
|
#ifndef USG
|
|
extern size_t getpagesize __P ((void));
|
|
#define __getpagesize() getpagesize()
|
|
#else
|
|
#include <sys/param.h>
|
|
#ifdef EXEC_PAGESIZE
|
|
#define __getpagesize() EXEC_PAGESIZE
|
|
#else /* No EXEC_PAGESIZE. */
|
|
#ifdef NBPG
|
|
#ifndef CLSIZE
|
|
#define CLSIZE 1
|
|
#endif /* No CLSIZE. */
|
|
#define __getpagesize() (NBPG * CLSIZE)
|
|
#else /* No NBPG. */
|
|
#define __getpagesize() NBPC
|
|
#endif /* NBPG. */
|
|
#endif /* EXEC_PAGESIZE. */
|
|
#endif /* USG. */
|
|
#endif
|
|
|
|
static size_t pagesize;
|
|
|
|
__ptr_t
|
|
valloc (size)
|
|
size_t size;
|
|
{
|
|
if (pagesize == 0)
|
|
pagesize = __getpagesize ();
|
|
|
|
return memalign (pagesize, size);
|
|
}
|