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tag: libc-980504
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/* Includes for memory limit warnings.
Copyright (C) 1990, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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, or (at your option)
any later version.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef MSDOS
#include <dpmi.h>
#endif
/* Some systems need this before <sys/resource.h>. */
#include <sys/types.h>
#ifdef _LIBC
#include <sys/resource.h>
#define BSD4_2 /* Tell code below to use getrlimit. */
/* Old Linux startup code won't define __data_start. */
extern int etext, __data_start; weak_extern (__data_start)
#define start_of_data() (&__data_start ?: &etext)
#else /* not _LIBC */
#if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha))
#include <sys/time.h>
#include <sys/resource.h>
#endif
#ifdef __bsdi__
#define BSD4_2
#endif
#ifndef BSD4_2
#ifndef USG
#ifndef MSDOS
#ifndef WINDOWSNT
#include <sys/vlimit.h>
#endif /* not WINDOWSNT */
#endif /* not MSDOS */
#endif /* not USG */
#else /* if BSD4_2 */
#include <sys/time.h>
#include <sys/resource.h>
#endif /* BSD4_2 */
#ifdef emacs
/* The important properties of this type are that 1) it's a pointer, and
2) arithmetic on it should work as if the size of the object pointed
to has a size of 1. */
#ifdef __STDC__
typedef void *POINTER;
#else
typedef char *POINTER;
#endif
typedef unsigned long SIZE;
#ifdef NULL
#undef NULL
#endif
#define NULL ((POINTER) 0)
extern POINTER start_of_data ();
#ifdef DATA_SEG_BITS
#define EXCEEDS_LISP_PTR(ptr) \
(((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
#else
#define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
#endif
#ifdef BSD_SYSTEM
#ifndef DATA_SEG_BITS
extern char etext;
#define start_of_data() &etext
#endif
#endif
#else /* not emacs */
extern char etext;
#define start_of_data() &etext
#endif /* not emacs */
#endif /* not _LIBC */
/* start of data space; can be changed by calling malloc_init */
static POINTER data_space_start;
/* Number of bytes of writable memory we can expect to be able to get */
static unsigned long lim_data;
#ifdef NO_LIM_DATA
static void
get_lim_data ()
{
lim_data = -1;
}
#else /* not NO_LIM_DATA */
#ifdef USG
static void
get_lim_data ()
{
extern long ulimit ();
lim_data = -1;
/* Use the ulimit call, if we seem to have it. */
#if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
lim_data = ulimit (3, 0);
#endif
/* If that didn't work, just use the macro's value. */
#ifdef ULIMIT_BREAK_VALUE
if (lim_data == -1)
lim_data = ULIMIT_BREAK_VALUE;
#endif
lim_data -= (long) data_space_start;
}
#else /* not USG */
#ifdef WINDOWSNT
static void
get_lim_data ()
{
extern unsigned long data_region_size;
lim_data = data_region_size;
}
#else
#if !defined (BSD4_2) && !defined (__osf__)
#ifdef MSDOS
void
get_lim_data ()
{
_go32_dpmi_meminfo info;
_go32_dpmi_get_free_memory_information (&info);
lim_data = info.available_memory;
}
#else /* not MSDOS */
static void
get_lim_data ()
{
lim_data = vlimit (LIM_DATA, -1);
}
#endif /* not MSDOS */
#else /* BSD4_2 */
static void
get_lim_data ()
{
struct rlimit XXrlimit;
getrlimit (RLIMIT_DATA, &XXrlimit);
#ifdef RLIM_INFINITY
lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
#else
lim_data = XXrlimit.rlim_cur; /* soft limit */
#endif
}
#endif /* BSD4_2 */
#endif /* not WINDOWSNT */
#endif /* not USG */
#endif /* not NO_LIM_DATA */
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