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