1 /* Includes for memory limit warnings.
2 Copyright (C) 1990, 1993, 1994, 1995 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
24 /* Some systems need this before <sys/resource.h>. */
25 #include <sys/types.h>
29 #include <sys/resource.h>
30 #define BSD4_2 /* Tell code below to use getrlimit. */
32 /* Old Linux startup code won't define __data_start. */
33 extern int etext
, __data_start
; weak_symbol (__data_start
)
34 #define start_of_data() (&__data_start ?: &etext)
38 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha))
40 #include <sys/resource.h>
51 #include <sys/vlimit.h>
52 #endif /* not WINDOWSNT */
53 #endif /* not MSDOS */
57 #include <sys/resource.h>
61 /* The important properties of this type are that 1) it's a pointer, and
62 2) arithmetic on it should work as if the size of the object pointed
63 to has a size of 1. */
65 typedef void *POINTER
;
67 typedef char *POINTER
;
70 typedef unsigned long SIZE
;
75 #define NULL ((POINTER) 0)
77 extern POINTER
start_of_data ();
79 #define EXCEEDS_LISP_PTR(ptr) \
80 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
82 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
88 #define start_of_data() &etext
94 #define start_of_data() &etext
95 #endif /* not emacs */
97 #endif /* not _LIBC */
100 /* start of data space; can be changed by calling malloc_init */
101 static POINTER data_space_start
;
103 /* Number of bytes of writable memory we can expect to be able to get */
104 static unsigned int lim_data
;
112 #else /* not NO_LIM_DATA */
119 extern long ulimit ();
123 /* Use the ulimit call, if we seem to have it. */
124 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
125 lim_data
= ulimit (3, 0);
128 /* If that didn't work, just use the macro's value. */
129 #ifdef ULIMIT_BREAK_VALUE
131 lim_data
= ULIMIT_BREAK_VALUE
;
134 lim_data
-= (long) data_space_start
;
143 extern unsigned long data_region_size
;
144 lim_data
= data_region_size
;
148 #if !defined (BSD4_2) && !defined (__osf__)
154 _go32_dpmi_meminfo info
;
156 _go32_dpmi_get_free_memory_information (&info
);
157 lim_data
= info
.available_memory
;
159 #else /* not MSDOS */
163 lim_data
= vlimit (LIM_DATA
, -1);
165 #endif /* not MSDOS */
172 struct rlimit XXrlimit
;
174 getrlimit (RLIMIT_DATA
, &XXrlimit
);
176 lim_data
= XXrlimit
.rlim_cur
& RLIM_INFINITY
; /* soft limit */
178 lim_data
= XXrlimit
.rlim_cur
; /* soft limit */
182 #endif /* not WINDOWSNT */
184 #endif /* not NO_LIM_DATA */