1 /* Includes for memory limit warnings.
2 Copyright (C) 1990, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: FSF 19.30. */
23 /* #### This ancient code really sucks.
24 configure should check for:
25 HAVE_SYS_RESOURCE_H, HAVE_ULIMIT_H, HAVE_GETRLIMIT, HAVE_ULIMIT,
26 and select action based on those values.
27 getrlimit() should be preferred to ulimit().
28 On Linux, ulimit() is deprecated and always returns -1. */
30 #ifndef _XEMACS_MEM_LIMITS_H_
31 #define _XEMACS_MEM_LIMITS_H_
45 /* Some systems need this before <sys/resource.h>. */
46 #include <sys/types.h>
50 #include <sys/resource.h>
51 #define BSD4_2 /* Tell code below to use getrlimit. */
53 /* Old Linux startup code won't define __data_start. */
54 extern int etext, __data_start; weak_symbol (__data_start)
55 #define start_of_data() (&__data_start ?: &etext)
57 #else /* not GNU libc */
59 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
61 #include <sys/resource.h>
64 #if defined(__bsdi__) || defined(__NetBSD__) || defined(__linux__) || defined(__OpenBSD__)
65 #if defined(__linux__) && defined (powerpc) /*Added by Fukui*/
66 #else /*Added by Fukui*/
68 #endif /*Added by Fukui*/
76 #if defined(__linux__) && defined(powerpc) /*Added Kaoru Fukui*/
77 #else /*Added Kaoru Fukui*/
78 #include <sys/vlimit.h>
79 #endif /*Added by Fukui*/
80 #endif /* not __CYGWIN32__ */
81 #endif /* not WINDOWSNT */
82 #endif /* not MSDOS */
86 #include <sys/resource.h>
90 /* The important properties of this type are that 1) it's a pointer, and
91 2) arithmetic on it should work as if the size of the object pointed
92 to has a size of 1. */
94 typedef void *POINTER;
96 typedef char *POINTER;
100 typedef unsigned long SIZE;
103 extern POINTER start_of_data ();
105 #define EXCEEDS_LISP_PTR(ptr) \
106 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
108 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
112 #ifndef DATA_SEG_BITS
114 #define start_of_data() &etext
118 #else /* not emacs */
120 #define start_of_data() &etext
121 #endif /* not emacs */
123 #endif /* not _LIBC */
127 /* start of data space; can be changed by calling malloc_init */
128 static POINTER data_space_start;
130 /* Number of bytes of writable memory we can expect to be able to get */
131 extern unsigned int lim_data;
134 extern unsigned long static_heap_size;
135 extern int initialized;
141 lim_data = (unsigned int) -1; /* static_heap_size; */
145 lim_data = (unsigned int) -1;
153 lim_data = (unsigned int) -1;
155 #else /* not NO_LIM_DATA */
162 lim_data = (unsigned int) -1;
164 /* Use the ulimit call, if we seem to have it. */
165 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
166 lim_data = ulimit (3, 0);
169 /* If that didn't work, just use the macro's value. */
170 #ifdef ULIMIT_BREAK_VALUE
171 if (lim_data == (unsigned int) -1)
172 lim_data = ULIMIT_BREAK_VALUE;
175 lim_data -= (long) data_space_start;
179 #if defined( WINDOWSNT )
184 extern unsigned long data_region_size;
185 lim_data = data_region_size;
189 #if !defined (BSD4_2) && !defined (__osf__)
195 _go32_dpmi_meminfo info;
197 _go32_dpmi_get_free_memory_information (&info);
198 lim_data = info.available_memory;
200 #else /* not MSDOS */
204 lim_data = vlimit (LIM_DATA, -1);
206 #endif /* not MSDOS */
213 struct rlimit XXrlimit;
215 getrlimit (RLIMIT_DATA, &XXrlimit);
217 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
219 lim_data = XXrlimit.rlim_cur; /* soft limit */
223 #endif /* not WINDOWSNT */
225 #endif /* not NO_LIM_DATA */
226 #endif /* not HEAP_IN_DATA */
228 #endif /* _XEMACS_MEM_LIMITS_H_ */