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comparison src/mem-limits.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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children 8de8e3f6228a
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427:0a0253eac470 428:3ecd8885ac67
1 /* Includes for memory limit warnings.
2 Copyright (C) 1990, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
3
4 This file is part of XEmacs.
5
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
9 later version.
10
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
14 for more details.
15
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. */
20
21 /* Synched up with: FSF 19.30. */
22
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. */
29
30 #ifndef _XEMACS_MEM_LIMITS_H_
31 #define _XEMACS_MEM_LIMITS_H_
32
33 #ifdef HAVE_CONFIG_H
34 #include <config.h>
35 #endif
36
37 #ifdef HAVE_ULIMIT_H
38 #include <ulimit.h>
39 #endif
40
41 #ifdef MSDOS
42 #include <dpmi.h>
43 #endif
44
45 /* Some systems need this before <sys/resource.h>. */
46 #include <sys/types.h>
47
48 #ifdef _LIBC
49
50 #include <sys/resource.h>
51 #define BSD4_2 /* Tell code below to use getrlimit. */
52
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)
56
57 #else /* not GNU libc */
58
59 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
60 #include <sys/time.h>
61 #include <sys/resource.h>
62 #endif
63
64 #if defined(__bsdi__) || defined(__NetBSD__) || defined(__linux__) || defined(__OpenBSD__)
65 #if defined(__linux__) && defined (powerpc) /*Added by Fukui*/
66 #else /*Added by Fukui*/
67 #define BSD4_2
68 #endif /*Added by Fukui*/
69 #endif
70
71 #ifndef BSD4_2
72 #ifndef USG
73 #ifndef MSDOS
74 #ifndef WINDOWSNT
75 #ifndef __CYGWIN32__
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 */
83 #endif /* not USG */
84 #else /* if BSD4_2 */
85 #include <sys/time.h>
86 #include <sys/resource.h>
87 #endif /* BSD4_2 */
88
89 #ifdef emacs
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. */
93 #ifdef __STDC__
94 typedef void *POINTER;
95 #else
96 typedef char *POINTER;
97 #endif
98
99 #ifndef __CYGWIN32__
100 typedef unsigned long SIZE;
101 #endif
102
103 extern POINTER start_of_data (void);
104 #define EXCEEDS_LISP_PTR(ptr) 0
105
106 #ifdef BSD
107 #ifndef DATA_SEG_BITS
108 extern int etext;
109 #define start_of_data() &etext
110 #endif
111 #endif
112
113 #else /* not emacs */
114 extern char etext;
115 #define start_of_data() &etext
116 #endif /* not emacs */
117
118 #endif /* not _LIBC */
119
120
121
122 /* start of data space; can be changed by calling malloc_init */
123 static POINTER data_space_start;
124
125 /* Number of bytes of writable memory we can expect to be able to get */
126 extern unsigned int lim_data;
127
128 #ifdef HEAP_IN_DATA
129 extern unsigned long static_heap_size;
130 extern int initialized;
131 static void
132 get_lim_data (void)
133 {
134 if (!initialized)
135 {
136 lim_data = (unsigned int) -1; /* static_heap_size; */
137 }
138 else
139 {
140 lim_data = (unsigned int) -1;
141 }
142 }
143 #else
144 #ifdef NO_LIM_DATA
145 static void
146 get_lim_data (void)
147 {
148 lim_data = (unsigned int) -1;
149 }
150 #else /* not NO_LIM_DATA */
151
152 #ifdef USG
153
154 static void
155 get_lim_data (void)
156 {
157 lim_data = (unsigned int) -1;
158
159 /* Use the ulimit call, if we seem to have it. */
160 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
161 lim_data = ulimit (3, 0);
162 #endif
163
164 /* If that didn't work, just use the macro's value. */
165 #ifdef ULIMIT_BREAK_VALUE
166 if (lim_data == (unsigned int) -1)
167 lim_data = ULIMIT_BREAK_VALUE;
168 #endif
169
170 lim_data -= (long) data_space_start;
171 }
172
173 #else /* not USG */
174 #if defined( WINDOWSNT )
175
176 static void
177 get_lim_data (void)
178 {
179 extern unsigned long data_region_size;
180 lim_data = data_region_size;
181 }
182
183 #else
184 #if !defined (BSD4_2) && !defined (__osf__)
185
186 #ifdef MSDOS
187 void
188 get_lim_data (void)
189 {
190 _go32_dpmi_meminfo info;
191
192 _go32_dpmi_get_free_memory_information (&info);
193 lim_data = info.available_memory;
194 }
195 #else /* not MSDOS */
196 static void
197 get_lim_data (void)
198 {
199 lim_data = vlimit (LIM_DATA, -1);
200 }
201 #endif /* not MSDOS */
202
203 #else /* BSD4_2 */
204
205 static void
206 get_lim_data (void)
207 {
208 struct rlimit XXrlimit;
209
210 getrlimit (RLIMIT_DATA, &XXrlimit);
211 #ifdef RLIM_INFINITY
212 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
213 #else
214 lim_data = XXrlimit.rlim_cur; /* soft limit */
215 #endif
216 }
217 #endif /* BSD4_2 */
218 #endif /* not WINDOWSNT */
219 #endif /* not USG */
220 #endif /* not NO_LIM_DATA */
221 #endif /* not HEAP_IN_DATA */
222
223 #endif /* _XEMACS_MEM_LIMITS_H_ */