Commit | Line | Data |
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9889c728 | 1 | /* Includes for memory limit warnings. |
6d0dbbaf | 2 | Copyright (C) 1990, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
9889c728 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
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 | |
cd1168e1 | 8 | the Free Software Foundation; either version 2, or (at your option) |
9889c728 JB |
9 | any later version. |
10 | ||
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. | |
15 | ||
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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
9889c728 | 20 | |
004164c5 RS |
21 | #ifdef MSDOS |
22 | #include <dpmi.h> | |
a8c1733b | 23 | extern int etext; |
004164c5 RS |
24 | #endif |
25 | ||
f920c441 RM |
26 | /* Some systems need this before <sys/resource.h>. */ |
27 | #include <sys/types.h> | |
28 | ||
b1814de2 RM |
29 | #ifdef _LIBC |
30 | ||
31 | #include <sys/resource.h> | |
ab8fb193 | 32 | #define BSD4_2 /* Tell code below to use getrlimit. */ |
b1814de2 | 33 | |
6c6b28ea | 34 | /* Old Linux startup code won't define __data_start. */ |
6d0dbbaf | 35 | extern int etext, __data_start; weak_extern (__data_start) |
6c6b28ea | 36 | #define start_of_data() (&__data_start ?: &etext) |
240049aa | 37 | |
3999f961 | 38 | #else /* not _LIBC */ |
b1814de2 | 39 | |
9aae3fc9 | 40 | #if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha)) |
c027d070 JB |
41 | #include <sys/time.h> |
42 | #include <sys/resource.h> | |
43 | #endif | |
44 | ||
cd1168e1 RS |
45 | #ifdef __bsdi__ |
46 | #define BSD4_2 | |
47 | #endif | |
48 | ||
9889c728 JB |
49 | #ifndef BSD4_2 |
50 | #ifndef USG | |
004164c5 | 51 | #ifndef MSDOS |
dbecffaa | 52 | #ifndef WINDOWSNT |
9889c728 | 53 | #include <sys/vlimit.h> |
dbecffaa | 54 | #endif /* not WINDOWSNT */ |
004164c5 | 55 | #endif /* not MSDOS */ |
9889c728 JB |
56 | #endif /* not USG */ |
57 | #else /* if BSD4_2 */ | |
58 | #include <sys/time.h> | |
59 | #include <sys/resource.h> | |
60 | #endif /* BSD4_2 */ | |
61 | ||
6fb48933 | 62 | #ifdef emacs |
5399ec5d JB |
63 | /* The important properties of this type are that 1) it's a pointer, and |
64 | 2) arithmetic on it should work as if the size of the object pointed | |
65 | to has a size of 1. */ | |
8bbffb13 | 66 | typedef POINTER_TYPE *POINTER; |
9889c728 JB |
67 | |
68 | typedef unsigned long SIZE; | |
69 | ||
70 | #ifdef NULL | |
71 | #undef NULL | |
72 | #endif | |
73 | #define NULL ((POINTER) 0) | |
74 | ||
9889c728 | 75 | extern POINTER start_of_data (); |
27050994 JB |
76 | #ifdef DATA_SEG_BITS |
77 | #define EXCEEDS_LISP_PTR(ptr) \ | |
9aae3fc9 | 78 | (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS) |
27050994 | 79 | #else |
9aae3fc9 | 80 | #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS) |
27050994 | 81 | #endif |
9889c728 | 82 | |
f456a2bc KR |
83 | #ifdef DATA_START |
84 | #define start_of_data() ((char *)DATA_START) | |
85 | #endif | |
86 | ||
6df54671 | 87 | #ifdef BSD_SYSTEM |
9889c728 | 88 | #ifndef DATA_SEG_BITS |
f456a2bc | 89 | #ifndef DATA_START |
94d7c01a | 90 | extern char etext; |
9889c728 JB |
91 | #define start_of_data() &etext |
92 | #endif | |
93 | #endif | |
f456a2bc | 94 | #endif |
9889c728 | 95 | |
6c6b28ea | 96 | #else /* not emacs */ |
94d7c01a | 97 | extern char etext; |
9889c728 | 98 | #define start_of_data() &etext |
3999f961 | 99 | #endif /* not emacs */ |
9889c728 | 100 | |
3999f961 | 101 | #endif /* not _LIBC */ |
240049aa | 102 | |
9889c728 JB |
103 | |
104 | /* start of data space; can be changed by calling malloc_init */ | |
105 | static POINTER data_space_start; | |
106 | ||
107 | /* Number of bytes of writable memory we can expect to be able to get */ | |
78c33db1 | 108 | static unsigned long lim_data; |
9889c728 | 109 | |
19b8fb9d RS |
110 | #ifdef NO_LIM_DATA |
111 | static void | |
112 | get_lim_data () | |
113 | { | |
114 | lim_data = -1; | |
115 | } | |
116 | #else /* not NO_LIM_DATA */ | |
117 | ||
9889c728 JB |
118 | #ifdef USG |
119 | ||
c52713b1 | 120 | static void |
9889c728 JB |
121 | get_lim_data () |
122 | { | |
123 | extern long ulimit (); | |
161aa2f8 JB |
124 | |
125 | lim_data = -1; | |
126 | ||
127 | /* Use the ulimit call, if we seem to have it. */ | |
8a2a6032 | 128 | #if !defined (ULIMIT_BREAK_VALUE) || defined (GNU_LINUX) |
9889c728 JB |
129 | lim_data = ulimit (3, 0); |
130 | #endif | |
131 | ||
161aa2f8 JB |
132 | /* If that didn't work, just use the macro's value. */ |
133 | #ifdef ULIMIT_BREAK_VALUE | |
134 | if (lim_data == -1) | |
135 | lim_data = ULIMIT_BREAK_VALUE; | |
136 | #endif | |
137 | ||
9889c728 JB |
138 | lim_data -= (long) data_space_start; |
139 | } | |
140 | ||
141 | #else /* not USG */ | |
dbecffaa RS |
142 | #ifdef WINDOWSNT |
143 | ||
144 | static void | |
145 | get_lim_data () | |
146 | { | |
3bc2366f AI |
147 | extern unsigned long reserved_heap_size; |
148 | lim_data = reserved_heap_size; | |
dbecffaa RS |
149 | } |
150 | ||
151 | #else | |
004164c5 RS |
152 | #if !defined (BSD4_2) && !defined (__osf__) |
153 | ||
154 | #ifdef MSDOS | |
155 | void | |
156 | get_lim_data () | |
157 | { | |
158 | _go32_dpmi_meminfo info; | |
9889c728 | 159 | |
004164c5 RS |
160 | _go32_dpmi_get_free_memory_information (&info); |
161 | lim_data = info.available_memory; | |
162 | } | |
163 | #else /* not MSDOS */ | |
c52713b1 | 164 | static void |
9889c728 JB |
165 | get_lim_data () |
166 | { | |
167 | lim_data = vlimit (LIM_DATA, -1); | |
168 | } | |
004164c5 | 169 | #endif /* not MSDOS */ |
9889c728 JB |
170 | |
171 | #else /* BSD4_2 */ | |
172 | ||
c52713b1 | 173 | static void |
9889c728 JB |
174 | get_lim_data () |
175 | { | |
176 | struct rlimit XXrlimit; | |
177 | ||
178 | getrlimit (RLIMIT_DATA, &XXrlimit); | |
179 | #ifdef RLIM_INFINITY | |
180 | lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */ | |
181 | #else | |
182 | lim_data = XXrlimit.rlim_cur; /* soft limit */ | |
183 | #endif | |
184 | } | |
185 | #endif /* BSD4_2 */ | |
dbecffaa | 186 | #endif /* not WINDOWSNT */ |
9889c728 | 187 | #endif /* not USG */ |
19b8fb9d | 188 | #endif /* not NO_LIM_DATA */ |