Commit | Line | Data |
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9889c728 | 1 | /* Includes for memory limit warnings. |
240049aa | 2 | Copyright (C) 1990, 1993, 1994, 1995 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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
004164c5 RS |
20 | #ifdef MSDOS |
21 | #include <dpmi.h> | |
22 | #endif | |
23 | ||
f920c441 RM |
24 | /* Some systems need this before <sys/resource.h>. */ |
25 | #include <sys/types.h> | |
26 | ||
b1814de2 RM |
27 | #ifdef _LIBC |
28 | ||
29 | #include <sys/resource.h> | |
ab8fb193 | 30 | #define BSD4_2 /* Tell code below to use getrlimit. */ |
b1814de2 | 31 | |
240049aa RM |
32 | extern int __data_start; |
33 | #define start_of_data() &__data_start | |
34 | ||
3999f961 | 35 | #else /* not _LIBC */ |
b1814de2 | 36 | |
9aae3fc9 | 37 | #if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha)) |
c027d070 JB |
38 | #include <sys/time.h> |
39 | #include <sys/resource.h> | |
40 | #endif | |
41 | ||
cd1168e1 RS |
42 | #ifdef __bsdi__ |
43 | #define BSD4_2 | |
44 | #endif | |
45 | ||
9889c728 JB |
46 | #ifndef BSD4_2 |
47 | #ifndef USG | |
004164c5 | 48 | #ifndef MSDOS |
dbecffaa | 49 | #ifndef WINDOWSNT |
9889c728 | 50 | #include <sys/vlimit.h> |
dbecffaa | 51 | #endif /* not WINDOWSNT */ |
004164c5 | 52 | #endif /* not MSDOS */ |
9889c728 JB |
53 | #endif /* not USG */ |
54 | #else /* if BSD4_2 */ | |
55 | #include <sys/time.h> | |
56 | #include <sys/resource.h> | |
57 | #endif /* BSD4_2 */ | |
58 | ||
6fb48933 | 59 | #ifdef emacs |
5399ec5d JB |
60 | /* The important properties of this type are that 1) it's a pointer, and |
61 | 2) arithmetic on it should work as if the size of the object pointed | |
62 | to has a size of 1. */ | |
9889c728 JB |
63 | #ifdef __STDC__ |
64 | typedef void *POINTER; | |
65 | #else | |
66 | typedef char *POINTER; | |
67 | #endif | |
68 | ||
69 | typedef unsigned long SIZE; | |
70 | ||
71 | #ifdef NULL | |
72 | #undef NULL | |
73 | #endif | |
74 | #define NULL ((POINTER) 0) | |
75 | ||
9889c728 | 76 | extern POINTER start_of_data (); |
27050994 JB |
77 | #ifdef DATA_SEG_BITS |
78 | #define EXCEEDS_LISP_PTR(ptr) \ | |
9aae3fc9 | 79 | (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS) |
27050994 | 80 | #else |
9aae3fc9 | 81 | #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS) |
27050994 | 82 | #endif |
9889c728 JB |
83 | |
84 | #ifdef BSD | |
85 | #ifndef DATA_SEG_BITS | |
94d7c01a | 86 | extern char etext; |
9889c728 JB |
87 | #define start_of_data() &etext |
88 | #endif | |
89 | #endif | |
90 | ||
3999f961 | 91 | #else /* not emacs */ |
94d7c01a | 92 | extern char etext; |
9889c728 | 93 | #define start_of_data() &etext |
3999f961 | 94 | #endif /* not emacs */ |
9889c728 | 95 | |
3999f961 | 96 | #endif /* not _LIBC */ |
240049aa | 97 | |
9889c728 JB |
98 | |
99 | /* start of data space; can be changed by calling malloc_init */ | |
100 | static POINTER data_space_start; | |
101 | ||
102 | /* Number of bytes of writable memory we can expect to be able to get */ | |
103 | static unsigned int lim_data; | |
104 | ||
19b8fb9d RS |
105 | #ifdef NO_LIM_DATA |
106 | static void | |
107 | get_lim_data () | |
108 | { | |
109 | lim_data = -1; | |
110 | } | |
111 | #else /* not NO_LIM_DATA */ | |
112 | ||
9889c728 JB |
113 | #ifdef USG |
114 | ||
c52713b1 | 115 | static void |
9889c728 JB |
116 | get_lim_data () |
117 | { | |
118 | extern long ulimit (); | |
161aa2f8 JB |
119 | |
120 | lim_data = -1; | |
121 | ||
122 | /* Use the ulimit call, if we seem to have it. */ | |
123 | #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX) | |
9889c728 JB |
124 | lim_data = ulimit (3, 0); |
125 | #endif | |
126 | ||
161aa2f8 JB |
127 | /* If that didn't work, just use the macro's value. */ |
128 | #ifdef ULIMIT_BREAK_VALUE | |
129 | if (lim_data == -1) | |
130 | lim_data = ULIMIT_BREAK_VALUE; | |
131 | #endif | |
132 | ||
9889c728 JB |
133 | lim_data -= (long) data_space_start; |
134 | } | |
135 | ||
136 | #else /* not USG */ | |
dbecffaa RS |
137 | #ifdef WINDOWSNT |
138 | ||
139 | static void | |
140 | get_lim_data () | |
141 | { | |
142 | extern unsigned long data_region_size; | |
143 | lim_data = data_region_size; | |
144 | } | |
145 | ||
146 | #else | |
004164c5 RS |
147 | #if !defined (BSD4_2) && !defined (__osf__) |
148 | ||
149 | #ifdef MSDOS | |
150 | void | |
151 | get_lim_data () | |
152 | { | |
153 | _go32_dpmi_meminfo info; | |
9889c728 | 154 | |
004164c5 RS |
155 | _go32_dpmi_get_free_memory_information (&info); |
156 | lim_data = info.available_memory; | |
157 | } | |
158 | #else /* not MSDOS */ | |
c52713b1 | 159 | static void |
9889c728 JB |
160 | get_lim_data () |
161 | { | |
162 | lim_data = vlimit (LIM_DATA, -1); | |
163 | } | |
004164c5 | 164 | #endif /* not MSDOS */ |
9889c728 JB |
165 | |
166 | #else /* BSD4_2 */ | |
167 | ||
c52713b1 | 168 | static void |
9889c728 JB |
169 | get_lim_data () |
170 | { | |
171 | struct rlimit XXrlimit; | |
172 | ||
173 | getrlimit (RLIMIT_DATA, &XXrlimit); | |
174 | #ifdef RLIM_INFINITY | |
175 | lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */ | |
176 | #else | |
177 | lim_data = XXrlimit.rlim_cur; /* soft limit */ | |
178 | #endif | |
179 | } | |
180 | #endif /* BSD4_2 */ | |
dbecffaa | 181 | #endif /* not WINDOWSNT */ |
9889c728 | 182 | #endif /* not USG */ |
19b8fb9d | 183 | #endif /* not NO_LIM_DATA */ |