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