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