Commit | Line | Data |
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9889c728 | 1 | /* Includes for memory limit warnings. |
c6c5df7f | 2 | Copyright (C) 1990, 1993 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 | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
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 | ||
20 | #ifndef BSD4_2 | |
21 | #ifndef USG | |
22 | #include <sys/vlimit.h> | |
23 | #endif /* not USG */ | |
24 | #else /* if BSD4_2 */ | |
25 | #include <sys/time.h> | |
26 | #include <sys/resource.h> | |
27 | #endif /* BSD4_2 */ | |
28 | ||
6fb48933 | 29 | #ifdef emacs |
5399ec5d JB |
30 | /* The important properties of this type are that 1) it's a pointer, and |
31 | 2) arithmetic on it should work as if the size of the object pointed | |
32 | to has a size of 1. */ | |
9889c728 JB |
33 | #ifdef __STDC__ |
34 | typedef void *POINTER; | |
35 | #else | |
36 | typedef char *POINTER; | |
37 | #endif | |
38 | ||
39 | typedef unsigned long SIZE; | |
40 | ||
41 | #ifdef NULL | |
42 | #undef NULL | |
43 | #endif | |
44 | #define NULL ((POINTER) 0) | |
45 | ||
9889c728 | 46 | extern POINTER start_of_data (); |
27050994 JB |
47 | #ifdef DATA_SEG_BITS |
48 | #define EXCEEDS_LISP_PTR(ptr) \ | |
49 | (((unsigned int) (ptr) & ~DATA_SEG_BITS) >> VALBITS) | |
50 | #else | |
6fb48933 | 51 | #define EXCEEDS_LISP_PTR(ptr) ((unsigned int) (ptr) >> VALBITS) |
27050994 | 52 | #endif |
9889c728 JB |
53 | |
54 | #ifdef BSD | |
55 | #ifndef DATA_SEG_BITS | |
94d7c01a | 56 | extern char etext; |
9889c728 JB |
57 | #define start_of_data() &etext |
58 | #endif | |
59 | #endif | |
60 | ||
61 | #else /* Not emacs */ | |
94d7c01a | 62 | extern char etext; |
9889c728 JB |
63 | #define start_of_data() &etext |
64 | #endif /* Not emacs */ | |
65 | ||
66 | ||
67 | ||
68 | /* start of data space; can be changed by calling malloc_init */ | |
69 | static POINTER data_space_start; | |
70 | ||
71 | /* Number of bytes of writable memory we can expect to be able to get */ | |
72 | static unsigned int lim_data; | |
73 | ||
9889c728 JB |
74 | #ifdef USG |
75 | ||
c52713b1 | 76 | static void |
9889c728 JB |
77 | get_lim_data () |
78 | { | |
79 | extern long ulimit (); | |
161aa2f8 JB |
80 | |
81 | lim_data = -1; | |
82 | ||
83 | /* Use the ulimit call, if we seem to have it. */ | |
84 | #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX) | |
9889c728 JB |
85 | lim_data = ulimit (3, 0); |
86 | #endif | |
87 | ||
161aa2f8 JB |
88 | /* If that didn't work, just use the macro's value. */ |
89 | #ifdef ULIMIT_BREAK_VALUE | |
90 | if (lim_data == -1) | |
91 | lim_data = ULIMIT_BREAK_VALUE; | |
92 | #endif | |
93 | ||
9889c728 JB |
94 | lim_data -= (long) data_space_start; |
95 | } | |
96 | ||
97 | #else /* not USG */ | |
98 | #ifndef BSD4_2 | |
99 | ||
c52713b1 | 100 | static void |
9889c728 JB |
101 | get_lim_data () |
102 | { | |
103 | lim_data = vlimit (LIM_DATA, -1); | |
104 | } | |
105 | ||
106 | #else /* BSD4_2 */ | |
107 | ||
c52713b1 | 108 | static void |
9889c728 JB |
109 | get_lim_data () |
110 | { | |
111 | struct rlimit XXrlimit; | |
112 | ||
113 | getrlimit (RLIMIT_DATA, &XXrlimit); | |
114 | #ifdef RLIM_INFINITY | |
115 | lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */ | |
116 | #else | |
117 | lim_data = XXrlimit.rlim_cur; /* soft limit */ | |
118 | #endif | |
119 | } | |
120 | #endif /* BSD4_2 */ | |
121 | #endif /* not USG */ |