| 1 | /* Includes for memory limit warnings. |
| 2 | Copyright (C) 1990, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
| 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 2, 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, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #ifdef MSDOS |
| 22 | #include <dpmi.h> |
| 23 | #endif |
| 24 | |
| 25 | /* Some systems need this before <sys/resource.h>. */ |
| 26 | #include <sys/types.h> |
| 27 | |
| 28 | #ifdef _LIBC |
| 29 | |
| 30 | #include <sys/resource.h> |
| 31 | #define BSD4_2 /* Tell code below to use getrlimit. */ |
| 32 | |
| 33 | /* Old Linux startup code won't define __data_start. */ |
| 34 | extern int etext, __data_start; weak_extern (__data_start) |
| 35 | #define start_of_data() (&__data_start ?: &etext) |
| 36 | |
| 37 | #else /* not _LIBC */ |
| 38 | |
| 39 | #if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha)) |
| 40 | #include <sys/time.h> |
| 41 | #include <sys/resource.h> |
| 42 | #endif |
| 43 | |
| 44 | #ifdef __bsdi__ |
| 45 | #define BSD4_2 |
| 46 | #endif |
| 47 | |
| 48 | #ifndef BSD4_2 |
| 49 | #ifndef USG |
| 50 | #ifndef MSDOS |
| 51 | #ifndef WINDOWSNT |
| 52 | #include <sys/vlimit.h> |
| 53 | #endif /* not WINDOWSNT */ |
| 54 | #endif /* not MSDOS */ |
| 55 | #endif /* not USG */ |
| 56 | #else /* if BSD4_2 */ |
| 57 | #include <sys/time.h> |
| 58 | #include <sys/resource.h> |
| 59 | #endif /* BSD4_2 */ |
| 60 | |
| 61 | #ifdef emacs |
| 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. */ |
| 65 | #ifdef __STDC__ |
| 66 | typedef void *POINTER; |
| 67 | #else |
| 68 | typedef char *POINTER; |
| 69 | #endif |
| 70 | |
| 71 | typedef unsigned long SIZE; |
| 72 | |
| 73 | #ifdef NULL |
| 74 | #undef NULL |
| 75 | #endif |
| 76 | #define NULL ((POINTER) 0) |
| 77 | |
| 78 | extern POINTER start_of_data (); |
| 79 | #ifdef DATA_SEG_BITS |
| 80 | #define EXCEEDS_LISP_PTR(ptr) \ |
| 81 | (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS) |
| 82 | #else |
| 83 | #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS) |
| 84 | #endif |
| 85 | |
| 86 | #ifdef BSD |
| 87 | #ifndef DATA_SEG_BITS |
| 88 | extern char etext; |
| 89 | #define start_of_data() &etext |
| 90 | #endif |
| 91 | #endif |
| 92 | |
| 93 | #else /* not emacs */ |
| 94 | extern char etext; |
| 95 | #define start_of_data() &etext |
| 96 | #endif /* not emacs */ |
| 97 | |
| 98 | #endif /* not _LIBC */ |
| 99 | |
| 100 | |
| 101 | /* start of data space; can be changed by calling malloc_init */ |
| 102 | static POINTER data_space_start; |
| 103 | |
| 104 | /* Number of bytes of writable memory we can expect to be able to get */ |
| 105 | static unsigned long lim_data; |
| 106 | |
| 107 | #ifdef NO_LIM_DATA |
| 108 | static void |
| 109 | get_lim_data () |
| 110 | { |
| 111 | lim_data = -1; |
| 112 | } |
| 113 | #else /* not NO_LIM_DATA */ |
| 114 | |
| 115 | #ifdef USG |
| 116 | |
| 117 | static void |
| 118 | get_lim_data () |
| 119 | { |
| 120 | extern long ulimit (); |
| 121 | |
| 122 | lim_data = -1; |
| 123 | |
| 124 | /* Use the ulimit call, if we seem to have it. */ |
| 125 | #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX) |
| 126 | lim_data = ulimit (3, 0); |
| 127 | #endif |
| 128 | |
| 129 | /* If that didn't work, just use the macro's value. */ |
| 130 | #ifdef ULIMIT_BREAK_VALUE |
| 131 | if (lim_data == -1) |
| 132 | lim_data = ULIMIT_BREAK_VALUE; |
| 133 | #endif |
| 134 | |
| 135 | lim_data -= (long) data_space_start; |
| 136 | } |
| 137 | |
| 138 | #else /* not USG */ |
| 139 | #ifdef WINDOWSNT |
| 140 | |
| 141 | static void |
| 142 | get_lim_data () |
| 143 | { |
| 144 | extern unsigned long data_region_size; |
| 145 | lim_data = data_region_size; |
| 146 | } |
| 147 | |
| 148 | #else |
| 149 | #if !defined (BSD4_2) && !defined (__osf__) |
| 150 | |
| 151 | #ifdef MSDOS |
| 152 | void |
| 153 | get_lim_data () |
| 154 | { |
| 155 | _go32_dpmi_meminfo info; |
| 156 | |
| 157 | _go32_dpmi_get_free_memory_information (&info); |
| 158 | lim_data = info.available_memory; |
| 159 | } |
| 160 | #else /* not MSDOS */ |
| 161 | static void |
| 162 | get_lim_data () |
| 163 | { |
| 164 | lim_data = vlimit (LIM_DATA, -1); |
| 165 | } |
| 166 | #endif /* not MSDOS */ |
| 167 | |
| 168 | #else /* BSD4_2 */ |
| 169 | |
| 170 | static void |
| 171 | get_lim_data () |
| 172 | { |
| 173 | struct rlimit XXrlimit; |
| 174 | |
| 175 | getrlimit (RLIMIT_DATA, &XXrlimit); |
| 176 | #ifdef RLIM_INFINITY |
| 177 | lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */ |
| 178 | #else |
| 179 | lim_data = XXrlimit.rlim_cur; /* soft limit */ |
| 180 | #endif |
| 181 | } |
| 182 | #endif /* BSD4_2 */ |
| 183 | #endif /* not WINDOWSNT */ |
| 184 | #endif /* not USG */ |
| 185 | #endif /* not NO_LIM_DATA */ |