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1 /* Includes for memory limit warnings.
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2 Copyright (C) 1990, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.30. */
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22
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23 #ifndef _XEMACS_MEM_LIMITS_H_
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24 #define _XEMACS_MEM_LIMITS_H_
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25
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26 #ifdef MSDOS
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27 #include <dpmi.h>
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28 #endif
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29
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30 /* Some systems need this before <sys/resource.h>. */
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31 #include <sys/types.h>
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32
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33 #ifdef _LIBC
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34
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35 #include <sys/resource.h>
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36 #define BSD4_2 /* Tell code below to use getrlimit. */
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37
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38 /* Old Linux startup code won't define __data_start. */
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39 extern int etext, __data_start; weak_symbol (__data_start)
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40 #define start_of_data() (&__data_start ?: &etext)
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41
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42 #else /* not _LIBC */
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43
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44 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
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45 #include <sys/time.h>
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46 #include <sys/resource.h>
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47 #endif
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48
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49 #if defined(__bsdi__) || defined(__NetBSD__)
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50 #define BSD4_2
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51 #endif
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52
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53 #ifndef BSD4_2
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54 #ifndef USG
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55 #ifndef MSDOS
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56 #ifndef WINDOWSNT
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57 #include <sys/vlimit.h>
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58 #endif /* not WINDOWSNT */
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59 #endif /* not MSDOS */
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60 #endif /* not USG */
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61 #else /* if BSD4_2 */
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62 #include <sys/time.h>
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63 #include <sys/resource.h>
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64 #endif /* BSD4_2 */
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65
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66 #ifdef emacs
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67 /* The important properties of this type are that 1) it's a pointer, and
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68 2) arithmetic on it should work as if the size of the object pointed
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69 to has a size of 1. */
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70 #ifdef __STDC__
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71 typedef void *POINTER;
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72 #else
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73 typedef char *POINTER;
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74 #endif
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75
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76 typedef unsigned long SIZE;
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77
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78 #ifdef NULL
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79 #undef NULL
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80 #endif
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81 #define NULL ((POINTER) 0)
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82
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83 extern POINTER start_of_data ();
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84 #ifdef DATA_SEG_BITS
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85 #define EXCEEDS_LISP_PTR(ptr) \
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86 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
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87 #else
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88 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
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89 #endif
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90
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91 #ifdef BSD
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92 #ifndef DATA_SEG_BITS
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93 extern int etext;
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94 #define start_of_data() &etext
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95 #endif
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96 #endif
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97
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98 #else /* not emacs */
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99 extern char etext;
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100 #define start_of_data() &etext
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101 #endif /* not emacs */
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102
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103 #endif /* not _LIBC */
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104
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105
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106
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107 /* start of data space; can be changed by calling malloc_init */
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108 static POINTER data_space_start;
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109
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110 /* Number of bytes of writable memory we can expect to be able to get */
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111 extern unsigned int lim_data;
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112
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113 #ifdef NO_LIM_DATA
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114 static void
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74
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115 get_lim_data (void)
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0
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116 {
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117 lim_data = -1;
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118 }
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119 #else /* not NO_LIM_DATA */
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120
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121 #ifdef USG
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122
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123 static void
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74
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124 get_lim_data (void)
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0
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125 {
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126 extern long ulimit ();
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127
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128 lim_data = -1;
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129
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130 /* Use the ulimit call, if we seem to have it. */
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131 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
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132 lim_data = ulimit (3, 0);
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133 #endif
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134
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135 /* If that didn't work, just use the macro's value. */
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136 #ifdef ULIMIT_BREAK_VALUE
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137 if (lim_data == -1)
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138 lim_data = ULIMIT_BREAK_VALUE;
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139 #endif
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140
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141 lim_data -= (long) data_space_start;
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142 }
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143
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144 #else /* not USG */
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145 #ifdef WINDOWSNT
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146
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147 static void
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74
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148 get_lim_data (void)
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0
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149 {
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150 extern unsigned long data_region_size;
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151 lim_data = data_region_size;
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152 }
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153
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154 #else
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155 #if !defined (BSD4_2) && !defined (__osf__)
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156
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157 #ifdef MSDOS
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158 void
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74
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159 get_lim_data (void)
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0
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160 {
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161 _go32_dpmi_meminfo info;
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162
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163 _go32_dpmi_get_free_memory_information (&info);
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164 lim_data = info.available_memory;
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165 }
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166 #else /* not MSDOS */
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167 static void
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74
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168 get_lim_data (void)
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169 {
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170 lim_data = vlimit (LIM_DATA, -1);
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171 }
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172 #endif /* not MSDOS */
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173
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174 #else /* BSD4_2 */
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175
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176 static void
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74
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177 get_lim_data (void)
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178 {
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179 struct rlimit XXrlimit;
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180
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181 getrlimit (RLIMIT_DATA, &XXrlimit);
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182 #ifdef RLIM_INFINITY
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183 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
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184 #else
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185 lim_data = XXrlimit.rlim_cur; /* soft limit */
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186 #endif
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187 }
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188 #endif /* BSD4_2 */
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189 #endif /* not WINDOWSNT */
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190 #endif /* not USG */
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191 #endif /* not NO_LIM_DATA */
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192
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193 #endif /* _XEMACS_MEM_LIMITS_H_ */
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