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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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169
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26 #ifdef HAVE_CONFIG_H
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27 #include <config.h>
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28 #endif
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29
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30 #ifdef HAVE_ULIMIT_H
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31 #include <ulimit.h>
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32 #endif
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33
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0
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34 #ifdef MSDOS
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35 #include <dpmi.h>
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36 #endif
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37
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38 /* Some systems need this before <sys/resource.h>. */
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39 #include <sys/types.h>
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40
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41 #ifdef _LIBC
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42
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43 #include <sys/resource.h>
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44 #define BSD4_2 /* Tell code below to use getrlimit. */
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45
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46 /* Old Linux startup code won't define __data_start. */
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47 extern int etext, __data_start; weak_symbol (__data_start)
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48 #define start_of_data() (&__data_start ?: &etext)
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49
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50 #else /* not _LIBC */
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51
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52 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
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53 #include <sys/time.h>
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54 #include <sys/resource.h>
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55 #endif
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56
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57 #if defined(__bsdi__) || defined(__NetBSD__)
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58 #define BSD4_2
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59 #endif
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60
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61 #ifndef BSD4_2
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62 #ifndef USG
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63 #ifndef MSDOS
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64 #ifndef WINDOWSNT
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65 #include <sys/vlimit.h>
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66 #endif /* not WINDOWSNT */
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67 #endif /* not MSDOS */
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68 #endif /* not USG */
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69 #else /* if BSD4_2 */
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70 #include <sys/time.h>
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71 #include <sys/resource.h>
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72 #endif /* BSD4_2 */
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73
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74 #ifdef emacs
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75 /* The important properties of this type are that 1) it's a pointer, and
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76 2) arithmetic on it should work as if the size of the object pointed
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77 to has a size of 1. */
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78 #ifdef __STDC__
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79 typedef void *POINTER;
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80 #else
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81 typedef char *POINTER;
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82 #endif
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83
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84 typedef unsigned long SIZE;
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85
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86 #ifdef NULL
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87 #undef NULL
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88 #endif
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89 #define NULL ((POINTER) 0)
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90
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91 extern POINTER start_of_data ();
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92 #ifdef DATA_SEG_BITS
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93 #define EXCEEDS_LISP_PTR(ptr) \
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94 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
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95 #else
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96 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
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97 #endif
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98
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99 #ifdef BSD
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100 #ifndef DATA_SEG_BITS
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101 extern int etext;
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102 #define start_of_data() &etext
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103 #endif
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104 #endif
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105
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106 #else /* not emacs */
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107 extern char etext;
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108 #define start_of_data() &etext
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109 #endif /* not emacs */
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110
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111 #endif /* not _LIBC */
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112
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113
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114
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115 /* start of data space; can be changed by calling malloc_init */
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116 static POINTER data_space_start;
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117
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118 /* Number of bytes of writable memory we can expect to be able to get */
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119 extern unsigned int lim_data;
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120
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121 #ifdef NO_LIM_DATA
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122 static void
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74
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123 get_lim_data (void)
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0
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124 {
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125 lim_data = -1;
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126 }
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127 #else /* not NO_LIM_DATA */
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128
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129 #ifdef USG
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130
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131 static void
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74
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132 get_lim_data (void)
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133 {
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134 lim_data = -1;
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135
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136 /* Use the ulimit call, if we seem to have it. */
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137 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
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138 lim_data = ulimit (3, 0);
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139 #endif
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140
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141 /* If that didn't work, just use the macro's value. */
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142 #ifdef ULIMIT_BREAK_VALUE
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143 if (lim_data == -1)
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144 lim_data = ULIMIT_BREAK_VALUE;
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145 #endif
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146
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147 lim_data -= (long) data_space_start;
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148 }
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149
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150 #else /* not USG */
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151 #ifdef WINDOWSNT
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152
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153 static void
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74
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154 get_lim_data (void)
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155 {
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156 extern unsigned long data_region_size;
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157 lim_data = data_region_size;
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158 }
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159
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160 #else
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161 #if !defined (BSD4_2) && !defined (__osf__)
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162
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163 #ifdef MSDOS
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164 void
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74
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165 get_lim_data (void)
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166 {
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167 _go32_dpmi_meminfo info;
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168
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169 _go32_dpmi_get_free_memory_information (&info);
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170 lim_data = info.available_memory;
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171 }
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172 #else /* not MSDOS */
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173 static void
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74
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174 get_lim_data (void)
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175 {
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176 lim_data = vlimit (LIM_DATA, -1);
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177 }
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178 #endif /* not MSDOS */
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179
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180 #else /* BSD4_2 */
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181
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182 static void
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74
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183 get_lim_data (void)
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184 {
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185 struct rlimit XXrlimit;
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186
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187 getrlimit (RLIMIT_DATA, &XXrlimit);
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188 #ifdef RLIM_INFINITY
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189 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
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190 #else
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191 lim_data = XXrlimit.rlim_cur; /* soft limit */
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192 #endif
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193 }
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194 #endif /* BSD4_2 */
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195 #endif /* not WINDOWSNT */
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196 #endif /* not USG */
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197 #endif /* not NO_LIM_DATA */
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198
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199 #endif /* _XEMACS_MEM_LIMITS_H_ */
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