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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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243
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23 /* #### This ancient code really sucks.
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24 configure should check for:
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25 HAVE_SYS_RESOURCE_H, HAVE_ULIMIT_H, HAVE_GETRLIMIT, HAVE_ULIMIT,
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26 and select action based on those values.
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27 getrlimit() should be preferred to ulimit().
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28 On Linux, ulimit() is deprecated and always returns -1. */
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29
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30 #ifndef _XEMACS_MEM_LIMITS_H_
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31 #define _XEMACS_MEM_LIMITS_H_
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32
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169
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33 #ifdef HAVE_CONFIG_H
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34 #include <config.h>
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35 #endif
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36
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37 #ifdef HAVE_ULIMIT_H
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38 #include <ulimit.h>
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39 #endif
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40
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0
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41 #ifdef MSDOS
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42 #include <dpmi.h>
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43 #endif
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44
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45 /* Some systems need this before <sys/resource.h>. */
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46 #include <sys/types.h>
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47
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48 #ifdef _LIBC
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49
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50 #include <sys/resource.h>
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51 #define BSD4_2 /* Tell code below to use getrlimit. */
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52
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53 /* Old Linux startup code won't define __data_start. */
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54 extern int etext, __data_start; weak_symbol (__data_start)
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55 #define start_of_data() (&__data_start ?: &etext)
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56
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243
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57 #else /* not GNU libc */
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0
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58
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59 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
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60 #include <sys/time.h>
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61 #include <sys/resource.h>
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62 #endif
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63
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64 #if defined(__bsdi__) || defined(__NetBSD__)
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65 #define BSD4_2
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66 #endif
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67
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68 #ifndef BSD4_2
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69 #ifndef USG
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70 #ifndef MSDOS
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71 #ifndef WINDOWSNT
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231
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72 #ifndef __CYGWIN32__
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73 #include <sys/vlimit.h>
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231
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74 #endif /* not __CYGWIN32__ */
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75 #endif /* not WINDOWSNT */
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76 #endif /* not MSDOS */
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77 #endif /* not USG */
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78 #else /* if BSD4_2 */
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79 #include <sys/time.h>
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80 #include <sys/resource.h>
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81 #endif /* BSD4_2 */
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82
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83 #ifdef emacs
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84 /* The important properties of this type are that 1) it's a pointer, and
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85 2) arithmetic on it should work as if the size of the object pointed
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86 to has a size of 1. */
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87 #ifdef __STDC__
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88 typedef void *POINTER;
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89 #else
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90 typedef char *POINTER;
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91 #endif
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92
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231
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93 #ifndef __CYGWIN32__
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94 typedef unsigned long SIZE;
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231
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95 #endif
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96
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97 #ifdef NULL
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98 #undef NULL
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99 #endif
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100 #define NULL ((POINTER) 0)
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101
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102 extern POINTER start_of_data ();
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103 #ifdef DATA_SEG_BITS
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104 #define EXCEEDS_LISP_PTR(ptr) \
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105 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
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106 #else
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107 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
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108 #endif
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109
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110 #ifdef BSD
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111 #ifndef DATA_SEG_BITS
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112 extern int etext;
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113 #define start_of_data() &etext
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114 #endif
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115 #endif
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116
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117 #else /* not emacs */
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118 extern char etext;
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119 #define start_of_data() &etext
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120 #endif /* not emacs */
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121
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122 #endif /* not _LIBC */
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123
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124
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125
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126 /* start of data space; can be changed by calling malloc_init */
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127 static POINTER data_space_start;
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128
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129 /* Number of bytes of writable memory we can expect to be able to get */
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130 extern unsigned int lim_data;
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131
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132 #ifdef NO_LIM_DATA
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133 static void
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134 get_lim_data (void)
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135 {
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136 lim_data = -1;
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137 }
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138 #else /* not NO_LIM_DATA */
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139
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140 #ifdef USG
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141
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142 static void
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143 get_lim_data (void)
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144 {
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145 lim_data = -1;
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146
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147 /* Use the ulimit call, if we seem to have it. */
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148 #if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
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149 lim_data = ulimit (3, 0);
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150 #endif
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151
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152 /* If that didn't work, just use the macro's value. */
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153 #ifdef ULIMIT_BREAK_VALUE
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154 if (lim_data == -1)
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155 lim_data = ULIMIT_BREAK_VALUE;
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156 #endif
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157
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158 lim_data -= (long) data_space_start;
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159 }
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160
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161 #else /* not USG */
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162 #if defined( WINDOWSNT ) || defined (__CYGWIN32__)
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163
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164 static void
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165 get_lim_data (void)
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166 {
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167 extern unsigned long data_region_size;
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168 lim_data = data_region_size;
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169 }
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170
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171 #else
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172 #if !defined (BSD4_2) && !defined (__osf__)
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173
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174 #ifdef MSDOS
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175 void
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176 get_lim_data (void)
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177 {
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178 _go32_dpmi_meminfo info;
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179
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180 _go32_dpmi_get_free_memory_information (&info);
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181 lim_data = info.available_memory;
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182 }
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183 #else /* not MSDOS */
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184 static void
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185 get_lim_data (void)
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186 {
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187 lim_data = vlimit (LIM_DATA, -1);
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188 }
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189 #endif /* not MSDOS */
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190
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191 #else /* BSD4_2 */
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192
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193 static void
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194 get_lim_data (void)
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195 {
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196 struct rlimit XXrlimit;
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197
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198 getrlimit (RLIMIT_DATA, &XXrlimit);
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199 #ifdef RLIM_INFINITY
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200 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
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201 #else
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202 lim_data = XXrlimit.rlim_cur; /* soft limit */
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203 #endif
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204 }
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205 #endif /* BSD4_2 */
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206 #endif /* not WINDOWSNT */
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207 #endif /* not USG */
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208 #endif /* not NO_LIM_DATA */
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209
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210 #endif /* _XEMACS_MEM_LIMITS_H_ */
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