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428
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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 /* #### 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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440
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30 #ifndef INCLUDED_mem_limits_h_
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31 #define INCLUDED_mem_limits_h_
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428
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32
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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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41 /* Some systems need this before <sys/resource.h>. */
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42 #include <sys/types.h>
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43
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44 #ifdef _LIBC
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45
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46 #include <sys/resource.h>
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47 #define BSD4_2 /* Tell code below to use getrlimit. */
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48
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49 /* Old Linux startup code won't define __data_start. */
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50 extern int etext, __data_start; weak_symbol (__data_start)
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51 #define start_of_data() (&__data_start ?: &etext)
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52
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53 #else /* not GNU libc */
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54
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55 #if defined (__osf__) && (defined (__mips) || defined (mips) || defined (__alpha))
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56 #include <sys/time.h>
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57 #include <sys/resource.h>
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58 #endif
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59
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60 #if defined(__bsdi__) || defined(__NetBSD__) || defined(__linux__) || defined(__OpenBSD__)
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61 #define BSD4_2
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62 #endif
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63
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64 #ifndef BSD4_2
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65 #ifndef USG
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442
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66 #ifndef WIN32_NATIVE
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67 #ifndef CYGWIN
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428
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68 #include <sys/vlimit.h>
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442
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69 #endif /* not CYGWIN */
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70 #endif /* not WIN32_NATIVE */
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428
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71 #endif /* not USG */
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72 #else /* if BSD4_2 */
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73 #include <sys/time.h>
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74 #include <sys/resource.h>
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75 #endif /* BSD4_2 */
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76
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77 #ifdef emacs
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78 typedef void *POINTER;
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79
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442
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80 #ifndef CYGWIN
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428
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81 typedef unsigned long SIZE;
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82 #endif
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83
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84 extern POINTER start_of_data (void);
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85 #define EXCEEDS_LISP_PTR(ptr) 0
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86
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87 #ifdef BSD
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88 extern int etext;
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89 #define start_of_data() &etext
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90 #endif
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91
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92 #else /* not emacs */
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93 extern char etext;
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94 #define start_of_data() &etext
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95 #endif /* not emacs */
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96
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97 #endif /* not _LIBC */
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98
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99
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100
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101 /* start of data space; can be changed by calling malloc_init */
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102 static POINTER data_space_start;
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103
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104 /* Number of bytes of writable memory we can expect to be able to get */
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2132
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105 extern unsigned long lim_data;
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428
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106
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442
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107 #if defined (HEAP_IN_DATA) && !defined(PDUMP)
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428
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108 extern unsigned long static_heap_size;
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1632
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109 extern MODULE_API int initialized;
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428
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110 static void
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111 get_lim_data (void)
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112 {
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113 if (!initialized)
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114 {
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2132
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115 lim_data = (unsigned long) -1; /* static_heap_size; */
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428
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116 }
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117 else
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118 {
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2132
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119 lim_data = (unsigned long) -1;
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428
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120 }
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121 }
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122 #else
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123 #ifdef NO_LIM_DATA
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124 static void
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125 get_lim_data (void)
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126 {
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2132
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127 lim_data = (unsigned long) -1;
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428
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128 }
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129 #else /* not NO_LIM_DATA */
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130
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2132
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131 #if defined(USG) && !defined(LINUX)
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428
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132
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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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2132
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136 lim_data = (unsigned long) -1;
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428
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137
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138 /* Use the ulimit call, if we seem to have it. */
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2132
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139 #if !defined (ULIMIT_BREAK_VALUE)
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428
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140 lim_data = ulimit (3, 0);
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141 #endif
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142
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143 /* If that didn't work, just use the macro's value. */
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144 #ifdef ULIMIT_BREAK_VALUE
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2132
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145 if (lim_data == (unsigned long) -1)
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428
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146 lim_data = ULIMIT_BREAK_VALUE;
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147 #endif
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148
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149 lim_data -= (long) data_space_start;
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150 }
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151
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152 #else /* not USG */
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442
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153 #if defined( WIN32_NATIVE )
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428
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154
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155 static void
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156 get_lim_data (void)
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157 {
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158 extern unsigned long data_region_size;
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159 lim_data = data_region_size;
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160 }
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161
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162 #else
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2132
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163 #if !defined (BSD4_2) && !defined (__osf__) && !defined(LINUX)
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428
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164
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165 static void
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166 get_lim_data (void)
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167 {
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168 lim_data = vlimit (LIM_DATA, -1);
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169 }
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170
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171 #else /* BSD4_2 */
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172
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173 static void
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174 get_lim_data (void)
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175 {
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176 struct rlimit XXrlimit;
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177
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178 getrlimit (RLIMIT_DATA, &XXrlimit);
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179 #ifdef RLIM_INFINITY
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180 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
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181 #else
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182 lim_data = XXrlimit.rlim_cur; /* soft limit */
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183 #endif
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184 }
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185 #endif /* BSD4_2 */
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442
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186 #endif /* not WIN32_NATIVE */
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428
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187 #endif /* not USG */
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188 #endif /* not NO_LIM_DATA */
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189 #endif /* not HEAP_IN_DATA */
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190
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440
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191 #endif /* INCLUDED_mem_limits_h_ */
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