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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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2263
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23 /* Subsequently cleaned up and reorganised, made to use configure. */
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428
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24
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440
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25 #ifndef INCLUDED_mem_limits_h_
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26 #define INCLUDED_mem_limits_h_
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428
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27
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28 #ifdef HAVE_CONFIG_H
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29 #include <config.h>
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30 #endif
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31
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32 #ifdef HAVE_ULIMIT_H
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33 #include <ulimit.h>
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34 #endif
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35
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2263
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36 #ifdef HAVE_SYS_RESOURCE_H
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37 /* Some systems need either sys/types.h or sys/time.h before <sys/resource.h>. */
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428
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38 #include <sys/types.h>
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2263
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39 #include <sys/time.h>
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40 #include <sys/resource.h>
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41 #endif
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42
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43 #ifdef HAVE_SYS_VLIMIT_H
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44 #include <sys/vlimit.h>
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45 #endif
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428
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46
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47 #ifdef _LIBC
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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 #ifdef emacs
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56 typedef void *POINTER;
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57
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442
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58 #ifndef CYGWIN
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428
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59 typedef unsigned long SIZE;
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60 #endif
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61
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62 extern POINTER start_of_data (void);
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63 #define EXCEEDS_LISP_PTR(ptr) 0
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64
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65 #ifdef BSD
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66 extern int etext;
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67 #define start_of_data() &etext
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68 #endif
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69
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70 #else /* not emacs */
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71 extern char etext;
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72 #define start_of_data() &etext
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73 #endif /* not emacs */
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74
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75 #endif /* not _LIBC */
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76
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77
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78
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79 /* start of data space; can be changed by calling malloc_init */
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80 static POINTER data_space_start;
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81
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82 /* Number of bytes of writable memory we can expect to be able to get */
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2132
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83 extern unsigned long lim_data;
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428
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84
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2263
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85 /* The implementation of get_lim_data() is very machine dependent. */
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86
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442
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87 #if defined (HEAP_IN_DATA) && !defined(PDUMP)
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428
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88 extern unsigned long static_heap_size;
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1632
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89 extern MODULE_API int initialized;
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2263
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90
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428
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91 static void
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92 get_lim_data (void)
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93 {
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94 if (!initialized)
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95 {
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2132
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96 lim_data = (unsigned long) -1; /* static_heap_size; */
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428
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97 }
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98 else
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99 {
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2132
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100 lim_data = (unsigned long) -1;
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428
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101 }
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102 }
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2263
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103
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104 #elif defined(NO_LIM_DATA)
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105
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428
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106 static void
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107 get_lim_data (void)
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108 {
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2132
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109 lim_data = (unsigned long) -1;
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428
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110 }
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2263
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111
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112 #elif defined(HAVE_GETRLIMIT)
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113
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114 static void
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115 get_lim_data (void)
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116 {
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117 struct rlimit XXrlimit;
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428
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118
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2263
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119 getrlimit (RLIMIT_DATA, &XXrlimit);
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120 #ifdef RLIM_INFINITY
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121 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
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122 #else
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123 lim_data = XXrlimit.rlim_cur; /* soft limit */
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124 #endif
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125 }
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126
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127 #elif defined(HAVE_ULIMIT)
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428
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128
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129 static void
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130 get_lim_data (void)
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131 {
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2132
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132 lim_data = (unsigned long) -1;
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428
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133
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134 /* Use the ulimit call, if we seem to have it. */
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2132
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135 #if !defined (ULIMIT_BREAK_VALUE)
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428
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136 lim_data = ulimit (3, 0);
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137 #endif
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138
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139 /* If that didn't work, just use the macro's value. */
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140 #ifdef ULIMIT_BREAK_VALUE
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2132
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141 if (lim_data == (unsigned long) -1)
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428
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142 lim_data = ULIMIT_BREAK_VALUE;
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143 #endif
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144
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145 lim_data -= (long) data_space_start;
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146 }
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147
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2263
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148 #elif defined(WIN32_NATIVE)
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428
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149
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150 static void
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151 get_lim_data (void)
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152 {
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153 extern unsigned long data_region_size;
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154 lim_data = data_region_size;
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155 }
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156
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2263
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157 #elif defined(HAVE_VLIMIT)
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428
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158
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159 static void
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160 get_lim_data (void)
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161 {
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162 lim_data = vlimit (LIM_DATA, -1);
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163 }
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164
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165 #else
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2263
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166 #error Cannot determine an implementation of get_lim_data().
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167 #endif /* not HAVE_VLIMIT */
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428
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168
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440
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169 #endif /* INCLUDED_mem_limits_h_ */
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