1 | /* GNU Objective C Runtime Miscellaneous |
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2 | Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. |
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3 | Contributed by Kresten Krab Thorup |
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4 | |
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5 | This file is part of GNU CC. |
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6 | |
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7 | GNU CC is free software; you can redistribute it and/or modify it |
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8 | under the terms of the GNU General Public License as published by the |
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9 | Free Software Foundation; either version 2, or (at your option) any |
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10 | later version. |
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11 | |
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12 | GNU CC is distributed in the hope that it will be useful, but WITHOUT |
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13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 | for more details. |
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16 | |
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17 | You should have received a copy of the GNU General Public License |
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18 | along with GNU CC; see the file COPYING. If not, write to the Free |
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19 | Software Foundation, 59 Temple Place - Suite 330, |
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20 | Boston, MA 02111-1307, USA. */ |
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21 | |
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22 | /* As a special exception, if you link this library with files compiled with |
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23 | GCC to produce an executable, this does not cause the resulting executable |
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24 | to be covered by the GNU General Public License. This exception does not |
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25 | however invalidate any other reasons why the executable file might be |
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26 | covered by the GNU General Public License. */ |
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27 | |
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28 | #define __USE_FIXED_PROTOTYPES__ |
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29 | #include <stdlib.h> |
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30 | #include "runtime.h" |
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31 | |
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32 | /* |
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33 | ** Error handler function |
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34 | ** NULL so that default is to just print to stderr |
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35 | */ |
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36 | static objc_error_handler _objc_error_handler = NULL; |
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37 | |
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38 | /* Trigger an objc error */ |
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39 | void |
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40 | objc_error(id object, int code, const char* fmt, ...) |
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41 | { |
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42 | va_list ap; |
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43 | |
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44 | va_start(ap, fmt); |
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45 | objc_verror(object, code, fmt, ap); |
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46 | va_end(ap); |
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47 | } |
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48 | |
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49 | /* Trigger an objc error */ |
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50 | void |
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51 | objc_verror(id object, int code, const char* fmt, va_list ap) |
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52 | { |
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53 | BOOL result = NO; |
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54 | |
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55 | /* Call the error handler if its there |
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56 | Otherwise print to stderr */ |
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57 | if (_objc_error_handler) |
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58 | result = (*_objc_error_handler)(object, code, fmt, ap); |
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59 | else |
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60 | vfprintf (stderr, fmt, ap); |
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61 | |
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62 | /* Continue if the error handler says its ok |
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63 | Otherwise abort the program */ |
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64 | if (result) |
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65 | return; |
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66 | else |
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67 | abort(); |
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68 | } |
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69 | |
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70 | /* Set the error handler */ |
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71 | objc_error_handler |
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72 | objc_set_error_handler(objc_error_handler func) |
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73 | { |
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74 | objc_error_handler temp = _objc_error_handler; |
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75 | _objc_error_handler = func; |
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76 | return temp; |
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77 | } |
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78 | |
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79 | /* |
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80 | ** Standard functions for memory allocation and disposal. |
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81 | ** Users should use these functions in their ObjC programs so |
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82 | ** that they work properly with garbage collectors as well as |
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83 | ** can take advantage of the exception/error handling available. |
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84 | */ |
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85 | |
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86 | void * |
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87 | objc_malloc(size_t size) |
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88 | { |
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89 | void* res = (void*) (*_objc_malloc)(size); |
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90 | if(!res) |
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91 | objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n"); |
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92 | return res; |
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93 | } |
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94 | |
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95 | void * |
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96 | objc_atomic_malloc(size_t size) |
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97 | { |
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98 | void* res = (void*) (*_objc_atomic_malloc)(size); |
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99 | if(!res) |
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100 | objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n"); |
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101 | return res; |
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102 | } |
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103 | |
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104 | void * |
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105 | objc_valloc(size_t size) |
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106 | { |
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107 | void* res = (void*) (*_objc_valloc)(size); |
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108 | if(!res) |
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109 | objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n"); |
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110 | return res; |
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111 | } |
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112 | |
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113 | void * |
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114 | objc_realloc(void *mem, size_t size) |
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115 | { |
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116 | void* res = (void*) (*_objc_realloc)(mem, size); |
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117 | if(!res) |
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118 | objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n"); |
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119 | return res; |
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120 | } |
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121 | |
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122 | void * |
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123 | objc_calloc(size_t nelem, size_t size) |
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124 | { |
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125 | void* res = (void*) (*_objc_calloc)(nelem, size); |
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126 | if(!res) |
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127 | objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n"); |
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128 | return res; |
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129 | } |
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130 | |
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131 | void |
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132 | objc_free(void *mem) |
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133 | { |
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134 | (*_objc_free)(mem); |
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135 | } |
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136 | |
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137 | /* |
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138 | ** Hook functions for memory allocation and disposal. |
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139 | ** This makes it easy to substitute garbage collection systems |
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140 | ** such as Boehm's GC by assigning these function pointers |
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141 | ** to the GC's allocation routines. By default these point |
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142 | ** to the ANSI standard malloc, realloc, free, etc. |
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143 | ** |
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144 | ** Users should call the normal objc routines above for |
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145 | ** memory allocation and disposal within their programs. |
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146 | */ |
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147 | void *(*_objc_malloc)(size_t) = malloc; |
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148 | void *(*_objc_atomic_malloc)(size_t) = malloc; |
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149 | void *(*_objc_valloc)(size_t) = malloc; |
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150 | void *(*_objc_realloc)(void *, size_t) = realloc; |
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151 | void *(*_objc_calloc)(size_t, size_t) = calloc; |
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152 | void (*_objc_free)(void *) = free; |
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