Mercurial > repos > rhope
annotate runtime/object.c @ 97:fa437d23bb24
fix memory corruption bug
author | Mike Pavone <pavone@retrodev.com> |
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date | Tue, 03 Aug 2010 22:38:25 -0400 |
parents | 04baa003de5a |
children | a68e6828d896 |
rev | line source |
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1 #include "object.h" |
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2 #include "builtin.h" |
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3 #include <stdlib.h> |
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4 #include <string.h> |
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5 #include <stdio.h> |
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6 #include "fixed_alloc.h" |
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7 |
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8 blueprint ** registered_types = NULL; |
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9 uint32_t max_registered_type = 0; |
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10 uint32_t type_storage = 0; |
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11 |
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12 mem_manager * manager = NULL; |
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13 /* |
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14 |
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15 returntype call_method(uint32_t methodid, calldata * params) |
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16 { |
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17 int i; |
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18 blueprint * bp = get_blueprint(params->params[0]); |
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19 if(methodid >= bp->first_methodid && methodid < bp->last_methodid && bp->method_lookup[methodid - bp->first_methodid]) |
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20 { |
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21 params->tail_func = bp->method_lookup[methodid - bp->first_methodid]; |
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22 return TAIL_RETURN; |
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23 } else { |
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24 if(METHOD_MISSING >= bp->first_methodid && METHOD_MISSING < bp->last_methodid && bp->method_lookup[METHOD_MISSING - bp->first_methodid]) |
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25 { |
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26 params->tail_func = bp->method_lookup[METHOD_MISSING - bp->first_methodid]; |
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27 return TAIL_RETURN; |
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28 } else { |
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29 //TODO: Add useful info to exception |
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30 for(i = 0; i < params->num_params; ++i) |
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31 release_ref(params->params[i]); |
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32 params->params[0] = new_object(TYPE_METHODMISSINGEXCEPTION); |
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33 return EXCEPTION_RETURN; |
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34 } |
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35 } |
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36 } |
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37 |
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38 returntype set_field(uint32_t setfieldid, calldata * params) |
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39 { |
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40 int i; |
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41 blueprint * bp = get_blueprint(params->params[0]); |
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42 if(setfieldid >= bp->first_setfieldid && setfieldid < bp->last_setfieldid && bp->setter_lookup[setfieldid - bp->first_setfieldid]) |
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43 { |
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44 params->tail_func = bp->setter_lookup[setfieldid - bp->first_setfieldid]; |
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45 return TAIL_RETURN; |
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46 } else { |
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47 if(METHOD_SETFIELDMISSING >= bp->first_setfieldid && METHOD_SETFIELDMISSING < bp->last_setfieldid && bp->method_lookup[METHOD_SETFIELDMISSING - bp->first_methodid]) |
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48 { |
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49 params->tail_func = bp->method_lookup[METHOD_SETFIELDMISSING - bp->first_methodid]; |
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50 params->original_methodid = setfieldid; |
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51 return TAIL_RETURN; |
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52 } else { |
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53 //TODO: Add useful info to exception |
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54 for(i = 0; i < params->num_params; ++i) |
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55 release_ref(params->params[i]); |
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56 params->params[0] = new_object(TYPE_FIELDMISSINGEXCEPTION); |
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57 return EXCEPTION_RETURN; |
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58 } |
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59 } |
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60 } |
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61 |
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62 |
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63 returntype get_field(uint32_t getfieldid, calldata * params) |
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64 { |
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65 int i; |
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66 blueprint * bp = get_blueprint(params->params[0]); |
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67 if(getfieldid >= bp->first_getfieldid && getfieldid < bp->last_getfieldid && bp->getter_lookup[getfieldid - bp->first_getfieldid]) |
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68 { |
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69 params->tail_func = bp->getter_lookup[getfieldid - bp->first_getfieldid]; |
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70 return TAIL_RETURN; |
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71 } else { |
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72 if(METHOD_GETFIELDMISSING >= bp->first_getfieldid && METHOD_GETFIELDMISSING < bp->last_getfieldid && bp->method_lookup[METHOD_GETFIELDMISSING - bp->first_methodid]) |
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73 { |
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74 params->tail_func = bp->method_lookup[METHOD_GETFIELDMISSING - bp->first_methodid]; |
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75 params->original_methodid = getfieldid; |
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76 return TAIL_RETURN; |
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77 } else { |
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78 //TODO: Add useful info to exception |
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79 for(i = 0; i < params->num_params; ++i) |
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80 release_ref(params->params[i]); |
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81 params->params[0] = new_object(TYPE_FIELDMISSINGEXCEPTION); |
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82 return EXCEPTION_RETURN; |
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83 } |
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84 } |
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85 } |
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86 |
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87 returntype convert_to(uint32_t convertto, calldata * params) |
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88 { |
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89 int i; |
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90 blueprint * bp = get_blueprint(params->params[0]); |
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91 if(convertto >= bp->first_convertto && convertto < bp->last_convertto && bp->convert_to[convertto]) |
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92 { |
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93 params->tail_func = bp->convert_to[convertto - bp->first_convertto]; |
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94 return TAIL_RETURN; |
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95 } else { |
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96 return NO_CONVERSION; |
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97 } |
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98 } |
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99 |
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100 returntype convert_from(uint32_t convertfrom, calldata * params) |
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101 { |
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102 int i; |
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103 blueprint * bp = registered_types[convertfrom]; |
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104 if(convertfrom >= bp->first_convertfrom && convertfrom < bp->last_convertfrom && bp->convert_from[convertfrom]) |
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105 { |
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106 params->tail_func = bp->convert_from[convertfrom - bp->first_convertfrom]; |
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107 return TAIL_RETURN; |
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108 } else { |
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109 return NO_CONVERSION; |
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110 } |
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111 } |
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112 |
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113 returntype coerce_value(uint32_t type, calldata * params) |
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114 { |
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115 int i; |
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116 blueprint * bp = get_blueprint(params->params[0]); |
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117 if(bp == registered_types[type]) |
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118 return NORMAL_RETURN; |
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119 if(convert_to(type, params) == TAIL_RETURN) |
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120 return TAIL_RETURN; |
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121 if(convert_from(type, params) == TAIL_RETURN) |
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122 return TAIL_RETURN; |
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123 //TODO: Add useful info to exception |
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124 for(i = 0; i < params->num_params; ++i) |
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125 release_ref(params->params[i]); |
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126 params->params[0] = new_object(TYPE_WRONGTYPEEXCEPTION); |
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127 return EXCEPTION_RETURN; |
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128 }*/ |
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129 |
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130 object * alloc_object(blueprint * bp) |
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131 { |
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132 return falloc(bp->boxed_size, manager); |
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133 //return malloc(bp->boxed_size); |
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134 } |
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135 |
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136 void dealloc_object(blueprint * bp, object * obj) |
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137 { |
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138 ffree(obj, bp->boxed_size, manager); |
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139 } |
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140 |
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141 object * new_object(uint32_t type) |
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142 { |
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143 blueprint * bp; |
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144 object * ret; |
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145 if(type >= max_registered_type || !registered_types[type]) |
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146 return NULL; |
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147 bp = registered_types[type]; |
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148 return new_object_bp(bp); |
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149 } |
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150 |
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151 object * new_object_bp(blueprint * bp) |
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152 { |
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153 object * ret; |
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154 ret = alloc_object(bp); |
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155 if(ret) |
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156 { |
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157 ret->bprint = bp; |
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158 rh_atomic_set(ret, refcount, 1); |
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159 memset(((char *)ret) + sizeof(object), '\0', bp->size); |
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160 bp->init(ret); |
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161 } else { |
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162 fprintf(stderr, "Could not allocate new object with size %d\n", bp->boxed_size); |
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163 } |
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164 return ret; |
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165 } |
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166 |
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167 multisize * new_multisize(uint32_t type, uint32_t size) |
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168 { |
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169 blueprint *bp; |
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170 multisize * ret; |
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171 if(type >= max_registered_type || !registered_types[type]) |
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172 return NULL; |
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173 ret = falloc(sizeof(multisize) + size, manager); |
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174 if(ret) |
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175 { |
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176 bp = registered_types[type]; |
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177 ret->base.bprint = bp; |
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178 ret->size = size; |
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179 rh_atomic_set(&(ret->base), refcount, 1); |
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180 memset(((char *)ret) + sizeof(multisize), '\0', size); |
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181 bp->init((object *)ret); |
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182 } |
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183 return ret; |
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184 } |
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185 |
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186 object * copy_object(object * tocopy) |
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187 { |
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188 object * copy; |
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189 multisize * mcopy, *mtocopy; |
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190 blueprint * bp; |
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191 if(rh_atomic_get(tocopy, refcount) == 1) |
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192 return tocopy; |
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193 bp = get_blueprint(tocopy); |
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194 if(bp->size < 0) { |
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195 mtocopy = (multisize *)tocopy; |
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196 mcopy = falloc(sizeof(multisize) + mtocopy->size, manager); |
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197 mcopy->size = mtocopy->size; |
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198 memcpy(((char *)mcopy)+sizeof(multisize), ((char *)mtocopy)+sizeof(multisize), mtocopy->size); |
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199 copy = (object *)mcopy; |
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200 } else { |
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201 copy = alloc_object(bp); |
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202 memcpy(((char *)copy) + sizeof(object), ((char *)tocopy)+sizeof(object), bp->size); |
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203 } |
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204 copy->bprint = bp; |
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205 rh_atomic_set(copy, refcount, 1); |
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206 bp->copy(copy); |
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207 release_ref(tocopy); |
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208 return copy; |
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209 } |
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210 |
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211 object * naked_to_boxed(uint32_t type, void * rawdata) |
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212 { |
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213 object * dest; |
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214 blueprint * bp = get_blueprint_byid(type); |
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215 if(!bp->boxed_size) |
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216 return NULL; //We don't know how big a naked multi-size object is so we can't do anything with it |
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217 dest = alloc_object(bp); |
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218 memcpy(((char *)dest) + sizeof(object), rawdata, bp->size); |
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219 dest->bprint = bp; |
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220 rh_atomic_set(dest, refcount, 1); |
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221 bp->copy(dest); |
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222 return dest; |
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223 } |
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224 |
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225 void boxed_to_naked(object * src, void * dest) |
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226 { |
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227 blueprint * bp = get_blueprint(src); |
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228 if(!bp->boxed_size) |
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229 return; //We don't know how big a naked multi-size object is so we can't do anything with it |
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230 memcpy(dest, ((char *)src) + sizeof(object), bp->size); |
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231 bp->copy(src); |
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232 } |
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233 |
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234 void release_ref(object * obj) |
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235 { |
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236 if(rh_atomic_sub_testzero(obj, refcount, 1)) |
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237 get_blueprint(obj)->free(obj); |
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238 } |
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239 |
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240 void check_type_storage(type) |
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241 { |
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242 uint32_t type_storage_temp; |
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243 blueprint ** temp; |
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244 if(type >= type_storage) |
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245 if(type_storage) |
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246 { |
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247 type_storage_temp = (type + (type_storage >> 1)); |
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248 temp = realloc(registered_types, type_storage_temp * sizeof(blueprint *)); |
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249 if(temp) |
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250 { |
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251 registered_types = temp; |
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252 memset(registered_types + type_storage, '\0', (type_storage_temp - type_storage) * sizeof(blueprint *)); |
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253 type_storage = type_storage_temp; |
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254 } |
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255 else |
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256 { |
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257 free(registered_types); |
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258 fprintf(stderr, "Couldn't allocate %d bytes for type storage array\n", type_storage_temp * sizeof(blueprint *)); |
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259 exit(-1); |
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260 } |
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261 } else { |
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262 |
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263 if(type < INITIAL_TYPE_STORAGE) |
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264 type_storage =INITIAL_TYPE_STORAGE; |
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265 else |
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266 type_storage = type + 8; |
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267 registered_types = malloc(type_storage * sizeof(blueprint *)); |
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268 if(registered_types) |
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269 memset(registered_types, '\0', type_storage * sizeof(blueprint *)); |
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270 else |
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271 { |
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272 fprintf(stderr, "Couldn't allocate %d bytes for type storage array\n", type_storage * sizeof(blueprint *)); |
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273 exit(-1); |
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274 } |
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275 |
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276 } |
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277 } |
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278 |
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279 void default_action(object * obj) |
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280 { |
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281 } |
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282 |
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283 void normal_free(object * obj) |
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284 { |
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285 blueprint * bp = get_blueprint(obj); |
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286 if(bp->cleanup) |
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287 bp->cleanup(obj); |
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288 ffree(obj, bp->boxed_size, manager); |
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289 } |
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290 |
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291 void multi_free(object * obj) |
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292 { |
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293 multisize * multi = (multisize *)obj; |
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294 blueprint * bp = get_blueprint(obj); |
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295 if(bp->cleanup) |
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296 bp->cleanup(obj); |
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297 ffree(multi, sizeof(multisize) + multi->size, manager); |
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298 } |
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299 |
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300 blueprint * new_blueprint(uint32_t type, int32_t size, special_func init, special_func copy, special_func cleanup) |
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301 { |
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302 blueprint * bp = malloc(sizeof(blueprint)); |
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303 //dirty hack!, move elsewhere |
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304 if (!manager) { |
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305 fixed_alloc_init(); |
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306 manager = new_mem_manager(); |
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307 } |
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308 if(bp) |
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309 { |
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310 bp->size = size; |
41
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311 bp->boxed_size = size >= 0 ? size + sizeof(object) : 0; |
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312 bp->method_lookup = bp->getter_lookup = bp->setter_lookup = bp->convert_to = bp->convert_from = NULL; |
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313 bp->type_id = type; |
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314 bp->init = init ? init : default_action; |
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315 bp->copy = copy ? copy : default_action; |
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316 bp->cleanup = cleanup ? cleanup : default_action; |
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317 bp->free = size >= 0 ? normal_free : multi_free; |
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318 bp->first_methodid = bp->last_methodid = bp->first_getfieldid = bp->last_getfieldid = bp->first_setfieldid = bp->last_setfieldid = bp->first_convertto = bp->last_convertto = bp->first_convertfrom = bp->last_convertfrom = 0; |
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319 //TODO: Handle names |
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320 bp->name = NULL; |
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321 } |
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322 return bp; |
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323 } |
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324 |
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325 blueprint * register_type_byid(uint32_t type, int32_t size, special_func init, special_func copy, special_func cleanup) |
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326 { |
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327 check_type_storage(type); |
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328 if(registered_types[type]) |
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329 return registered_types[type]; |
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330 registered_types[type] = new_blueprint(type, size, init, copy, cleanup); |
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331 if(!registered_types[type]) |
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332 { |
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333 fputs("Couldn't allocate new object blueprint\n", stderr); |
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334 exit(-1); |
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335 } |
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336 if(type >= max_registered_type) |
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337 max_registered_type = type + 1; |
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338 return registered_types[type]; |
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339 } |
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340 |
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341 void add_method(blueprint * bp, uint32_t methodid, rhope_func impl) |
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342 { |
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343 rhope_func * temp; |
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344 if(methodid < 1) { |
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345 fputs("Attempt to add a method with an ID < 1\n", stderr); |
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346 exit(-1); |
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347 } |
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348 if (!bp->method_lookup) |
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349 { |
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350 bp->method_lookup = malloc(sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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351 if(!bp->method_lookup) { |
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352 fprintf(stderr, "Couldn't allocate %d bytes for method lookup table\n", sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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353 exit(-1); |
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354 } |
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355 if(BELOW_INITIAL_METHOD > methodid) { |
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356 bp->first_methodid = 1; |
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357 bp->last_methodid = 1+INITIAL_METHOD_LOOKUP; |
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358 } else { |
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359 bp->first_methodid = methodid - BELOW_INITIAL_METHOD; |
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360 bp->last_methodid = bp->first_methodid + INITIAL_METHOD_LOOKUP; |
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361 } |
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362 memset(bp->method_lookup, '\0', sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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363 } else { |
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364 if (methodid < bp->first_methodid) { |
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365 temp = bp->method_lookup; |
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366 //Note: if this gets changed to generating an exception on failure, we need to restore the original buffer |
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367 bp->method_lookup = malloc(sizeof(rhope_func) * (bp->last_methodid-methodid)); |
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368 if(!bp->method_lookup) { |
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369 fprintf(stderr, "Couldn't allocate %d bytes for method lookup table\n", sizeof(rhope_func) * (bp->last_methodid-methodid)); |
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370 exit(-1); |
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371 } |
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372 memset(bp->method_lookup, '\0', (bp->first_methodid-methodid) * sizeof(rhope_func)); |
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373 memcpy(bp->method_lookup + bp->first_methodid-methodid, temp, (bp->last_methodid-bp->first_methodid)*sizeof(rhope_func)); |
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374 free(temp); |
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375 bp->first_methodid = methodid; |
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376 } else if(methodid >= bp->last_methodid) { |
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377 //Note: if this gets changed to generating an exception on failure, we need to restore the original buffer |
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378 bp->method_lookup = realloc(bp->method_lookup, (methodid+1-bp->first_methodid) * sizeof(rhope_func)); |
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379 if(!bp->method_lookup) { |
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380 fprintf(stderr, "Couldn't resize method lookup table to %d bytes\n", (methodid+1-bp->first_methodid) * sizeof(rhope_func)); |
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381 exit(-1); |
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382 } |
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383 memset(bp->method_lookup+bp->last_methodid, '\0', (methodid+1)-bp->last_methodid); |
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384 bp->last_methodid = methodid+1; |
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385 } |
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386 } |
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387 bp->method_lookup[methodid-bp->first_methodid] = impl; |
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388 } |
30
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389 |
34
df038cef648b
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390 void add_getter(blueprint * bp, uint32_t getfieldid, rhope_func impl) |
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391 { |
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392 rhope_func * temp; |
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393 if(getfieldid < 1) { |
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394 fputs("Attempt to add a method with an ID < 1\n", stderr); |
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395 exit(-1); |
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396 } |
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397 if (!bp->getter_lookup) |
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398 { |
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399 bp->getter_lookup = malloc(sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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400 if(!bp->getter_lookup) { |
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401 fprintf(stderr, "Couldn't allocate %d bytes for getter lookup table\n", sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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402 exit(-1); |
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403 } |
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404 if(BELOW_INITIAL_METHOD > getfieldid) { |
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405 bp->first_getfieldid = 1; |
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406 bp->last_getfieldid = 1+INITIAL_METHOD_LOOKUP; |
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407 } else { |
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408 bp->first_getfieldid = getfieldid - BELOW_INITIAL_METHOD; |
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409 bp->last_getfieldid = bp->first_getfieldid + INITIAL_METHOD_LOOKUP; |
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410 } |
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411 memset(bp->getter_lookup, '\0', sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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412 } else { |
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413 if (getfieldid < bp->first_getfieldid) { |
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414 temp = bp->getter_lookup; |
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415 //Note: if this gets changed to generating an exception on failure, we need to restore the original buffer |
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416 bp->getter_lookup = malloc(sizeof(rhope_func) * (bp->last_getfieldid-getfieldid)); |
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417 if(!bp->getter_lookup) { |
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418 fprintf(stderr, "Couldn't allocate %d bytes for getter lookup table\n", sizeof(rhope_func) * (bp->last_getfieldid-getfieldid)); |
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419 exit(-1); |
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420 } |
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421 memset(bp->getter_lookup, '\0', (bp->first_getfieldid-getfieldid) * sizeof(rhope_func)); |
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422 memcpy(bp->getter_lookup + bp->first_getfieldid-getfieldid, temp, (bp->last_getfieldid-bp->first_getfieldid)*sizeof(rhope_func)); |
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423 free(temp); |
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424 bp->first_getfieldid = getfieldid; |
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425 } else if(getfieldid >= bp->last_getfieldid) { |
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426 //Note: if this gets changed to generating an exception on failure, we need to restore the original buffer |
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427 bp->getter_lookup = realloc(bp->getter_lookup, (getfieldid+1-bp->first_getfieldid) * sizeof(rhope_func)); |
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428 if(!bp->getter_lookup) { |
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429 fprintf(stderr, "Couldn't resize getter lookup table to %d bytes\n", (getfieldid+1-bp->first_getfieldid) * sizeof(rhope_func)); |
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430 exit(-1); |
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431 } |
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432 memset(bp->getter_lookup+bp->last_getfieldid, '\0', (getfieldid+1)-bp->last_getfieldid); |
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433 bp->last_getfieldid = getfieldid+1; |
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434 } |
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435 } |
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436 bp->getter_lookup[getfieldid-bp->first_getfieldid] = impl; |
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437 } |
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438 |
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439 void add_setter(blueprint * bp, uint32_t setfieldid, rhope_func impl) |
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440 { |
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441 rhope_func * temp; |
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442 if(setfieldid < 1) { |
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443 fputs("Attempt to add a method with an ID < 1\n", stderr); |
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444 exit(-1); |
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445 } |
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446 if (!bp->setter_lookup) |
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447 { |
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448 bp->setter_lookup = malloc(sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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449 if(!bp->setter_lookup) { |
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450 fprintf(stderr, "Couldn't allocate %d bytes for setter lookup table\n", sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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451 exit(-1); |
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452 } |
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453 if(BELOW_INITIAL_METHOD > setfieldid) { |
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454 bp->first_setfieldid = 1; |
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455 bp->last_setfieldid = 1+INITIAL_METHOD_LOOKUP; |
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456 } else { |
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457 bp->first_setfieldid = setfieldid - BELOW_INITIAL_METHOD; |
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458 bp->last_setfieldid = bp->first_setfieldid + INITIAL_METHOD_LOOKUP; |
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459 } |
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460 memset(bp->setter_lookup, '\0', sizeof(rhope_func) * INITIAL_METHOD_LOOKUP); |
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461 } else { |
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462 if (setfieldid < bp->first_setfieldid) { |
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463 temp = bp->setter_lookup; |
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464 //Note: if this sets changed to generating an exception on failure, we need to restore the original buffer |
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465 bp->setter_lookup = malloc(sizeof(rhope_func) * (bp->last_setfieldid-setfieldid)); |
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466 if(!bp->setter_lookup) { |
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467 fprintf(stderr, "Couldn't allocate %d bytes for setter lookup table\n", sizeof(rhope_func) * (bp->last_setfieldid-setfieldid)); |
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468 exit(-1); |
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469 } |
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470 memset(bp->setter_lookup, '\0', (bp->first_setfieldid-setfieldid) * sizeof(rhope_func)); |
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471 memcpy(bp->setter_lookup + bp->first_setfieldid-setfieldid, temp, (bp->last_setfieldid-bp->first_setfieldid)*sizeof(rhope_func)); |
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472 free(temp); |
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473 bp->first_setfieldid = setfieldid; |
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474 } else if(setfieldid >= bp->last_setfieldid) { |
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475 //Note: if this sets changed to generating an exception on failure, we need to restore the original buffer |
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476 bp->setter_lookup = realloc(bp->setter_lookup, (setfieldid+1-bp->first_setfieldid) * sizeof(rhope_func)); |
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477 if(!bp->setter_lookup) { |
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478 fprintf(stderr, "Couldn't resize setter lookup table to %d bytes\n", (setfieldid+1-bp->first_setfieldid) * sizeof(rhope_func)); |
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479 exit(-1); |
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480 } |
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481 memset(bp->setter_lookup+bp->last_setfieldid, '\0', (setfieldid+1)-bp->last_setfieldid); |
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482 bp->last_setfieldid = setfieldid+1; |
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483 } |
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484 } |
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485 bp->setter_lookup[setfieldid-bp->first_setfieldid] = impl; |
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486 } |
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487 |
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488 blueprint * get_blueprint_byid(uint32_t type) |
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489 { |
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490 if(type >= max_registered_type) |
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491 return NULL; |
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492 return registered_types[type]; |
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493 } |
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494 |