1 | /*
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2 | ** state.c - mrb_state open/close functions
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3 | **
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4 | ** See Copyright Notice in mruby.h
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5 | */
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6 |
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7 | #include <stdlib.h>
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8 | #include <string.h>
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9 | #include <mruby.h>
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10 | #include <mruby/irep.h>
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11 | #include <mruby/variable.h>
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12 | #include <mruby/debug.h>
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13 | #include <mruby/string.h>
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14 | #include <mruby/class.h>
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15 |
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16 | void mrb_init_core(mrb_state*);
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17 | void mrb_init_mrbgems(mrb_state*);
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18 |
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19 | void mrb_gc_init(mrb_state*, mrb_gc *gc);
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20 | void mrb_gc_destroy(mrb_state*, mrb_gc *gc);
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21 |
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22 | MRB_API mrb_state*
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23 | mrb_open_core(mrb_allocf f, void *ud)
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24 | {
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25 | static const mrb_state mrb_state_zero = { 0 };
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26 | static const struct mrb_context mrb_context_zero = { 0 };
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27 | mrb_state *mrb;
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28 |
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29 | if (f == NULL) f = mrb_default_allocf;
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30 | mrb = (mrb_state *)(f)(NULL, NULL, sizeof(mrb_state), ud);
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31 | if (mrb == NULL) return NULL;
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32 |
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33 | *mrb = mrb_state_zero;
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34 | mrb->allocf_ud = ud;
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35 | mrb->allocf = f;
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36 | mrb->atexit_stack_len = 0;
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37 |
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38 | mrb_gc_init(mrb, &mrb->gc);
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39 | mrb->c = (struct mrb_context*)mrb_malloc(mrb, sizeof(struct mrb_context));
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40 | *mrb->c = mrb_context_zero;
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41 | mrb->root_c = mrb->c;
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42 |
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43 | mrb_init_core(mrb);
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44 |
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45 | return mrb;
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46 | }
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47 |
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48 | void*
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49 | mrb_default_allocf(mrb_state *mrb, void *p, size_t size, void *ud)
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50 | {
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51 | if (size == 0) {
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52 | free(p);
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53 | return NULL;
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54 | }
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55 | else {
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56 | return realloc(p, size);
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57 | }
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58 | }
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59 |
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60 | MRB_API mrb_state*
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61 | mrb_open(void)
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62 | {
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63 | mrb_state *mrb = mrb_open_allocf(mrb_default_allocf, NULL, FALSE);
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64 |
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65 | return mrb;
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66 | }
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67 |
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68 | MRB_API mrb_state*
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69 | mrb_open_allocf(mrb_allocf f, void *ud, mrb_bool disable_gems)
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70 | {
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71 | mrb_state *mrb = mrb_open_core(f, ud);
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72 |
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73 | if (mrb == NULL) {
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74 | return NULL;
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75 | }
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76 |
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77 | if (!disable_gems) {
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78 | #ifndef DISABLE_GEMS
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79 | mrb_init_mrbgems(mrb);
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80 | mrb_gc_arena_restore(mrb, 0);
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81 | #endif
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82 | }
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83 | return mrb;
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84 | }
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85 |
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86 | void mrb_free_symtbl(mrb_state *mrb);
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87 |
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88 | void
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89 | mrb_irep_incref(mrb_state *mrb, mrb_irep *irep)
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90 | {
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91 | irep->refcnt++;
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92 | }
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93 |
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94 | void
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95 | mrb_irep_decref(mrb_state *mrb, mrb_irep *irep)
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96 | {
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97 | irep->refcnt--;
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98 | if (irep->refcnt == 0) {
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99 | mrb_irep_free(mrb, irep);
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100 | }
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101 | }
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102 |
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103 | void
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104 | mrb_irep_cutref(mrb_state *mrb, mrb_irep *irep)
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105 | {
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106 | mrb_irep *tmp;
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107 | int i;
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108 |
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109 | for (i=0; i<irep->rlen; i++) {
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110 | tmp = irep->reps[i];
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111 | irep->reps[i] = NULL;
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112 | if (tmp) mrb_irep_decref(mrb, tmp);
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113 | }
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114 | }
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115 |
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116 | void
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117 | mrb_irep_free(mrb_state *mrb, mrb_irep *irep)
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118 | {
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119 | int i;
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120 |
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121 | if (!(irep->flags & MRB_ISEQ_NO_FREE))
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122 | mrb_free(mrb, (void*)irep->iseq);
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123 | if (irep->pool) for (i=0; i<irep->plen; i++) {
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124 | if (mrb_string_p(irep->pool[i])) {
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125 | mrb_gc_free_str(mrb, RSTRING(irep->pool[i]));
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126 | mrb_free(mrb, mrb_obj_ptr(irep->pool[i]));
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127 | }
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128 | #if defined(MRB_WORD_BOXING) && !defined(MRB_WITHOUT_FLOAT)
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129 | else if (mrb_float_p(irep->pool[i])) {
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130 | mrb_free(mrb, mrb_obj_ptr(irep->pool[i]));
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131 | }
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132 | #endif
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133 | }
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134 | mrb_free(mrb, irep->pool);
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135 | mrb_free(mrb, irep->syms);
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136 | for (i=0; i<irep->rlen; i++) {
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137 | if (irep->reps[i])
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138 | mrb_irep_decref(mrb, irep->reps[i]);
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139 | }
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140 | mrb_free(mrb, irep->reps);
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141 | mrb_free(mrb, irep->lv);
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142 | mrb_debug_info_free(mrb, irep->debug_info);
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143 | mrb_free(mrb, irep);
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144 | }
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145 |
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146 | void mrb_free_backtrace(mrb_state *mrb);
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147 |
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148 | MRB_API void
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149 | mrb_free_context(mrb_state *mrb, struct mrb_context *c)
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150 | {
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151 | if (!c) return;
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152 | mrb_free(mrb, c->stbase);
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153 | mrb_free(mrb, c->cibase);
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154 | mrb_free(mrb, c->rescue);
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155 | mrb_free(mrb, c->ensure);
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156 | mrb_free(mrb, c);
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157 | }
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158 |
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159 | MRB_API void
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160 | mrb_close(mrb_state *mrb)
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161 | {
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162 | if (!mrb) return;
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163 | if (mrb->atexit_stack_len > 0) {
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164 | mrb_int i;
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165 | for (i = mrb->atexit_stack_len; i > 0; --i) {
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166 | mrb->atexit_stack[i - 1](mrb);
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167 | }
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168 | #ifndef MRB_FIXED_STATE_ATEXIT_STACK
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169 | mrb_free(mrb, mrb->atexit_stack);
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170 | #endif
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171 | }
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172 |
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173 | /* free */
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174 | mrb_gc_destroy(mrb, &mrb->gc);
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175 | mrb_free_context(mrb, mrb->root_c);
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176 | mrb_gc_free_gv(mrb);
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177 | mrb_free_symtbl(mrb);
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178 | mrb_free(mrb, mrb);
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179 | }
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180 |
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181 | MRB_API mrb_irep*
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182 | mrb_add_irep(mrb_state *mrb)
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183 | {
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184 | static const mrb_irep mrb_irep_zero = { 0 };
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185 | mrb_irep *irep;
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186 |
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187 | irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
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188 | *irep = mrb_irep_zero;
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189 | irep->refcnt = 1;
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190 |
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191 | return irep;
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192 | }
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193 |
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194 | MRB_API mrb_value
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195 | mrb_top_self(mrb_state *mrb)
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196 | {
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197 | return mrb_obj_value(mrb->top_self);
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198 | }
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199 |
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200 | MRB_API void
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201 | mrb_state_atexit(mrb_state *mrb, mrb_atexit_func f)
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202 | {
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203 | #ifdef MRB_FIXED_STATE_ATEXIT_STACK
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204 | if (mrb->atexit_stack_len + 1 > MRB_FIXED_STATE_ATEXIT_STACK_SIZE) {
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205 | mrb_raise(mrb, E_RUNTIME_ERROR, "exceeded fixed state atexit stack limit");
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206 | }
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207 | #else
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208 | size_t stack_size;
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209 |
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210 | stack_size = sizeof(mrb_atexit_func) * (mrb->atexit_stack_len + 1);
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211 | if (mrb->atexit_stack_len == 0) {
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212 | mrb->atexit_stack = (mrb_atexit_func*)mrb_malloc(mrb, stack_size);
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213 | }
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214 | else {
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215 | mrb->atexit_stack = (mrb_atexit_func*)mrb_realloc(mrb, mrb->atexit_stack, stack_size);
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216 | }
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217 | #endif
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218 |
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219 | mrb->atexit_stack[mrb->atexit_stack_len++] = f;
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220 | }
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