1 | #include "exception.h" |
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2 | |
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3 | // Use: gcc -fexceptions -Wall -Werror -g exception.c test-main.c |
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4 | |
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5 | #include <stdio.h> |
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6 | #include <stdbool.h> |
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7 | |
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8 | // Translation Helpers: |
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9 | #define CLEANUP(function) \ |
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10 | struct __cleanup_hook __hidden_hook __attribute__((cleanup(function))) |
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11 | |
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12 | void __try_resume_node_new(struct __try_resume_node * node, |
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13 | _Bool (*handler)(exception except)) { |
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14 | node->next = shared_stack.top_resume; |
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15 | shared_stack.top_resume = node; |
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16 | node->try_to_handle = handler; |
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17 | } |
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18 | |
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19 | void __try_resume_node_delete(struct __try_resume_node * node) { |
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20 | shared_stack.top_resume = node->next; |
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21 | } |
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22 | |
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23 | // Local Print On Exit: |
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24 | struct raii_base_type { |
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25 | const char * area; |
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26 | }; |
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27 | |
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28 | void raii_dtor(struct raii_base_type * this) { |
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29 | printf("Exiting: %s\n", this->area); |
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30 | } |
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31 | |
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32 | #define raii_t __attribute__((cleanup(raii_dtor))) struct raii_base_type |
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33 | |
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34 | // =========================================================================== |
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35 | // Runtime code (post-translation). |
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36 | void terminate(int except_value) { |
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37 | raii_t a = {"terminate function"}; |
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38 | __throw_terminate(except_value); |
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39 | printf("terminate returned\n"); |
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40 | } |
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41 | |
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42 | void resume(int except_value) { |
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43 | raii_t a = {"resume function"}; |
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44 | __throw_resume(except_value); |
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45 | printf("resume returned\n"); |
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46 | } |
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47 | |
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48 | // Termination Test: Two handlers: no catch, catch |
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49 | void bar() { |
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50 | raii_t a = {"bar function"}; |
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51 | { |
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52 | void bar_try1() { |
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53 | terminate(4); |
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54 | } |
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55 | void bar_catch1(int index, exception except) { |
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56 | switch(except) { |
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57 | case 1: |
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58 | printf("bar caught exception 3.\n"); |
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59 | break; |
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60 | default: |
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61 | printf("INVALID INDEX in bar: %d (%d)\n", index, except); |
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62 | } |
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63 | } |
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64 | int bar_match1(exception except) { |
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65 | if (3 == except) { |
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66 | return 1; |
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67 | } else { |
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68 | return 0; |
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69 | } |
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70 | } |
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71 | __try_terminate(bar_try1, bar_catch1, bar_match1); |
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72 | } |
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73 | } |
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74 | |
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75 | void foo() { |
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76 | raii_t a = {"foo function"}; |
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77 | { |
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78 | void foo_try1() { |
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79 | bar(); |
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80 | } |
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81 | void foo_catch1(int index, exception except) { |
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82 | switch(index) { |
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83 | case 1: |
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84 | printf("foo caught exception 4.\n"); |
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85 | break; |
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86 | case 2: |
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87 | printf("foo caught exception 2.\n"); |
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88 | break; |
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89 | default: |
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90 | printf("INVALID INDEX in foo: %d (%d)\n", index, except); |
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91 | } |
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92 | } |
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93 | int foo_match1(exception except) { |
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94 | if (4 == except) { |
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95 | return 1; |
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96 | } else if (2 == except) { |
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97 | return 2; |
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98 | } else { |
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99 | return 0; |
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100 | } |
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101 | } |
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102 | __try_terminate(foo_try1, foo_catch1, foo_match1); |
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103 | } |
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104 | } |
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105 | |
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106 | // Resumption Two Handler Test: no catch, catch. |
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107 | void beta() { |
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108 | raii_t a = {"beta function"}; |
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109 | { |
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110 | bool beta_handle1(exception except) { |
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111 | if (3 == except) { |
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112 | printf("beta caught exception 3\n"); |
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113 | return true; |
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114 | } else { |
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115 | return false; |
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116 | } |
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117 | } |
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118 | struct __try_resume_node node |
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119 | __attribute__((cleanup(__try_resume_node_delete))); |
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120 | __try_resume_node_new(&node, beta_handle1); |
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121 | { |
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122 | resume(4); |
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123 | } |
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124 | } |
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125 | } |
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126 | void alpha() { |
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127 | raii_t a = {"alpha function"}; |
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128 | { |
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129 | bool alpha_handle1(exception except) { |
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130 | if (2 == except) { |
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131 | printf("alpha caught exception 2\n"); |
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132 | return true; |
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133 | } else if (4 == except) { |
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134 | printf("alpha caught exception 4\n"); |
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135 | return true; |
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136 | } else { |
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137 | return false; |
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138 | } |
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139 | } |
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140 | struct __try_resume_node node |
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141 | __attribute__((cleanup(__try_resume_node_delete))); |
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142 | __try_resume_node_new(&node, alpha_handle1); |
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143 | { |
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144 | beta(); |
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145 | } |
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146 | } |
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147 | } |
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148 | |
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149 | // Finally Test: |
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150 | void farewell() { |
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151 | { |
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152 | void farewell_finally1() { |
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153 | printf("See you next time\n"); |
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154 | } |
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155 | CLEANUP(farewell_finally1); |
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156 | { |
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157 | printf("jump out of farewell\n"); |
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158 | } |
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159 | } |
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160 | } |
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161 | |
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162 | // Resume-to-Terminate Test: |
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163 | void fallback() { |
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164 | //raii_t a = {"fallback function\n"}; |
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165 | { |
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166 | void fallback_try1() { |
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167 | resume(1); |
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168 | } |
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169 | void fallback_catch1(int index, exception except) { |
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170 | switch (index) { |
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171 | case 1: |
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172 | printf("fallback caught termination 1\n"); |
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173 | break; |
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174 | default: |
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175 | printf("INVALID INDEX in fallback: %d (%d)\n", index, except); |
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176 | } |
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177 | } |
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178 | int fallback_match1(exception except) { |
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179 | if (1 == except) { |
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180 | return 1; |
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181 | } else { |
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182 | return 0; |
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183 | } |
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184 | } |
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185 | __try_terminate(fallback_try1, fallback_catch1, fallback_match1); |
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186 | } |
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187 | } |
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188 | |
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189 | // main: choose which tests to run |
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190 | int main(int argc, char * argv[]) { |
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191 | raii_t a = {"main function"}; |
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192 | |
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193 | foo(); printf("\n"); |
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194 | alpha(); printf("\n"); |
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195 | farewell(); printf("\n"); |
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196 | fallback(); printf("\n"); |
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197 | // Uncaught termination test. |
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198 | terminate(7); |
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199 | } |
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