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1 |
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2 /* Check for interrupts */ |
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3 |
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4 #include "Python.h" |
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5 #include "pythread.h" |
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6 |
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7 #ifdef QUICKWIN |
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8 |
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9 #include <io.h> |
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10 |
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11 void |
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12 PyOS_InitInterrupts(void) |
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13 { |
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14 } |
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15 |
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16 void |
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17 PyOS_FiniInterrupts(void) |
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18 { |
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19 } |
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20 |
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21 int |
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22 PyOS_InterruptOccurred(void) |
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23 { |
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24 _wyield(); |
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25 } |
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26 |
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27 #define OK |
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28 |
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29 #endif /* QUICKWIN */ |
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30 |
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31 #if defined(_M_IX86) && !defined(__QNX__) |
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32 #include <io.h> |
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33 #endif |
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34 |
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35 #if defined(MSDOS) && !defined(QUICKWIN) |
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36 |
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37 #ifdef __GNUC__ |
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38 |
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39 /* This is for DJGPP's GO32 extender. I don't know how to trap |
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40 * control-C (There's no API for ctrl-C, and I don't want to mess with |
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41 * the interrupt vectors.) However, this DOES catch control-break. |
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42 * --Amrit |
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43 */ |
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44 |
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45 #include <go32.h> |
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46 |
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47 void |
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48 PyOS_InitInterrupts(void) |
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49 { |
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50 _go32_want_ctrl_break(1 /* TRUE */); |
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51 } |
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52 |
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53 void |
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54 PyOS_FiniInterrupts(void) |
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55 { |
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56 } |
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57 |
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58 int |
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59 PyOS_InterruptOccurred(void) |
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60 { |
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61 return _go32_was_ctrl_break_hit(); |
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62 } |
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63 |
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64 #else /* !__GNUC__ */ |
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65 |
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66 /* This might work for MS-DOS (untested though): */ |
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67 |
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68 void |
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69 PyOS_InitInterrupts(void) |
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70 { |
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71 } |
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72 |
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73 void |
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74 PyOS_FiniInterrupts(void) |
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75 { |
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76 } |
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77 |
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78 int |
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79 PyOS_InterruptOccurred(void) |
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80 { |
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81 int interrupted = 0; |
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82 while (kbhit()) { |
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83 if (getch() == '\003') |
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84 interrupted = 1; |
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85 } |
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86 return interrupted; |
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87 } |
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88 |
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89 #endif /* __GNUC__ */ |
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90 |
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91 #define OK |
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92 |
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93 #endif /* MSDOS && !QUICKWIN */ |
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94 |
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95 |
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96 #ifndef OK |
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97 |
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98 /* Default version -- for real operating systems and for Standard C */ |
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99 |
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100 #include <stdio.h> |
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101 #include <string.h> |
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102 #include <signal.h> |
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103 |
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104 static int interrupted; |
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105 |
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106 void |
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107 PyErr_SetInterrupt(void) |
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108 { |
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109 interrupted = 1; |
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110 } |
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111 |
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112 extern int PyErr_CheckSignals(void); |
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113 |
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114 static int |
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115 checksignals_witharg(void * arg) |
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116 { |
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117 return PyErr_CheckSignals(); |
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118 } |
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119 |
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120 static void |
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121 intcatcher(int sig) |
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122 { |
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123 extern void Py_Exit(int); |
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124 static char message[] = |
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125 "python: to interrupt a truly hanging Python program, interrupt once more.\n"; |
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126 switch (interrupted++) { |
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127 case 0: |
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128 break; |
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129 case 1: |
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130 #ifdef RISCOS |
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131 fprintf(stderr, message); |
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132 #else |
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133 write(2, message, strlen(message)); |
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134 #endif |
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135 break; |
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136 case 2: |
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137 interrupted = 0; |
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138 Py_Exit(1); |
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139 break; |
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140 } |
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141 PyOS_setsig(SIGINT, intcatcher); |
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142 Py_AddPendingCall(checksignals_witharg, NULL); |
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143 } |
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144 |
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145 static void (*old_siginthandler)(int) = SIG_DFL; |
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146 |
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147 void |
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148 PyOS_InitInterrupts(void) |
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149 { |
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150 if ((old_siginthandler = PyOS_setsig(SIGINT, SIG_IGN)) != SIG_IGN) |
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151 PyOS_setsig(SIGINT, intcatcher); |
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152 } |
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153 |
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154 void |
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155 PyOS_FiniInterrupts(void) |
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156 { |
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157 PyOS_setsig(SIGINT, old_siginthandler); |
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158 } |
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159 |
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160 int |
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161 PyOS_InterruptOccurred(void) |
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162 { |
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163 if (!interrupted) |
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164 return 0; |
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165 interrupted = 0; |
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166 return 1; |
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167 } |
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168 |
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169 #endif /* !OK */ |
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170 |
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171 void |
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172 PyOS_AfterFork(void) |
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173 { |
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174 #ifdef WITH_THREAD |
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175 PyEval_ReInitThreads(); |
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176 PyThread_ReInitTLS(); |
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177 #endif |
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178 } |