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annotate Modules/signalmodule.c @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents c3649173d093
children 9b711422c98f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Signal module -- many thanks to Lance Ellinghaus */
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3
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4 /* XXX Signals should be recorded per thread, now we have thread state. */
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5
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6 #include "Python.h"
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7 #include "intrcheck.h"
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8
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9 #ifdef MS_WINDOWS
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10 #include <Windows.h>
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11 #ifdef HAVE_PROCESS_H
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12 #include <process.h>
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13 #endif
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14 #endif
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15
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16 #ifdef HAVE_SIGNAL_H
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17 #include <signal.h>
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18 #endif
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19 #ifdef HAVE_SYS_STAT_H
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20 #include <sys/stat.h>
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21 #endif
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22 #ifdef HAVE_SYS_TIME_H
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23 #include <sys/time.h>
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24 #endif
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26 #ifndef SIG_ERR
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27 #define SIG_ERR ((PyOS_sighandler_t)(-1))
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28 #endif
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29
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30 #if defined(PYOS_OS2) && !defined(PYCC_GCC)
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31 #define NSIG 12
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32 #include <process.h>
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33 #endif
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34
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35 #ifndef NSIG
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36 # if defined(_NSIG)
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37 # define NSIG _NSIG /* For BSD/SysV */
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38 # elif defined(_SIGMAX)
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39 # define NSIG (_SIGMAX + 1) /* For QNX */
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40 # elif defined(SIGMAX)
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41 # define NSIG (SIGMAX + 1) /* For djgpp */
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42 # else
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43 # define NSIG 64 /* Use a reasonable default value */
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44 # endif
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45 #endif
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46
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47
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48 /*
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49 NOTES ON THE INTERACTION BETWEEN SIGNALS AND THREADS
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50
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51 When threads are supported, we want the following semantics:
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52
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53 - only the main thread can set a signal handler
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54 - any thread can get a signal handler
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55 - signals are only delivered to the main thread
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56
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57 I.e. we don't support "synchronous signals" like SIGFPE (catching
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58 this doesn't make much sense in Python anyway) nor do we support
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59 signals as a means of inter-thread communication, since not all
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60 thread implementations support that (at least our thread library
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61 doesn't).
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62
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63 We still have the problem that in some implementations signals
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64 generated by the keyboard (e.g. SIGINT) are delivered to all
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65 threads (e.g. SGI), while in others (e.g. Solaris) such signals are
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66 delivered to one random thread (an intermediate possibility would
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67 be to deliver it to the main thread -- POSIX?). For now, we have
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68 a working implementation that works in all three cases -- the
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69 handler ignores signals if getpid() isn't the same as in the main
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70 thread. XXX This is a hack.
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71
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72 GNU pth is a user-space threading library, and as such, all threads
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73 run within the same process. In this case, if the currently running
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74 thread is not the main_thread, send the signal to the main_thread.
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75 */
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76
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77 #ifdef WITH_THREAD
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78 #include <sys/types.h> /* For pid_t */
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79 #include "pythread.h"
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80 static long main_thread;
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81 static pid_t main_pid;
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82 #endif
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83
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84 static struct {
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85 int tripped;
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86 PyObject *func;
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87 } Handlers[NSIG];
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88
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89 static sig_atomic_t wakeup_fd = -1;
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90
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91 /* Speed up sigcheck() when none tripped */
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92 static volatile sig_atomic_t is_tripped = 0;
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93
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94 static PyObject *DefaultHandler;
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95 static PyObject *IgnoreHandler;
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96 static PyObject *IntHandler;
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97
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98 /* On Solaris 8, gcc will produce a warning that the function
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99 declaration is not a prototype. This is caused by the definition of
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100 SIG_DFL as (void (*)())0; the correct declaration would have been
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101 (void (*)(int))0. */
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102
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103 static PyOS_sighandler_t old_siginthandler = SIG_DFL;
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104
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105 #ifdef HAVE_GETITIMER
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106 static PyObject *ItimerError;
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107
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108 /* auxiliary functions for setitimer/getitimer */
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109 static void
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110 timeval_from_double(double d, struct timeval *tv)
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111 {
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112 tv->tv_sec = floor(d);
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113 tv->tv_usec = fmod(d, 1.0) * 1000000.0;
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114 }
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115
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116 Py_LOCAL_INLINE(double)
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117 double_from_timeval(struct timeval *tv)
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118 {
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119 return tv->tv_sec + (double)(tv->tv_usec / 1000000.0);
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120 }
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121
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122 static PyObject *
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123 itimer_retval(struct itimerval *iv)
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124 {
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125 PyObject *r, *v;
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126
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127 r = PyTuple_New(2);
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128 if (r == NULL)
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129 return NULL;
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130
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131 if(!(v = PyFloat_FromDouble(double_from_timeval(&iv->it_value)))) {
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132 Py_DECREF(r);
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133 return NULL;
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134 }
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135
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136 PyTuple_SET_ITEM(r, 0, v);
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137
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138 if(!(v = PyFloat_FromDouble(double_from_timeval(&iv->it_interval)))) {
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139 Py_DECREF(r);
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140 return NULL;
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141 }
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142
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143 PyTuple_SET_ITEM(r, 1, v);
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144
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145 return r;
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146 }
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147 #endif
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148
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149 static PyObject *
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150 signal_default_int_handler(PyObject *self, PyObject *args)
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151 {
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152 PyErr_SetNone(PyExc_KeyboardInterrupt);
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153 return NULL;
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154 }
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155
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156 PyDoc_STRVAR(default_int_handler_doc,
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157 "default_int_handler(...)\n\
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158 \n\
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159 The default handler for SIGINT installed by Python.\n\
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160 It raises KeyboardInterrupt.");
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161
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162
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163 static int
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164 checksignals_witharg(void * unused)
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165 {
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166 return PyErr_CheckSignals();
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167 }
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168
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169 static void
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170 trip_signal(int sig_num)
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171 {
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172 Handlers[sig_num].tripped = 1;
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173 if (is_tripped)
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174 return;
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175 /* Set is_tripped after setting .tripped, as it gets
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176 cleared in PyErr_CheckSignals() before .tripped. */
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177 is_tripped = 1;
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178 Py_AddPendingCall(checksignals_witharg, NULL);
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179 if (wakeup_fd != -1)
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180 write(wakeup_fd, "\0", 1);
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181 }
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182
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183 static void
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184 signal_handler(int sig_num)
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185 {
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186 int save_errno = errno;
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187
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188 #if defined(WITH_THREAD) && defined(WITH_PTH)
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189 if (PyThread_get_thread_ident() != main_thread) {
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190 pth_raise(*(pth_t *) main_thread, sig_num);
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191 }
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192 else
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193 #endif
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194 {
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195 #ifdef WITH_THREAD
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196 /* See NOTES section above */
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197 if (getpid() == main_pid)
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198 #endif
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199 {
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200 trip_signal(sig_num);
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201 }
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202
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203 #ifndef HAVE_SIGACTION
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204 #ifdef SIGCHLD
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205 /* To avoid infinite recursion, this signal remains
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206 reset until explicit re-instated.
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207 Don't clear the 'func' field as it is our pointer
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208 to the Python handler... */
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209 if (sig_num != SIGCHLD)
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210 #endif
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211 /* If the handler was not set up with sigaction, reinstall it. See
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212 * Python/pythonrun.c for the implementation of PyOS_setsig which
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213 * makes this true. See also issue8354. */
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214 PyOS_setsig(sig_num, signal_handler);
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215 #endif
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216 }
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217
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218 /* Issue #10311: asynchronously executing signal handlers should not
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219 mutate errno under the feet of unsuspecting C code. */
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220 errno = save_errno;
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221 }
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222
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223
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224 #ifdef HAVE_ALARM
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225 static PyObject *
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226 signal_alarm(PyObject *self, PyObject *args)
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227 {
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228 int t;
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229 if (!PyArg_ParseTuple(args, "i:alarm", &t))
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230 return NULL;
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231 /* alarm() returns the number of seconds remaining */
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232 return PyInt_FromLong((long)alarm(t));
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233 }
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234
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235 PyDoc_STRVAR(alarm_doc,
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236 "alarm(seconds)\n\
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237 \n\
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238 Arrange for SIGALRM to arrive after the given number of seconds.");
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239 #endif
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240
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241 #ifdef HAVE_PAUSE
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242 static PyObject *
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243 signal_pause(PyObject *self)
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244 {
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245 Py_BEGIN_ALLOW_THREADS
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246 (void)pause();
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247 Py_END_ALLOW_THREADS
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248 /* make sure that any exceptions that got raised are propagated
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249 * back into Python
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250 */
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251 if (PyErr_CheckSignals())
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252 return NULL;
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253
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254 Py_INCREF(Py_None);
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255 return Py_None;
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256 }
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257 PyDoc_STRVAR(pause_doc,
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258 "pause()\n\
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259 \n\
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260 Wait until a signal arrives.");
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261
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262 #endif
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263
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264
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265 static PyObject *
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266 signal_signal(PyObject *self, PyObject *args)
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267 {
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268 PyObject *obj;
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269 int sig_num;
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270 PyObject *old_handler;
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271 void (*func)(int);
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272 if (!PyArg_ParseTuple(args, "iO:signal", &sig_num, &obj))
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273 return NULL;
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274 #ifdef MS_WINDOWS
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275 /* Validate that sig_num is one of the allowable signals */
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276 switch (sig_num) {
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277 case SIGABRT: break;
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278 #ifdef SIGBREAK
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279 /* Issue #10003: SIGBREAK is not documented as permitted, but works
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280 and corresponds to CTRL_BREAK_EVENT. */
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281 case SIGBREAK: break;
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282 #endif
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283 case SIGFPE: break;
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284 case SIGILL: break;
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285 case SIGINT: break;
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286 case SIGSEGV: break;
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287 case SIGTERM: break;
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288 default:
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289 PyErr_SetString(PyExc_ValueError, "invalid signal value");
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290 return NULL;
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291 }
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292 #endif
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293 #ifdef WITH_THREAD
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294 if (PyThread_get_thread_ident() != main_thread) {
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295 PyErr_SetString(PyExc_ValueError,
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296 "signal only works in main thread");
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297 return NULL;
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298 }
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299 #endif
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300 if (sig_num < 1 || sig_num >= NSIG) {
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301 PyErr_SetString(PyExc_ValueError,
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302 "signal number out of range");
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303 return NULL;
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304 }
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305 if (obj == IgnoreHandler)
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306 func = SIG_IGN;
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307 else if (obj == DefaultHandler)
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308 func = SIG_DFL;
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309 else if (!PyCallable_Check(obj)) {
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310 PyErr_SetString(PyExc_TypeError,
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311 "signal handler must be signal.SIG_IGN, signal.SIG_DFL, or a callable object");
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312 return NULL;
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313 }
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314 else
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315 func = signal_handler;
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316 if (PyOS_setsig(sig_num, func) == SIG_ERR) {
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317 PyErr_SetFromErrno(PyExc_RuntimeError);
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318 return NULL;
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319 }
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320 old_handler = Handlers[sig_num].func;
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321 Handlers[sig_num].tripped = 0;
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322 Py_INCREF(obj);
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323 Handlers[sig_num].func = obj;
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324 return old_handler;
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325 }
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326
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327 PyDoc_STRVAR(signal_doc,
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328 "signal(sig, action) -> action\n\
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329 \n\
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330 Set the action for the given signal. The action can be SIG_DFL,\n\
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331 SIG_IGN, or a callable Python object. The previous action is\n\
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332 returned. See getsignal() for possible return values.\n\
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333 \n\
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334 *** IMPORTANT NOTICE ***\n\
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335 A signal handler function is called with two arguments:\n\
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336 the first is the signal number, the second is the interrupted stack frame.");
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337
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338
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339 static PyObject *
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340 signal_getsignal(PyObject *self, PyObject *args)
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341 {
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342 int sig_num;
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343 PyObject *old_handler;
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344 if (!PyArg_ParseTuple(args, "i:getsignal", &sig_num))
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345 return NULL;
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346 if (sig_num < 1 || sig_num >= NSIG) {
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347 PyErr_SetString(PyExc_ValueError,
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348 "signal number out of range");
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349 return NULL;
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350 }
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351 old_handler = Handlers[sig_num].func;
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352 Py_INCREF(old_handler);
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353 return old_handler;
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354 }
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355
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356 PyDoc_STRVAR(getsignal_doc,
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357 "getsignal(sig) -> action\n\
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358 \n\
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359 Return the current action for the given signal. The return value can be:\n\
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360 SIG_IGN -- if the signal is being ignored\n\
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361 SIG_DFL -- if the default action for the signal is in effect\n\
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362 None -- if an unknown handler is in effect\n\
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363 anything else -- the callable Python object used as a handler");
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364
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365 #ifdef HAVE_SIGINTERRUPT
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366 PyDoc_STRVAR(siginterrupt_doc,
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367 "siginterrupt(sig, flag) -> None\n\
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368 change system call restart behaviour: if flag is False, system calls\n\
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369 will be restarted when interrupted by signal sig, else system calls\n\
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370 will be interrupted.");
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371
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372 static PyObject *
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373 signal_siginterrupt(PyObject *self, PyObject *args)
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374 {
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375 int sig_num;
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376 int flag;
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377
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378 if (!PyArg_ParseTuple(args, "ii:siginterrupt", &sig_num, &flag))
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379 return NULL;
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380 if (sig_num < 1 || sig_num >= NSIG) {
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381 PyErr_SetString(PyExc_ValueError,
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382 "signal number out of range");
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383 return NULL;
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384 }
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385 if (siginterrupt(sig_num, flag)<0) {
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386 PyErr_SetFromErrno(PyExc_RuntimeError);
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387 return NULL;
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388 }
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389
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390 Py_INCREF(Py_None);
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391 return Py_None;
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392 }
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393
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394 #endif
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2e170c2f61e1 Use typedef PyOS_sighandler_t and APIs PyOS_getsig() and
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395
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396 static PyObject *
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397 signal_set_wakeup_fd(PyObject *self, PyObject *args)
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398 {
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399 struct stat buf;
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400 int fd, old_fd;
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401 if (!PyArg_ParseTuple(args, "i:set_wakeup_fd", &fd))
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402 return NULL;
44355
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
diff changeset
403 #ifdef WITH_THREAD
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404 if (PyThread_get_thread_ident() != main_thread) {
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parents: 61445
diff changeset
405 PyErr_SetString(PyExc_ValueError,
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406 "set_wakeup_fd only works in main thread");
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407 return NULL;
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408 }
44355
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Guido van Rossum <guido@python.org>
parents: 44264
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409 #endif
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410 if (fd != -1 && fstat(fd, &buf) != 0) {
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411 PyErr_SetString(PyExc_ValueError, "invalid fd");
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412 return NULL;
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413 }
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414 old_fd = wakeup_fd;
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415 wakeup_fd = fd;
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416 return PyLong_FromLong(old_fd);
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Guido van Rossum <guido@python.org>
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417 }
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Guido van Rossum <guido@python.org>
parents: 44264
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418
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Guido van Rossum <guido@python.org>
parents: 44264
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419 PyDoc_STRVAR(set_wakeup_fd_doc,
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Guido van Rossum <guido@python.org>
parents: 44264
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420 "set_wakeup_fd(fd) -> fd\n\
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
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421 \n\
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Guido van Rossum <guido@python.org>
parents: 44264
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422 Sets the fd to be written to (with '\\0') when a signal\n\
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Guido van Rossum <guido@python.org>
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423 comes in. A library can use this to wakeup select or poll.\n\
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Guido van Rossum <guido@python.org>
parents: 44264
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424 The previous fd is returned.\n\
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
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425 \n\
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Guido van Rossum <guido@python.org>
parents: 44264
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426 The fd must be non-blocking.");
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Guido van Rossum <guido@python.org>
parents: 44264
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427
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Guido van Rossum <guido@python.org>
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428 /* C API for the same, without all the error checking */
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Guido van Rossum <guido@python.org>
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429 int
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
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430 PySignal_SetWakeupFd(int fd)
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Guido van Rossum <guido@python.org>
parents: 44264
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431 {
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432 int old_fd = wakeup_fd;
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433 if (fd < 0)
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434 fd = -1;
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435 wakeup_fd = fd;
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436 return old_fd;
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Guido van Rossum <guido@python.org>
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437 }
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
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438
b89b0334372b Patch #1583 by Adam Olsen.
Guido van Rossum <guido@python.org>
parents: 44264
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439
46053
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440 #ifdef HAVE_SETITIMER
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parents: 45452
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441 static PyObject *
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parents: 45452
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442 signal_setitimer(PyObject *self, PyObject *args)
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Martin v. Löwis <martin@v.loewis.de>
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443 {
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Martin v. Löwis <martin@v.loewis.de>
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444 double first;
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Martin v. Löwis <martin@v.loewis.de>
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445 double interval = 0;
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446 int which;
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Martin v. Löwis <martin@v.loewis.de>
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447 struct itimerval new, old;
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Martin v. Löwis <martin@v.loewis.de>
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448
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449 if(!PyArg_ParseTuple(args, "id|d:setitimer", &which, &first, &interval))
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450 return NULL;
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451
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parents: 45452
diff changeset
452 timeval_from_double(first, &new.it_value);
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diff changeset
453 timeval_from_double(interval, &new.it_interval);
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454 /* Let OS check "which" value */
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parents: 45452
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455 if (setitimer(which, &new, &old) != 0) {
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456 PyErr_SetFromErrno(ItimerError);
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457 return NULL;
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458 }
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459
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diff changeset
460 return itimer_retval(&old);
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Martin v. Löwis <martin@v.loewis.de>
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461 }
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Martin v. Löwis <martin@v.loewis.de>
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462
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diff changeset
463 PyDoc_STRVAR(setitimer_doc,
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diff changeset
464 "setitimer(which, seconds[, interval])\n\
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465 \n\
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466 Sets given itimer (one of ITIMER_REAL, ITIMER_VIRTUAL\n\
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467 or ITIMER_PROF) to fire after value seconds and after\n\
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468 that every interval seconds.\n\
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469 The itimer can be cleared by setting seconds to zero.\n\
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470 \n\
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diff changeset
471 Returns old values as a tuple: (delay, interval).");
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diff changeset
472 #endif
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473
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
474
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diff changeset
475 #ifdef HAVE_GETITIMER
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diff changeset
476 static PyObject *
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diff changeset
477 signal_getitimer(PyObject *self, PyObject *args)
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diff changeset
478 {
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diff changeset
479 int which;
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parents: 45452
diff changeset
480 struct itimerval old;
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
481
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parents: 45452
diff changeset
482 if (!PyArg_ParseTuple(args, "i:getitimer", &which))
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483 return NULL;
46053
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Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
484
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
485 if (getitimer(which, &old) != 0) {
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486 PyErr_SetFromErrno(ItimerError);
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diff changeset
487 return NULL;
46053
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Martin v. Löwis <martin@v.loewis.de>
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488 }
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parents: 45452
diff changeset
489
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
490 return itimer_retval(&old);
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
491 }
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Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
492
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diff changeset
493 PyDoc_STRVAR(getitimer_doc,
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diff changeset
494 "getitimer(which)\n\
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parents: 45452
diff changeset
495 \n\
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diff changeset
496 Returns current value of given itimer.");
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diff changeset
497 #endif
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diff changeset
498
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2e170c2f61e1 Use typedef PyOS_sighandler_t and APIs PyOS_getsig() and
Guido van Rossum <guido@python.org>
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diff changeset
499
1630
0202a72d994e New experimental modules -- signal and sybase
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parents:
diff changeset
500 /* List of functions defined in the module */
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
501 static PyMethodDef signal_methods[] = {
6142
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parents: 5923
diff changeset
502 #ifdef HAVE_ALARM
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503 {"alarm", signal_alarm, METH_VARARGS, alarm_doc},
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parents: 2211
diff changeset
504 #endif
46053
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diff changeset
505 #ifdef HAVE_SETITIMER
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parents: 45452
diff changeset
506 {"setitimer", signal_setitimer, METH_VARARGS, setitimer_doc},
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Guido van Rossum <guido@python.org>
parents: 2211
diff changeset
507 #endif
46053
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parents: 45452
diff changeset
508 #ifdef HAVE_GETITIMER
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diff changeset
509 {"getitimer", signal_getitimer, METH_VARARGS, getitimer_doc},
46053
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diff changeset
510 #endif
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diff changeset
511 {"signal", signal_signal, METH_VARARGS, signal_doc},
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diff changeset
512 {"getsignal", signal_getsignal, METH_VARARGS, getsignal_doc},
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diff changeset
513 {"set_wakeup_fd", signal_set_wakeup_fd, METH_VARARGS, set_wakeup_fd_doc},
45452
3657c27ea2fd Issue 1089358. Adds the siginterrupt() function, that is just a
Facundo Batista <facundobatista@gmail.com>
parents: 44355
diff changeset
514 #ifdef HAVE_SIGINTERRUPT
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diff changeset
515 {"siginterrupt", signal_siginterrupt, METH_VARARGS, siginterrupt_doc},
45452
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Facundo Batista <facundobatista@gmail.com>
parents: 44355
diff changeset
516 #endif
6142
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Guido van Rossum <guido@python.org>
parents: 5923
diff changeset
517 #ifdef HAVE_PAUSE
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518 {"pause", (PyCFunction)signal_pause,
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diff changeset
519 METH_NOARGS,pause_doc},
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Guido van Rossum <guido@python.org>
parents: 2211
diff changeset
520 #endif
61465
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diff changeset
521 {"default_int_handler", signal_default_int_handler,
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diff changeset
522 METH_VARARGS, default_int_handler_doc},
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diff changeset
523 {NULL, NULL} /* sentinel */
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Guido van Rossum <guido@python.org>
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diff changeset
524 };
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
525
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Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
526
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23550
diff changeset
527 PyDoc_STRVAR(module_doc,
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
528 "This module provides mechanisms to use signal handlers in Python.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
529 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
530 Functions:\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
531 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
532 alarm() -- cause SIGALRM after a specified time [Unix only]\n\
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
533 setitimer() -- cause a signal (described below) after a specified\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
534 float time and the timer may restart then [Unix only]\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
535 getitimer() -- get current value of timer [Unix only]\n\
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
536 signal() -- set the action for a given signal\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
537 getsignal() -- get the signal action for a given signal\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
538 pause() -- wait until a signal arrives [Unix only]\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
539 default_int_handler() -- default SIGINT handler\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
540 \n\
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
541 signal constants:\n\
8570
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Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
542 SIG_DFL -- used to refer to the system default handler\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
543 SIG_IGN -- used to ignore the signal\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
544 NSIG -- number of defined signals\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
545 SIGINT, SIGTERM, etc. -- signal numbers\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
546 \n\
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
547 itimer constants:\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
548 ITIMER_REAL -- decrements in real time, and delivers SIGALRM upon\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
549 expiration\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
550 ITIMER_VIRTUAL -- decrements only when the process is executing,\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
551 and delivers SIGVTALRM upon expiration\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
552 ITIMER_PROF -- decrements both when the process is executing and\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
553 when the system is executing on behalf of the process.\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
554 Coupled with ITIMER_VIRTUAL, this timer is usually\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
555 used to profile the time spent by the application\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
556 in user and kernel space. SIGPROF is delivered upon\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
557 expiration.\n\
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
558 \n\n\
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
559 *** IMPORTANT NOTICE ***\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
560 A signal handler function is called with two arguments:\n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23550
diff changeset
561 the first is the signal number, the second is the interrupted stack frame.");
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 8210
diff changeset
562
24471
f66b3a3509c7 Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
Mark Hammond <mhammond@skippinet.com.au>
parents: 24071
diff changeset
563 PyMODINIT_FUNC
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
564 initsignal(void)
1630
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Guido van Rossum <guido@python.org>
parents:
diff changeset
565 {
61465
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diff changeset
566 PyObject *m, *d, *x;
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diff changeset
567 int i;
1678
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
568
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
569 #ifdef WITH_THREAD
61465
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diff changeset
570 main_thread = PyThread_get_thread_ident();
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diff changeset
571 main_pid = getpid();
1678
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Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
572 #endif
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
573
61465
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diff changeset
574 /* Create the module and add the functions */
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diff changeset
575 m = Py_InitModule3("signal", signal_methods, module_doc);
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diff changeset
576 if (m == NULL)
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577 return;
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Guido van Rossum <guido@python.org>
parents:
diff changeset
578
61465
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diff changeset
579 /* Add some symbolic constants to the module */
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580 d = PyModule_GetDict(m);
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parents:
diff changeset
581
61465
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diff changeset
582 x = DefaultHandler = PyLong_FromVoidPtr((void *)SIG_DFL);
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583 if (!x || PyDict_SetItemString(d, "SIG_DFL", x) < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
584 goto finally;
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
585
61465
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diff changeset
586 x = IgnoreHandler = PyLong_FromVoidPtr((void *)SIG_IGN);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
587 if (!x || PyDict_SetItemString(d, "SIG_IGN", x) < 0)
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diff changeset
588 goto finally;
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
589
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
590 x = PyInt_FromLong((long)NSIG);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
591 if (!x || PyDict_SetItemString(d, "NSIG", x) < 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
592 goto finally;
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parents: 61445
diff changeset
593 Py_DECREF(x);
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
594
61465
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parents: 61445
diff changeset
595 x = IntHandler = PyDict_GetItemString(d, "default_int_handler");
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parents: 61445
diff changeset
596 if (!x)
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diff changeset
597 goto finally;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
598 Py_INCREF(IntHandler);
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
599
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
600 Handlers[0].tripped = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
601 for (i = 1; i < NSIG; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
602 void (*t)(int);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
603 t = PyOS_getsig(i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
604 Handlers[i].tripped = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
605 if (t == SIG_DFL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
606 Handlers[i].func = DefaultHandler;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
607 else if (t == SIG_IGN)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
608 Handlers[i].func = IgnoreHandler;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
609 else
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diff changeset
610 Handlers[i].func = Py_None; /* None of our business */
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diff changeset
611 Py_INCREF(Handlers[i].func);
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diff changeset
612 }
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diff changeset
613 if (Handlers[SIGINT].func == DefaultHandler) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
614 /* Install default int handler */
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diff changeset
615 Py_INCREF(IntHandler);
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diff changeset
616 Py_DECREF(Handlers[SIGINT].func);
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parents: 61445
diff changeset
617 Handlers[SIGINT].func = IntHandler;
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diff changeset
618 old_siginthandler = PyOS_setsig(SIGINT, signal_handler);
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619 }
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parents:
diff changeset
620
0202a72d994e New experimental modules -- signal and sybase
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parents:
diff changeset
621 #ifdef SIGHUP
61465
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622 x = PyInt_FromLong(SIGHUP);
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parents: 61445
diff changeset
623 PyDict_SetItemString(d, "SIGHUP", x);
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diff changeset
624 Py_XDECREF(x);
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diff changeset
625 #endif
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
626 #ifdef SIGINT
61465
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627 x = PyInt_FromLong(SIGINT);
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diff changeset
628 PyDict_SetItemString(d, "SIGINT", x);
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diff changeset
629 Py_XDECREF(x);
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Guido van Rossum <guido@python.org>
parents:
diff changeset
630 #endif
20207
e2da9a929aca SF patch [#466877] SIGBREAK is missing from signal module.
Tim Peters <tim.peters@gmail.com>
parents: 18754
diff changeset
631 #ifdef SIGBREAK
61465
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632 x = PyInt_FromLong(SIGBREAK);
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633 PyDict_SetItemString(d, "SIGBREAK", x);
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diff changeset
634 Py_XDECREF(x);
20207
e2da9a929aca SF patch [#466877] SIGBREAK is missing from signal module.
Tim Peters <tim.peters@gmail.com>
parents: 18754
diff changeset
635 #endif
1630
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Guido van Rossum <guido@python.org>
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diff changeset
636 #ifdef SIGQUIT
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637 x = PyInt_FromLong(SIGQUIT);
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638 PyDict_SetItemString(d, "SIGQUIT", x);
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diff changeset
639 Py_XDECREF(x);
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diff changeset
640 #endif
0202a72d994e New experimental modules -- signal and sybase
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parents:
diff changeset
641 #ifdef SIGILL
61465
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642 x = PyInt_FromLong(SIGILL);
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643 PyDict_SetItemString(d, "SIGILL", x);
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diff changeset
644 Py_XDECREF(x);
1630
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diff changeset
645 #endif
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
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diff changeset
646 #ifdef SIGTRAP
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647 x = PyInt_FromLong(SIGTRAP);
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648 PyDict_SetItemString(d, "SIGTRAP", x);
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649 Py_XDECREF(x);
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diff changeset
650 #endif
0202a72d994e New experimental modules -- signal and sybase
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diff changeset
651 #ifdef SIGIOT
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652 x = PyInt_FromLong(SIGIOT);
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653 PyDict_SetItemString(d, "SIGIOT", x);
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654 Py_XDECREF(x);
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655 #endif
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656 #ifdef SIGABRT
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657 x = PyInt_FromLong(SIGABRT);
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658 PyDict_SetItemString(d, "SIGABRT", x);
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659 Py_XDECREF(x);
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660 #endif
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661 #ifdef SIGEMT
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662 x = PyInt_FromLong(SIGEMT);
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663 PyDict_SetItemString(d, "SIGEMT", x);
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664 Py_XDECREF(x);
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665 #endif
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666 #ifdef SIGFPE
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667 x = PyInt_FromLong(SIGFPE);
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668 PyDict_SetItemString(d, "SIGFPE", x);
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669 Py_XDECREF(x);
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670 #endif
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671 #ifdef SIGKILL
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672 x = PyInt_FromLong(SIGKILL);
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673 PyDict_SetItemString(d, "SIGKILL", x);
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674 Py_XDECREF(x);
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675 #endif
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676 #ifdef SIGBUS
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677 x = PyInt_FromLong(SIGBUS);
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678 PyDict_SetItemString(d, "SIGBUS", x);
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679 Py_XDECREF(x);
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680 #endif
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681 #ifdef SIGSEGV
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682 x = PyInt_FromLong(SIGSEGV);
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683 PyDict_SetItemString(d, "SIGSEGV", x);
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684 Py_XDECREF(x);
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685 #endif
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686 #ifdef SIGSYS
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687 x = PyInt_FromLong(SIGSYS);
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688 PyDict_SetItemString(d, "SIGSYS", x);
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689 Py_XDECREF(x);
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690 #endif
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691 #ifdef SIGPIPE
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692 x = PyInt_FromLong(SIGPIPE);
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693 PyDict_SetItemString(d, "SIGPIPE", x);
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694 Py_XDECREF(x);
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695 #endif
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696 #ifdef SIGALRM
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697 x = PyInt_FromLong(SIGALRM);
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698 PyDict_SetItemString(d, "SIGALRM", x);
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699 Py_XDECREF(x);
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700 #endif
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701 #ifdef SIGTERM
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702 x = PyInt_FromLong(SIGTERM);
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703 PyDict_SetItemString(d, "SIGTERM", x);
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704 Py_XDECREF(x);
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705 #endif
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706 #ifdef SIGUSR1
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707 x = PyInt_FromLong(SIGUSR1);
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708 PyDict_SetItemString(d, "SIGUSR1", x);
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709 Py_XDECREF(x);
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710 #endif
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711 #ifdef SIGUSR2
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712 x = PyInt_FromLong(SIGUSR2);
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713 PyDict_SetItemString(d, "SIGUSR2", x);
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714 Py_XDECREF(x);
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715 #endif
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716 #ifdef SIGCLD
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717 x = PyInt_FromLong(SIGCLD);
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718 PyDict_SetItemString(d, "SIGCLD", x);
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719 Py_XDECREF(x);
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720 #endif
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721 #ifdef SIGCHLD
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722 x = PyInt_FromLong(SIGCHLD);
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723 PyDict_SetItemString(d, "SIGCHLD", x);
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724 Py_XDECREF(x);
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725 #endif
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726 #ifdef SIGPWR
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727 x = PyInt_FromLong(SIGPWR);
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728 PyDict_SetItemString(d, "SIGPWR", x);
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729 Py_XDECREF(x);
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730 #endif
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731 #ifdef SIGIO
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732 x = PyInt_FromLong(SIGIO);
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733 PyDict_SetItemString(d, "SIGIO", x);
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734 Py_XDECREF(x);
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735 #endif
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736 #ifdef SIGURG
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737 x = PyInt_FromLong(SIGURG);
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738 PyDict_SetItemString(d, "SIGURG", x);
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739 Py_XDECREF(x);
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740 #endif
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741 #ifdef SIGWINCH
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742 x = PyInt_FromLong(SIGWINCH);
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743 PyDict_SetItemString(d, "SIGWINCH", x);
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744 Py_XDECREF(x);
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745 #endif
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746 #ifdef SIGPOLL
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747 x = PyInt_FromLong(SIGPOLL);
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748 PyDict_SetItemString(d, "SIGPOLL", x);
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749 Py_XDECREF(x);
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750 #endif
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751 #ifdef SIGSTOP
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752 x = PyInt_FromLong(SIGSTOP);
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753 PyDict_SetItemString(d, "SIGSTOP", x);
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754 Py_XDECREF(x);
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755 #endif
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756 #ifdef SIGTSTP
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757 x = PyInt_FromLong(SIGTSTP);
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758 PyDict_SetItemString(d, "SIGTSTP", x);
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759 Py_XDECREF(x);
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760 #endif
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761 #ifdef SIGCONT
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762 x = PyInt_FromLong(SIGCONT);
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763 PyDict_SetItemString(d, "SIGCONT", x);
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764 Py_XDECREF(x);
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765 #endif
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766 #ifdef SIGTTIN
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767 x = PyInt_FromLong(SIGTTIN);
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768 PyDict_SetItemString(d, "SIGTTIN", x);
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769 Py_XDECREF(x);
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770 #endif
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771 #ifdef SIGTTOU
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772 x = PyInt_FromLong(SIGTTOU);
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773 PyDict_SetItemString(d, "SIGTTOU", x);
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774 Py_XDECREF(x);
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775 #endif
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776 #ifdef SIGVTALRM
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777 x = PyInt_FromLong(SIGVTALRM);
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778 PyDict_SetItemString(d, "SIGVTALRM", x);
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779 Py_XDECREF(x);
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780 #endif
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781 #ifdef SIGPROF
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782 x = PyInt_FromLong(SIGPROF);
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783 PyDict_SetItemString(d, "SIGPROF", x);
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784 Py_XDECREF(x);
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785 #endif
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786 #ifdef SIGXCPU
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diff changeset
787 x = PyInt_FromLong(SIGXCPU);
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parents: 61445
diff changeset
788 PyDict_SetItemString(d, "SIGXCPU", x);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
789 Py_XDECREF(x);
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
790 #endif
4736
94ad56ef5073 initsignal(): Added SIGXCPU and SIGXFSZ. Left in the definitions for
Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
791 #ifdef SIGXFSZ
61465
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parents: 61445
diff changeset
792 x = PyInt_FromLong(SIGXFSZ);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
793 PyDict_SetItemString(d, "SIGXFSZ", x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
794 Py_XDECREF(x);
4736
94ad56ef5073 initsignal(): Added SIGXCPU and SIGXFSZ. Left in the definitions for
Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
795 #endif
30032
677038873a22 Patch [ 776725 ] add SIGRTMIN, SIGRTMAX to signalmodule.c
Anthony Baxter <anthonybaxter@gmail.com>
parents: 28295
diff changeset
796 #ifdef SIGRTMIN
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
797 x = PyInt_FromLong(SIGRTMIN);
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parents: 61445
diff changeset
798 PyDict_SetItemString(d, "SIGRTMIN", x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
799 Py_XDECREF(x);
30032
677038873a22 Patch [ 776725 ] add SIGRTMIN, SIGRTMAX to signalmodule.c
Anthony Baxter <anthonybaxter@gmail.com>
parents: 28295
diff changeset
800 #endif
677038873a22 Patch [ 776725 ] add SIGRTMIN, SIGRTMAX to signalmodule.c
Anthony Baxter <anthonybaxter@gmail.com>
parents: 28295
diff changeset
801 #ifdef SIGRTMAX
61465
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diff changeset
802 x = PyInt_FromLong(SIGRTMAX);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
803 PyDict_SetItemString(d, "SIGRTMAX", x);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
804 Py_XDECREF(x);
30032
677038873a22 Patch [ 776725 ] add SIGRTMIN, SIGRTMAX to signalmodule.c
Anthony Baxter <anthonybaxter@gmail.com>
parents: 28295
diff changeset
805 #endif
21715
4c6c13aa8a99 Export SIGINFO. Fixes #502077.
Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
806 #ifdef SIGINFO
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
807 x = PyInt_FromLong(SIGINFO);
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parents: 61445
diff changeset
808 PyDict_SetItemString(d, "SIGINFO", x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
809 Py_XDECREF(x);
21715
4c6c13aa8a99 Export SIGINFO. Fixes #502077.
Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
810 #endif
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
811
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
812 #ifdef ITIMER_REAL
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
813 x = PyLong_FromLong(ITIMER_REAL);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
814 PyDict_SetItemString(d, "ITIMER_REAL", x);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
815 Py_DECREF(x);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
816 #endif
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
817 #ifdef ITIMER_VIRTUAL
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
818 x = PyLong_FromLong(ITIMER_VIRTUAL);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
819 PyDict_SetItemString(d, "ITIMER_VIRTUAL", x);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
820 Py_DECREF(x);
21715
4c6c13aa8a99 Export SIGINFO. Fixes #502077.
Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
821 #endif
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
822 #ifdef ITIMER_PROF
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
823 x = PyLong_FromLong(ITIMER_PROF);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
824 PyDict_SetItemString(d, "ITIMER_PROF", x);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
825 Py_DECREF(x);
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
826 #endif
4863
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Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
827
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
828 #if defined (HAVE_SETITIMER) || defined (HAVE_GETITIMER)
61465
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diff changeset
829 ItimerError = PyErr_NewException("signal.ItimerError",
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diff changeset
830 PyExc_IOError, NULL);
48847
Neal Norwitz <nnorwitz@gmail.com>
parents: 47664
diff changeset
831 if (ItimerError != NULL)
61465
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diff changeset
832 PyDict_SetItemString(d, "ItimerError", ItimerError);
46053
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
833 #endif
461ff43e74d0 Patch #2240: Implement signal.setitimer and signal.getitimer.
Martin v. Löwis <martin@v.loewis.de>
parents: 45452
diff changeset
834
60197
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
835 #ifdef CTRL_C_EVENT
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
836 x = PyInt_FromLong(CTRL_C_EVENT);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
837 PyDict_SetItemString(d, "CTRL_C_EVENT", x);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
838 Py_DECREF(x);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
839 #endif
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
840
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
841 #ifdef CTRL_BREAK_EVENT
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
842 x = PyInt_FromLong(CTRL_BREAK_EVENT);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
843 PyDict_SetItemString(d, "CTRL_BREAK_EVENT", x);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
844 Py_DECREF(x);
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
845 #endif
0ab89e8bdedc Implement #1220212. Add os.kill support for Windows.
Brian Curtin <brian.curtin@gmail.com>
parents: 59040
diff changeset
846
61465
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diff changeset
847 if (!PyErr_Occurred())
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parents: 61445
diff changeset
848 return;
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
849
61465
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diff changeset
850 /* Check for errors */
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
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diff changeset
851 finally:
61465
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
852 return;
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
853 }
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
854
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
855 static void
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
856 finisignal(void)
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
857 {
61465
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diff changeset
858 int i;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
859 PyObject *func;
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
860
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
861 PyOS_setsig(SIGINT, old_siginthandler);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
862 old_siginthandler = SIG_DFL;
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
863
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
864 for (i = 1; i < NSIG; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
865 func = Handlers[i].func;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
866 Handlers[i].tripped = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
867 Handlers[i].func = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
868 if (i != SIGINT && func != NULL && func != Py_None &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
869 func != DefaultHandler && func != IgnoreHandler)
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parents: 61445
diff changeset
870 PyOS_setsig(i, SIG_DFL);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
871 Py_XDECREF(func);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
872 }
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
873
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
874 Py_XDECREF(IntHandler);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
875 IntHandler = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
876 Py_XDECREF(DefaultHandler);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
877 DefaultHandler = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
878 Py_XDECREF(IgnoreHandler);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
879 IgnoreHandler = NULL;
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
880 }
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
881
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
882
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
883 /* Declared in pyerrors.h */
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
884 int
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
885 PyErr_CheckSignals(void)
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
886 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
887 int i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
888 PyObject *f;
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
889
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
890 if (!is_tripped)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
891 return 0;
44264
a4aab72c2cc0 Backport patch #1643738.
Guido van Rossum <guido@python.org>
parents: 36324
diff changeset
892
1678
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
893 #ifdef WITH_THREAD
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
894 if (PyThread_get_thread_ident() != main_thread)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
895 return 0;
1678
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
896 #endif
44264
a4aab72c2cc0 Backport patch #1643738.
Guido van Rossum <guido@python.org>
parents: 36324
diff changeset
897
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
898 /*
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61441
diff changeset
899 * The is_tripped variable is meant to speed up the calls to
61465
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parents: 61445
diff changeset
900 * PyErr_CheckSignals (both directly or via pending calls) when no
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
901 * signal has arrived. This variable is set to 1 when a signal arrives
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parents: 61445
diff changeset
902 * and it is set to 0 here, when we know some signals arrived. This way
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parents: 61445
diff changeset
903 * we can run the registered handlers with no signals blocked.
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parents: 61445
diff changeset
904 *
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parents: 61445
diff changeset
905 * NOTE: with this approach we can have a situation where is_tripped is
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
906 * 1 but we have no more signals to handle (Handlers[i].tripped
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parents: 61445
diff changeset
907 * is 0 for every signal i). This won't do us any harm (except
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parents: 61445
diff changeset
908 * we're gonna spent some cycles for nothing). This happens when
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parents: 61445
diff changeset
909 * we receive a signal i after we zero is_tripped and before we
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
910 * check Handlers[i].tripped.
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parents: 61445
diff changeset
911 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
912 is_tripped = 0;
44264
a4aab72c2cc0 Backport patch #1643738.
Guido van Rossum <guido@python.org>
parents: 36324
diff changeset
913
61465
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diff changeset
914 if (!(f = (PyObject *)PyEval_GetFrame()))
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parents: 61445
diff changeset
915 f = Py_None;
44264
a4aab72c2cc0 Backport patch #1643738.
Guido van Rossum <guido@python.org>
parents: 36324
diff changeset
916
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
917 for (i = 1; i < NSIG; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
918 if (Handlers[i].tripped) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
919 PyObject *result = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
920 PyObject *arglist = Py_BuildValue("(iO)", i, f);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
921 Handlers[i].tripped = 0;
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
922
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
923 if (arglist) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
924 result = PyEval_CallObject(Handlers[i].func,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
925 arglist);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
926 Py_DECREF(arglist);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
927 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
928 if (!result)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
929 return -1;
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
930
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
931 Py_DECREF(result);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
932 }
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parents: 61445
diff changeset
933 }
44264
a4aab72c2cc0 Backport patch #1643738.
Guido van Rossum <guido@python.org>
parents: 36324
diff changeset
934
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
935 return 0;
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
936 }
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
937
14638
2e170c2f61e1 Use typedef PyOS_sighandler_t and APIs PyOS_getsig() and
Guido van Rossum <guido@python.org>
parents: 14375
diff changeset
938
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
939 /* Replacements for intrcheck.c functionality
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
940 * Declared in pyerrors.h
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
941 */
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
942 void
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
943 PyErr_SetInterrupt(void)
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
944 {
69426
7d355c2ff3d4 (Merge 3.1) Issue #11768: The signal handler of the signal module only calls
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68256
diff changeset
945 trip_signal(SIGINT);
4863
b1707bcdc265 Several changes:
Barry Warsaw <barry@python.org>
parents: 4736
diff changeset
946 }
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
947
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
948 void
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
949 PyOS_InitInterrupts(void)
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
950 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
951 initsignal();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
952 _PyImport_FixupExtension("signal", "signal");
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
953 }
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
954
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
955 void
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
956 PyOS_FiniInterrupts(void)
5923
3e158e69ac5d Add finialization routines; fixed some memory leaks related to this.
Guido van Rossum <guido@python.org>
parents: 5730
diff changeset
957 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
958 finisignal();
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
959 }
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
960
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
961 int
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
962 PyOS_InterruptOccurred(void)
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
963 {
61465
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parents: 61445
diff changeset
964 if (Handlers[SIGINT].tripped) {
1678
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
965 #ifdef WITH_THREAD
61465
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parents: 61445
diff changeset
966 if (PyThread_get_thread_ident() != main_thread)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
967 return 0;
1678
1f06f71904c2 * Modules/signalmodule.c: added thread compatibility (only main
Guido van Rossum <guido@python.org>
parents: 1658
diff changeset
968 #endif
61465
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parents: 61445
diff changeset
969 Handlers[SIGINT].tripped = 0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
970 return 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
971 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 61445
diff changeset
972 return 0;
1630
0202a72d994e New experimental modules -- signal and sybase
Guido van Rossum <guido@python.org>
parents:
diff changeset
973 }
6578
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
974
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
975 void
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13500
diff changeset
976 PyOS_AfterFork(void)
6578
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
977 {
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
978 #ifdef WITH_THREAD
74729
c3649173d093 Issue #13817: After fork(), reinit the ad-hoc TLS implementation earlier to fix
Charles-François Natali <neologix@free.fr>
parents: 72897
diff changeset
979 /* PyThread_ReInitTLS() must be called early, to make sure that the TLS API
c3649173d093 Issue #13817: After fork(), reinit the ad-hoc TLS implementation earlier to fix
Charles-François Natali <neologix@free.fr>
parents: 72897
diff changeset
980 * can be called safely. */
c3649173d093 Issue #13817: After fork(), reinit the ad-hoc TLS implementation earlier to fix
Charles-François Natali <neologix@free.fr>
parents: 72897
diff changeset
981 PyThread_ReInitTLS();
61465
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parents: 61445
diff changeset
982 PyEval_ReInitThreads();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
983 main_thread = PyThread_get_thread_ident();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
984 main_pid = getpid();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 61445
diff changeset
985 _PyImport_ReInitLock();
6578
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
986 #endif
01ee5607bb35 This fix (across 4 files in 3 directories) solves a subtle problem with
Guido van Rossum <guido@python.org>
parents: 6546
diff changeset
987 }