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annotate Lib/test/win_console_handler.py @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents acdb32005c0a
children
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1 """Script used to test os.kill on Windows, for issue #1220212
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2
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3 This script is started as a subprocess in test_os and is used to test the
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4 CTRL_C_EVENT and CTRL_BREAK_EVENT signals, which requires a custom handler
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5 to be written into the kill target.
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6
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7 See http://msdn.microsoft.com/en-us/library/ms685049%28v=VS.85%29.aspx for a
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8 similar example in C.
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9 """
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10
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11 from ctypes import wintypes, WINFUNCTYPE
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12 import signal
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13 import ctypes
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14 import mmap
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15 import sys
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16
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17 # Function prototype for the handler function. Returns BOOL, takes a DWORD.
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18 HandlerRoutine = WINFUNCTYPE(wintypes.BOOL, wintypes.DWORD)
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19
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20 def _ctrl_handler(sig):
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21 """Handle a sig event and return 0 to terminate the process"""
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22 if sig == signal.CTRL_C_EVENT:
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23 pass
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24 elif sig == signal.CTRL_BREAK_EVENT:
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25 pass
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26 else:
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27 print("UNKNOWN EVENT")
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28 return 0
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29
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30 ctrl_handler = HandlerRoutine(_ctrl_handler)
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33 SetConsoleCtrlHandler = ctypes.windll.kernel32.SetConsoleCtrlHandler
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34 SetConsoleCtrlHandler.argtypes = (HandlerRoutine, wintypes.BOOL)
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35 SetConsoleCtrlHandler.restype = wintypes.BOOL
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36
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37 if __name__ == "__main__":
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38 # Add our console control handling function with value 1
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39 if not SetConsoleCtrlHandler(ctrl_handler, 1):
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40 print("Unable to add SetConsoleCtrlHandler")
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41 exit(-1)
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42
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43 # Awaken mail process
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44 m = mmap.mmap(-1, 1, sys.argv[1])
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45 m[0] = '1'
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46
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47 # Do nothing but wait for the signal
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48 while True:
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49 pass