| 7 | |
| 8 | |
| 9 | class _InterruptHandler(object): |
| 10 | def __init__(self, default_handler): |
| 11 | self.called = False |
| 12 | self.original_handler = default_handler |
| 13 | if isinstance(default_handler, int): |
| 14 | if default_handler == signal.SIG_DFL: |
| 15 | # Pretend it's signal.default_int_handler instead. |
| 16 | default_handler = signal.default_int_handler |
| 17 | elif default_handler == signal.SIG_IGN: |
| 18 | # Not quite the same thing as SIG_IGN, but the closest we |
| 19 | # can make it: do nothing. |
| 20 | def default_handler(unused_signum, unused_frame): |
| 21 | pass |
| 22 | else: |
| 23 | raise TypeError("expected SIGINT signal handler to be " |
| 24 | "signal.SIG_IGN, signal.SIG_DFL, or a " |
| 25 | "callable object") |
| 26 | self.default_handler = default_handler |
| 27 | |
| 28 | def __call__(self, signum, frame): |
| 29 | installed_handler = signal.getsignal(signal.SIGINT) |
| 30 | if installed_handler is not self: |
| 31 | # if we aren't the installed handler, then delegate immediately |
| 32 | # to the default handler |
| 33 | self.default_handler(signum, frame) |
| 34 | |
| 35 | if self.called: |
| 36 | self.default_handler(signum, frame) |
| 37 | self.called = True |
| 38 | for result in _results.keys(): |
| 39 | result.stop() |
| 40 | |
| 41 | _results = weakref.WeakKeyDictionary() |
| 42 | def registerResult(result): |
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