diff options
Diffstat (limited to 'lib/python2.7/unittest/signals.py')
-rw-r--r-- | lib/python2.7/unittest/signals.py | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/python2.7/unittest/signals.py b/lib/python2.7/unittest/signals.py new file mode 100644 index 0000000..e6a5fc5 --- /dev/null +++ b/lib/python2.7/unittest/signals.py @@ -0,0 +1,71 @@ +import signal +import weakref + +from functools import wraps + +__unittest = True + + +class _InterruptHandler(object): + def __init__(self, default_handler): + self.called = False + self.original_handler = default_handler + if isinstance(default_handler, int): + if default_handler == signal.SIG_DFL: + # Pretend it's signal.default_int_handler instead. + default_handler = signal.default_int_handler + elif default_handler == signal.SIG_IGN: + # Not quite the same thing as SIG_IGN, but the closest we + # can make it: do nothing. + def default_handler(unused_signum, unused_frame): + pass + else: + raise TypeError("expected SIGINT signal handler to be " + "signal.SIG_IGN, signal.SIG_DFL, or a " + "callable object") + self.default_handler = default_handler + + def __call__(self, signum, frame): + installed_handler = signal.getsignal(signal.SIGINT) + if installed_handler is not self: + # if we aren't the installed handler, then delegate immediately + # to the default handler + self.default_handler(signum, frame) + + if self.called: + self.default_handler(signum, frame) + self.called = True + for result in _results.keys(): + result.stop() + +_results = weakref.WeakKeyDictionary() +def registerResult(result): + _results[result] = 1 + +def removeResult(result): + return bool(_results.pop(result, None)) + +_interrupt_handler = None +def installHandler(): + global _interrupt_handler + if _interrupt_handler is None: + default_handler = signal.getsignal(signal.SIGINT) + _interrupt_handler = _InterruptHandler(default_handler) + signal.signal(signal.SIGINT, _interrupt_handler) + + +def removeHandler(method=None): + if method is not None: + @wraps(method) + def inner(*args, **kwargs): + initial = signal.getsignal(signal.SIGINT) + removeHandler() + try: + return method(*args, **kwargs) + finally: + signal.signal(signal.SIGINT, initial) + return inner + + global _interrupt_handler + if _interrupt_handler is not None: + signal.signal(signal.SIGINT, _interrupt_handler.original_handler) |