48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
"""
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In order to detect a filehandle that's been closed, our only clue may be
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the operating system returning the same filehandle in response to some
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other operation.
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The builtins 'file' and 'open' are patched to collaborate with the
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notify_opened protocol.
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"""
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builtins_orig = __builtins__
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from eventlet import hubs
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from eventlet.hubs import hub
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from eventlet.patcher import slurp_properties
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import sys
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__all__ = dir(builtins_orig)
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__patched__ = ['file', 'open']
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slurp_properties(builtins_orig, globals(),
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ignore=__patched__, srckeys=dir(builtins_orig))
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hubs.get_hub()
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__original_file = file
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class file(__original_file):
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def __init__(self, *args, **kwargs):
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super(file, self).__init__(*args, **kwargs)
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hubs.notify_opened(self.fileno())
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__original_open = open
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__opening = False
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def open(*args):
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global __opening
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result = __original_open(*args)
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if not __opening:
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# This is incredibly ugly. 'open' is used under the hood by
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# the import process. So, ensure we don't wind up in an
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# infinite loop.
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__opening = True
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hubs.notify_opened(result.fileno())
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__opening = False
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return result
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