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24e837f231
add private method to enum to support replacing global constants with Enum members: - search for candidate constants via supplied filter - create new enum class and members - insert enum class and replace constants with members via supplied module name - replace __reduce_ex__ with function that returns member name, so previous Python versions can unpickle modify IntEnum classes to use new method
79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
import _signal
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from _signal import *
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from functools import wraps as _wraps
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from enum import IntEnum as _IntEnum
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_globals = globals()
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_IntEnum._convert(
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'Signals', __name__,
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lambda name:
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name.isupper()
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and (name.startswith('SIG') and not name.startswith('SIG_'))
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or name.startswith('CTRL_'))
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_IntEnum._convert(
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'Handlers', __name__,
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lambda name: name in ('SIG_DFL', 'SIG_IGN'))
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if 'pthread_sigmask' in _globals:
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_IntEnum._convert(
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'Sigmasks', __name__,
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lambda name: name in ('SIG_BLOCK', 'SIG_UNBLOCK', 'SIG_SETMASK'))
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def _int_to_enum(value, enum_klass):
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"""Convert a numeric value to an IntEnum member.
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If it's not a known member, return the numeric value itself.
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"""
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try:
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return enum_klass(value)
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except ValueError:
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return value
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def _enum_to_int(value):
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"""Convert an IntEnum member to a numeric value.
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If it's not a IntEnum member return the value itself.
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"""
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try:
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return int(value)
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except (ValueError, TypeError):
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return value
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@_wraps(_signal.signal)
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def signal(signalnum, handler):
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handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
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return _int_to_enum(handler, Handlers)
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@_wraps(_signal.getsignal)
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def getsignal(signalnum):
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handler = _signal.getsignal(signalnum)
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return _int_to_enum(handler, Handlers)
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if 'pthread_sigmask' in _globals:
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@_wraps(_signal.pthread_sigmask)
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def pthread_sigmask(how, mask):
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sigs_set = _signal.pthread_sigmask(how, mask)
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return set(_int_to_enum(x, Signals) for x in sigs_set)
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pthread_sigmask.__doc__ = _signal.pthread_sigmask.__doc__
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if 'sigpending' in _globals:
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@_wraps(_signal.sigpending)
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def sigpending():
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sigs = _signal.sigpending()
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return set(_int_to_enum(x, Signals) for x in sigs)
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if 'sigwait' in _globals:
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@_wraps(_signal.sigwait)
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def sigwait(sigset):
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retsig = _signal.sigwait(sigset)
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return _int_to_enum(retsig, Signals)
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sigwait.__doc__ = _signal.sigwait
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del _globals, _wraps
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