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 an 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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