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import _signal
from _signal import *
from enum import IntEnum as _IntEnum
_globals = globals()
_IntEnum._convert_(
'Signals', __name__,
lambda name:
name.isupper()
and (name.startswith('SIG') and not name.startswith('SIG_'))
or name.startswith('CTRL_'))
_IntEnum._convert_(
'Handlers', __name__,
lambda name: name in ('SIG_DFL', 'SIG_IGN'))
if 'pthread_sigmask' in _globals:
_IntEnum._convert_(
'Sigmasks', __name__,
lambda name: name in ('SIG_BLOCK', 'SIG_UNBLOCK', 'SIG_SETMASK'))
def _int_to_enum(value, enum_klass):
"""Convert a possible numeric value to an IntEnum member.
If it's not a known member, return the value itself.
"""
if not isinstance(value, int):
return value
try:
return enum_klass(value)
except ValueError:
return value
def _enum_to_int(value):
"""Convert an IntEnum member to a numeric value.
If it's not an IntEnum member return the value itself.
"""
try:
return int(value)
except (ValueError, TypeError):
return value
# Similar to functools.wraps(), but only assign __doc__.
# __module__ should be preserved,
# __name__ and __qualname__ are already fine,
# __annotations__ is not set.
def _wraps(wrapped):
def decorator(wrapper):
wrapper.__doc__ = wrapped.__doc__
return wrapper
return decorator
@_wraps(_signal.signal)
def signal(signalnum, handler):
handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
return _int_to_enum(handler, Handlers)
@_wraps(_signal.getsignal)
def getsignal(signalnum):
handler = _signal.getsignal(signalnum)
return _int_to_enum(handler, Handlers)
if 'pthread_sigmask' in _globals:
@_wraps(_signal.pthread_sigmask)
def pthread_sigmask(how, mask):
sigs_set = _signal.pthread_sigmask(how, mask)
return set(_int_to_enum(x, Signals) for x in sigs_set)
if 'sigpending' in _globals:
@_wraps(_signal.sigpending)
def sigpending():
return {_int_to_enum(x, Signals) for x in _signal.sigpending()}
if 'sigwait' in _globals:
@_wraps(_signal.sigwait)
def sigwait(sigset):
retsig = _signal.sigwait(sigset)
return _int_to_enum(retsig, Signals)
if 'valid_signals' in _globals:
@_wraps(_signal.valid_signals)
def valid_signals():
return {_int_to_enum(x, Signals) for x in _signal.valid_signals()}
del _globals, _wraps
|
