52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
###############################################################################
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# compat for UNIX 2.7 and 3.3
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# Manager with LokyContext server.
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# This avoids having a Manager using fork and breaks the fd.
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#
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# author: Thomas Moreau and Olivier Grisel
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#
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# based on multiprocessing/managers.py (17/02/2017)
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# * Overload the start method to use LokyContext and launch a loky subprocess
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#
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import multiprocessing as mp
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from multiprocessing.managers import SyncManager, State
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from .process import LokyProcess as Process
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class LokyManager(SyncManager):
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def start(self, initializer=None, initargs=()):
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'''Spawn a server process for this manager object'''
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assert self._state.value == State.INITIAL
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if (initializer is not None
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and not hasattr(initializer, '__call__')):
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raise TypeError('initializer must be a callable')
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# pipe over which we will retrieve address of server
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reader, writer = mp.Pipe(duplex=False)
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# spawn process which runs a server
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self._process = Process(
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target=type(self)._run_server,
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args=(self._registry, self._address, bytes(self._authkey),
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self._serializer, writer, initializer, initargs),
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)
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ident = ':'.join(str(i) for i in self._process._identity)
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self._process.name = type(self).__name__ + '-' + ident
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self._process.start()
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# get address of server
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writer.close()
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self._address = reader.recv()
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reader.close()
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# register a finalizer
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self._state.value = State.STARTED
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self.shutdown = mp.util.Finalize(
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self, type(self)._finalize_manager,
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args=(self._process, self._address, self._authkey,
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self._state, self._Client),
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exitpriority=0
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)
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