66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# 2016-2017 Darko Poljak (darko.poljak at gmail.com)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import multiprocessing
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import concurrent.futures as cf
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import itertools
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import os
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import signal
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import logging
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log = logging.getLogger("cdist-mputil")
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def mp_sig_handler(signum, frame):
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log.trace("signal %s, SIGKILL whole process group", signum)
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os.killpg(os.getpgrp(), signal.SIGKILL)
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def mp_pool_run(func, args=None, kwds=None, jobs=multiprocessing.cpu_count()):
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"""Run func using concurrent.futures.ProcessPoolExecutor with jobs jobs
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and supplied iterables of args and kwds with one entry for each
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parallel func instance.
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Return list of results.
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"""
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if args and kwds:
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fargs = zip(args, kwds)
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elif args:
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fargs = zip(args, itertools.repeat({}))
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elif kwds:
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fargs = zip(itertools.repeat(()), kwds)
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else:
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return [func(), ]
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retval = []
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with cf.ProcessPoolExecutor(jobs) as executor:
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try:
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results = [
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executor.submit(func, *a, **k) for a, k in fargs
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]
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for f in cf.as_completed(results):
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retval.append(f.result())
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return retval
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except KeyboardInterrupt:
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mp_sig_handler(signal.SIGINT, None)
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raise
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