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# -*- coding: utf-8 -*-
# Copyright © 2007-2008 Stockholm TreeAligner Project
# Author: Torsten Marek <shlomme@gmx.net>
# Licensed under the GNU GPLv2
"""Support module for using the `multiprocessing` module."""
try:
import processing as multiprocessing
HAS_PROCESSING = True
except ImportError:
try:
import multiprocessing
HAS_PROCESSING = True
except ImportError:
HAS_PROCESSING = False
__all__ = ["use_parallel_processing"]
if HAS_PROCESSING:
CPU_COUNT = multiprocessing.cpuCount()
else:
CPU_COUNT = 1
multiprocessing = None
def use_parallel_processing():
"""Returns `True` if the query evaluator can run parallelized, `False` otherwise.
For the parallelized version, two conditions have to be fulfilled:
* the `multiprocessing` module is present
* the system has more than one CPU
"""
return HAS_PROCESSING and CPU_COUNT > 1
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