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Copy pathpatterns.py
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51 lines (38 loc) · 1.58 KB
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#!/usr/bin/env python
"""Design pattern support for python-csp.
Copyright (C) Sarah Mount, 2010.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A ParTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have rceeived a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
__author__ = 'Sarah Mount <s.mount@wlv.ac.uk>'
__date__ = 'May 2010'
import os
if os.environ.has_key('CSP'):
if os.environ['CSP'] == 'PROCESSES':
from csp.cspprocess import Par
elif os.environ['CSP'] == 'THREADS':
from csp.cspthread import Par
else:
from csp.cspprocess import Par
del os
from CChannel import CChannel as Channel
__all__ = ['TokenRing']
class TokenRing(Par):
def __init__(self, func, size, numtoks=1):
self.chans = [Channel() for channel in xrange(size)]
self.procs = [func(index=i,
tokens=numtoks,
numnodes=size,
inchan=self.chans[i-1],
outchan=self.chans[i]) for i in xrange(size)]
super(TokenRing, self).__init__(*self.procs)
return