miscPython/peterson.py at master · jeevi/miscPython · GitHub

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import threading
import time
import logging

B = [0]*2
turn = 9


class Peterson(threading.Thread):

    counter = 10

    logging.basicConfig(level=logging.DEBUG, format='[%(threadName)s, %(message)s]')

    def __init__(self, index):
        self.index = index
        threading.Thread.__init__(self)

    def run(self):

        logging.debug('is starting ...')
        B[self.index] = 1
        turn =  self.index

        #print  threading.currentThread().getName() + " " + str(B[not self.index])
        #print threading.currentThread().getName()+ " " + str(turn)

        while(B[not self.index] is 1 and turn is self.index ):

            logging.debug('waiting ... ')
        enterCS()
        B[self.index] = 0
        #print threading.currentThread().getName() + " " +str(B[self.index])


def enterCS():
    logging.debug('executing in CS ...')
    logging.debug('exiting CS ...')


t0 = Peterson(0)
t1 = Peterson(1)

t0.start()
t1.start()