Commit 82fb139

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Create access_to_resources.py

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	`1`	`+import logging`
	`2`	`+import random`
	`3`	`+import threading`
	`4`	`+import time`
	`5`	`+`
	`6`	`+logging.basicConfig(level=logging.DEBUG,`
	`7`	`+ format='(%(threadName)-10s) %(message)s',`
	`8`	`+ )`
	`9`	`+`
	`10`	`+class Counter(object):`
	`11`	`+ def __init__(self, start=0):`
	`12`	`+ self.lock = threading.Lock()`
	`13`	`+ self.value = start`
	`14`	`+ def increment(self):`
	`15`	`+ logging.debug('Waiting for lock')`
	`16`	`+ self.lock.acquire()`
	`17`	`+ try:`
	`18`	`+ logging.debug('Acquired lock')`
	`19`	`+ self.value = self.value + 1`
	`20`	`+ finally:`
	`21`	`+ self.lock.release()`
	`22`	`+`
	`23`	`+def worker(c):`
	`24`	`+ for i in range(2):`
	`25`	`+ pause = random.random()`
	`26`	`+ logging.debug('Sleeping %0.02f', pause)`
	`27`	`+ time.sleep(pause)`
	`28`	`+ c.increment()`
	`29`	`+ logging.debug('Done')`
	`30`	`+`
	`31`	`+counter = Counter()`
	`32`	`+for i in range(2):`
	`33`	`+ t = threading.Thread(target=worker, args=(counter,))`
	`34`	`+ t.start()`
	`35`	`+`
	`36`	`+logging.debug('Waiting for worker threads')`
	`37`	`+main_thread = threading.currentThread()`
	`38`	`+for t in threading.enumerate():`
	`39`	`+ if t is not main_thread:`
	`40`	`+ t.join()`
	`41`	`+logging.debug('Counter: %d', counter.value)`

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