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annotate Lib/test/test_threading.py @ 27998:e27f58a50737 legacy-trunk

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SF bug #690377: Dud footnote reference in distutils docs
author Raymond Hettinger <python@rcn.com>
date Fri, 21 Feb 2003 02:47:09 +0000
parents aa0d2d51fbde
children cc27b249755d
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1 # Very rudimentary test of threading module
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2
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3 # Create a bunch of threads, let each do some work, wait until all are done
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4
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5 from test.test_support import verbose
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6 import random
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7 import threading
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8 import time
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9
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10 # This takes about n/3 seconds to run (about n/3 clumps of tasks, times
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11 # about 1 second per clump).
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12 numtasks = 10
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13
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14 # no more than 3 of the 10 can run at once
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15 sema = threading.BoundedSemaphore(value=3)
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16 mutex = threading.RLock()
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17 running = 0
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18
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19 class TestThread(threading.Thread):
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20 def run(self):
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21 global running
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22 delay = random.random() * 2
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23 if verbose:
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24 print 'task', self.getName(), 'will run for', delay, 'sec'
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25 sema.acquire()
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26 mutex.acquire()
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27 running = running + 1
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28 if verbose:
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29 print running, 'tasks are running'
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30 mutex.release()
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31 time.sleep(delay)
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32 if verbose:
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33 print 'task', self.getName(), 'done'
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34 mutex.acquire()
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35 running = running - 1
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36 if verbose:
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37 print self.getName(), 'is finished.', running, 'tasks are running'
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38 mutex.release()
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39 sema.release()
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40
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41 threads = []
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42 def starttasks():
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43 for i in range(numtasks):
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44 t = TestThread(name="<thread %d>"%i)
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45 threads.append(t)
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46 t.start()
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47
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48 starttasks()
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49
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50 if verbose:
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51 print 'waiting for all tasks to complete'
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52 for t in threads:
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53 t.join()
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54 if verbose:
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55 print 'all tasks done'