Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / python2.4 / test / test_threading.py

# Very rudimentary test of threading module

# Create a bunch of threads, let each do some work, wait until all are done

from test.test_support import verbose
import random
import threading
import time

# This takes about n/3 seconds to run (about n/3 clumps of tasks, times
# about 1 second per clump).
numtasks = 10

# no more than 3 of the 10 can run at once
sema = threading.BoundedSemaphore(value=3)
mutex = threading.RLock()
running = 0

class TestThread(threading.Thread):
   def run(self):
       global running
       delay = random.random() * 2
       if verbose:
           print 'task', self.getName(), 'will run for', delay, 'sec'
       sema.acquire()
       mutex.acquire()
       running = running + 1
       if verbose:
           print running, 'tasks are running'
       mutex.release()
       time.sleep(delay)
       if verbose:
           print 'task', self.getName(), 'done'
       mutex.acquire()
       running = running - 1
       if verbose:
           print self.getName(), 'is finished.', running, 'tasks are running'
       mutex.release()
       sema.release()

threads = []
def starttasks():
   for i in range(numtasks):
       t = TestThread(name="<thread %d>"%i)
       threads.append(t)
       t.start()

starttasks()

if verbose:
   print 'waiting for all tasks to complete'
for t in threads:
   t.join()
if verbose:
   print 'all tasks done'