ThreadBarrier.py :  » Test » pyUnitPerf » pyunitperf » Python Open Source

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Python Open Source » Test » pyUnitPerf 
pyUnitPerf » pyunitperf » ThreadBarrier.py
"""
 * The <code>ThreadBarrier</code> class provides a callback
 * method for threads to signal their completion. 
 *
 * @author <b>Mike Clark</b>
 * @author Clarkware Consulting, Inc.
 **************************************
 * Ported to Python by Grig Gheorghiu *
 **************************************
"""

class ThreadBarrier:

  def __init__(self, numDispatched):
    """
    Constructs a <code>ThreadBarrier</code> with the
    specified number of threads to wait for.
    
    @param numDispatched Number of threads dispatched.
    """
    self.returnedCount = 0
    self.dispatchedCount = numDispatched

  def onCompletion(self, t):
    """
    Called when the specified thread is complete.

    @param t Completed thread.
    """
    self.returnedCount += 1

  def isReached(self):
    """
    Determines whether the thread barrier has been reached -
    when all dispatched threads have returned.

    @return <code>true</code> if the barrier has been reached;
        <code>false</code> otherwise.
    """
    return (self.returnedCount >= self.dispatchedCount)


  def cancelThreads(self, threadCount):
    """
    Cancels the specified number of threads.

    @param threadCount Number of threads to cancel.
    """
    self.returnedCount += threadCount
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