Lucene.Net.Index.IndexWriter.FinishMerges C# (CSharp) Method

		private void  FinishMerges(bool waitForMerges)
		{
			lock (this)
			{
				if (!waitForMerges)
				{
					
					stopMerges = true;
					
					// Abort all pending & running merges:
					foreach(MergePolicy.OneMerge merge in pendingMerges)
					{
						if (infoStream != null)
							Message("now abort pending merge " + merge.SegString(directory));
						merge.Abort();
						MergeFinish(merge);
					}
					pendingMerges.Clear();
					
					foreach(MergePolicy.OneMerge merge in runningMerges)
					{
						if (infoStream != null)
							Message("now abort running merge " + merge.SegString(directory));
						merge.Abort();
					}
					
					// Ensure any running addIndexes finishes.  It's fine
					// if a new one attempts to start because its merges
					// will quickly see the stopMerges == true and abort.
					AcquireRead();
					ReleaseRead();
					
					// These merges periodically check whether they have
					// been aborted, and stop if so.  We wait here to make
					// sure they all stop.  It should not take very long
					// because the merge threads periodically check if
					// they are aborted.
					while (runningMerges.Count > 0)
					{
						if (infoStream != null)
							Message("now wait for " + runningMerges.Count + " running merge to abort");
						DoWait();
					}
					
					stopMerges = false;
					System.Threading.Monitor.PulseAll(this);
					
					System.Diagnostics.Debug.Assert(0 == mergingSegments.Count);
					
					if (infoStream != null)
						Message("all running merges have aborted");
				}
				else
				{
					// waitForMerges() will ensure any running addIndexes finishes.  
					// It's fine if a new one attempts to start because from our
					// caller above the call will see that we are in the
					// process of closing, and will throw an
					// AlreadyClosedException.
					WaitForMerges();
				}
			}
		}