/// <summary>
/// Merges columns of the result table in parallel.
/// Each thread askes for a column to merge from a column distributor.
/// If there are no more columns to merge, the thread finishes.
/// </summary>
private void MergeByColumn()
{
var columnDistributor = new ColumnDistributor(this.results.ColumnCount);
var mergeColumnJob = new ParallelMergeColumnJob(columnDistributor, this.results);
int threadsToUse = (this.helper.ThreadCount < this.results.ColumnCount ?
this.helper.ThreadCount : this.results.ColumnCount);
// -1 because the main app thread will work as well.
Task[] tasks = new Task[threadsToUse - 1];
for (int i = 0; i < tasks.Length; i++)
{
tasks[i] = Task.Factory.StartNew(() => DFSParallelPatternMatcher.ParallelMergeColumnWork(mergeColumnJob));
}
DFSParallelPatternMatcher.ParallelMergeColumnWork(mergeColumnJob);
Task.WaitAll(tasks);
}
public ParallelMergeColumnJob(ColumnDistributor columnDistributor, MatchFixedResults matcherResults)
{
this.matcherResults = matcherResults;
this.columnDistributor = columnDistributor;
}