private static Tuple <double, double, bool> Run(ITopNSort <MyKeyValue <int, string> > topNSort, int totalNumberOfItems, int selectedNumberOfItems, int arrayPreparationIndex)
{
MyKeyValue <int, string>[] numbers = null;
Stopwatch wallClock = new Stopwatch();
ProcessUserTime processUserTime = new ProcessUserTime();
switch (arrayPreparationIndex)
{
case 0:
numbers = ArrayExtensions.CreateOrderedMKVArray(totalNumberOfItems);
break;
case 1:
numbers = ArrayExtensions.CreateReverseOrderedMKVArray(totalNumberOfItems);
break;
case 2:
numbers = ArrayExtensions.CreateRandomMKVArray(totalNumberOfItems, new Random());
break;
}
// Measure the sorting.
wallClock.Restart();
processUserTime.Restart();
MyKeyValue <int, string>[] result = topNSort.TopNSort(numbers, selectedNumberOfItems);
processUserTime.Stop();
wallClock.Stop();
return
(new Tuple <double, double, bool>(wallClock.Elapsed.TotalSeconds,
processUserTime.ElapsedTotalSeconds,
ArrayExtensions.VerifySorted <MyKeyValue <int, string> >(result)));
}
private void ToRun()
{
RunIsEnabled = false;
Task[] startSelecting = new Task[AvailableTopNSortAlgorithms.Length];
Task[] endSelecting = new Task[AvailableTopNSortAlgorithms.Length];
for (int i = 0; i < AvailableTopNSortAlgorithms.Length; i++)
{
ITopNSort <MyKeyValue <int, string> > s = AvailableTopNSortAlgorithms[i];
startSelecting[i] = new Task(() => {});
endSelecting[i] = startSelecting[i].ContinueWith(t => {
// Render the initialization to the UI.
ResultLog += "Algorithm " + s.Name + ": Started with selecting " + SelectedNumberOfItems +
" from total " + TotalNumberOfItems +
" prepared as '" + AvailableArrayPreparation[ArrayPreparationIndex] +
"'." + Environment.NewLine;
}, TaskScheduler.FromCurrentSynchronizationContext()).ContinueWith(t => {
// Run in the background a long computation which generates a result.
return(Run(s, TotalNumberOfItems, SelectedNumberOfItems, ArrayPreparationIndex));
}).ContinueWith(t => {
// Render the result on the UI.
ResultLog += "Algorithm " + s.Name + " behaved " +
(t.Result.Item3 ? "ok" : "failed") + ": " +
t.Result.Item1.ToString() + " wall clock sec. " +
t.Result.Item2.ToString() + " processor user time sec." +
Environment.NewLine;
}, TaskScheduler.FromCurrentSynchronizationContext());
}
Task start = new Task(() => {
for (int i = 0; i < startSelecting.Length; i++)
{
startSelecting[i].RunSynchronously();
endSelecting[i].Wait();
}
});
start.ContinueWith(t => {
// Enable the start button.
RunIsEnabled = true;
}, TaskScheduler.FromCurrentSynchronizationContext());
start.Start();
}
