Create a Task list, with tasks without executing
- by Ernesto Araya Eguren
I have an async method
private async Task DoSomething(CancellationToken token)
a list of Tasks
private List<Task> workers = new List<Task>();
and I have to create N threads that runs that method
public void CreateThreads(int n)
{
tokenSource = new CancellationTokenSource();
token = tokenSource.Token;
for (int i = 0; i < n; i++)
{
workers.Add(DoSomething(token));
}
}
but the problem is that those have to run at a given time
public async Task StartAllWorkers()
{
if (0 < workers.Count)
{
try
{
while (0 < workers.Count)
{
Task finishedWorker = await Task.WhenAny(workers.ToArray());
workers.Remove(finishedWorker);
finishedWorker.Dispose();
}
if (workers.Count == 0)
{
tokenSource = null;
}
}
catch (OperationCanceledException)
{
throw;
}
}
}
but actually they run when i call the CreateThreads Method (before the StartAllWorkers).
I searched for keywords and problems like mine but couldn't find anything about stopping the task from running.
I've tried a lot of different aproaches but anything that could solve my problem entirely.
For example, moving the code from DoSomething into a workers.Add(new Task(async () => { }, token)); would run the StartAllWorkers(), but the threads will never actually start.
There is another method for calling the tokenSource.Cancel().
