Question

Have some method, which is called sync like:

tasks.ForEach(p=> Proccess(p));

void Proccess(){
   //do some long running work
}

How can i do something like, on pseudocode:

tasks.ForEach(p=> Async(Proccess(p));
WaitForAny();

Here i want to call tasks async, and wait for any execution end.(not for all).
Can u plz help me, without parallel tasks from .net 4.

Answer 1

Take a look at Task.WaitAny

Task[] tasksToWaitFor = new Task[itemsToCall.Length];
foreach (int i = 0; i < itemsToCall.Length; i++)
{
    var itemToCall = itemsToCall[i];
    tasksToWaitFor[i] = Task.Factory.StartNew( () => itemToCall.Call());
}

await Task.WaitAny(tasksToWaitFor);

http://msdn.microsoft.com/en-us/library/dd270672.aspx