Notify when thread is complete, without locking calling thread

Question

I am working on a legacy application that is built on top of NET 3.5. This is a constraint that I can\'t change. I need to execute a second thread to run a long running tas

Answer 1

Maybe using conditional variables and mutex, or some functions like wait(), signal(), maybe timed wait() to not block main thread infinitely.

In C# this will be:

   void Notify()
{
    lock (syncPrimitive)
    {
        Monitor.Pulse(syncPrimitive);
    }
}

void RunLoop()
{

    for (;;)
    {
        // do work here...

        lock (syncPrimitive)
        {
            Monitor.Wait(syncPrimitive);
        }
    }
}

more on that here: Condition Variables C#/.NET

It is the concept of Monitor object in C#, you also have version that enables to set timeout

public static bool Wait(
   object obj,
   TimeSpan timeout
)

more on that here: https://msdn.microsoft.com/en-us/library/system.threading.monitor_methods(v=vs.110).aspx