/// <summary>
/// Adds a new work item
/// </summary>
/// <param name="method">The method that represents the work to perform</param>
/// <param name="parameter">Parameter to pass to the work method</param>
/// <returns>An object that can be used to retrieve the result after completion</returns>
public WorkloadInfo <TParam, TResult> AddWorkItem(Action <TParam, WorkloadInfo <TParam, TResult> > method, TParam parameter)
{
var work = new WorkloadInfo <TParam, TResult>(this, parameter, method);
BeginWorkItem(work);
return(work);
}
/// <summary>
/// Schedules a work item to begin
/// </summary>
/// <param name="work">The work to perform</param>
/// <remarks>The worker thread is blocked on the startEvent so that the work
/// doesn't complete before the client is ready to handle the completion event
/// </remarks>
void BeginWorkItem(WorkloadInfo <TParam, TResult> work)
{
lock (this)
{
outstandingItems++;
}
ThreadPool.QueueUserWorkItem(delegate
{
// Wait until it's OK to start
startEvent.WaitOne();
try
{
// Method is responsible for completing itself if it didn't fail
work.Method(work.Parameter, work);
}
catch (Exception ex)
{
// Complete with a failure case
work.NotifyFailure(ex);
}
});
}