/// <summary>
/// Initializes a new instance of the <see cref="Scheduler"/> class.
/// </summary>
/// <param name="errorHandler">Error handler function.</param>
/// <param name="threadCount">Scheduler thread count.</param>
/// <param name="allowSchedulingOnExternalThreads">Allow scheduling on external threads.</param>
/// <param name="name">Scheduler name.</param>
/// <param name="clock">Optional clock to use (defaults to virtual time offset of DateTime.MinValue and dilation factor of 0).</param>
public Scheduler(Func <Exception, bool> errorHandler, int threadCount = 0, bool allowSchedulingOnExternalThreads = false, string name = "default", Clock clock = null)
{
this.name = name;
this.errorHandler = errorHandler;
this.threadSemaphore = new SimpleSemaphore((threadCount == 0) ? Environment.ProcessorCount * 2 : threadCount);
this.allowSchedulingOnExternalThreads = allowSchedulingOnExternalThreads;
this.globalWorkitems = new WorkItemQueue(name);
this.futureWorkitems = new FutureWorkItemQueue(name + "_future", this);
// set virtual time such that any scheduled item appears to be in the future and gets queued in the future workitem queue
// the time will change when the scheduler is started, and the future workitem queue will be drained then as appropriate
this.clock = clock ?? new Clock(DateTime.MinValue, 0);
this.delayFutureWorkitemsUntilDue = true;
}
public Scheduler(DeliveryPolicy globalPolicy, Func <Exception, bool> errorHandler, int threadCount = 0, bool allowSchedulingOnExternalThreads = false, string name = "default")
{
this.globalPolicy = globalPolicy;
this.errorHandler = errorHandler;
this.threadSemaphore = new SimpleSemaphore((threadCount == 0) ? Environment.ProcessorCount * 2 : threadCount);
this.allowSchedulingOnExternalThreads = allowSchedulingOnExternalThreads;
this.globalWorkitems = new WorkItemQueue(name);
this.futureWorkitems = new FutureWorkItemQueue(name + "_future", this);
this.futuresThread = new Thread(new ThreadStart(this.ProcessFutureQueue));
Platform.Specific.SetApartmentState(this.futuresThread, ApartmentState.MTA);
// set virtual time such that any scheduled item appears to be in the future and gets queued in the future workitem queue
// the time will change when the scheduler is started, and the future workitem queue will be drained then as appropriate
this.clock = new Clock(DateTime.MinValue, 0);
this.delayFutureWorkitemsUntilDue = true;
}