private static void OnScheduledWork(object state)
{
Scheduler thisPtr = (Scheduler)state;
// We snapshot these values here so that we can
// use them after calling OnSchedulerIdle.
//bool isTracingEnabled = FxTrace.Trace.ShouldTraceToTraceSource(TraceEventLevel.Informational);
Guid oldActivityId = Guid.Empty;
Guid workflowInstanceId = Guid.Empty;
//if (isTracingEnabled)
//{
// oldActivityId = DiagnosticTraceBase.ActivityId;
// workflowInstanceId = thisPtr.callbacks.WorkflowInstanceId;
// FxTrace.Trace.SetAndTraceTransfer(workflowInstanceId, true);
// if (thisPtr.resumeTraceRequired)
// {
// if (TD.WorkflowActivityResumeIsEnabled())
// {
// TD.WorkflowActivityResume(workflowInstanceId);
// }
// }
//}
thisPtr.callbacks.ThreadAcquired();
RequestedAction nextAction = continueAction;
bool idleOrPaused = false;
while (object.ReferenceEquals(nextAction, continueAction))
{
if (thisPtr.IsIdle || thisPtr.isPausing)
{
idleOrPaused = true;
break;
}
// cycle through (queue->thisPtr.firstWorkItem->currentWorkItem)
WorkItem currentWorkItem = thisPtr.firstWorkItem;
// promote an item out of our work queue if necessary
if (thisPtr.workItemQueue != null && thisPtr.workItemQueue.Count > 0)
{
thisPtr.firstWorkItem = thisPtr.workItemQueue.Dequeue();
}
else
{
thisPtr.firstWorkItem = null;
}
if (TD.ExecuteWorkItemStartIsEnabled())
{
TD.ExecuteWorkItemStart();
}
nextAction = thisPtr.callbacks.ExecuteWorkItem(currentWorkItem);
if (TD.ExecuteWorkItemStopIsEnabled())
{
TD.ExecuteWorkItemStop();
}
}
//bool notifiedCompletion = false;
//bool isInstanceComplete = false;
if (idleOrPaused || object.ReferenceEquals(nextAction, abortAction))
{
thisPtr.isPausing = false;
thisPtr.isRunning = false;
thisPtr.NotifyWorkCompletion();
//notifiedCompletion = true;
//if (isTracingEnabled)
//{
// isInstanceComplete = thisPtr.callbacks.IsCompleted;
//}
// After calling SchedulerIdle we no longer have the lock. That means
// that any subsequent processing in this method won't have the single
// threaded guarantee.
thisPtr.callbacks.SchedulerIdle();
}
else if (!object.ReferenceEquals(nextAction, yieldSilentlyAction))
{
Fx.Assert(nextAction is NotifyUnhandledExceptionAction, "This is the only other option");
NotifyUnhandledExceptionAction notifyAction = (NotifyUnhandledExceptionAction)nextAction;
// We only set isRunning back to false so that the host doesn't
// have to treat this like a pause notification. As an example,
// a host could turn around and call run again in response to
// UnhandledException without having to go through its operation
// dispatch loop first (or request pause again). If we reset
// isPausing here then any outstanding operations wouldn't get
// signaled with that type of host.
thisPtr.isRunning = false;
thisPtr.NotifyWorkCompletion();
//notifiedCompletion = true;
//if (isTracingEnabled)
//{
// isInstanceComplete = thisPtr.callbacks.IsCompleted;
//}
thisPtr.callbacks.NotifyUnhandledException(notifyAction.Exception, notifyAction.Source);
}
//if (isTracingEnabled)
//{
// if (notifiedCompletion)
// {
// if (isInstanceComplete)
// {
// if (TD.WorkflowActivityStopIsEnabled())
// {
// TD.WorkflowActivityStop(workflowInstanceId);
// }
// }
// else
// {
// if (TD.WorkflowActivitySuspendIsEnabled())
// {
// TD.WorkflowActivitySuspend(workflowInstanceId);
// }
// }
// }
// DiagnosticTraceBase.ActivityId = oldActivityId;
//}
}
private static void OnScheduledWork(object state)
{
Scheduler scheduler = (Scheduler)state;
bool flag = FxTrace.Trace.ShouldTraceToTraceSource(TraceEventLevel.Informational);
Guid empty = Guid.Empty;
Guid newId = Guid.Empty;
if (flag)
{
empty = DiagnosticTrace.ActivityId;
newId = scheduler.callbacks.WorkflowInstanceId;
FxTrace.Trace.SetAndTraceTransfer(newId, true);
if (scheduler.resumeTraceRequired && TD.WorkflowActivityResumeIsEnabled())
{
TD.WorkflowActivityResume(newId.ToString());
}
}
scheduler.callbacks.ThreadAcquired();
RequestedAction continueAction = Scheduler.continueAction;
bool flag2 = false;
while (object.ReferenceEquals(continueAction, Scheduler.continueAction))
{
if (scheduler.IsIdle || scheduler.isPausing)
{
flag2 = true;
break;
}
System.Activities.Runtime.WorkItem firstWorkItem = scheduler.firstWorkItem;
if ((scheduler.workItemQueue != null) && (scheduler.workItemQueue.Count > 0))
{
scheduler.firstWorkItem = scheduler.workItemQueue.Dequeue();
}
else
{
scheduler.firstWorkItem = null;
}
continueAction = scheduler.callbacks.ExecuteWorkItem(firstWorkItem);
}
bool flag3 = false;
bool isCompleted = false;
if (flag2 || object.ReferenceEquals(continueAction, abortAction))
{
scheduler.isPausing = false;
scheduler.isRunning = false;
scheduler.NotifyWorkCompletion();
flag3 = true;
if (flag)
{
isCompleted = scheduler.callbacks.IsCompleted;
}
scheduler.callbacks.SchedulerIdle();
}
else if (!object.ReferenceEquals(continueAction, yieldSilentlyAction))
{
NotifyUnhandledExceptionAction action2 = (NotifyUnhandledExceptionAction)continueAction;
scheduler.isRunning = false;
scheduler.NotifyWorkCompletion();
flag3 = true;
if (flag)
{
isCompleted = scheduler.callbacks.IsCompleted;
}
scheduler.callbacks.NotifyUnhandledException(action2.Exception, action2.Source);
}
if (flag)
{
if (flag3)
{
if (isCompleted)
{
if (TD.WorkflowActivityStopIsEnabled())
{
TD.WorkflowActivityStop(newId.ToString());
}
}
else if (TD.WorkflowActivitySuspendIsEnabled())
{
TD.WorkflowActivitySuspend(newId.ToString());
}
}
DiagnosticTrace.ActivityId = empty;
}
}