// TAP
internal PageAsyncTask(Func <CancellationToken, Task> handler, SynchronizationContextMode currentMode)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
// The legacy PageAsyncTaskManager doesn't support TAP methods
SynchronizationContextUtil.ValidateMode(currentMode, requiredMode: SynchronizationContextMode.Normal, specificErrorMessage: SR.SynchronizationContextUtil_TaskReturningPageAsyncMethodsNotCompatible);
TaskHandler = handler;
}
// APM
internal PageAsyncTask(BeginEventHandler beginHandler, EndEventHandler endHandler, EndEventHandler timeoutHandler, Object state, bool executeInParallel, SynchronizationContextMode currentMode)
{
if (beginHandler == null)
{
throw new ArgumentNullException("beginHandler");
}
if (endHandler == null)
{
throw new ArgumentNullException("endHandler");
}
// Only the legacy PageAsyncTaskManager supports timing out APM methods or executing them in parallel
if (timeoutHandler != null || executeInParallel)
{
SynchronizationContextUtil.ValidateMode(currentMode, requiredMode: SynchronizationContextMode.Legacy, specificErrorMessage: SR.SynchronizationContextUtil_PageAsyncTaskTimeoutHandlerParallelNotCompatible);
}
BeginHandler = beginHandler;
EndHandler = endHandler;
TimeoutHandler = timeoutHandler;
State = state;
ExecuteInParallel = executeInParallel;
}
