internal void TaskLaunchedForMessageHandling(
IDataflowBlock block, Task task, TaskLaunchedReason reason, int availableMessages)
{
Contract.Requires(block != null, "Block needed for the ETW event.");
Contract.Requires(task != null, "Task needed for the ETW event.");
Contract.Requires(reason == TaskLaunchedReason.ProcessingInputMessages || reason == TaskLaunchedReason.OfferingOutputMessages,
"The reason should be a supported value from the TaskLaunchedReason enumeration.");
if (IsEnabled(EventLevel.Informational, ALL_KEYWORDS))
{
TaskLaunchedForMessageHandling(Common.GetBlockId(block), reason, availableMessages, task.Id);
}
}
private void TaskLaunchedForMessageHandling(int blockId, TaskLaunchedReason reason, int availableMessages, int taskId)
{
// There is no explicit WriteEvent() overload matching this event's fields:
// WriteEvent(TASKLAUNCHED_EVENTID, blockId, (int)reason, availableMessages, taskId);
// Therefore this call would hit the "params" overload, which leads to multiple object
// allocations every time this event is fired.
if (t_sharedArray == null)
{
t_sharedArray = new object[4];
}
t_sharedArray[0] = blockId;
t_sharedArray[1] = (int)reason;
t_sharedArray[2] = availableMessages;
t_sharedArray[3] = taskId;
WriteEvent(TASKLAUNCHED_EVENTID, t_sharedArray);
}
private void TaskLaunchedForMessageHandling(int blockId, TaskLaunchedReason reason, int availableMessages, int taskId)
{
WriteEvent(TASKLAUNCHED_EVENTID, blockId, reason, availableMessages, taskId);
}
