DAQmxRegisterSignalEvent Callback DAQmx Threads count

[carlitosacm]

Hi,

In NI-DAQmx C Reference, it says that function DAQmxRegisterSignalEvent may receive 0 as options parameter value. In this case, "The callback function is called in a DAQmx thread. This is the default value.". I dont see it clear how many DAQmx threads there are. Which of the following is the DAQmx behavior:

1. There is only one thread and an event queue which are processed in order?

2. There is a pool of threads (more than one) that processes an event queue?

3.  One thread is created for each event.

Thanks for your help,

 Carlos

[Lucianogob]

Hi,

I'm sending to you two links that explain how the function "DAQmxRegisterSignalEvent" works.

http://digital.ni.com/public.nsf/allkb/8E4B9C0E5F68A14F862574AA002FC272?OpenDocument

http://digital.ni.com/public.nsf/allkb/DF5719473800838086256F1E0054FD7B?OpenDocument

Let me know if you have any question.

Regards

Luciano Borges

National Instruments Brazil

Message Edited by Lucianogob on 04-02-2009 03:50 PM