RS232 library threadsafe operation

[Scott Trosper]

Are there any concerns with using the RS232 library in a multithread operation as long as I do not attempt to access the same port from different threads? I am interested in using InstallComCallback to trigger on a received character. The multiple threads are generated by TestStand calling CVI routines for multiple UUTs in a batch sequence file model.

[Chris Matthews]

No, the RS232 library is designed to be thread-safe and protect against simultaneous access.

Chris Matthews
National Instruments

[Scott Trosper]

Thanks Chris,

I had one other related question on the InstallComCallback. How do the port timeouts interact with the callback function. I was looking for something in the EventMask that would allow a port timeout to trigger the callback, but I did not see any way of setting this up.

Thanks,
Scott Trosper

[Chris Matthews]

The callback can't be used to detect errors (except line status errors). You would have to check for a timeout or other errors by checking the return values of your RS232 functions (like ComRd) or by using the ReturnRS232Err and GetRS232ErrorString functions.

Best Regards,

Chris Matthews
National Instruments