RS232 library multithread safe?

[test_man]

Is RS232 library multithread safe?

Another words, Can I call functions from this library for different ports at the same time?

For example

Can I call following functions at the same time from different thread?

:

written = ComWrt (1, send, strlen(send));

written = ComWrt (2, send, strlen(send));

written = ComWrt (3, send, strlen(send));

[menchar]

NI says that it is.

I think you should be able to call rs-232 library functions on the same port from different threads within the same process too.

Threads from different processes cannot access the same port, however.

You have to take care with the rs232err library global though, it gets updated by all threads so you can have indeterminancy on the value when multi-threaded.  This is all discussed in the on-line help.

Menchar

[Mert_A.]

Yes, the library is thread-safe.  It ensures that calls from different threads do not interfere with each other.  It also does not matter which port you are writing to; you could just as safely write to the same port from multiple threads.

Mert A.
National Instruments

[test_man]

Thanks for your answers. It addresses my concern.