IBWAIT in multithreaded NT C++ code

[Donald Canfield]

I am writing a multithreaded instrument control program in Visual C++ on Win
NT 4.
I have one thread that handles a service request (SRQ) by using IBWAIT
to wait for an SRQ from the device. While IBWAIT has the thread suspended,
I can not do any GPIB operations from other threads (i.e. IBDEV). All other
GPIB calls hang until the IBWAIT in another thread returns. Does IBWAIT
suspend driver operations? Should I be handling SRQ in a different manner
such as IBNOTIFY or simply doing a serial poll periodically?

Thanks
Don

[Mark Eckdahl]

The ibwait will asyncronously do the work and not tie up the thread if you
do ibwait(0), So that it doesn't tie up the thread waiting for a status
to equal the mask.


"Donald Canfield" wrote:
>>I am writing a multithreaded instrument control program in Visual C++ on
Win>NT 4. >I have one thread that handles a service request (SRQ) by using
IBWAIT>to wait for an SRQ from the device. While IBWAIT has the thread suspended,>I
can not do any GPIB operations from other threads (i.e. IBDEV). All other>GPIB
calls hang until the IBWAIT in another thread returns. Does IBWAIT>suspend
driver operations? Should I be handling SRQ in a different manner>such as
IBNOTIFY or simply doing a serial poll periodically?> >Thanks>Don