[Spice_discussion] SPICE and multi-threading?

[Bridgman, William T.]

Has anyone on the list used SPICE in a multi-core, multi-thread environment?  Basically calling SPICE in multiple threads sharing the same memory on a multi-core processor(s).

I’ve tried this launching multiple instances of python-wrapped SPICE for the case where I’m retrieving position snapshots of the same set of spacecraft and planets, but at multiple times (for generating animations).  The results were inconsistent and I switched back to single thread operation.

If SPICE is thread-safe, then I’ve probably done something wrong (perhaps not completely initializing or closing SPICE for each thread?)

Are there any guidelines available?

Thanks,
Tom
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Dr. William T."Tom" Bridgman               Scientific Visualization Studio
Global Science & Technology, Inc.          NASA/Goddard Space Flight Center
Email: William.T.Bridgman at nasa.gov         Code 606.4
Phone: 301-286-1346                        Greenbelt, MD 20771
FAX:   301-286-1634                        http://svs.gsfc.nasa.gov/