R devel - Oct 2012 - Multithreaded code in .Call interface

Hi,

I was wondering if it is safe to call R functions and/or R BLAS functions
from within multithreaded C/C++ code(.Call interface)? It is not in case
with MATLAB. I was experimenting  using pthreads and OpenMP.

Thanks,
Rob

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On 13/10/2012 08:09, Rob Anderson wrote:
> Hi,
>
> I was wondering if it is safe to call R functions and/or R BLAS functions
> from within multithreaded C/C++ code(.Call interface)? It is not in case
> with MATLAB. I was experimenting  using pthreads and OpenMP.
Not unless it is documented to be so.  (I believe the internal BLAS to 
be fine, but you could use an external one: although with care if that 
also uses threads.)

See also ?8.1.5 of 'Writing R Extensions'.
> Thanks,
> Rob

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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