On Fri, 22 Oct 2004, Olivier Tarnus wrote:
Hi all,
I was wondering if it's possible to open multiple contexts and specifying
them in pmFetch or pmLookupDesc... I want to get multiple data from multiple
hosts in the same program, and as pmapi is not thread safe, the only
alternative would be to go multi-process and opening contexts in each
process.
However this would greaty complicate access to gathered data, so is fork() my
only alternative???
Creating multiple contexts is not a problem.
Having multiple threads calling libpcp at the same time is going
to get you into strife.
All the PCP applications we've developed do round-robin fetches from
multiple hosts using a single thread for all libpcp calls ... in practice
this has worked out just fine.
If you have a counter example where this does not work, I'd be interested
in hearing about it.
The alternative of making libpcp thread-safe is a homework project for
someone who's very keen ... it is not on my resourced roadmap ... 8^)>
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