[Samba] dcerpc + threads

Jeremy Allison jra at samba.org
Mon Jul 8 12:50:55 MDT 2013

On Mon, Jul 08, 2013 at 11:12:04AM -0700, Ilya Markov wrote:
> I have read that none of the samba code has been written to explicitly support threads, but that there are "sections" are not inherently thread-unsafe (e.g. talloc).
> I am attempting to write a multi-threaded client to interface with a MS RPC server (more specifically read the MS Event Log). My goal (and reasoning behind threads vs processes) is that I would like to establish a connection once, and then have a "random" worker operate on that connection. I considered a multi-process solution, but between sharing the connection and all the talloc'd memory needed to call the dcerpc_ functions, it seemed that it is worth trying to multi-thread the application.
> So my question, in short, is whether any of the dcerpc/tevent/talloc libraries are thread-unsafe? If not, do I need to do something special?

All these libraries are thread unsafe (although talloc with thread-specific
contexts and avoiding the null context is thread-safe I believe - but that's
not how it's used in the other libraries that call it). Wrap usage
of them in mutexes.


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