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<== Date ==> <== Thread ==>

Subject: Re: ca_flush_io and threads
From: Dirk Zimoch <dirk.zimoch@psi.ch>
To: michael.abbott@diamond.ac.uk
Cc: tech-talk@aps.anl.gov
Date: Mon, 12 Mar 2012 10:56:52 +0100
Hi Michael,

If you have "third party" threads that have to work with CA, e.g. call ca_flush_io(), it is necessary that they join the main CA context. Otherwise they will start their own unrelated context.

Get a context handle from the main thread with ca_current_context() after calling ca_context_create(). Then in your third party thread, call ca_attach_context() with that context handle.

Dirk


michael.abbott@diamond.ac.uk wrote:
I've just discovered that ca_flush_io() only appears to have an effect on IO requests generated by the calling thread and calling ca_flush_io() from an unrelated thread appears to be a no-op.  Is this deliberate?  I can't see any hint of this behaviour in the documentation, which uses the simple phrase "Flush outstanding IO requests to the server."  I was expecting the effect to be process wide.



Replies:
RE: ca_flush_io and threads michael.abbott
References:
ca_flush_io and threads michael.abbott

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