From: [email protected] [mailto:tech-talk-
> On 2013-04-19 [email protected] wrote:
> > I've just discovered that calling ca_context_create(1) after
> > iocInit() appears to succeed (it returns ECA_NORMAL) ... but the
> > resulting context is not very healthy! In my particular case I find that
> > ca_array_get_callback delivers zero length data, but I expect other deeper
> > problems are to be found.
I have just attempted to reproduce this problem in a standalone fragment of code (the problem was previously occurring in a complex and dynamic Python program) ... and so far have completely failed! I'll post an update if I succeed in pinning the problem down more closely.
> Is your code running in the main thread, or its own private thread?
This is code all called from the main thread.
> You can use ca_current_context() to find out if there is context set for the
> current thread yet. This returns a NULL pointer if no context has been
> created yet. If the result is not NULL you may be able to use the
> undocumented (and mis-spelled) routine (with a prototype in cadef.h)
> int ca_preemtive_callback_is_enabled(void);
> to find out whether that context is preemptive or not.
This was very helpful (yes, what a horrible typo, it threw me for a while, as it's somehow quite hard to spot). Turns out I *am* the first create the CA context, and as I've noted above, I can't reproduce the problem in isolation yet ... will carry on digging and will report if I find anything.
- References:
- Calling ca_context_create(1) too late michael.abbott
- Re: Calling ca_context_create(1) too late Andrew Johnson
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