R devel - May 2007 - sending signals to embedded R

Hi,

one thing I haven't been able to figure out from R-exts is how to
interrupt a calculation running inside an embedded R. C code inside R
calls R_CheckUserInterrupt() intermittently to check for interrupts,
but how does my GUI tell R that the user wants it interrupted?

-Deepayan

On Fri, 4 May 2007, Deepayan Sarkar wrote:
> one thing I haven't been able to figure out from R-exts is how to
> interrupt a calculation running inside an embedded R. C code inside R
> calls R_CheckUserInterrupt() intermittently to check for interrupts,
> but how does my GUI tell R that the user wants it interrupted?
Well, the intention is that you send an interrupt, which hardly needs to 
be in the manual.

But SIGINT is caught and used to set R_interrupts_pending = 1, so you 
could risk using that non-API entry point (and be prepared to have your 
GUI broken at any time).

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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