[Gambas-user] pigpio c library callback gives segmentation fault (11)

[Steve]

I was trying something like this.  The rest of what you said was what 
had I surmised was going on.

I used 'open pipe "name" for watch'  this blocks and nothing else in 
gambas code happens  until a msg is received.

Looking at this I see 'thePipeFileDescriptor' as being the pipe name. 
Does the '.' imply anything other than it being in the current 
directory? You don't seem to be referring to something like 'FILE'. I'll 
give it a try.

The c code in question is Pigpio (a gpio handler something like 
wiringpi). The 'signal" in question comes from a daemon that this code 
communicates with. Unlike wiringpi, Pigipo has a pin level shift 
actuated interupt and does not use poling.
In this case the pulse is very short compared to the repetition rate and 
capturing it via polling is not doable.

I've done X11 years ago on Unix systems. Not a fun process.


On 11/19/2018 2:14 PM, Benoît Minisini wrote:
>
> hFile = Open "." & CStr(thePipeFileDescriptor) For Read Watch As 
> "SignalHandler"
>
>
> Regards,
>