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<== Date ==> <== Thread ==>
Subject: Re: pdevLibVirtualOS
From: Michael Davidsaver <[email protected]>
To: Terry Cornall <[email protected]>
Cc: "[email protected]" <[email protected]>
Date: Wed, 23 Mar 2011 10:06:10 -0400
Hello Terry,

pdevLibVirtualOS is a table of function pointers used to implement VME access functions (ie devRegisterAddress()).  When no VME implementation is present, it is NULL.  On Linux this happens in src/libCom/osi/os/default/devLibOSD.c.

You will get an error when a driver tries to use the VME access functions and no implementation is present.  The only OSs for which an implementation is provided in epics base are RTEMS and vxWorks.  There is at least one Linux implementation out there that I know of.  It is based on the kernel driver/user library from GE Fanuc and may not be of use to you.

I hope this answers you question,

Michael


On 3/23/2011 2:21 AM, Terry Cornall wrote:

Can anyone tell me how pdevLibVirtualOS gets initialized?  Or why I might be getting an error indicating that it is NULL?

 

(EPICS_HOST_ARCH=linux-x86 and epics base is 3-14-9 )

 

Thanks.

 

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Terry Cornall | Senior Controls Engineer | Australian Synchrotron
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References:
pdevLibVirtualOS Terry Cornall
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