Re: epicsMessageQueue Linux PREEMPT_RT

[Andrew Johnson <anj@aps.anl.gov>]

On Friday 28 January 2011 12:30:59 Eric Norum wrote:
> From the indenting style I infer that Marty Kraimer wrote the code and had
> me commit it......

Marty *never* uses GNU-style function definitions (putting the routine name at 
the beginning of a new line after the return type and any decorations), so I 
still think this had to be your code.  He might have written the vxWorks 
implementation, but I doubt that you would have listed yourself as the Author 
if that was the case.

The vxWorks implementation doesn't appear to need anything like an eventNode, 
and I'm wondering if the free-list is even necessary — couldn't the eventNode 
just be allocated on the stack of the thread that's waiting?  Every call to 
getEventNode() is followed after the epicsEventWait*() by a line that puts it 
back on the eventFreeList.  I guess the important question is how much work it 
would be to create a new epicsEventId every time.

- Andrew
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