[RFU][1.3.9-2] pv‏

Aaron Schneider notstop2@users.sourceforge.net
Wed Dec 12 19:42:00 GMT 2012

On 10/12/2012 20:15, Corinna Vinschen wrote:
> Cygwin supports mmap for a long time.  However,  I'm puzzled why
> using POSIX message queues should be more work than implementing
> the message transport from scratch.  This sounds much more error
> prone than using an existing mechanism.

I have never used POSIX message queues, and that would only give me -R 
in any case, since I would still either need shared memory or a new 
positioning algorithm for -c.

Instead, I would open a lock file and use that to co-ordinate which PV 
is the "first" one and where the "top" Y co-ordinate is. I might not 
even need mmap() at all. So long as I'm using lock files for the 
terminal anyway, it seems that I might as well also use them for the 
rest of -c and -R.

So this is why I think it would be easier to use lock files and/or mmap 
than trying to use message queues.

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