Re: [LAD] jack ringbuffer question - Linux-audio-dev

2 Dec 2009

lieven moors:
...

  I want to repeat the same Arp, until there is an
update to the text file.
 One arp is allready
 loaded in each ringbuffer in main(). When the file is modified, a second one
 is added, and
 process skips to the second one. Since I have only space for two arps in the
 buffer, there
 should always be exactly one which is readable. I know it is a bit weird,
 but it seems to
 work, apart from the problem I described.

 sounds as if you might want to look into atomic pointer and/or integer
 exchange instead, to get lock-free double buffering.

 ringbuffers are generally for passing streaming data/events.

 Could you give me a hint on how to use atomic pointers? 
I've used the lockless lifo/fifo-queue implementations found in
midishare a few times. Those are really simple to use:
http://midishare.sourceforge.net/