[LAD] jack ringbuffer question

[lieven moors]

Paul Davis wrote:
> On Tue, Dec 1, 2009 at 9:51 PM, lieven moors <lievenmoors at gmail.com> wrote:
>
>   
>> 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?
Should I use __sync_val_compare_and_swap from GCC?
I've been looking around for other libraries, but I'm not sure where to 
start.
Also, what did you mean with 'integer exchange'?
Is it yet another way of using CAS?

Thanks in advance,

Lieven
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