On Tue, Dec 12, 2006 at 04:42:50PM +0800, hanwen wrote:
> Hi,
>
> I'm intersting with the buffer mechanism of GNU Radio. Is there any document
> about it? Or can someone explain it to me.
>
> Many THANKS!
Hi Hanwen,
I'm not exactly sure what level of detail you're looking for, but here
goes...
It's basically a single writer, multiple reader FIFO with the FIFO
implemented as circular buffer using an MMU trick.
The high level interface is in gr_buffer.{h,cc}.
The circular buffer via MMU trick is factored out into
gr_vmcircbuf*.{h,cc}. The abstract interface to the trick is in
gr_vmcircbuf.h
http://www.gnu.org/software/gnuradio/doc/classgr__buffer.html
See especially the collaboration diagram for gr_block:;
http://www.gnu.org/software/gnuradio/doc/classgr__block.html
After taking a look at the code, let me know if you've got more
questions.
Eric
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