12 Jul
2011
12 Jul
'11
7:40 a.m.
For a ringbuffer you need two anyway if the buffer is
longer than
one item, and you want to signal both of 'not empty' and 'not full'
in the appropriate direction.
Well, if one of the threads is periodic (like a Jack process thread)
it can use sem_getvalue() on the same semaphore to figure things out
-- it doesn't need to be signalled on another semaphore. There are
some small complications that can be solved by double-signalling from
the other thread, or by wasting one slot...
-- Dan