[PD-dev] lock-free fifo

[Thomas Grill]

Hi Tim, hi all,
i was just looking at your lock-free fifo code in devel_0_38, to adapt 
it for a more general C++ container in flext.
It seems that the x86 CAS/CAS2 fragment are ok, but not the PPC CAS2 code.
http://www.go-ecs.com/ppc/ppctek1.htm#semsupp says that lwarx/stwcx 
instruction can not be nested, because there is only one memory watcher 
per cpu available.
On the other hand, maybe there's a way to exploit that the memory 
watching unit always looks at an entire cache line (64 bytes)?!
I don't know.....

best greetings,
Thomas