Hi Phil, Am Thursday 03 December 2009 15:58:03 schrieb Phil Endecott:
Helge Bahmann wrote:
I will shortly be adding a small howto on adding platform support to the library.
Please let me know when this is ready. I currently have a bit of time to spend on this.
There is one planned internal API change (switching to the four-parameter compare_exchange_*) still pending, but that should be straight-forward afterwards. If you want to try, I have started writing things up, the current state is at: http://www.chaoticmind.net/~hcb/projects/boost.atomic/doc/architecture_suppo... (the tarball also contains the generated docs, still busy reworking to use boostdoc)
In summary, the cases that I need to handle are:
1. Linux kernel provided memory-barrier and CAS operations (only);
does any of these arm platforms (this is pre-v6 probably?) actually support smp? if not, then the barriers will probably be NOPs
2. Asm load-locked/store-conditional for words (only); 3. As 2 but also for smaller types.
sounds like this is going to be one of the most complicated platforms, so I really appreciate your experience here...
I could probably work this out from the source, but it would save some time to have some hints....
It's probably still required to delve into the source, but I hope that the write-up provides a good entry point (but of course don't hesitate on commenting, there is lots of things to improve). Best regards Helge