Joseph S. Myers wrote:
On Thu, 6 May 2010, Andrew MacLeod wrote:
- Implementation of atomic variables and synchronization modes
as well as a new infrastructure to test these types of things.
I presume you've read the long thread starting at
<http://gcc.gnu.org/ml/gcc/2009-08/msg00199.html> regarding the issues
involved in implementing the atomics (involving compiler and libc
cooperation to provide stdatomic.h), and in particular ensuring that code
built for one CPU remains safe on later CPU variants that may have more
native atomic operations.
Im not actually doing the implementation of Atomics themselves right
now, Lawrence is looking at that. Im focusing on the GCC optimization
requirements, changes and testing. I'll leave issues like you point out
there to the guys like like that stuff :-)
I couldn't understand a lot of the atomic synchronization stuff from
existing documentation, so I figured that part might help others
understand it better too. It still gives me a headache.
Andrew
