On 07/26/2013 03:01 PM, Andi Kleen wrote:
Andrew MacLeod <amacl...@redhat.com> writes:
What it doesn't do:
* It doesn't implement the C11 expression expansion into atomic
built-ins. ie, you can't write:
_Atomic int x;
x = 0;
and have the result be an atomic operation calling
__atomic_store (&x, 0).
How would this work if you want a different memory order?
The way the standard is defined, any implicit operation like that is
seq_cst. If you want something other than seq-cst, you have to
explicitly call atomic_store (&x, 0, model).
C11 also provides all those same atomic routines that c++11 provides for
this reason. They just decided to try to implement the c++ atomic
templates in the language along the way :-P so it feels very much like
c++ atomics...
Andrew
