On 05/06/2015 06:41 PM, Sandra Loosemore wrote:
On 05/06/2015 03:22 PM, Andrew MacLeod wrote:
gcc
* c-family/c-common.c (const struct attribute_spec c_common_att):
Add "atomic" attribute.
(handle_atomic_attribute): New. Deal with __attribute__((atomic)).
(resolve_overloaded_builtin): If an atomic object is passed by
address
at an __atomic function, cast the atomic-ness away for processing.
* c-family/c-pretty-print.c (pp_c_cv_qualifiers): Print attribute
when not ISO c11.
libstdc++-v3
* include/bits/atomic_base.h (struct __atomic_base): Make
template type
use attribute__((atomic)).
(template __atomic_base<_PTp*>): Likewise.
* include/std/atomic (template atomic<_Tp>): Likewise.
* testsuite/29_atomics/atomic/60695.cc: Adjust error line number.
I see no documentation here....
-Sandra
There is none as yet.. its just a WIP... Over the past year or so I've
had a few people inquire into what ever happened to it and/or expressed
an interest in finishing it... I extracted it from the old branch and
brought it up to a compile-able state. Whether its extended to work
just on types, or flushed out to be virtually the same as C11 _Atomic,
or eventually abandoned remains to be seen..
All c++ needs is a hook into the type and size of an atomic... maybe it
can be tweaked instead to just provide an object with the size and
alignment of an atomic object, but not actually be atomic. C++ doesn't
actually need an atomic object... That is probably the simplest thing
to do...
we can document however it ends up.
Andrew
