[Patch, Fortran] Update atomics support for TS18508

[Paul Richard Thomas]

Dear Tobias,

OK for trunk.

Thanks for the patch.

Paul

On 11 July 2014 23:30, Tobias Burnus <burnus@net-b.de> wrote:
> This patch updates the atomic support for TS18508, namely:
> – The atomic intrinsics now take a STAT= argument
> – Add the new atomics atomic_{add,and,or,xor} and their fetch variants
> atomic_fetch_{add,and,or,xor} – and compare and swap (atomic_cas)
>
> In addition, the previous implementation (for -fcoarray=single) used simple
> assignments; the patch changes those to using real atomic operations, which
> makes the atomic operations thread safe.
>
> Build and regtested on x86-64-gnu-linux.
> OK for the trunk?
>
>
> As next step, library calls have to be added for -fcoarray=lib. For
> coarrays, I also a have still on my to do list: Adding a type-conversion
> test case for -fcorray=lib; implementing in the library the support for
> vector subscripts; and fixing an issue with nonallocatable polymorphic dummy
> coarrays and select type.
> For full F2008 support, the following is needed as well: locking and
> critical blocks – and allocatable/pointer components of derived types. For
> TS18508 much more is needed, in particular co_reduce/co_broadcast and team
> support.
>
> Tobias



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