PING! [PATCH, Fortran, accaf, v1] Add caf-API-calls to asynchronously handle allocatable components in derived type coarrays.

[Jerry DeLisle]

On 11/28/2016 10:33 AM, Andre Vehreschild wrote:
> PING!
>
> I know it's a lengthy patch, but comments would be nice anyway.
>
> - Andre
>
> On Tue, 22 Nov 2016 20:46:50 +0100
> Andre Vehreschild <vehre@gmx.de> wrote:
>
>> Hi all,
>>
>> attached patch addresses the need of extending the API of the caf-libs to
>> enable allocatable components asynchronous allocation. Allocatable components
>> in derived type coarrays are different from regular coarrays or coarrayed
>> components. The latter have to be allocated on all images or on none.
>> Furthermore is the allocation a point of synchronisation.
>>
>> For allocatable components the F2008 allows to have some allocated on some
>> images and on others not. Furthermore is the registration with the caf-lib,
>> that an allocatable component is present in a derived type coarray no longer a
>> synchronisation point. To implement these features two new types of coarray
>> registration have been introduced. The first one just registering the
>> component with the caf-lib and the latter doing the allocate. Furthermore has
>> the caf-API been extended to provide a query function to learn about the
>> allocation status of a component on a remote image.
>>
>> Sorry, that the patch is rather lengthy. Most of this is due to the
>> structure_alloc_comps' signature change. The routine and its wrappers are used
>> rather often which needed the appropriate changes.
>>
>> I know I left two or three TODOs in the patch to remind me of things I have to
>> investigate further. For the current state these TODOs are no reason to hold
>> back the patch. The third party library opencoarrays implements the mpi-part
>> of the caf-model and will change in sync. It would of course be advantageous
>> to just have to say: With gcc-7 gfortran implements allocatable components in
>> derived coarrays nearly completely.
>>
>> I know we are in stage 3. But the patch bootstraps and regtests ok on
>> x86_64-linux/F23. So, is it ok for trunk or shall it go to 7.2?
>>
>> Regards,
>> 	Andre
>
>

Patch applies OK, regression tested OK here, test cases look reasonable. Have 
you been able to test with multiple images?

Jerry