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