libgomp nvptx plugin: rework initialisation and support the proposed load/unload hooks (was: Merge current set of OpenACC changes from gomp-4_0-branch)

[Ilya Verbin]

Hi,

On Wed, Feb 25, 2015 at 10:36:08 +0100, Thomas Schwinge wrote:
> > Julian Brown <julian@codesourcery.com> wrote:
> > This is a version of the previously-posted patch to rework
> > initialisation and support the proposed load/unload hooks, merged to
> > gomp4 branch and tested alongside the two patches (from

Currently the 'struct gomp_memory_mapping' contains 'lock' and 'is_initialized'.
Do you still need them?  Or we can use gomp_device_descr::lock and
is_initialized instead?  If yes, then we can replace the gomp_memory_mapping
structure with a splay_tree, as it was before the OpenACC merge.

Thanks,
  -- Ilya