[PATCH 4/7] lib: Add gem_userptr helpers

[Daniel Vetter]

On Sun, Aug 23, 2015 at 01:10:42PM +0100, Chris Wilson wrote:
> On Wed, Aug 12, 2015 at 08:29:17PM -0300, Tiago Vignatti wrote:
> > This patch moves userptr definitions and helpers implementation that were
> > locally in gem_userptr_benchmark and gem_userptr_blits to the library, so other
> > tests can make use of them as well. There's no functional changes.
> 
> We have a pattern in the helpers to use
> gem_userptr() as a no-fail (failures are detected and asserted upon
> inside the handler) and __gem_userptr() where the errno is passed back
> to the caller. Commonly when writing tests it is simpler to just get the
> handle back (and have the test fail appropriately otherwise) and doing
> negative parameter testing is rarer and so delegated to the
> __gem_ variant.

Also please add gtkdoc when adding new wrappers (and generally those doc
comments mention the distinction Chris raised).
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch