[ofiwg] fi_trywait and providers

[Dave Goodell (dgoodell)]

I have a slight preference for options #1 or #2, but I don't feel strongly about it.  Other opinions?

-Dave

> On Mar 9, 2016, at 6:24 PM, Hefty, Sean <sean.hefty at intel.com> wrote:
> 
> The 1.3 libfabric release will contain the fi_trywait call.  For providers, there are a couple of options available for handling this.
> 
> - The libfabric core can check that a provider supports the 1.3 API, and reject those that don't.  This is the easy button.
> 
> - The fi_trywait call can include a check against the provider's fabric ops to see if trywait was implemented.  This conditional check would be in all fi_trywait paths.
> 
> - The libfabric core can wrap the provider's fabric ops with its own copy of fabric ops.  This requires mapping the provider's fabric fid to a core fabric fid for the sake of compatibility.  This is only needed for providers asking for API < 1.3.  This is the hard button.
> 
> - Sean
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