[lworld] RFR: Unsafe primitives for values

[Roland Westrelin]

Hi Mandy,

> Your memory is correct and we went with the "Unsafe::withXXX" option 
> initially.  John talked to me a couple weeks ago that he suggests to go 
> with the "private buffer" option which is more robust than the "new 
> withXXX API points, 10 of them (primitive + ref + value)". With the 
> private buffer option, the existing Unsafe::putXXX APIs on the buffer 
> will have predictable effects. The JIT can easily eliminate the 
> allocation away the buffer.  John sketched the rough idea of this option 
> [1].  I did prototype the withXXX option to get a sense of the usage of 
> these new API points.  I do like this private buffer option better.

Thanks for the background info.

Roland.