[Info-vax] Volatile, was: Re: yet another sys$qiow question

[Stephen Hoffman]

On 2015-08-27 23:59:06 +0000, David Froble said:

> And I'm still asking, why would anyone do such?  Is there any valid reason?

Polling the IOSB is documented and supported and works.

As for why?  Maybe lack of time, knowledge, staff, money or interest?   
 Already in an AST?   Code ported from a single-user environment?   
Somebody profiled the code and found some benefit to the approach, as 
could well be the case for some computing in an SMP-based, threaded 
environment?   Or the ever-popular "if it works..." approach to IT?

You might as well try to explain why one of the denizens persists in 
using the nomenclature of a ~35-year-old 16-bit microprocessor design 
to represent the current 64-bit architecture.   It just... is.





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