Jerry wrote:
Hi All,
As far as I know, a variable with "register" storage class will probably
be optimized to be
having no RAM storage but only staying in a CPU register. A "volatile"
variable will only
be read by RAM access. But what about a variable declared as volatile
with register
storage class?
"register" is advisory, it is up to the compiler to ultimately
decide what to choose. "volatile" is mandatory, otherwise your
program will break or work funny. You probably should read Derek
Jones' The New C Standard (http://www.knosof.co.uk/cbook/cbook.html)
--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia
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