A volatile question
David Keppel
pardo at cs.washington.edu
Mon Mar 19 11:56:54 AEST 1990
I have a question about the meaning of ``volatile''. Suppose:
foo (volatile int *zork) { ... }
bar()
{
int zork;
foo (&zork);
...
}
The behavior that I want is that `zork' can be cached (e.g., in a
register) in `bar', but that it must be treated as `volatile' in
`foo'. If the optimizer is allowed to to optimize away the
`volatileness' of zork inside `foo'? If it is, what is the correct
way to code this function?
;-D on ( A constant question about volatile ) Pardo
--
pardo at cs.washington.edu
{rutgers,cornell,ucsd,ubc-cs,tektronix}!uw-beaver!june!pardo
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