observability

[Richard Tobin]

In article <28946 at news.Think.COM> barmar at think.COM (Barry Margolin) writes:
>Here's a simple example where I think "volatile" is meaningful:
 [Handler example deleted]

Another case is local variables in routines that call setjmp().
Non-volatile auto variables whose value has been changed since the
call to setjmp() may have arbitrary values after a longjmp().
Volatile variables will have their correct values.

-- Richard
-- 
Richard Tobin,                       JANET: R.Tobin at uk.ac.ed             
AI Applications Institute,           ARPA:  R.Tobin%uk.ac.ed at nsfnet-relay.ac.uk
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