Re: Using external subroutines in OpenMP?

"James Van Buskirk" <not_valid@[EMAIL PROTECTED]
> writes:

> "Charles Coldwell" <coldwell@[EMAIL PROTECTED]
> wrote in message 
> news:m263u39c98.fsf@[EMAIL PROTECTED]
>
>> If you think about it for a second, you'll realize that there's no
>> such thing as a nontrivial PURE subroutine.  A PURE function is one
>> where the return values depends only on the values of the actual
>> arguments passed, not on any prior execution.  Since a subroutine has
>> no return value, it cannot be PURE, otherwise it would simply be a
>> no-op that the compiler could optimize away.
>
> Permit me to shoot that duck:

Well, alright.  But quoting MR&C, a PURE procedure:

i) if a function, does not alter any dummy argument

hence all dummy arguments could be passed by VALUE with the same
result.  But you're right, there is no rule against a PURE subroutine.

Chip

-- 
Charles M. "Chip" Coldwell
"Turn on, log in, tune out"
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