(j3.2006) J3/15-244

Bill Long longb
Wed Oct 14 13:15:07 EDT 2015

See 15-244r1.


On Oct 14, 2015, at 11:49 AM, John Reid <John.Reid at stfc.ac.uk> wrote:

> Malcolm Cohen wrote:
>> <<<
>> This is not so. The first sentence of 8.2 of the TS says "An atomic
>> subroutine is an intrinsic subroutine that performs an action on its
>> ATOM argument or the count of its EVENT argument atomically."
>> And the rest of the description of what an atomic subroutine does simply
>> does not work with EVENT_QUERY ***AT ALL***.  The description of the atomics
>> has moved on since 2010.
>> Just read the Atomic subroutines section in the standard.  It is rather
>> obviously completely inapplicable to how EVENT_QUERY works.  Sprinkling "or
>> EVENT argument" and "or execution of EVENT POST statements" throughout that
>> subclause would make it work, but the end result would be significantly
>> harder to understand than just describing how EVENT_QUERY works (it has NO
>> interaction with the other atomic subroutines!!!) separately.
>>> I have to disagree here. Changing an atomic subroutine to be nonatomic
>>> is surely a big change.
>> Describing it correctly is not a change at all.
>>> It is like making ATOMIC_REF nonatomic.
>> No it is not.
>> There are some changes needed to 244 (at least I think it needs to say it
>> operates atomically w.r.t. EVENT POST), but blathering on about how we are
>> destroying the TS is not shedding any light on the matter.
> Yes, words saying that it operates atomically w.r.t. EVENT POST and 
> EVENT WAIT would meet my objection.
> Cheers,
> John.
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Bill Long                                                                       longb at cray.com
Fortran Technical Support  &                                  voice:  651-605-9024
Bioinformatics Software Development                     fax:  651-605-9142
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