[fpc-pascal] Where is IsMultiThreaded set under Linux?

[Andrew Brunner]

I disagree.  I've never had problems with setting values inside
boolean arrays in multi-threaded environments.  The memory is already
allocated.  Setting the value does not cause memory re-allocation,
which would be the only source of problems.  But of course just
because I didn't experience problems in the past with this does not
mean I won't with a future. ;-)

On Fri, Oct 8, 2010 at 9:04 AM, Jonas Maebe <jonas.maebe at elis.ugent.be> wrote:
>
> On 08 Oct 2010, at 15:57, Andrew Brunner wrote:
>
>> A better way of achieving this is looking at the collection of threads
>> you have.  Set your own booleans for Finished or if they
>> freeonterminate you will need to create an
>> TCompletes=Array[0..threadcount] of boolean.  And as the threads free
>> set the variable of TCompletes to true.  Then you can poll the
>> Completes to see if they are all true.
>>
>> There are a million ways to accomplish safe thread usage without
>> waitfor...
>
> Yes, but the alternatives above are only safe if you only use atomic
> operations (which could be quite slow in case of an array of booleans due to
> the atomic reservation granularity), or if you add proper memory barriers
> everywhere.
>
>
> Jonas
> _______________________________________________
> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>