[fpc-devel] volatile variables

[Jonas Maebe]

On 28 Jun 2011, at 14:58, Andrew Brunner wrote:

> On Tue, Jun 28, 2011 at 6:14 AM, Michael Schnell  
> <mschnell at lumino.de> wrote:
>
>> For variables not defined as volatile, (e.g.) pthread_mutex (and  
>> similar
>> stuff on Windows) can be used to protect them.
>>
> A mutex may be able to atomically block access because of its own
> memory barrier, but I would suggest that employing such a technique on
> multi-core systems will not ensure an accurate value.

pthread_mutex() does guarantee that. I don't know about the Windows  
equivalents.


Jonas