[ros-dev] Re: [ros-svn] [hbirr] 14000: Use only one access to the spinlock in the assertion, because the value may change between two access' on smp machines.

[Thomas Weidenmueller]

Hartmut Birr wrote:

>Thomas Weidenmueller schrieb:
>  
>
>I must change this because my smp machine does crash in the early boot
>phase at this point. If someone releases the spinlock between the two
>comparisons the assertion gets a hit.
>
>- Hartmut
>
>  
>
Hm, but wouldn't you then rather have to assert the previous value that 
InterlockedExchange returned? This way the value would've been read 
atomically only once instead of twice as it is at the moment.

Best Regards,
Thomas