[Lazarus] thread safe

[Michael Schnell]

On 06/28/2011 03:30 PM, Andrew Brunner wrote:
>
> LOL  All the Interlocked / Compare and Swap statements are included in
> the system unit and are readily available and tested (at least on
> AMD).
I don't know an IDE called "AMD" ;-) .

I already did some research and found that on ARM there seem to be 
issues with those.

On X64 there are hardware instructions for these operations, so I 
believe they will work as expected (atomic but not memory ordering).

But if you need to do atomic operations that are moire complex than what 
a single x86 instruction provides, you still need to use MUTEX 
(CriticalSection). And same is bound to work on all systems (including 
SMP) according to the Posix specs.

-Michael