[fpc-pascal] Getting the state of a TRTLCriticalSection

[Mark Morgan Lloyd]

Jonas Maebe wrote:
> On 07 Oct 2013, at 09:14, Mark Morgan Lloyd wrote:
> 
>> Benito van der Zander wrote:
>>>>
>>>> In the end I stuck in code to increment/decrement a counter, and 
>>>> looked for it to be explicitly 0 or 1.
>>> Do you need to put a memory barrier around that, or does the critical 
>>> section take care of that?
>>
>> I used the interlocked increment/decrement, which- as I understand it- 
>> should handle membar itself on architectures that can benefit from it.
> 
> They do not include any memory barrier. The only thing those routines 
> guarantee on all platforms, is that the value is atomically 
> incremented/decremented.

Thanks Jonas, noted. For completeness, is there a way to force one?

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]