Because either it wasn't available with GCC 9, _GLIBCXX_USE_CXX11_ABI=0
or the simple fact atomic operations still doesn't fix the defective
reset() call.

I can't remember exactly.


On 5/25/23 15:30, Jens Maurer wrote:
>
>
> On 25/05/2023 21.17, Phil Bouchard via Std-Proposals wrote:
>> 2nd round of clarifications:
>>
>> The exact problem was OpenCV which is not using thread-safe reference
>> count smart pointers has a race-condition. It turns out C++ doesn't even
>> offer thread-safe reference count pointers anyways.
>
> In which way does std::atomic<std::shared_ptr<T>>
> as specified in [util.smartptr.atomic.shared] not satisfy your requirements?
>
> Jens

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