This is pretty much what I had in mind:
https://github.com/philippeb8/std__ts/blob/master/ts.h

Very cost / beneficial.


On 5/26/23 13:54, Phil Bouchard via Std-Proposals wrote:
> Honestly I do think Torvalds is right when he says C++ is fixing the
> wrong problems but I don't care since I'll just add it to the stacks of
> solutions brought forward by C++ Superset.
>
> On 5/26/23 10:53, Gergely Nagy wrote:
>> You can have many different implementations of a thread-safe STL
>> depending on the requirements. It all imposes different pros and cons.
>> To arbitrarily choose one way of implementing thread safety would
>> cause it to be suboptimal in other cases, and someone could say, C++
>> should provide different configurations.
>>
>> Now imagine you develop a library that uses STL. How can you make sure
>> that it will work optimally with all those settings? You also have to
>> implement all possible settings? You cannot just choose, because your
>> library may not be compatible with other libraries with different
>> settings. What if you want to provide only a DLL/.so and header files,
>> but no source code?
>>
>> Global switches in STL are a great way to make C++ self-incompatible.
>>
>>
>>
>> Phil Bouchard via Std-Proposals <std-proposals_at_[hidden]
>> <mailto:std-proposals_at_[hidden]>> ezt írta (időpont: 2023. máj.
>> 25., Cs, 22:53):
>>
>>
>>
>> On 5/25/23 16:49, Jason McKesson via Std-Proposals wrote:
>> > On Thu, May 25, 2023 at 4:18 PM Phil Bouchard <boost_at_[hidden]
>> <mailto:boost_at_[hidden]>> wrote:
>> >>
>> >>
>> >>
>> >> On 5/25/23 16:12, Jason McKesson via Std-Proposals wrote:
>> >>>
>> >>> Um, no. That would break the performance of any number of
>> applications
>> >>> that don't need thread safety or have handled it properly
>> themselves.
>> >>
>> >> You just turn it on or off depending on the need, defaulting
>> to off
>> >> obviously.
>> >
>> > Again, no. In order to make operations on the same
>> `std::vector<int>`
>> > thread-safe, every such object would have to carry some kind of
>> > mutually-exclusive payload. Therefore, every such object would
>> have to
>> > carry a cost. Even if we somehow standardized the ability to
>> switch it
>> > on and off, that would break if I used a library that had a
>> different
>> > setting from the one I compile for myself. Our objects wouldn't
>> be the
>> > same objects.
>>
>> Ok I won't argue here but it's pretty easy to make derived
>> thread-safe
>> versions anyways. So I'll write my own versions then, thanks.
>>
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