On 2/23/24 13:03, Sebastian Wittmeier via Std-Proposals wrote:
> shared pointers perhaps help in the very simple find case.
>
> But say (still a simple example without multiple containers and without
> circular references) you want to display the first and last entry of a
> container, if its size is > 1; and the only entry, if its size is 1.
>
> Then you have to prevent any change on the container by other threads,
> between reading the size and reading the entries.
>
> Otherwise it could happen that you display the same entry twice.

Yeah so we need to add the definition of "locking scale"; either we lock
at the shared_ptr level, container level and/or semantic level.

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