Marc Mutz wrote:
> Ivan was talking about thread-safe classes. You need to lock a mutex to
> take the copy.
Returning a QMap instead of a std::shared_ptr<std::map> would be perfectly
thread-safe there. The atomic reference counting would ensure that any
thread that wants to write to the data that another thread still holds would
detach first.
The only way to be thread-unsafe with a QMap would be to explicitly bypass
the implicit sharing by using something like std::shared_ptr<QMap>, which of
course doesn't make sense.
Kevin Kofler
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