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Multithreading in static object construction
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Juha Nieminen
Jan 24, 2019, 12:15:15 PM1/24/19
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Static objects, such as ones in namespaces (including nameless
namespaces) and static class members, are constructed before
main() is even called.
I just want to make sure: Is it ok to use std::thread and the
other multithreading standard utilities in the constructors of
these objects?
We can assume that no such object needs anything from another
object in another compilation unit.
--- news://freenews.netfront.net/ - complaints: ne...@netfront.net ---
namespaces) and static class members, are constructed before
main() is even called.
I just want to make sure: Is it ok to use std::thread and the
other multithreading standard utilities in the constructors of
these objects?
We can assume that no such object needs anything from another
object in another compilation unit.
--- news://freenews.netfront.net/ - complaints: ne...@netfront.net ---
Sam
Jan 24, 2019, 5:37:15 PM1/24/19
to
Juha Nieminen writes:
> I just want to make sure: Is it ok to use std::thread and the
> other multithreading standard utilities in the constructors of
> these objects?
>
> We can assume that no such object needs anything from another
> object in another compilation unit.
That's the only assumption that you must make. Otherwise, that's fine.
> I just want to make sure: Is it ok to use std::thread and the
> other multithreading standard utilities in the constructors of
> these objects?
>
> We can assume that no such object needs anything from another
> object in another compilation unit.
Chris M. Thomasson
Jan 24, 2019, 9:34:55 PM1/24/19
to
On 1/24/2019 9:15 AM, Juha Nieminen wrote:
> Static objects, such as ones in namespaces (including nameless
> namespaces) and static class members, are constructed before
> main() is even called.
>
> I just want to make sure: Is it ok to use std::thread and the
> other multithreading standard utilities in the constructors of
> these objects?
Just be careful. I have seen nightmares where people create a thread in
> Static objects, such as ones in namespaces (including nameless
> namespaces) and static class members, are constructed before
> main() is even called.
>
> I just want to make sure: Is it ok to use std::thread and the
> other multithreading standard utilities in the constructors of
> these objects?
the ctor, that calls a member of the object currently being constructed!
The damn thread calls the member _before_ the object is fully
constructed. This IS BADDDDD! I have had nightmares about fixing some
others code before.
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