08.03.2015 18:06, Joaquin M Lopez Munoz пишет:

Matwey V. Kornilov writes:

...

Hi,

I have a multi_index container and would like to make concurrent READs. Is it thread-safe? I mean that there could be mutable members inside the object, so calling formally const functions leaded to concurrent writes.

Adding to Ernest's answer: if your formally const function changes the value of some mutable data member, then concurrent access is NOT safe. For instance:

struct X { int x; mutable std::size_t count;

int get_x()const { ++count; return x; } };

Concurrent execution of X::get_x is not safe. This has nothing to do with Boost.MultiIndex, by the way; if your problem is different please answer back.

Yes, It is clear to me. This is why I asked if there any mutable inside MultiIndex.