Is it safe to use C++ STL containers on multiple threads if no insertions and only .find()?

In C++, is it safe to use an std::map or std::vector concurrently in different threads if you are NOT inserting, just doing .find() operations on开发者_高级运维 it?

The current C++ Standard has nothing to say on the subject of threading, and so does not address this issue. The documentation for your specific C++ Standard Library implementation should cover it, however.

This is implementation specific and not guaranteed by the standard.

Yes. No memory changes or caching are going to happen under the hood.