Boost的无序容器是否对读取线程安全？

Question

For example, for MSVC, read-only is thread-safe on containers .

Is boost similarly thread-safe for read-only?

Update: ie Can we expect `const' methods to guarantee no memory corruption for multi-threaded use.

Answer 1

Typically read operations are thread-safe. I would expect any class implementing a read-only operation (or more generally, a const function) to explicitly call out the fact that is is not thread safe.

That said, I don't see any thread safety guarantees anywhere.

Answer 2

The upcoming standard defines the thread safety of all standard containers, and I would be very surprised if the boost implementations didn't meet this guarantee. In particular, you should be able to read from any instance of the container from any thread, as long as no thread is modifying the container.