What does the "cxa" prefix mean in "__cxa_demangle"?

Question

I have a piece of code, in which I see the __cxa_ prefix. For instance, the following excerpt contains it:

    std::unique_ptr<char, void (*)(void *)> own(
#ifndef _MSC_VER
            abi::__cxa_demangle(typeid(TR).name(), nullptr,
                                nullptr, nullptr),
#else
            nullptr,
#endif
            std::free
    );

I would be happy to have some explanations on the meaning of cxa.

Answer 1

It's just function name, but may be it's CXxAbi.