> If I get up this coming Monday morning and open up Outlook to check my work email, and see that my boss has emailed me saying "We need to add a new function to the SDK that returns a locked mutex by value", I know I'll be able to provide what he wants, and I know I'll be able to provide it for any platform (MS-Windows, Linux, Arduino, Texas Instruments).

Do you know why std::mutex isn’t copiable or movable?