When can std :: thread :: join fail due to no_such_process

Question

std::thread::join()resolved to crash by throwing std::system_errorfor no_such_processif the thread is "invalid." Note that the case no_such_processis different from a thread that is not connecting (for which an error code invalid_argument).

In what circumstances can this happen? Alternatively, what should I do to ensure that it is join()not suitable for this reason? I want the destructor to join()handle some threads, and, of course, I want the destructor to never throw an exception. What can make (properly constructed and not destroyed) the stream `invalid '.

Answer 1

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* nix , , , , (). , , .

, , , join() ?

std::thread::joinable(), ¹. , . , , .

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Answer 2

no_such_process ESRCH POSIX. POSIX std::thread::join(), , pthread_join().

• 7 POSIX ESRCH.
• Linux pthread_join ESRCH, . ++ - , , , , this std::thread.

, , undefined, bad reinterpret_cast .