VMS Help POSIX Threads, PTHREAD routines, pthread_attr_setdetachstate, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 attr

    Thread attributes object to be modified.

 detachstate

    New value for the detachstate attribute. Valid values are as
    follows:

    PTHREAD_CREATE_       This is the default value. Threads are
    JOINABLE              created in "undetached" state.
    PTHREAD_CREATE_       The created thread is detached immediately,
    DETACHED              before it begins running.