PTHREAD_MAIN_NP(3)     FreeBSD Library Functions Manual     PTHREAD_MAIN_NP(3)

NAME
     pthread_main_np - identify the initial thread

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread_np.h>

     int
     pthread_main_np(void);

DESCRIPTION
     The pthread_main_np() function is used in userland threads environment to
     identify the initial thread.  Its semantics is similar to the Solaris's
     thr_main() function.

RETURN VALUES
     The pthread_main_np() function returns 1 if the calling thread is the
     initial thread, 0 if the calling thread is not the initial thread, and -1
     if the thread's initialization has not yet completed.

SEE ALSO
     pthread_create(3), pthread_equal(3), pthread_np(3), pthread_self(3)

AUTHORS
     This manual page was written by Alexey Zelkin <phantom@FreeBSD.org>.

FreeBSD 13.1-RELEASE-p6        October 12, 2021        FreeBSD 13.1-RELEASE-p6