PTHREAD_MULTI_NP(3)    FreeBSD Library Functions Manual    PTHREAD_MULTI_NP(3)

NAME
     pthread_multi_np, pthread_single_np - switch between multi- and single-
     threaded scheduling modes

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread_np.h>

     int
     pthread_multi_np(void);

     int
     pthread_single_np(void);

DESCRIPTION
     The pthread_single_np() function switches the process to a single-
     threaded mode, i.e., suspends all threads except the current.  The
     semantics of this function is similar to pthread_suspend_all_np(3).

     The pthread_multi_np() function switches the process to a multi-threaded
     mode.  The semantics of this function is similar to
     pthread_resume_all_np(3).

RETURN VALUES
     The pthread_multi_np() and pthread_single_np functions always return 0.

SEE ALSO
     pthread_np(3), pthread_resume_all_np(3), pthread_suspend_all_np(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