pthread_threadid_np(3) mojave man page | unix.com

PTHREAD_THREADID_NP(3)					   BSD Library Functions Manual 				    PTHREAD_THREADID_NP(3)

NAME
     pthread_threadid_np -- get the calling thread's unique ID

SYNOPSIS
     #include <pthread.h>

     int
     pthread_threadid_np(pthread_t thread, uint64_t *thread_id);

DESCRIPTION
     The pthread_threadid_np() function stores the system-wide unique integral ID of thread in the location spedified by thread_id.  If thread is
     NULL, the ID of the current thread is provided.

RETURN VALUES
     If successful, the pthread_threadid_np() function will return zero.  Otherwise an error number will be returned to indicate the error.

ERRORS
     The pthread_threadid_np() function will fail if:

     [EINVAL]		NULL value for thread_id.

     [ESRCH]		Non-existent thread thread.

SEE ALSO
     pthread_self(3)

BSD
								  April 12, 2016							       BSD