set_thread_area man page on CentOS

set_thread_area man page on CentOS

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SET_THREAD_AREA(2)	   Linux Programmer's Manual	    SET_THREAD_AREA(2)

NAME
       set_thread_area - Set a Thread Local Storage (TLS) area

SYNOPSIS
       #include <linux/unistd.h>
       #include <asm/ldt.h>

       int set_thread_area (struct user_desc *u_info);

DESCRIPTION
       set_thread_area()  sets	an  entry in the current thread's Thread Local
       Storage (TLS) array.  The TLS array entry set by set_thread_area() cor‐
       responds to the value of u_info->entry_number passed in by the user. If
       this value is in bounds, set_thread_area() copies  the  TLS  descriptor
       pointed to by u_info into the thread's TLS array.

       When  set_thread_area() is passed an entry_number of -1, it uses a free
       TLS entry. If set_thread_area() finds a free TLS entry,	the  value  of
       u_info->entry_number  is	 set  upon  return  to	show  which  entry was
       changed.

RETURN VALUE
       set_thread_area() returns 0 on success, and -1 on failure,  with	 errno
       set appropriately.

ERRORS
       EINVAL u_info->entry_number is out of bounds.

       EFAULT u_info is an invalid pointer.

       ESRCH  A free TLS entry could not be located.

CONFORMING TO
       set_thread_area()  is Linux specific and should not be used in programs
       that are intended to be portable.

VERSIONS
       A version of set_thread_area() first appeared in Linux 2.5.29.

SEE ALSO
       get_thread_area(2).

Linux 2.5.29			  2003-02-21		    SET_THREAD_AREA(2)

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