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

NAME
       get_thread_area - get a thread-local storage (TLS) area

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

       int get_thread_area(struct user_desc *u_info);

       Note: There is no glibc wrapper for this system call; see NOTES.

DESCRIPTION
       get_thread_area() returns an entry in the current thread's thread-local
       storage (TLS) array.  The index of the entry corresponds to  the	 value
       of  u_info->entry_number,  passed  in  by the user.  If the value is in
       bounds, get_thread_area() copies the corresponding TLS entry  into  the
       area pointed to by u_info.

RETURN VALUE
       get_thread_area()  returns  0 on success.  Otherwise, it returns -1 and
       sets errno appropriately.

ERRORS
       EFAULT u_info is an invalid pointer.

       EINVAL u_info->entry_number is out of bounds.

VERSIONS
       A version of get_thread_area() first appeared in Linux 2.5.32.

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

NOTES
       Glibc does not provide a wrapper for this system call, since it is gen‐
       erally intended for use only by threading libraries.  In	 the  unlikely
       event that you want to call it directly, use syscall(2).

SEE ALSO
       modify_ldt(2), set_thread_area(2)

COLOPHON
       This  page  is  part of release 3.53 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2012-07-13		    GET_THREAD_AREA(2)

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