set_thread_area(2) -- Linux man page
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 corresponds 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.
Otherwise, it returns one of the errors listed in the "Errors" section.
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 in August, 2002.
SEE ALSO
get_thread_area(2).
NOTES
set_thread_area was written by Ingo Molnar.
AUTHOR
Kent Yoder.
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