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, and −1 on failure, with errno set appropriately.

ERRORS

VERSIONS

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

CONFORMING TO

set_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; call it using syscall(2).

SEE ALSO

get_thread_area(2)