NAME

       nbd_set_private_data - set the per-handle private data

SYNOPSIS

        #include <libnbd.h>

        uintptr_t nbd_set_private_data (struct nbd_handle *h,
                                        uintptr_t private_data);

DESCRIPTION

       Handles contain a private data field for applications to use for any purpose.

       When calling libnbd from C, the type of this field is "uintptr_t" so it can be used to
       store an unsigned integer or a pointer.

       In non-C bindings it can be used to store an unsigned integer.

       This function sets the value of this field and returns the old value (or 0 if it was not
       previously set).

RETURN VALUE

       This call returns a "uintptr_t".

ERRORS

       This function does not fail.

VERSION

       This function first appeared in libnbd 1.8.

       If you need to test if this function is available at compile time check if the following
       macro is defined:

        #define LIBNBD_HAVE_NBD_SET_PRIVATE_DATA 1

SEE ALSO

       nbd_create(3), nbd_get_private_data(3), libnbd(3).

AUTHORS

       Eric Blake

       Richard W.M. Jones

COPYRIGHT

       Copyright (C) 2019-2021 Red Hat Inc.

LICENSE

       This library is free software; you can redistribute it and/or modify it under the terms of
       the GNU Lesser General Public License as published by the Free Software Foundation; either
       version 2 of the License, or (at your option) any later version.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this
       library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
       Floor, Boston, MA 02110-1301 USA