nbd_set_private_data - set the per-handle private data

       Eric Blake

       Richard W.M. Jones

       Copyright Red Hat

       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).

       This function does not fail.

       The following parameters must not be NULL: "h".  For more information see "Non-NULL parameters" in
       libnbd(3).

       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

libnbd-1.22.2                                      2025-06-16                            nbd_set_private_data(3)

       nbd_set_private_data - set the per-handle private data

       This call returns a "uintptr_t".

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

        #include <libnbd.h>

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

       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