=head1 NAME

nbd_get_private_data - get the per-handle private data

=head1 SYNOPSIS

 #include <libnbd.h>

 uintptr_t nbd_get_private_data (
             struct nbd_handle *h
           );

=head1 DESCRIPTION

Return the value of the private data field set previously
by a call to L<nbd_set_private_data(3)>
(or 0 if it was not previously set).

=head1 RETURN VALUE

This call returns a C<uintptr_t>.

=head1 ERRORS

This function does not fail.

The following parameters must not be NULL: C<h>.
For more information see L<libnbd(3)/Non-NULL parameters>.

=head1 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_GET_PRIVATE_DATA 1

=head1 SEE ALSO

L<nbd_create(3)>,
L<nbd_set_private_data(3)>,
L<libnbd(3)>.

=head1 AUTHORS

Eric Blake

Richard W.M. Jones

=head1 COPYRIGHT

Copyright Red Hat
