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=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
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