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An upcoming patch needs to pass more than just sioc as the opaque pointer to an AioContext; but since our AioContext code in general (and its QIO Channel wrapper code) lacks a notify callback present with GSource, we do not have the trivial option of just g_malloc'ing a small struct to hold all that data coupled with a notify of g_free. Instead, the data pointer must outlive the registered handler; in fact, having the data pointer have the same lifetime as QIONetListener is adequate. But the cleanest way to stick such a helper struct in QIONetListener will be to rearrange internal struct members. And that in turn means that all existing code that currently directly accesses listener->nsioc and listener->sioc[] should instead go through accessor functions, to be immune to the upcoming struct layout changes. So this patch adds accessor methods qio_net_listener_nsioc() and qio_net_listener_sioc(), and puts them to use. While at it, notice that the pattern of grabbing an sioc from the listener only to turn around can call qio_channel_socket_get_local_address is common enough to also warrant the helper of qio_net_listener_get_local_address, and fix a copy-paste error in the corresponding documentation. Signed-off-by: Eric Blake <eblake@redhat.com> Message-ID: <20251113011625.878876-24-eblake@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>