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construct/include/ircd/m/event/horizon.h
2019-08-30 21:31:40 -07:00

49 lines
1.6 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_M_EVENT_HORIZON_H
/// Interface to the set of unresolved events. This set contains event_id's
/// which the server does not have. For each event_id there is an event::idx
/// of an event which made a reference to the event_id. There may be multiple
/// entries for an event_id.
///
/// This information helps construct the dependency graph in event::refs out of
/// order; it is anti-reference which is removed after the event is processed.
/// Each event::idx for an event_id in the set is then able to be "reprocessed"
/// in some way; at a minimum the reprocessing removes this event_id|event::idx
/// entry (see: dbs/event_horizon related).
///
class ircd::m::event::horizon
{
event::id event_id;
public:
using closure_bool = std::function<bool (const event::id &, const event::idx &)>;
static bool for_every(const closure_bool &);
bool for_each(const closure_bool &) const;
bool has(const event::idx &) const;
size_t count() const;
horizon(const event::id &);
horizon() = default;
static bool has(const event::id &);
static size_t rebuild();
};
inline
ircd::m::event::horizon::horizon(const event::id &event_id)
:event_id{event_id}
{
assert(event_id);
}