97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_M_DBS_EVENT_REFS_H
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namespace ircd::m::dbs
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{
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constexpr size_t EVENT_REFS_KEY_MAX_SIZE
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{
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sizeof(event::idx) + sizeof(event::idx)
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};
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constexpr size_t ref_shift
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{
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8 * (sizeof(event::idx) - sizeof(ref))
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};
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constexpr event::idx ref_mask
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{
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0xFFUL << ref_shift
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};
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string_view
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event_refs_key(const mutable_buffer &out,
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const event::idx &tgt,
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const ref &type,
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const event::idx &referer);
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std::tuple<ref, event::idx>
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event_refs_key(const string_view &amalgam);
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string_view
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reflect(const ref &);
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size_t _prefetch_event_refs(const event &, const opts &);
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void _index_event_refs(db::txn &, const event &, const opts &);
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// event_idx | ref_type, event_idx
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extern db::domain event_refs;
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}
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namespace ircd::m::dbs::desc
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{
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extern conf::item<std::string> event_refs__comp;
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extern conf::item<size_t> event_refs__block__size;
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extern conf::item<size_t> event_refs__meta_block__size;
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extern conf::item<size_t> event_refs__cache__size;
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extern conf::item<size_t> event_refs__cache_comp__size;
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extern const db::prefix_transform event_refs__pfx;
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extern const db::comparator event_refs__cmp;
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extern const db::descriptor event_refs;
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}
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/// Types of references indexed by event_refs. This is a single byte integer,
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/// which should be plenty of namespace. Internally event_refs_key() and
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/// event_refs store this in a high order byte of an event::idx integer. This
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/// is an alternative to having separate columns for each type of reference.
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///
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/// NOTE: These values are written to the database and cannot be changed to
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/// maintain ABI stability.
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///
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/// NOTE: These values not bit-flags and the entire integer space is in use.
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///
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enum class ircd::m::dbs::ref
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:uint8_t
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{
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/// All events which reference this event in their `prev_events`.
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NEXT = 0x00,
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/// All power events which reference this event in their `auth_events`.
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/// Non-auth/non-power events are not involved in this graph at all.
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NEXT_AUTH = 0x01,
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/// The next states in the transitions for a (type,state_key) cell.
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NEXT_STATE = 0x02,
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/// The previous states in the transitions for a (type,state_key) cell.
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PREV_STATE = 0x04,
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/// All m.receipt's which target this event.
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M_RECEIPT__M_READ = 0x10,
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/// All m.relates_to's which target this event.
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M_RELATES = 0x20,
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/// All m.room.redaction's which target this event.
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M_ROOM_REDACTION = 0x40,
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};
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