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construct/matrix/vm_seq.cc
2023-02-05 18:45:08 -08:00

84 lines
1.5 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2023 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.
decltype(ircd::m::vm::sequence::dock)
ircd::m::vm::sequence::dock;
decltype(ircd::m::vm::sequence::retired)
ircd::m::vm::sequence::retired;
decltype(ircd::m::vm::sequence::committed)
ircd::m::vm::sequence::committed;
decltype(ircd::m::vm::sequence::uncommitted)
ircd::m::vm::sequence::uncommitted;
uint64_t
ircd::m::vm::sequence::min()
{
const auto *const e
{
eval::seqmin()
};
return e? get(*e) : 0;
}
uint64_t
ircd::m::vm::sequence::max()
{
const auto *const e
{
eval::seqmax()
};
return e? get(*e) : 0;
}
uint64_t
ircd::m::vm::sequence::get(id::event::buf &event_id)
{
static constexpr auto column_idx
{
json::indexof<event, "event_id"_>()
};
auto &column
{
dbs::event_column.at(column_idx)
};
const auto it
{
column.rbegin()
};
if(!it)
{
// If this iterator is invalid the events db should
// be completely fresh.
assert(db::sequence(*dbs::events) == 0);
return 0;
}
const auto &ret
{
byte_view<uint64_t>(it->first)
};
event_id = it->second;
return ret;
}
const uint64_t &
ircd::m::vm::sequence::get(const eval &eval)
{
return eval.sequence;
}