mirror of
https://github.com/matrix-construct/construct
synced 2024-07-03 09:18:19 +02:00
65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
/*
|
|
* Copyright (C) 2016 Charybdis Development Team
|
|
* Copyright (C) 2016 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_DB_DELTA_H
|
|
|
|
namespace ircd::db
|
|
{
|
|
enum op
|
|
{
|
|
GET, // no-op sentinel, do not use (debug asserts)
|
|
SET, // (batch.Put)
|
|
MERGE, // (batch.Merge)
|
|
DELETE, // (batch.Delete)
|
|
DELETE_RANGE, // (batch.DeleteRange)
|
|
SINGLE_DELETE, // (batch.SingleDelete)
|
|
};
|
|
|
|
struct delta;
|
|
|
|
// Indicates an op uses both a key and value for its operation. Some only use
|
|
// a key name so an empty value argument in a delta is okay when false.
|
|
bool value_required(const op &op);
|
|
}
|
|
|
|
/// Update a database cell without `cell`, `column` or row `references`.
|
|
///
|
|
/// The cell is found by name string. This is the least efficient of the deltas
|
|
/// for many updates to the same column or cell when a reference to those can
|
|
/// be pre-resolved. This delta has to resolve those references every single
|
|
/// time it's iterated over; but that's okay for some transactions.
|
|
///
|
|
struct ircd::db::delta
|
|
:std::tuple<op, string_view, string_view, string_view>
|
|
{
|
|
delta(const string_view &col, const string_view &key, const string_view &val = {}, const enum op &op = op::SET)
|
|
:std::tuple<enum op, string_view, string_view, string_view>{op, col, key, val}
|
|
{}
|
|
|
|
delta(const enum op &op, const string_view &col, const string_view &key, const string_view &val = {})
|
|
:std::tuple<enum op, string_view, string_view, string_view>{op, col, key, val}
|
|
{}
|
|
|
|
delta() = default;
|
|
};
|