mirror of
https://github.com/matrix-construct/construct
synced 2024-12-29 08:54:02 +01:00
d9a4f06bf6
This is not a move to c++17. If the compiler happens to have support for c++17 namespace scope resolution, they have been kind enough to backport it to gnu++14. This limits our support for really old c++14 compilers, but that was limited anyway. GCC 6.1 and clang 3.6 tested.
54 lines
2.1 KiB
C++
54 lines
2.1 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)
|
|
};
|
|
|
|
// 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);
|
|
|
|
using merge_delta = std::pair<string_view, string_view>;
|
|
using merge_closure = std::function<std::string (const string_view &key, const merge_delta &)>;
|
|
using update_closure = std::function<std::string (const string_view &key, merge_delta &)>;
|
|
|
|
struct comparator;
|
|
}
|
|
|
|
struct ircd::db::comparator
|
|
{
|
|
std::string name;
|
|
std::function<bool (const string_view &, const string_view &)> less;
|
|
std::function<bool (const string_view &, const string_view &)> equal;
|
|
};
|