beedb/include/storage/metadata_page.h

48 lines
2.3 KiB
C++

/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include "page.h"
#include <concurrency/timestamp.h>
namespace beedb::storage
{
class MetadataPage final : public Page
{
public:
MetadataPage() = default;
~MetadataPage() override = default;
[[nodiscard]] concurrency::timestamp::timestamp_t next_transaction_timestamp() const
{
return *reinterpret_cast<const concurrency::timestamp::timestamp_t *>(Page::data() + sizeof(Page::id_t));
}
void next_transaction_timestamp(concurrency::timestamp::timestamp_t timestamp)
{
*reinterpret_cast<concurrency::timestamp::timestamp_t *>(Page::data() + sizeof(Page::id_t)) = timestamp;
}
};
} // namespace beedb::storage