mirror of
https://github.com/scylladb/scylladb.git
synced 2026-04-22 09:30:45 +00:00
e045dddae8
This change fixes the dependencies between the clock implementation headers. All the clocks share the common clock offset, but are otherwise independent (though the `db_clock` does depend on `gc_clock` for time point conversions).
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2015 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <limits>
|
|
#include <chrono>
|
|
#include "clocks-impl.hh"
|
|
|
|
namespace api {
|
|
|
|
using timestamp_type = int64_t;
|
|
timestamp_type constexpr missing_timestamp = std::numeric_limits<timestamp_type>::min();
|
|
timestamp_type constexpr min_timestamp = std::numeric_limits<timestamp_type>::min() + 1;
|
|
timestamp_type constexpr max_timestamp = std::numeric_limits<timestamp_type>::max();
|
|
|
|
// Used for generating server-side mutation timestamps.
|
|
// Same epoch as Java's System.currentTimeMillis() for compatibility.
|
|
// Satisfies requirements of TrivialClock.
|
|
class timestamp_clock {
|
|
using base = std::chrono::system_clock;
|
|
public:
|
|
using rep = timestamp_type;
|
|
using duration = std::chrono::microseconds;
|
|
using period = typename duration::period;
|
|
using time_point = std::chrono::time_point<timestamp_clock, duration>;
|
|
|
|
static constexpr bool is_steady = base::is_steady;
|
|
|
|
static time_point now() noexcept {
|
|
return time_point(std::chrono::duration_cast<duration>(base::now().time_since_epoch())) + get_clocks_offset();
|
|
}
|
|
};
|
|
|
|
static inline
|
|
timestamp_type new_timestamp() {
|
|
return timestamp_clock::now().time_since_epoch().count();
|
|
}
|
|
|
|
}
|