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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2016 ScyllaDB
*/
#pragma once
#include <seastar/core/timer.hh>
#include <atomic>
#include <chrono>
namespace seastar {
class manual_clock {
public:
using rep = int64_t;
using period = std::chrono::nanoseconds::period;
using duration = std::chrono::duration<rep, period>;
using time_point = std::chrono::time_point<manual_clock, duration>;
private:
static std::atomic<rep> _now;
static void expire_timers() noexcept;
public:
manual_clock() noexcept;
static time_point now() noexcept {
return time_point(duration(_now.load(std::memory_order_relaxed)));
}
static void advance(duration d) noexcept;
};
extern template class timer<manual_clock>;
}
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