Seastar
High performance C++ framework for concurrent servers
manual_clock.hh
1/*
2 * This file is open source software, licensed to you under the terms
3 * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
4 * distributed with this work for additional information regarding copyright
5 * ownership. You may not use this file except in compliance with the License.
6 *
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing,
12 * software distributed under the License is distributed on an
13 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14 * KIND, either express or implied. See the License for the
15 * specific language governing permissions and limitations
16 * under the License.
17 */
18/*
19 * Copyright (C) 2016 ScyllaDB
20 */
21
22#pragma once
23
24#ifndef SEASTAR_MODULE
25#include <seastar/core/timer.hh>
26#include <seastar/util/modules.hh>
27
28#include <atomic>
29#include <chrono>
30#endif
31
32namespace seastar {
33
34SEASTAR_MODULE_EXPORT
36public:
37 using rep = int64_t;
38 using period = std::chrono::nanoseconds::period;
39 using duration = std::chrono::duration<rep, period>;
40 using time_point = std::chrono::time_point<manual_clock, duration>;
41private:
42 static std::atomic<rep> _now;
43 static void expire_timers() noexcept;
44public:
45 manual_clock() noexcept;
46 static time_point now() noexcept {
47 return time_point(duration(_now.load(std::memory_order_relaxed)));
48 }
49 static void advance(duration d) noexcept;
50};
51
52extern template class timer<manual_clock>;
53
54}
55
Definition: manual_clock.hh:35
Definition: timer.hh:83
Seastar API namespace.
Definition: abort_on_ebadf.hh:26