Seastar
High performance C++ framework for concurrent servers
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thread_cputime_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) 2018 ScyllaDB
20 */
21
22#pragma once
23
24#ifndef SEASTAR_MODULE
25#include <chrono>
26#include <time.h>
27#include <cassert>
28#endif
29
30namespace seastar {
31
33public:
34 using rep = int64_t;
35 using period = std::chrono::nanoseconds::period;
36 using duration = std::chrono::duration<rep, period>;
37 using time_point = std::chrono::time_point<thread_cputime_clock, duration>;
38public:
39 static time_point now() {
40 using namespace std::chrono_literals;
41
42 struct timespec tp;
43 [[gnu::unused]] auto ret = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp);
44 assert(ret == 0);
45 return time_point(tp.tv_nsec * 1ns + tp.tv_sec * 1s);
46 }
47};
48
49}
50
Definition: thread_cputime_clock.hh:32
Seastar API namespace.
Definition: abort_on_ebadf.hh:26