C++程序  |  27行  |  783 B

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef CLOCK_H
#define CLOCK_H

#include <chrono>

class Clock
{
    typedef std::chrono::nanoseconds                 duration;
    typedef duration::rep                            rep;
    typedef duration::period                         period;
    typedef std::chrono::time_point<Clock, duration> time_point;
    static const bool is_steady =                    false;

    static time_point now();
};

#endif  // CLOCK_H