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construct/include/ircd/util/timer.h
2019-04-27 15:51:36 -07:00

61 lines
1.4 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_UTIL_TIMER_H
namespace ircd::util
{
struct timer;
}
struct ircd::util::timer
{
IRCD_OVERLOAD(nostart)
using clock = std::chrono::steady_clock;
nanoseconds accumulator {0ns};
clock::time_point start {clock::now()};
bool stopped() const;
template<class duration = std::chrono::seconds> duration get() const;
template<class duration = std::chrono::seconds> duration at() const;
string_view pretty(const mutable_buffer &out, const int &fmt = 0) const;
std::string pretty(const int &fmt = 0) const;
void cont();
void stop();
timer(const std::function<void ()> &);
timer(nostart_t);
timer() = default;
};
inline
ircd::util::timer::timer(nostart_t)
:start{clock::time_point::min()}
{
}
template<class duration>
duration
ircd::util::timer::at()
const
{
const auto now(clock::now());
return duration_cast<duration>(now - start);
}
template<class duration>
duration
ircd::util::timer::get()
const
{
return std::chrono::duration_cast<duration>(accumulator);
}