mirror of
https://github.com/matrix-construct/construct
synced 2024-11-15 22:41:12 +01:00
d9a4f06bf6
This is not a move to c++17. If the compiler happens to have support for c++17 namespace scope resolution, they have been kind enough to backport it to gnu++14. This limits our support for really old c++14 compilers, but that was limited anyway. GCC 6.1 and clang 3.6 tested.
90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#pragma once
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#define HAVE_IRCD_UTIL_TIMER_H
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namespace ircd::util
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{
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struct timer;
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}
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struct ircd::util::timer
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{
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using clock = std::chrono::steady_clock;
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nanoseconds accumulator;
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clock::time_point start;
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template<class duration = std::chrono::seconds> duration get() const;
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void cont();
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void stop();
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timer(const std::function<void ()> &);
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timer();
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};
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inline
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ircd::util::timer::timer()
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:accumulator{0ns}
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,start{clock::now()}
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{
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}
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inline
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ircd::util::timer::timer(const std::function<void ()> &func)
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:timer{}
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{
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func();
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stop();
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}
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inline void
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ircd::util::timer::stop()
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{
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const auto now(clock::now());
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if(start == clock::time_point::min())
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return;
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accumulator += std::chrono::duration_cast<decltype(accumulator)>(now - start);
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start = clock::time_point::min();
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}
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inline void
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ircd::util::timer::cont()
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{
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if(start != clock::time_point::min())
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{
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const auto now(clock::now());
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accumulator += std::chrono::duration_cast<decltype(accumulator)>(now - start);
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}
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start = clock::now();
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}
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template<class duration>
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duration
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ircd::util::timer::get()
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const
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{
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return std::chrono::duration_cast<duration>(accumulator);
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}
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