mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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72 lines
3.1 KiB
C++
72 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "svc_common.hpp"
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#include "svc_select_hardware_constants.hpp"
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namespace ams::svc {
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class Tick {
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public:
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static constexpr s64 TicksPerSecond = ::ams::svc::TicksPerSecond;
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static constexpr s64 GetTicksPerSecond() { return TicksPerSecond; }
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private:
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s64 tick;
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private:
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static constexpr s64 NanoSecondsPerSecond = INT64_C(1'000'000'000);
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static constexpr void DivNs(s64 &out, const s64 value) {
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out = value / NanoSecondsPerSecond;
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}
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static constexpr void DivModNs(s64 &out_div, s64 &out_mod, const s64 value) {
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out_div = value / NanoSecondsPerSecond;
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out_mod = value % NanoSecondsPerSecond;
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}
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static constexpr s64 ConvertTimeSpanToTickImpl(TimeSpan ts) {
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/* Split up timespan and ticks-per-second by ns. */
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s64 ts_div = 0, ts_mod = 0;
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s64 tick_div = 0, tick_mod = 0;
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DivModNs(ts_div, ts_mod, ts.GetNanoSeconds());
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DivModNs(tick_div, tick_mod, TicksPerSecond);
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/* Convert the timespan into a tick count. */
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s64 value = 0;
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DivNs(value, ts_mod * tick_mod + NanoSecondsPerSecond - 1);
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return (ts_div * tick_div) * NanoSecondsPerSecond + ts_div * tick_mod + ts_mod * tick_div + value;
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}
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public:
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constexpr explicit Tick(s64 t = 0) : tick(t) { /* ... */ }
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constexpr Tick(TimeSpan ts) : tick(ConvertTimeSpanToTickImpl(ts)) { /* ... */ }
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constexpr operator s64() const { return this->tick; }
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/* Tick arithmetic. */
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constexpr Tick &operator+=(Tick rhs) { this->tick += rhs.tick; return *this; }
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constexpr Tick &operator-=(Tick rhs) { this->tick -= rhs.tick; return *this; }
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constexpr Tick operator+(Tick rhs) const { Tick r(*this); return r += rhs; }
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constexpr Tick operator-(Tick rhs) const { Tick r(*this); return r -= rhs; }
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constexpr Tick &operator+=(TimeSpan rhs) { this->tick += Tick(rhs).tick; return *this; }
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constexpr Tick &operator-=(TimeSpan rhs) { this->tick -= Tick(rhs).tick; return *this; }
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constexpr Tick operator+(TimeSpan rhs) const { Tick r(*this); return r += rhs; }
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constexpr Tick operator-(TimeSpan rhs) const { Tick r(*this); return r -= rhs; }
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};
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}
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