71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
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/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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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* If you would like to incorporate Link into a proprietary software application,
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* please contact <link-devs@ableton.com>.
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*/
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#pragma once
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#include <chrono>
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#include <mach/mach_time.h>
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namespace ableton
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{
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namespace platforms
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{
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namespace darwin
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{
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struct Clock
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{
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using Ticks = std::uint64_t;
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using Micros = std::chrono::microseconds;
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Clock()
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{
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mach_timebase_info_data_t timeInfo;
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mach_timebase_info(&timeInfo);
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// numer / denom gives nanoseconds, we want microseconds
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mTicksToMicros = timeInfo.numer / (timeInfo.denom * 1000.);
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}
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Micros ticksToMicros(const Ticks ticks) const
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{
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return Micros{llround(mTicksToMicros * ticks)};
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}
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Ticks microsToTicks(const Micros micros) const
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{
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return static_cast<Ticks>(micros.count() / mTicksToMicros);
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}
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Ticks ticks() const
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{
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return mach_absolute_time();
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}
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std::chrono::microseconds micros() const
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{
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return ticksToMicros(ticks());
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}
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double mTicksToMicros;
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};
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} // namespace darwin
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} // namespace platforms
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} // namespace ableton
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