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diff --git a/ingen/Clock.hpp b/ingen/Clock.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2016-2017 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_CLOCK_HPP
+#define INGEN_ENGINE_CLOCK_HPP
+
+#ifdef __MACH__
+#    include <mach/mach.h>
+#    include <mach/mach_time.h>
+#endif
+
+namespace Ingen {
+
+class Clock {
+public:
+#ifdef __MACH__
+
+	Clock() { mach_timebase_info(&_timebase); }
+
+	inline uint64_t now_microseconds() const {
+		const uint64_t now = mach_absolute_time();
+		return now * _timebase.numer / _timebase.denom / 1e3;
+	}
+
+private:
+	mach_timebase_info_data_t _timebase;
+
+#else
+
+	inline uint64_t now_microseconds() const {
+		struct timespec time;
+#    if defined(CLOCK_MONOTONIC_RAW)
+		clock_gettime(CLOCK_MONOTONIC_RAW, &time);
+#    else
+		clock_gettime(CLOCK_MONOTONIC, &time);
+#    endif
+		return (uint64_t)time.tv_sec * 1e6 + (uint64_t)time.tv_nsec / 1e3;
+	}
+
+#endif
+};
+
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_CLOCK_HPP