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diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h
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+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <chrono>
+#include <memory>
+
+#include "common/common_types.h"
+
+namespace Common {
+
+class WallClock {
+public:
+ /// Returns current wall time in nanoseconds
+ virtual std::chrono::nanoseconds GetTimeNS() = 0;
+
+ /// Returns current wall time in microseconds
+ virtual std::chrono::microseconds GetTimeUS() = 0;
+
+ /// Returns current wall time in milliseconds
+ virtual std::chrono::milliseconds GetTimeMS() = 0;
+
+ /// Returns current wall time in emulated clock cycles
+ virtual u64 GetClockCycles() = 0;
+
+ /// Returns current wall time in emulated cpu cycles
+ virtual u64 GetCPUCycles() = 0;
+
+ /// Tells if the wall clock, uses the host CPU's hardware clock
+ bool IsNative() const {
+ return is_native;
+ }
+
+protected:
+ WallClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequency, bool is_native)
+ : emulated_cpu_frequency{emulated_cpu_frequency},
+ emulated_clock_frequency{emulated_clock_frequency}, is_native{is_native} {}
+
+ u64 emulated_cpu_frequency;
+ u64 emulated_clock_frequency;
+
+private:
+ bool is_native;
+};
+
+std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency,
+ u32 emulated_clock_frequency);
+
+} // namespace Common