forked from 0ad/0ad
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
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/**
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* =========================================================================
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* File : tsc.h
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* Project : 0 A.D.
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* Description : Timer implementation using RDTSC
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#ifndef INCLUDED_TSC
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#define INCLUDED_TSC
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#include "tick_source.h"
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class TickSourceTsc : public TickSource
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{
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public:
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TickSourceTsc();
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~TickSourceTsc();
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virtual const char* Name() const
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{
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return "TSC";
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}
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virtual bool IsSafe() const;
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virtual u64 Ticks() const;
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/**
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* WHRT uses this to ensure the counter (running at nominal frequency)
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* doesn't overflow more than once during CALIBRATION_INTERVAL_MS.
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**/
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virtual uint CounterBits() const;
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/**
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* initial measurement of the tick rate. not necessarily correct
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* (e.g. when using TSC: cpu_ClockFrequency isn't exact).
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**/
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virtual double NominalFrequency() const;
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private:
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};
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#endif // #ifndef INCLUDED_TSC
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