/* ========================================================================

   (C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
   
   This software is provided 'as-is', without any express or implied
   warranty. In no event will the authors be held liable for any damages
   arising from the use of this software.
   
   Please see https://computerenhance.com for more information
   
   ======================================================================== */

/* ========================================================================
   LISTING 73
   ======================================================================== */

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

typedef uint64_t u64;
typedef double f64;

#include "listing_0070_platform_metrics.cpp"

int main(int ArgCount, char **Args)
{
	u64 MillisecondsToWait = 1000;
	if(ArgCount == 2)
	{
		MillisecondsToWait = atol(Args[1]);
	}

	u64 OSFreq = GetOSTimerFreq();
	printf("    OS Freq: %llu (reported)\n", OSFreq);

	u64 CPUStart = ReadCPUTimer();
	u64 OSStart = ReadOSTimer();
	u64 OSEnd = 0;
	u64 OSElapsed = 0;
	u64 OSWaitTime = OSFreq * MillisecondsToWait / 1000;
	while(OSElapsed < OSWaitTime)
	{
		OSEnd = ReadOSTimer();
		OSElapsed = OSEnd - OSStart;
	}
	
	u64 CPUEnd = ReadCPUTimer();
	u64 CPUElapsed = CPUEnd - CPUStart;
	u64 CPUFreq = 0;
	if(OSElapsed)
	{
		CPUFreq = OSFreq * CPUElapsed / OSElapsed;
	}
	
	printf("   OS Timer: %llu -> %llu = %llu elapsed\n", OSStart, OSEnd, OSElapsed);
	printf(" OS Seconds: %.4f\n", (f64)OSElapsed/(f64)OSFreq);
	
	printf("  CPU Timer: %llu -> %llu = %llu elapsed\n", CPUStart, CPUEnd, CPUElapsed);
	printf("   CPU Freq: %llu (guessed)\n", CPUFreq);
	
    return 0;
}