/*
    FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.

    FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT
    http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS tutorial books are available in pdf and paperback.        *
     *    Complete, revised, and edited pdf reference manuals are also       *
     *    available.                                                         *
     *                                                                       *
     *    Purchasing FreeRTOS documentation will not only help you, by       *
     *    ensuring you get running as quickly as possible and with an        *
     *    in-depth knowledge of how to use FreeRTOS, it will also help       *
     *    the FreeRTOS project to continue with its mission of providing     *
     *    professional grade, cross platform, de facto standard solutions    *
     *    for microcontrollers - completely free of charge!                  *
     *                                                                       *
     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
     *                                                                       *
     *    Thank you for using FreeRTOS, and thank you for your support!      *
     *                                                                       *
    ***************************************************************************


    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

    >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
    distribute a combined work that includes FreeRTOS without being obliged to
    provide the source code for proprietary components outside of the FreeRTOS
    kernel.

    FreeRTOS 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 General Public License for more
    details. You should have received a copy of the GNU General Public License
    and the FreeRTOS license exception along with FreeRTOS; if not it can be
    viewed here: http://www.freertos.org/a00114.html and also obtained by
    writing to Real Time Engineers Ltd., contact details for whom are available
    on the FreeRTOS WEB site.

    1 tab == 4 spaces!

    ***************************************************************************
     *                                                                       *
     *    Having a problem?  Start by reading the FAQ "My application does   *
     *    not run, what could be wrong?"                                     *
     *                                                                       *
     *    http://www.FreeRTOS.org/FAQHelp.html                               *
     *                                                                       *
    ***************************************************************************


    http://www.FreeRTOS.org - Documentation, books, training, latest versions, 
    license and Real Time Engineers Ltd. contact details.

    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
    including FreeRTOS+Trace - an indispensable productivity tool, and our new
    fully thread aware and reentrant UDP/IP stack.

    http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High 
    Integrity Systems, who sell the code with commercial support, 
    indemnification and middleware, under the OpenRTOS brand.
    
    http://www.SafeRTOS.com - High Integrity Systems also provide a safety 
    engineered and independently SIL3 certified version for use in safety and 
    mission critical applications that require provable dependability.
*/

/*
 * Utility functions required to gather run time statistics.  See:
 * http://www.freertos.org/rtos-run-time-stats.html
 *
 * Note that this is a simulated port, where simulated time is a lot slower than
 * real time, therefore the run time counter values have no real meaningful
 * units.
 *
 * Also note that it is assumed this demo is going to be used for short periods
 * of time only, and therefore timer overflows are not handled.
*/

/* FreeRTOS includes. */
#include <FreeRTOS.h>

/* Variables used in the creation of the run time stats time base.  Run time 
stats record how much time each task spends in the Running state. */
static long long llInitialRunTimeCounterValue = 0LL, llTicksPerHundedthMillisecond = 0LL;

/*-----------------------------------------------------------*/

void vConfigureTimerForRunTimeStats( void )
{
LARGE_INTEGER liPerformanceCounterFrequency, liInitialRunTimeValue;

	/* Initialise the variables used to create the run time stats time base.
	Run time stats record how much time each task spends in the Running 
	state. */

	if( QueryPerformanceFrequency( &liPerformanceCounterFrequency ) == 0 )
	{
		llTicksPerHundedthMillisecond = 1;
	}
	else
	{
		/* How many times does the performance counter increment in 1/100th
		millisecond. */
		llTicksPerHundedthMillisecond = liPerformanceCounterFrequency.QuadPart / 100000LL;

		/* What is the performance counter value now, this will be subtracted
		from readings taken at run time. */
		QueryPerformanceCounter( &liInitialRunTimeValue );
		llInitialRunTimeCounterValue = liInitialRunTimeValue.QuadPart;
	}
}
/*-----------------------------------------------------------*/

unsigned long ulGetRunTimeCounterValue( void )
{
LARGE_INTEGER liCurrentCount;
unsigned long ulReturn;

	/* What is the performance counter value now? */
	QueryPerformanceCounter( &liCurrentCount );

	/* Subtract the performance counter value reading taken when the 
	application started to get a count from that reference point, then
	scale to (simulated) 1/100ths of a millisecond. */
	if( llTicksPerHundedthMillisecond == 0 )
	{
		/* The trace macros can call this function before the kernel has been
		started, in which case llTicksPerHundedthMillisecond will not have been
		initialised. */
		ulReturn = 0;
	}
	else
	{
		ulReturn = ( unsigned long ) ( ( liCurrentCount.QuadPart - llInitialRunTimeCounterValue ) / llTicksPerHundedthMillisecond );
	}

	return ulReturn;
}
/*-----------------------------------------------------------*/