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/*
* FreeRTOS Kernel V10.2.1
* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
/*
* 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 are probably calling this function before the
scheduler has been started. */
ulReturn = 0;
}
else
{
ulReturn = ( unsigned long ) ( ( liCurrentCount.QuadPart - llInitialRunTimeCounterValue ) / llTicksPerHundedthMillisecond );
}
return ulReturn;
}
/*-----------------------------------------------------------*/
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