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102 lines
3.9 KiB
C
102 lines
3.9 KiB
C
/*
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* FreeRTOS V202211.00
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://aws.amazon.com/freertos
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* https://www.FreeRTOS.org
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*/
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/*
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* Utility functions required to gather run time statistics. See:
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* https://www.FreeRTOS.org/rtos-run-time-stats.html
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*
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* Note that this is a simulated port, where simulated time is a lot slower than
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* real time, therefore the run time counter values have no real meaningful
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* units.
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*
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* Also note that it is assumed this demo is going to be used for short periods
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* of time only, and therefore timer overflows are not handled.
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*/
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/* FreeRTOS includes. */
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#include <FreeRTOS.h>
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/* Variables used in the creation of the run time stats time base. Run time
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* stats record how much time each task spends in the Running state. */
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static long long llInitialRunTimeCounterValue = 0LL, llTicksPerHundedthMillisecond = 0LL;
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/*-----------------------------------------------------------*/
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void vConfigureTimerForRunTimeStats( void )
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{
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LARGE_INTEGER liPerformanceCounterFrequency, liInitialRunTimeValue;
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/* Initialise the variables used to create the run time stats time base.
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* Run time stats record how much time each task spends in the Running
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* state. */
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if( QueryPerformanceFrequency( &liPerformanceCounterFrequency ) == 0 )
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{
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llTicksPerHundedthMillisecond = 1;
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}
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else
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{
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/* How many times does the performance counter increment in 1/100th
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* millisecond. */
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llTicksPerHundedthMillisecond = liPerformanceCounterFrequency.QuadPart / 100000LL;
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/* What is the performance counter value now, this will be subtracted
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* from readings taken at run time. */
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QueryPerformanceCounter( &liInitialRunTimeValue );
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llInitialRunTimeCounterValue = liInitialRunTimeValue.QuadPart;
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}
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}
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/*-----------------------------------------------------------*/
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unsigned long ulGetRunTimeCounterValue( void )
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{
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LARGE_INTEGER liCurrentCount;
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unsigned long ulReturn;
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/* What is the performance counter value now? */
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QueryPerformanceCounter( &liCurrentCount );
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/* Subtract the performance counter value reading taken when the
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* application started to get a count from that reference point, then
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* scale to (simulated) 1/100ths of a millisecond. */
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if( llTicksPerHundedthMillisecond == 0 )
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{
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/* The trace macros can call this function before the kernel has been
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* started, in which case llTicksPerHundedthMillisecond will not have been
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* initialised. */
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ulReturn = 0;
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}
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else
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{
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ulReturn = ( unsigned long )
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( ( liCurrentCount.QuadPart - llInitialRunTimeCounterValue ) /
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llTicksPerHundedthMillisecond );
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}
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return ulReturn;
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}
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/*-----------------------------------------------------------*/
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