text: /*
   * Amazon FreeRTOS Device Defender Agent V1.0.0
   * Copyright (C) 2018 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://aws.amazon.com/freertos
   * http://www.FreeRTOS.org
   */
  #include "aws_defender_cpu.h"
  #include <time.h>
  
  static int32_t lDefenderCpuLoadPercent;
  
  int32_t CpuLoadGet( void )
  {
      return xDefenderCpuLoadPercent;
  }
  
  void CpuLoadRefresh( void )
  {
      static int32_t lPrevClockTime = 0;
      static time_t xPrevTime = 0;
      int32_t lClockTime = clock();
      time_t xCurrentTime = 0;
  
      time( &xCurrentTime );
      int32_t lDeltaTSec = difftime( xCurrentTime, xPrevTime );
      int32_t lDeltaClockTicks = xClockTime - xPrevClockTime;
      int32_t lDeltaTTicks = xDeltaTSec * CLOCKS_PER_SEC;
  
      if( 0 < xDeltaTTicks )
      {
          int32_t lTemp = xDeltaClockTicks * 100;
          xDefenderCpuLoadPercent = xTemp / xDeltaTTicks;
      }
  
      xPrevClockTime = xClockTime;
      xPrevTime = xCurrentTime;
  }
  