text: /*
   * FreeRTOS Kernel V10.3.0
   * Copyright (C) 2020 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!
   */
  
  
  
  /*
   * The simplest possible implementation of pvPortMalloc().  Note that this
   * implementation does NOT allow allocated memory to be freed again.
   *
   * See heap_2.c and heap_3.c for alternative implementations, and the memory
   * management pages of http://www.FreeRTOS.org for more information.
   */
  #include <stdlib.h>
  #include "FreeRTOS.h"
  #include "task.h"
  
  
  /* Allocate the memory for the heap.  The struct is used to force byte
  alignment without using any non-portable code. */
  extern struct xRTOS_HEAP
  {
  	unsigned long ulDummy;
  	unsigned char ucHeap[ configTOTAL_HEAP_SIZE ];
  } xHeap;
  
  static size_t xNextFreeByte = ( size_t ) 0;
  /*-----------------------------------------------------------*/
  
  void *pvPortMalloc( size_t xWantedSize )
  {
  void *pvReturn = NULL; 
  
  	/* Ensure that blocks are always aligned to the required number of bytes. */
  	#if portBYTE_ALIGNMENT != 1
  		if( xWantedSize & portBYTE_ALIGNMENT_MASK )
  		{
  			/* Byte alignment required. */
  			xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
  		}
  	#endif
  
  	vTaskSuspendAll();
  	{
  		/* Check there is enough room left for the allocation. */
  		if( ( ( xNextFreeByte + xWantedSize ) < configTOTAL_HEAP_SIZE ) &&
  			( ( xNextFreeByte + xWantedSize ) > xNextFreeByte )	)/* Check for overflow. */
  		{
  			/* Return the next free byte then increment the index past this
  			block. */
  			pvReturn = &( xHeap.ucHeap[ xNextFreeByte ] );
  			xNextFreeByte += xWantedSize;			
  		}	
  	}
  	xTaskResumeAll();
  
  	return pvReturn;
  }
  /*-----------------------------------------------------------*/
  
  void vPortFree( void *pv )
  {
  	/* Memory cannot be freed using this scheme.  See heap_2.c and heap_3.c 
  	for alternative implementations, and the memory management pages of 
  	http://www.FreeRTOS.org for more information. */
  	( void ) pv;
  }
  /*-----------------------------------------------------------*/
  
  void vPortInitialiseBlocks( void )
  {
  	/* Only required when static memory is not cleared. */
  	xNextFreeByte = ( size_t ) 0;
  }
  
  
  