#ifndef COMMANDSTATION_DCC_FREEMEMORY_H_
#define COMMANDSTATION_DCC_FREEMEMORY_H_

// thanks go to  https://github.com/mpflaga/Arduino-MemoryFree
#ifdef __arm__
// should use uinstd.h to define sbrk but Due causes a conflict
extern "C" char* sbrk(int incr);
#else
extern char *__brkval;
#endif  // __arm__

int freeMemory() {
  char top;
#ifdef __arm__
  return &top - reinterpret_cast<char*>(sbrk(0));
#else
  return __brkval ? &top - __brkval : &top - __malloc_heap_start;
#endif  // __arm__
}
#endif  // COMMANDSTATION_DCC_FREEMEMORY_H_