53 lines
952 B
C++
53 lines
952 B
C++
#if (ARDUINO >= 100)
|
|
#include <Arduino.h>
|
|
#else
|
|
#include <WProgram.h>
|
|
#endif
|
|
|
|
extern unsigned int __heap_start;
|
|
extern void *__brkval;
|
|
|
|
/*
|
|
* The free list structure as maintained by the
|
|
* avr-libc memory allocation routines.
|
|
*/
|
|
struct __freelist
|
|
{
|
|
size_t sz;
|
|
struct __freelist *nx;
|
|
};
|
|
|
|
/* The head of the free list structure */
|
|
extern struct __freelist *__flp;
|
|
|
|
#include "MemoryFree.h"
|
|
|
|
/* Calculates the size of the free list */
|
|
int freeListSize()
|
|
{
|
|
struct __freelist *current;
|
|
int total = 0;
|
|
for (current = __flp; current; current = current->nx)
|
|
{
|
|
total += 2; /* Add two bytes for the memory block's header */
|
|
total += (int)current->sz;
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
int freeMemory()
|
|
{
|
|
int free_memory;
|
|
if ((int)__brkval == 0)
|
|
{
|
|
free_memory = ((int)&free_memory) - ((int)&__heap_start);
|
|
}
|
|
else
|
|
{
|
|
free_memory = ((int)&free_memory) - ((int)__brkval);
|
|
free_memory += freeListSize();
|
|
}
|
|
return free_memory;
|
|
}
|