1 #include <rtthread.h>
2 #include <stdlib.h>
3 
get_free_heap_size(void)4 size_t get_free_heap_size(void)
5 {
6     rt_uint32_t total, used, max;
7 
8     rt_memory_info(&total, &used, &max);
9 
10     return total - used;
11 }
12