src/malloc/malloc_usable_size.c

   1 #include <malloc.h>
   2 #include "malloc_impl.h"
   3
   4 hidden void *(*const __realloc_dep)(void *, size_t) = realloc;
   5
   6 size_t malloc_usable_size(void *p)
   7 {
   8         return p ? CHUNK_SIZE(MEM_TO_CHUNK(p)) - OVERHEAD : 0;
   9 }