+ usage->bytes_total = mi.arena; /* non-mmapped space allocated from system */
+ usage->bytes_used = mi.uordblks; /* total allocated space */
+ usage->bytes_free = mi.fordblks; /* total free space */
+ usage->bytes_used_mmap = mi.hblkhd; /* space in mmapped regions */
+ usage->bytes_max = mi.usmblks; /* maximum total allocated space */
+ usage->bytes_free_reclaimed = mi.ordblks; /* number of free chunks */
+ usage->bytes_overhead = mi.keepcost; /* releasable (via malloc_trim) space */
+
+ /* Not supported */
+ usage->bytes_used_sbrk = 0;