Find a page with free blocks of `page->block_size`.

Bytes available in a block

setting a tls slot is only used on macOS for now

Called when the process is done (through `at_exit`)

----------------------------------------------------------- Reserve a huge page arena. ----------------------------------------------------------- *

maintain stats for huge objects

must be thread safe as it is called from stats_merge

Malloc using mmap */

Realloc using mmap */

Allocate chunk and prepend remainder with chunk in successor base. */

Remove one object of the given size.

Remove one of the largest available objects.

Initialize thread, assign heap

Traverse each chunk and check it; return total */

Bin sizes follow floating point (exponent + mantissa) distribution (piecewise linear log approx) This ensures that for each size class, the average ov