Function mi_register_deferred_free 

pub unsafe extern "C" fn mi_register_deferred_free(
    out: mi_deferred_free_fun,
    arg: *mut c_void,
)

Register a deferred free function.

• deferred_free Address of a deferred free-ing function or None to unregister.
• arg Argument that will be passed on to the deferred free function.

Some runtime systems use deferred free-ing, for example when using reference counting to limit the worst case free time.

Such systems can register (re-entrant) deferred free function to free more memory on demand.

• When the force parameter is true all possible memory should be freed.

• The per-thread heartbeat parameter is monotonically increasing and guaranteed to be deterministic if the program allocates deterministically.

• The deferred_free function is guaranteed to be called deterministically after some number of allocations (regardless of freeing or available free memory).

At most one deferred_free function can be active.

Note: This function is thread safe.