Function mbuf_mem_ref 

pub unsafe extern "C" fn mbuf_mem_ref(mem: *mut mbuf_mem) -> c_int

Increment the reference count of a memory chunk.

Note that a memory returned by mbuf_pool_get() already has a refcount of 1. This call is only needed if more than one object keep a reference on the memory at the same time.

@param mem: The memory to reference.

@return 0 on success, negative errno on error.