H5Fget_mdc_size

herr_t H5Fget_mdc_size(hid_t file_id,  size_t *  max_size,  size_t *  min_clean_size,
       size_t *  cur_size,  int *  cur_num_entries)

Gets metadata cache size information.

`file_id`	File identifier
`max_size`	Pointer to receive max cache size
`min_clean_size`	Pointer to receive min clean size
`cur_size`	Pointer to receive current size
`cur_num_entries`	Pointer to receive number of entries

Non-negative on success, negative on failure.