code: def nl_cache_mngt_register(ops):
      
      global cache_ops
  
      if not ops.co_name or not ops.co_obj_ops:
          return -NLE_INVAL
  
      with cache_ops_lock:
          if _nl_cache_ops_lookup(ops.co_name):
              return -NLE_EXIST
          ops.co_refcnt = 0
          ops.co_next = cache_ops
          cache_ops = ops
  
      _LOGGER.debug('Registered cache operations {0}'.format(ops.co_name))
      return 0
docs: Register a set of cache operations.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/lib/cache_mngt.c#L252
  
      Called by users of caches to announce the availability of a certain cache type.
  
      Positional arguments:
      ops -- cache operations (nl_cache_ops class instance).
  
      Returns:
      0 on success or a negative error code.