H5VLobject_optional

herr_t H5VLobject_optional(void *  obj,  const(H5VL_loc_params_t) *  loc_params,  hid_t connector_id,
       H5VL_optional_args_t args,  hid_t dxpl_id,  void * *  req)

Performs an optional operation on an object through the VOL.

Parameters

`obj`	Object
`loc_params`	Location parameters
`connector_id`	VOL connector identifier
`args`	Optional operation arguments
`dxpl_id`	Data transfer property list
`req`	Async request object (can be null)

Returns

Non-negative on success, negative on failure.