Gck.Object.cache_lookup

### Method

# Gck Objectcache_lookup

#### Declaration [src]

    GckAttributes*
    gck_object_cache_lookup (
      GckObject* object,
      const gulong* attr_types,
      gint n_attr_types,
      GCancellable* cancellable,
      GError** error
    )

#### Description [src]

Lookup attributes in the cache, or retrieve them from the object if necessary.

If `object` is a `GckObjectCache` then this will lookup the attributes there first if available, otherwise will read them from the object and update the cache.

If `object` is not a `GckObjectCache`, then the attributes will simply be read from the object.

This may block, use the asynchronous version when this is not desirable.

#### Parameters

`attr_types`

  Type: An array of `gulong`

  The types of attributes to update.

  The length of the array is specified in the `n_attr_types` argument.
  The data is owned by the caller of the method.

`n_attr_types`

  Type: `gint`

  The number of attribute types.

`cancellable`

  Type: `GCancellable`

  Optional cancellation object.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will be left initialized to `NULL` by the method if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `GckAttributes`

The attributes retrieved or `NULL` on failure.

The caller of the method takes ownership of the returned data, and is responsible for freeing it.