A callback function that releases any private data or resources associated with the data provider.
- iOS 2.0+
- macOS 10.3+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
A generic pointer to private information shared among your callback functions. This is the same pointer you supplied to
When Core Graphics frees a data provider that has an associated release function, the release function is called.
For information on how to associate your callback function with a data provider, see
Creating Direct-Access Data Providers
Creates a direct-access data provider that uses a URL to supply data.