# CMBufferQueueGetHead(_:) Retrieves the next buffer from a queue, but doesn’t remove it. ``` func CMBufferQueueGetHead(_ queue: CMBufferQueue) -> CMBuffer? ``` ## Parameters `queue` The CMBufferQueue from which to retrieve a buffer. ## Return Value The buffer. Will be `NULL` if the queue is empty. ## Discussion This follows Core Foundation “Get” semantics – it does not retain the returned buffer. Note that with non-FIFO queues it’s not guaranteed that the next dequeue will return this particular buffer (if an intervening Enqueue adds a buffer that will dequeue next). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)