# withUnsafeCurrentTask(body:) Calls a closure with an unsafe reference to the current task. ``` func withUnsafeCurrentTask(body: (UnsafeCurrentTask?) throws -> T) rethrows -> T ``` ## Parameters `body` A closure that takes an `UnsafeCurrentTask` parameter. If `body` has a return value, that value is also used as the return value for the `withUnsafeCurrentTask(body:)` function. ## Return Value The return value, if any, of the `body` closure. ## Discussion If you call this function from the body of an asynchronous function, the unsafe task handle passed to the closure is always non-`nil` because an asynchronous function always runs in the context of a task. However, if you call this function from the body of a synchronous function, and that function isn’t executing in the context of any task, the unsafe task handle is `nil`. Storing an unsafe reference to a task doesn’t affect the task’s actual life cycle, and the behavior of accessing an unsafe task reference outside of the `withUnsafeCurrentTask(body:)` method’s closure is unsafe and undefined behavior. There’s no safe way to retrieve a reference to the current task and save it for long-term use. To query the current task without saving a reference to it, use properties like `currentPriority`. If you need to store a reference to a task, create an unstructured task using `Task.detached(priority:operation:)` instead. --- 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)