# Mach.Port ``` struct Port where RightType : MachPortRight ``` ## Topics ### Initializers [`init()`](/documentation/System/Mach/Port/init()) Allocate a new Mach port with a receive right, creating a Mach.Port to manage it. [`init(name: mach_port_name_t)`](/documentation/System/Mach/Port/init(name:)) Transfer ownership of an existing unmanaged Mach port right into a `Mach.Port` by name. [`init(name: mach_port_name_t, context: mach_port_context_t)`](/documentation/System/Mach/Port/init(name:context:)-14mp9) Transfer ownership of an existing, unmanaged, but already guarded, Mach port right into a Mach.Port by name. [`init(name: mach_port_name_t, context: mach_port_context_t)`](/documentation/System/Mach/Port/init(name:context:)-oyjl) Transfer ownership of an existing, unmanaged, but already guarded, Mach port right into a Mach.Port by name. ### Instance Properties [`var makeSendCount: mach_port_mscount_t`](/documentation/System/Mach/Port/makeSendCount) Access the make-send count. ### Instance Methods [`func copySendRight() throws -> Mach.Port`](/documentation/System/Mach/Port/copySendRight()) Create another send right from a given send right. [`func makeSendOnceRight() -> Mach.Port`](/documentation/System/Mach/Port/makeSendOnceRight()) Create a send-once right for a given receive right. [`func makeSendRight() -> Mach.Port`](/documentation/System/Mach/Port/makeSendRight()) Create a send right for a given receive right. [`func relinquish() -> mach_port_name_t`](/documentation/System/Mach/Port/relinquish()-241tg) Transfer ownership of the underlying port right to the caller. [`func relinquish() -> (name: mach_port_name_t, context: mach_port_context_t)`](/documentation/System/Mach/Port/relinquish()-70vbe) Transfer ownership of the underlying port right to the caller. [`func relinquish() -> mach_port_name_t`](/documentation/System/Mach/Port/relinquish()-74amu) Transfer ownership of the underlying port right to the caller. [`func relinquish() -> (name: mach_port_name_t, context: mach_port_context_t)`](/documentation/System/Mach/Port/relinquish()-9lm56) Transfer ownership of the underlying port right to the caller. [`func unguardAndRelinquish() -> mach_port_name_t`](/documentation/System/Mach/Port/unguardAndRelinquish()) Remove guard and transfer ownership of the underlying port right to the caller. [`func withBorrowedName(body: (mach_port_name_t, mach_port_context_t) -> ReturnType) -> ReturnType`](/documentation/System/Mach/Port/withBorrowedName(body:)-4d4iq) Borrow access to the port name in a block that can perform non-consuming operations. [`func withBorrowedName(body: (mach_port_name_t, mach_port_context_t) -> ReturnType) -> ReturnType`](/documentation/System/Mach/Port/withBorrowedName(body:)-8402i) Borrow access to the port name in a block that can perform non-consuming operations. [`func withBorrowedName(body: (mach_port_name_t) -> ReturnType) -> ReturnType`](/documentation/System/Mach/Port/withBorrowedName(body:)-9v68k) Borrow access to the port name in a block that can perform non-consuming operations. --- 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)