CFMachPort
Declaration
class CFMachPortOverview
A CFMachPort object is a wrapper for a native Mach port (mach_port_t). Mach ports are the native communication channel for the macOS kernel.
CFMachPort does not provide a function to send messages, so you primarily use a CFMachPort object if you need to listen to a Mach port that you obtained by other means. You can get a callback when a message arrives on the port or when the port becomes invalid, such as when the native port dies.
To listen for messages you need to create a run loop source with CFMachPortCreateRunLoopSource(_:_:_:) and add it to a run loop with CFRunLoopAddSource(_:_:_:).
To send data, you must use the Mach APIs with the native Mach port, which is not described here. Alternatively, you can use a CFMessagePort object, which can send arbitrary data.
Mach ports only support communication on the local machine. For network communication, you have to use a CFSocket object.
Topics
Creating a CFMachPort Object
Configuring a CFMachPort Object
CFMachPortInvalidate(_:)CFMachPortCreateRunLoopSource(_:_:_:)CFMachPortSetInvalidationCallBack(_:_:)
Examining a CFMachPort Object
CFMachPortGetContext(_:_:)CFMachPortGetInvalidationCallBack(_:)CFMachPortGetPort(_:)CFMachPortIsValid(_:)