encode(_:)
Serializes the hierarchy handle into a Mach port reference and accompanying data.
Declaration
func encode(_ block: (mach_port_t, Data) -> Void)Parameters
- block:
A closure that receives a Mach port and serialized data as arguments.
Discussion
This method invokes the supplied closure with a mach_port_t and Data object that together represent the serialized layer hierarchy handle. The port serves as a reference to the layer hierarchy that you can share with another process. Use the port and data together to reconstruct the handle using init(port:data:).
handle.encode { port, data in
guard port != MACH_PORT_NULL else {
// The handle is already invalidated.
return
}
// Send the port and data to the rendering process.
sendToRenderingExtension(port: port, data: data)
// Dispose of the port after sending.
mach_port_deallocate(mach_task_self(), port)
}Each call to this method creates a new port reference and unique serialized data. Decode each port and data pair only once using init(port:data:).