Swift 5 GCD

main.swift

//
//  main.swift
//  dispatcher
//
//  Created by menangen on 24.09.2021.
//

import Foundation
import Dispatch

print("Hello, Dispatch!")

let timerQ = DispatchQueue(label: "timer")
let udpQ =   DispatchQueue(label: "udp")

let source = DispatchSource.makeUserDataAddSource(queue: udpQ)

source.setEventHandler(handler: {
    print("EventHandler", Thread.current)
})

source.activate()

timerQ.asyncAfter(wallDeadline: .now() + 1) {
    print("async after", Thread.current)
    source.add(data: 1)
}

sleep(2)
print("End")