sighup.swift

import Dispatch
import Foundation

let syncQ = DispatchQueue(label: "sync")
var count = 0

let q = DispatchQueue(label: "test")

func test() {
	syncQ.sync {
		print("hello \(count)")
	}
	q.asyncAfter(deadline: .now() + 1.0, execute: test)
}
q.asyncAfter(deadline: .now() + 1.0, execute: test)

public func registerSighup() -> DispatchSourceSignal {
	signal(SIGHUP, SIG_IGN)
	let sigintSrc = DispatchSource.makeSignalSource(signal: SIGHUP, queue: syncQ)
	sigintSrc.setEventHandler {
		count += 1
	}
	sigintSrc.resume()
	return sigintSrc
}

let source = registerSighup()

dispatchMain()