Swift 5.5 Concurrency

main.swift

//
//  Created by menangen on 04.09.2021.
//

import Foundation

print("Hello, World!")

let t = Task(priority: .background, operation: { return 2 } )
let handle = Task {
    return await t.value
}

func listPhotos(inGallery name: String) async -> [String] {
    await Task.sleep(500_000_000)  // 1/2 seconds
    return ["IMG001", "IMG99", "IMG0404"]
}

actor TemperatureLogger {
    let label: String
    var measurements: [Int]
    private(set) var max: Int

    init(label: String, measurement: Int) {
        self.label = label
        self.measurements = [measurement]
        self.max = measurement
        
        print("TemperatureLogger thread:", Thread.current)
    }
}

let logger = TemperatureLogger(label: "Outdoors", measurement: 25)

Task {
    Thread.sleep(forTimeInterval: 2)
    
    print("Task thread:", Thread.current)
    
    let result = await listPhotos(inGallery: "New")
    print("Res:", result)
    
    print(await logger.max)
}

sleep(4)
print("End")