URLSession_Synchronizationn.swift

import Foundation

enum BoError: Error {
    case CommonError
}

func fetchWorker() -> Result<Int, BoError> {
    var result: Result<Int, BoError>!
    let semaphore = DispatchSemaphore(value: 0)
    URLSession.shared.dataTask(with: URL(string: "https://actin.tech/worker")!) { data, response, error in
        
        guard let data = data else {
            result = .failure(.CommonError)
            return
        }
        let dataStr = String(data: data, encoding: .utf8)!
        let val = Int(dataStr) ?? 0
        result = .success(val)
        semaphore.signal()
    }.resume()
    _ = semaphore.wait(wallTimeout: .distantFuture)
    return result
}

func fetchLoginInfo() -> Result<String, BoError> {
    var result: Result<String, BoError>!
    let semaphore = DispatchSemaphore(value: 0)
    URLSession.shared.dataTask(with: URL(string: "https://actin.tech/fetchLoginInfo")!) { data, response, error in
        
        guard let data = data else {
            result = .failure(.CommonError)
            return
        }
        let dataStr = String(data: data, encoding: .utf8)!
        result = .success(dataStr)
        semaphore.signal()
    }.resume()
    _ = semaphore.wait(wallTimeout: .distantFuture)
    return result
}

func mainEntry() {
    print(1)
    let workerResult = fetchWorker()
    print(workerResult)
    print(2)
    let loginInfoResult = fetchLoginInfo()
    print(loginInfoResult)
    print(3)
}
   


mainEntry()

print("finished")