olbrichj

let task = Process()
task.launchPath = "/bin/sh" //executable you want to run
task.arguments = arguments //here is the information you want to pass

task.terminationHandler = {
  // do here something in case the process terminates
}

task.launch()

olbrichj

class CustomThread: Thread {
  override func main() {
    do_something
  }
}

let customThread = CustomThread()
customThread.start()

olbrichj

DispatchQueue.main.async {
    // execute async on main thread
}

olbrichj

let operationQueue: OperationQueue = OperationQueue()
operationQueue.addOperations([operation1], waitUntilFinished: false)

olbrichj

class CustomOperation: Operation {
    override func main() {
        guard isCancelled == false else {
            finish(true)
            return
        }
        
        // Do something
        
        finish(true)

olbrichj

operation2.addDependency(operation1) //execute operation1 before operation2

olbrichj

let lock = NSLock()
lock.lock()
//do something
lock.unlock()

olbrichj

var m = pthread_mutex_t()
pthread_mutex_lock(&m)
// do something
pthread_mutex_unlock(&m)

olbrichj

let s = DispatchSemaphore(value: 1)
_ = s.wait(timeout: DispatchTime.distantFuture)
// do something
s.signal()

olbrichj

let lock = self

objc_sync_enter(lock)
closure()
objc_sync_exit(lock)