Mutex alternatives in swift

Question

I have a shared-memory between multiple threads. I want to prevent these threads access this piece of memory at a same time. (like producer-consumer problem)

Problem:

A thread add elements to a queue and another thread reads these elements and delete them. They shouldn't access the queue simultaneously.

One solution to this problem is to use Mutex.

As I found, there is no Mutex in Swift. Is there any alternatives in Swift?

Answer 1

There are many solutions for this but I use serial queues for this kind of action:

let serialQueue = DispatchQueue(label: "queuename") serialQueue.sync {      //call some code here, I pass here a closure from a method } 

Edit/Update: Also for semaphores:

let higherPriority = DispatchQueue.global(qos: .userInitiated) let lowerPriority = DispatchQueue.global(qos: .utility)  let semaphore = DispatchSemaphore(value: 1)  func letUsPrint(queue: DispatchQueue, symbol: String) {     queue.async {         debugPrint("\(symbol) -- waiting")         semaphore.wait()  // requesting the resource          for i in 0...10 {             print(symbol, i)         }          debugPrint("\(symbol) -- signal")         semaphore.signal() // releasing the resource     } }  letUsPrint(queue: lowerPriority, symbol: "Low Priority Queue Work") letUsPrint(queue: higherPriority, symbol: "High Priority Queue Work")  RunLoop.main.run()