Kas saaksite selgitada tingimuste võistluse kontseptsiooni mitme lõime keskkonnas ja kuidas see võib mõjutada programmi tööd?

Race condition occurs when multiple threads simultaneously access and modify shared data without proper synchronization. As a result, the final state of the data can be unpredictable and depend on the order of thread execution.

For example, if two threads increment a counter at the same time, without locks, the final value may be less than expected because read and write operations can overlap.

On iOS, race conditions can lead to crashes, incorrect UI display, or data corruption. To prevent this, synchronization mechanisms are used:

• GCD serial queues
• NSLock, @synchronized
• Atomic properties

Example with GCD:

let serialQueue = DispatchQueue(label: "com.example.serial")
var counter = 0

serialQueue.sync {
    counter += 1
}

This ensures that changes to counter happen sequentially.