swift-design-patterns/Concurrency Design Patterns/ReadWriteLock/ReadWriteLock.playground/Contents.swift at main · eleev/swift-design-patterns · GitHub

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import Foundation

final public class ReadWriteLock {

    // MARK: - Properties

    private var rwLock: pthread_rwlock_t = {
        var rwLock = pthread_rwlock_t()
        pthread_rwlock_init(&rwLock, nil)
        return rwLock
    }()

    // MARK: - Deinit

    deinit {
        destroy()
    }

    // MARK: - Methods

    func readLock() {
        pthread_rwlock_rdlock(&rwLock)
    }

    func tryReadLock() {
        pthread_rwlock_tryrdlock(&rwLock)
    }

    func writeLock() {
        pthread_rwlock_wrlock(&rwLock)
    }

    func tryWriteLock() {
        pthread_rwlock_trywrlock(&rwLock)
    }

    // MARK: - Private methods
    private func destroy() {
        pthread_rwlock_destroy(&rwLock)
    }

    func unlock() {
        pthread_rwlock_unlock(&rwLock)
    }
}