Swift is awesome but lacks atomicity guarantees and it allows some race conditions even when using gcd. https://github.com/apple/swift/blob/master/docs/proposa

Swift is awesome but lacks atomicity guarantees and it allows some race conditions even when using gcd. https://github.com/apple/swift/blob/master/docs/proposals/Concurrency.rst https://github.com/apple/swift/blob/master/docs/proposals/Co...