https://github.com/grype/rwlock-swift

Read-Write lock in Swift
https://github.com/grype/rwlock-swift

concurrency lock pthreads readwritelock swift

Last synced: 3 months ago
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Read-Write lock in Swift

• Host: GitHub
• URL: https://github.com/grype/rwlock-swift
• Owner: grype
• License: mit
• Created: 2021-04-11T05:38:48.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2021-04-11T06:27:33.000Z (about 4 years ago)
• Last Synced: 2024-04-24T11:24:57.144Z (about 1 year ago)
• Topics: concurrency, lock, pthreads, readwritelock, swift
• Language: Swift
• Homepage:
• Size: 4.88 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# RWLock

Swift wrapper around pthread_rwlock.

See [Read-Write Lock](https://en.wikipedia.org/wiki/Readers–writer_lock) for details.

Usage:

```swift

let lock = RWLock()

lock.readProtected {

    // do something concurrently with other reads and until write lock is acquired 

}

lock.writeProtected {

    // do something that requires exclusive access

}

```

Using propety wrapper:

```swift

class Foo {

    @RWLocked var items = [Any]()

    

    func add(_ item: Any) {

        items.append(item)

    }

    

    func removeAll() {

        items.removeAll()

    }

    

    func iterate() {

        items.forEach { 

            // do something with each item

        }

    }

    

}

```

Any modifications to `items` array will require write protection - this applies to methods `add(_:)` and `removeAll()`. In contrast, `iterate()`ing over the array requires read access. This means that you won't be able to `add(_:)` or `removeAll()` until iteration is complete, and you won't be able to `iterate()` until `add(_:)` or `removeAll()` had finished.