Swift wrapper around pthread_rwlock.
See Read-Write Lock for details.
Usage:
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:
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.