Created
April 13, 2023 07:23
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Actor のサンプル
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import _Concurrency | |
// MARK: Class | |
print("------------------ CLASS ------------------------") | |
// class だと順番がぐちゃぐちゃになることがある 1 -> 8 まで順番に出力されない(データ競合) | |
class ClassCounter { | |
static var shared = ClassCounter() | |
private init() {} | |
var value = 0 | |
func increment() -> Int { | |
value += 1 | |
return value | |
} | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
Task.detached { | |
print( ClassCounter.shared.increment()) // data race | |
} | |
// MARK: Actor | |
print("------------------ ACTOR ------------------------") | |
// actor はデータ競合から守る 1 -> 8 まで順番に表示される | |
actor ActorCounter { | |
static var shared = ActorCounter() | |
private init() {} | |
var value = 0 | |
func increment() -> Int { | |
value += 1 | |
return value | |
} | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
Task.detached { | |
print(await ActorCounter.shared.increment()) | |
} | |
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