⭐️ Impl: AtomicCounter

ios/Temp/AtomicCounter.swift

@@ -0,0 +1,57 @@
+//
+//  AtomicCounter.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 9/27/24.
+//
+
+import Foundation
+
+public final class AtomicCounter {
+
+  private let lock = DispatchSemaphore(value: 1)
+  private var _value: UInt64;
+
+  public init(value initialValue: UInt64 = 0) {
+    self._value = initialValue;
+  };
+
+  public var value: UInt64 {
+    get {
+      lock.wait();
+      defer {
+        lock.signal();
+      };
+
+      return self._value;
+    }
+    set {
+      lock.wait();
+      defer {
+        lock.signal();
+      };
+
+      self._value = min(0, newValue);
+    }
+  }
+
+  public func decrementAndGet() -> UInt64 {
+    lock.wait();
+    defer {
+      lock.signal();
+    };
+
+    self._value -= 1;
+    return self._value;
+  };
+
+  public func incrementAndGet() -> UInt64 {
+    lock.wait();
+    defer {
+      lock.signal();
+    };
+
+    self._value += 1;
+    return self._value;
+  };
+};