Update

Kha/Tools/windows_x64/std/haxe/atomic/AtomicObject.hx

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+package haxe.atomic;
+
+#if !(target.atomics || core_api)
+#error "This target does not support atomic operations."
+#end
+
+#if (js || hxcpp)
+#error "JavaScript and Hxcpp do not support AtomicObject"
+#end
+
+/**
+	Atomic object. Use with care, this does not magically make it thread-safe to mutate objects.
+	Not supported on JavaScript or C++.
+**/
+@:coreType
+abstract AtomicObject<T:{}> {
+	public function new(value:T):Void;
+
+	/**
+		Atomically compares the value of `a` with `expected` and replaces `a` with `replacement` if they are equal..
+		Returns the original value of `a`.
+
+		Note that comparison is done by reference, and not by value.
+		While this is expected for most objects, this might give unexpected behaviour for strings.
+	**/
+	public function compareExchange(expected:T, replacement:T):T;
+
+	/**
+		Atomically exchanges `a` with `value`.
+		Returns the original value of `a`.
+	**/
+	public function exchange(value:T):T;
+
+	/**
+		Atomically fetches the value of `a`.
+	**/
+	public function load():T;
+
+	/**
+		Atomically stores `value` into `a`.
+		Returns the value that has been stored.
+	**/
+	public function store(value:T):T;
+}