[WASM] Regex std implementation

libraries/stdlib/wasm/stubs/native/concurrent.kt

@@ -9,3 +9,23 @@ package kotlin.native.concurrent
 
 internal val Any?.isFrozen
     inline get() = false
+
+internal inline fun <T> T.freeze(): T = this
+
+internal class AtomicReference<T>(public var value: T) {
+    public fun compareAndSwap(expected: T, new: T): T {
+        if (value == expected) {
+            val old = value
+            value = new
+            return old
+        }
+        return value
+    }
+    public fun compareAndSet(expected: T, new: T): Boolean {
+        if (value == expected) {
+            value = new
+            return true
+        }
+        return false
+    }
+}