test(samples): add new samples

Author: kotlin-samples-pusher-bot

src/test/resources/test-compile-data/jvm/kotlin-web-site/whatsnew2220/2554037238b0cdf6d9b9e3f4587729b9.1.kt

@@ -0,0 +1,29 @@
+import kotlin.concurrent.atomics.*
+import kotlin.random.Random
+
+@OptIn(ExperimentalAtomicApi::class)
+fun main() {
+    val counter = AtomicLong(Random.nextLong())
+    val minSetBitsThreshold = 20
+
+    // Sets a new value without using the result
+    counter.update { if (it < 0xDECAF) 0xCACA0 else 0xC0FFEE }
+
+    // Retrieves the current value, then updates it
+    val previousValue = counter.fetchAndUpdate { 0x1CEDL.shl(Long.SIZE_BITS - it.countLeadingZeroBits()) or it }
+
+    // Updates the value, then retrieves the result
+    val current = counter.updateAndFetch {
+        if (it.countOneBits() < minSetBitsThreshold) it.shl(20) or 0x15BADL else it
+    }
+
+    val hexFormat = HexFormat {
+        upperCase = true
+        number {
+            removeLeadingZeros = true
+        }
+    }
+    println("Previous value: ${previousValue.toHexString(hexFormat)}")
+    println("Current value: ${current.toHexString(hexFormat)}")
+    println("Expected status flag set: ${current and 0xBAD != 0xBADL}")
+}