From 7ca7a8a51090f560ad6a2756ced0dadb23398701 Mon Sep 17 00:00:00 2001
From: Roman Elizarov <elizarov@gmail.com>
Date: Mon, 11 Nov 2019 22:18:15 +0300
Subject: [PATCH] ~ LeakTest for manual cyclic unlinking

---
 .../native/test/LeakTest.kt                   | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 kotlinx-coroutines-core/native/test/LeakTest.kt

diff --git a/kotlinx-coroutines-core/native/test/LeakTest.kt b/kotlinx-coroutines-core/native/test/LeakTest.kt
new file mode 100644
index 0000000000..f6e5b412a2
--- /dev/null
+++ b/kotlinx-coroutines-core/native/test/LeakTest.kt
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.coroutines
+
+import kotlin.test.*
+import kotlin.native.concurrent.*
+
+/**
+ * Test manual memory management by unlinking cycle.
+ */
+class LeakTest {
+    @Test
+    fun testLeak() {
+        // create obj1 <-> obj2 cycle
+        val obj1 = Ref()
+        val obj2 = Ref()
+        obj1.ref.value = obj2
+        obj2.ref.value = obj1
+        // freeze it
+        obj1.freeze()
+        // break the cycle 
+        obj1.ref.value = nullRef
+        obj2.ref.value = nullRef
+    }
+}
+
+private class Ref {
+    val ref = FreezableAtomicReference<Ref?>(this)
+}
+
+@SharedImmutable
+private val nullRef = Ref()
\ No newline at end of file