1 files changed, 85 insertions, 0 deletions
diff --git a/tests/src/CoreMangLib/cti/system/threading/interlocked/interlockedexchange5.cs b/tests/src/CoreMangLib/cti/system/threading/interlocked/interlockedexchange5.cs
new file mode 100644
index 0000000000..16195c0452
--- /dev/null
+++ b/tests/src/CoreMangLib/cti/system/threading/interlocked/interlockedexchange5.cs
@@ -0,0 +1,85 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+using System;
+using System.Threading;
+
+// Tests that Exchange(Int64, Int64)
+// actually switches values
+public class InterlockedExchange5
+{
+    private const int c_NUM_LOOPS = 100;
+
+    public static int Main()
+    {
+        InterlockedExchange5 test = new InterlockedExchange5();
+
+        TestLibrary.TestFramework.BeginTestCase("InterlockedExchange5");
+
+        if (test.RunTests())
+        {
+            TestLibrary.TestFramework.EndTestCase();
+            TestLibrary.TestFramework.LogInformation("PASS");
+            return 100;
+        }
+        else
+        {
+            TestLibrary.TestFramework.EndTestCase();
+            TestLibrary.TestFramework.LogInformation("FAIL");
+            return 0;
+        }
+    }
+
+    public bool RunTests()
+    {
+        bool retVal = true;
+
+        TestLibrary.TestFramework.LogInformation("[Positive]");
+        retVal = PosTest1() && retVal;
+
+        return retVal;
+    }
+
+    public bool PosTest1()
+    {
+        bool   retVal = true;
+        Int64 location;
+        Int64 value;
+        Int64 prevLocation;
+        Int64 oldLocation;
+
+        TestLibrary.TestFramework.BeginScenario("PosTest1: Int64 Interlocked.Exchange(Int64&,Int64)");
+
+        try
+        {
+            for (int i=0; i<c_NUM_LOOPS; i++)
+            {
+                value       = TestLibrary.Generator.GetInt64(-55);
+                location    = TestLibrary.Generator.GetInt64(-55);
+                prevLocation   = location;
+     
+                oldLocation = Interlocked.Exchange(ref location, value);
+
+                if (!location.Equals(value))
+                {
+                    TestLibrary.TestFramework.LogError("001", "Interlocked.Exchange() did not do the exchange correctly: Expected(" + value + ") Actual(" + location + ")");
+                    retVal = false;
+                }
+
+                if (!oldLocation.Equals(prevLocation))
+                {
+                    TestLibrary.TestFramework.LogError("002", "Interlocked.Exchange() did not return the expected value: Expected(" + prevLocation + ") Actual(" + oldLocation + ")");
+                    retVal = false;
+                }
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("003", "Unexpected exception: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+}