1 files changed, 80 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/miscellaneous/InterlockedCompareExchangePointer/test1/test.cpp b/src/pal/tests/palsuite/miscellaneous/InterlockedCompareExchangePointer/test1/test.cpp
new file mode 100644
index 0000000000..c263a6cdc4
--- /dev/null
+++ b/src/pal/tests/palsuite/miscellaneous/InterlockedCompareExchangePointer/test1/test.cpp
@@ -0,0 +1,80 @@
+// 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.
+
+/*============================================================
+**
+** Source: test.c
+**
+** Purpose: Test for InterlockedCompareExchangePointer() function
+**
+**
+**=========================================================*/
+
+/* This test is FINISHED.  Note:  The biggest feature of this function is that
+   it locks the value before it increments it -- in order to make it so only
+   one thread can access it.  But, I really don't have a great test to 
+   make sure it's thread safe.  Any ideas?
+*/
+
+#include <palsuite.h>
+
+int __cdecl main(int argc, char *argv[]) 
+{
+
+    long StartValue = 5;
+    long NewValue   = 10;
+    PVOID ReturnValue = NULL;
+  
+    /*
+     * Initialize the PAL and return FAILURE if this fails
+     */
+
+    if(0 != (PAL_Initialize(argc, argv)))
+    {
+        return FAIL;
+    }
+
+    ReturnValue = InterlockedCompareExchangePointer((PVOID)&StartValue,
+                                                    (PVOID)NewValue,
+                                                    (PVOID)StartValue);
+
+    /* StartValue and NewValue should be equal now */
+    if(StartValue != NewValue) 
+    {
+        Fail("ERROR: These values should be equal after the exchange.  "
+             "They should both be %d, however the value that should have "
+             "been exchanged is %d.\n",NewValue,StartValue);    
+    }
+  
+    /* Returnvalue should have been set to what 'StartValue' was 
+       (5 in this case) 
+    */
+  
+    if((int)(size_t)ReturnValue != 5) 
+    {
+        Fail("ERROR: The return value should be the value of the "
+             "variable before the exchange took place, which was 5.  "
+             "But, the return value was %d.\n",ReturnValue);
+    }
+
+    /* This is a mismatch, so no exchange should happen */
+    InterlockedCompareExchangePointer((PVOID)&StartValue,
+                                       ReturnValue,
+                                       ReturnValue);
+    if(StartValue != NewValue) 
+    {
+        Fail("ERROR:  The compare should have failed and no exchange should "
+             "have been made, but it seems the exchange still happened.\n");
+    }
+  
+    
+    PAL_Terminate();
+    return PASS; 
+} 
+
+
+
+
+
+