1 files changed, 89 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/threading/SleepEx/test1/test1.cpp b/src/pal/tests/palsuite/threading/SleepEx/test1/test1.cpp
new file mode 100644
index 0000000000..7ccfe0ce87
--- /dev/null
+++ b/src/pal/tests/palsuite/threading/SleepEx/test1/test1.cpp
@@ -0,0 +1,89 @@
+// 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:  test1.c
+**
+** Purpose: Tests that SleepEx correctly sleeps for a given amount of time,
+**          regardless of the alertable flag.
+**
+**
+**===================================================================*/
+
+#include <palsuite.h>
+
+typedef struct
+{
+    DWORD SleepTime;
+    BOOL Alertable;
+} testCase;
+
+testCase testCases[] =
+{
+    {0, FALSE},
+    {50, FALSE},
+    {100, FALSE},
+    {500, FALSE},
+    {2000, FALSE},
+
+    {0, TRUE},
+    {50, TRUE},
+    {100, TRUE},
+    {500, TRUE},
+    {2000, TRUE},
+};
+
+/* Milliseconds of error which are acceptable Function execution time, etc. */
+DWORD AcceptableTimeError = 150;
+
+int __cdecl main( int argc, char **argv ) 
+{
+    UINT64 OldTimeStamp;
+    UINT64 NewTimeStamp;
+    DWORD MaxDelta;
+    DWORD TimeDelta;
+    DWORD i;
+
+    if (0 != (PAL_Initialize(argc, argv)))
+    {
+        return FAIL;
+    }
+
+    LARGE_INTEGER performanceFrequency;
+    if (!QueryPerformanceFrequency(&performanceFrequency))
+    {
+        return FAIL;
+    }
+
+    for (i = 0; i<sizeof(testCases) / sizeof(testCases[0]); i++)
+    {
+        OldTimeStamp = GetHighPrecisionTimeStamp(performanceFrequency);
+
+        SleepEx(testCases[i].SleepTime, testCases[i].Alertable);
+
+        NewTimeStamp = GetHighPrecisionTimeStamp(performanceFrequency);
+
+        TimeDelta = NewTimeStamp - OldTimeStamp;
+
+        /* For longer intervals use a 10 percent tolerance */
+        if ((testCases[i].SleepTime * 0.1) > AcceptableTimeError)
+        {
+            MaxDelta = testCases[i].SleepTime + (DWORD)(testCases[i].SleepTime * 0.1);
+        }
+        else
+        {
+            MaxDelta = testCases[i].SleepTime + AcceptableTimeError;
+        }
+
+        if (TimeDelta < testCases[i].SleepTime || TimeDelta > MaxDelta)
+        {
+            Fail("The sleep function slept for %d ms when it should have "
+             "slept for %d ms\n", TimeDelta, testCases[i].SleepTime);
+       }
+    }
+
+    PAL_Terminate();
+    return PASS;
+}