1 files changed, 95 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstTime-4.cpp b/src/VBox/Runtime/testcase/tstTime-4.cpp
new file mode 100644
index 00000000..6bbd4a23
--- /dev/null
+++ b/src/VBox/Runtime/testcase/tstTime-4.cpp
@@ -0,0 +1,95 @@
+/* $Id: tstTime-4.cpp $ */
+/** @file
+ * IPRT Testcase - Simple RTTime vs. RTTimeSystem test.
+ */
+
+/*
+ * Copyright (C) 2006-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/time.h>
+#include <iprt/stream.h>
+#include <iprt/initterm.h>
+#include <iprt/thread.h>
+#include <VBox/sup.h>
+
+
+
+int main()
+{
+    unsigned cErrors = 0;
+
+    RTR3InitExeNoArguments(RTR3INIT_FLAGS_SUPLIB);
+    RTPrintf("tstTime-4: TESTING...\n");
+
+    /*
+     * Check that RTTimeSystemNanoTS doesn't go backwards and
+     * isn't too far from RTTimeNanoTS().
+     */
+    RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield(); /* warmup */
+    const uint64_t SysStartTS = RTTimeSystemNanoTS();
+    const uint64_t GipStartTS = RTTimeNanoTS();
+    uint64_t SysPrevTS, GipPrevTS;
+    do
+    {
+        SysPrevTS = RTTimeSystemNanoTS();
+        GipPrevTS = RTTimeNanoTS();
+        if (SysPrevTS < SysStartTS)
+        {
+            cErrors++;
+            RTPrintf("tstTime-4: Bad Sys time!\n");
+        }
+        if (GipPrevTS < GipStartTS)
+        {
+            cErrors++;
+            RTPrintf("tstTime-4: Bad Gip time!\n");
+        }
+        uint64_t Delta = GipPrevTS > SysPrevTS ? GipPrevTS - SysPrevTS :
+                                                 SysPrevTS - GipPrevTS;
+        if (Delta > 100000000ULL /* 100 ms */ )
+        {
+            cErrors++;
+            RTPrintf("tstTime-4: Delta=%llu (GipPrevTS=%llu, SysPrevTS=%llu)!\n", Delta, GipPrevTS, SysPrevTS);
+        }
+
+    } while (SysPrevTS - SysStartTS < 2000000000 /* 2s */);
+
+
+    if (!cErrors)
+        RTPrintf("tstTime-4: SUCCESS\n");
+    else
+        RTPrintf("tstTime-4: FAILURE - %d errors\n", cErrors);
+    return !!cErrors;
+}
+