1 files changed, 101 insertions, 0 deletions
diff --git a/src/VBox/NetworkServices/Dhcpd/TimeStamp.h b/src/VBox/NetworkServices/Dhcpd/TimeStamp.h
new file mode 100644
index 00000000..9f95bc47
--- /dev/null
+++ b/src/VBox/NetworkServices/Dhcpd/TimeStamp.h
@@ -0,0 +1,101 @@
+/* $Id: TimeStamp.h $ */
+/** @file
+ * DHCP server - timestamps
+ */
+
+/*
+ * Copyright (C) 2017-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+#ifndef VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h
+#define VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/string.h>
+#include <iprt/time.h>
+
+
+/*
+ * Timestamp API uses unsigned time, but we need to be able to refer
+ * to events in the past.  Hide the ugly convertions.
+ */
+class TimeStamp
+{
+    int64_t m_ns;
+
+public:
+    TimeStamp()
+      : m_ns(0) {}
+
+    TimeStamp(uint64_t ns)
+      : m_ns(static_cast<int64_t>(ns)) {}
+
+    static TimeStamp now()
+    {
+        return TimeStamp(RTTimeNanoTS());
+    }
+
+    static TimeStamp absSeconds(int64_t sec)
+    {
+        RTTIMESPEC delta;
+        RTTimeNow(&delta);
+        RTTimeSpecSubSeconds(&delta, sec);
+
+        uint64_t stampNow = RTTimeNanoTS();
+        return TimeStamp(stampNow - RTTimeSpecGetNano(&delta));
+    }
+
+    TimeStamp &addSeconds(int64_t sec)
+    {
+        m_ns += sec * RT_NS_1SEC;
+        return *this;
+    }
+
+    TimeStamp &subSeconds(int64_t sec)
+    {
+        m_ns -= sec * RT_NS_1SEC;
+        return *this;
+    }
+
+
+    RTTIMESPEC *getAbsTimeSpec(RTTIMESPEC *pTime) const
+    {
+        RTTimeNow(pTime);
+
+        uint64_t stampNow = RTTimeNanoTS();
+        uint64_t delta = stampNow - m_ns;
+        RTTimeSpecSubNano(pTime, delta);
+        return pTime;
+    }
+
+    int64_t getAbsSeconds() const
+    {
+        RTTIMESPEC time;
+        return RTTimeSpecGetSeconds(getAbsTimeSpec(&time));
+    }
+
+    size_t absStrFormat(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput) const;
+
+    friend bool operator<(const TimeStamp &l, const TimeStamp &r);
+    friend bool operator>(const TimeStamp &l, const TimeStamp &r);
+    friend bool operator<=(const TimeStamp &l, const TimeStamp &r);
+    friend bool operator>=(const TimeStamp &l, const TimeStamp &r);
+};
+
+
+inline bool operator<(const TimeStamp &l, const TimeStamp &r) { return l.m_ns < r.m_ns; }
+inline bool operator>(const TimeStamp &l, const TimeStamp &r) { return l.m_ns > r.m_ns; }
+inline bool operator<=(const TimeStamp &l, const TimeStamp &r) { return l.m_ns <= r.m_ns; }
+inline bool operator>=(const TimeStamp &l, const TimeStamp &r) { return l.m_ns >= r.m_ns; }
+
+#endif /* !VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h */