Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/time/epoch.hpp

@@ -0,0 +1,52 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef OPENVPN_TIME_EPOCH_H
+#define OPENVPN_TIME_EPOCH_H
+
+#include <time.h>
+#include <cstdint> // for std::uint64_t
+
+namespace openvpn {
+
+  typedef std::uint64_t nanotime_t;
+
+  inline std::uint64_t milliseconds_since_epoch()
+  {
+    struct timespec ts;
+    if (::clock_gettime(CLOCK_REALTIME, &ts))
+      return 0;
+    return std::uint64_t(ts.tv_sec)  * std::uint64_t(1000)
+         + std::uint64_t(ts.tv_nsec) / std::uint64_t(1000000);
+  }
+
+  inline nanotime_t nanoseconds_since_epoch()
+  {
+    struct timespec ts;
+    if (::clock_gettime(CLOCK_REALTIME, &ts))
+      return 0;
+    return std::uint64_t(ts.tv_sec)  * std::uint64_t(1000000000)
+         + std::uint64_t(ts.tv_nsec);
+  }
+
+}
+
+#endif