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

Sources/OpenVPN3/openvpn/common/sleep.hpp

@@ -0,0 +1,50 @@
+//    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/>.
+
+// Portable millisecond sleep
+
+#ifndef OPENVPN_COMMON_SLEEP_H
+#define OPENVPN_COMMON_SLEEP_H
+
+#include <openvpn/common/platform.hpp>
+
+#ifdef OPENVPN_PLATFORM_WIN
+#include <windows.h>
+#else
+#include <time.h>
+#endif
+
+namespace openvpn {
+  inline bool sleep_milliseconds(const unsigned int milliseconds)
+  {
+#ifdef OPENVPN_PLATFORM_WIN
+    ::Sleep(milliseconds);
+    return true;
+#else
+    struct timespec ts;
+    ts.tv_sec = milliseconds / 1000U;
+    ts.tv_nsec = (milliseconds % 1000U) * 1000000U;
+    return ::nanosleep(&ts, nullptr) == 0;
+#endif
+  }
+}
+
+#endif