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

Sources/OpenVPN3/openvpn/common/waitbarrier.hpp

@@ -0,0 +1,58 @@
+//    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_COMMON_WAITBARRIER_H
+#define OPENVPN_COMMON_WAITBARRIER_H
+
+#include <openvpn/common/exception.hpp>
+#include <openvpn/common/pthreadcond.hpp>
+
+namespace openvpn {
+
+#ifdef HAVE_VALGRIND
+  static constexpr unsigned int WAIT_BARRIER_TIMEOUT = 300;
+#else
+  static constexpr unsigned int WAIT_BARRIER_TIMEOUT = 30;
+#endif
+
+  template <typename THREAD_COMMON>
+  inline void event_loop_wait_barrier(THREAD_COMMON& tc,
+				      const unsigned int seconds=WAIT_BARRIER_TIMEOUT)
+  {
+    // barrier prior to event-loop entry
+    switch (tc.event_loop_bar.wait(seconds))
+      {
+      case PThreadBarrier::SUCCESS:
+	break;
+      case PThreadBarrier::CHOSEN_ONE:
+	tc.user_group.activate();
+	tc.show_unused_options();
+	tc.event_loop_bar.signal();
+	break;
+      case PThreadBarrier::TIMEOUT:
+	throw Exception("event loop barrier timeout");
+      case PThreadBarrier::ERROR:
+	throw Exception("event loop barrier error");
+      }
+  }
+}
+
+#endif