Adding multiple transports support & other fixes:

- Avoid polling when only one input channel is used.
 - Send only handles for shared memory transport.
 - Avoid waiting in the rate logger thread when nothing to log.
 - Hide warnings from generated files
 - Fix #483

fairmq/FairMQTransports.h

@@ -0,0 +1,47 @@
+/********************************************************************************
+ *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+#ifndef FAIRMQTRANSPORTS_H_
+#define FAIRMQTRANSPORTS_H_
+
+#include <string>
+#include <unordered_map>
+
+namespace FairMQ
+{
+
+enum class Transport
+{
+    DEFAULT,
+    ZMQ,
+    NN,
+    SHM
+};
+
+static std::unordered_map<std::string, Transport> TransportTypes {
+    { "default", Transport::DEFAULT },
+    { "zeromq", Transport::ZMQ },
+    { "nanomsg", Transport::NN },
+    { "shmem", Transport::SHM }
+};
+
+}
+
+namespace std
+{
+
+template <>
+struct hash<FairMQ::Transport>
+{
+    size_t operator()(const FairMQ::Transport& v) const
+    {
+        return hash<int>()(static_cast<int>(v));
+    }
+};
+
+}
+#endif /* FAIRMQTRANSPORTS_H_ */