FairMQ: Setup ofi objects

FI_MSG API
FI_EP_RDM, reliable datagram message (unconnected)

fairmq/ofi/Context.h

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+/********************************************************************************
+ *    Copyright (C) 2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#ifndef FAIR_MQ_OFI_CONTEXT_H
+#define FAIR_MQ_OFI_CONTEXT_H
+
+#include <memory>
+#include <rdma/fabric.h>
+#include <string>
+#include <stdexcept>
+
+namespace fair
+{
+namespace mq
+{
+namespace ofi
+{
+
+enum class ConnectionType : bool { Bind, Connect };
+
+/**
+ * @class Context Context.h <fairmq/ofi/Context.h>
+ * @brief Transport-wide context
+ *
+ * @todo TODO insert long description
+ */
+class Context
+{
+  public:
+    Context(int numberIoThreads = 1);
+    ~Context();
+
+    /// Deferred Ofi initialization
+    auto InitOfi(ConnectionType type, std::string address) -> void;
+    auto CreateOfiEndpoint() -> fid_ep*;
+    auto CreateOfiCompletionQueue() -> fid_cq*;
+    auto GetZmqVersion() const -> std::string;
+    auto GetOfiApiVersion() const -> std::string;
+    auto GetZmqContext() const -> void* { return fZmqContext; }
+
+  private:
+    void* fZmqContext;
+    fi_info* fOfiInfo;
+    fid_fabric* fOfiFabric;
+    fid_domain* fOfiDomain;
+
+    auto OpenOfiFabric() -> void;
+    auto OpenOfiDomain() -> void;
+}; /* class Context */
+
+struct ContextError : std::runtime_error { using std::runtime_error::runtime_error; };
+
+} /* namespace ofi */
+} /* namespace mq */
+} /* namespace fair */
+
+#endif /* FAIR_MQ_OFI_CONTEXT_H */