Shmem: simplify message/socket and refactor to use namespaces

fairmq/shmem/UnmanagedRegion.cxx

@@ -0,0 +1,52 @@
+/********************************************************************************
+ *    Copyright (C) 2014 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"                       *
+ ********************************************************************************/
+
+#include "Common.h"
+#include "UnmanagedRegion.h"
+
+using namespace std;
+
+namespace bipc = ::boost::interprocess;
+
+namespace fair
+{
+namespace mq
+{
+namespace shmem
+{
+
+UnmanagedRegion::UnmanagedRegion(Manager& manager, const size_t size, RegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */)
+    : fManager(manager)
+    , fRegion(nullptr)
+    , fRegionId(0)
+{
+    try {
+        RegionCounter* rc = fManager.ManagementSegment().find<RegionCounter>(bipc::unique_instance).first;
+        if (rc) {
+            LOG(debug) << "region counter found, with value of " << rc->fCount << ". incrementing.";
+            (rc->fCount)++;
+            LOG(debug) << "incremented region counter, now: " << rc->fCount;
+        } else {
+            LOG(debug) << "no region counter found, creating one and initializing with 1";
+            rc = fManager.ManagementSegment().construct<RegionCounter>(bipc::unique_instance)(1);
+            LOG(debug) << "initialized region counter with: " << rc->fCount;
+        }
+
+        fRegionId = rc->fCount;
+
+        fRegion = fManager.CreateRegion(size, fRegionId, callback, path, flags);
+    } catch (bipc::interprocess_exception& e) {
+        LOG(error) << "cannot create region. Already created/not cleaned up?";
+        LOG(error) << e.what();
+        throw;
+    }
+}
+
+}
+}
+}