First version of the shared memory transport.

Use via `--transport shmem` cmd option. No pub/sub.

fairmq/shmem/FairMQMessageSHM.h

@@ -0,0 +1,63 @@
+/********************************************************************************
+ *    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 FAIRMQMESSAGESHM_H_
+#define FAIRMQMESSAGESHM_H_
+
+#include <cstddef>
+#include <string>
+#include <atomic>
+
+#include <zmq.h>
+
+#include "FairMQMessage.h"
+#include "FairMQShmManager.h"
+
+class FairMQMessageSHM : public FairMQMessage
+{
+    friend class FairMQSocketSHM;
+
+  public:
+    FairMQMessageSHM();
+    FairMQMessageSHM(const size_t size);
+    FairMQMessageSHM(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr);
+    FairMQMessageSHM(const FairMQMessageSHM&) = delete;
+    FairMQMessageSHM operator=(const FairMQMessageSHM&) = delete;
+
+    void InitializeChunk(const size_t size);
+
+    virtual void Rebuild();
+    virtual void Rebuild(const size_t size);
+    virtual void Rebuild(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr);
+
+    virtual void* GetMessage();
+    virtual void* GetData();
+    virtual size_t GetSize();
+
+    virtual void SetMessage(void* data, const size_t size);
+
+    virtual void SetDeviceId(const std::string& deviceId);
+
+    virtual void Copy(const std::unique_ptr<FairMQMessage>& msg);
+
+    void CloseMessage();
+
+    virtual ~FairMQMessageSHM();
+
+    static void StringDeleter(void* data, void* str);
+
+  private:
+    zmq_msg_t fMessage;
+    FairMQ::shmem::ShPtrOwner* fOwner;
+    static uint64_t fMessageID;
+    static std::string fDeviceID;
+    bool fReceiving;
+    bool fQueued;
+    static std::atomic<bool> fInterrupted;
+};
+
+#endif /* FAIRMQMESSAGESHM_H_ */