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https://github.com/FairRootGroup/FairMQ.git
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0bb866ff36
- use same mapping for sender/receiver (created/remote) region. - rename FairMQRegion -> FairMQUnmanagedRegion.
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/********************************************************************************
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* Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
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* *
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* This software is distributed under the terms of the *
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* GNU Lesser General Public Licence version 3 (LGPL) version 3, *
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* copied verbatim in the file "LICENSE" *
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********************************************************************************/
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#ifndef FAIRMQUNMANAGEDREGIONSHM_H_
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#define FAIRMQUNMANAGEDREGIONSHM_H_
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#include "FairMQUnmanagedRegion.h"
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#include "FairMQLogger.h"
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#include <boost/interprocess/shared_memory_object.hpp>
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#include <boost/interprocess/mapped_region.hpp>
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#include <cstddef> // size_t
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#include <atomic>
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#include <memory>
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#include <string>
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#include <unordered_map>
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struct RemoteRegion // todo: better name?
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{
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RemoteRegion(std::string regionIdStr, uint64_t size)
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: fRegionName(regionIdStr)
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, fShmemObject(boost::interprocess::open_or_create, regionIdStr.c_str(), boost::interprocess::read_write)
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{
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if (size > 0)
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{
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fShmemObject.truncate(size);
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}
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fRegion = boost::interprocess::mapped_region(fShmemObject, boost::interprocess::read_write); // TODO: add HUGEPAGES flag here
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}
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RemoteRegion() = delete;
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RemoteRegion(const RemoteRegion& rr) = default;
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RemoteRegion(RemoteRegion&& rr) = default;
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~RemoteRegion()
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{
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if (boost::interprocess::shared_memory_object::remove(fRegionName.c_str()))
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{
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LOG(DEBUG) << "destroyed region " << fRegionName;
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}
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}
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std::string fRegionName;
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boost::interprocess::shared_memory_object fShmemObject;
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boost::interprocess::mapped_region fRegion;
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};
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class FairMQUnmanagedRegionSHM : public FairMQUnmanagedRegion
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{
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friend class FairMQSocketSHM;
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friend class FairMQMessageSHM;
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public:
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FairMQUnmanagedRegionSHM(const size_t size);
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virtual void* GetData() const override;
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virtual size_t GetSize() const override;
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static boost::interprocess::mapped_region* GetRemoteRegion(uint64_t regionId);
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virtual ~FairMQUnmanagedRegionSHM();
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private:
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static std::atomic<bool> fInterrupted;
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boost::interprocess::mapped_region* fRegion;
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uint64_t fRegionId;
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std::string fRegionIdStr;
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bool fRemote;
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static std::unordered_map<uint64_t, RemoteRegion> fRemoteRegionMap;
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};
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#endif /* FAIRMQUNMANAGEDREGIONSHM_H_ */ |