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the begginning
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88
versioning/BRM/lbidresourcegraph.h
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88
versioning/BRM/lbidresourcegraph.h
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/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/******************************************************************************
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* $Id: lbidresourcegraph.h 1823 2013-01-21 14:13:09Z rdempsey $
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*
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*****************************************************************************/
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/** @file
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* class XXX interface
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*/
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#ifndef LBIDRESOURCEGRAPH_H_
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#define LBIDRESOURCEGRAPH_H_
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#include <map>
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#include <set>
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#ifndef _MSC_VER
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#include <tr1/unordered_set>
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#else
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#include <unordered_set>
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#endif
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#include <boost/thread.hpp>
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#include "brmtypes.h"
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#include "transactionnode.h"
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#include "resourcenode.h"
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#if defined(_MSC_VER) && defined(xxxLBIDRESOURCEGRAPH_DLLEXPORT)
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#define EXPORT __declspec(dllexport)
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#else
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#define EXPORT
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#endif
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namespace BRM
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{
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class LBIDResourceGraph
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{
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public:
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typedef std::tr1::unordered_set<ResourceNode *, RNHasher, RNEquals> RNodes_t;
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EXPORT LBIDResourceGraph();
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EXPORT ~LBIDResourceGraph();
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EXPORT int reserveRange(LBID_t start, LBID_t end, VER_t txn, boost::mutex &mutex);
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/// releases all resources held by txn
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EXPORT void releaseResources(VER_t txn);
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/// releases one resource
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EXPORT void releaseResource(LBID_t start);
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private:
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uint64_t color;
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LBIDResourceGraph(const LBIDResourceGraph &);
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LBIDResourceGraph & operator=(const LBIDResourceGraph &);
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void connectResources(LBID_t start, LBID_t end, TransactionNode *txnNode);
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bool checkDeadlock(TransactionNode &);
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bool DFSStep(RGNode *, uint64_t, uint64_t) const;
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std::map<VER_t, TransactionNode *> txns;
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RNodes_t resources;
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};
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}
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#undef EXPORT
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#endif
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