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80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/* 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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* $Id$
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*
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*****************************************************************************/
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/** @file
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* class BRMShmImpl
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*/
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#ifndef IDBSHMIMPL_H_
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#define IDBSHMIMPL_H_
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#include <unistd.h>
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//#define NDEBUG
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#include <cassert>
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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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namespace BRM
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{
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class BRMShmImpl
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{
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public:
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BRMShmImpl(unsigned key, off_t size, bool readOnly = false);
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~BRMShmImpl() { }
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inline unsigned key() const
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{
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return fKey;
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}
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inline off_t size() const
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{
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return fSize;
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}
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inline bool isReadOnly() const
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{
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return fReadOnly;
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}
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void setReadOnly();
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int grow(unsigned newKey, off_t newSize);
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int clear(unsigned newKey, off_t newSize);
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void swap(BRMShmImpl& rhs);
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void destroy();
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boost::interprocess::shared_memory_object fShmobj;
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boost::interprocess::mapped_region fMapreg;
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private:
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BRMShmImpl(const BRMShmImpl& rhs);
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BRMShmImpl& operator=(const BRMShmImpl& rhs);
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unsigned fKey;
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off_t fSize;
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bool fReadOnly;
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};
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} //namespace
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#endif
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