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70 lines
2.5 KiB
70 lines
2.5 KiB
15 years ago
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#ifndef LPC_MANAGER_H1103129409_INCLUDE_GUARD_
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#define LPC_MANAGER_H1103129409_INCLUDE_GUARD_
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/* This file is part of indexlib.
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* Copyright (C) 2005 Luís Pedro Coelho <luis@luispedro.org>
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*
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* Indexlib is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation and available as file
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* GPL_V2 which is distributed along with indexlib.
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*
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* Indexlib is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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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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* In addition, as a special exception, the copyright holders give
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* permission to link the code of this program with any edition of
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* the Qt library by Trolltech AS, Norway (or with modified versions
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* of Qt that use the same license as Qt), and distribute linked
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* combinations including the two. You must obey the GNU General
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* Public License in all respects for all of the code used other than
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* Qt. If you modify this file, you may extend this exception to
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* your version of the file, but you are not obligated to do so. If
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* you do not wish to do so, delete this exception statement from
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* your version.
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*/
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/**
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* This gets memory and accesses it.
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*
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*/
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class memory_manager {
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public:
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virtual ~memory_manager() { }
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/**
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* Return a reference to the memory at position \idx.
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* An important interface bug is that it is not specified how far from \idx you
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* can safely access.
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*/
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virtual const unsigned char* ronly_base( unsigned idx ) const = 0;
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/**
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* Like \ref ronly_base except you can write on the block
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*/
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virtual unsigned char* rw_base( unsigned ) const = 0;
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/** Returns the size of the block */
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virtual unsigned size() const = 0;
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/** Resizes the block.
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* This invalidates all previously returned pointers
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*/
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virtual void resize( unsigned ) = 0;
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};
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template <memory_manager* ( *get_parent )()>
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struct thing_manager {
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public:
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const unsigned char* ronly_base( unsigned idx ) const { return get_parent()->ronly_base( idx ); }
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unsigned char* rw_base( unsigned idx ) const { return get_parent()->rw_base( idx ); }
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};
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#endif /* LPC_MANAGER_H1103129409_INCLUDE_GUARD_ */
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