1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/libfsserver/include/fsserver/accessor.h Thu Apr 15 23:15:17 2021 +0200
1.3 @@ -0,0 +1,63 @@
1.4 +/*
1.5 + * Generic accessor functionality.
1.6 + *
1.7 + * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#pragma once
1.26 +
1.27 +#include <mem/flexpage.h>
1.28 +
1.29 +
1.30 +
1.31 +/* A file accessor, providing flexpages corresponding to file regions. */
1.32 +
1.33 +class Accessor
1.34 +{
1.35 +protected:
1.36 + offset_t _size;
1.37 +
1.38 + /* Data transfer helper methods. */
1.39 +
1.40 + virtual void fill_populated(Flexpage *flexpage);
1.41 +
1.42 + virtual void flush_populated(Flexpage *flexpage);
1.43 +
1.44 +public:
1.45 + fileid_t fileid;
1.46 +
1.47 + explicit Accessor(fileid_t fileid, offset_t size=0);
1.48 +
1.49 + virtual ~Accessor();
1.50 +
1.51 + virtual offset_t get_size();
1.52 +
1.53 + virtual void set_size(offset_t size);
1.54 +
1.55 + virtual void close();
1.56 +
1.57 + virtual void open();
1.58 +
1.59 + /* Data transfer methods. */
1.60 +
1.61 + virtual void fill(Flexpage *flexpage);
1.62 +
1.63 + virtual void flush(Flexpage *flexpage);
1.64 +};
1.65 +
1.66 +// vim: tabstop=4 expandtab shiftwidth=4