1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/libmem/include/mem/region.h Thu Apr 15 23:15:17 2021 +0200
1.3 @@ -0,0 +1,80 @@
1.4 +/*
1.5 + * Memory region abstractions.
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 <systypes/base.h>
1.28 +
1.29 +#include "types.h"
1.30 +
1.31 +
1.32 +
1.33 +/* Region-related state information. */
1.34 +
1.35 +class RegionState
1.36 +{
1.37 +public:
1.38 + unsigned long size;
1.39 + fileid_t fileid;
1.40 + offset_t filepos;
1.41 +
1.42 + explicit RegionState(unsigned long size=0, fileid_t fileid=0, offset_t filepos=0);
1.43 +
1.44 + void fill(fileid_t fileid, offset_t filepos);
1.45 +
1.46 + bool valid() { return size != 0; }
1.47 +};
1.48 +
1.49 +
1.50 +
1.51 +/* A memory region abstraction. */
1.52 +
1.53 +class Region
1.54 +{
1.55 +public:
1.56 + offset_t start, end;
1.57 +
1.58 + /* Debugging information. */
1.59 +
1.60 + RegionState state;
1.61 +
1.62 + /* Methods. */
1.63 +
1.64 + explicit Region(offset_t start, offset_t end);
1.65 +
1.66 + virtual ~Region();
1.67 +
1.68 + offset_t size();
1.69 +
1.70 + int compare(Region *other);
1.71 +
1.72 + void fill(fileid_t fileid, offset_t filepos);
1.73 +
1.74 + void flush();
1.75 +
1.76 + /* Simulation methods. */
1.77 +
1.78 + char *read(offset_t offset=0);
1.79 +
1.80 + void write(const char *data, offset_t offset=0);
1.81 +};
1.82 +
1.83 +// vim: tabstop=4 expandtab shiftwidth=4