1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/libmem/include/mem/memory_incremental.h Thu Apr 15 23:15:17 2021 +0200
1.3 @@ -0,0 +1,61 @@
1.4 +/*
1.5 + * A memory pool allocating a region at a time from the system.
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 <mutex>
1.30 +
1.31 +#include <mem/memory.h>
1.32 +#include <mem/memory_utils.h>
1.33 +
1.34 +
1.35 +
1.36 +/* A memory pool abstraction. */
1.37 +
1.38 +class MemoryIncremental : public Memory
1.39 +{
1.40 +protected:
1.41 + std::mutex _lock;
1.42 +
1.43 + unsigned int _limit;
1.44 + offset_t _region_size;
1.45 + bool _limited;
1.46 +
1.47 + Region *allocate(offset_t size);
1.48 +
1.49 +public:
1.50 + explicit MemoryIncremental(unsigned int limit, offset_t region_size=PAGE_SIZE);
1.51 +
1.52 + explicit MemoryIncremental();
1.53 +
1.54 + virtual Region *region(offset_t size);
1.55 +
1.56 + virtual Region *region();
1.57 +
1.58 + virtual offset_t region_size()
1.59 + { return _region_size; }
1.60 +
1.61 + virtual void release(Region *region);
1.62 +};
1.63 +
1.64 +// vim: tabstop=4 expandtab shiftwidth=4