thin-provisioning-tools/thin-provisioning/chunk_stream.h
2015-09-04 13:48:02 +01:00

67 lines
1.6 KiB
C++

// Copyright (C) 2015 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#ifndef CHUNK_STREAM_H
#define CHUNK_STREAM_H
#include "block-cache/block_cache.h"
#include <deque>
#include <stdint.h>
//----------------------------------------------------------------
namespace thin_provisioning {
struct mem {
mem()
: begin(0),
end(0) {
}
mem(uint8_t *b, uint8_t *e)
: begin(b),
end(e) {
}
uint8_t *begin, *end;
};
struct chunk {
uint64_t offset_, len_;
mem mem_;
};
class chunk_stream {
public:
virtual ~chunk_stream() {}
virtual void rewind() = 0;
virtual bcache::block_address index() const = 0;
virtual bool next(bcache::block_address count = 1ull) = 0;
virtual bool eof() const = 0;
virtual chunk const &get() = 0;
virtual void put(chunk const &c) = 0;
};
}
//----------------------------------------------------------------
#endif