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// Copyright (c) 2011, Cornell University
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of HyperDex nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#ifndef hyperdisk_shard_snapshot_h_
#define hyperdisk_shard_snapshot_h_
// e
#include <e/intrusive_ptr.h>
#include <e/slice.h>
// HyperDisk
#include "hyperdisk/hyperdisk/returncode.h"
#include "hyperdisk/shard_constants.h"
// Forward Declarations
namespace hyperdisk
{
class shard;
}
namespace hyperdisk
{
class shard_snapshot
{
public:
shard_snapshot(uint32_t offset, shard* s);
shard_snapshot(const shard_snapshot& other);
~shard_snapshot() throw ();
public:
bool valid();
bool valid(const hyperspacehashing::mask::coordinate& coord);
void next();
public:
hyperspacehashing::mask::coordinate coordinate() { return m_coord; }
uint64_t version();
const e::slice& key();
const std::vector<e::slice>& value();
public:
shard_snapshot& operator = (const shard_snapshot& rhs);
private:
void parse();
private:
shard* m_shard;
uint32_t m_limit;
uint32_t m_entry;
bool m_valid;
bool m_parsed;
hyperspacehashing::mask::coordinate m_coord;
uint64_t m_version;
e::slice m_key;
std::vector<e::slice> m_value;
};
} // namespace hyperdisk
#endif // hyperdisk_shard_snapshot_h_
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