92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2012 University of California, Los Angeles
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
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* Chaoyi Bian <bcy@pku.edu.cn>
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* Alexander Afanasyev <alexander.afanasyev@ucla.edu>
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*/
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#ifndef SYNC_DIFF_LEAF_H
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#define SYNC_DIFF_LEAF_H
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#include "sync-leaf.h"
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#include <boost/exception/all.hpp>
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namespace Sync {
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/**
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* @ingroup sync
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* @brief Annotation for SYNC leaf
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*/
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enum Operation
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{
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UPDATE, ///< @brief Leaf was added or updated
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REMOVE ///< @brief Leaf was removed
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};
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/**
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* @ingroup sync
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* @brief Annotated SYNC leaf
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*/
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class DiffLeaf : public Leaf
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{
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public:
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/**
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* @brief Constructor to create an UPDATE diff leaf
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* @param info Smart pointer to leaf's name
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* @param seq Initial sequence number of the pointer
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*/
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DiffLeaf (NameInfoConstPtr info, const SeqNo &seq);
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/**
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* @brief Constructor to create an REMOVE diff leaf
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* @param info Smart pointer to leaf's name
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*
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* This constructor creates a leaf with phony sequence number
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* with 0 session ID and 0 sequence number
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*/
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DiffLeaf (NameInfoConstPtr info);
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virtual ~DiffLeaf () { }
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/**
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* @brief Get diff leaf type
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*/
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Operation
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getOperation () const { return m_op; }
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private:
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Operation m_op;
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};
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typedef shared_ptr<DiffLeaf> DiffLeafPtr;
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typedef shared_ptr<const DiffLeaf> DiffLeafConstPtr;
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std::ostream &
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operator << (std::ostream &os, Operation op);
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std::istream &
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operator >> (std::istream &is, Operation &op);
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namespace Error {
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struct SyncDiffLeafOperationParseError : virtual boost::exception, virtual std::exception { };
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} // Error
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} // Sync
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#endif // SYNC_DIFF_LEAF_H
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