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/*
* Copyright (c) 2013 SURFnet bv
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*****************************************************************************
Generation.h
Helper for generation number handling.
*****************************************************************************/
#ifndef _SOFTHSM_V2_GENERATION_H
#define _SOFTHSM_V2_GENERATION_H
#include "config.h"
#include <string>
#include "File.h"
#include "MutexFactory.h"
class Generation
{
public:
// Factory
static Generation* create(const std::string inPath, bool inIsToken = false);
// Destructor
virtual ~Generation();
// Synchronize from locked disk file
bool sync(File &objectfile);
// Check if the target was updated
bool wasUpdated();
// Note pending update
void update();
// Commit (for the token case)
void commit();
// Set the current value when read from disk
void set(unsigned long onDisk);
// Return new value
unsigned long get();
// Rollback (called when the new value failed to be written)
void rollback();
private:
// Constructor
Generation(const std::string path, bool isToken);
// The file path
std::string path;
// isToken
bool isToken;
// Pending update
bool pendingUpdate;
// Current value
unsigned long currentValue;
// For thread safeness
Mutex* genMutex;
};
#endif // !_SOFTHSM_V2_GENERATION_H
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