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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004-2016 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program 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 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
#ifndef __QT_THREAD_SAFE_MEMORY_INFO_H
#define __QT_THREAD_SAFE_MEMORY_INFO_H
#include <QReadWriteLock>
#include <wrap/system/memory_info.h>
namespace vcg
{
class QtThreadSafeMemoryInfo : public vcg::NotThreadSafeMemoryInfo
{
public:
QtThreadSafeMemoryInfo(std::ptrdiff_t originalmem)
:vcg::NotThreadSafeMemoryInfo(originalmem),lock(QReadWriteLock::Recursive)
{
}
~QtThreadSafeMemoryInfo()
{
}
void acquiredMemory(std::ptrdiff_t mem)
{
QWriteLocker locker(&lock);
vcg::NotThreadSafeMemoryInfo::acquiredMemory(mem);
}
std::ptrdiff_t usedMemory() const
{
QReadLocker locker(&lock);
return vcg::NotThreadSafeMemoryInfo::usedMemory();
}
std::ptrdiff_t currentFreeMemory() const
{
QReadLocker locker(&lock);
return vcg::NotThreadSafeMemoryInfo::currentFreeMemory();
}
void releasedMemory(std::ptrdiff_t mem = 0)
{
QWriteLocker locker(&lock);
vcg::NotThreadSafeMemoryInfo::releasedMemory(mem);
}
bool isAdditionalMemoryAvailable(std::ptrdiff_t mem)
{
QReadLocker locker(&lock);
return vcg::NotThreadSafeMemoryInfo::isAdditionalMemoryAvailable(mem);
}
private:
//mutable objects can be modified from the declared const functions
//in this way we have not to modified the basic vcg::MemoryInfo interface for the logically const functions
//whose need to lock the mutex for a simple reading operation
mutable QReadWriteLock lock;
};
}
#endif
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