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/*
* Copyright (c) 2002-2006 Samit Basu
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __HandleList_hpp__
#define __HandleList_hpp__
#include <map>
#include <QMutex>
#include <QMutexLocker>
#include "Exception.hpp"
#include <QFile>
template<class T>
class HandleList {
typedef T value_type;
std::map<unsigned int, T, std::less<unsigned int> > handles;
unsigned int max_handle;
QMutex mutex;
public:
HandleList() : max_handle(0) {
}
~HandleList() {
}
unsigned int maxHandle() {
return max_handle;
}
unsigned int assignHandle(T val) {
QMutexLocker locker(&mutex);
unsigned nxt = 0;
bool freeHandleFound = false;
while ((nxt < max_handle) && !freeHandleFound) {
freeHandleFound = (handles.count(nxt) == 0);
if (!freeHandleFound) nxt++;
}
handles[nxt] = val;
if (nxt >= max_handle) max_handle++;
return nxt+1;
}
T lookupHandle(unsigned int handle) {
QMutexLocker locker(&mutex);
if (handles.count(handle-1) == 0)
throw Exception("Invalid handle!");
return handles[handle-1];
}
void deleteHandle(unsigned int handle) {
QMutexLocker locker(&mutex);
if ((handle-1) == max_handle)
max_handle--;
handles.erase(handle-1);
}
};
class FilePtr {
public:
QFile *fp;
bool swapflag;
};
#endif
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