array.h
/*
* This file is part of libsidplayfp, a SID player engine.
*
* Copyright (C) 2011-2014 Leandro Nini
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef ARRAY_H
#define ARRAY_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <atomic>
class counter
{
private:
std::atomic<unsigned int> c;
public:
counter() : c(1) {}
void increase() { ++c; }
unsigned int decrease() { return --c; }
};
template<typename T>
class matrix
{
private:
T* data;
counter* count;
const unsigned int x, y;
public:
matrix(unsigned int x, unsigned int y) :
data(new T[x * y]),
count(new counter()),
x(x),
y(y) {}
matrix(const matrix& p) :
data(p.data),
count(p.count),
x(p.x),
y(p.y) { count->increase(); }
~matrix() { if (count->decrease() == 0) { delete count; delete [] data; } }
unsigned int length() const { return x * y; }
T* operator[](unsigned int a) { return &data[a * y]; }
T const* operator[](unsigned int a) const { return &data[a * y]; }
};
using matrix_t = matrix<short>;
#endif
counter
Definition array.h:35
matrix
Definition array.h:50