libsidplayfp 2.15.0
array.h
1/*
2 * This file is part of libsidplayfp, a SID player engine.
3 *
4 * Copyright (C) 2011-2014 Leandro Nini
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef ARRAY_H
22#define ARRAY_H
23
24
25#ifdef HAVE_CONFIG_H
26# include "config.h"
27#endif
28
29#include <atomic>
30
35{
36private:
37 std::atomic<unsigned int> c;
38
39public:
40 counter() : c(1) {}
41 void increase() { ++c; }
42 unsigned int decrease() { return --c; }
43};
44
48template<typename T>
49class matrix
50{
51private:
52 T* data;
53 counter* count;
54 const unsigned int x, y;
55
56public:
57 matrix(unsigned int x, unsigned int y) :
58 data(new T[x * y]),
59 count(new counter()),
60 x(x),
61 y(y) {}
62
63 matrix(const matrix& p) :
64 data(p.data),
65 count(p.count),
66 x(p.x),
67 y(p.y) { count->increase(); }
68
69 ~matrix() { if (count->decrease() == 0) { delete count; delete [] data; } }
70
71 unsigned int length() const { return x * y; }
72
73 T* operator[](unsigned int a) { return &data[a * y]; }
74
75 T const* operator[](unsigned int a) const { return &data[a * y]; }
76};
77
79
80#endif
Definition array.h:35
Definition array.h:50