Developer World
Spresense SDK Library v3.2.0-ebc0364
al_singleton.h
1/****************************************************************************
2 * modules/include/audiolite/al_singleton.h
3 *
4 * Copyright 2023 Sony Semiconductor Solutions Corporation
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 * 3. Neither the name of Sony Semiconductor Solutions Corporation nor
17 * the names of its contributors may be used to endorse or promote
18 * products derived from this software without specific prior written
19 * permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 *
34 ****************************************************************************/
35
36#ifndef __INCLUDE_AUDIOLITE_SINGLETON_H
37#define __INCLUDE_AUDIOLITE_SINGLETON_H
38
39/****************************************************************************
40 * Pre-processor Definitions
41 ****************************************************************************/
42
43#define SINGLETON_MEMBER(t) static t *_inst
44#define SINGLETON_INST(t) t *t::_inst = NULL
45#define SINGLETON_METHODS(t) static t *get_instance() \
46 { if (_inst == NULL) {_inst = new t;} return _inst; }; \
47 static void terminate_instance() { \
48 if (_inst) { delete _inst; _inst = NULL; } }
49
50#endif /* __INCLUDE_AUDIOLITE_SINGLETON_H */