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3a3fd0fd PA |
1 | /* Base class of intrusively reference-counted objects. |
2 | Copyright (C) 2017 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
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 3 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, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef REFCOUNTED_OBJECT_H | |
20 | #define REFCOUNTED_OBJECT_H | |
21 | ||
22 | /* Base class of intrusively reference-countable objects. | |
23 | Incrementing and decrementing the reference count is an external | |
24 | responsibility. */ | |
25 | ||
26 | class refcounted_object | |
27 | { | |
28 | public: | |
29 | refcounted_object () = default; | |
30 | ||
31 | /* Increase the refcount. */ | |
32 | void incref () | |
33 | { | |
34 | gdb_assert (m_refcount >= 0); | |
35 | m_refcount++; | |
36 | } | |
37 | ||
38 | /* Decrease the refcount. */ | |
39 | void decref () | |
40 | { | |
41 | m_refcount--; | |
42 | gdb_assert (m_refcount >= 0); | |
43 | } | |
44 | ||
45 | int refcount () const { return m_refcount; } | |
46 | ||
47 | private: | |
48 | /* Disable copy. */ | |
49 | refcounted_object (const refcounted_object &) = delete; | |
50 | refcounted_object &operator=(const refcounted_object &) = delete; | |
51 | ||
52 | /* The reference count. */ | |
53 | int m_refcount = 0; | |
54 | }; | |
55 | ||
56 | #endif /* REFCOUNTED_OBJECT_H */ |