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refcounted-object.h
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1 /* Base class of intrusively reference-counted objects.
2 Copyright (C) 2017-2018 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_AND_ASSIGN (refcounted_object);
49
50 /* The reference count. */
51 int m_refcount = 0;
52 };
53
54 #endif /* REFCOUNTED_OBJECT_H */
refcounted_object
Definition: refcounted-object.h:26
refcounted_object::m_refcount
int m_refcount
Definition: refcounted-object.h:51
refcounted_object::decref
void decref()
Definition: refcounted-object.h:39
gdb_assert
#define gdb_assert(expr)
Definition: gdb_assert.h:32
refcounted_object::DISABLE_COPY_AND_ASSIGN
DISABLE_COPY_AND_ASSIGN(refcounted_object)
refcounted_object::refcounted_object
refcounted_object()=default
refcounted_object::refcount
int refcount() const
Definition: refcounted-object.h:45
refcounted_object::incref
void incref()
Definition: refcounted-object.h:32