MySQL 9.1.0
Source Code Documentation
my_ref_counted.h
Go to the documentation of this file.
1/* Copyright (c) 2016, 2024, Oracle and/or its affiliates.
2
3This program is free software; you can redistribute it and/or modify
4it under the terms of the GNU General Public License, version 2.0,
5as published by the Free Software Foundation.
6
7This program is designed to work with certain software (including
8but not limited to OpenSSL) that is licensed under separate terms,
9as designated in a particular file or component or in included license
10documentation. The authors of MySQL hereby grant you an additional
11permission to link the program and your derivative works with the
12separately licensed software that they have either included with
13the program or referenced in the documentation.
14
15This program is distributed in the hope that it will be useful,
16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18GNU General Public License, version 2.0, for more details.
19
20You should have received a copy of the GNU General Public License
21along with this program; if not, write to the Free Software
22Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
23
24#ifndef MY_REF_COUNTED_H
25#define MY_REF_COUNTED_H
26
27#include <atomic>
28
29#include "my_inttypes.h"
30
31/**
32 Helper class for reference counting.
33*/
35 public:
38 virtual ~my_ref_counted();
40 bool release_reference(uint64 *new_count = nullptr);
42
43 private:
44 /** the reference count value */
45 std::atomic<uint64> m_count;
46};
47
48#endif /* MY_REF_COUNTED_H */
Helper class for reference counting.
Definition: my_ref_counted.h:34
std::atomic< uint64 > m_count
the reference count value
Definition: my_ref_counted.h:45
bool release_reference(uint64 *new_count=nullptr)
Decreases a reference count.
Definition: my_ref_counted.cc:52
uint64 get_reference_count() const
Returns the reference counter value.
Definition: my_ref_counted.cc:71
virtual ~my_ref_counted()
uint64 add_reference()
Increases a reference count.
Definition: my_ref_counted.cc:41
my_ref_counted()
default constructor
Definition: my_ref_counted.cc:27
Some integer typedefs for easier portability.
uint64_t uint64
Definition: my_inttypes.h:69