MySQL  8.0.17
Source Code Documentation
my_ref_counted.h
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1 /* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
2 
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6 
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13 
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18 
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22 
23 #ifndef MY_REF_COUNTED_H
24 #define MY_REF_COUNTED_H
25 
26 #include <atomic>
27 
28 #include "my_inttypes.h"
29 
30 /**
31  Helper class for reference counting.
32 */
34  public:
37  virtual ~my_ref_counted();
39  bool release_reference(uint64 *new_count = NULL);
41 
42  private:
43  /** the reference count value */
44  std::atomic<uint64> m_count;
45 };
46 
47 #endif /* MY_REF_COUNTED_H */
Some integer typedefs for easier portability.
Sergei Dialog Client Authentication NULL
Definition: dialog.cc:352
unsigned long long uint64
Definition: my_inttypes.h:69
uint64 add_reference()
Increases a reference count.
Definition: my_ref_counted.cc:40
my_ref_counted()
default constructor
Definition: my_ref_counted.cc:26
Helper class for reference counting.
Definition: my_ref_counted.h:33
uint64 get_reference_count() const
Returns the reference counter value.
Definition: my_ref_counted.cc:70
virtual ~my_ref_counted()
Definition: my_ref_counted.cc:33
std::atomic< uint64 > m_count
the reference count value
Definition: my_ref_counted.h:44
bool release_reference(uint64 *new_count=NULL)
Decreases a reference count.
Definition: my_ref_counted.cc:51