48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL hereby grant you an additional
|
|
permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License, version 2.0, for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
#ifndef MY_REF_COUNTED_H
|
|
#define MY_REF_COUNTED_H
|
|
|
|
#include <atomic>
|
|
|
|
#include "my_inttypes.h"
|
|
|
|
/**
|
|
Helper class for reference counting.
|
|
*/
|
|
class my_ref_counted {
|
|
public:
|
|
my_ref_counted();
|
|
my_ref_counted(my_ref_counted &other);
|
|
virtual ~my_ref_counted();
|
|
uint64 add_reference();
|
|
bool release_reference(uint64 *new_count = NULL);
|
|
uint64 get_reference_count() const;
|
|
|
|
private:
|
|
/** the reference count value */
|
|
std::atomic<uint64> m_count;
|
|
};
|
|
|
|
#endif /* MY_REF_COUNTED_H */
|