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/* Base class of intrusively reference-counted objects.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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 for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef REFCOUNTED_OBJECT_H
#define REFCOUNTED_OBJECT_H
/* Base class of intrusively reference-countable objects.
Incrementing and decrementing the reference count is an external
responsibility. */
class refcounted_object
{
public:
refcounted_object () = default;
/* Increase the refcount. */
void incref ()
{
gdb_assert (m_refcount >= 0);
m_refcount++;
}
/* Decrease the refcount. */
void decref ()
{
m_refcount--;
gdb_assert (m_refcount >= 0);
}
int refcount () const { return m_refcount; }
private:
/* Disable copy. */
refcounted_object (const refcounted_object &) = delete;
refcounted_object &operator=(const refcounted_object &) = delete;
/* The reference count. */
int m_refcount = 0;
};
#endif /* REFCOUNTED_OBJECT_H */
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