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- /* Base class of intrusively reference-counted objects.
- Copyright (C) 2017-2022 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 COMMON_REFCOUNTED_OBJECT_H
- #define COMMON_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_AND_ASSIGN (refcounted_object);
- /* The reference count. */
- int m_refcount = 0;
- };
- /* A policy class to interface gdb::ref_ptr with a
- refcounted_object. */
- struct refcounted_object_ref_policy
- {
- static void incref (refcounted_object *ptr)
- {
- ptr->incref ();
- }
- static void decref (refcounted_object *ptr)
- {
- ptr->decref ();
- }
- };
- #endif /* COMMON_REFCOUNTED_OBJECT_H */
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