gdb/python/py-ref.h

   1 /* Python reference-holding class
   2
   3    Copyright (C) 2016-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef PYTHON_PY_REF_H
  21 #define PYTHON_PY_REF_H
  22
  23 #include "gdbsupport/gdb_ref_ptr.h"
  24
  25 /* A policy class for gdb::ref_ptr for Python reference counting.  */
  26 template<typename T>
  27 struct gdbpy_ref_policy
  28 {
  29   static void incref (T *ptr)
  30   {
  31     Py_INCREF (ptr);
  32   }
  33
  34   static void decref (T *ptr)
  35   {
  36     Py_DECREF (ptr);
  37   }
  38 };
  39
  40 /* A gdb::ref_ptr that has been specialized for Python objects or
  41    their "subclasses".  */
  42 template<typename T = PyObject> using gdbpy_ref
  43   = gdb::ref_ptr<T, gdbpy_ref_policy<T>>;
  44
  45 #endif /* PYTHON_PY_REF_H */