_dbus_bindings/generic-impl.h

   1 /* General Python glue code, used in _dbus_bindings but not actually anything
   2  * to do with D-Bus.
   3  *
   4  * Copyright (C) 2006 Collabora Ltd.
   5  *
   6  * Licensed under the Academic Free License version 2.1
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  */
  25
  26 PyObject *dbus_py_empty_tuple = NULL;
  27
  28 static PyObject *
  29 Glue_tp_richcompare_by_pointer(PyObject *self,
  30                                PyObject *other,
  31                                int op)
  32 {
  33     if (op == Py_EQ || op == Py_NE) {
  34         if (self == other) {
  35             return PyInt_FromLong(op == Py_EQ);
  36         }
  37         return PyInt_FromLong(op == Py_NE);
  38     }
  39     PyErr_SetString(PyExc_TypeError,
  40                     "Instances of this type are not ordered");
  41     return NULL;
  42 }
  43
  44 static long
  45 Glue_tp_hash_by_pointer(PyObject *self)
  46 {
  47     long hash = (long)self;
  48     return (hash == -1L ? -2L : hash);
  49 }
  50
  51 static int
  52 Glue_immutable_setattro(PyObject *obj UNUSED,
  53                         PyObject *name UNUSED,
  54                         PyObject *value UNUSED)
  55 {
  56     PyErr_SetString(PyExc_AttributeError, "Object is immutable");
  57     return -1;
  58 }
  59
  60 /* Take the global interpreter lock and decrement the reference count.
  61  * Suitable for calling from a C callback. */
  62 void
  63 dbus_py_take_gil_and_xdecref(PyObject *obj)
  64 {
  65     PyGILState_STATE gil = PyGILState_Ensure();
  66     Py_XDECREF(obj);
  67     PyGILState_Release(gil);
  68 }
  69
  70 static inline int
  71 init_generic(void)
  72 {
  73     dbus_py_empty_tuple = PyTuple_New(0);
  74     if (!dbus_py_empty_tuple) return 0;
  75     return 1;
  76 }
  77
  78 /* vim:set ft=c cino< sw=4 sts=4 et: */