_dbus_bindings/generic.c

   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 #include "dbus_bindings-internal.h"
  27
  28 /* The empty tuple, held globally since dbus-python turns out to use it quite
  29  * a lot
  30  */
  31 PyObject *dbus_py_empty_tuple = NULL;
  32
  33 PyObject *
  34 dbus_py_tp_richcompare_by_pointer(PyObject *self,
  35                                   PyObject *other,
  36                                   int op)
  37 {
  38     if (op == Py_EQ || op == Py_NE) {
  39         if (self == other) {
  40             return PyInt_FromLong(op == Py_EQ);
  41         }
  42         return PyInt_FromLong(op == Py_NE);
  43     }
  44     PyErr_SetString(PyExc_TypeError,
  45                     "Instances of this type are not ordered");
  46     return NULL;
  47 }
  48
  49 long
  50 dbus_py_tp_hash_by_pointer(PyObject *self)
  51 {
  52     long hash = (long)self;
  53     return (hash == -1L ? -2L : hash);
  54 }
  55
  56 int
  57 dbus_py_immutable_setattro(PyObject *obj UNUSED,
  58                         PyObject *name UNUSED,
  59                         PyObject *value UNUSED)
  60 {
  61     PyErr_SetString(PyExc_AttributeError, "Object is immutable");
  62     return -1;
  63 }
  64
  65 /* Take the global interpreter lock and decrement the reference count.
  66  * Suitable for calling from a C callback. */
  67 void
  68 dbus_py_take_gil_and_xdecref(PyObject *obj)
  69 {
  70     PyGILState_STATE gil = PyGILState_Ensure();
  71     Py_XDECREF(obj);
  72     PyGILState_Release(gil);
  73 }
  74
  75 dbus_bool_t
  76 dbus_py_init_generic(void)
  77 {
  78     dbus_py_empty_tuple = PyTuple_New(0);
  79     if (!dbus_py_empty_tuple) return 0;
  80     return 1;
  81 }
  82
  83 /* vim:set ft=c cino< sw=4 sts=4 et: */