_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 #define DEFINE_CHECK(type) \
  27 static inline int type##_Check (PyObject *o) \
  28 { \
  29     return (o->ob_type == &type##Type) \
  30             || PyObject_IsInstance(o, (PyObject *)&type##Type); \
  31 }
  32
  33 static PyObject *empty_tuple = NULL;
  34
  35 static PyObject *
  36 Glue_tp_richcompare_by_pointer(PyObject *self,
  37                                PyObject *other,
  38                                int op)
  39 {
  40     if (op == Py_EQ || op == Py_NE) {
  41         if (self == other) {
  42             return PyInt_FromLong(op == Py_EQ);
  43         }
  44         return PyInt_FromLong(op == Py_NE);
  45     }
  46     PyErr_SetString(PyExc_TypeError,
  47                     "Instances of this type are not ordered");
  48     return NULL;
  49 }
  50
  51 static long
  52 Glue_tp_hash_by_pointer(PyObject *self)
  53 {
  54     long hash = (long)self;
  55     return (hash == -1L ? -2L : hash);
  56 }
  57
  58 static int
  59 Glue_immutable_setattro(PyObject *obj UNUSED,
  60                         PyObject *name UNUSED,
  61                         PyObject *value UNUSED)
  62 {
  63     PyErr_SetString(PyExc_AttributeError, "Object is immutable");
  64     return -1;
  65 }
  66
  67 /* Take the global interpreter lock and decrement the reference count.
  68  * Suitable for calling from a C callback. */
  69 void
  70 dbus_py_take_gil_and_xdecref(PyObject *obj)
  71 {
  72     PyGILState_STATE gil = PyGILState_Ensure();
  73     Py_XDECREF(obj);
  74     PyGILState_Release(gil);
  75 }
  76
  77 static inline int
  78 init_generic(void)
  79 {
  80     empty_tuple = PyTuple_New(0);
  81     if (!empty_tuple) return 0;
  82     return 1;
  83 }
  84
  85 /* vim:set ft=c cino< sw=4 sts=4 et: */