include/dbus-python.h

   1 /* C API for _dbus_bindings, used by _dbus_glib_bindings and any third-party
   2  * main loop integration which might happen in future.
   3  *
   4  * This file is currently Python-version-independent - please keep it that way.
   5  *
   6  * Copyright (C) 2006 Collabora Ltd.
   7  *
   8  * Licensed under the Academic Free License version 2.1
   9  *
  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  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  *
  26  */
  27
  28 #ifndef DBUS_PYTHON_H
  29 #define DBUS_PYTHON_H
  30
  31 #include <Python.h>
  32 #define DBUS_API_SUBJECT_TO_CHANGE 1
  33 #include <dbus/dbus.h>
  34
  35 DBUS_BEGIN_DECLS
  36
  37 typedef void (*_dbus_py_func_ptr)(void);
  38
  39 typedef dbus_bool_t (*_dbus_py_conn_setup_func)(DBusConnection *, void *);
  40 typedef dbus_bool_t (*_dbus_py_srv_setup_func)(DBusServer *, void *);
  41 typedef void (*_dbus_py_free_func)(void *);
  42
  43 #define DBUS_BINDINGS_API_COUNT 3
  44
  45 #ifdef INSIDE_DBUS_PYTHON_BINDINGS
  46
  47 extern DBusConnection *DBusPyConnection_BorrowDBusConnection(PyObject *);
  48 extern PyObject *DBusPyNativeMainLoop_New4(_dbus_py_conn_setup_func,
  49                                            _dbus_py_srv_setup_func,
  50                                            _dbus_py_free_func,
  51                                            void *);
  52
  53 #else
  54
  55 static PyObject *_dbus_bindings_module = NULL;
  56 static _dbus_py_func_ptr *dbus_bindings_API;
  57
  58 #define DBusPyConnection_BorrowDBusConnection \
  59         (*(DBusConnection *(*)(PyObject *))dbus_bindings_API[1])
  60 #define DBusPyNativeMainLoop_New4 \
  61     ((PyObject *(*)(_dbus_py_conn_setup_func, _dbus_py_srv_setup_func, \
  62                     _dbus_py_free_func, void *))dbus_bindings_API[2])
  63
  64 static int
  65 import_dbus_bindings(const char *this_module_name)
  66 {
  67     PyObject *c_api;
  68     int count;
  69
  70     _dbus_bindings_module = PyImport_ImportModule("_dbus_bindings");
  71     if (!_dbus_bindings_module) {
  72         return -1;
  73     }
  74     c_api = PyObject_GetAttrString(_dbus_bindings_module, "_C_API");
  75     if (c_api == NULL) return -1;
  76     if (PyCObject_Check(c_api)) {
  77         dbus_bindings_API = (_dbus_py_func_ptr *)PyCObject_AsVoidPtr(c_api);
  78     }
  79     else {
  80         Py_DECREF(c_api);
  81         PyErr_SetString(PyExc_RuntimeError, "C API is not a PyCObject");
  82         return -1;
  83     }
  84     Py_DECREF (c_api);
  85     count = *(int *)dbus_bindings_API[0];
  86     if (count < DBUS_BINDINGS_API_COUNT) {
  87         PyErr_Format(PyExc_RuntimeError,
  88                      "_dbus_bindings has API version %d but %s needs "
  89                      "_dbus_bindings API version at least %d",
  90                      count, this_module_name,
  91                      DBUS_BINDINGS_API_COUNT);
  92         return -1;
  93     }
  94     return 0;
  95 }
  96
  97 #endif
  98
  99 DBUS_END_DECLS
 100
 101 #endif