/* C API for _dbus_bindings, used by _dbus_glib_bindings and any third-party

 * main loop integration which might happen in future.

 *

 * This file is currently Python-version-independent - please keep it that way.

 *

 * Copyright (C) 2006 Collabora Ltd. <http://www.collabora.co.uk/>

 *

 * Permission is hereby granted, free of charge, to any person

 * obtaining a copy of this software and associated documentation

 * files (the "Software"), to deal in the Software without

 * restriction, including without limitation the rights to use, copy,

 * modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 */

#ifndef DBUS_PYTHON_H

#define DBUS_PYTHON_H

#include <Python.h>

#include <dbus/dbus.h>

#if PY_MAJOR_VERSION >= 3

#define PY3

#define PYDBUS_CAPSULE_NAME "_dbus_bindings._C_API"

#endif

DBUS_BEGIN_DECLS

typedef void (*_dbus_py_func_ptr)(void);

typedef dbus_bool_t (*_dbus_py_conn_setup_func)(DBusConnection *, void *);

typedef dbus_bool_t (*_dbus_py_srv_setup_func)(DBusServer *, void *);

typedef void (*_dbus_py_free_func)(void *);

#define DBUS_BINDINGS_API_COUNT 3

#ifdef INSIDE_DBUS_PYTHON_BINDINGS

extern DBusConnection *DBusPyConnection_BorrowDBusConnection(PyObject *);

extern PyObject *DBusPyNativeMainLoop_New4(_dbus_py_conn_setup_func,

                                           _dbus_py_srv_setup_func,

                                           _dbus_py_free_func,

                                           void *);

#else

static PyObject *_dbus_bindings_module = NULL;

static _dbus_py_func_ptr *dbus_bindings_API;

#define DBusPyConnection_BorrowDBusConnection \

        (*(DBusConnection *(*)(PyObject *))dbus_bindings_API[1])

#define DBusPyNativeMainLoop_New4 \

    ((PyObject *(*)(_dbus_py_conn_setup_func, _dbus_py_srv_setup_func, \

                    _dbus_py_free_func, void *))dbus_bindings_API[2])

static int

import_dbus_bindings(const char *this_module_name)

{

    PyObject *c_api;

    int count;

    _dbus_bindings_module = PyImport_ImportModule("_dbus_bindings");

    if (!_dbus_bindings_module) {

        return -1;

    }

    c_api = PyObject_GetAttrString(_dbus_bindings_module, "_C_API");

    if (c_api == NULL) return -1;

#ifdef PY3

    dbus_bindings_API = NULL;

    if (PyCapsule_IsValid(c_api, PYDBUS_CAPSULE_NAME)) {

        dbus_bindings_API = (_dbus_py_func_ptr *)PyCapsule_GetPointer(

            c_api, PYDBUS_CAPSULE_NAME);

    }

    Py_CLEAR(c_api);

    if (!dbus_bindings_API) {

        PyErr_SetString(PyExc_RuntimeError, "C API is not a PyCapsule");

        return -1;

    }

#else

    if (PyCObject_Check(c_api)) {

        dbus_bindings_API = (_dbus_py_func_ptr *)PyCObject_AsVoidPtr(c_api);

    }

    else {

        Py_DECREF(c_api);

        PyErr_SetString(PyExc_RuntimeError, "C API is not a PyCObject");

        return -1;

    }

    Py_DECREF (c_api);

#endif

    count = *(int *)dbus_bindings_API[0];

    if (count < DBUS_BINDINGS_API_COUNT) {

        PyErr_Format(PyExc_RuntimeError,

                     "_dbus_bindings has API version %d but %s needs "

                     "_dbus_bindings API version at least %d",

                     count, this_module_name,

                     DBUS_BINDINGS_API_COUNT);

        return -1;

    }

    return 0;

}

#endif

DBUS_END_DECLS

#endif