path: root/python/dbus_bindings.pyx.in

# -*- Mode: Python -*-

#include "dbus_h_wrapper.h"

cdef extern from "stdlib.h":
    cdef void *malloc(size_t size)
    cdef void free(void *ptr)

cdef extern from "dbus-glib.h":
    ctypedef struct GMainContext
    cdef void dbus_connection_setup_with_g_main (DBusConnection *connection,
                                                 GMainContext   *context)
    cdef void dbus_server_setup_with_g_main     (DBusServer     *server,
                                                 GMainContext   *context)

cdef extern from "Python.h":
    void Py_XINCREF (object)
    void Py_XDECREF (object)


ctypedef struct DBusError:
    char *name
    char *message
    unsigned int dummy1 
    unsigned int dummy2
    unsigned int dummy3
    unsigned int dummy4
    unsigned int dummy5
    void *padding1
    
ctypedef struct DBusMessageIter:
    void *dummy1
    void *dummy2
    dbus_uint32_t dummy3
    int dummy4
    int dummy5
    int dummy6
    int dummy7
    int dummy8
    int dummy9
    int dummy10
    int dummy11
    int pad1
    int pad2
    void *pad3

ctypedef struct DBusObjectPathVTable:
  DBusObjectPathUnregisterFunction   unregister_function
  DBusObjectPathMessageFunction      message_function
  void (* dbus_internal_pad1) (void *)
  void (* dbus_internal_pad2) (void *)
  void (* dbus_internal_pad3) (void *)
  void (* dbus_internal_pad4) (void *)


_user_data_references = [ ]

class DBusException(Exception):
    pass

class ConnectionError(Exception):
    pass

cdef void cunregister_function_handler (DBusConnection *connection,
                                        void *user_data):
    tup = <object>user_data
    assert (type(tup) == list)    
    function = tup[0]
    args = [Connection(_conn=<object>connection)]
    function(*args)

cdef DBusHandlerResult cmessage_function_handler (DBusConnection *connection,
                                                  DBusMessage *msg,
                                                  void *user_data):
    tup = <object>user_data
    assert (type(tup) == list)
    function = tup[1]
    message = Message(_create=0)
    message._set_msg(<object>msg)
    args = [Connection(_conn=<object>connection),
            message]
    retval = function(*args)
    if (retval == None):
        retval = DBUS_HANDLER_RESULT_HANDLED
    return retval

cdef DBusHandlerResult chandle_message_function_handler (DBusConnection *connection,
                                                        DBusMessage *msg,
                                                        void *user_data):
    function = <object>user_data
    assert (type(function) == function)
    messagein = Message(_create=0)
    messagein._set_msg(<object>msg)
    args = [Connection(_conn=<object>connection),
            messagein]
    retval = function(*args)
    if (retval == None):
        retval = DBUS_HANDLER_RESULT_HANDLED
    return retval    

cdef class Connection:
    cdef DBusConnection *conn
    
    # FIXME: this is a major major hack. We use this because casting values to
    # python objects and returning seemed to be corrupting them. This is a "global variable" :-(
    cdef char **_parsed_path

    def __init__(self, address=None, _conn=None):
        cdef DBusError error
        dbus_error_init(&error)
        if <DBusConnection*>_conn != NULL:
            self.conn = <DBusConnection*>_conn
            dbus_connection_ref(self.conn)
        else:
            self.conn = dbus_connection_open(address,
                                             &error)
            if dbus_error_is_set(&error):
                raise DBusException, error.message
            
        dbus_connection_ref(self.conn)

    def _set_conn(self, conn):
        self.conn = <DBusConnection*>conn
        
    def _get_conn(self):
        return <object>self.conn
    
    #FIXME: this is totally busted, don't use a class shared member like parsed_path
    def _build_parsed_path(self, path_element_list):
        cdef char **cpatharray        
        size = len(path_element_list)
        cpatharray = <char **>malloc(sizeof(char*) * (size + 1))

        for i in range(size):
            path_element = path_element_list[i]
            cpatharray[i] = path_element
            
        cpatharray[size] = NULL

        self._parsed_path = cpatharray

    def get_base_service(self):
        return bus_get_base_service(self)

    def setup_with_g_main(self):
        dbus_connection_setup_with_g_main(self.conn, NULL)

    def disconnect(self):
        dbus_connection_disconnect(self.conn)

    def get_is_connected(self):
        return dbus_connection_get_is_connected(self.conn)
    
    def get_is_authenticated(self):
        return dbus_connection_get_is_authenticated(self.conn)

    def flush(self):
        dbus_connection_flush(self.conn)

    def borrow_message(self):
        m = Message(_create=0)
        m._set_msg(<object>dbus_connection_borrow_message(self.conn))
        return m
    
    def return_message(self, message):
        msg = message._get_msg()
        dbus_connection_return_message(self.conn, <DBusMessage*>msg)

    def steal_borrowed_message(self, message):
        msg = message._get_msg()
        dbus_connection_steal_borrowed_message(self.conn,
                                               <DBusMessage*>msg)
    
    def pop_message(self):
        cdef DBusMessage *msg
        msg = dbus_connection_pop_message(self.conn)
        if msg != NULL:
            m = Message(_create=0)
            m._set_msg(<object>msg)
        else:
            m = None
        return m        

    def get_dispatch_status(self):
        return dbus_connection_get_dispatch_status(self.conn)
    
    def dispatch(self):
        return dbus_connection_dispatch(self.conn)

    def send(self, message):
        #cdef dbus_uint32_t client_serial
        #if type(message) != Message:
        #    raise TypeError
        
        msg = message._get_msg()
        retval = dbus_connection_send(self.conn,
                                      <DBusMessage*>msg,
                                      NULL)
        return retval

    def send_with_reply(self, message, timeout_milliseconds):
        cdef dbus_bool_t retval
        cdef DBusPendingCall *cpending_call
        cdef DBusError error
        dbus_error_init(&error)

        cpending_call = NULL
        
        msg = message._get_msg()

        retval = dbus_connection_send_with_reply(self.conn,
                                                 <DBusMessage*>msg,
                                                 &cpending_call,
                                                 timeout_milliseconds)

        if dbus_error_is_set(&error):
            raise DBusException, error.message

        if (cpending_call != NULL):
            pending_call = PendingCall(<object>cpending_call)
        else:
            pending_call = None

        return (retval, pending_call)
                                
    def send_with_reply_and_block(self, message,
                                  timeout_milliseconds=0):
        cdef DBusMessage * retval
        cdef DBusError error
        dbus_error_init(&error)

        msg = message._get_msg()

        retval = dbus_connection_send_with_reply_and_block(
            <DBusConnection*>self.conn,
            <DBusMessage*>msg,
            <int>timeout_milliseconds,
            &error)

        if dbus_error_is_set(&error):
            raise DBusException, error.message

        if retval == NULL:
            raise AssertionError
        
        m = Message(_create=0)
        m._set_msg(<object>retval)
        return m

    def set_watch_functions(self, add_function, remove_function, data):
        pass

    def set_timeout_functions(self, add_function, remove_function, data):
        pass

    def set_wakeup_main_function(self, wakeup_main_function, data):
        pass

    # FIXME: set_dispatch_status_function, get_unix_user, set_unix_user_function

    def add_filter(self, function):
        return dbus_connection_add_filter(self.conn,
                                          chandle_message_function_handler,
                                          <void*>function,
                                          NULL)


    #FIXME: remove_filter
    #       this is pretty tricky, we want to only remove the filter
    #       if we truly have no more calls to our message_function_handler...ugh

    def set_data(self, slot, data):
        pass

    def get_data(self, slot):
        pass

    def set_max_message_size(self, size):
        dbus_connection_set_max_message_size(self.conn, size)

    def get_max_message_size(self):
        return dbus_connection_get_max_message_size(self.conn)

    def set_max_received_size(self, size):
        dbus_connection_set_max_received_size(self.conn, size)

    def get_max_received_size(self):
        return dbus_connection_get_max_received_size(self.conn)

    def get_outgoing_size(self):
        return dbus_connection_get_outgoing_size(self.conn)    

    # preallocate_send, free_preallocated_send, send_preallocated

    def register_object_path(self, path, unregister_cb, message_cb):
        cdef DBusObjectPathVTable cvtable
        
        cvtable.unregister_function = cunregister_function_handler 
        cvtable.message_function    = cmessage_function_handler

        user_data = [unregister_cb, message_cb]
        global _user_data_references
        _user_data_references.append(user_data)
        
        path_element_list = path[1:].split('/')
        self._build_parsed_path(path_element_list)
        
        return dbus_connection_register_object_path(self.conn, self._parsed_path, &cvtable,
                                                    <void*>user_data) 

    def register_fallback(self, path, unregister_cb, message_cb):
        cdef DBusObjectPathVTable cvtable

        cvtable.unregister_function = cunregister_function_handler 
        cvtable.message_function    = cmessage_function_handler

        user_data = [unregister_cb, message_cb]
        global _user_data_references
        _user_data_references.append(user_data)        
        
        path_element_list = path[1:].split('/')
        self._build_parsed_path(path_element_list)
        
        return dbus_connection_register_fallback(self.conn, self._parsed_path, &cvtable,
                                                 <void*>user_data) 

    #FIXME: unregister_object_path , see problems with remove_filter

    def list_registered (self, parent_path):
        cdef char **cchild_entries
        cdef dbus_bool_t retval
        
        path_element_list = parent_path[1:].split('/')
        self._build_parsed_path(path_element_list)
        
        retval = dbus_connection_list_registered(self.conn, self._parsed_path, &cchild_entries)

        if (not retval):
            #FIXME: raise out of memory exception?
            return None

        i = 0
        child_entries = []

        while (cchild_entries[i] != NULL):
            child_entries.append(cchild_entries[i])
            i = i + 1

        dbus_free_string_array(cchild_entries)

        return child_entries

    
cdef class PendingCall:
    cdef DBusPendingCall *pending_call

    def __init__(self, _pending_call):
        self.pending_call = <DBusPendingCall*>_pending_call
        dbus_pending_call_ref(self.pending_call)
        
    def _get_pending_call(self):
        return <object>self.pending_call

    def cancel(self):
        dbus_pending_call_cancel(self.pending_call)

    def get_completed(self):
        return dbus_pending_call_get_completed(self.pending_call)

    def get_reply(self):
        message = Message(_create=0)
        message._set_msg(<object>dbus_pending_call_get_reply(self.pending_call))
        return message

    def block(self):
        dbus_pending_call_block(self.pending_call)

cdef class Watch:
    cdef DBusWatch* watch
    def __init__(self, cwatch):
        self.watch = <DBusWatch*>cwatch

    def get_fd(self):
        return dbus_watch_get_fd(self.watch)

    # FIXME: not picked up correctly by extract.py
    #def get_flags(self):
    #    return dbus_watch_get_flags(self.watch)

    def handle(self, flags):
        return dbus_watch_handle(self.watch, flags)

    def get_enabled(self):
        return dbus_watch_get_enabled(self.watch)
    
cdef class MessageIter:
    cdef DBusMessageIter *iter
    cdef DBusMessageIter real_iter


    def __init__(self, message):
        self.iter = &self.real_iter
        msg = message._get_msg()
        dbus_message_iter_init(<DBusMessage*>msg, self.iter)
    
    def get_iter(self):
        return <object>self.iter

    def has_next(self):
        return dbus_message_iter_has_next(self.iter)
    
    def next(self):
        return dbus_message_iter_next(self.iter)

    def get(self):
        arg_type = self.get_arg_type()

        if arg_type == TYPE_INVALID:
            raise TypeError, 'Invalid arg type in MessageIter'
        elif arg_type == TYPE_STRING:
            retval = self.get_string()
        elif arg_type == TYPE_INT32:
            retval = self.get_int32()
        elif arg_type == TYPE_UINT32:
            retval = self.get_uint32()
        elif arg_type == TYPE_DOUBLE:
            retval = self.get_double()
        elif arg_type == TYPE_BYTE:
            retval = self.get_byte()
        elif arg_type == TYPE_BOOLEAN:
            retval = self.get_boolean()
        elif arg_type == TYPE_ARRAY:
            array_type = self.get_array_type()

            if array_type == TYPE_STRING:
                retval = self.get_string_array()
            elif array_type == TYPE_BOOLEAN:
                retval = self.get_boolean_array()
            else:
                raise TypeError, "Unknown array type %d in MessageIter" % (array_type)
        else:
            raise TypeError, 'Unknown arg type %d in MessageIter' % (argtype)

        return retval
    
    def get_arg_type(self):
        return dbus_message_iter_get_arg_type(self.iter)

    def get_array_type(self):
        return dbus_message_iter_get_array_type(self.iter)

    #FIXME: implement get_byte
    #def get_byte(self):
    #    return dbus_message_iter_get_byte(self.iter)

    def get_boolean(self):
        return dbus_message_iter_get_boolean(self.iter)
    
    def get_int32(self):
        return dbus_message_iter_get_int32(self.iter)

    def get_uint32(self):
        return dbus_message_iter_get_uint32(self.iter)

    def get_double(self):
        return dbus_message_iter_get_double(self.iter)

    def get_string(self):
        return dbus_message_iter_get_string(self.iter)

    def get_dict_key(self):
        return dbus_message_iter_get_dict_key(self.iter)

    # FIXME: implement dbus_message_iter_get_named
    #                  dbus_message_iter_init_array_iterator
    
    def get_byte_array(self):
        cdef int len
        cdef unsigned char *retval
        dbus_message_iter_get_byte_array(self.iter, &retval, <int*>&len)
        list = []
        for i from 0 <= i < len:
            list.append(chr(retval[i]))
        return list

    # FIXME: implement dbus_message_iter_get_boolean_array
    #                  dbus_message_iter_get_int32_array
    #                  dbus_message_iter_get_uint32_array
    #                  dbus_message_iter_get_double_array

    def get_string_array(self):
        cdef int len
        cdef char **retval
        
        dbus_message_iter_get_string_array(self.iter, &retval, <int*>&len)
        list = []
        for i from 0 <= i < len:
            list.append(retval[i])
        return list

    # dbus_message_append_iter_init included in class Message

    #FIXME: handle all the different types?
    def append(self, value):
        value_type = type(value)

        if value_type == bool:
            retval = self.append_boolean(value)
        elif value_type == int:
            retval = self.append_int32(value)
        elif value_type == float:
            retval = self.append_double(value)
        elif value_type == str:
            retval = self.append_string(value)
        elif value_type == list:
            if (len(list) == 1):
                raise TypeError, "Empty list"
            list_type = type(list[0])
            if list_type == str:
                self.append_string_array(list)
            else:
                raise TypeError, "List of unknown type '%s'" % (list_type)
        else:
            raise TypeError, "Argument of unknown type '%s'" % (value_type)

        return retval

    def append_nil(self):
        return dbus_message_iter_append_nil(self.iter)
    
    def append_boolean(self, value):
        return dbus_message_iter_append_boolean(self.iter, value)

    def append_byte(self, value):
        return dbus_message_iter_append_byte(self.iter, value)
    
    def append_int32(self, value):
        return dbus_message_iter_append_int32(self.iter, value)

    def append_uint32(self, value):
        return dbus_message_iter_append_uint32(self.iter, value)

    def append_double(self, value):
        return dbus_message_iter_append_double(self.iter, value)

    def append_string(self, value):
        return dbus_message_iter_append_string(self.iter, value)    

    # FIXME: dbus_message_iter_append_named

    def append_dict_key(self, value):
        return dbus_message_iter_append_dict_key(self.iter, value)

    # FIXME: append_array, append_dict_array, append_boolean_array, append_int32_array, append_uint32_array, append_double_array

    def append_byte_array(self, list):
        cdef unsigned char * value
        cdef int length
        length = len(list)
        value = <unsigned char*>malloc(length)
        for i from 0 <= i < length:
            item = list[i]
            if type(item) != str or len(item) != 1:
                raise TypeError
            value[i] = ord(item)
        return dbus_message_iter_append_byte_array(self.iter, value, length)
    
    def append_string_array(self, list):
        cdef char **value
        cdef int length
        length = len(list)
        value = <char**>malloc(length)
        for i from 0 <= i < length:
            item = list[i]
            if type(item) != str:
                raise TypeError
            value[i] = item
        return dbus_message_iter_append_string_array(self.iter, value, length)

    
(MESSAGE_TYPE_INVALID, MESSAGE_TYPE_METHOD_CALL, MESSAGE_TYPE_METHOD_RETURN, MESSAGE_TYPE_ERROR, MESSAGE_TYPE_SIGNAL) = range(5)
(TYPE_INVALID, TYPE_NIL, TYPE_BYTE, TYPE_BOOLEAN, TYPE_INT32, TYPE_UINT32, TYPE_INT64, TYPE_UINT64, TYPE_DOUBLE, TYPE_STRING, TYPE_NAMED, TYPE_ARRAY, TYPE_DICT, TYPE_OBJECT_PATH) = range(14)
    
cdef class Message:
    cdef DBusMessage *msg

    def __init__(self, message_type=MESSAGE_TYPE_INVALID,
                 service=None, path=None, interface=None, method=None,
                 method_call=None,
                 name=None,
                 reply_to=None, error_name=None, error_message=None,
                 _create=1):
        cdef char *cservice
        if (service == None):
            cservice = NULL
        else:
            cservice = service
            
        if not _create:
            return

        if message_type == MESSAGE_TYPE_METHOD_CALL:
            self.msg = dbus_message_new_method_call(cservice, path, interface, method)
        elif message_type == MESSAGE_TYPE_METHOD_RETURN:
            cmsg = method_call._get_msg()
            self.msg = dbus_message_new_method_return(<DBusMessage*>cmsg)
        elif message_type == MESSAGE_TYPE_SIGNAL:
            self.msg = dbus_message_new_signal(path, interface, name)
        elif message_type == MESSAGE_TYPE_ERROR:
            cmsg = reply_to._get_msg()
            self.msg = dbus_message_new_error(<DBusMessage*>cmsg, error_name, error_message)
            
    def type_to_name(self, type):
        if type == MESSAGE_TYPE_SIGNAL:
            return "signal"
        elif type == MESSAGE_TYPE_METHOD_CALL:
            return "method call"
        elif type == MESSAGE_TYPE_METHOD_RETURN:
            return "method return"
        elif type == MESSAGE_TYPE_ERROR:
            return "error"
        else:
            return "(unknown message type)"
        
    def __str__(self):
        message_type = self.get_type()
        sender = self.get_sender()

        if sender == None:
            sender = "(no sender)"

        if (message_type == MESSAGE_TYPE_METHOD_CALL) or (message_type == MESSAGE_TYPE_SIGNAL):
            retval = '%s interface=%s; member=%s; sender=%s' % (self.type_to_name(message_type),
                                                                self.get_interface(),
                                                                self.get_member(),
                                                                sender)
        elif message_type == MESSAGE_TYPE_METHOD_RETURN:
            retval = '%s sender=%s' % (self.type_to_name(message_type),
                                        sender)
        elif message_type == MESSAGE_TYPE_ERROR:
            retval = '%s name=%s; sender=%s' % (self.type_to_name(message_type),
                                                self.get_error_name(),
                                                sender)
        else:
            retval = "Message of unknown type %d" % (message_type)


        # FIXME: should really use self.convert_to_tuple() here
        
        iter = self.get_iter()
        value_at_iter = True
        
        while (value_at_iter):
            type = iter.get_arg_type()

            if type == TYPE_INVALID:
                break
            elif type == TYPE_STRING:
                str = iter.get_string()
                arg = 'string:%s\n' % (str)
            elif type == TYPE_INT32:
                num = iter.get_int32()
                arg = 'int32:%d\n' % (num)
            elif type == TYPE_UINT32:
                num = iter.get_uint32()
                arg = 'uint32:%u\n' % (num)
            elif type == TYPE_DOUBLE:
                num = iter.get_double()
                arg = 'double:%f\n' % (num)
            elif type == TYPE_BYTE:
                num = iter.get_byte()
                arg = 'byte:%d\n' % (num)
            elif type == TYPE_BOOLEAN:
                bool = iter.get_boolean()
                if (bool):
                    str = "true"
                else:
                    str = "false"
                arg = 'boolean:%s\n' % (str)
            else:
                arg = '(unknown arg type %d)\n' % type

            retval = retval + arg
            value_at_iter = iter.next()

        return retval
    
    def _set_msg(self, msg):
        self.msg = <DBusMessage*>msg

    def _get_msg(self):
        return <object>self.msg

    def get_iter(self):
        return MessageIter(self)

    def get_args_list(self):
        retval = [ ]

        iter = self.get_iter()
        try:
            retval.append(iter.get())
        except TypeError, e:
            return [ ]
            
        value_at_iter = iter.next()
        while (value_at_iter):
            retval.append(iter.get())
            value_at_iter = iter.next()        

        return retval
            
    # FIXME: implement dbus_message_copy?

    def get_type(self):
        return dbus_message_get_type(self.msg)

    def set_path(self, object_path):
        return dbus_message_set_path(self.msg, object_path)
    
    def get_path(self):
        return dbus_message_get_path(self.msg)
    
    def set_interface(self, interface):
        return dbus_message_set_interface(self.msg, interface)

    def get_interface(self):
        return dbus_message_get_interface(self.msg)    

    def set_member(self, member):
        return dbus_message_set_member(self.msg, member)

    def get_member(self):
        return dbus_message_get_member(self.msg)

    def set_error_name(self, name):
        return dbus_message_set_error_name(self.msg, name)

    def get_error_name(self):
        return dbus_message_get_error_name(self.msg)

    def set_destination(self, destination):
        return dbus_message_set_destination(self.msg, destination)

    def get_destination(self):
        return dbus_message_get_destination(self.msg)

    def set_sender(self, sender):
        return dbus_message_set_sender(self.msg, sender)
    
    def get_sender(self):
        cdef char *sender
        sender = dbus_message_get_sender(self.msg)
        if (sender == NULL):
            return None
        else:
            return sender

    def set_no_reply(self, no_reply):
        dbus_message_set_no_reply(self.msg, no_reply)

    def get_no_reply(self):
        return dbus_message_get_no_reply(self.msg)

    def is_method_call(self, interface, method):
        return dbus_message_is_method_call(self.msg, interface, method)

    def is_signal(self, interface, signal_name):
        return dbus_message_is_signal(self.msg, interface, signal_name)

    def is_error(self, error_name):
        return dbus_message_is_error(self.msg, error_name)

    def has_destination(self, service):
        return dbus_message_has_destination(self.msg, service)

    def has_sender(self, service):
        return dbus_message_has_sender(self.msg, service)

    def get_serial(self):
        return dbus_message_get_serial(self.msg)

    def set_reply_serial(self, reply_serial):
        return dbus_message_set_reply_serial(self.msg, reply_serial)

    def get_reply_serial(self):
        return dbus_message_get_reply_serial(self.msg)    

    #FIXME: dbus_message_get_path_decomposed
    
    # FIXME: all the different dbus_message_*args* methods

class Signal(Message):
    def __init__(self, spath, sinterface, sname):
        Message.__init__(self, MESSAGE_TYPE_SIGNAL, path=spath, interface=sinterface, name=sname)

class MethodCall(Message):
    def __init__(self, mpath, minterface, mmethod):
        Message.__init__(self, MESSAGE_TYPE_METHOD_CALL, path=mpath, interface=minterface, method=mmethod)

class MethodReturn(Message):
    def __init__(self, method_call):
        Message.__init__(self, MESSAGE_TYPE_METHOD_RETURN, method_call=method_call)

class Error(Message):
    def __init__(self, reply_to, error_name, error_message):
        Message.__init__(self, MESSAGE_TYPE_ERROR, reply_to=reply_to, error_name=error_name, error_message=error_message)
        
cdef class Server:
    cdef DBusServer *server
    def __init__(self, address):
        cdef DBusError error
        dbus_error_init(&error)
        self.server = dbus_server_listen(address,
                                         &error)
        if dbus_error_is_set(&error):
            raise DBusException, error.message

    def setup_with_g_main (self):
        dbus_server_setup_with_g_main(self.server, NULL)

    def disconnect(self):
        dbus_server_disconnect(self.server)

    def get_is_connected(self):
        return dbus_server_get_is_connected(self.server)

#    def set_new_connection_function(self, function, data):
#        dbus_server_set_new_connection_function(self.conn, function,
#                                                data, NULL)
        
#    def set_watch_functions(self, add_function, remove_function, data):
#        dbus_server_set_watch_functions(self.server,
#                                        add_function, remove_function,
#                                        data, NULL)
        
#    def set_timeout_functions(self, add_function, remove_function, data):
#        dbus_server_set_timeout_functions(self.server,
#                                          add_function, remove_function,
#                                          data, NULL)
        
#    def handle_watch(self, watch, condition):
#        dbus_server_handle_watch(self.conn, watch, condition)

BUS_SESSION = DBUS_BUS_SESSION
BUS_SYSTEM = DBUS_BUS_SYSTEM
BUS_ACTIVATION = DBUS_BUS_ACTIVATION

def bus_get (bus_type):
    cdef DBusError error
    dbus_error_init(&error)
    cdef DBusConnection *connection

    connection = dbus_bus_get(bus_type,
                              &error)

    if dbus_error_is_set(&error):
        raise DBusException, error.message

    return Connection(_conn=<object>connection)

def bus_get_base_service(connection):
    conn = connection._get_conn()
    return dbus_bus_get_base_service(<DBusConnection*>conn)

def bus_register(connection):
    cdef DBusError error
    dbus_error_init(&error)
    cdef dbus_bool_t retval

    conn = connection._get_conn()
    retval = dbus_bus_register(<DBusConnection*>conn,
                               &error)
    if dbus_error_is_set(&error):
        raise DBusException, error.message

    return retval

SERVICE_FLAG_PROHIBIT_REPLACEMENT = 0x1
SERVICE_FLAG_REPLACE_EXISTING     = 0x2

def bus_acquire_service(connection, service_name, flags=0):
    cdef DBusError error
    dbus_error_init(&error)
    cdef int retval

    conn = connection._get_conn()
    retval = dbus_bus_acquire_service(<DBusConnection*>conn,
                                      service_name,
                                      flags,
                                      &error)
    if dbus_error_is_set(&error):
        raise DBusException, error.message
    return retval
    
def bus_service_exists(connection, service_name):
    cdef DBusError error
    dbus_error_init(&error)
    cdef dbus_bool_t retval

    conn = connection._get_conn()
    retval = dbus_bus_service_exists(<DBusConnection*>conn,
                                     service_name,
                                     &error)
    if dbus_error_is_set(&error):
        raise DBusException, error.message
    return retval