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��R���IEND�B` # -*- coding: utf-8 -*- # slip.dbus.mainloop -- mainloop wrappers # # Copyright © 2009, 2012 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # Authors: # Nils Philippsen """This module contains mainloop wrappers. Currently only glib main loops are supported.""" __all__ = ("MainLoop", "set_type") class MainLoop(object): """An abstract main loop wrapper class and factory. Use MainLoop() to get a main loop wrapper object for a main loop type previously registered with set_type(). Defaults to glib main loops. Actual main loop wrapper classes are derived from this class.""" __mainloop_class = None def __new__(cls, *args, **kwargs): global _mainloop_class if MainLoop._mainloop_class is None: MainLoop.set_type("glib") return super(MainLoop, cls).__new__(MainLoop.__mainloop_class, *args, **kwargs) @classmethod def set_type(cls, mltype): """Set a main loop type for non-blocking interfaces. mltype: "glib" (currently only glib main loops are supported)""" if MainLoop.__mainloop_class is not None: raise RuntimeError("The main loop type can only be set once.") ml_type_class = {"glib": GlibMainLoop} if mltype in ml_type_class: MainLoop.__mainloop_class = ml_type_class[mltype] else: raise ValueError("'%s' is not one of the valid main loop types (%s)." % (mltype, ",".join(ml_type_class.keys()))) def pending(self): """Returns if there are pending events.""" raise NotImplementedError() def iterate(self): """Iterates over one pending event.""" raise NotImplementedError() def iterate_over_pending_events(self): """Iterates over all pending events.""" while self.pending(): self.iterate() def run(self): """Runs the main loop.""" raise NotImplementedError() def quit(self): """Quits the main loop.""" raise NotImplementedError() class GlibMainLoop(MainLoop): def __init__(self): from slip._wrappers import _gobject ml = _gobject.MainLoop() ctx = ml.get_context() self._mainloop = ml self.pending = ctx.pending self.iterate = ctx.iteration self.run = ml.run self.quit = ml.quit def set_type(mltype): """Set a main loop type for non-blocking interfaces. mltype: "glib" (currently only glib main loops are supported) Deprecated, use MainLoop.set_type() instead.""" from warnings import warn warn("use MainLoop.set_type() instead", DeprecationWarning) MainLoop.set_type(mltype)