Python example demonstrating when callbacks are run in a threaded environment

emit.py

#!/usr/bin/env python
# Python example demonstrating when callbacks are run in a threaded environment
# John Stowers

import threading
import thread
import time
import gobject
import gtk

gtk.gdk.threads_init()

class Test(threading.Thread, gobject.GObject):
    __gsignals__ = { 
        "now" : (gobject.SIGNAL_RUN_FIRST, None, (str,str)),
        "idle" : (gobject.SIGNAL_RUN_FIRST, None, (str,str))
    }

    def __init__(self):
        threading.Thread.__init__(self)
        gobject.GObject.__init__(self)

    def run(self):
        print "run"
        while 1:
            self.emit("now", "now", str(thread.get_ident()))
            gobject.idle_add(self.emit, "idle", "idle", str(thread.get_ident()))
            time.sleep(1)

def cb(sender, how, i):
    print "%s cb %s vs thread %s" % (how, thread.get_ident(), i)

def tick():
    print "ml %s ..." % thread.get_ident()
    return True

gobject.timeout_add_seconds(1, tick)

t = Test()
t.connect("now", cb)
t.connect("idle", cb)
t.start()

gtk.main()