Attachment 161822 Details for Bug 306964

Sample program to reproduce the hang

deadlock.py (text/x-python), 1.68 KB, created by Charles Coffing on 2007-09-04 22:50:13 UTC

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Creator: Charles Coffing

Created: 2007-09-04 22:50:13 UTC

Size: 1.68 KB

patch

obsolete

>#!/usr/bin/env python
>#
># bugzilla #306964
>#
># Thread emits a signal; signal handler destroys window.
># Works from main thread, but seems to deadlock from other threads.
># Worked in SLES 10
># Broken in 10.3
>
>import threading
>import gtk
>import gobject
>
>class Deadlock(gobject.GObject):
>    __gsignals__ = { 'helper': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ()) }
>
>    def destroy_handler(self, widget, data=None):
>        print "destroying from %s" % threading.currentThread()
>        self.window.destroy()
>        print "destroyed"
>
>    def clicked2(self, widget, data=None):
>        print "starting new thread, from %s" % threading.currentThread()
>        t=threading.Thread(target=self.thread2)
>        t.start()
>
>    def thread2(self):
>        gtk.gdk.threads_enter()
>        print "emitting destroy signal from %s" % threading.currentThread()
>        self.emit('helper')
>        print "emitted"
>        gtk.gdk.threads_leave()
>
>    def __init__(self):
>        self.__gobject_init__()
>        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
>    
>        vbox = gtk.VBox()
>        self.button1 = gtk.Button("destroy() from thread 1")
>        self.button1.connect("clicked", self.destroy_handler, None)
>        vbox.add(self.button1)
>
>        self.button2 = gtk.Button("destroy() from thread 2")
>        self.button2.connect("clicked", self.clicked2, None)
>        self.connect("helper", self.destroy_handler, None)
>        vbox.add(self.button2)
>    
>        self.window.add(vbox)
>        self.window.show_all()
>        print "main thread %s" % threading.currentThread()
>
>    def main(self):
>        gtk.gdk.threads_init()
>        gtk.main()
>
>if __name__ == "__main__":
>    deadlock = Deadlock()
>    deadlock.main()

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Attachments on bug 306964: 161822 | 162104 | 162118