Package: libgtk2-ruby1.8 Version: 0.19.3-2 Severity: normal The following program:
----------------------------------------
#!/usr/bin/ruby
require 'gtk2'
@window = Gtk::Window.new('Bogosity')
@window.set_default_size(320, 240)
@window.show
def count() i = 0; loop { sleep 1; i += 1 } end
@thread = Thread.new { count() }
Gtk.main
----------------------------------------
does not properly block when no GTK+ input events are being received
and the other thread is sleeping. It generates strace output (with
strace -etrace=\!rt_sigprocmask) along the lines of the attached file;
observe the repeated flips between select() and poll(), all with zero
timeouts.
Commenting out the @thread creation causes the GTK+ main loop to block
(according to interactive strace) when no input events are coming to
the window, and commenting out the Gtk.main and replacing it with <<
sleep 0.5; count() >> causes the Ruby threading engine to block when
both threads are sleeping. Mixing the two causes a furious explosion
of system calls.
---> Drake Wilson
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.29-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libgtk2-ruby1.8 depends on:
ii libatk1-ruby1.8 0.19.3-2 ATK bindings for the Ruby language
ii libatk1.0-0 1.30.0-1 The ATK accessibility toolkit
ii libc6 2.10.2-7 Embedded GNU C Library: Shared lib
ii libcairo2 1.8.8-2 The Cairo 2D vector graphics libra
ii libfontconfig1 2.8.0-2.1 generic font configuration library
ii libfreetype6 2.3.11-1 FreeType 2 font engine, shared lib
ii libgdk-pixbuf2-ruby1.8 0.19.3-2 Gdk-Pixbuf 2 bindings for the Ruby
ii libglib2.0-0 2.24.0-1 The GLib library of C routines
ii libgtk2.0-0 2.20.0-3 The GTK+ graphical user interface
ii libpango1-ruby1.8 0.19.3-2 Pango bindings for the Ruby langua
ii libpango1.0-0 1.26.2-1 Layout and rendering of internatio
ii libruby1.8 1.8.7.249-2 Libraries necessary to run Ruby 1.
libgtk2-ruby1.8 recommends no packages.
libgtk2-ruby1.8 suggests no packages.
-- no debconf information
dpw-20100517-gtk-spin-1.strace.gz
Description: GNU Zip compressed data
