gtk2-perl-bugs

[Gtk2-perl-bugs] [Bug 711839] New: Add Glib::MainContext::invoke() wrapper

[gnome-perl (bugzilla.gnome.o. <bug...@gn...>]

https://bugzilla.gnome.org/show_bug.cgi?id=711839
  gnome-perl | Glib | unspecified

           Summary: Add Glib::MainContext::invoke() wrapper
    Classification: Bindings
           Product: gnome-perl
           Version: unspecified
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Glib
        AssignedTo: gtk...@li...
        ReportedBy: eb...@gm...
         QAContact: gtk...@li...
     GNOME version: ---


We should have this in the bindings. See the commit log for more information.

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[Gtk2-perl-bugs] [Bug 711839] Add Glib::MainContext::invoke() wrapper

[gnome-perl (bugzilla.gnome.o. <bug...@gn...>]

https://bugzilla.gnome.org/show_bug.cgi?id=711839
  gnome-perl | Glib | unspecified

--- Comment #1 from Emmanuele Bassi (:ebassi) <eb...@gm...> 2013-11-11 12:56:22 UTC ---
Created an attachment (id=259554)
 View: https://bugzilla.gnome.org/attachment.cgi?id=259554
 Review: https://bugzilla.gnome.org/review?bug=711839&attachment=259554

Add Glib::MainContext::invoke() wrapper

Modern GLib is trying to phase out GMainLoop in favour of GMainContext,
especially when it comes to threads usage.

The invoke() method of GMainContext is used in two cases:

  • if the code is using (native) threads with multiple main contexts
    and wishes to invoke a callback function in the correct context,
    which is the case with GIO
  • if the code is using an API that explicitly breaks when used from
    multiple threads, and requires that each callback is invoked a
    specific main context, which is the case of GTK+

The usual way to perform this operation before the introduction of the
g_main_context_invoke() function was to schedule an idle source; this
requires setting up idle sources for specific contexts (thus foregoing
all the convenience API).

Given that the documentation for the libraries based on GLib is starting
to point in the direction of g_main_context_invoke(), the Perl bindins
should provide a wrapper for this function.

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[Gtk2-perl-bugs] [Bug 711839] Add Glib::MainContext::invoke() wrapper

[gnome-perl (bugzilla.gnome.o. <bug...@gn...>]

https://bugzilla.gnome.org/show_bug.cgi?id=711839
  gnome-perl | Glib | unspecified

Torsten Schoenfeld <kaffeetisch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kaf...@gm...

--- Comment #2 from Torsten Schoenfeld <kaf...@gm...> 2013-12-08 17:31:00 UTC ---
The patch looks good to me (apart from some minor spaces-vs-tabs issues), but
it needs some unit tests.

Also, as far as I can see, this would suffer from the same kinds of problems
that the Glib::Idle approach has when used by Perl code running in different
threads: If you call $context->invoke() from some thread on a context not
attached to that thread, then gperl_main_context_invoke_callback() will access
SV* pointers from the calling thread in the context's thread, i.e. it will try
to use SV* pointers belonging to one Perl interpreter instance with another
Perl interpreter instance.  This is unreliable.  This is not an argument
against the patch, however.

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[Gtk2-perl-bugs] [Bug 711839] Add Glib::MainContext::invoke() wrapper

[gnome-perl (G. B. <bug...@gn...>]

https://bugzilla.gnome.org/show_bug.cgi?id=711839

Shae Johnson <DSh...@gm...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |DSh...@gm...

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[Gtk2-perl-bugs] [Bug 711839] Add Glib::MainContext::invoke() wrapper

[gnome-perl (G. B. <bug...@gn...>]

https://bugzilla.gnome.org/show_bug.cgi?id=711839

GNOME Infrastructure Team <gno...@gn...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |gno...@gn...
         Resolution|---                         |OBSOLETE

--- Comment #3 from GNOME Infrastructure Team <gno...@gn...> ---
GNOME is going to shut down bugzilla.gnome.org in favor of gitlab.gnome.org.
As part of that, we are mass-closing older open tickets in bugzilla.gnome.org
which have not seen updates for a longer time (resources are unfortunately
quite limited so not every ticket can get handled).

If you can still reproduce the situation described in this ticket in a recent
and supported software version, then please follow
  https://wiki.gnome.org/GettingInTouch/BugReportingGuidelines
and create a new ticket at
  https://gitlab.gnome.org/GNOME?utf8=%E2%9C%93&filter=perl-

Thank you for your understanding and your help.

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