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Today's Topics:
1. [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem (gnomemm (bugzilla.gnome.org))
2. [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem (gnomemm (bugzilla.gnome.org))
3. [Bug 559374] New: get_items_at shouldn't be const
(gnomemm (bugzilla.gnome.org))
4. [Bug 559374] get_items_at shouldn't be const
(gnomemm (bugzilla.gnome.org))
5. [Bug 559374] get_items_at shouldn't be const
(gnomemm (bugzilla.gnome.org))
6. [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem (gnomemm (bugzilla.gnome.org))
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Nov 2008 04:28:30 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=utf-8
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http://bugzilla.gnome.org/show_bug.cgi?id=559209
gnomemm | gstreamermm | Ver: unspecified
Jos? Alburquerque changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[EMAIL PROTECTED]
------- Comment #4 from Jos? Alburquerque 2008-11-05 04:28 UTC -------
(In reply to comment #3)
> The function is incredibly simple:
>
> GstElementFactory *
> gst_element_get_factory (GstElement * element)
> {
> g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
>
> return GST_ELEMENT_GET_CLASS (element)->elementfactory;
> }
>
> It does no referencing, so we must take a reference when creating a RefPtr
> from
> its result. We then release that refernce in the RefPtr destructor. I don't
> see
> how any different refcounting could happen the first or second time that this
> function is called.
Exactly. There is no problem with how get_factory() is written. What you're
seeing is probably a side effect of the floating reference functionality of
GstObject (see Description section of GstObject[1]). We've opted not to
include this in gstreamermm at this point because we have automatic
referencing, but it's tricky thus the side effect. Could you please try with
the following checked in change?
2008-11-04 Jos? Alburquerque <[EMAIL PROTECTED]>
* gstreamer/gstreamermm/object.cc: Fix the floating reference aversion
code so that it checks that the GstObject is floating before
referencing it and then sinking it.
Also, please try to create attachments in the report; they're easier to use.
Thanks.
[1]
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html
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------------------------------
Message: 2
Date: Wed, 5 Nov 2008 04:44:07 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=utf-8
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gnomemm | gstreamermm | Ver: unspecified
------- Comment #5 from RichardF 2008-11-05 04:44 UTC -------
Jos?, as it turns out I just came to the same conclusion as you about the use
of gst_object_ref() and gst_object_sink() in the Gst::Object constructor, and
made the same change as your patch - albeit with a G_LIKELY around the
GST_OBJECT_IS_FLOATING, as I guessed that is the most common case ;) - and was
about to add the details to this bug report when I saw your post. :)
Your change (along with Murray's previous change) works as desired, and the
test code I posted above now results in the underlying GstElementFactory only
having the required one remaining reference after all the RefPtrs have
destructed.
Thanks for your prompt attention to this problem.
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------------------------------
Message: 3
Date: Wed, 5 Nov 2008 04:50:19 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559374] New: get_items_at shouldn't be
const
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]/>
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gnomemm | goocanvasmm | Ver: unspecified
Summary: get_items_at shouldn't be const
Product: gnomemm
Version: unspecified
Platform: Other
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: goocanvasmm
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
GNOME version: Unspecified
GNOME milestone: Unspecified
I try to create a new item implementing the interface Goocanvas::Item, but I
can't find how to override get_items_at_vfunc correctly. When I try to add the
current object (this) to the list of found items, the compiler complains about
an invalid cast from "Goocanvas::Item* const" to "Goocanvas::Item*".
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------------------------------
Message: 4
Date: Wed, 5 Nov 2008 04:51:39 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559374] get_items_at shouldn't be const
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
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gnomemm | goocanvasmm | Ver: unspecified
------- Comment #1 from Louis-Francis Ratt?-Boulianne 2008-11-05 04:51 UTC
-------
Created an attachment (id=121990)
--> (http://bugzilla.gnome.org/attachment.cgi?id=121990&action=view)
Test code
You can compile with :
g++ item.cpp -o item `pkg-config gtkmm-2.4 goocanvasmm-1.0 --cflags --libs`
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------------------------------
Message: 5
Date: Wed, 5 Nov 2008 04:52:02 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559374] get_items_at shouldn't be const
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
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gnomemm | goocanvasmm | Ver: unspecified
------- Comment #2 from Louis-Francis Ratt?-Boulianne 2008-11-05 04:52 UTC
-------
Created an attachment (id=121991)
--> (http://bugzilla.gnome.org/attachment.cgi?id=121991&action=view)
Header file for test code
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------------------------------
Message: 6
Date: Wed, 5 Nov 2008 04:58:49 +0000 (UTC)
From: "gnomemm (bugzilla.gnome.org)"
<[EMAIL PROTECTED]>
Subject: [gtkmm bugzilla] [Bug 559209] Gst::Element::get_factory() -
Gst::ElementFactory refcount problem
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=utf-8
If you have any questions why you received this email, please see the text at
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gnomemm | gstreamermm | Ver: unspecified
------- Comment #6 from Jos? Alburquerque 2008-11-05 04:58 UTC -------
(In reply to comment #5)
> Jos?, as it turns out I just came to the same conclusion as you about the use
> of gst_object_ref() and gst_object_sink() in the Gst::Object constructor, and
> made the same change as your patch - albeit with a G_LIKELY around the
> GST_OBJECT_IS_FLOATING, as I guessed that is the most common case ;) - and was
> about to add the details to this bug report when I saw your post. :)
I've done the same but will not check it in until a little later with some
other things I'm working on. Thanks for the report.
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