Your message dated Fri, 2 Sep 2005 09:37:53 -0700
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has caused the Debian Bug report #326221,
regarding libsigc++-2.0: Unable to disconnect parentless slots
to be marked as having been forwarded to the upstream software
author(s) libsigc-list@gnome.org, [EMAIL PROTECTED]
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From: Daniel Burrows <[EMAIL PROTECTED]>
To: libsigc-list@gnome.org, [EMAIL PROTECTED]
Subject: Invalidating parentless slots
Date: Fri, 2 Sep 2005 09:37:53 -0700
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I got the attached message and (reversed) patch in the Debian BTS.
Daniel
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Content-Description: Bas Wijnen <[EMAIL PROTECTED]>: Bug#326221: libsigc++-2.0:
Unable to disconnect parentless slots
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Subject: Bug#326221: libsigc++-2.0: Unable to disconnect parentless slots
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From: Bas Wijnen <[EMAIL PROTECTED]>
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Package: libsigc++-2.0
Severity: normal
Tags: patch
sigc::slot can be used as a function pointer with the advantage of being
able to add function arguments with sigc::bind, etc. However,
disconnecting such slots does not work, because it doesn't do anything
if there is no parent to notify.
In my programs it is quite usual that there isn't a parent, because I
know what happens to the slot, so I don't need a notification. However,
I still need to invalidate the slot sometimes, and even
slot = sigc::slot0 <void> ();
doesn't work, because that simply calls disconnect ().
The attached patch invalidates the slot on disconnect, even if there is
no parent.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.11
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
--===============1255800447==
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Content-Disposition: attachment; filename="sigc.patch"
--- slot_base.cc 2005-09-02 15:39:48.000000000 +0200
+++ libsigc++-2.0.10/sigc++/functors/slot_base.cc 2005-02-11
11:59:07.000000000 +0100
@@ -40,11 +40,11 @@ void slot_rep::operator delete(void* p)
void slot_rep::disconnect()
{
- call_ = 0; // Invalidate the slot.
- // _Must_ be done here because parent_ might defer the
actual
- // destruction of the slot_rep and try to invoke it
before that point.
if (parent_)
{
+ call_ = 0; // Invalidate the slot.
+ // _Must_ be done here because parent_ might defer the
actual
+ // destruction of the slot_rep and try to invoke it
before that point.
void* data_ = parent_;
parent_ = 0; // Just a precaution.
(cleanup_)(data_); // Notify the parent (might lead to destruction of
this!).
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From: Bas Wijnen <[EMAIL PROTECTED]>
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I just noticed the patch is reversed, so you need -R to apply it. Sorry ab=
out
that.
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