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dix: add callback before ClientRec is being destroyed

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Existing client-state hook isn't sufficient for this, and so easy to
be extended cleanly (*1). Adding a new callback is trivial and cheap,
so preferring this way, instead of trying to tweak the existing hook
for something it's never been designed for.

*1) see discussion here: https://github.com/X11Libre/xserver/pull/1077

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2025-09-18 18:31:16 +02:00 committed by Enrico Weigelt
parent 4486a554f8
commit 9856372932
5 changed files with 32 additions and 2 deletions
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11
dix/client.c Normal file
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@ -0,0 +1,11 @@
/* SPDX-License-Identifier: MIT OR X11
*
* Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
*/
#include <dix-config.h>
#include <stddef.h>
#include "include/callback.h"
CallbackListPtr ClientDestroyCallback = NULL;

16
dix/client_priv.h Normal file
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@ -0,0 +1,16 @@
/* SPDX-License-Identifier: MIT OR X11
*
* Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
*/
#ifndef _XSERVER_DIX_CLIENT_PRIV_H
#define _XSERVER_DIX_CLIENT_PRIV_H
#include "include/callback.h"
/*
* called right before ClientRec is about to be destroyed,
* after resources have been freed. argument is ClientPtr
*/
extern CallbackListPtr ClientDestroyCallback;
#endif /* _XSERVER_DIX_CLIENT_PRIV_H */

2
dix/dispatch.c
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@ -103,6 +103,7 @@ Equipment Corporation.
#include <X11/fonts/fontstruct.h>
#include <X11/fonts/libxfont2.h>
#include "dix/client_priv.h"
#include "dix/colormap_priv.h"
#include "dix/cursor_priv.h"
#include "dix/dix_priv.h"
@ -3550,6 +3551,7 @@ CloseDownClient(ClientPtr client)
TouchListenerGone(client->clientAsMask);
GestureListenerGone(client->clientAsMask);
FreeClientResources(client);
CallCallbacks(&ClientDestroyCallback, client);
/* Disable client ID tracking. This must be done after
* ClientStateCallback. */
ReleaseClientIds(client);

1
dix/meson.build
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@ -1,5 +1,6 @@
srcs_dix = [
'atom.c',
'client.c',
'colormap.c',
'color.c',
'cursor.c',

4
os/client_priv.h
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@ -3,8 +3,8 @@
* Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
* Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies).
*/
#ifndef _XSERVER_DIX_CLIENT_PRIV_H
#define _XSERVER_DIX_CLIENT_PRIV_H
#ifndef _XSERVER_OS_CLIENT_PRIV_H
#define _XSERVER_OS_CLIENT_PRIV_H
#include <sys/types.h>
#include <X11/Xdefs.h>