6fc6b8b4e8
This should help with diagnosing crashes caused by over-eager XID reuse in Xlib, see bug 581526.
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gdkx.h"
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#include "gdkprivate-x11.h"
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#include "gdkdisplay-x11.h"
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#include "gdkalias.h"
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#include <stdio.h>
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static guint gdk_xid_hash (XID *xid);
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static gboolean gdk_xid_equal (XID *a,
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XID *b);
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/* The 3 high bits of XIDs are unused. We use one to mark fonts,
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* since we must be able to skip fonts when iterating over all XIDs.
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*/
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#define XID_FONT_BIT (1<<31)
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void
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_gdk_xid_table_insert (GdkDisplay *display,
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XID *xid,
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gpointer data)
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{
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GdkDisplayX11 *display_x11;
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g_return_if_fail (xid != NULL);
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g_return_if_fail (GDK_IS_DISPLAY (display));
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display_x11 = GDK_DISPLAY_X11 (display);
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if (!display_x11->xid_ht)
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display_x11->xid_ht = g_hash_table_new ((GHashFunc) gdk_xid_hash,
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(GEqualFunc) gdk_xid_equal);
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if (g_hash_table_lookup (display_x11->xid_ht, xid))
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g_warning ("XID collision, trouble ahead");
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g_hash_table_insert (display_x11->xid_ht, xid, data);
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}
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void
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_gdk_xid_table_remove (GdkDisplay *display,
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XID xid)
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{
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GdkDisplayX11 *display_x11;
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g_return_if_fail (GDK_IS_DISPLAY (display));
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display_x11 = GDK_DISPLAY_X11 (display);
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if (display_x11->xid_ht)
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g_hash_table_remove (display_x11->xid_ht, &xid);
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}
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/**
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* gdk_xid_table_lookup_for_display:
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* @display: the #GdkDisplay.
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* @xid: an X id.
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*
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* Returns the GDK object associated with the given X id.
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*
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* Returns: a GDK object associated with the given X id.
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*
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* Since: 2.2
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*/
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gpointer
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gdk_xid_table_lookup_for_display (GdkDisplay *display,
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XID xid)
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{
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GdkDisplayX11 *display_x11;
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gpointer data = NULL;
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g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
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display_x11 = GDK_DISPLAY_X11 (display);
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if (display_x11->xid_ht)
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data = g_hash_table_lookup (display_x11->xid_ht, &xid);
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return data;
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}
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/**
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* gdk_xid_table_lookup:
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* @xid: an X id.
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*
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* Returns the Gdk object associated with the given X id.
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*
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* Return value: the associated Gdk object, which may be a #GdkPixmap,
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* a #GdkWindow or a #GdkFont.
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**/
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gpointer
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gdk_xid_table_lookup (XID xid)
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{
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return gdk_xid_table_lookup_for_display (gdk_display_get_default (), xid);
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}
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static guint
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gdk_xid_hash (XID *xid)
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{
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return *xid;
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}
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static gboolean
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gdk_xid_equal (XID *a,
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XID *b)
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{
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return ((*a & ~XID_FONT_BIT) == (*b & ~XID_FONT_BIT));
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}
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#define __GDK_XID_C__
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#include "gdkaliasdef.c"
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