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/*
* AT-SPI - Assistive Technology Service Provider Interface
* (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
*
* Copyright 2001, 2002 Sun Microsystems Inc.,
* Copyright 2001, 2002 Ximian, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glib.h>
#include "reentrant-list.h"
typedef struct {
GList **list;
GList *iterator;
} Iteration;
static GSList *working_list = NULL; /* of Iteration */
/*
* deletes an element from the list - in a re-entrant
* safe fashion; advances the element pointer to the next
* element.
*/
void
spi_re_entrant_list_delete_link (GList * const *element_ptr)
{
GSList *l;
GList *next;
GList *element;
gboolean first_item;
GList *dummy; /* suppress warning */
g_return_if_fail (element_ptr != NULL);
element = *element_ptr;
g_return_if_fail (element != NULL);
next = element->next;
first_item = (element->prev == NULL);
dummy = g_list_remove_link (NULL, element);
for (l = working_list; l; l = l->next)
{
Iteration *i = l->data;
if (i->iterator == element)
{
i->iterator = next;
}
if (first_item && *(i->list) == element)
{
*(i->list) = next;
}
}
g_list_free_1 (element);
}
void
spi_re_entrant_list_foreach (GList **list,
SpiReEntrantFn func,
gpointer user_data)
{
Iteration i;
if (!list || !*list)
{
return;
}
i.list = list;
i.iterator = *list;
working_list = g_slist_prepend (working_list, &i);
while (i.iterator) {
GList *l = i.iterator;
func (&i.iterator, user_data);
if (i.iterator == l)
i.iterator = i.iterator->next;
}
working_list = g_slist_remove (working_list, &i);
}
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