1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
19 #ifndef __G_NOTIFY_H__
20 #define __G_NOTIFY_H__
22 #include <string.h> /* memset */
23 #include <glib-object.h>
28 /* --- typedefs --- */
29 typedef struct _GObjectNotifyContext GObjectNotifyContext
;
30 typedef struct _GObjectNotifyQueue GObjectNotifyQueue
;
31 typedef void (*GObjectNotifyQueueDispatcher
) (GObject
*object
,
36 /* --- structures --- */
37 struct _GObjectNotifyContext
39 GQuark quark_notify_queue
;
40 GObjectNotifyQueueDispatcher dispatcher
;
41 GTrashStack
*_nqueue_trash
; /* unused */
43 struct _GObjectNotifyQueue
45 GObjectNotifyContext
*context
;
49 /* currently, this structure abuses the GList allocation chain and thus
50 * must be <= sizeof (GList)
55 /* --- functions --- */
57 g_object_notify_queue_free (gpointer data
)
59 GObjectNotifyQueue
*nqueue
= data
;
61 g_slist_free (nqueue
->pspecs
);
62 g_list_free_1 ((void*) nqueue
);
65 static inline GObjectNotifyQueue
*
66 g_object_notify_queue_freeze (GObject
*object
,
67 GObjectNotifyContext
*context
)
69 GObjectNotifyQueue
*nqueue
;
71 nqueue
= g_datalist_id_get_data (&object
->qdata
, context
->quark_notify_queue
);
74 nqueue
= (void*) g_list_alloc ();
75 memset (nqueue
, 0, sizeof (*nqueue
));
76 nqueue
->context
= context
;
77 g_datalist_id_set_data_full (&object
->qdata
, context
->quark_notify_queue
,
78 nqueue
, g_object_notify_queue_free
);
81 g_return_val_if_fail (nqueue
->freeze_count
< 65535, nqueue
);
82 nqueue
->freeze_count
++;
88 g_object_notify_queue_thaw (GObject
*object
,
89 GObjectNotifyQueue
*nqueue
)
91 GObjectNotifyContext
*context
= nqueue
->context
;
92 GParamSpec
*pspecs_mem
[16], **pspecs
, **free_me
= NULL
;
96 g_return_if_fail (nqueue
->freeze_count
> 0);
98 nqueue
->freeze_count
--;
99 if (nqueue
->freeze_count
)
101 g_return_if_fail (object
->ref_count
> 0);
103 pspecs
= nqueue
->n_pspecs
> 16 ? free_me
= g_new (GParamSpec
*, nqueue
->n_pspecs
) : pspecs_mem
;
104 /* set first entry to NULL since it's checked unconditionally */
106 for (slist
= nqueue
->pspecs
; slist
; slist
= slist
->next
)
108 GParamSpec
*pspec
= slist
->data
;
111 /* dedup, make pspecs in the list unique */
113 if (pspecs
[i
] == pspec
)
116 goto redo_dedup_check
;
118 pspecs
[n_pspecs
++] = pspec
;
120 g_datalist_id_set_data (&object
->qdata
, context
->quark_notify_queue
, NULL
);
123 context
->dispatcher (object
, n_pspecs
, pspecs
);
128 g_object_notify_queue_clear (GObject
*object
,
129 GObjectNotifyQueue
*nqueue
)
131 g_return_if_fail (nqueue
->freeze_count
> 0);
133 g_slist_free (nqueue
->pspecs
);
134 nqueue
->pspecs
= NULL
;
135 nqueue
->n_pspecs
= 0;
139 g_object_notify_queue_add (GObject
*object
,
140 GObjectNotifyQueue
*nqueue
,
143 if (pspec
->flags
& G_PARAM_READABLE
)
145 g_return_if_fail (nqueue
->n_pspecs
< 65535);
147 /* we do the deduping in _thaw */
148 nqueue
->pspecs
= g_slist_prepend (nqueue
->pspecs
, pspec
);
153 static inline GObjectNotifyQueue
*
154 g_object_notify_queue_from_object (GObject
*object
,
155 GObjectNotifyContext
*context
)
157 return g_datalist_id_get_data (&object
->qdata
, context
->quark_notify_queue
);
163 #endif /* __G_OBJECT_H__ */