/usr/include/glib-2.0/gobject/gobjectnotifyqueue.c is in libglib2.0-dev 2.50.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | /* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/* WARNING:
*
* This file is INSTALLED and other projects (outside of glib)
* #include its contents.
*/
#ifndef __G_OBJECT_NOTIFY_QUEUE_H__
#define __G_OBJECT_NOTIFY_QUEUE_H__
#include <string.h> /* memset */
#include <glib-object.h>
G_BEGIN_DECLS
/* --- typedefs --- */
typedef struct _GObjectNotifyContext GObjectNotifyContext;
typedef struct _GObjectNotifyQueue GObjectNotifyQueue;
typedef void (*GObjectNotifyQueueDispatcher) (GObject *object,
guint n_pspecs,
GParamSpec **pspecs);
/* --- structures --- */
struct _GObjectNotifyContext
{
GQuark quark_notify_queue;
GObjectNotifyQueueDispatcher dispatcher;
GTrashStack *_nqueue_trash; /* unused */
};
struct _GObjectNotifyQueue
{
GObjectNotifyContext *context;
GSList *pspecs;
guint16 n_pspecs;
guint16 freeze_count;
};
G_LOCK_DEFINE_STATIC(notify_lock);
/* --- functions --- */
static void
g_object_notify_queue_free (gpointer data)
{
GObjectNotifyQueue *nqueue = data;
g_slist_free (nqueue->pspecs);
g_slice_free (GObjectNotifyQueue, nqueue);
}
static inline GObjectNotifyQueue*
g_object_notify_queue_freeze (GObject *object,
GObjectNotifyContext *context)
{
GObjectNotifyQueue *nqueue;
G_LOCK(notify_lock);
nqueue = g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
if (!nqueue)
{
nqueue = g_slice_new0 (GObjectNotifyQueue);
nqueue->context = context;
g_datalist_id_set_data_full (&object->qdata, context->quark_notify_queue,
nqueue, g_object_notify_queue_free);
}
if (nqueue->freeze_count >= 65535)
g_critical("Free queue for %s (%p) is larger than 65535,"
" called g_object_freeze_notify() too often."
" Forgot to call g_object_thaw_notify() or infinite loop",
G_OBJECT_TYPE_NAME (object), object);
else
nqueue->freeze_count++;
G_UNLOCK(notify_lock);
return nqueue;
}
static inline void
g_object_notify_queue_thaw (GObject *object,
GObjectNotifyQueue *nqueue)
{
GObjectNotifyContext *context = nqueue->context;
GParamSpec *pspecs_mem[16], **pspecs, **free_me = NULL;
GSList *slist;
guint n_pspecs = 0;
g_return_if_fail (nqueue->freeze_count > 0);
g_return_if_fail (g_atomic_int_get(&object->ref_count) > 0);
G_LOCK(notify_lock);
/* Just make sure we never get into some nasty race condition */
if (G_UNLIKELY(nqueue->freeze_count == 0)) {
G_UNLOCK(notify_lock);
g_warning ("%s: property-changed notification for %s(%p) is not frozen",
G_STRFUNC, G_OBJECT_TYPE_NAME (object), object);
return;
}
nqueue->freeze_count--;
if (nqueue->freeze_count) {
G_UNLOCK(notify_lock);
return;
}
pspecs = nqueue->n_pspecs > 16 ? free_me = g_new (GParamSpec*, nqueue->n_pspecs) : pspecs_mem;
for (slist = nqueue->pspecs; slist; slist = slist->next)
{
pspecs[n_pspecs++] = slist->data;
}
g_datalist_id_set_data (&object->qdata, context->quark_notify_queue, NULL);
G_UNLOCK(notify_lock);
if (n_pspecs)
context->dispatcher (object, n_pspecs, pspecs);
g_free (free_me);
}
static inline void
g_object_notify_queue_clear (GObject *object,
GObjectNotifyQueue *nqueue)
{
g_return_if_fail (nqueue->freeze_count > 0);
G_LOCK(notify_lock);
g_slist_free (nqueue->pspecs);
nqueue->pspecs = NULL;
nqueue->n_pspecs = 0;
G_UNLOCK(notify_lock);
}
static inline void
g_object_notify_queue_add (GObject *object,
GObjectNotifyQueue *nqueue,
GParamSpec *pspec)
{
if (pspec->flags & G_PARAM_READABLE)
{
GParamSpec *redirect;
G_LOCK(notify_lock);
g_return_if_fail (nqueue->n_pspecs < 65535);
redirect = g_param_spec_get_redirect_target (pspec);
if (redirect)
pspec = redirect;
/* we do the deduping in _thaw */
if (g_slist_find (nqueue->pspecs, pspec) == NULL)
{
nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
nqueue->n_pspecs++;
}
G_UNLOCK(notify_lock);
}
}
/* NB: This function is not threadsafe, do not ever use it if
* you need a threadsafe notify queue.
* Use g_object_notify_queue_freeze() to acquire the queue and
* g_object_notify_queue_thaw() after you are done instead.
*/
static inline GObjectNotifyQueue*
g_object_notify_queue_from_object (GObject *object,
GObjectNotifyContext *context)
{
return g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
}
G_END_DECLS
#endif /* __G_OBJECT_NOTIFY_QUEUE_H__ */
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