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tagsetter: make sure only one thread creates the TagData

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This commit is contained in:
Tim-Philipp Müller 2010-05-24 19:06:45 +01:00
parent 99eb992bc0
commit 3ea8b47445
1 changed files with 14 additions and 6 deletions
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20
gst/gsttagsetter.c
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@ -143,12 +143,20 @@ gst_tag_setter_get_data (GstTagSetter * setter)
data = g_object_get_qdata (G_OBJECT (setter), gst_tag_key);
if (!data) {
data = g_slice_new (GstTagData);
g_static_mutex_init (&data->lock);
data->list = NULL;
data->mode = GST_TAG_MERGE_KEEP;
g_object_set_qdata_full (G_OBJECT (setter), gst_tag_key, data,
gst_tag_data_free);
static GStaticMutex create_mutex = G_STATIC_MUTEX_INIT;
/* make sure no other thread is creating a GstTagData at the same time */
g_static_mutex_lock (&create_mutex);
data = g_object_get_qdata (G_OBJECT (setter), gst_tag_key);
if (!data) {
data = g_slice_new (GstTagData);
g_static_mutex_init (&data->lock);
data->list = NULL;
data->mode = GST_TAG_MERGE_KEEP;
g_object_set_qdata_full (G_OBJECT (setter), gst_tag_key, data,
gst_tag_data_free);
}
g_static_mutex_unlock (&create_mutex);
}
return data;