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miniobject: add steal_qdata
Rework the qdata code a little
This commit is contained in:
Wim Taymans
parent
03ac16c1d8
commit
d3f5dd0707
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@ -71,14 +71,16 @@ static GQuark weak_ref_quark;
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typedef struct
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{
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GQuark quark;
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GstMiniObjectWeakNotify notify;
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GstMiniObjectNotify notify;
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gpointer data;
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GDestroyNotify destroy;
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} GstQData;
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#define QDATA(o,i) ((GstQData *)(o)->qdata)[(i)]
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#define QDATA_QUARK(o,i) (QDATA(o,i).quark)
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#define QDATA_NOTIFY(o,i) (QDATA(o,i).notify)
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#define QDATA_DATA(o,i) (QDATA(o,i).data)
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#define QDATA(o,i) ((GstQData *)(o)->qdata)[(i)]
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#define QDATA_QUARK(o,i) (QDATA(o,i).quark)
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#define QDATA_NOTIFY(o,i) (QDATA(o,i).notify)
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#define QDATA_DATA(o,i) (QDATA(o,i).data)
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#define QDATA_DESTROY(o,i) (QDATA(o,i).destroy)
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void
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_priv_gst_mini_object_initialize (void)
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@ -238,14 +240,62 @@ gst_mini_object_ref (GstMiniObject * mini_object)
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return mini_object;
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}
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static void
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qdata_notify (GstMiniObject * obj)
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static gint
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find_notify (GstMiniObject * object, GQuark quark, gboolean match_notify,
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GstMiniObjectNotify notify, gpointer data)
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{
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guint i;
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for (i = 0; i < obj->n_qdata; i++)
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QDATA_NOTIFY (obj, i) (QDATA_DATA (obj, i), obj);
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g_free (obj->qdata);
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for (i = 0; i < object->n_qdata; i++) {
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if (QDATA_QUARK (object, i) == quark) {
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/* check if we need to match the callback too */
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if (!match_notify || (QDATA_NOTIFY (object, i) == notify &&
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QDATA_DATA (object, i) == data))
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return i;
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}
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}
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return -1;
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}
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static void
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remove_notify (GstMiniObject * object, gint index)
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{
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/* remove item */
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if (--object->n_qdata == 0) {
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/* we don't shrink but free when everything is gone */
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g_free (object->qdata);
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object->qdata = NULL;
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} else if (index != object->n_qdata)
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QDATA (object, index) = QDATA (object, object->n_qdata);
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}
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static void
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set_notify (GstMiniObject * object, gint index, GQuark quark,
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GstMiniObjectNotify notify, gpointer data, GDestroyNotify destroy)
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{
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if (index == -1) {
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/* add item */
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index = object->n_qdata++;
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object->qdata =
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g_realloc (object->qdata, sizeof (GstQData) * object->n_qdata);
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}
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QDATA_QUARK (object, index) = quark;
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QDATA_NOTIFY (object, index) = notify;
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QDATA_DATA (object, index) = data;
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QDATA_DESTROY (object, index) = destroy;
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}
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static void
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call_finalize_notify (GstMiniObject * obj)
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{
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guint i;
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for (i = 0; i < obj->n_qdata; i++) {
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if (QDATA_QUARK (obj, i) == weak_ref_quark)
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QDATA_NOTIFY (obj, i) (QDATA_DATA (obj, i), obj);
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if (QDATA_DESTROY (obj, i))
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QDATA_DESTROY (obj, i) (QDATA_DATA (obj, i));
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}
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}
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/**
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@ -278,10 +328,10 @@ gst_mini_object_unref (GstMiniObject * mini_object)
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/* if the subclass recycled the object (and returned FALSE) we don't
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* want to free the instance anymore */
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if (G_LIKELY (do_free)) {
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/* The weak reference stack is freed in the notification function */
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if (mini_object->n_qdata)
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qdata_notify (mini_object);
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if (mini_object->n_qdata) {
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call_finalize_notify (mini_object);
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g_free (mini_object->qdata);
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}
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#ifndef GST_DISABLE_TRACE
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_gst_alloc_trace_free (_gst_mini_object_trace, mini_object);
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#endif
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@ -423,21 +473,14 @@ gst_mini_object_take (GstMiniObject ** olddata, GstMiniObject * newdata)
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*/
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void
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gst_mini_object_weak_ref (GstMiniObject * object,
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GstMiniObjectWeakNotify notify, gpointer data)
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GstMiniObjectNotify notify, gpointer data)
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{
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guint i;
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g_return_if_fail (object != NULL);
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g_return_if_fail (notify != NULL);
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g_return_if_fail (GST_MINI_OBJECT_REFCOUNT_VALUE (object) >= 1);
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G_LOCK (qdata_mutex);
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i = object->n_qdata++;
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object->qdata =
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g_realloc (object->qdata, sizeof (GstQData) * object->n_qdata);
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QDATA_QUARK (object, i) = weak_ref_quark;
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QDATA_NOTIFY (object, i) = notify;
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QDATA_DATA (object, i) = data;
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set_notify (object, -1, weak_ref_quark, notify, data, NULL);
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G_UNLOCK (qdata_mutex);
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}
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@ -447,38 +490,26 @@ gst_mini_object_weak_ref (GstMiniObject * object,
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* @notify: callback to search for
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* @data: data to search for
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*
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* Removes a weak reference callback to a mini object.
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* Removes a weak reference callback from a mini object.
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*
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* Since: 0.10.35
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*/
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void
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gst_mini_object_weak_unref (GstMiniObject * object,
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GstMiniObjectWeakNotify notify, gpointer data)
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GstMiniObjectNotify notify, gpointer data)
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{
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guint i;
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gboolean found_one = FALSE;
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gint i;
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g_return_if_fail (object != NULL);
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g_return_if_fail (notify != NULL);
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G_LOCK (qdata_mutex);
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for (i = 0; i < object->n_qdata; i++) {
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if (QDATA_QUARK (object, i) == weak_ref_quark &&
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QDATA_NOTIFY (object, i) == notify && QDATA_DATA (object, i) == data) {
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found_one = TRUE;
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if (--object->n_qdata == 0) {
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/* we don't shrink but free when everything is gone */
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g_free (object->qdata);
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object->qdata = NULL;
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} else if (i != object->n_qdata)
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QDATA (object, i) = QDATA (object, object->n_qdata);
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break;
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}
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if ((i = find_notify (object, weak_ref_quark, TRUE, notify, data)) != -1) {
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remove_notify (object, i);
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} else {
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g_warning ("%s: couldn't find weak ref %p(%p)", G_STRFUNC, notify, data);
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}
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G_UNLOCK (qdata_mutex);
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if (!found_one)
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g_warning ("%s: couldn't find weak ref %p(%p)", G_STRFUNC, notify, data);
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}
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/**
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@ -506,7 +537,7 @@ void
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gst_mini_object_set_qdata (GstMiniObject * object, GQuark quark,
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gpointer data, GDestroyNotify destroy)
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{
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guint i;
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gint i;
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gpointer old_data = NULL;
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GDestroyNotify old_notify = NULL;
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@ -514,32 +545,16 @@ gst_mini_object_set_qdata (GstMiniObject * object, GQuark quark,
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g_return_if_fail (quark > 0);
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G_LOCK (qdata_mutex);
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for (i = 0; i < object->n_qdata; i++) {
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if (QDATA_QUARK (object, i) == quark) {
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old_data = QDATA_DATA (object, i);
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old_notify = (GDestroyNotify) QDATA_NOTIFY (object, i);
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if ((i = find_notify (object, quark, FALSE, NULL, NULL)) != -1) {
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if (data == NULL) {
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/* remove item */
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if (--object->n_qdata == 0) {
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/* we don't shrink but free when everything is gone */
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g_free (object->qdata);
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object->qdata = NULL;
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} else if (i != object->n_qdata)
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QDATA (object, i) = QDATA (object, object->n_qdata);
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}
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break;
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}
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old_data = QDATA_DATA (object, i);
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old_notify = QDATA_DESTROY (object, i);
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if (data == NULL)
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remove_notify (object, i);
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}
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if (!old_data) {
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/* add item */
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i = object->n_qdata++;
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object->qdata =
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g_realloc (object->qdata, sizeof (GstQData) * object->n_qdata);
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}
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QDATA_QUARK (object, i) = quark;
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QDATA_DATA (object, i) = data;
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QDATA_NOTIFY (object, i) = (GstMiniObjectWeakNotify) destroy;
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if (data != NULL)
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set_notify (object, i, quark, NULL, data, destroy);
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G_UNLOCK (qdata_mutex);
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if (old_notify)
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@ -560,17 +575,47 @@ gpointer
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gst_mini_object_get_qdata (GstMiniObject * object, GQuark quark)
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{
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guint i;
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gpointer result = NULL;
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gpointer result;
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g_return_val_if_fail (object != NULL, NULL);
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g_return_val_if_fail (quark > 0, NULL);
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G_LOCK (qdata_mutex);
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for (i = 0; i < object->n_qdata; i++) {
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if (QDATA_QUARK (object, i) == quark) {
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result = QDATA_DATA (object, i);
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break;
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}
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if ((i = find_notify (object, quark, FALSE, NULL, NULL)) != -1)
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result = QDATA_DATA (object, i);
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else
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result = NULL;
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G_UNLOCK (qdata_mutex);
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return result;
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}
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/**
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* gst_mini_object_steal_qdata:
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* @object: The GstMiniObject to get a stored user data pointer from
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* @quark: A #GQuark, naming the user data pointer
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*
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* This function gets back user data pointers stored via gst_mini_object_set_qdata()
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* and removes the data from @object without invoking its destroy() function (if
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* any was set).
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*
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* Returns: (transfer full): The user data pointer set, or %NULL
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*/
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gpointer
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gst_mini_object_steal_qdata (GstMiniObject * object, GQuark quark)
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{
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guint i;
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gpointer result;
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g_return_val_if_fail (object != NULL, NULL);
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g_return_val_if_fail (quark > 0, NULL);
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G_LOCK (qdata_mutex);
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if ((i = find_notify (object, quark, FALSE, NULL, NULL)) != -1) {
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result = QDATA_DATA (object, i);
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remove_notify (object, i);
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} else {
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result = NULL;
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}
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G_UNLOCK (qdata_mutex);
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@ -68,20 +68,14 @@ typedef gboolean (*GstMiniObjectDisposeFunction) (GstMiniObject *obj);
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typedef void (*GstMiniObjectFreeFunction) (GstMiniObject *obj);
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/**
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* GstMiniObjectWeakNotify:
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* @user_data: data that was provided when the weak reference was established
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* @where_the_mini_object_was: the mini object being finalized
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* GstMiniObjectNotify:
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* @user_data: data that was provided when the notify was added
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* @obj: the mini object
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*
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* A #GstMiniObjectWeakNotify function can be added to a mini object as a
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* callback that gets triggered when the mini object is finalized. Since the
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* mini object is already being finalized when the #GstMiniObjectWeakNotify is
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* called, there's not much you could do with the object, apart from e.g. using
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* its adress as hash-index or the like.
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*
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* Since: 0.10.35
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* A #GstMiniObjectNotify function can be added to a mini object as a
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* callback that gets triggered with gst_mini_object_notify().
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*/
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typedef void (*GstMiniObjectWeakNotify) (gpointer user_data,
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GstMiniObject * where_the_mini_object_was);
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typedef void (*GstMiniObjectNotify) (gpointer user_data, GstMiniObject * obj);
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/**
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* GST_MINI_OBJECT_TYPE:
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@ -195,15 +189,16 @@ GstMiniObject * gst_mini_object_ref (GstMiniObject *mini_object);
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void gst_mini_object_unref (GstMiniObject *mini_object);
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void gst_mini_object_weak_ref (GstMiniObject *object,
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GstMiniObjectWeakNotify notify,
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GstMiniObjectNotify notify,
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gpointer data);
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void gst_mini_object_weak_unref (GstMiniObject *object,
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GstMiniObjectWeakNotify notify,
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GstMiniObjectNotify notify,
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gpointer data);
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void gst_mini_object_set_qdata (GstMiniObject *object, GQuark quark,
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gpointer data, GDestroyNotify destroy);
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gpointer gst_mini_object_get_qdata (GstMiniObject *object, GQuark quark);
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gpointer gst_mini_object_steal_qdata (GstMiniObject *object, GQuark quark);
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gboolean gst_mini_object_replace (GstMiniObject **olddata, GstMiniObject *newdata);
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@ -603,6 +603,7 @@ EXPORTS
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gst_mini_object_replace
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gst_mini_object_set_qdata
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gst_mini_object_steal
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gst_mini_object_steal_qdata
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gst_mini_object_take
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gst_mini_object_unref
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gst_mini_object_weak_ref
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