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validate-scenario: Use thread-safe GWeakRef

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Since _set_done() is meant to be thread safe,
it can not be used with g_object_add_weak_pointer(),
instead, one must use GWeakRef. But since it is in the API,
document that fact and add a couple assertions to make sure
it doesn't get broken in the future.
This commit is contained in:
Olivier Crête 2015-07-24 16:47:57 -04:00
parent ae9dec4cc3
commit 386b91522c
2 changed files with 27 additions and 3 deletions
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27
validate/gst/validate/gst-validate-scenario.c
View file

@ -189,6 +189,8 @@ struct _GstValidateActionPrivate
gboolean printed;
gboolean executing_last_subaction;
gboolean optional;
GWeakRef scenario;
};
GST_DEFINE_MINI_OBJECT_TYPE (GstValidateAction, gst_validate_action);
@ -231,6 +233,8 @@ _action_free (GstValidateAction * action)
g_object_remove_weak_pointer (G_OBJECT (action->scenario),
((gpointer *) & action->scenario));
g_weak_ref_clear (&action->priv->scenario);
g_slice_free (GstValidateActionPrivate, action->priv);
g_slice_free (GstValidateAction, action);
}
@ -243,6 +247,8 @@ gst_validate_action_init (GstValidateAction * action)
(GstMiniObjectFreeFunction) _action_free);
action->priv = g_slice_new0 (GstValidateActionPrivate);
g_weak_ref_init (&action->priv->scenario, NULL);
}
static void
@ -262,6 +268,7 @@ gst_validate_action_new (GstValidateScenario * scenario,
action->type = action_type->name;
action->repeat = -1;
g_weak_ref_set (&action->priv->scenario, scenario);
action->scenario = scenario;
if (scenario)
g_object_add_weak_pointer (G_OBJECT (scenario),
@ -2176,6 +2183,11 @@ static void
_pipeline_freed_cb (GstValidateScenario * scenario,
GObject * where_the_object_was)
{
/* Because g_object_weak_ref() is used, this MUST be on the
* main thread. */
g_assert (g_main_context_acquire (g_main_context_default ()));
g_main_context_release (g_main_context_default ());
scenario->pipeline = NULL;
GST_DEBUG_OBJECT (scenario, "pipeline was freed");
@ -2508,6 +2520,11 @@ gst_validate_scenario_finalize (GObject * object)
{
GstValidateScenarioPrivate *priv = GST_VALIDATE_SCENARIO (object)->priv;
/* Because g_object_add_weak_pointer() is used, this MUST be on the
* main thread. */
g_assert (g_main_context_acquire (g_main_context_default ()));
g_main_context_release (g_main_context_default ());
g_list_free_full (priv->actions, (GDestroyNotify) gst_mini_object_unref);
g_list_free_full (priv->interlaced_actions,
(GDestroyNotify) gst_mini_object_unref);
@ -2912,18 +2929,22 @@ _action_set_done (GstValidateAction * action)
void
gst_validate_action_set_done (GstValidateAction * action)
{
GstValidateScenario *scenario = action->scenario;
if (action->priv->state == GST_VALIDATE_EXECUTE_ACTION_INTERLACED) {
GstValidateScenario *scenario = g_weak_ref_get (&action->priv->scenario);
GList *item = NULL;
if (scenario) {
SCENARIO_LOCK (scenario);
item = g_list_find (scenario->priv->interlaced_actions, action);
scenario->priv->interlaced_actions =
g_list_remove (scenario->priv->interlaced_actions, action);
g_list_delete_link (scenario->priv->interlaced_actions, item);
SCENARIO_UNLOCK (scenario);
g_object_unref (scenario);
}
gst_validate_action_unref (action);
if (item)
gst_validate_action_unref (action);
}
g_main_context_invoke_full (NULL, G_PRIORITY_DEFAULT_IDLE,

3
validate/gst/validate/gst-validate-scenario.h
View file

@ -88,8 +88,11 @@ typedef struct _GstValidateActionPrivate GstValidateActionPrivate;
* #gst_validate_register_action_type
* @name: The name of the action, set from the user in the scenario
* @structure: the #GstStructure defining the action
* @scenario: The scenario for this action
*
* The GstValidateAction defined to be executed as part of a scenario
*
* Only access it from the default main context.
*/
struct _GstValidateAction
{