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taskpool: expose dispose_handle() API

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This is useful when the subclass does return a non-NULL pointer
in push(), and the user doesn't want to call join()

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/692>
This commit is contained in:
Mathieu Duponchelle 2020-11-03 02:41:31 +01:00 committed by GStreamer Merge Bot
parent c04034c50d
commit b508287add
2 changed files with 48 additions and 1 deletions
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36
gst/gsttaskpool.c
View file

@ -126,6 +126,12 @@ default_join (GstTaskPool * pool, gpointer id)
/* we do nothing here, we can't join from the pools */
}
static void
default_dispose_handle (GstTaskPool * pool, gpointer id)
{
/* we do nothing here, the default handle is NULL */
}
static void
gst_task_pool_class_init (GstTaskPoolClass * klass)
{
@ -143,6 +149,7 @@ gst_task_pool_class_init (GstTaskPoolClass * klass)
gsttaskpool_class->cleanup = default_cleanup;
gsttaskpool_class->push = default_push;
gsttaskpool_class->join = default_join;
gsttaskpool_class->dispose_handle = default_dispose_handle;
}
static void
@ -235,7 +242,9 @@ gst_task_pool_cleanup (GstTaskPool * pool)
*
* Returns: (transfer full) (nullable): a pointer that should be used
* for the gst_task_pool_join function. This pointer can be %NULL, you
* must check @error to detect errors.
* must check @error to detect errors. If the pointer is not %NULL and
* gst_task_pool_join() is not used, call gst_task_pool_dispose_handle()
* instead.
*/
gpointer
gst_task_pool_push (GstTaskPool * pool, GstTaskPoolFunction func,
@ -281,3 +290,28 @@ gst_task_pool_join (GstTaskPool * pool, gpointer id)
if (klass->join)
klass->join (pool, id);
}
/**
* gst_task_pool_dispose_handle:
* @pool: a #GstTaskPool
* @id: (transfer full) (nullable): the id
*
* Dispose of the handle returned by gst_task_pool_push(). This does
* not need to be called with the default implementation as the default
* push() implementation always returns %NULL. This does not need to be
* called either when calling gst_task_pool_join().
*
* Since: 1.20
*/
void
gst_task_pool_dispose_handle (GstTaskPool * pool, gpointer id)
{
GstTaskPoolClass *klass;
g_return_if_fail (GST_IS_TASK_POOL (pool));
klass = GST_TASK_POOL_GET_CLASS (pool);
if (klass->dispose_handle)
klass->dispose_handle (pool, id);
}

13
gst/gsttaskpool.h
View file

@ -67,6 +67,7 @@ struct _GstTaskPool {
* @cleanup: make sure all threads are stopped
* @push: start a new thread
* @join: join a thread
* @dispose_handle: free / unref the handle returned in push
*
* The #GstTaskPoolClass object.
*/
@ -81,6 +82,15 @@ struct _GstTaskPoolClass {
gpointer user_data, GError **error);
void (*join) (GstTaskPool *pool, gpointer id);
/**
* GstTaskPoolClass::dispose_handle:
*
* free / unref the handle returned in push.
*
* Since: 1.20
*/
void (*dispose_handle) (GstTaskPool *pool, gpointer id);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
@ -100,6 +110,9 @@ gpointer gst_task_pool_push (GstTaskPool *pool, GstTaskPoolFunctio
GST_API
void gst_task_pool_join (GstTaskPool *pool, gpointer id);
GST_API
void gst_task_pool_dispose_handle (GstTaskPool *pool, gpointer id);
GST_API
void gst_task_pool_cleanup (GstTaskPool *pool);