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aggregator: Make the PAD_LOCK private

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Instead of using the GST_OBJECT_LOCK we should have
a dedicated mutex for the pad as it is also associated
with the mutex on the EVENT_MUTEX on which we wait
in the _chain function of the pad.

The GstAggregatorPad.segment is still protected with the
GST_OBJECT_LOCK.

Remove the gst_aggregator_pad_peak_unlocked method as it does not make
sense anymore with a private lock.

https://bugzilla.gnome.org/show_bug.cgi?id=742684
This commit is contained in:
Thibault Saunier 2015-01-26 11:29:08 +01:00 committed by Tim-Philipp Müller
parent 5f176b724b
commit ae12041f0c
2 changed files with 21 additions and 40 deletions
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56
libs/gst/base/gstaggregator.c
View file

@ -81,7 +81,7 @@ GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
#define PAD_LOCK(pad) G_STMT_START { \
GST_TRACE_OBJECT (pad, "Taking PAD lock from thread %p", \
g_thread_self()); \
GST_OBJECT_LOCK (pad); \
g_mutex_lock(&pad->priv->lock); \
GST_TRACE_OBJECT (pad, "Took PAD lock from thread %p", \
g_thread_self()); \
} G_STMT_END
@ -89,7 +89,7 @@ GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
#define PAD_UNLOCK(pad) G_STMT_START { \
GST_TRACE_OBJECT (pad, "Releasing PAD lock from thread %p", \
g_thread_self()); \
GST_OBJECT_UNLOCK (pad); \
g_mutex_unlock(&pad->priv->lock); \
GST_TRACE_OBJECT (pad, "Release PAD lock from thread %p", \
g_thread_self()); \
} G_STMT_END
@ -99,7 +99,7 @@ GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
GST_LOG_OBJECT (pad, "Waiting for EVENT on thread %p", \
g_thread_self()); \
g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
GST_OBJECT_GET_LOCK (pad)); \
(&((GstAggregatorPad*)pad)->priv->lock)); \
GST_LOG_OBJECT (pad, "DONE Waiting for EVENT on thread %p", \
g_thread_self()); \
} G_STMT_END
@ -170,6 +170,7 @@ struct _GstAggregatorPadPrivate
GstBuffer *buffer;
gboolean eos;
GMutex lock;
GCond event_cond;
GMutex stream_lock;
@ -879,10 +880,10 @@ gst_aggregator_default_sink_event (GstAggregator * self,
}
case GST_EVENT_SEGMENT:
{
PAD_LOCK (aggpad);
GST_OBJECT_LOCK (aggpad);
gst_event_copy_segment (event, &aggpad->segment);
GST_OBJECT_UNLOCK (aggpad);
self->priv->seqnum = gst_event_get_seqnum (event);
PAD_UNLOCK (aggpad);
goto eat;
}
case GST_EVENT_STREAM_START:
@ -1948,6 +1949,7 @@ gst_aggregator_pad_finalize (GObject * object)
g_cond_clear (&pad->priv->event_cond);
g_mutex_clear (&pad->priv->stream_lock);
g_mutex_clear (&pad->priv->lock);
G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
}
@ -1988,37 +1990,7 @@ gst_aggregator_pad_init (GstAggregatorPad * pad)
g_cond_init (&pad->priv->event_cond);
g_mutex_init (&pad->priv->stream_lock);
}
/**
* gst_aggregator_pad_steal_buffer_unlocked:
* @pad: the pad to get buffer from
*
* Steal the ref to the buffer currently queued in @pad.
*
* MUST be called with the pad's object lock held.
*
* Returns: (transfer full): The buffer in @pad or NULL if no buffer was
* queued. You should unref the buffer after usage.
*/
GstBuffer *
gst_aggregator_pad_steal_buffer_unlocked (GstAggregatorPad * pad)
{
GstBuffer *buffer = NULL;
if (pad->priv->buffer) {
GST_TRACE_OBJECT (pad, "Consuming buffer");
buffer = pad->priv->buffer;
pad->priv->buffer = NULL;
if (pad->priv->pending_eos) {
pad->priv->pending_eos = FALSE;
pad->priv->eos = TRUE;
}
PAD_BROADCAST_EVENT (pad);
GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
}
return buffer;
g_mutex_init (&pad->priv->lock);
}
/**
@ -2036,7 +2008,17 @@ gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
GstBuffer *buffer = NULL;
PAD_LOCK (pad);
buffer = gst_aggregator_pad_steal_buffer_unlocked (pad);
if (pad->priv->buffer) {
GST_TRACE_OBJECT (pad, "Consuming buffer");
buffer = pad->priv->buffer;
pad->priv->buffer = NULL;
if (pad->priv->pending_eos) {
pad->priv->pending_eos = FALSE;
pad->priv->eos = TRUE;
}
PAD_BROADCAST_EVENT (pad);
GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
}
PAD_UNLOCK (pad);
return buffer;

3
libs/gst/base/gstaggregator.h
View file

@ -69,7 +69,7 @@ struct _GstAggregatorPad
{
GstPad parent;
/* Protected by the pad's object lock */
/* Protected by the OBJECT_LOCK */
GstSegment segment;
/* < Private > */
@ -103,7 +103,6 @@ GType gst_aggregator_pad_get_type (void);
***************************/
GstBuffer * gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad);
GstBuffer * gst_aggregator_pad_steal_buffer_unlocked (GstAggregatorPad * pad);
GstBuffer * gst_aggregator_pad_get_buffer (GstAggregatorPad * pad);
gboolean gst_aggregator_pad_is_eos (GstAggregatorPad * pad);