From: Benjamin Otte <otte@gnome.org>
Date: Thu, 27 Mar 2003 03:16:08 +0000 (+0000)
Subject: cleanup: remove writer/reader booleans, just signal everytime bugfix: signal not_full... 
X-Git-Tag: BRANCH-ERROR-ROOT~355
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fec6a61298b8a5ca3c2a00263b998b4467de2aec;p=platform%2Fupstream%2Fgstreamer.git

cleanup: remove writer/reader booleans, just signal everytime bugfix: signal not_full after flush (Martin Janzen)

Original commit message from CVS:
cleanup: remove writer/reader booleans, just signal everytime
bugfix: signal not_full after flush (Martin Janzen)
---

diff --git a/gst/gstqueue.c b/gst/gstqueue.c
index d0d37f2..a24dcb6 100644
--- a/gst/gstqueue.c
+++ b/gst/gstqueue.c
@@ -239,8 +239,6 @@ gst_queue_init (GstQueue *queue)
   queue->flush = FALSE;
 
   queue->qlock = g_mutex_new ();
-  queue->reader = FALSE;
-  queue->writer = FALSE;
   queue->not_empty = g_cond_new ();
   queue->not_full = g_cond_new ();
   queue->events = g_async_queue_new();
@@ -253,10 +251,11 @@ gst_queue_dispose (GObject *object)
 {
   GstQueue *queue = GST_QUEUE (object);
 
+  gst_queue_locked_flush (queue);
+
   g_mutex_free (queue->qlock);
   g_cond_free (queue->not_empty);
   g_cond_free (queue->not_full);
-  gst_queue_locked_flush (queue);
   g_queue_free (queue->queue);
 
   g_async_queue_unref(queue->events);
@@ -296,13 +295,14 @@ gst_queue_locked_flush (GstQueue *queue)
   queue->level_time = G_GINT64_CONSTANT (0);
   /* make sure any pending buffers to be added are flushed too */
   queue->flush = TRUE;
+  /* signal not_full, since we apparently aren't full anymore */
+  g_cond_signal (queue->not_full);
 }
 
 static void
 gst_queue_chain (GstPad *pad, GstBuffer *buf)
 {
   GstQueue *queue;
-  gboolean reader;
 
   g_return_if_fail (pad != NULL);
   g_return_if_fail (GST_IS_PAD (pad));
@@ -421,11 +421,7 @@ restart:
 
       GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d", 
 		      queue->level_buffers, queue->size_buffers);
-      if (queue->writer)
-        GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "WARNING: multiple writers on queue!");
-      queue->writer = TRUE;
       g_cond_wait (queue->not_full, queue->qlock);
-      queue->writer = FALSE;
       GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_full signal");
     }
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d",
@@ -445,16 +441,10 @@ restart:
       GST_DEBUG_PAD_NAME(pad),
       queue->level_buffers, queue->size_buffers);
 
-  /* reader waiting on an empty queue */
-  reader = queue->reader;
-
+  GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
+  g_cond_signal (queue->not_empty);
   g_mutex_unlock (queue->qlock);
 
-  if (reader)
-  {
-    GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
-    g_cond_signal (queue->not_empty);
-  }
   return;
 
 out_unref:
@@ -468,7 +458,6 @@ gst_queue_get (GstPad *pad)
   GstQueue *queue;
   GstBuffer *buf = NULL;
   gpointer front;
-  gboolean writer;
 
   g_assert(pad != NULL);
   g_assert(GST_IS_PAD(pad));
@@ -509,11 +498,8 @@ restart:
     }
 
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d", queue->level_buffers, queue->size_buffers);
-    if (queue->reader)
-      GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "WARNING: multiple readers on queue!");
-    queue->reader = TRUE;
     
-    //if (queue->block_timeout > -1){
+    /* if (queue->block_timeout > -1){ */
     if (FALSE) {
       GTimeVal timeout;
       g_get_current_time(&timeout);
@@ -527,7 +513,6 @@ restart:
     else {
       g_cond_wait (queue->not_empty, queue->qlock);
     }
-    queue->reader = FALSE;
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
   }
   GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d", queue->level_buffers, queue->size_buffers);
@@ -546,17 +531,11 @@ restart:
   /* this assertion _has_ to hold */
   g_assert (queue->queue->length == queue->level_buffers);
 
-  /* writer waiting on a full queue */
-  writer = queue->writer;
+  GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
+  g_cond_signal (queue->not_full);
 
   g_mutex_unlock (queue->qlock);
 
-  if (writer)
-  {
-    GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
-    g_cond_signal (queue->not_full);
-  }
-
   /* FIXME where should this be? locked? */
   if (GST_IS_EVENT(buf)) {
     GstEvent *event = GST_EVENT(buf);
@@ -663,8 +642,7 @@ gst_queue_change_state (GstElement *element)
       if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
         GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
         /* FIXME can this be? */
-        if (queue->reader)
-          g_cond_signal (queue->not_empty);
+        g_cond_signal (queue->not_empty);
 
         ret = GST_STATE_FAILURE;
         goto error;
diff --git a/gst/gstqueue.h b/gst/gstqueue.h
index 86f0df6..b329474 100644
--- a/gst/gstqueue.h
+++ b/gst/gstqueue.h
@@ -78,9 +78,6 @@ struct _GstQueue {
   gboolean flush;
 
   GMutex *qlock;	/* lock for queue (vs object lock) */
-  /* we are single reader and single writer queue */
-  gboolean reader;	/* reader waiting on empty queue */
-  gboolean writer;	/* writer waiting on full queue */
   GCond *not_empty;	/* signals buffers now available for reading */
   GCond *not_full;	/* signals space now available for writing */
 
diff --git a/plugins/elements/gstqueue.c b/plugins/elements/gstqueue.c
index d0d37f2..a24dcb6 100644
--- a/plugins/elements/gstqueue.c
+++ b/plugins/elements/gstqueue.c
@@ -239,8 +239,6 @@ gst_queue_init (GstQueue *queue)
   queue->flush = FALSE;
 
   queue->qlock = g_mutex_new ();
-  queue->reader = FALSE;
-  queue->writer = FALSE;
   queue->not_empty = g_cond_new ();
   queue->not_full = g_cond_new ();
   queue->events = g_async_queue_new();
@@ -253,10 +251,11 @@ gst_queue_dispose (GObject *object)
 {
   GstQueue *queue = GST_QUEUE (object);
 
+  gst_queue_locked_flush (queue);
+
   g_mutex_free (queue->qlock);
   g_cond_free (queue->not_empty);
   g_cond_free (queue->not_full);
-  gst_queue_locked_flush (queue);
   g_queue_free (queue->queue);
 
   g_async_queue_unref(queue->events);
@@ -296,13 +295,14 @@ gst_queue_locked_flush (GstQueue *queue)
   queue->level_time = G_GINT64_CONSTANT (0);
   /* make sure any pending buffers to be added are flushed too */
   queue->flush = TRUE;
+  /* signal not_full, since we apparently aren't full anymore */
+  g_cond_signal (queue->not_full);
 }
 
 static void
 gst_queue_chain (GstPad *pad, GstBuffer *buf)
 {
   GstQueue *queue;
-  gboolean reader;
 
   g_return_if_fail (pad != NULL);
   g_return_if_fail (GST_IS_PAD (pad));
@@ -421,11 +421,7 @@ restart:
 
       GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d", 
 		      queue->level_buffers, queue->size_buffers);
-      if (queue->writer)
-        GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "WARNING: multiple writers on queue!");
-      queue->writer = TRUE;
       g_cond_wait (queue->not_full, queue->qlock);
-      queue->writer = FALSE;
       GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_full signal");
     }
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d",
@@ -445,16 +441,10 @@ restart:
       GST_DEBUG_PAD_NAME(pad),
       queue->level_buffers, queue->size_buffers);
 
-  /* reader waiting on an empty queue */
-  reader = queue->reader;
-
+  GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
+  g_cond_signal (queue->not_empty);
   g_mutex_unlock (queue->qlock);
 
-  if (reader)
-  {
-    GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
-    g_cond_signal (queue->not_empty);
-  }
   return;
 
 out_unref:
@@ -468,7 +458,6 @@ gst_queue_get (GstPad *pad)
   GstQueue *queue;
   GstBuffer *buf = NULL;
   gpointer front;
-  gboolean writer;
 
   g_assert(pad != NULL);
   g_assert(GST_IS_PAD(pad));
@@ -509,11 +498,8 @@ restart:
     }
 
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d", queue->level_buffers, queue->size_buffers);
-    if (queue->reader)
-      GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "WARNING: multiple readers on queue!");
-    queue->reader = TRUE;
     
-    //if (queue->block_timeout > -1){
+    /* if (queue->block_timeout > -1){ */
     if (FALSE) {
       GTimeVal timeout;
       g_get_current_time(&timeout);
@@ -527,7 +513,6 @@ restart:
     else {
       g_cond_wait (queue->not_empty, queue->qlock);
     }
-    queue->reader = FALSE;
     GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
   }
   GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d", queue->level_buffers, queue->size_buffers);
@@ -546,17 +531,11 @@ restart:
   /* this assertion _has_ to hold */
   g_assert (queue->queue->length == queue->level_buffers);
 
-  /* writer waiting on a full queue */
-  writer = queue->writer;
+  GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
+  g_cond_signal (queue->not_full);
 
   g_mutex_unlock (queue->qlock);
 
-  if (writer)
-  {
-    GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
-    g_cond_signal (queue->not_full);
-  }
-
   /* FIXME where should this be? locked? */
   if (GST_IS_EVENT(buf)) {
     GstEvent *event = GST_EVENT(buf);
@@ -663,8 +642,7 @@ gst_queue_change_state (GstElement *element)
       if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
         GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
         /* FIXME can this be? */
-        if (queue->reader)
-          g_cond_signal (queue->not_empty);
+        g_cond_signal (queue->not_empty);
 
         ret = GST_STATE_FAILURE;
         goto error;
diff --git a/plugins/elements/gstqueue.h b/plugins/elements/gstqueue.h
index 86f0df6..b329474 100644
--- a/plugins/elements/gstqueue.h
+++ b/plugins/elements/gstqueue.h
@@ -78,9 +78,6 @@ struct _GstQueue {
   gboolean flush;
 
   GMutex *qlock;	/* lock for queue (vs object lock) */
-  /* we are single reader and single writer queue */
-  gboolean reader;	/* reader waiting on empty queue */
-  gboolean writer;	/* writer waiting on full queue */
   GCond *not_empty;	/* signals buffers now available for reading */
   GCond *not_full;	/* signals space now available for writing */