Move webaudio to oilpan

Source/modules/webaudio/AudioNode.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
 #include <stdio.h>
 #endif
 
 namespace WebCore {
 
 AudioNode::AudioNode(AudioContext* context, float sampleRate)
     : m_isInitialized(false)
     , m_nodeType(NodeTypeUnknown)
     , m_context(context)
     , m_sampleRate(sampleRate)
+#if ENABLE(OILPAN)
+    , m_keepAlive(adoptPtr(new Persistent<AudioNode>(this)))
+#endif
     , m_lastProcessingTime(-1)
     , m_lastNonSilentTime(-1)
     , m_normalRefCount(1) // start out with normal refCount == 1 (like WTF::RefCounted class)
     , m_connectionRefCount(0)
     , m_isMarkedForDeletion(false)
     , m_isDisabled(false)
     , m_channelCount(2)
     , m_channelCountMode(Max)
     , m_channelInterpretation(AudioBus::Speakers)
 {
@@ skipping 405 matching lines @@
         if (nodeType() != NodeTypeConvolver && nodeType() != NodeTypeDelay) {
             m_isDisabled = true;
             for (unsigned i = 0; i < m_outputs.size(); ++i)
                 output(i)->disable();
         }
     }
 }
 
 void AudioNode::ref(RefType refType)
 {
+#if ENABLE(OILPAN)
+    ASSERT(m_keepAlive);
+#endif
     switch (refType) {
     case RefTypeNormal:
         atomicIncrement(&m_normalRefCount);
         break;
     case RefTypeConnection:
         atomicIncrement(&m_connectionRefCount);
         break;
     default:
         ASSERT_NOT_REACHED();
     }
@@ skipping 94 matching lines @@
     fprintf(stderr, "===========================\n");
 
     for (unsigned i = 0; i < NodeTypeEnd; ++i)
         fprintf(stderr, "%d: %d\n", i, s_nodeCount[i]);
 
     fprintf(stderr, "===========================\n\n\n");
 }
 
 #endif // DEBUG_AUDIONODE_REFERENCES
 
+void AudioNode::trace(Visitor* visitor)
+{
+    visitor->trace(m_context);
+}
+
+#if ENABLE(OILPAN)
+void AudioNode::clearKeepAlive()
+{
+    // It is safe to drop the self-persistent when the ref count
+    // of a AudioNode reaches zero. At that point, the
+    // AudioNode node is removed from the AudioContext and
+    // it cannot be reattached. Therefore, the reference count
+    // will not go above zero again.
+    ASSERT(m_keepAlive);
+    m_keepAlive = nullptr;
+}
+#endif
+
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)