michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef PlayingRefChangeHandler_h__
michael@0: #define PlayingRefChangeHandler_h__
michael@0: 
michael@0: #include "nsThreadUtils.h"
michael@0: #include "AudioNodeStream.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class PlayingRefChangeHandler : public nsRunnable
michael@0: {
michael@0: public:
michael@0:   enum ChangeType { ADDREF, RELEASE };
michael@0:   PlayingRefChangeHandler(AudioNodeStream* aStream, ChangeType aChange)
michael@0:     : mStream(aStream)
michael@0:     , mChange(aChange)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   NS_IMETHOD Run()
michael@0:   {
michael@0:     nsRefPtr<AudioNode> node;
michael@0:     {
michael@0:       // No need to keep holding the lock for the whole duration of this
michael@0:       // function, since we're holding a strong reference to it, so if
michael@0:       // we can obtain the reference, we will hold the node alive in
michael@0:       // this function.
michael@0:       MutexAutoLock lock(mStream->Engine()->NodeMutex());
michael@0:       node = mStream->Engine()->Node();
michael@0:     }
michael@0:     if (node) {
michael@0:       if (mChange == ADDREF) {
michael@0:         node->MarkActive();
michael@0:       } else if (mChange == RELEASE) {
michael@0:         node->MarkInactive();
michael@0:       }
michael@0:     }
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   nsRefPtr<AudioNodeStream> mStream;
michael@0:   ChangeType mChange;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif
michael@0: