1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/PlayingRefChangeHandler.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,56 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef PlayingRefChangeHandler_h__
1.11 +#define PlayingRefChangeHandler_h__
1.12 +
1.13 +#include "nsThreadUtils.h"
1.14 +#include "AudioNodeStream.h"
1.15 +
1.16 +namespace mozilla {
1.17 +namespace dom {
1.18 +
1.19 +class PlayingRefChangeHandler : public nsRunnable
1.20 +{
1.21 +public:
1.22 + enum ChangeType { ADDREF, RELEASE };
1.23 + PlayingRefChangeHandler(AudioNodeStream* aStream, ChangeType aChange)
1.24 + : mStream(aStream)
1.25 + , mChange(aChange)
1.26 + {
1.27 + }
1.28 +
1.29 + NS_IMETHOD Run()
1.30 + {
1.31 + nsRefPtr<AudioNode> node;
1.32 + {
1.33 + // No need to keep holding the lock for the whole duration of this
1.34 + // function, since we're holding a strong reference to it, so if
1.35 + // we can obtain the reference, we will hold the node alive in
1.36 + // this function.
1.37 + MutexAutoLock lock(mStream->Engine()->NodeMutex());
1.38 + node = mStream->Engine()->Node();
1.39 + }
1.40 + if (node) {
1.41 + if (mChange == ADDREF) {
1.42 + node->MarkActive();
1.43 + } else if (mChange == RELEASE) {
1.44 + node->MarkInactive();
1.45 + }
1.46 + }
1.47 + return NS_OK;
1.48 + }
1.49 +
1.50 +private:
1.51 + nsRefPtr<AudioNodeStream> mStream;
1.52 + ChangeType mChange;
1.53 +};
1.54 +
1.55 +}
1.56 +}
1.57 +
1.58 +#endif
1.59 +
