gecko-dev/dom/power/WakeLock.h
Andrea Marchesini 51905450be Bug 868943 - HTMLMediaElement::mWakeLock has to be unlocked and not just set to null. r=jlebar
--HG--
rename : content/media/test/bug461281.ogg => content/html/content/test/wakelock.ogg
2013-05-07 10:54:16 -04:00

79 lines
2.2 KiB
C++

/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_power_WakeLock_h
#define mozilla_dom_power_WakeLock_h
#include "nsCOMPtr.h"
#include "nsIDOMWakeLock.h"
#include "nsIDOMEventListener.h"
#include "nsIObserver.h"
#include "nsString.h"
#include "nsWeakReference.h"
class nsIDOMWindow;
namespace mozilla {
namespace dom {
class ContentParent;
namespace power {
class WakeLock
: public nsIDOMMozWakeLock
, public nsIDOMEventListener
, public nsIObserver
, public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMMOZWAKELOCK
NS_DECL_NSIDOMEVENTLISTENER
NS_DECL_NSIOBSERVER
// Note: WakeLock lives for the lifetime of the document in order to avoid
// exposing GC behavior to pages. This means that
// |var foo = navigator.requestWakeLock('cpu'); foo = null;|
// doesn't unlock the 'cpu' resource.
WakeLock();
virtual ~WakeLock();
// Initialize this wake lock on behalf of the given window. Null windows are
// allowed; a lock without an associated window is always considered
// invisible.
nsresult Init(const nsAString &aTopic, nsIDOMWindow* aWindow);
// Initialize this wake lock on behalf of the given process. If the process
// dies, the lock is released. A wake lock initialized via this method is
// always considered visible.
nsresult Init(const nsAString &aTopic, ContentParent* aContentParent);
private:
void DoUnlock();
void DoLock();
void AttachEventListener();
void DetachEventListener();
bool mLocked;
bool mHidden;
// The ID of the ContentParent on behalf of whom we acquired this lock, or
// CONTENT_PROCESS_UNKNOWN_ID if this lock was acquired on behalf of the
// current process.
uint64_t mContentParentID;
nsString mTopic;
// window that this was created for. Weak reference.
nsWeakPtr mWindow;
};
} // namespace power
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_power_WakeLock_h