зеркало из https://github.com/mozilla/gecko-dev.git
62 строки
1.7 KiB
C++
62 строки
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set sw=2 ts=8 et ft=cpp : */
|
|
/* 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_DeviceChangeCallback_h
|
|
#define mozilla_DeviceChangeCallback_h
|
|
|
|
namespace mozilla {
|
|
|
|
class DeviceChangeCallback
|
|
{
|
|
public:
|
|
virtual void OnDeviceChange()
|
|
{
|
|
MutexAutoLock lock(mCallbackMutex);
|
|
for (DeviceChangeCallback* observer : mDeviceChangeCallbackList)
|
|
{
|
|
observer->OnDeviceChange();
|
|
}
|
|
}
|
|
|
|
virtual int AddDeviceChangeCallback(DeviceChangeCallback* aCallback)
|
|
{
|
|
MutexAutoLock lock(mCallbackMutex);
|
|
if (mDeviceChangeCallbackList.IndexOf(aCallback) == mDeviceChangeCallbackList.NoIndex)
|
|
mDeviceChangeCallbackList.AppendElement(aCallback);
|
|
return 0;
|
|
}
|
|
|
|
virtual int RemoveDeviceChangeCallback(DeviceChangeCallback* aCallback)
|
|
{
|
|
MutexAutoLock lock(mCallbackMutex);
|
|
return RemoveDeviceChangeCallbackLocked(aCallback);
|
|
}
|
|
|
|
virtual int RemoveDeviceChangeCallbackLocked(DeviceChangeCallback* aCallback)
|
|
{
|
|
mCallbackMutex.AssertCurrentThreadOwns();
|
|
if (mDeviceChangeCallbackList.IndexOf(aCallback) != mDeviceChangeCallbackList.NoIndex)
|
|
mDeviceChangeCallbackList.RemoveElement(aCallback);
|
|
return 0;
|
|
}
|
|
|
|
DeviceChangeCallback() : mCallbackMutex("mozilla::media::DeviceChangeCallback::mCallbackMutex")
|
|
{
|
|
}
|
|
|
|
virtual ~DeviceChangeCallback()
|
|
{
|
|
}
|
|
|
|
protected:
|
|
nsTArray<DeviceChangeCallback*> mDeviceChangeCallbackList;
|
|
Mutex mCallbackMutex;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_DeviceChangeCallback_h
|