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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SENSORS_PROVIDER_IMPL_H_
#define CONTENT_BROWSER_SENSORS_PROVIDER_IMPL_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/observer_list_threadsafe.h"
#include "content/browser/sensors/sensors_provider.h"
template <typename T> struct DefaultSingletonTraits;
namespace sensors {
class ProviderImpl : public Provider {
public:
static ProviderImpl* GetInstance();
// Provider implementation
virtual void AddListener(content::SensorsListener* listener) OVERRIDE;
virtual void RemoveListener(content::SensorsListener* listener) OVERRIDE;
virtual void ScreenOrientationChanged(
content::ScreenOrientation change) OVERRIDE;
private:
friend struct DefaultSingletonTraits<ProviderImpl>;
ProviderImpl();
virtual ~ProviderImpl();
typedef ObserverListThreadSafe<content::SensorsListener> ListenerList;
scoped_refptr<ListenerList> listeners_;
DISALLOW_COPY_AND_ASSIGN(ProviderImpl);
};
} // namespace sensors
#endif // CONTENT_BROWSER_SENSORS_PROVIDER_IMPL_H_
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