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-/************************************************************************************
-
-PublicHeader: OVR.h
-Filename : OVR_DeviceHandle.h
-Content : Handle to a device that was enumerated
-Created : February 5, 2013
-Authors : Lee Cooper
-
-Copyright : Copyright 2014 Oculus VR, Inc. All Rights reserved.
-
-Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License");
-you may not use the Oculus VR Rift SDK except in compliance with the License,
-which is provided at the time of installation or download, or which
-otherwise accompanies this software in either electronic or hard copy form.
-
-You may obtain a copy of the License at
-
-http://www.oculusvr.com/licenses/LICENSE-3.1
-
-Unless required by applicable law or agreed to in writing, the Oculus VR SDK
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-*************************************************************************************/
-
-#ifndef OVR_DeviceHandle_h
-#define OVR_DeviceHandle_h
-
-#include "OVR_DeviceConstants.h"
-
-namespace OVR {
-
-class DeviceBase;
-class DeviceInfo;
-
-// Internal
-class DeviceCreateDesc;
-class DeviceEnumerationArgs;
-
-
-//-------------------------------------------------------------------------------------
-// ***** DeviceHandle
-
-// DeviceHandle references a specific device that was enumerated; it can be assigned
-// directly from DeviceEnumerator.
-//
-// Devices represented by DeviceHandle are not necessarily created or available.
-// A device may become unavailable if, for example, it its unplugged. If the device
-// is available, it can be created by calling CreateDevice.
-//
-
-class DeviceHandle
-{
- friend class DeviceManager;
- friend class DeviceManagerImpl;
- template<class B> friend class HIDDeviceImpl;
-
-public:
- DeviceHandle() : pImpl(0) { }
- DeviceHandle(const DeviceHandle& src);
- ~DeviceHandle();
-
- void operator = (const DeviceHandle& src);
-
- bool operator == (const DeviceHandle& other) const { return pImpl == other.pImpl; }
- bool operator != (const DeviceHandle& other) const { return pImpl != other.pImpl; }
-
- // operator bool() returns true if Handle/Enumerator points to a valid device.
- operator bool () const { return GetType() != Device_None; }
-
- // Returns existing device, or NULL if !IsCreated. The returned ptr is
- // addref-ed.
- DeviceBase* GetDevice_AddRef() const;
- DeviceType GetType() const;
- bool GetDeviceInfo(DeviceInfo* info) const;
- bool IsAvailable() const;
- bool IsCreated() const;
- // Returns true, if the handle contains the same device ptr
- // as specified in the parameter.
- bool IsDevice(DeviceBase*) const;
-
- // Creates a device, or returns AddRefed pointer if one is already created.
- // New devices start out with RefCount of 1.
- DeviceBase* CreateDevice();
-
- // Creates a device, or returns AddRefed pointer if one is already created.
- // New devices start out with RefCount of 1. DeviceT is used to cast the
- // DeviceBase* to a concreete type.
- template <class DeviceT>
- DeviceT* CreateDeviceTyped() const
- {
- return static_cast<DeviceT*>(DeviceHandle(*this).CreateDevice());
- }
-
- // Resets the device handle to uninitialized state.
- void Clear();
-
-protected:
- explicit DeviceHandle(DeviceCreateDesc* impl);
- bool enumerateNext(const DeviceEnumerationArgs& args);
- DeviceCreateDesc* pImpl;
-};
-
-} // namespace OVR
-
-#endif