OVR_DeviceHandle.cpp
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00001 /************************************************************************************
00002 
00003 Filename    :   OVR_DeviceHandle.cpp
00004 Content     :   Implementation of device handle class
00005 Created     :   February 5, 2013
00006 Authors     :   Lee Cooper
00007 
00008 Copyright   :   Copyright 2013 Oculus VR, Inc. All Rights reserved.
00009 
00010 Use of this software is subject to the terms of the Oculus license
00011 agreement provided at the time of installation or download, or which
00012 otherwise accompanies this software in either electronic or hard copy form.
00013 
00014 *************************************************************************************/
00015 
00016 #include "OVR_DeviceHandle.h"
00017 
00018 #include "OVR_DeviceImpl.h"
00019 
00020 namespace OVR {
00021 
00022 //-------------------------------------------------------------------------------------
00023 // ***** DeviceHandle
00024 
00025 DeviceHandle::DeviceHandle(DeviceCreateDesc* impl) : pImpl(impl)
00026 {
00027     if (pImpl)
00028         pImpl->AddRef();
00029 }
00030 
00031 DeviceHandle::DeviceHandle(const DeviceHandle& src) : pImpl(src.pImpl)
00032 {
00033     if (pImpl)
00034         pImpl->AddRef();
00035 }    
00036 
00037 DeviceHandle::~DeviceHandle()
00038 {
00039     if (pImpl)
00040         pImpl->Release();
00041 }
00042 
00043 void DeviceHandle::operator = (const DeviceHandle& src)
00044 {
00045     if (src.pImpl)
00046         src.pImpl->AddRef();
00047     if (pImpl)
00048         pImpl->Release();
00049     pImpl = src.pImpl;
00050 }
00051 
00052 DeviceBase* DeviceHandle::GetDevice_AddRef() const
00053 { 
00054     if (pImpl && pImpl->pDevice)
00055     {
00056         pImpl->pDevice->AddRef();
00057         return pImpl->pDevice;
00058     }
00059     return NULL;
00060 }
00061 
00062 // Returns true, if the handle contains the same device ptr
00063 // as specified in the parameter.
00064 bool DeviceHandle::IsDevice(DeviceBase* pdev) const
00065 {
00066     return (pdev && pImpl && pImpl->pDevice) ? 
00067         pImpl->pDevice == pdev : false;
00068 }
00069 
00070 DeviceType  DeviceHandle::GetType() const
00071 {
00072     return pImpl ? pImpl->Type : Device_None;
00073 }
00074 
00075 bool DeviceHandle::GetDeviceInfo(DeviceInfo* info) const
00076 {
00077     return pImpl ? pImpl->GetDeviceInfo(info) : false;
00078 }
00079 bool DeviceHandle::IsAvailable() const
00080 {
00081     // This isn't "atomically safe", but the function only returns the
00082     // recent state that may change.
00083     return pImpl ? (pImpl->Enumerated && pImpl->pLock->pManager) : false;
00084 }
00085 
00086 bool DeviceHandle::IsCreated() const
00087 {
00088     return pImpl ? (pImpl->pDevice != 0) : false;
00089 }
00090 
00091 DeviceBase* DeviceHandle::CreateDevice()
00092 {       
00093     if (!pImpl)
00094         return 0;
00095     
00096     DeviceBase*            device = 0;
00097     Ptr<DeviceManagerImpl> manager= 0;
00098 
00099     // Since both manager and device pointers can only be destroyed during a lock,
00100     // hold it while checking for availability.
00101     // AddRef to manager so that it doesn't get released on us.
00102     {
00103         Lock::Locker deviceLockScope(pImpl->GetLock());
00104 
00105         if (pImpl->pDevice)
00106         {
00107             pImpl->pDevice->AddRef();
00108             return pImpl->pDevice;
00109         }
00110         manager = pImpl->GetManagerImpl();
00111     }
00112 
00113     if (manager)
00114     {
00115         if (manager->GetThreadId() != OVR::GetCurrentThreadId())
00116         {
00117             // Queue up a CreateDevice request. This fills in '&device' with AddRefed value,
00118             // or keep it at null.
00119             manager->GetThreadQueue()->PushCallAndWaitResult(
00120                 manager.GetPtr(), &DeviceManagerImpl::CreateDevice_MgrThread,
00121                 &device, pImpl, (DeviceBase*)0);
00122         }
00123         else
00124             device = manager->CreateDevice_MgrThread(pImpl, (DeviceBase*)0);
00125     }
00126     return device;
00127 }
00128 
00129 void DeviceHandle::Clear()
00130 {
00131     if (pImpl)
00132     {
00133         pImpl->Release();
00134         pImpl = 0;
00135     }
00136 }
00137 
00138 bool DeviceHandle::enumerateNext(const DeviceEnumerationArgs& args)
00139 {
00140     if (GetType() == Device_None)
00141         return false;
00142     
00143     Ptr<DeviceManagerImpl> managerKeepAlive;
00144     Lock::Locker           lockScope(pImpl->GetLock());
00145     
00146     DeviceCreateDesc* next = pImpl;
00147     // If manager was destroyed, we get removed from the list.
00148     if (!pImpl->pNext)
00149         return false;
00150 
00151     managerKeepAlive = next->GetManagerImpl();
00152     OVR_ASSERT(managerKeepAlive);
00153     
00154     do {
00155         next = next->pNext;
00156 
00157         if (managerKeepAlive->Devices.IsNull(next))
00158         {
00159             pImpl->Release();
00160             pImpl = 0;
00161             return false;
00162         }
00163 
00164     } while(!args.MatchRule(next->Type, next->Enumerated));
00165 
00166     next->AddRef();
00167     pImpl->Release();
00168     pImpl = next;
00169 
00170     return true;
00171 }
00172 
00173 } // namespace OVR
00174 


oculus_sdk
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autogenerated on Fri Aug 28 2015 11:53:10