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annotate libovr/Src/win32/OVR_Win32_DeviceManager.h @ 12:d797639e0234

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moving on to the distortion... not correct yet
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 20 Sep 2013 10:14:29 +0300
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nuclear@1 1 /************************************************************************************
nuclear@1 2
nuclear@1 3 Filename : OVR_Win32_DeviceManager.h
nuclear@1 4 Content : Win32-specific DeviceManager header.
nuclear@1 5 Created : September 21, 2012
nuclear@1 6 Authors : Michael Antonov
nuclear@1 7
nuclear@1 8 Copyright : Copyright 2012 Oculus VR, Inc. All Rights reserved.
nuclear@1 9
nuclear@1 10 Use of this software is subject to the terms of the Oculus license
nuclear@1 11 agreement provided at the time of installation or download, or which
nuclear@1 12 otherwise accompanies this software in either electronic or hard copy form.
nuclear@1 13
nuclear@1 14 *************************************************************************************/
nuclear@1 15
nuclear@1 16 #ifndef OVR_Win32_DeviceManager_h
nuclear@1 17 #define OVR_Win32_DeviceManager_h
nuclear@1 18
nuclear@1 19 #include "OVR_DeviceImpl.h"
nuclear@1 20 #include "OVR_Win32_DeviceStatus.h"
nuclear@1 21
nuclear@1 22 #include "Kernel/OVR_Timer.h"
nuclear@1 23
nuclear@1 24
nuclear@1 25 namespace OVR { namespace Win32 {
nuclear@1 26
nuclear@1 27 class DeviceManagerThread;
nuclear@1 28
nuclear@1 29 //-------------------------------------------------------------------------------------
nuclear@1 30 // ***** Win32 DeviceManager
nuclear@1 31
nuclear@1 32 class DeviceManager : public DeviceManagerImpl
nuclear@1 33 {
nuclear@1 34 public:
nuclear@1 35 DeviceManager();
nuclear@1 36 ~DeviceManager();
nuclear@1 37
nuclear@1 38 // Initialize/Shutdowncreate and shutdown manger thread.
nuclear@1 39 virtual bool Initialize(DeviceBase* parent);
nuclear@1 40 virtual void Shutdown();
nuclear@1 41
nuclear@1 42 virtual ThreadCommandQueue* GetThreadQueue();
nuclear@1 43 virtual ThreadId GetThreadId() const;
nuclear@1 44
nuclear@1 45 virtual DeviceEnumerator<> EnumerateDevicesEx(const DeviceEnumerationArgs& args);
nuclear@1 46
nuclear@1 47 virtual bool GetDeviceInfo(DeviceInfo* info) const;
nuclear@1 48
nuclear@1 49 // Fills HIDDeviceDesc by using the path.
nuclear@1 50 // Returns 'true' if successful, 'false' otherwise.
nuclear@1 51 bool GetHIDDeviceDesc(const String& path, HIDDeviceDesc* pdevDesc) const;
nuclear@1 52
nuclear@1 53 Ptr<DeviceManagerThread> pThread;
nuclear@1 54 };
nuclear@1 55
nuclear@1 56 //-------------------------------------------------------------------------------------
nuclear@1 57 // ***** Device Manager Background Thread
nuclear@1 58
nuclear@1 59 class DeviceManagerThread : public Thread, public ThreadCommandQueue, public DeviceStatus::Notifier
nuclear@1 60 {
nuclear@1 61 friend class DeviceManager;
nuclear@1 62 enum { ThreadStackSize = 32 * 1024 };
nuclear@1 63 public:
nuclear@1 64 DeviceManagerThread(DeviceManager* pdevMgr);
nuclear@1 65 ~DeviceManagerThread();
nuclear@1 66
nuclear@1 67 virtual int Run();
nuclear@1 68
nuclear@1 69 // ThreadCommandQueue notifications for CommandEvent handling.
nuclear@1 70 virtual void OnPushNonEmpty_Locked() { ::SetEvent(hCommandEvent); }
nuclear@1 71 virtual void OnPopEmpty_Locked() { ::ResetEvent(hCommandEvent); }
nuclear@1 72
nuclear@1 73
nuclear@1 74 // Notifier used for different updates (EVENT or regular timing or messages).
nuclear@1 75 class Notifier
nuclear@1 76 {
nuclear@1 77 public:
nuclear@1 78 // Called when overlapped I/O handle is signaled.
nuclear@1 79 virtual void OnOverlappedEvent(HANDLE hevent) { OVR_UNUSED1(hevent); }
nuclear@1 80
nuclear@1 81 // Called when timing ticks are updated.
nuclear@1 82 // Returns the largest number of microseconds this function can
nuclear@1 83 // wait till next call.
nuclear@1 84 virtual UInt64 OnTicks(UInt64 ticksMks)
nuclear@1 85 { OVR_UNUSED1(ticksMks); return Timer::MksPerSecond * 1000; }
nuclear@1 86
nuclear@1 87 enum DeviceMessageType
nuclear@1 88 {
nuclear@1 89 DeviceMessage_DeviceAdded = 0,
nuclear@1 90 DeviceMessage_DeviceRemoved = 1,
nuclear@1 91 };
nuclear@1 92
nuclear@1 93 // Called to notify device object.
nuclear@1 94 virtual bool OnDeviceMessage(DeviceMessageType messageType,
nuclear@1 95 const String& devicePath,
nuclear@1 96 bool* error)
nuclear@1 97 { OVR_UNUSED3(messageType, devicePath, error); return false; }
nuclear@1 98 };
nuclear@1 99
nuclear@1 100
nuclear@1 101 // Adds device's OVERLAPPED structure for I/O.
nuclear@1 102 // After it's added, Overlapped object will be signaled if a message arrives.
nuclear@1 103 bool AddOverlappedEvent(Notifier* notify, HANDLE hevent);
nuclear@1 104 bool RemoveOverlappedEvent(Notifier* notify, HANDLE hevent);
nuclear@1 105
nuclear@1 106 // Add notifier that will be called at regular intervals.
nuclear@1 107 bool AddTicksNotifier(Notifier* notify);
nuclear@1 108 bool RemoveTicksNotifier(Notifier* notify);
nuclear@1 109
nuclear@1 110 bool AddMessageNotifier(Notifier* notify);
nuclear@1 111 bool RemoveMessageNotifier(Notifier* notify);
nuclear@1 112
nuclear@1 113 // DeviceStatus::Notifier interface.
nuclear@1 114 bool OnMessage(MessageType type, const String& devicePath);
nuclear@1 115
nuclear@1 116 void DetachDeviceManager();
nuclear@1 117
nuclear@1 118 private:
nuclear@1 119 bool threadInitialized() { return hCommandEvent != 0; }
nuclear@1 120
nuclear@1 121 // Event used to wake us up thread commands are enqueued.
nuclear@1 122 HANDLE hCommandEvent;
nuclear@1 123
nuclear@1 124 // Event notifications for devices whose OVERLAPPED I/O we service.
nuclear@1 125 // This list is modified through AddDeviceOverlappedEvent.
nuclear@1 126 // WaitHandles[0] always == hCommandEvent, with null device.
nuclear@1 127 Array<HANDLE> WaitHandles;
nuclear@1 128 Array<Notifier*> WaitNotifiers;
nuclear@1 129
nuclear@1 130 // Ticks notifiers - used for time-dependent events such as keep-alive.
nuclear@1 131 Array<Notifier*> TicksNotifiers;
nuclear@1 132
nuclear@1 133 // Message notifiers.
nuclear@1 134 Array<Notifier*> MessageNotifiers;
nuclear@1 135
nuclear@1 136 // Object that manages notifications originating from Windows messages.
nuclear@1 137 Ptr<DeviceStatus> pStatusObject;
nuclear@1 138
nuclear@1 139 Lock DevMgrLock;
nuclear@1 140 // pDeviceMgr should be accessed under DevMgrLock
nuclear@1 141 DeviceManager* pDeviceMgr; // back ptr, no addref.
nuclear@1 142 };
nuclear@1 143
nuclear@1 144 }} // namespace Win32::OVR
nuclear@1 145
nuclear@1 146 #endif // OVR_Win32_DeviceManager_h