diff options
| author | Brad Davis <[email protected]> | 2013-06-27 11:25:32 -0800 |
|---|---|---|
| committer | Brad Davis <[email protected]> | 2013-06-28 10:47:29 -0700 |
| commit | ebefcc885f74461cd0e3f19b5ae3622dc6cf6dbc (patch) | |
| tree | 2b16db7350fce54c2e6c1b1c4020d67419cb1164 /LibOVR/Src/OVR_Win32_DeviceStatus.h | |
| parent | 0ade748e1845694c5cbe562fb823e56f09773e27 (diff) | |
SDK 0.2.2
Diffstat (limited to 'LibOVR/Src/OVR_Win32_DeviceStatus.h')
| -rw-r--r-- | LibOVR/Src/OVR_Win32_DeviceStatus.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/LibOVR/Src/OVR_Win32_DeviceStatus.h b/LibOVR/Src/OVR_Win32_DeviceStatus.h new file mode 100644 index 0000000..820e3a5 --- /dev/null +++ b/LibOVR/Src/OVR_Win32_DeviceStatus.h @@ -0,0 +1,101 @@ +/************************************************************************************
+
+Filename : OVR_Win32_DeviceStatus.h
+Content : Win32-specific DeviceStatus header.
+Created : January 24, 2013
+Authors : Lee Cooper
+
+Copyright : Copyright 2013 Oculus VR, Inc. All Rights reserved.
+
+Use of this software is subject to the terms of the Oculus license
+agreement provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+*************************************************************************************/
+
+#ifndef OVR_Win32_DeviceStatus_h
+#define OVR_Win32_DeviceStatus_h
+
+#include <windows.h>
+#include "Kernel/OVR_String.h"
+#include "Kernel/OVR_RefCount.h"
+#include "Kernel/OVR_Array.h"
+
+namespace OVR { namespace Win32 {
+
+//-------------------------------------------------------------------------------------
+// ***** DeviceStatus
+//
+// DeviceStatus abstracts the handling of windows messages of interest for
+// example the WM_DEVICECHANGED message which occurs when a device is plugged/unplugged.
+// The device manager thread creates an instance of this class and passes its pointer
+// in the constructor. That thread is also responsible for periodically calling 'ProcessMessages'
+// to process queued windows messages. The client is notified via the 'OnMessage' method
+// declared in the 'DeviceMessages::Notifier' interface.
+class DeviceStatus : public RefCountBase<DeviceStatus>
+{
+public:
+
+ // Notifier used for device messages.
+ class Notifier
+ {
+ public:
+ enum MessageType
+ {
+ DeviceAdded = 0,
+ DeviceRemoved = 1,
+ };
+
+ virtual bool OnMessage(MessageType type, const String& devicePath)
+ { OVR_UNUSED2(type, devicePath); return true; }
+ };
+
+ DeviceStatus(Notifier* const pClient);
+ ~DeviceStatus();
+
+ void operator = (const DeviceStatus&); // No assignment implementation.
+
+ bool Initialize();
+ void ShutDown();
+
+ void ProcessMessages();
+
+private:
+ enum
+ {
+ MaxUSBRecoveryAttempts = 20,
+ USBRecoveryTimeInterval = 500 // ms
+ };
+ struct RecoveryTimerDesc
+ {
+ UINT_PTR TimerId;
+ String DevicePath;
+ unsigned NumAttempts;
+ };
+
+ static LRESULT CALLBACK WindowsMessageCallback( HWND hwnd,
+ UINT message,
+ WPARAM wParam,
+ LPARAM lParam);
+
+ bool MessageCallback(WORD messageType, const String& devicePath);
+
+ void CleanupRecoveryTimer(UPInt index);
+ RecoveryTimerDesc* FindRecoveryTimer(UINT_PTR timerId, UPInt* pindex);
+ void FindAndCleanupRecoveryTimer(const String& devicePath);
+
+private: // data
+ Notifier* const pNotificationClient; // Don't reference count a back-pointer.
+
+ HWND hMessageWindow;
+ HDEVNOTIFY hDeviceNotify;
+
+ UINT_PTR LastTimerId;
+ Array<RecoveryTimerDesc> RecoveryTimers;
+
+ GUID HidGuid;
+};
+
+}} // namespace OVR::Win32
+
+#endif // OVR_Win32_DeviceStatus_h
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