WinUsb_GetCurrentFrameNumber routine
The WinUsb_GetCurrentFrameNumber function gets the current frame number for the bus.
Syntax
BOOL __stdcall WinUsb_GetCurrentFrameNumber( _In_ HANDLE DeviceHandle, _Out_ PULONG CurrentFrameNumber, _Out_ LARGE_INTEGER *TimeStamp );
Parameters
- DeviceHandle [in]
-
The handle to the device that CreateFile returned.
- CurrentFrameNumber [out]
-
The current frame number value.
- TimeStamp [out]
-
The time stamp value when the current frame was read.
Return value
WinUsb_GetCurrentFrameNumber returns TRUE if the operation succeeds. Otherwise this function returns FALSE, and the caller can retrieve the logged error by calling GetLastError.
Remarks
The caller may compare the PerformanceCount with the value returned by the Win32 function QueryPerformanceCounter to determine if there has been a delay in transitioning back to user-mode after the frame number was read. The caller can then adjust the starting frame number as needed.
Requirements
|
Minimum supported client | Windows 8.1 |
|---|---|
|
Minimum supported server | Windows Server 2012 R2 |
|
Header |
|
|
Library |
|
See also
Send comments about this topic to Microsoft
Build date: 12/5/2013