VideoPortReadRegisterBufferUlong function (video.h)
The VideoPortReadRegisterBufferUlong function reads a number of ULONG values from a mapped device memory range and writes them into a buffer.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortReadRegisterBufferUlong(
PULONG Register,
[out] PULONG Buffer,
ULONG Count
);
Parameters
Register
Pointer to the register. The given Register must be in a mapped memory-space range returned by VideoPortGetDeviceBase.
[out] Buffer
Pointer to a buffer into which the ULONG values are written.
Count
Specifies the number of ULONG values to be written to the buffer.
Return value
None
Remarks
The buffer must be large enough to contain at least the specified number of ULONG values.
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadRegisterBufferUlong.
Callers of VideoPortReadRegisterBufferUlong can be running at any IRQL, provided that the memory pointed to by the Buffer parameter is resident and that pointed to by the Register parameter is resident, mapped device memory.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
Target Platform | Desktop |
Header | video.h (include Video.h) |
Library | Videoprt.lib |
DLL | Videoprt.sys |
IRQL | See Remarks section. |
See also
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