VideoPortReadRegisterBufferUlong function

The VideoPortReadRegisterBufferUlong function reads a number of ULONG values from a mapped device memory range and writes them into a buffer.

Syntax

VIDEOPORT_API VOID VideoPortReadRegisterBufferUlong(
  PULONG Register,
  PULONG Buffer,
  ULONG  Count
);

Parameters

Register

Pointer to the register. The given Register must be in a mapped memory-space range returned by VideoPortGetDeviceBase.

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

   
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

HwVidInterrupt

HwVidSynchronizeExecutionCallback

VideoPortGetDeviceBase