VideoPortReadRegisterBufferUlong function

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

Syntax


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.

Buffer [out]

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

Target platform

Desktop

Version

Available in Windows 2000 and later versions of the Windows operating systems.

Header

Video.h (include Video.h)

Library

Videoprt.lib

DLL

Videoprt.sys

IRQL

See Remarks section.

See also

HwVidInterrupt
HwVidSynchronizeExecutionCallback
VideoPortGetDeviceBase

 

 

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