VideoPortReadPortBufferUlong function (video.h)

The VideoPortReadPortBufferUlong function reads a number of ULONG values from a mapped I/O port and writes them into a buffer.

Syntax

VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortReadPortBufferUlong(
        PULONG Port,
  [out] PULONG Buffer,
        ULONG  Count
);

Parameters

Port

Pointer to the I/O port. The given Port must be in a mapped I/O-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 VideoPortReadPortBufferUlong.

Callers of VideoPortReadPortBufferUlong can be running at any IRQL, provided that the memory pointed to by the Buffer parameter is resident and that pointed to by the Port 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

HwVidInterrupt

HwVidSynchronizeExecutionCallback

VideoPortGetDeviceBase