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VideoPortReadPortBufferUshort function

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

Syntax


VOID VideoPortReadPortBufferUshort(
        PUSHORT Port,
  _Out_ PUSHORT Buffer,
        ULONG   Count
);

Parameters

Port

Pointer to the port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.

Buffer [out]

Pointer to a buffer into which an array of USHORT values is written.

Count

Specifies the number of USHORT 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 USHORT values.

A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadPortBufferUshort.

Callers of VideoPortReadPortBufferUshort 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

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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