READ_PORT_BUFFER_ULONG function (wdm.h)

The READ_PORT_BUFFER_ULONG routine reads a number of ULONG values from the specified port address into a buffer.

Syntax

NTHALAPI VOID READ_PORT_BUFFER_ULONG(
  [in]  PULONG Port,
  [out] PULONG Buffer,
  [in]  ULONG  Count
);

Parameters

[in] Port

Specifies the port address, which must be a mapped memory range in I/O space.

[out] Buffer

Pointer to a buffer into which an array of ULONG values is read.

[in] Count

Specifies the number of ULONG values to be read into the buffer.

Return value

None

Remarks

The size of the buffer must be large enough to contain at least the specified number of ULONG values.

Callers of READ_PORT_BUFFER_ULONG can be running at any IRQL, assuming the Buffer is resident and the Port is resident, mapped device memory.

Requirements