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READ_PORT_ULONG function (ioaccess.h)

  • Article

The READ_PORT_ULONG routine reads a ULONG value from the specified port address.

Syntax

ULONG READ_PORT_ULONG(
  [in] PVOID Port
);

Parameters

[in] Port

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

Return value

READ_PORT_ULONG returns the ULONG value that is read from the specified port address.

Remarks

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

Requirements

Requirement Value
Minimum supported client Available starting with Windows 2000.
Target Platform Universal
Header ioaccess.h (include Wdm.h, Ntddk.h, Ntifs.h, Ioaccess.h, Miniport.h)
Library Hal.lib
IRQL Any level (see Remarks section)