WRITE_REGISTER_USHORT function (wdm.h)

The WRITE_REGISTER_USHORT routine dereferences the supplied pointer, inserts a memory barrier, and writes a USHORT value to the specified address.

Syntax

void WRITE_REGISTER_USHORT(
  [in] volatile USHORT *Register,
  [in] USHORT          Value
);

Parameters

[in] Register

Pointer to the register, which must be a mapped range in memory space.

[in] Value

Specifies a USHORT value to be written to the register.

Return value

None

Remarks

This routine inserts a memory barrier into your code. This barrier guarantees that every operation that appears in the source code before the call to this routine will complete before any operation that appears after the call.

For more info about memory barriers, see KeMemoryBarrier.

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

Requirements