VOID
RtlConvertExclusiveToShared(
  IN  PRTL_RESOURCE Resource
  );

Routine Description:

    This routine converts a resource acquired for exclusive access into
    one acquired for shared access.  Upon return from the procedure
    the resource is acquired for shared access

Arguments:

    Resource - Supplies the resource to acquire for shared access, it
        must already be acquired for exclusive access

Return Value:

    None