Source position: systemh.inc line 1591
function AtomicDecrement(
var Target: LongInt
):LongInt;function AtomicDecrement(
var Target: Int64
):Int64;function AtomicDecrement(
var Target: pointer
):pointer;function AtomicDecrement(
var Target: Cardinal
):Cardinal;function AtomicDecrement(
var Target: QWord
):QWord;