question: private int awaitWork ( WorkQueue w ) { int stat = 0 ; if ( w != null && w . scanState < 0 ) { long c = ctl ; if ( ( int ) ( c > > AC_SHIFT ) + ( config & SMASK ) <= 0 ) stat = timedAwaitWork ( w , c ) ; else if ( ( runState & STOP ) != 0 ) stat = w . qlock = - 1 ; else if ( w . scanState < 0 ) { w . parker = Thread . currentThread ( ) ; if ( w . scanState < 0 ) LockSupport . park ( this ) ; w . parker = null ; if ( ( runState & STOP ) != 0 ) stat = w . qlock = - 1 ; else if ( w . scanState < 0 ) Thread . interrupted ( ) ; } } return stat ; }
target:  Possibly blocks worker w waiting for signal, or returns negative status if the worker should terminate. May return without status change if multiple stale unparks and/or interrupts occur.