question: private boolean acquire ( ) { while ( true ) { int cnt = activeCnt . get ( ) ; if ( cnt == 0 ) { if ( log . isDebugEnabled ( ) ) log . debug ( "IPC IO not acquired (count was 0): " + this ) ; return false ; } if ( activeCnt . compareAndSet ( cnt , cnt + 1 ) ) { if ( log . isDebugEnabled ( ) ) log . debug ( "IPC IO acquired: " + this ) ; return true ; } } }
target:  Increases usage count for this instance.