question: public boolean acquire ( ) { int [ ] stamp = new int [ 1 ] ; while ( true ) { boolean undeployed = usage . get ( stamp ) ; int r = stamp [ 0 ] ; if ( undeployed && r == 0 ) return false ; if ( usage . compareAndSet ( undeployed , undeployed , r , r + 1 ) ) return true ; } }
target:  Increments usage count for deployment. If deployment is undeployed, then usage count is not incremented.