5.4.2 Producer-Consumer with Monitors( 3/4) Hansen管程 ■ Hoare管程 acquire( 1. acquire( xwa1t()T1进入等待 xwaito) T1进入等待 T2进入管程|1.acu1re( T2进入管程|1. acquire() T2进入等待x.s1gna1( x. signal() T1恢复管程执行 T2退出管程1, release( 1. release()T1结束 T2恢复管程执行 T1恢复管程执行 1. release ( l. released)5.4.2 Producer-Consumer with Monitors（3/4) 19