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【哲学家就餐问题-(B)】接续第55题 (B) 引入初值为4的信号量semMax,①处填上“wait(semMax); wait(chopstick[i]); wait(chopstick[(i+1)mod 5]);”,②处填上“signal(chopstick[i]); signal(chopstick[(i+1)mod 5]); signal(semMax);”
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