[理工] [OS]-The sleeping Barber problem

[lovefo (lovefo)]

我筆記這部分的程式碼 寫的亂亂的(朋友給的)
所以 不太確定正確性 希望大家能幫我看看有沒有錯..

Customer :semaphore = 0

Barber   :semaphore = 0

waiting  :int       = 0

mutex    :int       = 0


Barber 程式片段:
repeat:
       wait(Customer);
       wait(mutex);
       waiting = waiting - 1;
       signal(Barber);
       signal(mutex);
       cut-hair();
until False

Customer 程式片段:
       wait(mutex);
       if(waiting<n) then
         {
              waiting = waiting + 1;
              signal(Customer);
              signal(mutex);
              wait(Barber);
              get-haircut();
         }
       else
         signal(mutex);

這樣對嗎?
因為剩這幾個還沒背..
怕背錯

--
一切....
似乎不再那麼重要....

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 114.46.164.114
推 harry5438:YES