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//所需信号量及锁变量题干已提供，不重复写出

void consumerC1(){

while (true){

if(fullB>0){

P(mutex);fullB--;

V(emptyB);

V(mutex);

int wait=2;

while(wait-->0);

}

}

}

void consumerC1(){

while (true){

if(fullA>0){

P(mutex);fullA--;

V(emptyA);

V(mutex);

int wait=1;

while(wait-->0);

}

}

}

void produceP2(){

while(true){

if emptyB<2{

int i = 1;

while(i-->0);//等待一时间单位

P(mutex);

p(emptyB);

fullB++;

V(mutex);

}

}

}

 

void produceP1(){

while(true){

if emptyA<2{

int i = 2;

while(i-->0);//等待两时间单位

P(mutex);

p(emptyA);

fullA++;

V(mutex);

}

}

}

耗时7单位

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