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Producer and Consumer
#include
#include
int mutex=1,full=0,empty=3,x=0;
void main()
{
int n;
void producer();
void consumer();
int wait(int);
int signal(int);
clrscr();
printf("list of choices :\n1.producer \n2.consumer \n3.exit");
while(1)
{
printf("\n\n enter the choice:");
scanf("%d",&n);
switch(n)
{
case 1:
if((mutex==1)&&empty!=0)
producer();
else
printf("\n buffer is full");
break;
case 2:
if((mutex==1)&&full!=0)
consumer();
else
printf("\n buffer is empty");
break;
case 3:
exit(0);
break;
}
}
}
int wait(int s)
{
return(--s);
}
int signal(int s)
{
return(++s);
}
void producer()
{
mutex=wait(mutex);
full=signal(full);
empty=wait(empty);
x++;
printf("\n producer produces the item %d:",x);
mutex=signal(mutex);
}
void consumer()
{
mutex=wait(mutex);
full=wait(full);
empty=signal(empty);
printf("\n consumer consumes an item %d:",x);
x--;
mutex=signal(mutex);
}
OUTPUT:
enter the choice:1
producer produces the item 3:
enter the choice:1
buffer is full
enter the choice:2
consumer consumes an item 3:
enter the choice:2
consumer consumes an item 2:
enter the choice:2
consumer consumes an item 1:
enter the choice:2
buffer is empty
enter the choice:3
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