The producer-consumer problem is a classic example of multi-thread/ multiprocess synchronization problem. In this code a producer produces a letter and puts it in a buffer and a consumer retrieves a letter and prints it. Compile and run the program as given below and EXPLAIN the output generated by the program

//---------------------------

#include

#include

#define BUFF_SIZE 20

char buffer[BUFF_SIZE];

int nextIn = 0;

int nextOut = 0;

void Put(char item)

{

buffer[nextIn] = item;

nextIn = (nextIn + 1) % BUFF_SIZE;

printf("Producing %c ... ", item);

}

void * Producer()

{

int i;

for(i = 0; i < 15; i++)

{

sleep(rand()%9);

Put((char)('A'+ i % 26));

}

}

void Get(char item)

{

item = buffer[nextOut];

nextOut = (nextOut + 1) % BUFF_SIZE;

printf("Consuming %c ... ", item);

}

void * Consumer()

{

int i;

char item;

for(i = 0; i < 15; i++)

{

sleep(rand()%4);

Get(item);

}

}

void main()

{

pthread_t pid, cid;

pthread_create(&pid, NULL, Producer, NULL);

pthread_create(&cid, NULL, Consumer, NULL);

pthread_join(pid, NULL);

pthread_join(cid, NULL);

}