#include<stdio.h>
#include<pthread.h>
#include<semaphore.h>
#include<stdlib.h>
#include<time.h>


#define N 5
struct buffer
{
    int b[N];//bufferi
    sem_t empty,full;
    int in,out;
} buf;// emri gjeneral i struktures shiko tek sem_wait qyshj e kemi perdor

void *P()
{
    time_t seconds;
    seconds=time(NULL);
    int i=1;
    while(1)
    {
        sem_wait(&(buf.empty));
        buf.b[buf.in]=i;
        buf.in = (buf.in+1)%N;
        printf("\nProdhuesi:%d \t --- [%d]",i++,seconds/3600);
        sleep(1);
        sem_post(&(buf.full));
    }
}

void *C()
{
    int item;
    while(1)
    {
        sem_wait(&(buf.full));
        item = buf.b[buf.out];
        buf.out = (buf.out+1)%N;
        printf("\tKonsumuesi:%d ",item);
        sem_post(&(buf.empty));
    }
}

void main()
{
    pthread_t t1,t2;//t1 si prodhues,t2 si konsumues dmth threda per qito dyja

    sem_init(&(buf.empty),0,N);//0 dmth po pajtohet mu bo shared
    sem_init(&(buf.full),0,0);

    buf.in=0;
    buf.out=0;

    pthread_create(&t2,NULL,C,NULL);
    pthread_create(&t1,NULL,P,NULL);//qiky thread po kriojet per prodhuesin


    pthread_join(t1,NULL);
    pthread_join(t2,NULL);


}