#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/shm.h>
#include <string.h>
#include <sys/sem.h>
#include "semafori.h"

#define SHM_KEY (key_t)1234
#define SEM_KEYR (key_t)5678
#define SEM_KEYW (key_t)9012


struct DataCondivisa {
    int intero;
    float reale;
};

int main(void){
    int running= 1;
    unsigned int count=0;
    void * ShmP= (void *)0;
    struct DataCondivisa *p;
    int ShmID;
    int WriteID, ReadID;

    WriteID= semget(SEM_KEYW, 1, 0666 | IPC_CREAT);
    if (WriteID==-1){
        perror("Errore dio ca\n");
        exit(EXIT_FAILURE);
    }
    ReadID= semget(SEM_KEYR, 1, 0666 | IPC_CREAT);
    if (ReadID==-1){
        perror("Errore dio ca\n");
        exit(EXIT_FAILURE);
    }
    ShmID= semget(SHM_KEY, sizeof(struct DataCondivisa), 0666 | IPC_CREAT);
    if (ShmID==-1){
        perror("Errore dio ca\n");
        exit(EXIT_FAILURE);
    }

    ShmP=shmat(ShmID, (void *)0, 0);
    if (ShmP== (void *)-1) {
        perror("Hai sbagliato orca madò\n");
        exit(EXIT_FAILURE);
    }


    p=(struct DataCondivisa *) ShmP;
    printf("La memoria si attacca al cazzo %d %f\n", p->intero, p->reale);

    while(running) {
        if(SEM_P(WriteID)==-1) exit (EXIT_FAILURE);
        printf("Inserisci un numero intero positivo oppure uno negativo per terminare\n");
        scanf("%d", &p->intero);
        if(p->intero<0){
            running=0;
        }else {
            printf("Inserisci un numero reale\n");
            scanf("%f", &p->reale);
        }
        if (SEM_V(ReadID)==-1) exit(EXIT_FAILURE);
    }
    if (shmdt(ShmP) ==-1){
        perror("Errore dio ca\n");
        exit (EXIT_FAILURE);
    }
    exit (EXIT_SUCCESS);
}