Ese 2 Mutex

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

int glob=0;
long somma=0;
int finito=0;
pthread_mutex_t mut1=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mut2=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mut3=PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond_controllo=PTHREAD_COND_INITIALIZER;
pthread_cond_t cond_fine=PTHREAD_COND_INITIALIZER;
void *genera ()
{
    int i;
    for(i=0;i<1000;i++)
    {
        pthread_mutex_lock(&mut1);
        glob++;
        somma+=i;
        printf("\nValore di glob = %d",glob);
        pthread_cond_signal(&cond_controllo);
        pthread_mutex_unlock(&mut1);
        pthread_mutex_lock(&mut2);
            if(finito==1)
            {
                pthread_mutex_unlock(&mut2);
                pthread_exit(0);
            }
        pthread_mutex_unlock(&mut2);

    }
}
void *controlla(void *arg)
{
    int *n_ptr=(int *)arg;
    int n=*n_ptr;
    while(1)
    {
    pthread_mutex_lock(&mut2);
    pthread_cond_wait(&cond_controllo,&mut2);
    pthread_mutex_unlock(&mut2);
    pthread_mutex_lock(&mut1);
    pthread_mutex_lock(&mut2);
    printf("\nSONO PASSATO!!\n");
    if(glob>=n)
        {
            finito=1;
            pthread_mutex_unlock(&mut1);
            pthread_mutex_unlock(&mut2);
            pthread_cond_signal(&cond_fine);
            pthread_exit(0);

        }
    pthread_mutex_unlock(&mut1);
    pthread_mutex_unlock(&mut2);
    }

}

int main(int argc,char **argv)
{
    int i,n=atoi(argv[1]);
    ///Creo i 3 Thread
    pthread_t t1,t2,t3;
    pthread_create(&t1,NULL,genera,NULL);
    pthread_create(&t2,NULL,genera,NULL);
    pthread_create(&t3,NULL,controlla,&n);
    pthread_mutex_lock(&mut3);
    pthread_cond_wait(&cond_fine,&mut3);
    pthread_mutex_unlock(&mut3);
    pthread_join(t1,NULL);
    pthread_join(t2,NULL);
    pthread_join(t3,NULL);
    printf("\nValore di glob = %d, limite = %d",glob,n);
}