older sol

#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <math.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>

pthread_mutex_t mutex;
pthread_cond_t cond;
int total = 0;

int retcode;

void* request(){
    long int numberToSleep;

    numberToSleep = (rand() % 30) + 1;

    printf("Tempo: %ld\n", numberToSleep);

    sleep(numberToSleep);

    pthread_mutex_lock(&mutex);
    total += numberToSleep;
    pthread_mutex_unlock(&mutex);

    pthread_exit(NULL);
}

void* timeout(){
    sleep(8);
    pthread_mutex_lock(&mutex);
    first = -1;
    pthread_cond_signal(&cond);
}

void* joiner(void* args){

}

int gateway(int num_replicas) {
    struct timeval now;
    struct timespec timeout;
    pthread_t pthreads[num_replicas];
    pthread_t threadTimeout;

    for (int i = 0; i < num_replicas; i++) {
        pthread_create(&pthreads[i], NULL, &request, NULL);
    }

   // pthread_create(threadTimeout, NULL, &timeout, NULL);

   for (int i = 0; i < num_replicas; i++) {
            pthread_join(pthreads[i], NULL);
    }

    pthread_mutex_lock(&mutex);
    gettimeofday(&now);
    printf("%d seconds\n", now.tv_sec);
    timeout.tv_sec = now.tv_sec + 15;
    timeout.tv_nsec = now.tv_usec * 1000;
    retcode = 0;
    while(total > 16) {
        retcode = pthread_cond_timedwait(&cond, &mutex, &timeout);
        if (retcode == ETIMEDOUT) {
            printf("Timeout 16s");
            total =  -1;
            pthread_mutex_unlock(&mutex);
        }
    }

    pthread_mutex_unlock(&mutex);

    printf("\nTempo Total: %d\n", total);
    return total;
}

int main(int argc, char *argv[]){
    int num_replicas;

    scanf("%d", &num_replicas);

    gateway(num_replicas);

    return 0;
}