SO tentativa trab 5

#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

#define NTHREAD 2

pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;

char *mensagem;

void* threadFunction(void* value){
    pthread_mutex_lock(&mtx);
    puts("thread: ");
    mensagem = (char) pthread_self();
    puts(mensagem);
    pthread_mutex_unlock(&mtx);
}


int main ()
{
    pthread_t threads[NTHREAD];
    printf("Comecando o programa threads1 ... \n");

    int i;
    for(i=0; i<NTHREAD; i++){
        pthread_create(&threads[i], NULL, threadFunction, NULL);
    }

    for(i=0; i<NTHREAD; i++){
        pthread_join(threads[i], NULL);
    }

    printf("Terminando o programa threads1 ... \n");
    system("ps -f");

    exit (0);
}