print_stats
print_stats(bio_s_out, ctx);
print_stats(bio_s_out, SSL_get_SSL_CTX(con));
print_stats(io, SSL_get_SSL_CTX(con));
static void print_stats(BIO *bp, SSL_CTX *ctx);
if (pthread_create(&stat_thread, NULL, print_stats, NULL) == -1) {