pthread_once_t
pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
int pthread_once(pthread_once_t *, void (*) (void));
pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
static pthread_once_t openssl_configured = PTHREAD_ONCE_INIT;
static pthread_once_t crypto_init_once = PTHREAD_ONCE_INIT;
static pthread_once_t once = PTHREAD_ONCE_INIT;
static pthread_once_t loaded = PTHREAD_ONCE_INIT;
static pthread_once_t once = PTHREAD_ONCE_INIT;
static pthread_once_t once = PTHREAD_ONCE_INIT;
pthread_once_t once_control = PTHREAD_ONCE_INIT;