PTHREAD_MUTEX_ERRORCHECK
#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_ERRORCHECK
if (attr->m_type < PTHREAD_MUTEX_ERRORCHECK ||
case PTHREAD_MUTEX_ERRORCHECK:
case PTHREAD_MUTEX_ERRORCHECK:
PTHREAD_MUTEX_ERRORCHECK, /* M_SS2_ERRORCHECK */
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_ERRORCHECK);