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| void rad_mutex_init(pthread_mutex_t *mutex); | Initialize a mutex.abort() on failure.  | 
| void rad_mutex_enter(pthread_mutex_t *mutex); | Lock a  mutex. abort() on failure. | 
| void rad_mutex_exit(pthread_mutex_t *mutex); | Unlock a mutex. abort() on failure. | 
| void rad_cond_init(pthread_cond_t *cond); | Initialize a condition variable, cond. abort(), on failure. |