int sthread_cond_signal(sthread_cond_t* cond);
int sthread_cond_broadcast(sthread_cond_t* cond);
int sthread_cond_wait(sthread_cond_t* cond, sthread_mutex_t* mutex);
+int sthread_cond_timedwait(sthread_cond_t* cond, sthread_mutex_t* mutex, const struct timespec* abs_timeout);
int sthread_cond_destroy(sthread_cond_t* cond);
typedef struct {