void mutex_lock(smx_mutex_t mutex) [[block]];
int mutex_trylock(smx_mutex_t mutex);
+void mutex_unlock(smx_mutex_t mutex);
smx_cond_t cond_init() [[nohandler]];
void cond_signal(smx_cond_t cond) [[nohandler]];
void cond_wait_timeout(smx_cond_t cond, smx_mutex_t mutex, double timeout) [[block]];
void cond_broadcast(smx_cond_t cond) [[nohandler]];
-smx_sem_t sem_init(unsigned int capacity) [[nohandler]];
-void sem_release(smx_sem_t sem);
-int sem_would_block(smx_sem_t sem);
void sem_acquire(smx_sem_t sem) [[block]];
void sem_acquire_timeout(smx_sem_t sem, double timeout) [[block]];
-int sem_get_capacity(smx_sem_t sem);
sg_size_t file_read(surf_file_t fd, sg_size_t size) [[block]];
sg_size_t file_write(surf_file_t fd, sg_size_t size) [[block]];