fssh_acquire_sem_etc
#define acquire_sem_etc fssh_acquire_sem_etc
extern fssh_status_t fssh_acquire_sem_etc(fssh_sem_id id, int32_t count,
fssh_status_t status = fssh_acquire_sem_etc(lock->sem, FSSH_RW_MAX_READERS,
fssh_status_t status = fssh_acquire_sem_etc(lock->sem, 1,