Function semaphore_create

user/src/sync.rs:15–17

(res_count: usize)

    sys_mutex_unlock(mutex_id);
}
pub fn semaphore_create(res_count: usize) -> isize {
    sys_semaphore_create(res_count)
}
pub fn semaphore_up(sem_id: usize) {
    sys_semaphore_up(sem_id);
}