Function sys_ksem_trywait

freebsd/kern/uipc_sem.c:800–805

};
#endif
int
sys_ksem_trywait(struct thread *td, struct ksem_trywait_args *uap)
{

	return (kern_sem_wait(td, uap->id, 1, NULL));
}

static int
kern_sem_wait(struct thread *td, semid_t id, int tryflag,