Function event_loop

lib_acl/src/event/events_kernel.c:657–817

}

static void event_loop(ACL_EVENT *eventp)
{
	const char *myname = "event_loop";
	EVENT_KERNEL *ev = (EVENT_KERNEL *) eventp;
	int   nready;
	acl_int64 delay, when;
	ACL_EVENT_FDTABLE *fdp;
	EVENT_BUFFER *bp;

	delay = eventp->delay_sec * 1000000 + eventp->delay_usec;
	if (delay < DELAY_MIN) {
		delay = DELAY_MIN;
	}

	/* �����¼������ʱ��� */

	SET_TIME(eventp->present);

	/* ���ݶ�ʱ����������������� epoll/kqueue/devpoll �ļ�ⳬʱ���� */

	when = event_timer_when(eventp);
	if (when > 0) {
		acl_int64 n = when - eventp->present;
		if (n <= 0) {
			delay = 0;
		} else if (n < delay) {
			delay = n;
		}
	}

	/* ���������ֶ����״̬������/ɾ��֮ǰ���õ������ֶ��� */

	event_set_all(eventp);

	if (eventp->fdcnt == 0) {
		if (eventp->ready_cnt == 0) {
			acl_doze(delay > DELAY_MIN ? (int) delay / 1000 : 10);
		}

		goto TAG_DONE;
	}

	/* ����Ѿ���������׼�������ⳬʱʱ���� 0 */

	if (eventp->ready_cnt > 0) {
		delay = 0;
	}

	/* ���� epoll/kquque/devpoll ϵͳ���ü����������� */

	EVENT_BUFFER_READ(nready, ev->event_fd, ev->event_buf,
		ev->event_fdslots, (int) (delay / 1000));

	if (eventp->nested++ > 0) {
		acl_msg_error("%s(%d): recursive call, nested: %d",
			myname, __LINE__, eventp->nested);
		exit (1);
	}