C++ sd_event_add_time函数代码示例

static int PmonInit(sd_bus_message *m, void *userdata, sd_bus_error *retError)
{
	usec_t time = 0;
	sd_bus_message_read(m, "t", &time);
	int id = 0;
	if (openSlots == 0) {
		return sd_bus_reply_method_return(m, "u", -1);
	}

	uint64_t usec = 0;
	sd_event_now(event, CLOCK_MONOTONIC, &usec);
	usec += time;
	if (clients[lastAllocatedId] == NULL) {
		id = lastAllocatedId;

		sd_event_add_time(event, &clients[lastAllocatedId], CLOCK_MONOTONIC, usec, 1000,
					Timeout, (void *)sd_bus_message_get_sender(m));
		lastAllocatedId += 1;
		openSlots -= 1;
		clientTimeout[id] = time;
		return sd_bus_reply_method_return(m, "u", id);
	}

	id = freeIds[lastFreedSlot];

	sd_event_add_time(event, &clients[freeIds[lastFreedSlot]], CLOCK_MONOTONIC, usec, 1000,
				Timeout, (void *)sd_bus_message_get_sender(m));

	lastFreedSlot -= 1;
	openSlots -= 1;
	clientTimeout[id] = time;
	return sd_bus_reply_method_return(m, "u", id);
}

static int pppoe_arm_timeout(sd_pppoe *ppp) {
        _cleanup_event_source_unref_ sd_event_source *timeout = NULL;
        usec_t next_timeout;
        int r;

        assert(ppp);

        r = sd_event_now(ppp->event, clock_boottime_or_monotonic(), &next_timeout);
        if (r == -ENODATA)
                next_timeout = now(clock_boottime_or_monotonic());
        else if (r < 0)
                return r;

        next_timeout += 500 * USEC_PER_MSEC;

        r = sd_event_add_time(ppp->event, &timeout, clock_boottime_or_monotonic(), next_timeout,
                              10 * USEC_PER_MSEC, pppoe_timeout, ppp);
        if (r < 0)
                return r;

        r = sd_event_source_set_priority(timeout, ppp->event_priority);
        if (r < 0)
                return r;

        sd_event_source_unref(ppp->timeout);
        ppp->timeout = timeout;
        timeout = NULL;

        return 0;
}

static int curl_glue_timer_callback(CURLM *curl, long timeout_ms, void *userdata) {
        CurlGlue *g = userdata;
        usec_t usec;

        assert(curl);
        assert(g);

        if (timeout_ms < 0) {
                if (g->timer) {
                        if (sd_event_source_set_enabled(g->timer, SD_EVENT_OFF) < 0)
                                return -1;
                }

                return 0;
        }

        usec = now(clock_boottime_or_monotonic()) + (usec_t) timeout_ms * USEC_PER_MSEC + USEC_PER_MSEC - 1;

        if (g->timer) {
                if (sd_event_source_set_time(g->timer, usec) < 0)
                        return -1;

                if (sd_event_source_set_enabled(g->timer, SD_EVENT_ONESHOT) < 0)
                        return -1;
        } else {
                if (sd_event_add_time(g->event, &g->timer, clock_boottime_or_monotonic(), usec, 0, curl_glue_on_timer, g) < 0)
                        return -1;

                (void) sd_event_source_set_description(g->timer, "curl-timer");
        }

        return 0;
}

static int ipv4acd_set_next_wakeup(sd_ipv4acd *acd, usec_t usec, usec_t random_usec) {
        _cleanup_(sd_event_source_unrefp) sd_event_source *timer = NULL;
        usec_t next_timeout, time_now;
        int r;

        assert(acd);

        next_timeout = usec;

        if (random_usec > 0)
                next_timeout += (usec_t) random_u64() % random_usec;

        assert_se(sd_event_now(acd->event, clock_boottime_or_monotonic(), &time_now) >= 0);

        r = sd_event_add_time(acd->event, &timer, clock_boottime_or_monotonic(), time_now + next_timeout, 0, ipv4acd_on_timeout, acd);
        if (r < 0)
                return r;

        r = sd_event_source_set_priority(timer, acd->event_priority);
        if (r < 0)
                return r;

        (void) sd_event_source_set_description(timer, "ipv4acd-timer");

        sd_event_source_unref(acd->timer_event_source);
        acd->timer_event_source = timer;
        timer = NULL;

        return 0;
}

static int busname_arm_timer(BusName *n) {
        int r;

        assert(n);

        if (n->timeout_usec <= 0) {
                n->timer_event_source = sd_event_source_unref(n->timer_event_source);
                return 0;
        }

        if (n->timer_event_source) {
                r = sd_event_source_set_time(n->timer_event_source, now(CLOCK_MONOTONIC) + n->timeout_usec);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT);
        }

        return sd_event_add_time(
                        UNIT(n)->manager->event,
                        &n->timer_event_source,
                        CLOCK_MONOTONIC,
                        now(CLOCK_MONOTONIC) + n->timeout_usec, 0,
                        busname_dispatch_timer, n);
}

static int busname_arm_timer(BusName *n, usec_t usec) {
        int r;

        assert(n);

        if (n->timer_event_source) {
                r = sd_event_source_set_time(n->timer_event_source, usec);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT);
        }

        if (usec == USEC_INFINITY)
                return 0;

        r = sd_event_add_time(
                        UNIT(n)->manager->event,
                        &n->timer_event_source,
                        CLOCK_MONOTONIC,
                        usec, 0,
                        busname_dispatch_timer, n);
        if (r < 0)
                return r;

        (void) sd_event_source_set_description(n->timer_event_source, "busname-timer");

        return 0;
}

static int scope_arm_timer(Scope *s) {
        int r;

        assert(s);

        if (s->timeout_stop_usec <= 0) {
                s->timer_event_source = sd_event_source_unref(s->timer_event_source);
                return 0;
        }

        if (s->timer_event_source) {
                r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_stop_usec);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
        }

        r = sd_event_add_time(
                        UNIT(s)->manager->event,
                        &s->timer_event_source,
                        CLOCK_MONOTONIC,
                        now(CLOCK_MONOTONIC) + s->timeout_stop_usec, 0,
                        scope_dispatch_timer, s);
        if (r < 0)
                return r;

        (void) sd_event_source_set_description(s->timer_event_source, "scope-timer");

        return 0;
}

static void test_rs(sd_event *e) {
        usec_t time_now = now(CLOCK_MONOTONIC);
        sd_icmp6_nd *nd;

        if (verbose)
                printf("* %s\n", __FUNCTION__);

        assert(sd_icmp6_nd_new(&nd) >= 0);
        assert(nd);

        assert(sd_icmp6_nd_attach_event(nd, e, 0) >= 0);

        assert(sd_icmp6_nd_set_index(nd, 42) >= 0);
        assert(sd_icmp6_nd_set_mac(nd, &mac_addr) >= 0);
        assert(sd_icmp6_nd_set_callback(nd, test_rs_done, e) >= 0);

        assert(sd_event_add_time(e, &test_hangcheck, CLOCK_MONOTONIC,
                                 time_now + 2 *USEC_PER_SEC, 0,
                                 test_rs_hangcheck, NULL) >= 0);

        assert(sd_icmp6_nd_stop(nd) >= 0);
        assert(sd_icmp6_router_solicitation_start(nd) >= 0);
        assert(sd_icmp6_nd_stop(nd) >= 0);

        assert(sd_icmp6_router_solicitation_start(nd) >= 0);

        sd_event_loop(e);

        test_hangcheck = sd_event_source_unref(test_hangcheck);

        nd = sd_icmp6_nd_unref(nd);
        assert(!nd);

        close(test_fd[1]);
}

static int scope_arm_timer(Scope *s, usec_t usec) {
        int r;

        assert(s);

        if (s->timer_event_source) {
                r = sd_event_source_set_time(s->timer_event_source, usec);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
        }

        if (usec == USEC_INFINITY)
                return 0;

        r = sd_event_add_time(
                        UNIT(s)->manager->event,
                        &s->timer_event_source,
                        CLOCK_MONOTONIC,
                        usec, 0,
                        scope_dispatch_timer, s);
        if (r < 0)
                return r;

        (void) sd_event_source_set_description(s->timer_event_source, "scope-timer");

        return 0;
}

static int automount_start_expire(Automount *a) {
        int r;
        usec_t timeout;

        assert(a);

        if (a->timeout_idle_usec == 0)
                return 0;

        timeout = now(CLOCK_MONOTONIC) + MAX(a->timeout_idle_usec/3, USEC_PER_SEC);

        if (a->expire_event_source) {
                r = sd_event_source_set_time(a->expire_event_source, timeout);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(a->expire_event_source, SD_EVENT_ONESHOT);
        }

        r = sd_event_add_time(
                        UNIT(a)->manager->event,
                        &a->expire_event_source,
                        CLOCK_MONOTONIC, timeout, 0,
                        automount_dispatch_expire, a);
        if (r < 0)
                return r;

        (void) sd_event_source_set_description(a->expire_event_source, "automount-expire");

        return 0;
}

static int sntp_arm_timer(SNTPContext *sntp, usec_t next) {
        sd_event *e;
        int r;

        assert(sntp);
        assert(sntp->event_receive);

        if (next == 0) {
                sntp->event_timer = sd_event_source_unref(sntp->event_timer);
                return 0;
        }

        if (sntp->event_timer) {
                r = sd_event_source_set_time(sntp->event_timer, now(CLOCK_MONOTONIC) + next);
                if (r < 0)
                        return r;

                return sd_event_source_set_enabled(sntp->event_timer, SD_EVENT_ONESHOT);
        }

        e = sd_event_source_get_event(sntp->event_receive);
        r = sd_event_add_time(
                        e,
                        &sntp->event_timer,
                        CLOCK_MONOTONIC,
                        now(CLOCK_MONOTONIC) + next, 0,
                        sntp_timer, sntp);
        if (r < 0)
                return r;

        return 0;
}

static int icmp6_router_solicitation_timeout(sd_event_source *s, uint64_t usec,
                                             void *userdata)
{
        sd_icmp6_nd *nd = userdata;
        uint64_t time_now, next_timeout;
        struct ether_addr unset = { };
        struct ether_addr *addr = NULL;
        int r;

        assert(s);
        assert(nd);
        assert(nd->event);

        nd->timeout = sd_event_source_unref(nd->timeout);

        if (nd->nd_sent >= ICMP6_MAX_ROUTER_SOLICITATIONS) {
                icmp6_nd_notify(nd, ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT);
                nd->state = ICMP6_ROUTER_ADVERTISMENT_LISTEN;
        } else {
                if (memcmp(&nd->mac_addr, &unset, sizeof(struct ether_addr)))
                        addr = &nd->mac_addr;

                r = dhcp_network_icmp6_send_router_solicitation(nd->fd, addr);
                if (r < 0)
                        log_icmp6_nd(nd, "Error sending Router Solicitation");
                else {
                        nd->state = ICMP6_ROUTER_SOLICITATION_SENT;
                        log_icmp6_nd(nd, "Sent Router Solicitation");
                }

                nd->nd_sent++;

                r = sd_event_now(nd->event, CLOCK_MONOTONIC, &time_now);
                if (r < 0) {
                        icmp6_nd_notify(nd, r);
                        return 0;
                }

                next_timeout = time_now + ICMP6_ROUTER_SOLICITATION_INTERVAL;

                r = sd_event_add_time(nd->event, &nd->timeout, CLOCK_MONOTONIC,
                                      next_timeout, 0,
                                      icmp6_router_solicitation_timeout, nd);
                if (r < 0) {
                        icmp6_nd_notify(nd, r);
                        return 0;
                }

                r = sd_event_source_set_priority(nd->timeout,
                                                 nd->event_priority);
                if (r < 0) {
                        icmp6_nd_notify(nd, r);
                        return 0;
                }
        }

        return 0;
}

int sd_icmp6_router_solicitation_start(sd_icmp6_nd *nd) {
        int r;

        assert(nd);
        assert(nd->event);

        if (nd->state != ICMP6_NEIGHBOR_DISCOVERY_IDLE)
                return -EINVAL;

        if (nd->index < 1)
                return -EINVAL;

        r = dhcp_network_icmp6_bind_router_solicitation(nd->index);
        if (r < 0)
                return r;

        nd->fd = r;

        r = sd_event_add_io(nd->event, &nd->recv, nd->fd, EPOLLIN,
                            icmp6_router_advertisment_recv, nd);
        if (r < 0)
                goto error;

        r = sd_event_source_set_priority(nd->recv, nd->event_priority);
        if (r < 0)
                goto error;

        r = sd_event_source_set_description(nd->recv, "icmp6-receive-message");
        if (r < 0)
                goto error;

        r = sd_event_add_time(nd->event, &nd->timeout, clock_boottime_or_monotonic(),
                              0, 0, icmp6_router_solicitation_timeout, nd);
        if (r < 0)
                goto error;

        r = sd_event_source_set_priority(nd->timeout, nd->event_priority);
        if (r < 0)
                goto error;

        r = sd_event_source_set_description(nd->timeout, "icmp6-timeout");
error:
        if (r < 0)
                icmp6_nd_init(nd);
        else
                log_icmp6_nd(client, "Start Router Solicitation");

        return r;
}

int manager_setup_wall_message_timer(Manager *m) {

        usec_t n, elapse;
        int r;

        assert(m);

        n = now(CLOCK_REALTIME);
        elapse = m->scheduled_shutdown_timeout;

        /* wall message handling */

        if (isempty(m->scheduled_shutdown_type)) {
                warn_wall(m, n);
                return 0;
        }

        if (elapse < n)
                return 0;

        /* Warn immediately if less than 15 minutes are left */
        if (elapse - n < 15 * USEC_PER_MINUTE) {
                r = warn_wall(m, n);
                if (r == 0)
                        return 0;
        }

        elapse = when_wall(n, elapse);
        if (elapse == 0)
                return 0;

        if (m->wall_message_timeout_source) {
                r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
                if (r < 0)
                        return log_error_errno(r, "sd_event_source_set_time() failed. %m");

                r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
                if (r < 0)
                        return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
        } else {
                r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
                                      CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
                if (r < 0)
                        return log_error_errno(r, "sd_event_add_time() failed. %m");
        }

        return 0;
}

int link_lldp_emit_start(Link *link) {
        usec_t next;
        int r;

        assert(link);

        if (!link->network || link->network->lldp_emit == LLDP_EMIT_NO) {
                link_lldp_emit_stop(link);
                return 0;
        }

        /* Starts the LLDP transmission in "fast" mode. If it is already started, turns "fast" mode back on again. */

        link->lldp_tx_fast = LLDP_TX_FAST_INIT;

        next = usec_add(usec_add(now(clock_boottime_or_monotonic()), LLDP_FAST_TX_USEC),
                     (usec_t) random_u64() % LLDP_JITTER_USEC);

        if (link->lldp_emit_event_source) {
                usec_t old;

                /* Lower the timeout, maybe */
                r = sd_event_source_get_time(link->lldp_emit_event_source, &old);
                if (r < 0)
                        return r;

                if (old <= next)
                        return 0;

                return sd_event_source_set_time(link->lldp_emit_event_source, next);
        } else {
                r = sd_event_add_time(
                                link->manager->event,
                                &link->lldp_emit_event_source,
                                clock_boottime_or_monotonic(),
                                next,
                                0,
                                on_lldp_timer,
                                link);
                if (r < 0)
                        return r;

                (void) sd_event_source_set_description(link->lldp_emit_event_source, "lldp-tx");
        }

        return 0;
}