C++ (Cpp) usec_sub_unsigned примеры использования

Пример #1

Файл: journal-upload-journal.c Проект: falconindy/systemd

static inline void check_update_watchdog(Uploader *u) {
        usec_t after;
        usec_t elapsed_time;

        if (u->watchdog_usec <= 0)
                return;

        after = now(CLOCK_MONOTONIC);
        elapsed_time = usec_sub_unsigned(after, u->watchdog_timestamp);
        if (elapsed_time > u->watchdog_usec / 2) {
                log_debug("Update watchdog timer");
                sd_notify(false, "WATCHDOG=1");
                u->watchdog_timestamp = after;
        }
}

Пример #2

Файл: test-time-util.c Проект: Hariprasathganesh/testsysd

static void test_usec_sub_unsigned(void) {
        log_info("/* %s */", __func__);

        assert_se(usec_sub_unsigned(0, 0) == 0);
        assert_se(usec_sub_unsigned(0, 2) == 0);
        assert_se(usec_sub_unsigned(0, USEC_INFINITY) == 0);
        assert_se(usec_sub_unsigned(1, 0) == 1);
        assert_se(usec_sub_unsigned(1, 1) == 0);
        assert_se(usec_sub_unsigned(1, 2) == 0);
        assert_se(usec_sub_unsigned(1, 3) == 0);
        assert_se(usec_sub_unsigned(1, USEC_INFINITY) == 0);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, 0) == USEC_INFINITY-1);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, 1) == USEC_INFINITY-2);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, 2) == USEC_INFINITY-3);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY-2) == 1);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY-1) == 0);
        assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY) == 0);
        assert_se(usec_sub_unsigned(USEC_INFINITY, 0) == USEC_INFINITY);
        assert_se(usec_sub_unsigned(USEC_INFINITY, 1) == USEC_INFINITY);
        assert_se(usec_sub_unsigned(USEC_INFINITY, 2) == USEC_INFINITY);
        assert_se(usec_sub_unsigned(USEC_INFINITY, USEC_INFINITY) == USEC_INFINITY);
}