C++ (Cpp) acpi_get_boot_usec示例

示例#1

文件： test-boot-timestamps.c 项目： AlexBaranosky/systemd

static int test_acpi_fpdt(void) {
        usec_t loader_start;
        usec_t loader_exit;
        char ts_start[FORMAT_TIMESPAN_MAX];
        char ts_exit[FORMAT_TIMESPAN_MAX];
        char ts_span[FORMAT_TIMESPAN_MAX];
        int r;

        r = acpi_get_boot_usec(&loader_start, &loader_exit);
        if (r < 0) {
                if (r != -ENOENT)
                        log_error_errno(r, "Failed to read ACPI FPDT: %m");
                return r;
        }

        log_info("ACPI FPDT: loader start=%s exit=%s duration=%s",
                 format_timespan(ts_start, sizeof(ts_start), loader_start, USEC_PER_MSEC),
                 format_timespan(ts_exit, sizeof(ts_exit), loader_exit, USEC_PER_MSEC),
                 format_timespan(ts_span, sizeof(ts_span), loader_exit - loader_start, USEC_PER_MSEC));

        return 0;
}

示例#2

文件： test-boot-timestamps.c 项目： dankor/systemd

static int test_acpi_fpdt(void) {
        usec_t loader_start;
        usec_t loader_exit;
        char ts_start[FORMAT_TIMESPAN_MAX];
        char ts_exit[FORMAT_TIMESPAN_MAX];
        char ts_span[FORMAT_TIMESPAN_MAX];
        int r;

        r = acpi_get_boot_usec(&loader_start, &loader_exit);
        if (r < 0) {
                bool ok = r == -ENOENT || (getuid() != 0 && r == -EACCES) || r == -ENODATA;

                log_full_errno(ok ? LOG_DEBUG : LOG_ERR,
                               r, "Failed to read ACPI FPDT: %m");
                return ok ? 0 : r;
        }

        log_info("ACPI FPDT: loader start=%s exit=%s duration=%s",
                 format_timespan(ts_start, sizeof(ts_start), loader_start, USEC_PER_MSEC),
                 format_timespan(ts_exit, sizeof(ts_exit), loader_exit, USEC_PER_MSEC),
                 format_timespan(ts_span, sizeof(ts_span), loader_exit - loader_start, USEC_PER_MSEC));
        return 1;
}