dmi_mgmt_device_threshold
Synopsis
#include <opendmi/entity/mgmt-device-threshold.h>
typedef struct dmi_mgmt_device_threshold {
short lower_non_critical;
short upper_non_critical;
short lower_critical;
short upper_critical;
short lower_non_recoverable;
short upper_non_recoverable;
dmi_type_id_t component_type;
bool is_ambiguous;
} dmi_mgmt_device_threshold_t;Description
The dmi_mgmt_device_threshold_t structure holds the decoded management
device threshold data structure (type 36) of SMBIOS: the thresholds of a
component of a management device, that is, of a voltage, temperature or
electrical current probe, or of a cooling device. A management device
component structure (type 35) refers to it.
The thresholds are signed, and their units are the ones of the component:
millivolts for a voltage probe, tenths of degree Celsius for a temperature
probe, milliamperes for an electrical current probe, and revolutions per
minute for a cooling device. A threshold which is not available is
SHRT_MIN (0x8000 as stored).
The structure is returned by dmi_entity_info for the structures of type
DMI_TYPE(mgmt_device_threshold), and lives as long as the context it has
been decoded in.
Fields
lower_non_critical-
Lower non-critical threshold, or
SHRT_MIN. upper_non_critical-
Upper non-critical threshold, or
SHRT_MIN. lower_critical-
Lower critical threshold, or
SHRT_MIN. upper_critical-
Upper critical threshold, or
SHRT_MIN. lower_non_recoverable-
Lower non-recoverable threshold, or
SHRT_MIN. upper_non_recoverable-
Upper non-recoverable threshold, or
SHRT_MIN. component_type-
Type number of the component using the thresholds, such as
DMI_TYPE_ID_VOLTAGE_PROBE, which tells the units of the values. Set when the management device components are linked.DMI_TYPE_ID_INVALIDif no component uses the thresholds, or if components of different types do. is_ambiguous-
trueif components of different types use the thresholds, so that their units are unknown.
Examples
dmi_registry_t *registry = dmi_get_registry(context);
dmi_entity_t *entity = dmi_registry_lookup_first(
registry, DMI_TYPE(mgmt_device_threshold), true);
dmi_mgmt_device_threshold_t *threshold = dmi_entity_info(
entity, DMI_TYPE(mgmt_device_threshold));
if ((threshold != nullptr) &&
(threshold->component_type == DMI_TYPE_ID_TEMPERATURE_PROBE) &&
(threshold->upper_critical != SHRT_MIN))
printf("Critical above %.1f C\n", threshold->upper_critical / 10.0);