NNG_STAT_TYPE(3)

NAME
nng_stat_type - get statistic type

SYNOPSIS

    #include <nng/nng.h>
    typedef struct nng_stat nng_stat;
    enum {
            NNG_STAT_SCOPE,
            NNG_STAT_LEVEL,
            NNG_STAT_COUNTER,
            NNG_STAT_STRING,
            NNG_STAT_BOOLEAN,
            NNG_STAT_ID
    };
    int nng_stat_type(nng_stat *stat);

DESCRIPTION

The nng_stat_type() function returns the type of the statistic stat.

The returned type will be one of the following values:

NNG_STAT_SCOPE
    This is a placeholder providing scope, and carries no value on its own. Instead it is a parent node with child statistics (see nng_stat_child().)

NNG_STAT_LEVEL
    This is a numeric statistic, but its value is a level, so rate calculations based on changes in this value should not be considered significant.

NNG_STAT_COUNTER
    This is a numeric statistic that represents an increasing count, typically of events, messages, or bytes. Frequently, it is interesting to consider changes in this statistic divided by time to obtain a rate. (For example, throughput might be calculated as changes in a byte counter divided by the interval over which the change occurred.)

NNG_STAT_STRING
    This is a string, and carries no numeric value. Instead the nng_stat_string() function should be used to obtain the value.

NNG_STAT_BOOLEAN
    This is a boolean value. The nng_stat_value() function will return zero to represent a false value, and one to represent a true value.

NNG_STAT_ID: The statistic is a numeric ID. These are generally immutable values that represent an identity that might be used with another interface.

    Tip

    For NNG_STAT_COUNTER and NNG_STAT_LEVEL statistics, the nng_stat_unit() function will provide more detail about the units measured by the static.

RETURN VALUES

The statistic type for stat.

ERRORS

None.

SEE ALSO

libnng(3), nng_stats_get(3), nng_stat_string(3), nng_stat_unit(3), nng_stat_value(3), nng_stat(5), nng(7)