MMV_LOOKUP_VALUE_DESC(3)   Library Functions Manual   MMV_LOOKUP_VALUE_DESC(3)

NAME
       mmv_lookup_value_desc - find a value in the Memory Mapped Value file

C SYNOPSIS
       #include <pcp/pmapi.h>
       #include <pcp/mmv_stats.h>

       pmAtomValue *mmv_lookup_value_desc(void *addr, const char *metric,
               const char *inst);

       cc ... -lpcp_mmv -lpcp

DESCRIPTION
       mmv_lookup_value_desc searches for the value of the instance identified
       by the external instance name inst of the metric metric in the MMV(5)
       file.  addr is the address returned from mmv_stats_init().

       The pointer returned points to a pmAtomValue union, which is defined as
       follows:

           typedef union {
               __int32_t   l;      /* 32-bit signed */
               __uint32_t  ul;     /* 32-bit unsigned */
               __int64_t   ll;     /* 64-bit signed */
               __uint64_t  ull;    /* 64-bit unsigned */
               float       f;      /* 32-bit floating point */
               double      d;      /* 64-bit floating point */
               char         *cp;   /* char ptr */
            pmValueBlock *vbp;  /* pmValueBlock ptr */
           } pmAtomValue;

       MMV string values should be set using either of the mmv_set_string or
       mmv_set_strlen routines.

RETURNS
       The function returns the address inside of the memory mapped region on
       success or NULL on failure.

SEE ALSO
       mmv_stats_init(3), mmv_inc_value(3) and mmv(5).

Performance Co-Pilot                                  MMV_LOOKUP_VALUE_DESC(3)