NAME

       pmSemStr, pmSemStr_r - convert a performance metric semantic into a string

C SYNOPSIS

       #include <pcp/pmapi.h>

       const char *pmSemStr(int sem);
       char *pmSemStr_r(int sem, char *buf, int buflen);

       cc ... -lpcp

DESCRIPTION

       Given  a  performance metric semantic, pmSemStr produces a terse ASCII equivalent, appropriate for use in
       error and diagnostic messages.  The pmSemStr_r function does the same, but stores the result in  a  user-
       supplied buffer buf of length buflen, which should have room for at least 20 bytes.

       The value for sem is typically extracted from a pmDesc structure, following a call to pmLookupDesc(3) for
       a particular performance metric.

       Examples are counter (for sem equals PM_SEM_COUNTER), discrete (for sem equals PM_SEM_DISCRETE),  instant
       (for sem equals PM_SEM_INSTANT), etc.

       The  string  value  result  for pmSemStr is held in a single static buffer, so the returned value is only
       valid until the next call to pmSemStr.

NOTES

       pmSemStr returns a pointer to a static buffer and hence is not thread-safe.  Multi-threaded  applications
       should use pmSemStr_r instead.

SEE ALSO

       PMAPI(3),  pmAtomStr(3), pmConvScale(3), pmExtractValue(3), pmLookupDesc(3), pmPrintValue(3), pmIDStr(3),
       pmInDomStr(3), pmTypeStr(3) and pmUnitsStr(3).