PMSEMSTR(3)               Library Functions Manual               PMSEMSTR(3)

NAME         top

       pmSemStr,  pmSemStr_r  - convert a performance metric semantic into a

C SYNOPSIS         top

       #include <pcp/pmapi.h>

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

       cc ... -lpcp

DESCRIPTION         top

       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

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

       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

NOTES         top

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

SEE ALSO         top

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

COLOPHON         top

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Performance Co-Pilot                 PCP                         PMSEMSTR(3)