centos man page for pmusecontext

PMUSECONTEXT(3) 					     Library Functions Manual						   PMUSECONTEXT(3)

NAME
       pmUseContext - change current PMAPI context

C SYNOPSIS
       #include <pcp/pmapi.h>

       int pmUseContext(int handle);

       cc ... -lpcp

DESCRIPTION
       An  application	using  the  Performance Metrics Application Programming Interface (PMAPI) may manipulate several concurrent contexts, each
       associated with a source of performance metrics, e.g. pmcd(1) on some host, or an archive log of performance metrics as created	by  pmlog-
       ger(1).

       Calling	pmUseContext  causes  the  current  PMAPI  context to be set to the context identified by handle.  The value of handle must be one
       returned from an earlier call to pmNewContext(3) or pmDupContext(3).

       Below the PMAPI, all contexts used by an application are saved in their most recently modified state, so pmUseContext restores the  context
       to the state it was in the last time the context was used, not the state of the context when it was established.

SEE ALSO
       PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3) and pmWhichContext(3).

DIAGNOSTICS
       PM_ERR_NOCONTEXT

	      handle does not identify a valid PMAPI context

Performance Co-Pilot							PCP							   PMUSECONTEXT(3)