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 of performance metrics as created by pmlogger(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.

DIAGNOSTICS

       PM_ERR_NOCONTEXT

              handle does not identify a valid PMAPI context

SEE ALSO

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