pmusecontext(3) — Linux manual page

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 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).

COLOPHON

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Performance Co-Pilot               PCP                   PMUSECONTEXT(3)

Pages that refer to this page: pmaddprofile(3), pmapi(3), pmdelprofile(3), pmdestroycontext(3), pmdupcontext(3), pmfetch(3), pmfetchgroup(3), pmistart(3), pmnewcontext(3), pmreconnectcontext(3), pmwhichcontext(3), QmcGroup(3)

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