NAME | C SYNOPSIS | DESCRIPTION | SEE ALSO | DIAGNOSTICS | COLOPHON

PMUSECONTEXT(3)           Library Functions Manual           PMUSECONTEXT(3)

NAME         top

       pmUseContext - change current PMAPI context

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmUseContext(int handle);

       cc ... -lpcp

DESCRIPTION         top

       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
       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.

SEE ALSO         top

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

DIAGNOSTICS         top

       PM_ERR_NOCONTEXT

              handle does not identify a valid PMAPI context

COLOPHON         top

       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@oss.sgi.com.  This page was obtained from the project's upstream
       Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-07-05.  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)