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NAME | C SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | COLOPHON |
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PMUSECONTEXT(3) Library Functions Manual PMUSECONTEXT(3)
pmUseContext - change current PMAPI context
#include <pcp/pmapi.h>
int pmUseContext(int handle);
cc ... -lpcp
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.
PM_ERR_NOCONTEXT
handle does not identify a valid PMAPI context
PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3)
and pmWhichContext(3).
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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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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