pmapi_internal(3) — Linux manual page

PMAPI_INTERNAL(3)       Library Functions Manual       PMAPI_INTERNAL(3)

NAME         top

       PMAPI_INTERNAL - internal details for the Performance Metrics
       Application Programming Interface

C SYNOPSIS         top

       #include "pmapi.h"
       #include "libpcp.h"

        ... assorted routines ...

       cc ... -lpcp

CAVEAT         top

       This documentation is intended for internal Performance Co-Pilot
       (PCP) developer use.

       These interfaces are not part of the PCP APIs that are guaranteed
       to remain fixed across releases, and they may not work, or may
       provide different semantics at some point in the future.

DESCRIPTION         top

       Refer to PMAPI(3) for general information about the external
       interfaces defined in <pcp/pmapi.h>.  The interfaces described
       here assume that context.

MULTI-THREADED APPLICATIONS         top

       The following groups of internal functions and services in libpcp
       are restricted to being called from a single-thread, and this is
       enforced by returning PM_ERR_THREAD when an attempt to call the
       routines in each group from more than one thread is detected.

       1.  The interval timer services use global state with semantics
           that demand it is only used in the context of a single
           thread, so __pmAFregister(3), __pmAFunregister(3),
           __pmAFblock(3), __pmAFunblock(3) and __pmAFisempty(3).

       2.  The following access control manipulation routines that are
           principally intended for single-threaded applications:
           __pmAccAddOp, __pmAccSaveHosts, __pmAccRestoreHosts,
           __pmAccFreeSavedHosts, __pmAccAddHost, __pmAccAddClient,
           __pmAccDelClient and __pmAccDumpHosts.

       3.  The following routines that identify pmlogger control ports
           and are principally intended for single-threaded
           applications: __pmLogFindPort and __pmLogFindLocalPorts.

SEE ALSO         top

       PMAPI(3).

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@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
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       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                 PMAPI_INTERNAL(3)

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