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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 in‐
 terfaces 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: __pmAc‐
 cAddOp, __pmAccSaveHosts, __pmAccRestoreHosts, __pmAc‐
 cFreeSavedHosts, __pmAccAddHost, __pmAccAddClient, __pmAccDel‐
 Client 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. In‐
 formation 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
 2025年08月11日. (At that time, the date of the most recent commit
 that was found in the repository was 2025年08月11日.) 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 PMAPI_INTERNAL(3)

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