PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       posix_trace_eventset_add, posix_trace_eventset_del, posix_trace_eventset_empty,
       posix_trace_eventset_fill, posix_trace_eventset_ismember — manipulate trace event type sets (TRACING)

SYNOPSIS

       #include <trace.h>

       int posix_trace_eventset_add(trace_event_id_t event_id,
           trace_event_set_t *set);
       int posix_trace_eventset_del(trace_event_id_t event_id,
           trace_event_set_t *set);
       int posix_trace_eventset_empty(trace_event_set_t *set);
       int posix_trace_eventset_fill(trace_event_set_t *set, int what);
       int posix_trace_eventset_ismember(trace_event_id_t event_id,
           const trace_event_set_t *restrict set, int *restrict ismember);

DESCRIPTION

       These  primitives  manipulate  sets of trace event types. They operate on data objects addressable by the
       application, not on the current trace event filter of any trace stream.

       The posix_trace_eventset_add() and  posix_trace_eventset_del()  functions,  respectively,  shall  add  or
       delete  the  individual  trace  event type specified by the value of the argument event_id to or from the
       trace event type set pointed to by the argument set.  Adding a trace event type already  in  the  set  or
       deleting a trace event type not in the set shall not be considered an error.

       The posix_trace_eventset_empty() function shall initialize the trace event type set pointed to by the set
       argument such that all trace event types defined, both system and user, shall be excluded from the set.

       The  posix_trace_eventset_fill()  function  shall  initialize  the trace event type set pointed to by the
       argument set, such that the set of trace event types defined by the argument what shall  be  included  in
       the  set.  The value of the argument what shall consist of one of the following values, as defined in the
       <trace.h> header:

       POSIX_TRACE_WOPID_EVENTS
             All the process-independent implementation-defined system trace event types  are  included  in  the
             set.

       POSIX_TRACE_SYSTEM_EVENTS
             All  the  implementation-defined  system  trace  event  types are included in the set, as are those
             defined in POSIX.1‐2008.

       POSIX_TRACE_ALL_EVENTS
             All trace event types defined, both system and user, are included in the set.

       Applications shall call either posix_trace_eventset_empty() or posix_trace_eventset_fill() at least  once
       for each object of type trace_event_set_t prior to any other use of that object. If such an object is not
       initialized   in   this   way,   but   is   nonetheless   supplied   as   an   argument  to  any  of  the
       posix_trace_eventset_add(), posix_trace_eventset_del(), or posix_trace_eventset_ismember() functions, the
       results are undefined.

       The posix_trace_eventset_ismember() function shall test whether the trace event  type  specified  by  the
       value of the argument event_id is a member of the set pointed to by the argument set.  The value returned
       in  the object pointed to by ismember argument is zero if the trace event type identifier is not a member
       of the set and a value different from zero if it is a member of the set.

RETURN VALUE

       Upon successful completion, these functions shall return a value of zero. Otherwise,  they  shall  return
       the corresponding error number.

ERRORS

       These functions may fail if:

       EINVAL The value of one of the arguments is invalid.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       The       posix_trace_eventset_add(),      posix_trace_eventset_del(),      posix_trace_eventset_empty(),
       posix_trace_eventset_fill(), and posix_trace_eventset_ismember() functions may be  removed  in  a  future
       version.

SEE ALSO

       posix_trace_eventid_equal(), posix_trace_get_filter()

       The Base Definitions volume of POSIX.1‐2017, <trace.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical  and  Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE  and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                      POSIX_TRACE_EVENTSET_ADD(3POSIX)