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.1‐2008, <trace.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers,  Inc
       and  The  Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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 .