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 IEEE Std 1003.1-2001.

       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

       None.

SEE ALSO

       posix_trace_set_filter()   ,   posix_trace_trid_eventid_open()   ,   the   Base   Definitions  volume  of
       IEEE Std 1003.1-2001, <trace.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 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 .

IEEE/The Open Group                                   2003                           POSIX_TRACE_EVENTSET_ADD(P)