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POSIX_TRACE_EVENTSET_ADD(P)POSIX Programmer's ManuaPOSIX_TRACE_EVENTSET_ADD(P)

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 (TRAC‐
       ING)

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()	 func‐
       tions, 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 follow‐
       ing 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()	 func‐
       tions, 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)
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