posix_trace_eventtypelist_getnext_id(3p) - phpMan

POSIX_TRACE_EVENTTYPELIST_GETNEXT_ID(P)POSIX_TRACE_EVENTTYPELIST_GETNEXT_ID(P)



NAME
       posix_trace_eventtypelist_getnext_id,  posix_trace_eventtypelist_rewind  -  iterate
       over a mapping of trace event types (TRACING)

SYNOPSIS
       #include <trace.h>

       int posix_trace_eventtypelist_getnext_id(trace_id_t trid,
              trace_event_id_t *restrict event, int *restrict unavailable);
       int posix_trace_eventtypelist_rewind(trace_id_t trid);


DESCRIPTION
       The first time posix_trace_eventtypelist_getnext_id() is called, the function shall
       return in the variable pointed to by event the first trace event type identifier of
       the list of trace events of the trace stream identified by the trid argument.  Suc-
       cessive  calls  to  posix_trace_eventtypelist_getnext_id()  return  in the variable
       pointed to by event the next trace event type identifier in that  same  list.  Each
       time  a  trace  event  type  identifier  is  successfully written into the variable
       pointed to by the event argument, the variable pointed to by the unavailable  argu-
       ment  shall  be  set to zero.  When no more trace event type identifiers are avail-
       able, and so none is returned, the variable pointed to by the unavailable  argument
       shall be set to a value different from zero.

       The  posix_trace_eventtypelist_rewind()  function  shall reset the next trace event
       type identifier to be read to the first trace event type identifier from  the  list
       of trace events used in the trace stream identified by trid.

RETURN VALUE
       Upon  successful  completion,  these functions shall return a value of zero. Other-
       wise, they shall return the corresponding error number.

       The posix_trace_eventtypelist_getnext_id() function stores  the  trace  event  type
       identifier value in the object pointed to by event, if successful.

ERRORS
       These functions shall fail if:

       EINVAL The trid argument was not a valid trace stream identifier.


       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       posix_trace_event() , posix_trace_getnext_event() , 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 .



POSIX                                20POSIX_TRACE_EVENTTYPELIST_GETNEXT_ID(P)

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