POSIX_TRACE_EVENTTYPELIST_GEPTONSEIXXT_PIrDo(g3r)amPmOeSrI'Xs_TMRaAnCuEa_lEVENTTYPELIST_GETNEXT_ID(3)



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

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. Successive 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 argument shall be set to zero. When no more trace
       event type identifiers are available, 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. Otherwise, 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
       The posix__trace__eventtypelist__getnext__id() and
       posix__trace__eventtypelist__rewind() functions may be removed in a future
       version.

SEE ALSO
       posix__trace__event(), posix__trace__eventid__equal(),
       posix__trace__getnext__event()

       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                  201P7OSIX_TRACE_EVENTTYPELIST_GETNEXT_ID(3)
