POSIX_TRACE_ATTR_DESTROY(3)POSIX Programmer's ManualPOSIX_TRACE_ATTR_DESTROY(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_attr_destroy, posix_trace_attr_init -- destroy and
       initialize the trace stream attributes object (TRACING)

SYNOPSIS
       #include <trace.h>

       int posix_trace_attr_destroy(trace_attr_t *attr);
       int posix_trace_attr_init(trace_attr_t *attr);

DESCRIPTION
       The posix__trace__attr__destroy() function shall destroy an initialized
       trace attributes object.  A destroyed attr attributes object can be
       reinitialized using posix__trace__attr__init(); the results of otherwise
       referencing the object after it has been destroyed are undefined.

       The posix__trace__attr__init() function shall initialize a trace
       attributes object attr with the default value for all of the individual
       attributes used by a given implementation. The read-only generation-
       version and clock-resolution attributes of the newly initialized trace
       attributes object shall be set to their appropriate values (see Section
       2.11.1.2, posix__trace__status__info Structure).

       Results are undefined if posix__trace__attr__init() is called specifying
       an already initialized attr attributes object.

       Implementations may add extensions to the trace attributes object
       structure as permitted in the Base Definitions volume of POSIX.1-2017,
       Chapter _2, Conformance.

       The resulting attributes object (possibly modified by setting
       individual attributes values), when used by posix__trace__create(),
       defines the attributes of the trace stream created. A single attributes
       object can be used in multiple calls to posix__trace__create().  After
       one or more trace streams have been created using an attributes object,
       any function affecting that attributes object, including destruction,
       shall not affect any trace stream previously created. An initialized
       attributes object also serves to receive the attributes of an existing
       trace stream or trace log when calling the posix__trace__get__attr()
       function.

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

ERRORS
       The posix__trace__attr__destroy() function may fail if:

       EINVAL The value of attr is invalid.

       The posix__trace__attr__init() function shall fail if:

       ENOMEM Insufficient memory exists to initialize the trace attributes
              object.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       The posix__trace__attr__destroy() and posix__trace__attr__init() functions
       may be removed in a future version.

SEE ALSO
       posix__trace__create(), posix__trace__get__attr(), uname()

       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                  2017          POSIX_TRACE_ATTR_DESTROY(3)
