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This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

Application Usage

       None.

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 Section2.11.1.2, posix_trace_status_infoStructure).

       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, Chapter2, 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.

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.

       Thefollowingsectionsareinformative.

Examples

       None.

Future Directions

       The posix_trace_attr_destroy() and posix_trace_attr_init() functions may be removed in a future version.

Name

       posix_trace_attr_destroy,  posix_trace_attr_init  —  destroy  and  initialize the trace stream attributes
       object (TRACING)

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.

Rationale

       None.

Return Value

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

See Also

posix_trace_create(), posix_trace_get_attr(), uname()

       The Base Definitions volume of POSIX.1‐2017, <trace.h>

Synopsis

       #include <trace.h>

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

See Also