trusty (3) posix_trace_attr_init.3posix.gz

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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 Trace Stream Attributes ).

       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 IEEE Std 1003.1-2001, 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
       None.


SEE ALSO
       posix_trace_create()   ,   posix_trace_get_attr()   ,   uname()   ,   the   Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <trace.h>


       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 .