posix_trace_attr_destroy(3p) [centos man page]

POSIX_TRACE_ATTR_DESTROY(3P)				     POSIX Programmer's Manual				      POSIX_TRACE_ATTR_DESTROY(3P)

PROLOG

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

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>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003					      POSIX_TRACE_ATTR_DESTROY(3P)

POSIX_TRACE_GET_ATTR(3P)				     POSIX Programmer's Manual					  POSIX_TRACE_GET_ATTR(3P)

PROLOG

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

NAME

       posix_trace_get_attr, posix_trace_get_status - retrieve the trace attributes or trace status (TRACING)

SYNOPSIS

       #include <trace.h>

       int posix_trace_get_attr(trace_id_t trid, trace_attr_t *attr);
       int posix_trace_get_status(trace_id_t trid,
	      struct posix_trace_status_info *statusinfo);

DESCRIPTION

       The posix_trace_get_attr() function shall copy the attributes of the active trace stream identified by trid into the object pointed  to	by
       the attr argument.   If the Trace Log option is supported, trid may represent a pre-recorded trace log.

       The  posix_trace_get_status()  function	shall return, in the structure pointed to by the statusinfo argument, the current trace status for
       the trace stream identified by the trid argument. These status values returned in the structure pointed to by statusinfo  shall	have  been
       appropriately read to ensure that the returned values are consistent.  If the Trace Log option is supported and the trid argument refers to
       a pre-recorded trace stream, the status shall be the status of the completed trace stream.

       Each time the posix_trace_get_status() function is used, the overrun status of the trace stream shall be  reset	to  POSIX_TRACE_NO_OVERRUN
       immediately after the call completes.  If the Trace Log option is supported, the posix_trace_get_status() function shall behave the same as
       when the option is not supported except for the following differences:

	* If the trid argument refers to a trace stream with log, each time the posix_trace_get_status() function is used, the log overrun  status
	  of  the  trace  stream  shall be reset to POSIX_TRACE_NO_OVERRUN and the flush_error status shall be reset to zero immediately after the
	  call completes.

	* If the trid argument refers to a pre-recorded trace stream, the status returned shall be the status of the completed	trace  stream  and
	  the status values of the trace stream shall not be reset.

RETURN VALUE

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

       The posix_trace_get_attr() function stores the trace attributes in the object pointed to by attr, if successful.

       The posix_trace_get_status() function stores the trace status in the object pointed to by statusinfo, if successful.

ERRORS

       These functions shall fail if:

       EINVAL The trace stream argument trid does not correspond to a valid active trace stream or a valid trace log.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       posix_trace_attr_destroy(),   posix_trace_attr_init(),	posix_trace_create(),	posix_trace_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 Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003						  POSIX_TRACE_GET_ATTR(3P)