Originální popis anglicky:
posix_trace_attr_destroy, posix_trace_attr_init - destroy and initialize the
trace stream attributes object (
TRACING)
Návod, kniha: POSIX Programmer's Manual
#include <trace.h>
int posix_trace_attr_destroy(trace_attr_t *
attr);
int posix_trace_attr_init(trace_attr_t *
attr);
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.
Upon successful completion, these functions shall return a value of zero.
Otherwise, they shall return the corresponding error number.
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.
None.
None.
None.
None.
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
.
