POSIX_TRACE_ATTR_GETCLOCKREPOSIX Programmer's MPOSIX_TRACE_ATTR_GETCLOCKRES(P)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.
NAME
posix_trace_attr_getclockres, posix_trace_attr_getcreatetime,
posix_trace_attr_getgenversion, posix_trace_attr_getname,
posix_trace_attr_setname - retrieve and set information about a trace
stream (TRACING)
SYNOPSIS
#include <time.h>
#include <trace.h>
int posix_trace_attr_getclockres(const trace_attr_t *attr,
struct timespec *resolution);
int posix_trace_attr_getcreatetime(const trace_attr_t *attr,
struct timespec *createtime);
#include <trace.h>
int posix_trace_attr_getgenversion(const trace_attr_t *attr,
char *genversion);
int posix_trace_attr_getname(const trace_attr_t *attr,
char *tracename);
int posix_trace_attr_setname(trace_attr_t *attr,
const char *tracename);
DESCRIPTION
The posix_trace_attr_getclockres() function shall copy the clock reso‐
lution of the clock used to generate timestamps from the clock-resolu‐
tion attribute of the attributes object pointed to by the attr argument
into the structure pointed to by the resolution argument.
The posix_trace_attr_getcreatetime() function shall copy the trace
stream creation time from the creation-time attribute of the attributes
object pointed to by the attr argument into the structure pointed to by
the createtime argument. The creation-time attribute shall represent
the time of creation of the trace stream.
The posix_trace_attr_getgenversion() function shall copy the string
containing version information from the generation-version attribute of
the attributes object pointed to by the attr argument into the string
pointed to by the genversion argument. The genversion argument shall be
the address of a character array which can store at least
{TRACE_NAME_MAX} characters.
The posix_trace_attr_getname() function shall copy the string contain‐
ing the trace name from the trace-name attribute of the attributes
object pointed to by the attr argument into the string pointed to by
the tracename argument. The tracename argument shall be the address of
a character array which can store at least {TRACE_NAME_MAX} characters.
The posix_trace_attr_setname() function shall set the name in the
trace-name attribute of the attributes object pointed to by the attr
argument, using the trace name string supplied by the tracename argu‐
ment. If the supplied string contains more than {TRACE_NAME_MAX} char‐
acters, the name copied into the trace-name attribute may be truncated
to one less than the length of {TRACE_NAME_MAX} characters. The default
value is a null string.
RETURN VALUE
Upon successful completion, these functions shall return a value of
zero. Otherwise, they shall return the corresponding error number.
If successful, the posix_trace_attr_getclockres() function stores the
clock-resolution attribute value in the object pointed to by resolu‐
tion. Otherwise, the content of this object is unspecified.
If successful, the posix_trace_attr_getcreatetime() function stores the
trace stream creation time in the object pointed to by createtime. Oth‐
erwise, the content of this object is unspecified.
If successful, the posix_trace_attr_getgenversion() function stores the
trace version information in the string pointed to by genversion. Oth‐
erwise, the content of this string is unspecified.
If successful, the posix_trace_attr_getname() function stores the trace
name in the string pointed to by tracename. Otherwise, the content of
this string is unspecified.
ERRORS
The posix_trace_attr_getclockres(), posix_trace_attr_getcreatetime(),
posix_trace_attr_getgenversion(), and posix_trace_attr_getname() func‐
tions may fail if:
EINVAL The value specified by one of the arguments is invalid.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOposix_trace_attr_init() , posix_trace_create() , posix_trace_get_attr()
, uname() , the Base Definitions volume of IEEE Std 1003.1-2001,
<time.h>, <trace.h>
COPYRIGHT
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 .
IEEE/The Open Group 2003 POSIX_TRACE_ATTR_GETCLOCKRES(P)
