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

[TRC] #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 resolution of the clock used to generate timestamps from the clock-resolution 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 containing 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 argument. If the supplied string contains more than {TRACE_NAME_MAX} characters, 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 resolution. 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. Otherwise, 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. Otherwise, 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() functions may fail if:

[EINVAL]

The value specified by one of the arguments is invalid.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

posix_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>

CHANGE HISTORY

First released in Issue 6. Derived from IEEE Std 1003.1q-2000.