Originální popis anglicky:
posix_trace_eventid_equal, posix_trace_eventid_get_name,
posix_trace_trid_eventid_open - manipulate the trace event type identifier (
TRACING)
Návod, kniha: POSIX Programmer's Manual
#include <trace.h>
int posix_trace_eventid_equal(trace_id_t
trid,
trace_event_id_t event1,
trace_event_id_t
event2 );
int posix_trace_eventid_get_name(trace_id_t
trid,
trace_event_id_t
event , char
*event_name);
int posix_trace_trid_eventid_open(trace_id_t trid,
const char *restrict
event_name,
trace_event_id_t *restrict
event);
The
posix_trace_eventid_equal() function shall compare the trace event
type identifiers
event1 and
event2 from the same trace stream or
the same trace log identified by the
trid argument. If the trace event
type identifiers
event1 and
event2 are from different trace
streams, the return value shall be unspecified.
The
posix_trace_eventid_get_name() function shall return, in the argument
pointed to by
event_name, the trace event name associated with the
trace event type identifier identified by the argument
event, for the
trace stream or for the trace log identified by the
trid argument. The
name of the trace event shall have a maximum of {TRACE_EVENT_NAME_MAX}
characters (which has the minimum value {_POSIX_TRACE_EVENT_NAME_MAX}).
Successive calls to this function with the same trace event type identifier
and the same trace stream identifier shall return the same event name.
The
posix_trace_trid_eventid_open() function shall associate a user trace
event name with a trace event type identifier for a given trace stream. The
trace stream is identified by the
trid argument, and it shall be an
active trace stream. The trace event name is the string pointed to by the
argument
event_name. It shall have a maximum of {TRACE_EVENT_NAME_MAX}
characters (which has the minimum value {_POSIX_TRACE_EVENT_NAME_MAX}). The
number of user trace event type identifiers that can be defined for any given
process is limited by the maximum value {TRACE_USER_EVENT_MAX}, which has the
minimum value {_POSIX_TRACE_USER_EVENT_MAX}.
If the Trace Inherit option is not supported, the
posix_trace_trid_eventid_open() function shall associate the user trace
event name pointed to by the
event_name argument with a trace event
type identifier that is unique for the process being traced in the trace
stream identified by the
trid argument, and is returned in the variable
pointed to by the
event argument. If the user trace event name has
already been mapped for the traced process, then the previously assigned trace
event type identifier shall be returned. If the per-process user trace event
name limit represented by {TRACE_USER_EVENT_MAX} has been reached, the
pre-defined POSIX_TRACE_UNNAMED_USEREVENT (see
Trace Option: User
Trace Event ) user trace event shall be returned.
If the Trace Inherit option is supported, the
posix_trace_trid_eventid_open() function shall associate the user trace
event name pointed to by the
event_name argument with a trace event
type identifier that is unique for all the processes being traced in the trace
stream identified by the
trid argument, and is returned in the variable
pointed to by the
event argument. If the user trace event name has
already been mapped for the traced processes, then the previously assigned
trace event type identifier shall be returned. If the per-process user trace
event name limit represented by {TRACE_USER_EVENT_MAX} has been reached, the
pre-defined POSIX_TRACE_UNNAMED_USEREVENT (see
Trace Option: User Trace
Event ) user trace event shall be returned.
Upon successful completion, the
posix_trace_eventid_get_name() and
posix_trace_trid_eventid_open() functions shall return a value of zero.
Otherwise, they shall return the corresponding error number.
The
posix_trace_eventid_equal() function shall return a non-zero value if
event1 and
event2 are equal; otherwise, a value of zero shall be
returned. No errors are defined. If either
event1 or
event2 are
not valid trace event type identifiers for the trace stream specified by
trid or if the
trid is invalid, the behavior shall be
unspecified.
The
posix_trace_eventid_get_name() function stores the trace event name
value in the object pointed to by
event_name, if successful.
The
posix_trace_trid_eventid_open() function stores the trace event type
identifier value in the object pointed to by
event, if successful.
The
posix_trace_eventid_get_name() and
posix_trace_trid_eventid_open() functions shall fail if:
- EINVAL
- The trid argument was not a valid trace stream
identifier.
The
posix_trace_trid_eventid_open() function shall fail if:
- ENAMETOOLONG
-
The size of the name pointed to by the event_name argument was longer
than the implementation-defined value {TRACE_EVENT_NAME_MAX}.
The
posix_trace_eventid_get_name() function shall fail if:
- EINVAL
- The trace event type identifier event was not
associated with any name.
The following sections are informative.
None.
None.
None.
None.
Trace Option: User Trace Event ,
posix_trace_event() ,
posix_trace_getnext_event() , 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
.
