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libtraceevent(3)
================
NAME
----
tep_event_common_fields, tep_event_fields - Get a list of fields for an event.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
--
DESCRIPTION
-----------
The *tep_event_common_fields()* function returns an array of pointers to common
fields for the _event_. The array is allocated in the function and must be freed
by free(). The last element of the array is NULL.
The *tep_event_fields()* function returns an array of pointers to event specific
fields for the _event_. The array is allocated in the function and must be freed
by free(). The last element of the array is NULL.
RETURN VALUE
------------
Both *tep_event_common_fields()* and *tep_event_fields()* functions return
an array of pointers to tep_format_field structures in case of success, or
NULL in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int i;
struct tep_format_field **fields;
struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
if (event != NULL) {
fields = tep_event_common_fields(event);
if (fields != NULL) {
i = 0;
while (fields[i]) {
/*
walk through the list of the common fields
of the kvm_exit event
*/
i++;
}
free(fields);
}
fields = tep_event_fields(event);
if (fields != NULL) {
i = 0;
while (fields[i]) {
/*
walk through the list of the event specific
fields of the kvm_exit event
*/
i++;
}
free(fields);
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
*libtraceevent*(3), *trace-cmd*(1)
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
|
