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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | FILES | SEE ALSO | AUTHOR | REPORTING BUGS | LICENSE | RESOURCES | NOTES | COLOPHON |
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LIBTRACEEVENT(3) libtraceevent Manual LIBTRACEEVENT(3)
tep_list_events, tep_list_events_copy - Get list of events,
sorted by given criteria.
#include <event-parse.h>
enum tep_event_sort_type {
TEP_EVENT_SORT_ID,
TEP_EVENT_SORT_NAME,
TEP_EVENT_SORT_SYSTEM,
};
struct tep_event **tep_list_events(struct tep_handle *tep, enum tep_event_sort_type sort_type);
struct tep_event **tep_list_events_copy(struct tep_handle *tep, enum tep_event_sort_type sort_type);
The tep_list_events() function returns an array of pointers to
the events, sorted by the sort_type criteria. The last element of
the array is NULL. The returned memory must not be freed, it is
managed by the library. The function is not thread safe. The tep
argument is trace event parser context. The sort_type argument is
the required sort criteria:
TEP_EVENT_SORT_ID - sort by the event ID.
TEP_EVENT_SORT_NAME - sort by the event (name, system, id) triplet.
TEP_EVENT_SORT_SYSTEM - sort by the event (system, name, id) triplet.
The tep_list_events_copy() is a thread safe version of
tep_list_events(). It has the same behavior, but the returned
array is allocated internally and must be freed by the caller.
Note that the content of the array must not be freed (see the
EXAMPLE below).
The tep_list_events() function returns an array of pointers to
events. In case of an error, NULL is returned. The returned array
must not be freed, it is managed by the library.
The tep_list_events_copy() function returns an array of pointers
to events. In case of an error, NULL is returned. The returned
array must be freed by the caller.
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int i;
struct tep_event_format **events;
i=0;
events = tep_list_events(tep, TEP_EVENT_SORT_ID);
if (events == NULL) {
/* Failed to get the events, sorted by ID */
} else {
while(events[i]) {
/* walk through the list of the events, sorted by ID */
i++;
}
}
i=0;
events = tep_list_events_copy(tep, TEP_EVENT_SORT_NAME);
if (events == NULL) {
/* Failed to get the events, sorted by name */
} else {
while(events[i]) {
/* walk through the list of the events, sorted by name */
i++;
}
free(events);
}
...
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.
libtraceevent(3), trace-cmd(1)
Steven Rostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.
Report bugs to <linux-trace-devel@vger.kernel.org[3]>
libtraceevent is Free Software licensed under the GNU LGPL 2.1
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
1. rostedt@goodmis.org
mailto:rostedt@goodmis.org
2. tz.stoyanov@gmail.com
mailto:tz.stoyanov@gmail.com
3. linux-trace-devel@vger.kernel.org
mailto:linux-trace-devel@vger.kernel.org
This page is part of the libtraceevent (Linux kernel trace event
library) project. Information about the project can be found at
⟨https://www.trace-cmd.org/⟩. If you have a bug report for this
manual page, see ⟨https://www.trace-cmd.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git⟩
on 2023-12-22. (At that time, the date of the most recent commit
that was found in the repository was 2023-06-07.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
libtraceevent 1.7.3 09/24/2023 LIBTRACEEVENT(3)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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