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99 lines
2.5 KiB
99 lines
2.5 KiB
libtraceevent(3) |
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================ |
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NAME |
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---- |
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tep_get_event, tep_get_first_event, tep_get_events_count - Access events. |
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SYNOPSIS |
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-------- |
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[verse] |
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-- |
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*#include <event-parse.h>* |
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struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_); |
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struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_); |
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int *tep_get_events_count*(struct tep_handle pass:[*]_tep_); |
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-- |
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DESCRIPTION |
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----------- |
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The _tep_get_event()_ function returns a pointer to event at the given _index_. |
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The _tep_ argument is trace event parser context, the _index_ is the index of |
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the requested event. |
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The _tep_get_first_event()_ function returns a pointer to the first event. |
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As events are stored in an array, this function returns the pointer to the |
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beginning of the array. The _tep_ argument is trace event parser context. |
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The _tep_get_events_count()_ function returns the number of the events |
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in the array. The _tep_ argument is trace event parser context. |
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RETURN VALUE |
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------------ |
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The _tep_get_event()_ returns a pointer to the event located at _index_. |
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NULL is returned in case of error, in case there are no events or _index_ is |
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out of range. |
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The _tep_get_first_event()_ returns a pointer to the first event. NULL is |
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returned in case of error, or in case there are no events. |
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The _tep_get_events_count()_ returns the number of the events. 0 is |
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returned in case of error, or in case there are no events. |
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EXAMPLE |
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------- |
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[source,c] |
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#include <event-parse.h> |
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... |
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struct tep_handle *tep = tep_alloc(); |
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... |
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int i,count = tep_get_events_count(tep); |
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struct tep_event *event, *events = tep_get_first_event(tep); |
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if (events == NULL) { |
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/* There are no events */ |
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} else { |
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for (i = 0; i < count; i++) { |
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event = (events+i); |
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/* process events[i] */ |
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} |
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/* Get the last event */ |
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event = tep_get_event(tep, count-1); |
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} |
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-- |
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FILES |
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----- |
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[verse] |
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-- |
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*event-parse.h* |
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Header file to include in order to have access to the library APIs. |
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*-ltraceevent* |
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Linker switch to add when building a program that uses the library. |
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-- |
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SEE ALSO |
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-------- |
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_libtraceevent(3)_, _trace-cmd(1)_ |
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AUTHOR |
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------ |
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[verse] |
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-- |
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*Steven Rostedt* <[email protected]>, author of *libtraceevent*. |
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*Tzvetomir Stoyanov* <[email protected]>, author of this man page. |
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-- |
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REPORTING BUGS |
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-------------- |
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Report bugs to <[email protected]> |
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LICENSE |
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------- |
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libtraceevent is Free Software licensed under the GNU LGPL 2.1 |
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RESOURCES |
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--------- |
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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