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libperf: Introduce perf_evlist__purge()

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Add a static perf_evlist__purge() function to purge evsels from a evlist.

Add also perf_evlist__for_each_entry_safe() which is used by
perf_evlist__purge().

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-26-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-10-07 14:53:33 +02:00 committed by Arnaldo Carvalho de Melo
parent 93dd6e2831
commit 696f27c994
2 changed files with 31 additions and 0 deletions
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13
tools/perf/lib/evlist.c
View File

@ -109,6 +109,18 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
static void perf_evlist__purge(struct perf_evlist *evlist)
{
struct perf_evsel *pos, *n;
perf_evlist__for_each_entry_safe(evlist, n, pos) {
list_del_init(&pos->node);
perf_evsel__delete(pos);
}
evlist->nr_entries = 0;
}
void perf_evlist__exit(struct perf_evlist *evlist)
{
perf_cpu_map__put(evlist->cpus);
@ -125,6 +137,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
perf_evlist__munmap(evlist);
perf_evlist__close(evlist);
perf_evlist__purge(evlist);
perf_evlist__exit(evlist);
free(evlist);
}

18
tools/perf/lib/include/internal/evlist.h
View File

@ -82,6 +82,24 @@ void perf_evlist__exit(struct perf_evlist *evlist);
#define perf_evlist__for_each_entry_reverse(evlist, evsel) \
__perf_evlist__for_each_entry_reverse(&(evlist)->entries, evsel)
/**
* __perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
* @list: list_head instance to iterate
* @tmp: struct evsel temp iterator
* @evsel: struct evsel iterator
*/
#define __perf_evlist__for_each_entry_safe(list, tmp, evsel) \
list_for_each_entry_safe(evsel, tmp, list, node)
/**
* perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
* @evlist: evlist instance to iterate
* @evsel: struct evsel iterator
* @tmp: struct evsel temp iterator
*/
#define perf_evlist__for_each_entry_safe(evlist, tmp, evsel) \
__perf_evlist__for_each_entry_safe(&(evlist)->entries, tmp, evsel)
static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
{
return list_entry(evlist->entries.next, struct perf_evsel, node);