1 files changed, 159 insertions, 0 deletions
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
new file mode 100644
index 000000000000..f4dc9a208332
--- /dev/null
+++ b/tools/perf/lib/evlist.c
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <perf/evlist.h>
+#include <perf/evsel.h>
+#include <linux/list.h>
+#include <internal/evlist.h>
+#include <internal/evsel.h>
+#include <linux/zalloc.h>
+#include <stdlib.h>
+#include <perf/cpumap.h>
+#include <perf/threadmap.h>
+
+void perf_evlist__init(struct perf_evlist *evlist)
+{
+	INIT_LIST_HEAD(&evlist->entries);
+	evlist->nr_entries = 0;
+}
+
+static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
+					  struct perf_evsel *evsel)
+{
+	/*
+	 * We already have cpus for evsel (via PMU sysfs) so
+	 * keep it, if there's no target cpu list defined.
+	 */
+	if (!evsel->own_cpus || evlist->has_user_cpus) {
+		perf_cpu_map__put(evsel->cpus);
+		evsel->cpus = perf_cpu_map__get(evlist->cpus);
+	} else if (evsel->cpus != evsel->own_cpus) {
+		perf_cpu_map__put(evsel->cpus);
+		evsel->cpus = perf_cpu_map__get(evsel->own_cpus);
+	}
+
+	perf_thread_map__put(evsel->threads);
+	evsel->threads = perf_thread_map__get(evlist->threads);
+}
+
+static void perf_evlist__propagate_maps(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	perf_evlist__for_each_evsel(evlist, evsel)
+		__perf_evlist__propagate_maps(evlist, evsel);
+}
+
+void perf_evlist__add(struct perf_evlist *evlist,
+		      struct perf_evsel *evsel)
+{
+	list_add_tail(&evsel->node, &evlist->entries);
+	evlist->nr_entries += 1;
+	__perf_evlist__propagate_maps(evlist, evsel);
+}
+
+void perf_evlist__remove(struct perf_evlist *evlist,
+			 struct perf_evsel *evsel)
+{
+	list_del_init(&evsel->node);
+	evlist->nr_entries -= 1;
+}
+
+struct perf_evlist *perf_evlist__new(void)
+{
+	struct perf_evlist *evlist = zalloc(sizeof(*evlist));
+
+	if (evlist != NULL)
+		perf_evlist__init(evlist);
+
+	return evlist;
+}
+
+struct perf_evsel *
+perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
+{
+	struct perf_evsel *next;
+
+	if (!prev) {
+		next = list_first_entry(&evlist->entries,
+					struct perf_evsel,
+					node);
+	} else {
+		next = list_next_entry(prev, node);
+	}
+
+	/* Empty list is noticed here so don't need checking on entry. */
+	if (&next->node == &evlist->entries)
+		return NULL;
+
+	return next;
+}
+
+void perf_evlist__delete(struct perf_evlist *evlist)
+{
+	free(evlist);
+}
+
+void perf_evlist__set_maps(struct perf_evlist *evlist,
+			   struct perf_cpu_map *cpus,
+			   struct perf_thread_map *threads)
+{
+	/*
+	 * Allow for the possibility that one or another of the maps isn't being
+	 * changed i.e. don't put it.  Note we are assuming the maps that are
+	 * being applied are brand new and evlist is taking ownership of the
+	 * original reference count of 1.  If that is not the case it is up to
+	 * the caller to increase the reference count.
+	 */
+	if (cpus != evlist->cpus) {
+		perf_cpu_map__put(evlist->cpus);
+		evlist->cpus = perf_cpu_map__get(cpus);
+	}
+
+	if (threads != evlist->threads) {
+		perf_thread_map__put(evlist->threads);
+		evlist->threads = perf_thread_map__get(threads);
+	}
+
+	perf_evlist__propagate_maps(evlist);
+}
+
+int perf_evlist__open(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+	int err;
+
+	perf_evlist__for_each_entry(evlist, evsel) {
+		err = perf_evsel__open(evsel, evsel->cpus, evsel->threads);
+		if (err < 0)
+			goto out_err;
+	}
+
+	return 0;
+
+out_err:
+	perf_evlist__close(evlist);
+	return err;
+}
+
+void perf_evlist__close(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	perf_evlist__for_each_entry_reverse(evlist, evsel)
+		perf_evsel__close(evsel);
+}
+
+void perf_evlist__enable(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	perf_evlist__for_each_entry(evlist, evsel)
+		perf_evsel__enable(evsel);
+}
+
+void perf_evlist__disable(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	perf_evlist__for_each_entry(evlist, evsel)
+		perf_evsel__disable(evsel);
+}