summaryrefslogtreecommitdiff
path: root/tools/lib/perf/cpumap.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/lib/perf/cpumap.c')
-rw-r--r--tools/lib/perf/cpumap.c33
1 files changed, 32 insertions, 1 deletions
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c
index 4adcd7920d03..cae799ad44e1 100644
--- a/tools/lib/perf/cpumap.c
+++ b/tools/lib/perf/cpumap.c
@@ -18,9 +18,13 @@ void perf_cpu_map__set_nr(struct perf_cpu_map *map, int nr_cpus)
struct perf_cpu_map *perf_cpu_map__alloc(int nr_cpus)
{
- RC_STRUCT(perf_cpu_map) *cpus = malloc(sizeof(*cpus) + sizeof(struct perf_cpu) * nr_cpus);
+ RC_STRUCT(perf_cpu_map) *cpus;
struct perf_cpu_map *result;
+ if (nr_cpus == 0)
+ return NULL;
+
+ cpus = malloc(sizeof(*cpus) + sizeof(struct perf_cpu) * nr_cpus);
if (ADD_RC_CHK(result, cpus)) {
cpus->nr = nr_cpus;
refcount_set(&cpus->refcnt, 1);
@@ -316,6 +320,19 @@ bool perf_cpu_map__has_any_cpu_or_is_empty(const struct perf_cpu_map *map)
return map ? __perf_cpu_map__cpu(map, 0).cpu == -1 : true;
}
+bool perf_cpu_map__is_any_cpu_or_is_empty(const struct perf_cpu_map *map)
+{
+ if (!map)
+ return true;
+
+ return __perf_cpu_map__nr(map) == 1 && __perf_cpu_map__cpu(map, 0).cpu == -1;
+}
+
+bool perf_cpu_map__is_empty(const struct perf_cpu_map *map)
+{
+ return map == NULL;
+}
+
int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu)
{
int low, high;
@@ -372,6 +389,20 @@ bool perf_cpu_map__has_any_cpu(const struct perf_cpu_map *map)
return map && __perf_cpu_map__cpu(map, 0).cpu == -1;
}
+struct perf_cpu perf_cpu_map__min(const struct perf_cpu_map *map)
+{
+ struct perf_cpu cpu, result = {
+ .cpu = -1
+ };
+ int idx;
+
+ perf_cpu_map__for_each_cpu_skip_any(cpu, idx, map) {
+ result = cpu;
+ break;
+ }
+ return result;
+}
+
struct perf_cpu perf_cpu_map__max(const struct perf_cpu_map *map)
{
struct perf_cpu result = {