diff options
Diffstat (limited to 'tools/lib/perf/cpumap.c')
| -rw-r--r-- | tools/lib/perf/cpumap.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c index 4adcd7920d033d..cae799ad44e136 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 = { |