tools/lib/perf/include/internal/cpumap.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LIBPERF_INTERNAL_CPUMAP_H
   3 #define __LIBPERF_INTERNAL_CPUMAP_H
   4
   5 #include <linux/refcount.h>
   6 #include <perf/cpumap.h>
   7 #include <internal/rc_check.h>
   8
   9 /**
  10  * A sized, reference counted, sorted array of integers representing CPU
  11  * numbers. This is commonly used to capture which CPUs a PMU is associated
  12  * with. The indices into the cpumap are frequently used as they avoid having
  13  * gaps if CPU numbers were used. For events associated with a pid, rather than
  14  * a CPU, a single dummy map with an entry of -1 is used.
  15  */
  16 DECLARE_RC_STRUCT(perf_cpu_map) {
  17         refcount_t      refcnt;
  18         /** Length of the map array. */
  19         int             nr;
  20         /** The CPU values. */
  21         struct perf_cpu map[];
  22 };
  23
  24 struct perf_cpu_map *perf_cpu_map__alloc(int nr_cpus);
  25 int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu);
  26 bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b);
  27
  28 void perf_cpu_map__set_nr(struct perf_cpu_map *map, int nr_cpus);
  29
  30 static inline refcount_t *perf_cpu_map__refcnt(struct perf_cpu_map *map)
  31 {
  32         return &RC_CHK_ACCESS(map)->refcnt;
  33 }
  34 #endif /* __LIBPERF_INTERNAL_CPUMAP_H */