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 */
16DECLARE_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
24struct perf_cpu_map *perf_cpu_map__alloc(int nr_cpus);
25int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu);
26bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b);
27
28void perf_cpu_map__set_nr(struct perf_cpu_map *map, int nr_cpus);
29
30static 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 */