Cregit: Linux 7.1: cpumap.h

Contributors: 7
Author	Tokens	Token Proportion	Commits	Commit Proportion
Ian Rogers	43	37.07%	7	36.84%
Jiri Olsa	38	32.76%	6	31.58%
Arnaldo Carvalho de Melo	27	23.28%	2	10.53%
Mark Rutland	4	3.45%	1	5.26%
Paul Mackerras	2	1.72%	1	5.26%
Greg Kroah-Hartman	1	0.86%	1	5.26%
Elena Reshetova	1	0.86%	1	5.26%
Total	116		19

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LIBPERF_INTERNAL_CPUMAP_H
#define __LIBPERF_INTERNAL_CPUMAP_H

#include <linux/refcount.h>
#include <perf/cpumap.h>
#include <internal/rc_check.h>

/**
 * A sized, reference counted, sorted array of integers representing CPU
 * numbers. This is commonly used to capture which CPUs a PMU is associated
 * with. The indices into the cpumap are frequently used as they avoid having
 * gaps if CPU numbers were used. For events associated with a pid, rather than
 * a CPU, a single dummy map with an entry of -1 is used.
 */
DECLARE_RC_STRUCT(perf_cpu_map) {
	refcount_t	refcnt;
	/** Length of the map array. */
	unsigned int	nr;
	/** The CPU values. */
	struct perf_cpu	map[];
};

struct perf_cpu_map *perf_cpu_map__alloc(unsigned int nr_cpus);
int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu);
bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b);

void perf_cpu_map__set_nr(struct perf_cpu_map *map, unsigned int nr_cpus);

static inline refcount_t *perf_cpu_map__refcnt(struct perf_cpu_map *map)
{
	return &RC_CHK_ACCESS(map)->refcnt;
}
#endif /* __LIBPERF_INTERNAL_CPUMAP_H */