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| 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 */ |
| 35 |
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