1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __BPF_UTIL__
 3#define __BPF_UTIL__
 4
 5#include <stdio.h>
 6#include <stdlib.h>
 7#include <string.h>
 8#include <errno.h>
 9#include <bpf/libbpf.h> /* libbpf_num_possible_cpus */
10
11static inline unsigned int bpf_num_possible_cpus(void)
12{
13	int possible_cpus = libbpf_num_possible_cpus();
14
15	if (possible_cpus < 0) {
16		printf("Failed to get # of possible cpus: '%s'!\n",
17		       strerror(-possible_cpus));
18		exit(1);
19	}
20	return possible_cpus;
21}
22
23#define __bpf_percpu_val_align	__attribute__((__aligned__(8)))
24
25#define BPF_DECLARE_PERCPU(type, name)				\
26	struct { type v; /* padding */ } __bpf_percpu_val_align	\
27		name[bpf_num_possible_cpus()]
28#define bpf_percpu(name, cpu) name[(cpu)].v
29
30#ifndef ARRAY_SIZE
31# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
32#endif
33
34#ifndef sizeof_field
35#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
36#endif
37
38#ifndef offsetofend
39#define offsetofend(TYPE, MEMBER) \
40	(offsetof(TYPE, MEMBER)	+ sizeof_field(TYPE, MEMBER))
41#endif
42
43#endif /* __BPF_UTIL__ */