1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <stdlib.h>
 3
 4#define PAGE_SIZE 4096
 5
 6#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 7
 8#define MB(x) (x << 20)
 9
10/*
11 * Checks if two given values differ by less than err% of their sum.
12 */
13static inline int values_close(long a, long b, int err)
14{
15	return abs(a - b) <= (a + b) / 100 * err;
16}
17
18extern int cg_find_unified_root(char *root, size_t len);
19extern char *cg_name(const char *root, const char *name);
20extern char *cg_name_indexed(const char *root, const char *name, int index);
21extern char *cg_control(const char *cgroup, const char *control);
22extern int cg_create(const char *cgroup);
23extern int cg_destroy(const char *cgroup);
24extern int cg_read(const char *cgroup, const char *control,
25		   char *buf, size_t len);
26extern int cg_read_strcmp(const char *cgroup, const char *control,
27			  const char *expected);
28extern int cg_read_strstr(const char *cgroup, const char *control,
29			  const char *needle);
30extern long cg_read_long(const char *cgroup, const char *control);
31long cg_read_key_long(const char *cgroup, const char *control, const char *key);
32extern int cg_write(const char *cgroup, const char *control, char *buf);
33extern int cg_run(const char *cgroup,
34		  int (*fn)(const char *cgroup, void *arg),
35		  void *arg);
36extern int cg_enter(const char *cgroup, int pid);
37extern int cg_enter_current(const char *cgroup);
38extern int cg_run_nowait(const char *cgroup,
39			 int (*fn)(const char *cgroup, void *arg),
40			 void *arg);
41extern int get_temp_fd(void);
42extern int alloc_pagecache(int fd, size_t size);
43extern int alloc_anon(const char *cgroup, void *arg);
44extern int is_swap_enabled(void);
45extern int set_oom_adj_score(int pid, int score);
46extern int cg_wait_for_proc_count(const char *cgroup, int count);
47extern int cg_killall(const char *cgroup);
48extern char proc_read_text(int pid, const char *item, char *buf, size_t size);