GeezerVison is showing codebrowser.dev — string_table.h source code [linux/include/linux/ceph/string_table.h] - Codebrowser

1	/ SPDX-License-Identifier: GPL-2.0 /
2	#ifndef _FS_CEPH_STRING_TABLE_H
3	#define _FS_CEPH_STRING_TABLE_H
4
5	#include <linux/types.h>
6	#include <linux/kref.h>
7	#include <linux/rbtree.h>
8	#include <linux/rcupdate.h>
9
10	struct ceph_string {
11	struct kref kref;
12	union {
13	struct rb_node node;
14	struct rcu_head rcu;
15	};
16	size_t len;
17	char str[];
18	};
19
20	extern void ceph_release_string(struct kref *ref);
21	extern struct ceph_string ceph_find_or_create_string(const* char *str,
22	size_t len);
23	extern bool ceph_strings_empty(void);
24
25	static inline struct ceph_string ceph_get_string(struct* ceph_string *str)
26	{
27	kref_get(kref: &str->kref);
28	return str;
29	}
30
31	static inline void ceph_put_string(struct ceph_string *str)
32	{
33	if (!str)
34	return;
35	kref_put(kref: &str->kref, release: ceph_release_string);
36	}
37
38	static inline int ceph_compare_string(struct ceph_string *cs,
39	const char* str, size_t len)
40	{
41	size_t cs_len = cs ? cs->len : `0`;
42	if (cs_len != len)
43	return cs_len - len;
44	if (len == `0`)
45	return `0`;
46	return strncmp(cs->str, str, len);
47	}
48
49	#define ceph_try_get_string(x) \
50	({ \
51	struct ceph_string *___str; \
52	rcu_read_lock(); \
53	for (;;) { \
54	___str = rcu_dereference(x); \
55	if (!___str \|\| \
56	kref_get_unless_zero(&___str->kref)) \
57	break; \
58	} \
59	rcu_read_unlock(); \
60	(___str); \
61	})
62
63	#endif
64

string_table.h