1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 Copyright © 2014 Michal Schmidt
11 typedef void (*hash_func_t
)(const void *p
, struct siphash
*state
);
12 typedef int (*compare_func_t
)(const void *a
, const void *b
);
16 compare_func_t compare
;
19 void string_hash_func(const void *p
, struct siphash
*state
);
20 int string_compare_func(const void *a
, const void *b
) _pure_
;
21 extern const struct hash_ops string_hash_ops
;
23 void path_hash_func(const void *p
, struct siphash
*state
);
24 int path_compare_func(const void *a
, const void *b
) _pure_
;
25 extern const struct hash_ops path_hash_ops
;
27 /* This will compare the passed pointers directly, and will not dereference them. This is hence not useful for strings
29 void trivial_hash_func(const void *p
, struct siphash
*state
);
30 int trivial_compare_func(const void *a
, const void *b
) _const_
;
31 extern const struct hash_ops trivial_hash_ops
;
33 /* 32bit values we can always just embed in the pointer itself, but in order to support 32bit archs we need store 64bit
34 * values indirectly, since they don't fit in a pointer. */
35 void uint64_hash_func(const void *p
, struct siphash
*state
);
36 int uint64_compare_func(const void *a
, const void *b
) _pure_
;
37 extern const struct hash_ops uint64_hash_ops
;
39 /* On some archs dev_t is 32bit, and on others 64bit. And sometimes it's 64bit on 32bit archs, and sometimes 32bit on
40 * 64bit archs. Yuck! */
42 void devt_hash_func(const void *p
, struct siphash
*state
) _pure_
;
43 int devt_compare_func(const void *a
, const void *b
) _pure_
;
44 extern const struct hash_ops devt_hash_ops
;
46 #define devt_hash_func uint64_hash_func
47 #define devt_compare_func uint64_compare_func
48 #define devt_hash_ops uint64_hash_ops