Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_DARRAY_H
3#define _BCACHEFS_DARRAY_H
4
5/*
6 * Dynamic arrays:
7 *
8 * Inspired by CCAN's darray
9 */
10
11#include <linux/cleanup.h>
12#include <linux/slab.h>
13
14#define DARRAY_PREALLOCATED(_type, _nr) \
15struct { \
16 size_t nr, size; \
17 _type *data; \
18 _type preallocated[_nr]; \
19}
20
21#define DARRAY(_type) DARRAY_PREALLOCATED(_type, 0)
22
23typedef DARRAY(char) darray_char;
24typedef DARRAY(char *) darray_str;
25typedef DARRAY(const char *) darray_const_str;
26
27typedef DARRAY(u8) darray_u8;
28typedef DARRAY(u16) darray_u16;
29typedef DARRAY(u32) darray_u32;
30typedef DARRAY(u64) darray_u64;
31
32typedef DARRAY(s8) darray_s8;
33typedef DARRAY(s16) darray_s16;
34typedef DARRAY(s32) darray_s32;
35typedef DARRAY(s64) darray_s64;
36
37int __bch2_darray_resize_noprof(darray_char *, size_t, size_t, gfp_t);
38
39#define __bch2_darray_resize(...) alloc_hooks(__bch2_darray_resize_noprof(__VA_ARGS__))
40
41#define __darray_resize(_d, _element_size, _new_size, _gfp) \
42 (unlikely((_new_size) > (_d)->size) \
43 ? __bch2_darray_resize((_d), (_element_size), (_new_size), (_gfp))\
44 : 0)
45
46#define darray_resize_gfp(_d, _new_size, _gfp) \
47 __darray_resize((darray_char *) (_d), sizeof((_d)->data[0]), (_new_size), _gfp)
48
49#define darray_resize(_d, _new_size) \
50 darray_resize_gfp(_d, _new_size, GFP_KERNEL)
51
52#define darray_make_room_gfp(_d, _more, _gfp) \
53 darray_resize_gfp((_d), (_d)->nr + (_more), _gfp)
54
55#define darray_make_room(_d, _more) \
56 darray_make_room_gfp(_d, _more, GFP_KERNEL)
57
58#define darray_room(_d) ((_d).size - (_d).nr)
59
60#define darray_top(_d) ((_d).data[(_d).nr])
61
62#define darray_push_gfp(_d, _item, _gfp) \
63({ \
64 int _ret = darray_make_room_gfp((_d), 1, _gfp); \
65 \
66 if (!_ret) \
67 (_d)->data[(_d)->nr++] = (_item); \
68 _ret; \
69})
70
71#define darray_push(_d, _item) darray_push_gfp(_d, _item, GFP_KERNEL)
72
73#define darray_pop(_d) ((_d)->data[--(_d)->nr])
74
75#define darray_first(_d) ((_d).data[0])
76#define darray_last(_d) ((_d).data[(_d).nr - 1])
77
78#define darray_insert_item(_d, pos, _item) \
79({ \
80 size_t _pos = (pos); \
81 int _ret = darray_make_room((_d), 1); \
82 \
83 if (!_ret) \
84 array_insert_item((_d)->data, (_d)->nr, _pos, (_item)); \
85 _ret; \
86})
87
88#define darray_remove_item(_d, _pos) \
89 array_remove_item((_d)->data, (_d)->nr, (_pos) - (_d)->data)
90
91#define darray_find_p(_d, _i, cond) \
92({ \
93 typeof((_d).data) _ret = NULL; \
94 \
95 darray_for_each(_d, _i) \
96 if (cond) { \
97 _ret = _i; \
98 break; \
99 } \
100 _ret; \
101})
102
103#define darray_find(_d, _item) darray_find_p(_d, _i, *_i == _item)
104
105/* Iteration: */
106
107#define __darray_for_each(_d, _i) \
108 for ((_i) = (_d).data; _i < (_d).data + (_d).nr; _i++)
109
110#define darray_for_each(_d, _i) \
111 for (typeof(&(_d).data[0]) _i = (_d).data; _i < (_d).data + (_d).nr; _i++)
112
113#define darray_for_each_reverse(_d, _i) \
114 for (typeof(&(_d).data[0]) _i = (_d).data + (_d).nr - 1; _i >= (_d).data && (_d).nr; --_i)
115
116/* Init/exit */
117
118#define darray_init(_d) \
119do { \
120 (_d)->nr = 0; \
121 (_d)->size = ARRAY_SIZE((_d)->preallocated); \
122 (_d)->data = (_d)->size ? (_d)->preallocated : NULL; \
123} while (0)
124
125#define darray_exit(_d) \
126do { \
127 if (!ARRAY_SIZE((_d)->preallocated) || \
128 (_d)->data != (_d)->preallocated) \
129 kvfree((_d)->data); \
130 darray_init(_d); \
131} while (0)
132
133#define DEFINE_DARRAY_CLASS(_type) \
134DEFINE_CLASS(_type, _type, darray_exit(&(_T)), (_type) {}, void)
135
136#define DEFINE_DARRAY(_type) \
137typedef DARRAY(_type) darray_##_type; \
138DEFINE_DARRAY_CLASS(darray_##_type)
139
140#define DEFINE_DARRAY_NAMED(_name, _type) \
141typedef DARRAY(_type) _name; \
142DEFINE_DARRAY_CLASS(_name)
143
144DEFINE_DARRAY_CLASS(darray_char);
145DEFINE_DARRAY_CLASS(darray_str)
146DEFINE_DARRAY_CLASS(darray_const_str)
147
148DEFINE_DARRAY_CLASS(darray_u8)
149DEFINE_DARRAY_CLASS(darray_u16)
150DEFINE_DARRAY_CLASS(darray_u32)
151DEFINE_DARRAY_CLASS(darray_u64)
152
153DEFINE_DARRAY_CLASS(darray_s8)
154DEFINE_DARRAY_CLASS(darray_s16)
155DEFINE_DARRAY_CLASS(darray_s32)
156DEFINE_DARRAY_CLASS(darray_s64)
157
158#endif /* _BCACHEFS_DARRAY_H */