1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_DARRAY_H
3 #define _BCACHEFS_DARRAY_H
8 * Inspired by CCAN's darray
11 #include <linux/slab.h>
13 #define DARRAY(type) \
19 typedef DARRAY(void) darray_void;
21 int __bch2_darray_resize(darray_void *, size_t, size_t, gfp_t);
23 static inline int __darray_resize(darray_void *d, size_t element_size,
24 size_t new_size, gfp_t gfp)
26 return unlikely(new_size > d->size)
27 ? __bch2_darray_resize(d, element_size, new_size, gfp)
31 #define darray_resize_gfp(_d, _new_size, _gfp) \
32 __darray_resize((darray_void *) (_d), sizeof((_d)->data[0]), (_new_size), _gfp)
34 #define darray_resize(_d, _new_size) \
35 darray_resize_gfp(_d, _new_size, GFP_KERNEL)
37 static inline int __darray_make_room(darray_void *d, size_t t_size, size_t more, gfp_t gfp)
39 return __darray_resize(d, t_size, d->nr + more, gfp);
42 #define darray_make_room_gfp(_d, _more, _gfp) \
43 __darray_make_room((darray_void *) (_d), sizeof((_d)->data[0]), (_more), _gfp)
45 #define darray_make_room(_d, _more) \
46 darray_make_room_gfp(_d, _more, GFP_KERNEL)
48 #define darray_room(_d) ((_d).size - (_d).nr)
50 #define darray_top(_d) ((_d).data[(_d).nr])
52 #define darray_push_gfp(_d, _item, _gfp) \
54 int _ret = darray_make_room_gfp((_d), 1, _gfp); \
57 (_d)->data[(_d)->nr++] = (_item); \
61 #define darray_push(_d, _item) darray_push_gfp(_d, _item, GFP_KERNEL)
63 #define darray_pop(_d) ((_d)->data[--(_d)->nr])
65 #define darray_first(_d) ((_d).data[0])
66 #define darray_last(_d) ((_d).data[(_d).nr - 1])
68 #define darray_insert_item(_d, pos, _item) \
70 size_t _pos = (pos); \
71 int _ret = darray_make_room((_d), 1); \
74 array_insert_item((_d)->data, (_d)->nr, _pos, (_item)); \
78 #define darray_remove_item(_d, _pos) \
79 array_remove_item((_d)->data, (_d)->nr, (_pos) - (_d)->data)
81 #define darray_for_each(_d, _i) \
82 for (_i = (_d).data; _i < (_d).data + (_d).nr; _i++)
84 #define darray_for_each_reverse(_d, _i) \
85 for (_i = (_d).data + (_d).nr - 1; _i >= (_d).data; --_i)
87 #define darray_init(_d) \
90 (_d)->nr = (_d)->size = 0; \
93 #define darray_exit(_d) \
99 #endif /* _BCACHEFS_DARRAY_H */