+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _BCACHEFS_DARRAY_H
-#define _BCACHEFS_DARRAY_H
-
-/*
- * Dynamic arrays:
- *
- * Inspired by CCAN's darray
- */
-
-#include <linux/slab.h>
-
-#define DARRAY_PREALLOCATED(_type, _nr) \
-struct { \
- size_t nr, size; \
- _type *data; \
- _type preallocated[_nr]; \
-}
-
-#define DARRAY(_type) DARRAY_PREALLOCATED(_type, 0)
-
-typedef DARRAY(char) darray_char;
-typedef DARRAY(char *) darray_str;
-
-int __bch2_darray_resize(darray_char *, size_t, size_t, gfp_t);
-
-static inline int __darray_resize(darray_char *d, size_t element_size,
- size_t new_size, gfp_t gfp)
-{
- return unlikely(new_size > d->size)
- ? __bch2_darray_resize(d, element_size, new_size, gfp)
- : 0;
-}
-
-#define darray_resize_gfp(_d, _new_size, _gfp) \
- unlikely(__darray_resize((darray_char *) (_d), sizeof((_d)->data[0]), (_new_size), _gfp))
-
-#define darray_resize(_d, _new_size) \
- darray_resize_gfp(_d, _new_size, GFP_KERNEL)
-
-static inline int __darray_make_room(darray_char *d, size_t t_size, size_t more, gfp_t gfp)
-{
- return __darray_resize(d, t_size, d->nr + more, gfp);
-}
-
-#define darray_make_room_gfp(_d, _more, _gfp) \
- __darray_make_room((darray_char *) (_d), sizeof((_d)->data[0]), (_more), _gfp)
-
-#define darray_make_room(_d, _more) \
- darray_make_room_gfp(_d, _more, GFP_KERNEL)
-
-#define darray_room(_d) ((_d).size - (_d).nr)
-
-#define darray_top(_d) ((_d).data[(_d).nr])
-
-#define darray_push_gfp(_d, _item, _gfp) \
-({ \
- int _ret = darray_make_room_gfp((_d), 1, _gfp); \
- \
- if (!_ret) \
- (_d)->data[(_d)->nr++] = (_item); \
- _ret; \
-})
-
-#define darray_push(_d, _item) darray_push_gfp(_d, _item, GFP_KERNEL)
-
-#define darray_pop(_d) ((_d)->data[--(_d)->nr])
-
-#define darray_first(_d) ((_d).data[0])
-#define darray_last(_d) ((_d).data[(_d).nr - 1])
-
-#define darray_insert_item(_d, pos, _item) \
-({ \
- size_t _pos = (pos); \
- int _ret = darray_make_room((_d), 1); \
- \
- if (!_ret) \
- array_insert_item((_d)->data, (_d)->nr, _pos, (_item)); \
- _ret; \
-})
-
-#define darray_remove_item(_d, _pos) \
- array_remove_item((_d)->data, (_d)->nr, (_pos) - (_d)->data)
-
-#define __darray_for_each(_d, _i) \
- for ((_i) = (_d).data; _i < (_d).data + (_d).nr; _i++)
-
-#define darray_for_each(_d, _i) \
- for (typeof(&(_d).data[0]) _i = (_d).data; _i < (_d).data + (_d).nr; _i++)
-
-#define darray_for_each_reverse(_d, _i) \
- for (typeof(&(_d).data[0]) _i = (_d).data + (_d).nr - 1; _i >= (_d).data; --_i)
-
-#define darray_init(_d) \
-do { \
- (_d)->nr = 0; \
- (_d)->size = ARRAY_SIZE((_d)->preallocated); \
- (_d)->data = (_d)->size ? (_d)->preallocated : NULL; \
-} while (0)
-
-#define darray_exit(_d) \
-do { \
- if (!ARRAY_SIZE((_d)->preallocated) || \
- (_d)->data != (_d)->preallocated) \
- kvfree((_d)->data); \
- darray_init(_d); \
-} while (0)
-
-#endif /* _BCACHEFS_DARRAY_H */