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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_DARRAY_H
#define _BCACHEFS_DARRAY_H
/*
* Dynamic arrays:
*
* Inspired by CCAN's darray
*/
#include <linux/cleanup.h>
#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;
typedef DARRAY(const char *) darray_const_str;
typedef DARRAY(u8) darray_u8;
typedef DARRAY(u16) darray_u16;
typedef DARRAY(u32) darray_u32;
typedef DARRAY(u64) darray_u64;
typedef DARRAY(s8) darray_s8;
typedef DARRAY(s16) darray_s16;
typedef DARRAY(s32) darray_s32;
typedef DARRAY(s64) darray_s64;
int __bch2_darray_resize_noprof(darray_char *, size_t, size_t, gfp_t);
#define __bch2_darray_resize(...) alloc_hooks(__bch2_darray_resize_noprof(__VA_ARGS__))
#define __darray_resize(_d, _element_size, _new_size, _gfp) \
(unlikely((_new_size) > (_d)->size) \
? __bch2_darray_resize((_d), (_element_size), (_new_size), (_gfp))\
: 0)
#define darray_resize_gfp(_d, _new_size, _gfp) \
__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)
#define darray_make_room_gfp(_d, _more, _gfp) \
darray_resize_gfp((_d), (_d)->nr + (_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_find_p(_d, _i, cond) \
({ \
typeof((_d).data) _ret = NULL; \
\
darray_for_each(_d, _i) \
if (cond) { \
_ret = _i; \
break; \
} \
_ret; \
})
#define darray_find(_d, _item) darray_find_p(_d, _i, *_i == _item)
/* Iteration: */
#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 && (_d).nr; --_i)
/* Init/exit */
#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)
#define DEFINE_DARRAY_CLASS(_type) \
DEFINE_CLASS(_type, _type, darray_exit(&(_T)), (_type) {}, void)
#define DEFINE_DARRAY(_type) \
typedef DARRAY(_type) darray_##_type; \
DEFINE_DARRAY_CLASS(darray_##_type)
#define DEFINE_DARRAY_NAMED(_name, _type) \
typedef DARRAY(_type) _name; \
DEFINE_DARRAY_CLASS(_name)
DEFINE_DARRAY_CLASS(darray_char);
DEFINE_DARRAY_CLASS(darray_str)
DEFINE_DARRAY_CLASS(darray_const_str)
DEFINE_DARRAY_CLASS(darray_u8)
DEFINE_DARRAY_CLASS(darray_u16)
DEFINE_DARRAY_CLASS(darray_u32)
DEFINE_DARRAY_CLASS(darray_u64)
DEFINE_DARRAY_CLASS(darray_s8)
DEFINE_DARRAY_CLASS(darray_s16)
DEFINE_DARRAY_CLASS(darray_s32)
DEFINE_DARRAY_CLASS(darray_s64)
#endif /* _BCACHEFS_DARRAY_H */
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