a101957649
Fixes for various checkpatch errors. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BCACHEFS_FIFO_H
|
|
#define _BCACHEFS_FIFO_H
|
|
|
|
#include "util.h"
|
|
|
|
#define FIFO(type) \
|
|
struct { \
|
|
size_t front, back, size, mask; \
|
|
type *data; \
|
|
}
|
|
|
|
#define DECLARE_FIFO(type, name) FIFO(type) name
|
|
|
|
#define fifo_buf_size(fifo) \
|
|
((fifo)->size \
|
|
? roundup_pow_of_two((fifo)->size) * sizeof((fifo)->data[0]) \
|
|
: 0)
|
|
|
|
#define init_fifo(fifo, _size, _gfp) \
|
|
({ \
|
|
(fifo)->front = (fifo)->back = 0; \
|
|
(fifo)->size = (_size); \
|
|
(fifo)->mask = (fifo)->size \
|
|
? roundup_pow_of_two((fifo)->size) - 1 \
|
|
: 0; \
|
|
(fifo)->data = kvpmalloc(fifo_buf_size(fifo), (_gfp)); \
|
|
})
|
|
|
|
#define free_fifo(fifo) \
|
|
do { \
|
|
kvpfree((fifo)->data, fifo_buf_size(fifo)); \
|
|
(fifo)->data = NULL; \
|
|
} while (0)
|
|
|
|
#define fifo_swap(l, r) \
|
|
do { \
|
|
swap((l)->front, (r)->front); \
|
|
swap((l)->back, (r)->back); \
|
|
swap((l)->size, (r)->size); \
|
|
swap((l)->mask, (r)->mask); \
|
|
swap((l)->data, (r)->data); \
|
|
} while (0)
|
|
|
|
#define fifo_move(dest, src) \
|
|
do { \
|
|
typeof(*((dest)->data)) _t; \
|
|
while (!fifo_full(dest) && \
|
|
fifo_pop(src, _t)) \
|
|
fifo_push(dest, _t); \
|
|
} while (0)
|
|
|
|
#define fifo_used(fifo) (((fifo)->back - (fifo)->front))
|
|
#define fifo_free(fifo) ((fifo)->size - fifo_used(fifo))
|
|
|
|
#define fifo_empty(fifo) ((fifo)->front == (fifo)->back)
|
|
#define fifo_full(fifo) (fifo_used(fifo) == (fifo)->size)
|
|
|
|
#define fifo_peek_front(fifo) ((fifo)->data[(fifo)->front & (fifo)->mask])
|
|
#define fifo_peek_back(fifo) ((fifo)->data[((fifo)->back - 1) & (fifo)->mask])
|
|
|
|
#define fifo_entry_idx_abs(fifo, p) \
|
|
((((p) >= &fifo_peek_front(fifo) \
|
|
? (fifo)->front : (fifo)->back) & ~(fifo)->mask) + \
|
|
(((p) - (fifo)->data)))
|
|
|
|
#define fifo_entry_idx(fifo, p) (((p) - &fifo_peek_front(fifo)) & (fifo)->mask)
|
|
#define fifo_idx_entry(fifo, i) ((fifo)->data[((fifo)->front + (i)) & (fifo)->mask])
|
|
|
|
#define fifo_push_back_ref(f) \
|
|
(fifo_full((f)) ? NULL : &(f)->data[(f)->back++ & (f)->mask])
|
|
|
|
#define fifo_push_front_ref(f) \
|
|
(fifo_full((f)) ? NULL : &(f)->data[--(f)->front & (f)->mask])
|
|
|
|
#define fifo_push_back(fifo, new) \
|
|
({ \
|
|
typeof((fifo)->data) _r = fifo_push_back_ref(fifo); \
|
|
if (_r) \
|
|
*_r = (new); \
|
|
_r != NULL; \
|
|
})
|
|
|
|
#define fifo_push_front(fifo, new) \
|
|
({ \
|
|
typeof((fifo)->data) _r = fifo_push_front_ref(fifo); \
|
|
if (_r) \
|
|
*_r = (new); \
|
|
_r != NULL; \
|
|
})
|
|
|
|
#define fifo_pop_front(fifo, i) \
|
|
({ \
|
|
bool _r = !fifo_empty((fifo)); \
|
|
if (_r) \
|
|
(i) = (fifo)->data[(fifo)->front++ & (fifo)->mask]; \
|
|
_r; \
|
|
})
|
|
|
|
#define fifo_pop_back(fifo, i) \
|
|
({ \
|
|
bool _r = !fifo_empty((fifo)); \
|
|
if (_r) \
|
|
(i) = (fifo)->data[--(fifo)->back & (fifo)->mask]; \
|
|
_r; \
|
|
})
|
|
|
|
#define fifo_push_ref(fifo) fifo_push_back_ref(fifo)
|
|
#define fifo_push(fifo, i) fifo_push_back(fifo, (i))
|
|
#define fifo_pop(fifo, i) fifo_pop_front(fifo, (i))
|
|
#define fifo_peek(fifo) fifo_peek_front(fifo)
|
|
|
|
#define fifo_for_each_entry(_entry, _fifo, _iter) \
|
|
for (typecheck(typeof((_fifo)->front), _iter), \
|
|
(_iter) = (_fifo)->front; \
|
|
((_iter != (_fifo)->back) && \
|
|
(_entry = (_fifo)->data[(_iter) & (_fifo)->mask], true)); \
|
|
(_iter)++)
|
|
|
|
#define fifo_for_each_entry_ptr(_ptr, _fifo, _iter) \
|
|
for (typecheck(typeof((_fifo)->front), _iter), \
|
|
(_iter) = (_fifo)->front; \
|
|
((_iter != (_fifo)->back) && \
|
|
(_ptr = &(_fifo)->data[(_iter) & (_fifo)->mask], true)); \
|
|
(_iter)++)
|
|
|
|
#endif /* _BCACHEFS_FIFO_H */
|