1/*
 2 * generic arrays
 3 */
 4
 5#include <linux/slab.h>
 6#include <sound/core.h>
 7#include <sound/hdaudio.h>
 8
 9/**
10 * snd_array_new - get a new element from the given array
11 * @array: the array object
12 *
13 * Get a new element from the given array.  If it exceeds the
14 * pre-allocated array size, re-allocate the array.
15 *
16 * Returns NULL if allocation failed.
17 */
18void *snd_array_new(struct snd_array *array)
19{
20	if (snd_BUG_ON(!array->elem_size))
21		return NULL;
22	if (array->used >= array->alloced) {
23		int num = array->alloced + array->alloc_align;
 
24		int size = (num + 1) * array->elem_size;
25		void *nlist;
26		if (snd_BUG_ON(num >= 4096))
27			return NULL;
28		nlist = krealloc(array->list, size, GFP_KERNEL | __GFP_ZERO);
29		if (!nlist)
30			return NULL;
 
31		array->list = nlist;
32		array->alloced = num;
33	}
34	return snd_array_elem(array, array->used++);
35}
36EXPORT_SYMBOL_GPL(snd_array_new);
37
38/**
39 * snd_array_free - free the given array elements
40 * @array: the array object
41 */
42void snd_array_free(struct snd_array *array)
43{
44	kfree(array->list);
45	array->used = 0;
46	array->alloced = 0;
47	array->list = NULL;
48}
49EXPORT_SYMBOL_GPL(snd_array_free);

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * generic arrays
 4 */
 5
 6#include <linux/slab.h>
 7#include <sound/core.h>
 8#include <sound/hdaudio.h>
 9
10/**
11 * snd_array_new - get a new element from the given array
12 * @array: the array object
13 *
14 * Get a new element from the given array.  If it exceeds the
15 * pre-allocated array size, re-allocate the array.
16 *
17 * Returns NULL if allocation failed.
18 */
19void *snd_array_new(struct snd_array *array)
20{
21	if (snd_BUG_ON(!array->elem_size))
22		return NULL;
23	if (array->used >= array->alloced) {
24		int num = array->alloced + array->alloc_align;
25		int oldsize = array->alloced * array->elem_size;
26		int size = (num + 1) * array->elem_size;
27		void *nlist;
28		if (snd_BUG_ON(num >= 4096))
29			return NULL;
30		nlist = krealloc(array->list, size, GFP_KERNEL);
31		if (!nlist)
32			return NULL;
33		memset(nlist + oldsize, 0, size - oldsize);
34		array->list = nlist;
35		array->alloced = num;
36	}
37	return snd_array_elem(array, array->used++);
38}
39EXPORT_SYMBOL_GPL(snd_array_new);
40
41/**
42 * snd_array_free - free the given array elements
43 * @array: the array object
44 */
45void snd_array_free(struct snd_array *array)
46{
47	kfree(array->list);
48	array->used = 0;
49	array->alloced = 0;
50	array->list = NULL;
51}
52EXPORT_SYMBOL_GPL(snd_array_free);