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 oldsize = array->alloced * array->elem_size;
25		int size = (num + 1) * array->elem_size;
26		void *nlist;
27		if (snd_BUG_ON(num >= 4096))
28			return NULL;
29		nlist = krealloc(array->list, size, GFP_KERNEL);
30		if (!nlist)
31			return NULL;
32		memset(nlist + oldsize, 0, size - oldsize);
33		array->list = nlist;
34		array->alloced = num;
35	}
36	return snd_array_elem(array, array->used++);
37}
38EXPORT_SYMBOL_GPL(snd_array_new);
39
40/**
41 * snd_array_free - free the given array elements
42 * @array: the array object
43 */
44void snd_array_free(struct snd_array *array)
45{
46	kfree(array->list);
47	array->used = 0;
48	array->alloced = 0;
49	array->list = NULL;
50}
51EXPORT_SYMBOL_GPL(snd_array_free);