mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/*
|
|
* generic arrays
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <sound/core.h>
|
|
#include <sound/hdaudio.h>
|
|
|
|
/**
|
|
* snd_array_new - get a new element from the given array
|
|
* @array: the array object
|
|
*
|
|
* Get a new element from the given array. If it exceeds the
|
|
* pre-allocated array size, re-allocate the array.
|
|
*
|
|
* Returns NULL if allocation failed.
|
|
*/
|
|
void *snd_array_new(struct snd_array *array)
|
|
{
|
|
if (snd_BUG_ON(!array->elem_size))
|
|
return NULL;
|
|
if (array->used >= array->alloced) {
|
|
int num = array->alloced + array->alloc_align;
|
|
int size = (num + 1) * array->elem_size;
|
|
void *nlist;
|
|
if (snd_BUG_ON(num >= 4096))
|
|
return NULL;
|
|
nlist = krealloc(array->list, size, GFP_KERNEL | __GFP_ZERO);
|
|
if (!nlist)
|
|
return NULL;
|
|
array->list = nlist;
|
|
array->alloced = num;
|
|
}
|
|
return snd_array_elem(array, array->used++);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_array_new);
|
|
|
|
/**
|
|
* snd_array_free - free the given array elements
|
|
* @array: the array object
|
|
*/
|
|
void snd_array_free(struct snd_array *array)
|
|
{
|
|
kfree(array->list);
|
|
array->used = 0;
|
|
array->alloced = 0;
|
|
array->list = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_array_free);
|