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52 lines
1.2 KiB
52 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* generic arrays |
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*/ |
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#include <linux/slab.h> |
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#include <sound/core.h> |
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#include <sound/hdaudio.h> |
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/** |
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* snd_array_new - get a new element from the given array |
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* @array: the array object |
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* |
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* Get a new element from the given array. If it exceeds the |
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* pre-allocated array size, re-allocate the array. |
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* |
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* Returns NULL if allocation failed. |
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*/ |
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void *snd_array_new(struct snd_array *array) |
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{ |
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if (snd_BUG_ON(!array->elem_size)) |
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return NULL; |
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if (array->used >= array->alloced) { |
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int num = array->alloced + array->alloc_align; |
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int oldsize = array->alloced * array->elem_size; |
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int size = (num + 1) * array->elem_size; |
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void *nlist; |
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if (snd_BUG_ON(num >= 4096)) |
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return NULL; |
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nlist = krealloc(array->list, size, GFP_KERNEL); |
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if (!nlist) |
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return NULL; |
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memset(nlist + oldsize, 0, size - oldsize); |
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array->list = nlist; |
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array->alloced = num; |
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} |
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return snd_array_elem(array, array->used++); |
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} |
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EXPORT_SYMBOL_GPL(snd_array_new); |
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/** |
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* snd_array_free - free the given array elements |
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* @array: the array object |
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*/ |
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void snd_array_free(struct snd_array *array) |
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{ |
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kfree(array->list); |
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array->used = 0; |
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array->alloced = 0; |
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array->list = NULL; |
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} |
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EXPORT_SYMBOL_GPL(snd_array_free);
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