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