projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 71fc4c7e TI |
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 | */ | |
| 18 | void *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 | } | |
| 36 | EXPORT_SYMBOL_GPL(snd_array_new); | |
| 37 | ||
| 38 | /** | |
| 39 | * snd_array_free - free the given array elements | |
| 40 | * @array: the array object | |
| 41 | */ | |
| 42 | void 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 | } | |
| 49 | EXPORT_SYMBOL_GPL(snd_array_free); |