diff options
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 34 | ||||
| -rw-r--r-- | sound/pci/hda/hda_codec.h | 20 |
2 files changed, 54 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 19b4530e3baf..e70303183c3c 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3196,3 +3196,37 @@ int snd_hda_codecs_inuse(struct hda_bus *bus) } #endif #endif + +/* + * generic arrays + */ + +/* get a new element from the given array + * if it exceeds the pre-allocated array size, re-allocate the array + */ +void *snd_array_new(struct snd_array *array) +{ + if (array->used >= array->alloced) { + int num = array->alloced + array->alloc_align; + void *nlist = kcalloc(num + 1, array->elem_size, GFP_KERNEL); + if (!nlist) + return NULL; + if (array->list) { + memcpy(nlist, array->list, + array->elem_size * array->alloced); + kfree(array->list); + } + array->list = nlist; + array->alloced = num; + } + return array->list + (array->used++ * array->elem_size); +} + +/* free the given array elements */ +void snd_array_free(struct snd_array *array) +{ + kfree(array->list); + array->used = 0; + array->alloced = 0; + array->list = NULL; +} diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 70e8fa09273d..b9b21766b730 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -520,6 +520,26 @@ enum { #define HDA_MAX_CODEC_ADDRESS 0x0f /* + * generic arrays + */ +struct snd_array { + unsigned int used; + unsigned int alloced; + unsigned int elem_size; + unsigned int alloc_align; + void *list; +}; + +void *snd_array_new(struct snd_array *array); +void snd_array_free(struct snd_array *array); +static inline void snd_array_init(struct snd_array *array, unsigned int size, + unsigned int align) +{ + array->elem_size = size; + array->alloc_align = align; +} + +/* * Structures */ |