From b2e1859745b783922533d29e3b03af29378a23f0 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 30 Jul 2008 15:01:44 +0200 Subject: ALSA: hda - Add generic arrays Added helper functions to handle generic arrays. Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'sound/pci/hda/hda_codec.c') diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 19b4530e3ba..e70303183c3 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; +} -- cgit v1.2.3-70-g09d2