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