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); 50