Function dlb2_bitmap_alloc

dpdk/drivers/event/dlb2/pf/base/dlb2_osdep_bitmap.h:41–80

* dlb2_bitmap_alloc() - alloc a bitmap data structure * @bitmap: pointer to dlb2_bitmap structure pointer. * @len: number of entries in the bitmap. * * This function allocates a bitmap and initializes it with length @len. All * entries are initially zero. * * Return: * Returns 0 upon success, < 0 otherwise. * * Errors: * EINVAL - bitmap is NULL or len is 0. * ENOMEM - could not allocat

 * ENOMEM - could not allocate memory for the bitmap data structure.
 */
static inline int dlb2_bitmap_alloc(struct dlb2_bitmap **bitmap,
				    unsigned int len)
{
	struct dlb2_bitmap *bm;
	void *mem;
	uint32_t alloc_size;
	uint32_t nbits = (uint32_t)len;

	if (bitmap == NULL || nbits == 0)
		return -EINVAL;

	/* Allocate DLB2 bitmap control struct */
	bm = rte_malloc("DLB2_PF",
			sizeof(struct dlb2_bitmap),
			RTE_CACHE_LINE_SIZE);

	if (bm == NULL)
		return -ENOMEM;

	/* Allocate bitmap memory */
	alloc_size = rte_bitmap_get_memory_footprint(nbits);
	mem = rte_malloc("DLB2_PF_BITMAP", alloc_size, RTE_CACHE_LINE_SIZE);
	if (mem == NULL) {
		rte_free(bm);
		return -ENOMEM;
	}

	bm->map = rte_bitmap_init(len, mem, alloc_size);
	if (bm->map == NULL) {
		rte_free(mem);
		rte_free(bm);
		return -ENOMEM;
	}

	bm->len = len;

	*bitmap = bm;

	return 0;
}

/**
 * dlb2_bitmap_free() - free a previously allocated bitmap data structure