Function rte_stack_create

dpdk/lib/stack/rte_stack.c:46–129

}

struct rte_stack *
rte_stack_create(const char *name, unsigned int count, int socket_id,
		 uint32_t flags)
{
	char mz_name[RTE_MEMZONE_NAMESIZE];
	struct rte_stack_list *stack_list;
	const struct rte_memzone *mz;
	struct rte_tailq_entry *te;
	struct rte_stack *s;
	unsigned int sz;
	int ret;

	if (flags & ~(RTE_STACK_F_LF)) {
		STACK_LOG_ERR("Unsupported stack flags %#x", flags);
		return NULL;
	}

#ifdef RTE_ARCH_64
	RTE_BUILD_BUG_ON(sizeof(struct rte_stack_lf_head) != 16);
#endif
#if !defined(RTE_STACK_LF_SUPPORTED)
	if (flags & RTE_STACK_F_LF) {
		STACK_LOG_ERR("Lock-free stack is not supported on your platform");
		rte_errno = ENOTSUP;
		return NULL;
	}
#endif

	sz = rte_stack_get_memsize(count, flags);

	ret = snprintf(mz_name, sizeof(mz_name), "%s%s",
		       RTE_STACK_MZ_PREFIX, name);
	if (ret < 0 || ret >= (int)sizeof(mz_name)) {
		rte_errno = ENAMETOOLONG;
		return NULL;
	}

	te = rte_zmalloc("STACK_TAILQ_ENTRY", sizeof(*te), 0);
	if (te == NULL) {
		STACK_LOG_ERR("Cannot reserve memory for tailq");
		rte_errno = ENOMEM;
		return NULL;
	}

	rte_mcfg_tailq_write_lock();

	mz = rte_memzone_reserve_aligned(mz_name, sz, socket_id,
					 0, __alignof__(*s));
	if (mz == NULL) {
		STACK_LOG_ERR("Cannot reserve stack memzone!");
		rte_mcfg_tailq_write_unlock();
		rte_free(te);
		return NULL;
	}

	s = mz->addr;

	rte_stack_init(s, count, flags);