+ * @return
+ * - On success, return 0.
+ * - On failure, return -1, and the reason will be stored in rte_errno.
+ */
+int __rte_experimental
+rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
+ rte_mp_async_reply_t clb);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Send a reply to the peer process.
+ *
+ * This function will send a reply message in response to a request message
+ * received previously.
+ *
+ * @param msg
+ * The msg argument contains the customized message.
+ *
+ * @param peer
+ * The peer argument is the pointer to the peer socket path.
+ *
+ * @return
+ * - On success, return 0.
+ * - On failure, return -1, and the reason will be stored in rte_errno.
+ */
+int __rte_experimental
+rte_mp_reply(struct rte_mp_msg *msg, const char *peer);
+
+/**
+ * Usage function typedef used by the application usage function.
+ *
+ * Use this function typedef to define and call rte_set_application_usage_hook()
+ * routine.
+ */
+typedef void (*rte_usage_hook_t)(const char * prgname);
+
+/**
+ * Add application usage routine callout from the eal_usage() routine.
+ *
+ * This function allows the application to include its usage message
+ * in the EAL system usage message. The routine rte_set_application_usage_hook()
+ * needs to be called before the rte_eal_init() routine in the application.
+ *
+ * This routine is optional for the application and will behave as if the set
+ * routine was never called as the default behavior.
+ *
+ * @param usage_func
+ * The func argument is a function pointer to the application usage routine.
+ * Called function is defined using rte_usage_hook_t typedef, which is of
+ * the form void rte_usage_func(const char * prgname).
+ *
+ * Calling this routine with a NULL value will reset the usage hook routine and
+ * return the current value, which could be NULL.
+ * @return
+ * - Returns the current value of the rte_application_usage pointer to allow
+ * the caller to daisy chain the usage routines if needing more then one.
+ */
+rte_usage_hook_t
+rte_set_application_usage_hook(rte_usage_hook_t usage_func);
+
+/**
+ * macro to get the lock of tailq in mem_config
+ */
+#define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock)
+
+/**
+ * macro to get the multiple lock of mempool shared by mutiple-instance
+ */
+#define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock)
+
+/**
+ * Whether EAL is using huge pages (disabled by --no-huge option).
+ * The no-huge mode cannot be used with UIO poll-mode drivers like igb/ixgbe.
+ * It is useful for NIC drivers (e.g. librte_pmd_mlx4, librte_pmd_vmxnet3) or
+ * crypto drivers (e.g. librte_crypto_nitrox) provided by third-parties such
+ * as 6WIND.
+ *
+ * @return
+ * Nonzero if hugepages are enabled.
+ */
+int rte_eal_has_hugepages(void);
+
+/**
+ * Whether EAL is using PCI bus.
+ * Disabled by --no-pci option.
+ *
+ * @return
+ * Nonzero if the PCI bus is enabled.
+ */
+int rte_eal_has_pci(void);
+
+/**
+ * Whether the EAL was asked to create UIO device.
+ *
+ * @return
+ * Nonzero if true.
+ */
+int rte_eal_create_uio_dev(void);
+
+/**
+ * The user-configured vfio interrupt mode.
+ *
+ * @return
+ * Interrupt mode configured with the command line,
+ * RTE_INTR_MODE_NONE by default.
+ */
+enum rte_intr_mode rte_eal_vfio_intr_mode(void);
+
+/**
+ * A wrap API for syscall gettid.
+ *
+ * @return
+ * On success, returns the thread ID of calling process.
+ * It is always successful.
+ */
+int rte_sys_gettid(void);
+
+/**
+ * Get system unique thread id.
+ *
+ * @return
+ * On success, returns the thread ID of calling process.
+ * It is always successful.
+ */
+static inline int rte_gettid(void)
+{
+ static RTE_DEFINE_PER_LCORE(int, _thread_id) = -1;
+ if (RTE_PER_LCORE(_thread_id) == -1)
+ RTE_PER_LCORE(_thread_id) = rte_sys_gettid();
+ return RTE_PER_LCORE(_thread_id);
+}
+
+/**
+ * Get the iova mode
+ *
+ * @return
+ * enum rte_iova_mode value.
+ */
+enum rte_iova_mode rte_eal_iova_mode(void);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Get user provided pool ops name for mbuf
+ *
+ * @return
+ * returns user provided pool ops name.