app: add function to get current core ID

Change-Id: I3428fc9944f7117facc6488489187dcf8b6ed825
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

include/spdk/event.h

@@ -198,6 +198,11 @@ uint64_t spdk_app_get_core_mask(void);
  */
 int spdk_app_get_core_count(void);
 
+/**
+ * \brief Return the lcore of the current thread.
+ */
+uint32_t spdk_app_get_current_core(void);
+
 /**
  * \brief Allocate an event to be passed to \ref spdk_event_call
  */

lib/event/reactor.c

@@ -361,6 +361,12 @@ spdk_app_get_core_count(void)
 	return g_reactor_count;
 }
 
+uint32_t
+spdk_app_get_current_core(void)
+{
+	return rte_lcore_id();
+}
+
 int
 spdk_app_parse_core_mask(const char *mask, uint64_t *cpumask)
 {