[dpdk-dev] [PATCH] eal: add doc for constructor macros

[Thomas Monjalon <thomas@monjalon.net>]

It is a reminder that the constructors without priority
get the lowest priority.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_eal/common/include/rte_eal.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h
index 0e7363d77..559d2308e 100644
--- a/lib/librte_eal/common/include/rte_eal.h
+++ b/lib/librte_eal/common/include/rte_eal.h
@@ -287,9 +287,26 @@ static inline int rte_gettid(void)
 	return RTE_PER_LCORE(_thread_id);
 }
 
+/**
+ * Run function before main() with low priority.
+ *
+ * The constructor will be run after prioritized constructors.
+ *
+ * @param func
+ *   Constructor function.
+ */
 #define RTE_INIT(func) \
 static void __attribute__((constructor, used)) func(void)
 
+/**
+ * Run function before main() with high priority.
+ *
+ * @param func
+ *   Constructor function.
+ * @param prio
+ *   Priority number must be above 100.
+ *   Lowest number is the first to run.
+ */
 #define RTE_INIT_PRIO(func, prio) \
 static void __attribute__((constructor(prio), used)) func(void)
 
-- 
2.14.1