No need to cast everywhere, define a common macro for this, plus it can be used
in future commits.
Signed-off-by: David Marchand <david.marchand at 6wind.com>
---
lib/librte_eal/common/include/rte_tailq.h | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/lib/librte_eal/common/include/rte_tailq.h
b/lib/librte_eal/common/include/rte_tailq.h
index b34e5ed..6ac4b9b 100644
--- a/lib/librte_eal/common/include/rte_tailq.h
+++ b/lib/librte_eal/common/include/rte_tailq.h
@@ -70,6 +70,12 @@ struct rte_tailq_head {
};
/**
+ * Return the first tailq entry casted to the right struct.
+ */
+#define RTE_TAILQ_CAST(tailq_entry, struct_name) \
+ (struct struct_name *)&(tailq_entry)->tailq_head
+
+/**
* Utility macro to make reserving a tailqueue for a particular struct easier.
*
* @param name
@@ -86,7 +92,7 @@ struct rte_tailq_head {
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_RESERVE(name, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_reserve(name)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_reserve(name), struct_name)
/**
* Utility macro to make reserving a tailqueue for a particular struct easier.
@@ -106,7 +112,7 @@ struct rte_tailq_head {
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_RESERVE_BY_IDX(idx, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_reserve_by_idx(idx)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_reserve_by_idx(idx), struct_name)
/**
* Utility macro to make looking up a tailqueue for a particular struct easier.
@@ -125,7 +131,7 @@ struct rte_tailq_head {
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_LOOKUP(name, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_lookup(name)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_lookup(name), struct_name)
/**
* Utility macro to make looking up a tailqueue for a particular struct easier.
@@ -144,7 +150,7 @@ struct rte_tailq_head {
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_LOOKUP_BY_IDX(idx, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_lookup_by_idx(idx)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_lookup_by_idx(idx), struct_name)
/**
* Reserve a slot in the tailq list for a particular tailq header
--
1.7.10.4
