remove extra parentheses in return statement

[dpdk.git] / lib / librte_ring / rte_ring.h

diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index af68888..943c97c 100644 (file)
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -134,6 +134,8 @@ struct rte_ring_debug_stats {
                                     *   if RTE_RING_PAUSE_REP not defined. */
 #endif
 
+struct rte_memzone; /* forward declaration, so as not to require memzone.h */
+
 /**
  * An RTE ring structure.
  *
@@ -147,6 +149,8 @@ struct rte_ring_debug_stats {
 struct rte_ring {
        char name[RTE_RING_NAMESIZE];    /**< Name of the ring. */
        int flags;                       /**< Flags supplied at creation. */
+       const struct rte_memzone *memzone;
+                       /**< Memzone, if any, containing the rte_ring */
 
        /** Ring producer status. */
        struct prod {
@@ -300,6 +304,13 @@ int rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
  */
 struct rte_ring *rte_ring_create(const char *name, unsigned count,
                                 int socket_id, unsigned flags);
+/**
+ * De-allocate all memory used by the ring.
+ *
+ * @param r
+ *   Ring to free
+ */
+void rte_ring_free(struct rte_ring *r);
 
 /**
  * Change the high water mark.
@@ -457,7 +468,7 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 
        /* write entries in ring */
        ENQUEUE_PTRS();
-       rte_compiler_barrier();
+       rte_smp_wmb();
 
        /* if we exceed the watermark */
        if (unlikely(((mask + 1) - free_entries + n) > r->prod.watermark)) {
@@ -552,7 +563,7 @@ __rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 
        /* write entries in ring */
        ENQUEUE_PTRS();
-       rte_compiler_barrier();
+       rte_smp_wmb();
 
        /* if we exceed the watermark */
        if (unlikely(((mask + 1) - free_entries + n) > r->prod.watermark)) {
@@ -643,7 +654,7 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
 
        /* copy in table */
        DEQUEUE_PTRS();
-       rte_compiler_barrier();
+       rte_smp_rmb();
 
        /*
         * If there are other dequeues in progress that preceded us,
@@ -727,7 +738,7 @@ __rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
 
        /* copy in table */
        DEQUEUE_PTRS();
-       rte_compiler_barrier();
+       rte_smp_rmb();
 
        __RING_STAT_ADD(r, deq_success, n);
        r->cons.tail = cons_next;
@@ -1026,7 +1037,7 @@ rte_ring_full(const struct rte_ring *r)
 {
        uint32_t prod_tail = r->prod.tail;
        uint32_t cons_tail = r->cons.tail;
-       return (((cons_tail - prod_tail - 1) & r->prod.mask) == 0);
+       return ((cons_tail - prod_tail - 1) & r->prod.mask) == 0;
 }
 
 /**
@@ -1059,7 +1070,7 @@ rte_ring_count(const struct rte_ring *r)
 {
        uint32_t prod_tail = r->prod.tail;
        uint32_t cons_tail = r->cons.tail;
-       return ((prod_tail - cons_tail) & r->prod.mask);
+       return (prod_tail - cons_tail) & r->prod.mask;
 }
 
 /**
@@ -1075,7 +1086,7 @@ rte_ring_free_count(const struct rte_ring *r)
 {
        uint32_t prod_tail = r->prod.tail;
        uint32_t cons_tail = r->cons.tail;
-       return ((cons_tail - prod_tail - 1) & r->prod.mask);
+       return (cons_tail - prod_tail - 1) & r->prod.mask;
 }
 
 /**