RTE_RING_QUEUE_VARIABLE /* Enq/Deq as many items as possible from ring */
};
-#ifdef RTE_LIBRTE_RING_DEBUG
-/**
- * A structure that stores the ring statistics (per-lcore).
- */
-struct rte_ring_debug_stats {
- uint64_t enq_success_bulk; /**< Successful enqueues number. */
- uint64_t enq_success_objs; /**< Objects successfully enqueued. */
- uint64_t enq_quota_bulk; /**< Successful enqueues above watermark. */
- uint64_t enq_quota_objs; /**< Objects enqueued above watermark. */
- uint64_t enq_fail_bulk; /**< Failed enqueues number. */
- uint64_t enq_fail_objs; /**< Objects that failed to be enqueued. */
- uint64_t deq_success_bulk; /**< Successful dequeues number. */
- uint64_t deq_success_objs; /**< Objects successfully dequeued. */
- uint64_t deq_fail_bulk; /**< Failed dequeues number. */
- uint64_t deq_fail_objs; /**< Objects that failed to be dequeued. */
-} __rte_cache_aligned;
-#endif
-
#define RTE_RING_MZ_PREFIX "RG_"
/**< The maximum length of a ring name. */
#define RTE_RING_NAMESIZE (RTE_MEMZONE_NAMESIZE - \
sizeof(RTE_RING_MZ_PREFIX) + 1)
-#ifndef RTE_RING_PAUSE_REP_COUNT
-#define RTE_RING_PAUSE_REP_COUNT 0 /**< Yield after pause num of times, no yield
- * if RTE_RING_PAUSE_REP not defined. */
-#endif
-
struct rte_memzone; /* forward declaration, so as not to require memzone.h */
#if RTE_CACHE_LINE_SIZE < 128
/**< Memzone, if any, containing the rte_ring */
uint32_t size; /**< Size of ring. */
uint32_t mask; /**< Mask (size-1) of ring. */
- uint32_t watermark; /**< Max items before EDQUOT in producer. */
/** Ring producer status. */
struct rte_ring_headtail prod __rte_aligned(PROD_ALIGN);
/** Ring consumer status. */
struct rte_ring_headtail cons __rte_aligned(CONS_ALIGN);
-#ifdef RTE_LIBRTE_RING_DEBUG
- struct rte_ring_debug_stats stats[RTE_MAX_LCORE];
-#endif
-
void *ring[] __rte_cache_aligned; /**< Memory space of ring starts here.
* not volatile so need to be careful
* about compiler re-ordering */
#define RING_F_SP_ENQ 0x0001 /**< The default enqueue is "single-producer". */
#define RING_F_SC_DEQ 0x0002 /**< The default dequeue is "single-consumer". */
-#define RTE_RING_QUOT_EXCEED (1 << 31) /**< Quota exceed for burst ops */
#define RTE_RING_SZ_MASK (unsigned)(0x0fffffff) /**< Ring size mask */
-/**
- * @internal When debug is enabled, store ring statistics.
- * @param r
- * A pointer to the ring.
- * @param name
- * The name of the statistics field to increment in the ring.
- * @param n
- * The number to add to the object-oriented statistics.
- */
-#ifdef RTE_LIBRTE_RING_DEBUG
-#define __RING_STAT_ADD(r, name, n) do { \
- unsigned __lcore_id = rte_lcore_id(); \
- if (__lcore_id < RTE_MAX_LCORE) { \
- r->stats[__lcore_id].name##_objs += n; \
- r->stats[__lcore_id].name##_bulk += 1; \
- } \
- } while(0)
-#else
-#define __RING_STAT_ADD(r, name, n) do {} while(0)
-#endif
+/* @internal defines for passing to the enqueue dequeue worker functions */
+#define __IS_SP 1
+#define __IS_MP 0
+#define __IS_SC 1
+#define __IS_MC 0
/**
* Calculate the memory size needed for a ring
*/
void rte_ring_free(struct rte_ring *r);
-/**
- * Change the high water mark.
- *
- * If *count* is 0, water marking is disabled. Otherwise, it is set to the
- * *count* value. The *count* value must be greater than 0 and less
- * than the ring size.
- *
- * This function can be called at any time (not necessarily at
- * initialization).
- *
- * @param r
- * A pointer to the ring structure.
- * @param count
- * The new water mark value.
- * @return
- * - 0: Success; water mark changed.
- * - -EINVAL: Invalid water mark value.
- */
-int rte_ring_set_water_mark(struct rte_ring *r, unsigned count);
-
/**
* Dump the status of the ring to a file.
*
* Placed here since identical code needed in both
* single and multi producer enqueue functions */
#define ENQUEUE_PTRS() do { \
+ unsigned int i; \
const uint32_t size = r->size; \
- uint32_t idx = prod_head & mask; \
+ uint32_t idx = prod_head & r->mask; \
if (likely(idx + n < size)) { \
for (i = 0; i < (n & ((~(unsigned)0x3))); i+=4, idx+=4) { \
r->ring[idx] = obj_table[i]; \
* Placed here since identical code needed in both
* single and multi consumer dequeue functions */
#define DEQUEUE_PTRS() do { \
- uint32_t idx = cons_head & mask; \
+ unsigned int i; \
+ uint32_t idx = cons_head & r->mask; \
const uint32_t size = r->size; \
if (likely(idx + n < size)) { \
for (i = 0; i < (n & (~(unsigned)0x3)); i+=4, idx+=4) {\
} \
} while (0)
+static inline __attribute__((always_inline)) void
+update_tail(struct rte_ring_headtail *ht, uint32_t old_val, uint32_t new_val,
+ uint32_t single)
+{
+ /*
+ * If there are other enqueues/dequeues in progress that preceded us,
+ * we need to wait for them to complete
+ */
+ if (!single)
+ while (unlikely(ht->tail != old_val))
+ rte_pause();
+
+ ht->tail = new_val;
+}
+
/**
- * @internal Enqueue several objects on the ring (multi-producers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * producer index atomically.
+ * @internal This function updates the producer head for enqueue
*
* @param r
- * A pointer to the ring structure.
- * @param obj_table
- * A pointer to a table of void * pointers (objects).
+ * A pointer to the ring structure
+ * @param is_sp
+ * Indicates whether multi-producer path is needed or not
* @param n
- * The number of objects to add in the ring from the obj_table.
+ * The number of elements we will want to enqueue, i.e. how far should the
+ * head be moved
* @param behavior
* RTE_RING_QUEUE_FIXED: Enqueue a fixed number of items from a ring
- * RTE_RING_QUEUE_VARIABLE: Enqueue as many items a possible from ring
+ * RTE_RING_QUEUE_VARIABLE: Enqueue as many items as possible from ring
+ * @param old_head
+ * Returns head value as it was before the move, i.e. where enqueue starts
+ * @param new_head
+ * Returns the current/new head value i.e. where enqueue finishes
+ * @param free_entries
+ * Returns the amount of free space in the ring BEFORE head was moved
* @return
- * Depend on the behavior value
- * if behavior = RTE_RING_QUEUE_FIXED
- * - 0: Success; objects enqueue.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
- * - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
- * if behavior = RTE_RING_QUEUE_VARIABLE
- * - n: Actual number of objects enqueued.
+ * Actual number of objects enqueued.
+ * If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
*/
-static inline int __attribute__((always_inline))
-__rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
- unsigned n, enum rte_ring_queue_behavior behavior)
+static inline __attribute__((always_inline)) unsigned int
+__rte_ring_move_prod_head(struct rte_ring *r, int is_sp,
+ unsigned int n, enum rte_ring_queue_behavior behavior,
+ uint32_t *old_head, uint32_t *new_head,
+ uint32_t *free_entries)
{
- uint32_t prod_head, prod_next;
- uint32_t cons_tail, free_entries;
- const unsigned max = n;
+ const uint32_t mask = r->mask;
+ unsigned int max = n;
int success;
- unsigned i, rep = 0;
- uint32_t mask = r->mask;
- int ret;
- /* Avoid the unnecessary cmpset operation below, which is also
- * potentially harmful when n equals 0. */
- if (n == 0)
- return 0;
-
- /* move prod.head atomically */
do {
/* Reset n to the initial burst count */
n = max;
- prod_head = r->prod.head;
- cons_tail = r->cons.tail;
+ *old_head = r->prod.head;
+ const uint32_t cons_tail = r->cons.tail;
/* The subtraction is done between two unsigned 32bits value
* (the result is always modulo 32 bits even if we have
- * prod_head > cons_tail). So 'free_entries' is always between 0
+ * *old_head > cons_tail). So 'free_entries' is always between 0
* and size(ring)-1. */
- free_entries = (mask + cons_tail - prod_head);
+ *free_entries = (mask + cons_tail - *old_head);
/* check that we have enough room in ring */
- if (unlikely(n > free_entries)) {
- if (behavior == RTE_RING_QUEUE_FIXED) {
- __RING_STAT_ADD(r, enq_fail, n);
- return -ENOBUFS;
- }
- else {
- /* No free entry available */
- if (unlikely(free_entries == 0)) {
- __RING_STAT_ADD(r, enq_fail, n);
- return 0;
- }
-
- n = free_entries;
- }
- }
-
- prod_next = prod_head + n;
- success = rte_atomic32_cmpset(&r->prod.head, prod_head,
- prod_next);
+ if (unlikely(n > *free_entries))
+ n = (behavior == RTE_RING_QUEUE_FIXED) ?
+ 0 : *free_entries;
+
+ if (n == 0)
+ return 0;
+
+ *new_head = *old_head + n;
+ if (is_sp)
+ r->prod.head = *new_head, success = 1;
+ else
+ success = rte_atomic32_cmpset(&r->prod.head,
+ *old_head, *new_head);
} while (unlikely(success == 0));
-
- /* write entries in ring */
- ENQUEUE_PTRS();
- rte_smp_wmb();
-
- /* if we exceed the watermark */
- if (unlikely(((mask + 1) - free_entries + n) > r->watermark)) {
- ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
- (int)(n | RTE_RING_QUOT_EXCEED);
- __RING_STAT_ADD(r, enq_quota, n);
- }
- else {
- ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
- __RING_STAT_ADD(r, enq_success, n);
- }
-
- /*
- * If there are other enqueues in progress that preceded us,
- * we need to wait for them to complete
- */
- while (unlikely(r->prod.tail != prod_head)) {
- rte_pause();
-
- /* Set RTE_RING_PAUSE_REP_COUNT to avoid spin too long waiting
- * for other thread finish. It gives pre-empted thread a chance
- * to proceed and finish with ring dequeue operation. */
- if (RTE_RING_PAUSE_REP_COUNT &&
- ++rep == RTE_RING_PAUSE_REP_COUNT) {
- rep = 0;
- sched_yield();
- }
- }
- r->prod.tail = prod_next;
- return ret;
+ return n;
}
/**
- * @internal Enqueue several objects on a ring (NOT multi-producers safe).
+ * @internal Enqueue several objects on the ring
*
- * @param r
+ * @param r
* A pointer to the ring structure.
* @param obj_table
* A pointer to a table of void * pointers (objects).
* The number of objects to add in the ring from the obj_table.
* @param behavior
* RTE_RING_QUEUE_FIXED: Enqueue a fixed number of items from a ring
- * RTE_RING_QUEUE_VARIABLE: Enqueue as many items a possible from ring
+ * RTE_RING_QUEUE_VARIABLE: Enqueue as many items as possible from ring
+ * @param is_sp
+ * Indicates whether to use single producer or multi-producer head update
+ * @param free_space
+ * returns the amount of space after the enqueue operation has finished
* @return
- * Depend on the behavior value
- * if behavior = RTE_RING_QUEUE_FIXED
- * - 0: Success; objects enqueue.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
- * - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
- * if behavior = RTE_RING_QUEUE_VARIABLE
- * - n: Actual number of objects enqueued.
+ * Actual number of objects enqueued.
+ * If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
*/
-static inline int __attribute__((always_inline))
-__rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
- unsigned n, enum rte_ring_queue_behavior behavior)
+static inline __attribute__((always_inline)) unsigned int
+__rte_ring_do_enqueue(struct rte_ring *r, void * const *obj_table,
+ unsigned int n, enum rte_ring_queue_behavior behavior,
+ int is_sp, unsigned int *free_space)
{
- uint32_t prod_head, cons_tail;
- uint32_t prod_next, free_entries;
- unsigned i;
- uint32_t mask = r->mask;
- int ret;
-
- prod_head = r->prod.head;
- cons_tail = r->cons.tail;
- /* The subtraction is done between two unsigned 32bits value
- * (the result is always modulo 32 bits even if we have
- * prod_head > cons_tail). So 'free_entries' is always between 0
- * and size(ring)-1. */
- free_entries = mask + cons_tail - prod_head;
-
- /* check that we have enough room in ring */
- if (unlikely(n > free_entries)) {
- if (behavior == RTE_RING_QUEUE_FIXED) {
- __RING_STAT_ADD(r, enq_fail, n);
- return -ENOBUFS;
- }
- else {
- /* No free entry available */
- if (unlikely(free_entries == 0)) {
- __RING_STAT_ADD(r, enq_fail, n);
- return 0;
- }
-
- n = free_entries;
- }
- }
-
- prod_next = prod_head + n;
- r->prod.head = prod_next;
-
- /* write entries in ring */
+ uint32_t prod_head, prod_next;
+ uint32_t free_entries;
+
+ n = __rte_ring_move_prod_head(r, is_sp, n, behavior,
+ &prod_head, &prod_next, &free_entries);
+ if (n == 0)
+ goto end;
+
ENQUEUE_PTRS();
rte_smp_wmb();
- /* if we exceed the watermark */
- if (unlikely(((mask + 1) - free_entries + n) > r->watermark)) {
- ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
- (int)(n | RTE_RING_QUOT_EXCEED);
- __RING_STAT_ADD(r, enq_quota, n);
- }
- else {
- ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
- __RING_STAT_ADD(r, enq_success, n);
- }
-
- r->prod.tail = prod_next;
- return ret;
+ update_tail(&r->prod, prod_head, prod_next, is_sp);
+end:
+ if (free_space != NULL)
+ *free_space = free_entries - n;
+ return n;
}
/**
- * @internal Dequeue several objects from a ring (multi-consumers safe). When
- * the request objects are more than the available objects, only dequeue the
- * actual number of objects
- *
- * This function uses a "compare and set" instruction to move the
- * consumer index atomically.
+ * @internal This function updates the consumer head for dequeue
*
* @param r
- * A pointer to the ring structure.
- * @param obj_table
- * A pointer to a table of void * pointers (objects) that will be filled.
+ * A pointer to the ring structure
+ * @param is_sc
+ * Indicates whether multi-consumer path is needed or not
* @param n
- * The number of objects to dequeue from the ring to the obj_table.
+ * The number of elements we will want to enqueue, i.e. how far should the
+ * head be moved
* @param behavior
* RTE_RING_QUEUE_FIXED: Dequeue a fixed number of items from a ring
- * RTE_RING_QUEUE_VARIABLE: Dequeue as many items a possible from ring
+ * RTE_RING_QUEUE_VARIABLE: Dequeue as many items as possible from ring
+ * @param old_head
+ * Returns head value as it was before the move, i.e. where dequeue starts
+ * @param new_head
+ * Returns the current/new head value i.e. where dequeue finishes
+ * @param entries
+ * Returns the number of entries in the ring BEFORE head was moved
* @return
- * Depend on the behavior value
- * if behavior = RTE_RING_QUEUE_FIXED
- * - 0: Success; objects dequeued.
- * - -ENOENT: Not enough entries in the ring to dequeue; no object is
- * dequeued.
- * if behavior = RTE_RING_QUEUE_VARIABLE
- * - n: Actual number of objects dequeued.
+ * - Actual number of objects dequeued.
+ * If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
*/
-
-static inline int __attribute__((always_inline))
-__rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
- unsigned n, enum rte_ring_queue_behavior behavior)
+static inline __attribute__((always_inline)) unsigned int
+__rte_ring_move_cons_head(struct rte_ring *r, int is_sc,
+ unsigned int n, enum rte_ring_queue_behavior behavior,
+ uint32_t *old_head, uint32_t *new_head,
+ uint32_t *entries)
{
- uint32_t cons_head, prod_tail;
- uint32_t cons_next, entries;
- const unsigned max = n;
+ unsigned int max = n;
int success;
- unsigned i, rep = 0;
- uint32_t mask = r->mask;
-
- /* Avoid the unnecessary cmpset operation below, which is also
- * potentially harmful when n equals 0. */
- if (n == 0)
- return 0;
/* move cons.head atomically */
do {
/* Restore n as it may change every loop */
n = max;
- cons_head = r->cons.head;
- prod_tail = r->prod.tail;
+ *old_head = r->cons.head;
+ const uint32_t prod_tail = r->prod.tail;
/* The subtraction is done between two unsigned 32bits value
* (the result is always modulo 32 bits even if we have
* cons_head > prod_tail). So 'entries' is always between 0
* and size(ring)-1. */
- entries = (prod_tail - cons_head);
+ *entries = (prod_tail - *old_head);
/* Set the actual entries for dequeue */
- if (n > entries) {
- if (behavior == RTE_RING_QUEUE_FIXED) {
- __RING_STAT_ADD(r, deq_fail, n);
- return -ENOENT;
- }
- else {
- if (unlikely(entries == 0)){
- __RING_STAT_ADD(r, deq_fail, n);
- return 0;
- }
-
- n = entries;
- }
- }
-
- cons_next = cons_head + n;
- success = rte_atomic32_cmpset(&r->cons.head, cons_head,
- cons_next);
+ if (n > *entries)
+ n = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : *entries;
+
+ if (unlikely(n == 0))
+ return 0;
+
+ *new_head = *old_head + n;
+ if (is_sc)
+ r->cons.head = *new_head, success = 1;
+ else
+ success = rte_atomic32_cmpset(&r->cons.head, *old_head,
+ *new_head);
} while (unlikely(success == 0));
-
- /* copy in table */
- DEQUEUE_PTRS();
- rte_smp_rmb();
-
- /*
- * If there are other dequeues in progress that preceded us,
- * we need to wait for them to complete
- */
- while (unlikely(r->cons.tail != cons_head)) {
- rte_pause();
-
- /* Set RTE_RING_PAUSE_REP_COUNT to avoid spin too long waiting
- * for other thread finish. It gives pre-empted thread a chance
- * to proceed and finish with ring dequeue operation. */
- if (RTE_RING_PAUSE_REP_COUNT &&
- ++rep == RTE_RING_PAUSE_REP_COUNT) {
- rep = 0;
- sched_yield();
- }
- }
- __RING_STAT_ADD(r, deq_success, n);
- r->cons.tail = cons_next;
-
- return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
+ return n;
}
/**
- * @internal Dequeue several objects from a ring (NOT multi-consumers safe).
- * When the request objects are more than the available objects, only dequeue
- * the actual number of objects
+ * @internal Dequeue several objects from the ring
*
* @param r
* A pointer to the ring structure.
* @param obj_table
- * A pointer to a table of void * pointers (objects) that will be filled.
+ * A pointer to a table of void * pointers (objects).
* @param n
- * The number of objects to dequeue from the ring to the obj_table.
+ * The number of objects to pull from the ring.
* @param behavior
* RTE_RING_QUEUE_FIXED: Dequeue a fixed number of items from a ring
- * RTE_RING_QUEUE_VARIABLE: Dequeue as many items a possible from ring
+ * RTE_RING_QUEUE_VARIABLE: Dequeue as many items as possible from ring
+ * @param is_sc
+ * Indicates whether to use single consumer or multi-consumer head update
+ * @param available
+ * returns the number of remaining ring entries after the dequeue has finished
* @return
- * Depend on the behavior value
- * if behavior = RTE_RING_QUEUE_FIXED
- * - 0: Success; objects dequeued.
- * - -ENOENT: Not enough entries in the ring to dequeue; no object is
- * dequeued.
- * if behavior = RTE_RING_QUEUE_VARIABLE
- * - n: Actual number of objects dequeued.
+ * - Actual number of objects dequeued.
+ * If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
*/
-static inline int __attribute__((always_inline))
-__rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
- unsigned n, enum rte_ring_queue_behavior behavior)
+static inline __attribute__((always_inline)) unsigned int
+__rte_ring_do_dequeue(struct rte_ring *r, void **obj_table,
+ unsigned int n, enum rte_ring_queue_behavior behavior,
+ int is_sc, unsigned int *available)
{
- uint32_t cons_head, prod_tail;
- uint32_t cons_next, entries;
- unsigned i;
- uint32_t mask = r->mask;
-
- cons_head = r->cons.head;
- prod_tail = r->prod.tail;
- /* The subtraction is done between two unsigned 32bits value
- * (the result is always modulo 32 bits even if we have
- * cons_head > prod_tail). So 'entries' is always between 0
- * and size(ring)-1. */
- entries = prod_tail - cons_head;
-
- if (n > entries) {
- if (behavior == RTE_RING_QUEUE_FIXED) {
- __RING_STAT_ADD(r, deq_fail, n);
- return -ENOENT;
- }
- else {
- if (unlikely(entries == 0)){
- __RING_STAT_ADD(r, deq_fail, n);
- return 0;
- }
-
- n = entries;
- }
- }
-
- cons_next = cons_head + n;
- r->cons.head = cons_next;
-
- /* copy in table */
+ uint32_t cons_head, cons_next;
+ uint32_t entries;
+
+ n = __rte_ring_move_cons_head(r, is_sc, n, behavior,
+ &cons_head, &cons_next, &entries);
+ if (n == 0)
+ goto end;
+
DEQUEUE_PTRS();
rte_smp_rmb();
- __RING_STAT_ADD(r, deq_success, n);
- r->cons.tail = cons_next;
- return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
+ update_tail(&r->cons, cons_head, cons_next, is_sc);
+
+end:
+ if (available != NULL)
+ *available = entries - n;
+ return n;
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
- * - 0: Success; objects enqueue.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
- * - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
+ * The number of objects enqueued, either 0 or n
*/
-static inline int __attribute__((always_inline))
+static inline unsigned int __attribute__((always_inline))
rte_ring_mp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- return __rte_ring_mp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
+ return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ __IS_MP, free_space);
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
- * - 0: Success; objects enqueued.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
- * - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
+ * The number of objects enqueued, either 0 or n
*/
-static inline int __attribute__((always_inline))
+static inline unsigned int __attribute__((always_inline))
rte_ring_sp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- return __rte_ring_sp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
+ return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ __IS_SP, free_space);
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
- * - 0: Success; objects enqueued.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
- * - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
+ * The number of objects enqueued, either 0 or n
*/
-static inline int __attribute__((always_inline))
+static inline unsigned int __attribute__((always_inline))
rte_ring_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- if (r->prod.single)
- return rte_ring_sp_enqueue_bulk(r, obj_table, n);
- else
- return rte_ring_mp_enqueue_bulk(r, obj_table, n);
+ return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ r->prod.single, free_space);
}
/**
* A pointer to the object to be added.
* @return
* - 0: Success; objects enqueued.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
* - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
*/
static inline int __attribute__((always_inline))
rte_ring_mp_enqueue(struct rte_ring *r, void *obj)
{
- return rte_ring_mp_enqueue_bulk(r, &obj, 1);
+ return rte_ring_mp_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
}
/**
* A pointer to the object to be added.
* @return
* - 0: Success; objects enqueued.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
* - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
*/
static inline int __attribute__((always_inline))
rte_ring_sp_enqueue(struct rte_ring *r, void *obj)
{
- return rte_ring_sp_enqueue_bulk(r, &obj, 1);
+ return rte_ring_sp_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
}
/**
* A pointer to the object to be added.
* @return
* - 0: Success; objects enqueued.
- * - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- * high water mark is exceeded.
* - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
*/
static inline int __attribute__((always_inline))
rte_ring_enqueue(struct rte_ring *r, void *obj)
{
- if (r->prod.single)
- return rte_ring_sp_enqueue(r, obj);
- else
- return rte_ring_mp_enqueue(r, obj);
+ return rte_ring_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
}
/**
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
- * - 0: Success; objects dequeued.
- * - -ENOENT: Not enough entries in the ring to dequeue; no object is
- * dequeued.
+ * The number of objects dequeued, either 0 or n
*/
-static inline int __attribute__((always_inline))
-rte_ring_mc_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
+static inline unsigned int __attribute__((always_inline))
+rte_ring_mc_dequeue_bulk(struct rte_ring *r, void **obj_table,
+ unsigned int n, unsigned int *available)
{
- return __rte_ring_mc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
+ return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ __IS_MC, available);
}
/**
* @param n
* The number of objects to dequeue from the ring to the obj_table,
* must be strictly positive.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
- * - 0: Success; objects dequeued.
- * - -ENOENT: Not enough entries in the ring to dequeue; no object is
- * dequeued.
+ * The number of objects dequeued, either 0 or n
*/
-static inline int __attribute__((always_inline))
-rte_ring_sc_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
+static inline unsigned int __attribute__((always_inline))
+rte_ring_sc_dequeue_bulk(struct rte_ring *r, void **obj_table,
+ unsigned int n, unsigned int *available)
{
- return __rte_ring_sc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
+ return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ __IS_SC, available);
}
/**
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
- * - 0: Success; objects dequeued.
- * - -ENOENT: Not enough entries in the ring to dequeue, no object is
- * dequeued.
+ * The number of objects dequeued, either 0 or n
*/
-static inline int __attribute__((always_inline))
-rte_ring_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
+static inline unsigned int __attribute__((always_inline))
+rte_ring_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned int n,
+ unsigned int *available)
{
- if (r->cons.single)
- return rte_ring_sc_dequeue_bulk(r, obj_table, n);
- else
- return rte_ring_mc_dequeue_bulk(r, obj_table, n);
+ return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+ r->cons.single, available);
}
/**
static inline int __attribute__((always_inline))
rte_ring_mc_dequeue(struct rte_ring *r, void **obj_p)
{
- return rte_ring_mc_dequeue_bulk(r, obj_p, 1);
+ return rte_ring_mc_dequeue_bulk(r, obj_p, 1, NULL) ? 0 : -ENOBUFS;
}
/**
static inline int __attribute__((always_inline))
rte_ring_sc_dequeue(struct rte_ring *r, void **obj_p)
{
- return rte_ring_sc_dequeue_bulk(r, obj_p, 1);
+ return rte_ring_sc_dequeue_bulk(r, obj_p, 1, NULL) ? 0 : -ENOBUFS;
}
/**
static inline int __attribute__((always_inline))
rte_ring_dequeue(struct rte_ring *r, void **obj_p)
{
- if (r->cons.single)
- return rte_ring_sc_dequeue(r, obj_p);
- else
- return rte_ring_mc_dequeue(r, obj_p);
+ return rte_ring_dequeue_bulk(r, obj_p, 1, NULL) ? 0 : -ENOBUFS;
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
* - n: Actual number of objects enqueued.
*/
static inline unsigned __attribute__((always_inline))
rte_ring_mp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- return __rte_ring_mp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
+ return __rte_ring_do_enqueue(r, obj_table, n,
+ RTE_RING_QUEUE_VARIABLE, __IS_MP, free_space);
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
* - n: Actual number of objects enqueued.
*/
static inline unsigned __attribute__((always_inline))
rte_ring_sp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- return __rte_ring_sp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
+ return __rte_ring_do_enqueue(r, obj_table, n,
+ RTE_RING_QUEUE_VARIABLE, __IS_SP, free_space);
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ * if non-NULL, returns the amount of space in the ring after the
+ * enqueue operation has finished.
* @return
* - n: Actual number of objects enqueued.
*/
static inline unsigned __attribute__((always_inline))
rte_ring_enqueue_burst(struct rte_ring *r, void * const *obj_table,
- unsigned n)
+ unsigned int n, unsigned int *free_space)
{
- if (r->prod.single)
- return rte_ring_sp_enqueue_burst(r, obj_table, n);
- else
- return rte_ring_mp_enqueue_burst(r, obj_table, n);
+ return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE,
+ r->prod.single, free_space);
}
/**
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
* - n: Actual number of objects dequeued, 0 if ring is empty
*/
static inline unsigned __attribute__((always_inline))
-rte_ring_mc_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
+rte_ring_mc_dequeue_burst(struct rte_ring *r, void **obj_table,
+ unsigned int n, unsigned int *available)
{
- return __rte_ring_mc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
+ return __rte_ring_do_dequeue(r, obj_table, n,
+ RTE_RING_QUEUE_VARIABLE, __IS_MC, available);
}
/**
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
* - n: Actual number of objects dequeued, 0 if ring is empty
*/
static inline unsigned __attribute__((always_inline))
-rte_ring_sc_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
+rte_ring_sc_dequeue_burst(struct rte_ring *r, void **obj_table,
+ unsigned int n, unsigned int *available)
{
- return __rte_ring_sc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
+ return __rte_ring_do_dequeue(r, obj_table, n,
+ RTE_RING_QUEUE_VARIABLE, __IS_SC, available);
}
/**
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ * If non-NULL, returns the number of remaining ring entries after the
+ * dequeue has finished.
* @return
* - Number of objects dequeued
*/
static inline unsigned __attribute__((always_inline))
-rte_ring_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
+rte_ring_dequeue_burst(struct rte_ring *r, void **obj_table,
+ unsigned int n, unsigned int *available)
{
- if (r->cons.single)
- return rte_ring_sc_dequeue_burst(r, obj_table, n);
- else
- return rte_ring_mc_dequeue_burst(r, obj_table, n);
+ return __rte_ring_do_dequeue(r, obj_table, n,
+ RTE_RING_QUEUE_VARIABLE,
+ r->cons.single, available);
}
#ifdef __cplusplus