1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/* Copyright (c) 2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_RING_MPMC_INTERNAL_H_
#define ODP_RING_MPMC_INTERNAL_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/api/queue.h>
#include <odp_debug_internal.h>
#include <rte_config.h>
#include <rte_ring.h>
#include <rte_errno.h>
/* Lock-free ring for multi-producer / multi-consumer usage.
*
* Enqueue and dequeue operations can be done concurrently.
*/
typedef struct rte_ring *ring_mpmc_t;
static void ring_mpmc_name_to_mz_name(const char *name, char *ring_name)
{
int i = 0;
int max_len = ODP_QUEUE_NAME_LEN < RTE_RING_NAMESIZE ?
ODP_QUEUE_NAME_LEN : RTE_RING_NAMESIZE;
do {
snprintf(ring_name, max_len, "%d-mpmc-%s", i++, name);
ring_name[max_len - 1] = 0;
} while (rte_ring_lookup(ring_name) != NULL);
}
/* Initialize ring. Ring size must be a power of two. */
static inline ring_mpmc_t ring_mpmc_create(const char *name, uint32_t size)
{
struct rte_ring *rte_ring;
char ring_name[RTE_RING_NAMESIZE];
/* Ring name must be unique */
ring_mpmc_name_to_mz_name(name, ring_name);
rte_ring = rte_ring_create(ring_name, size, rte_socket_id(), 0);
if (rte_ring == NULL) {
ODP_ERR("Creating DPDK ring failed: %s\n",
rte_strerror(rte_errno));
return NULL;
}
return rte_ring;
}
/* Free all memory used by the ring. */
static inline void ring_mpmc_free(ring_mpmc_t ring)
{
rte_ring_free(ring);
}
/* Dequeue data from the ring head. Max_num is smaller than ring size.*/
static inline uint32_t ring_mpmc_deq_multi(ring_mpmc_t ring, void **data,
uint32_t max_num)
{
return rte_ring_mc_dequeue_burst(ring, data, max_num, NULL);
}
/* Enqueue data into the ring tail. Num_data is smaller than ring size. */
static inline uint32_t ring_mpmc_enq_multi(ring_mpmc_t ring, void **data,
uint32_t num_data)
{
return rte_ring_mp_enqueue_burst(ring, data, num_data, NULL);
}
/* Check if ring is empty */
static inline int ring_mpmc_is_empty(ring_mpmc_t ring)
{
return rte_ring_empty(ring);
}
#ifdef __cplusplus
}
#endif
#endif
|
