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  4. rte_ring_core.h(3)

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rte_ring_core.h(3) DPDK rte_ring_core.h(3)

NAME

rte_ring_core.h

SYNOPSIS

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <rte_common.h>
#include <rte_config.h>
#include <rte_memory.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_memzone.h>
#include <rte_pause.h>
#include <rte_debug.h>

Data Structures


struct rte_ring_headtail
struct rte_ring

Macros


#define RTE_RING_NAMESIZE
#define RING_F_SP_ENQ 0x0001
#define RING_F_SC_DEQ 0x0002
#define RING_F_EXACT_SZ 0x0004
#define RTE_RING_SZ_MASK (0x7fffffffU)
#define RING_F_MP_RTS_ENQ 0x0008
#define RING_F_MC_RTS_DEQ 0x0010
#define RING_F_MP_HTS_ENQ 0x0020
#define RING_F_MC_HTS_DEQ 0x0040

Enumerations


enum rte_ring_queue_behavior { RTE_RING_QUEUE_FIXED = 0, RTE_RING_QUEUE_VARIABLE }
enum rte_ring_sync_type { RTE_RING_SYNC_MT, RTE_RING_SYNC_ST, RTE_RING_SYNC_MT_RTS, RTE_RING_SYNC_MT_HTS }

Detailed Description

This file contains definition of RTE ring structure itself, init flags and some related macros. For majority of DPDK entities, it is not recommended to include this file directly, use include <rte_ring.h> or <rte_ring_elem.h> instead.

Definition in file rte_ring_core.h.

Macro Definition Documentation

#define RTE_RING_NAMESIZE

Value:

(RTE_MEMZONE_NAMESIZE -                sizeof(RTE_RING_MZ_PREFIX) + 1)
The maximum length of a ring name.

Definition at line 52 of file rte_ring_core.h.

#define RING_F_SP_ENQ 0x0001

The default enqueue is 'single-producer'.

Definition at line 150 of file rte_ring_core.h.

#define RING_F_SC_DEQ 0x0002

The default dequeue is 'single-consumer'.

Definition at line 151 of file rte_ring_core.h.

#define RING_F_EXACT_SZ 0x0004

Ring is to hold exactly requested number of entries. Without this flag set, the ring size requested must be a power of 2, and the usable space will be that size - 1. With the flag, the requested size will be rounded up to the next power of two, but the usable space will be exactly that requested. Worst case, if a power-of-2 size is requested, half the ring space will be wasted.

Definition at line 160 of file rte_ring_core.h.

#define RTE_RING_SZ_MASK (0x7fffffffU)

Ring size mask

Definition at line 161 of file rte_ring_core.h.

#define RING_F_MP_RTS_ENQ 0x0008

The default enqueue is 'MP RTS'.

Definition at line 163 of file rte_ring_core.h.

#define RING_F_MC_RTS_DEQ 0x0010

The default dequeue is 'MC RTS'.

Definition at line 164 of file rte_ring_core.h.

#define RING_F_MP_HTS_ENQ 0x0020

The default enqueue is 'MP HTS'.

Definition at line 166 of file rte_ring_core.h.

#define RING_F_MC_HTS_DEQ 0x0040

The default dequeue is 'MC HTS'.

Definition at line 167 of file rte_ring_core.h.

Enumeration Type Documentation

enum rte_ring_queue_behavior

enqueue/dequeue behavior types

Enumerator

Enq/Deq a fixed number of items from a ring
Enq/Deq as many items as possible from ring

Definition at line 43 of file rte_ring_core.h.

enum rte_ring_sync_type

prod/cons sync types

Enumerator

multi-thread safe (default mode)
single thread only
multi-thread relaxed tail sync
multi-thread head/tail sync

Definition at line 56 of file rte_ring_core.h.

Author

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Thu May 23 2024 Version 23.11.0