rte_ring_hts.h File Reference

#include <rte_ring_hts_elem_pvt.h>

Go to the source code of this file.

Functions
static __rte_always_inline unsigned int	rte_ring_mp_hts_enqueue_bulk_elem (struct rte_ring *r, const void *obj_table, unsigned int esize, unsigned int n, unsigned int *free_space)
static __rte_always_inline unsigned int	rte_ring_mc_hts_dequeue_bulk_elem (struct rte_ring *r, void *obj_table, unsigned int esize, unsigned int n, unsigned int *available)
static __rte_always_inline unsigned int	rte_ring_mp_hts_enqueue_burst_elem (struct rte_ring *r, const void *obj_table, unsigned int esize, unsigned int n, unsigned int *free_space)
static __rte_always_inline unsigned int	rte_ring_mc_hts_dequeue_burst_elem (struct rte_ring *r, void *obj_table, unsigned int esize, unsigned int n, unsigned int *available)
static __rte_always_inline unsigned int	rte_ring_mp_hts_enqueue_bulk (struct rte_ring *r, void *const *obj_table, unsigned int n, unsigned int *free_space)
static __rte_always_inline unsigned int	rte_ring_mc_hts_dequeue_bulk (struct rte_ring *r, void **obj_table, unsigned int n, unsigned int *available)
static __rte_always_inline unsigned int	rte_ring_mp_hts_enqueue_burst (struct rte_ring *r, void *const *obj_table, unsigned int n, unsigned int *free_space)
static __rte_always_inline unsigned int	rte_ring_mc_hts_dequeue_burst (struct rte_ring *r, void **obj_table, unsigned int n, unsigned int *available)

Detailed Description

It is not recommended to include this file directly. Please include <rte_ring.h> instead.

Contains functions for serialized, aka Head-Tail Sync (HTS) ring mode. In that mode enqueue/dequeue operation is fully serialized: at any given moment only one enqueue/dequeue operation can proceed. This is achieved by allowing a thread to proceed with changing head.value only when head.value == tail.value. Both head and tail values are updated atomically (as one 64-bit value). To achieve that 64-bit CAS is used by head update routine.

Definition in file rte_ring_hts.h.

Function Documentation

rte_ring_mp_hts_enqueue_bulk_elem()

static __rte_always_inline unsigned int rte_ring_mp_hts_enqueue_bulk_elem ( struct rte_ring *  r, const void *  obj_table, unsigned int  esize, unsigned int  n, unsigned int *  free_space  )

static

Enqueue several objects on the HTS ring (multi-producers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of objects.
esize	The size of ring element, in bytes. It must be a multiple of 4. This must be the same value used while creating the ring. Otherwise the results are undefined.
n	The number of objects to add in the ring from the obj_table.
free_space	if non-NULL, returns the amount of space in the ring after the enqueue operation has finished.

Returns

The number of objects enqueued, either 0 or n

Definition at line 53 of file rte_ring_hts.h.

rte_ring_mc_hts_dequeue_bulk_elem()

static __rte_always_inline unsigned int rte_ring_mc_hts_dequeue_bulk_elem ( struct rte_ring *  r, void *  obj_table, unsigned int  esize, unsigned int  n, unsigned int *  available  )

static

Dequeue several objects from an HTS ring (multi-consumers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of objects that will be filled.
esize	The size of ring element, in bytes. It must be a multiple of 4. This must be the same value used while creating the ring. Otherwise the results are undefined.
n	The number of objects to dequeue from the ring to the obj_table.
available	If non-NULL, returns the number of remaining ring entries after the dequeue has finished.

Returns

The number of objects dequeued, either 0 or n

Definition at line 80 of file rte_ring_hts.h.

rte_ring_mp_hts_enqueue_burst_elem()

static __rte_always_inline unsigned int rte_ring_mp_hts_enqueue_burst_elem ( struct rte_ring *  r, const void *  obj_table, unsigned int  esize, unsigned int  n, unsigned int *  free_space  )

static

Enqueue several objects on the HTS ring (multi-producers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of objects.
esize	The size of ring element, in bytes. It must be a multiple of 4. This must be the same value used while creating the ring. Otherwise the results are undefined.
n	The number of objects to add in the ring from the obj_table.
free_space	if non-NULL, returns the amount of space in the ring after the enqueue operation has finished.

Returns

• n: Actual number of objects enqueued.

Definition at line 107 of file rte_ring_hts.h.

rte_ring_mc_hts_dequeue_burst_elem()

static __rte_always_inline unsigned int rte_ring_mc_hts_dequeue_burst_elem ( struct rte_ring *  r, void *  obj_table, unsigned int  esize, unsigned int  n, unsigned int *  available  )

static

Dequeue several objects from an HTS ring (multi-consumers safe). When the requested objects are more than the available objects, only dequeue the actual number of objects.

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of objects that will be filled.
esize	The size of ring element, in bytes. It must be a multiple of 4. This must be the same value used while creating the ring. Otherwise the results are undefined.
n	The number of objects to dequeue from the ring to the obj_table.
available	If non-NULL, returns the number of remaining ring entries after the dequeue has finished.

Returns

• n: Actual number of objects dequeued, 0 if ring is empty

Definition at line 136 of file rte_ring_hts.h.

rte_ring_mp_hts_enqueue_bulk()

static __rte_always_inline unsigned int rte_ring_mp_hts_enqueue_bulk ( struct rte_ring *  r, void *const *  obj_table, unsigned int  n, unsigned int *  free_space  )

static

Enqueue several objects on the HTS ring (multi-producers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of void * pointers (objects).
n	The number of objects to add in the ring from the obj_table.
free_space	if non-NULL, returns the amount of space in the ring after the enqueue operation has finished.

Returns

The number of objects enqueued, either 0 or n

Definition at line 159 of file rte_ring_hts.h.

rte_ring_mc_hts_dequeue_bulk()

static __rte_always_inline unsigned int rte_ring_mc_hts_dequeue_bulk ( struct rte_ring *  r, void **  obj_table, unsigned int  n, unsigned int *  available  )

static

Dequeue several objects from an HTS ring (multi-consumers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of void * pointers (objects) that will be filled.
n	The number of objects to dequeue from the ring to the obj_table.
available	If non-NULL, returns the number of remaining ring entries after the dequeue has finished.

Returns

The number of objects dequeued, either 0 or n

Definition at line 182 of file rte_ring_hts.h.

rte_ring_mp_hts_enqueue_burst()

static __rte_always_inline unsigned int rte_ring_mp_hts_enqueue_burst ( struct rte_ring *  r, void *const *  obj_table, unsigned int  n, unsigned int *  free_space  )

static

Enqueue several objects on the HTS ring (multi-producers safe).

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of void * pointers (objects).
n	The number of objects to add in the ring from the obj_table.
free_space	if non-NULL, returns the amount of space in the ring after the enqueue operation has finished.

Returns

• n: Actual number of objects enqueued.

Definition at line 205 of file rte_ring_hts.h.

rte_ring_mc_hts_dequeue_burst()

static __rte_always_inline unsigned int rte_ring_mc_hts_dequeue_burst ( struct rte_ring *  r, void **  obj_table, unsigned int  n, unsigned int *  available  )

static

Dequeue several objects from an HTS ring (multi-consumers safe). When the requested objects are more than the available objects, only dequeue the actual number of objects.

Parameters

r	A pointer to the ring structure.
obj_table	A pointer to a table of void * pointers (objects) that will be filled.
n	The number of objects to dequeue from the ring to the obj_table.
available	If non-NULL, returns the number of remaining ring entries after the dequeue has finished.

Returns

• n: Actual number of objects dequeued, 0 if ring is empty

Definition at line 230 of file rte_ring_hts.h.