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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2013 EMC Corp.
* Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org>
* Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_PCTRIE_H_
#define _SYS_PCTRIE_H_
#include <sys/_pctrie.h>
#include <sys/_smr.h>
#ifdef _KERNEL
#define PCTRIE_DEFINE_SMR(name, type, field, allocfn, freefn, smr) \
PCTRIE_DEFINE(name, type, field, allocfn, freefn) \
\
static __inline struct type * \
name##_PCTRIE_LOOKUP_UNLOCKED(struct pctrie *ptree, uint64_t key) \
{ \
\
return name##_PCTRIE_VAL2PTR(pctrie_lookup_unlocked(ptree, \
key, (smr))); \
} \
#define PCTRIE_DEFINE(name, type, field, allocfn, freefn) \
\
CTASSERT(sizeof(((struct type *)0)->field) == sizeof(uint64_t)); \
/* \
* XXX This assert protects flag bits, it does not enforce natural \
* alignment. 32bit architectures do not naturally align 64bit fields. \
*/ \
CTASSERT((__offsetof(struct type, field) & (sizeof(uint32_t) - 1)) == 0); \
\
static __inline struct type * \
name##_PCTRIE_VAL2PTR(uint64_t *val) \
{ \
\
if (val == NULL) \
return (NULL); \
return (struct type *) \
((uintptr_t)val - __offsetof(struct type, field)); \
} \
\
static __inline uint64_t * \
name##_PCTRIE_PTR2VAL(struct type *ptr) \
{ \
\
return &ptr->field; \
} \
\
static __inline int \
name##_PCTRIE_INSERT(struct pctrie *ptree, struct type *ptr) \
{ \
\
return pctrie_insert(ptree, name##_PCTRIE_PTR2VAL(ptr), \
allocfn); \
} \
\
static __inline struct type * \
name##_PCTRIE_LOOKUP(struct pctrie *ptree, uint64_t key) \
{ \
\
return name##_PCTRIE_VAL2PTR(pctrie_lookup(ptree, key)); \
} \
\
static __inline __unused struct type * \
name##_PCTRIE_LOOKUP_LE(struct pctrie *ptree, uint64_t key) \
{ \
\
return name##_PCTRIE_VAL2PTR(pctrie_lookup_le(ptree, key)); \
} \
\
static __inline __unused struct type * \
name##_PCTRIE_LOOKUP_GE(struct pctrie *ptree, uint64_t key) \
{ \
\
return name##_PCTRIE_VAL2PTR(pctrie_lookup_ge(ptree, key)); \
} \
\
static __inline __unused void \
name##_PCTRIE_RECLAIM(struct pctrie *ptree) \
{ \
\
pctrie_reclaim_allnodes(ptree, freefn); \
} \
\
static __inline void \
name##_PCTRIE_REMOVE(struct pctrie *ptree, uint64_t key) \
{ \
\
pctrie_remove(ptree, key, freefn); \
}
typedef void *(*pctrie_alloc_t)(struct pctrie *ptree);
typedef void (*pctrie_free_t)(struct pctrie *ptree, void *node);
int pctrie_insert(struct pctrie *ptree, uint64_t *val,
pctrie_alloc_t allocfn);
uint64_t *pctrie_lookup(struct pctrie *ptree, uint64_t key);
uint64_t *pctrie_lookup_ge(struct pctrie *ptree, uint64_t key);
uint64_t *pctrie_lookup_le(struct pctrie *ptree, uint64_t key);
uint64_t *pctrie_lookup_unlocked(struct pctrie *ptree, uint64_t key,
smr_t smr);
void pctrie_reclaim_allnodes(struct pctrie *ptree,
pctrie_free_t freefn);
void pctrie_remove(struct pctrie *ptree, uint64_t key,
pctrie_free_t freefn);
size_t pctrie_node_size(void);
int pctrie_zone_init(void *mem, int size, int flags);
static __inline void
pctrie_init(struct pctrie *ptree)
{
ptree->pt_root = 0;
}
static __inline bool
pctrie_is_empty(struct pctrie *ptree)
{
return (ptree->pt_root == 0);
}
/*
* These widths should allow the pointers to a node's children to fit within
* a single cache line. The extra levels from a narrow width should not be
* a problem thanks to path compression.
*/
#ifdef __LP64__
#define PCTRIE_WIDTH 4
#else
#define PCTRIE_WIDTH 3
#endif
#define PCTRIE_COUNT (1 << PCTRIE_WIDTH)
#endif /* _KERNEL */
#endif /* !_SYS_PCTRIE_H_ */
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