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