/*
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* Copyright (C) 2007 Philippe Gerum <rpm@xenomai.org>.
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*
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* Xenomai is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _COBALT_KERNEL_MAP_H
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#define _COBALT_KERNEL_MAP_H
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#include <asm/bitsperlong.h>
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/**
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* @addtogroup cobalt_core_map
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* @{
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*/
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#define XNMAP_MAX_KEYS (BITS_PER_LONG * BITS_PER_LONG)
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struct xnmap {
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int nkeys;
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int ukeys;
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int offset;
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unsigned long himask;
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unsigned long himap;
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#define __IDMAP_LONGS ((XNMAP_MAX_KEYS+BITS_PER_LONG-1)/BITS_PER_LONG)
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unsigned long lomap[__IDMAP_LONGS];
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#undef __IDMAP_LONGS
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void *objarray[1];
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};
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struct xnmap *xnmap_create(int nkeys,
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int reserve,
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int offset);
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void xnmap_delete(struct xnmap *map);
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int xnmap_enter(struct xnmap *map,
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int key,
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void *objaddr);
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int xnmap_remove(struct xnmap *map,
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int key);
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static inline void *xnmap_fetch_nocheck(struct xnmap *map, int key)
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{
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int ofkey = key - map->offset;
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return map->objarray[ofkey];
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}
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static inline void *xnmap_fetch(struct xnmap *map, int key)
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{
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int ofkey = key - map->offset;
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if (ofkey < 0 || ofkey >= map->nkeys)
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return NULL;
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return map->objarray[ofkey];
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}
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/** @} */
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#endif /* !_COBALT_KERNEL_MAP_H */
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