05861b929d
system backends which operate purely based on paths, push out more path management into the library and make path management more abstract: enable a file system to define a bunch of path management callbacks, which are used by the framework. Management of normal /this/is/a/path type paths is provided by the library.
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* $NetBSD: pnode.c,v 1.3 2007/01/15 00:39:02 pooka Exp $ */
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/*
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* Copyright (c) 2006 Antti Kantee. 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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* 3. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* 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 OR
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* 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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#include <sys/cdefs.h>
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#if !defined(lint)
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__RCSID("$NetBSD: pnode.c,v 1.3 2007/01/15 00:39:02 pooka Exp $");
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#endif /* !lint */
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#include <sys/types.h>
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#include <assert.h>
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#include <puffs.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "puffs_priv.h"
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/*
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* Well, you're probably wondering why this isn't optimized.
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* The reason is simple: my available time is not optimized for
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* size ... so please be patient ;)
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*/
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struct puffs_node *
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puffs_pn_new(struct puffs_usermount *pu, void *privdata)
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{
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struct puffs_node *pn;
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pn = calloc(1, sizeof(struct puffs_node));
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if (pn == NULL)
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return NULL;
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pn->pn_data = privdata;
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pn->pn_mnt = pu;
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puffs_vattr_null(&pn->pn_va);
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LIST_INSERT_HEAD(&pu->pu_pnodelst, pn, pn_entries);
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return pn;
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}
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void
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puffs_pn_put(struct puffs_node *pn)
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{
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struct puffs_usermount *pu = pn->pn_mnt;
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/* XXX: why's this here? */
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if (pn == NULL)
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return;
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pu->pu_pathfree(pu, &pn->pn_po);
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LIST_REMOVE(pn, pn_entries);
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free(pn);
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}
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/* walk list, rv can be used either to halt or to return a value */
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void *
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puffs_pn_nodewalk(struct puffs_usermount *pu, puffs_nodewalk_fn fn, void *arg)
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{
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struct puffs_node *pn_cur, *pn_next;
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void *rv;
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pn_cur = LIST_FIRST(&pu->pu_pnodelst);
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while (pn_cur) {
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pn_next = LIST_NEXT(pn_cur, pn_entries);
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rv = fn(pu, pn_cur, arg);
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if (rv)
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return rv;
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pn_cur = pn_next;
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}
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return NULL;
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}
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