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115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/* NFSv4.1 client for Windows
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* Copyright © 2012 The Regents of the University of Michigan
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*
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* Olga Kornievskaia <aglo@umich.edu>
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* Casey Bodley <cbodley@umich.edu>
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* without any warranty; without even the implied warranty of merchantability
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* or fitness for a particular purpose. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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*/
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#ifndef NFS41_LIST_H
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#define NFS41_LIST_H
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/* doubly-linked list */
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struct list_entry {
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struct list_entry *prev;
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struct list_entry *next;
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};
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#define list_container(entry, type, field) \
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((type*)((const char*)(entry) - (const char*)(&((type*)0)->field)))
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#define list_for_each(entry, head) \
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for (entry = (head)->next; entry != (head); entry = entry->next)
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#define list_for_each_tmp(entry, tmp, head) \
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for (entry = (head)->next, tmp = entry->next; entry != (head); \
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entry = tmp, tmp = entry->next)
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#define list_for_each_reverse(entry, head) \
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for (entry = (head)->prev; entry != (head); entry = entry->prev)
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#define list_for_each_reverse_tmp(entry, tmp, head) \
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for (entry = (head)->next, tmp = entry->next; entry != (head); \
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entry = tmp, tmp = entry->next)
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static void list_init(
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struct list_entry *head)
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{
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head->prev = head;
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head->next = head;
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}
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static int list_empty(
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struct list_entry *head)
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{
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return head->next == head;
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}
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static void list_add(
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struct list_entry *entry,
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struct list_entry *prev,
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struct list_entry *next)
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{
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/* assert(prev->next == next && next->prev == prev); */
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entry->prev = prev;
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entry->next = next;
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prev->next = entry;
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next->prev = entry;
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}
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static void list_add_head(
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struct list_entry *head,
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struct list_entry *entry)
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{
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list_add(entry, head, head->next);
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}
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static void list_add_tail(
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struct list_entry *head,
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struct list_entry *entry)
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{
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list_add(entry, head->prev, head);
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}
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static void list_remove(
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struct list_entry *entry)
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{
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if (!list_empty(entry)) {
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entry->next->prev = entry->prev;
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entry->prev->next = entry->next;
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list_init(entry);
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}
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}
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typedef int (*list_compare_fn)(const struct list_entry*, const void*);
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static struct list_entry* list_search(
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const struct list_entry *head,
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const void *value,
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list_compare_fn compare)
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{
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struct list_entry *entry;
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list_for_each(entry, head)
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if (compare(entry, value) == 0)
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return entry;
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return NULL;
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}
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#endif /* !NFS41_LIST_H */
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