96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Copyright (c) 2018 naehrwert
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _LIST_H_
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#define _LIST_H_
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#include "types.h"
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/*! Initialize list. */
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#define LIST_INIT(name) link_t name = {&name, &name}
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/*! Initialize static list. */
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#define LIST_INIT_STATIC(name) static link_t name = {&name, &name}
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/*! Iterate over all list links. */
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#define LIST_FOREACH(iter, list) \
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for(link_t *iter = (list)->next; iter != (list); iter = iter->next)
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/*! Safely iterate over all list links. */
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#define LIST_FOREACH_SAFE(iter, list) \
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for(link_t *iter = (list)->next, *safe = iter->next; iter != (list); iter = safe, safe = iter->next)
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/*! Iterate over all list members. */
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#define LIST_FOREACH_ENTRY(etype, iter, list, mn) \
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for(etype *iter = CONTAINER_OF((list)->next, etype, mn); &iter->mn != (list); iter = CONTAINER_OF(iter->mn.next, etype, mn))
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typedef struct _link_t
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{
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struct _link_t *prev;
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struct _link_t *next;
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} link_t;
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static inline void link_init(link_t *l)
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{
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l->prev = NULL;
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l->next = NULL;
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}
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static inline int link_used(link_t *l)
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{
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if(l->next == NULL)
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return 1;
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return 0;
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}
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static inline void list_init(link_t *lh)
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{
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lh->prev = lh;
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lh->next = lh;
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}
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static inline void list_prepend(link_t *lh, link_t *l)
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{
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l->next = lh->next;
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l->prev = lh;
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lh->next->prev = l;
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lh->next = l;
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}
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static inline void list_append(link_t *lh, link_t *l)
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{
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l->prev = lh->prev;
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l->next = lh;
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lh->prev->next = l;
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lh->prev = l;
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}
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static inline void list_remove(link_t *l)
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{
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l->next->prev = l->prev;
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l->prev->next = l->next;
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link_init(l);
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}
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static inline int list_empty(link_t *lh)
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{
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if(lh->next == lh)
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return 1;
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return 0;
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}
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#endif
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