112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* Copyright (C) 2005-2014 Junjiro R. Okajima
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*
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* This program, aufs 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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* simple list protected by a spinlock
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*/
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#ifndef __AUFS_SPL_H__
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#define __AUFS_SPL_H__
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#ifdef __KERNEL__
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struct au_splhead {
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spinlock_t spin;
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struct list_head head;
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};
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static inline void au_spl_init(struct au_splhead *spl)
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{
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spin_lock_init(&spl->spin);
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INIT_LIST_HEAD(&spl->head);
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}
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static inline void au_spl_add(struct list_head *list, struct au_splhead *spl)
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{
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spin_lock(&spl->spin);
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list_add(list, &spl->head);
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spin_unlock(&spl->spin);
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}
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static inline void au_spl_del(struct list_head *list, struct au_splhead *spl)
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{
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spin_lock(&spl->spin);
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list_del(list);
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spin_unlock(&spl->spin);
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}
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static inline void au_spl_del_rcu(struct list_head *list,
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struct au_splhead *spl)
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{
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spin_lock(&spl->spin);
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list_del_rcu(list);
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spin_unlock(&spl->spin);
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}
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/* ---------------------------------------------------------------------- */
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struct au_sphlhead {
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spinlock_t spin;
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struct hlist_head head;
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};
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static inline void au_sphl_init(struct au_sphlhead *sphl)
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{
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spin_lock_init(&sphl->spin);
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INIT_HLIST_HEAD(&sphl->head);
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}
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static inline void au_sphl_add(struct hlist_node *hlist,
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struct au_sphlhead *sphl)
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{
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spin_lock(&sphl->spin);
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hlist_add_head(hlist, &sphl->head);
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spin_unlock(&sphl->spin);
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}
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static inline void au_sphl_del(struct hlist_node *hlist,
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struct au_sphlhead *sphl)
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{
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spin_lock(&sphl->spin);
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hlist_del(hlist);
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spin_unlock(&sphl->spin);
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}
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static inline void au_sphl_del_rcu(struct hlist_node *hlist,
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struct au_sphlhead *sphl)
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{
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spin_lock(&sphl->spin);
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hlist_del_rcu(hlist);
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spin_unlock(&sphl->spin);
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}
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static inline unsigned long au_sphl_count(struct au_sphlhead *sphl)
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{
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unsigned long cnt;
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struct hlist_node *pos;
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cnt = 0;
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spin_lock(&sphl->spin);
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hlist_for_each(pos, &sphl->head)
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cnt++;
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spin_unlock(&sphl->spin);
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return cnt;
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}
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#endif /* __KERNEL__ */
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#endif /* __AUFS_SPL_H__ */
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