diff options
Diffstat (limited to 'ubuntu/aufs/spl.h')
| -rw-r--r-- | ubuntu/aufs/spl.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/ubuntu/aufs/spl.h b/ubuntu/aufs/spl.h new file mode 100644 index 000000000000..743a3076207c --- /dev/null +++ b/ubuntu/aufs/spl.h @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2005-2012 Junjiro R. Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * simple list protected by a spinlock + */ + +#ifndef __AUFS_SPL_H__ +#define __AUFS_SPL_H__ + +#ifdef __KERNEL__ + +struct au_splhead { + spinlock_t spin; + struct list_head head; +}; + +static inline void au_spl_init(struct au_splhead *spl) +{ + spin_lock_init(&spl->spin); + INIT_LIST_HEAD(&spl->head); +} + +static inline void au_spl_add(struct list_head *list, struct au_splhead *spl) +{ + spin_lock(&spl->spin); + list_add(list, &spl->head); + spin_unlock(&spl->spin); +} + +static inline void au_spl_del(struct list_head *list, struct au_splhead *spl) +{ + spin_lock(&spl->spin); + list_del(list); + spin_unlock(&spl->spin); +} + +static inline void au_spl_del_rcu(struct list_head *list, + struct au_splhead *spl) +{ + spin_lock(&spl->spin); + list_del_rcu(list); + spin_unlock(&spl->spin); +} + +#endif /* __KERNEL__ */ +#endif /* __AUFS_SPL_H__ */ |