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/*
* Copyright (c) 2014 Richard Braun.
*
* This program 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _KERN_SREF_I_H
#define _KERN_SREF_I_H
#include <kern/spinlock.h>
#include <kern/work.h>
#define SREF_QUEUED 0x1
#define SREF_DIRTY 0x2
/*
* Scalable reference counter.
*
* It's tempting to merge the flags into the next member, but since they're
* not protected by the same lock, store them separately.
*/
struct sref_counter {
sref_noref_fn_t noref_fn;
union {
struct {
struct sref_counter *next;
struct spinlock lock;
int flags;
unsigned long value;
};
struct work work;
};
};
#endif /* _KERN_SREF_I_H */
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