Release 4.12 include/linux/refcount.h

#ifndef _LINUX_REFCOUNT_H

#define _LINUX_REFCOUNT_H

#include <linux/atomic.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>

/**
 * refcount_t - variant of atomic_t specialized for reference counts
 * @refs: atomic_t counter field
 *
 * The counter saturates at UINT_MAX and will not move once
 * there. This avoids wrapping the counter and causing 'spurious'
 * use-after-free bugs.
 */

typedef struct refcount_struct {
	
atomic_t refs;

} refcount_t;


#define REFCOUNT_INIT(n)	{ .refs = ATOMIC_INIT(n), }

/**
 * refcount_set - set a refcount's value
 * @r: the refcount
 * @n: value to which the refcount will be set
 */


static inline void refcount_set(refcount_t *r, unsigned int n)
{
	atomic_set(&r->refs, n);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
25
100.00%
1
100.00%
Total
25
100.00%
1
100.00%

/**
 * refcount_read - get a refcount's value
 * @r: the refcount
 *
 * Return: the refcount's value
 */


static inline unsigned int refcount_read(const refcount_t *r)
{
	return atomic_read(&r->refs);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%

extern __must_check bool refcount_add_not_zero(unsigned int i, refcount_t *r);
extern void refcount_add(unsigned int i, refcount_t *r);

extern __must_check bool refcount_inc_not_zero(refcount_t *r);
extern void refcount_inc(refcount_t *r);

extern __must_check bool refcount_sub_and_test(unsigned int i, refcount_t *r);
extern void refcount_sub(unsigned int i, refcount_t *r);

extern __must_check bool refcount_dec_and_test(refcount_t *r);
extern void refcount_dec(refcount_t *r);

extern __must_check bool refcount_dec_if_one(refcount_t *r);
extern __must_check bool refcount_dec_not_one(refcount_t *r);
extern __must_check bool refcount_dec_and_mutex_lock(refcount_t *r, struct mutex *lock);
extern __must_check bool refcount_dec_and_lock(refcount_t *r, spinlock_t *lock);

#endif /* _LINUX_REFCOUNT_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
223
97.38%
2
50.00%
Elena Reshetova
3
1.31%
1
25.00%
David Windsor
3
1.31%
1
25.00%
Total
229
100.00%
4
100.00%
Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.