*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
*/
#ifndef _SYS_REFCOUNT_H
boolean_t rc_tracked;
list_t rc_list;
list_t rc_removed;
- int64_t rc_count;
- int64_t rc_removed_count;
+ uint64_t rc_count;
+ uint64_t rc_removed_count;
} zfs_refcount_t;
/* Note: refcount_t must be initialized with refcount_create[_untracked]() */
void refcount_create(refcount_t *rc);
void refcount_create_untracked(refcount_t *rc);
+void refcount_create_tracked(refcount_t *rc);
void refcount_destroy(refcount_t *rc);
void refcount_destroy_many(refcount_t *rc, uint64_t number);
int refcount_is_zero(refcount_t *rc);
int64_t refcount_add_many(refcount_t *rc, uint64_t number, void *holder_tag);
int64_t refcount_remove_many(refcount_t *rc, uint64_t number, void *holder_tag);
void refcount_transfer(refcount_t *dst, refcount_t *src);
+void refcount_transfer_ownership(refcount_t *, void *, void *);
+boolean_t refcount_held(refcount_t *, void *);
+boolean_t refcount_not_held(refcount_t *, void *);
void refcount_init(void);
void refcount_fini(void);
#define refcount_create(rc) ((rc)->rc_count = 0)
#define refcount_create_untracked(rc) ((rc)->rc_count = 0)
+#define refcount_create_tracked(rc) ((rc)->rc_count = 0)
#define refcount_destroy(rc) ((rc)->rc_count = 0)
#define refcount_destroy_many(rc, number) ((rc)->rc_count = 0)
#define refcount_is_zero(rc) ((rc)->rc_count == 0)
#define refcount_count(rc) ((rc)->rc_count)
-#define zfs_refcount_add(rc, holder) atomic_add_64_nv(&(rc)->rc_count, 1)
-#define refcount_remove(rc, holder) atomic_add_64_nv(&(rc)->rc_count, -1)
+#define zfs_refcount_add(rc, holder) atomic_inc_64_nv(&(rc)->rc_count)
+#define refcount_remove(rc, holder) atomic_dec_64_nv(&(rc)->rc_count)
#define refcount_add_many(rc, number, holder) \
atomic_add_64_nv(&(rc)->rc_count, number)
#define refcount_remove_many(rc, number, holder) \
atomic_add_64(&(src)->rc_count, -__tmp); \
atomic_add_64(&(dst)->rc_count, __tmp); \
}
+#define refcount_transfer_ownership(rc, current_holder, new_holder) (void)0
+#define refcount_held(rc, holder) ((rc)->rc_count > 0)
+#define refcount_not_held(rc, holder) (B_TRUE)
#define refcount_init()
#define refcount_fini()