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Diffstat (limited to 'module/zfs/include/sys/refcount.h')
-rw-r--r-- | module/zfs/include/sys/refcount.h | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/module/zfs/include/sys/refcount.h b/module/zfs/include/sys/refcount.h deleted file mode 100644 index 1752c64e3..000000000 --- a/module/zfs/include/sys/refcount.h +++ /dev/null @@ -1,107 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - */ - -#ifndef _SYS_REFCOUNT_H -#define _SYS_REFCOUNT_H - -#include <sys/inttypes.h> -#include <sys/list.h> -#include <sys/zfs_context.h> - -#ifdef __cplusplus -extern "C" { -#endif - -/* - * If the reference is held only by the calling function and not any - * particular object, use FTAG (which is a string) for the holder_tag. - * Otherwise, use the object that holds the reference. - */ -#define FTAG ((char *)__func__) - -#ifdef ZFS_DEBUG -typedef struct reference { - list_node_t ref_link; - void *ref_holder; - uint64_t ref_number; - uint8_t *ref_removed; -} reference_t; - -typedef struct refcount { - kmutex_t rc_mtx; - list_t rc_list; - list_t rc_removed; - int64_t rc_count; - int64_t rc_removed_count; -} refcount_t; - -/* Note: refcount_t must be initialized with refcount_create() */ - -void refcount_create(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_count(refcount_t *rc); -int64_t refcount_add(refcount_t *rc, void *holder_tag); -int64_t refcount_remove(refcount_t *rc, void *holder_tag); -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_init(void); -void refcount_fini(void); - -#else /* ZFS_DEBUG */ - -typedef struct refcount { - uint64_t rc_count; -} refcount_t; - -#define refcount_create(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 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 refcount_add_many(rc, number, holder) \ - atomic_add_64_nv(&(rc)->rc_count, number) -#define refcount_remove_many(rc, number, holder) \ - atomic_add_64_nv(&(rc)->rc_count, -number) -#define refcount_transfer(dst, src) { \ - uint64_t __tmp = (src)->rc_count; \ - atomic_add_64(&(src)->rc_count, -__tmp); \ - atomic_add_64(&(dst)->rc_count, __tmp); \ -} - -#define refcount_init() -#define refcount_fini() - -#endif /* ZFS_DEBUG */ - -#ifdef __cplusplus -} -#endif - -#endif /* _SYS_REFCOUNT_H */ |