X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Finclude%2Fsys%2Frefcount.h;h=1752c64e3e8be2dbc636dd7dcaa188526178780d;hb=054bc00b4c0c257f6baf6d7145b270c7283fe51e;hp=d3fe7b1f899c2a67db2e543e71cbe2e2ec8a01a5;hpb=172bb4bd5e4afef721dd4d2972d8680d983f144b;p=zfs.git

diff --git a/module/zfs/include/sys/refcount.h b/module/zfs/include/sys/refcount.h
index d3fe7b1..1752c64 100644
--- a/module/zfs/include/sys/refcount.h
+++ b/module/zfs/include/sys/refcount.h
@@ -19,15 +19,12 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #ifndef	_SYS_REFCOUNT_H
 #define	_SYS_REFCOUNT_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/inttypes.h>
 #include <sys/list.h>
 #include <sys/zfs_context.h>
@@ -43,7 +40,7 @@ extern "C" {
  */
 #define	FTAG ((char *)__func__)
 
-#if defined(DEBUG) || !defined(_KERNEL)
+#ifdef	ZFS_DEBUG
 typedef struct reference {
 	list_node_t ref_link;
 	void *ref_holder;
@@ -70,11 +67,12 @@ 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 /* DEBUG */
+#else	/* ZFS_DEBUG */
 
 typedef struct refcount {
 	uint64_t rc_count;
@@ -91,11 +89,16 @@ typedef struct refcount {
 	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 /* DEBUG */
+#endif	/* ZFS_DEBUG */
 
 #ifdef	__cplusplus
 }