xnu-1699.24.8.tar.gz

[apple/xnu.git] / bsd / sys / lockf.h

diff --git a/bsd/sys/lockf.h b/bsd/sys/lockf.h
index 23d50a18532c4175e083b1ccc15ab0356755f6dc..ffa77957356febb00624fe6d29dac5ba3b1b6b08 100644 (file)
--- a/bsd/sys/lockf.h
+++ b/bsd/sys/lockf.h
@@ -1,14 +1,19 @@
 /*
- * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -18,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (c) 1991, 1993
@@ -71,14 +76,13 @@ MALLOC_DECLARE(M_LOCKF);
 /*
  * The lockf structure is a kernel structure which contains the information
  * associated with a byte range lock.  The lockf structures are linked into
- * the inode structure. Locks are sorted by the starting byte of the lock for
- * efficiency.
+ * the vnode structure.  Locks are sorted by the starting byte of the lock for
+ * efficiency after they have been committed; uncommitted locks are on the list
+ * head so they may quickly be accessed, and are both short lived and transient.
  */
 TAILQ_HEAD(locklist, lockf);
 
-#if __DARWIN_ALIGN_POWER
-#pragma options align=power
-#endif
+#pragma pack(4)
 
 struct lockf {
        short   lf_flags;           /* Semantics: F_POSIX, F_FLOCK, F_WAIT */
@@ -93,21 +97,23 @@ struct lockf {
        TAILQ_ENTRY(lockf) lf_block;/* A request waiting for a lock */
 };
 
-#if __DARWIN_ALIGN_POWER
-#pragma options align=reset
-#endif
+#pragma pack()
 
 /* Maximum length of sleep chains to traverse to try and detect deadlock. */
 #define MAXDEPTH 50
 
 __BEGIN_DECLS
 
-int     lf_advlock(struct vnop_advlock_args *);
+#ifdef KERNEL_PRIVATE
+int    lf_advlock(struct vnop_advlock_args *);
+int    lf_assert(struct vnop_advlock_args *, void **);
+void   lf_commit(void *, int);
 
 #ifdef LOCKF_DEBUG
 void   lf_print(char *, struct lockf *);
 void   lf_printlist(char *, struct lockf *);
 #endif
+#endif /* KERNEL_PRIVATE */
 
 __END_DECLS