xnu-792.tar.gz

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

diff --git a/bsd/sys/lockf.h b/bsd/sys/lockf.h
index 6461cea8e0afa8505feae094932e08356ec8ddff..7c3e814d02a95f0dac3fcd15ffefa32a0c57058a 100644 (file)
--- a/bsd/sys/lockf.h
+++ b/bsd/sys/lockf.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
@@ -19,7 +19,6 @@
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
-/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
 /*
  * Copyright (c) 1991, 1993
  *     The Regents of the University of California.  All rights reserved.
@@ -35,10 +34,6 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -56,59 +51,63 @@
  * SUCH DAMAGE.
  *
  *     @(#)lockf.h     8.1 (Berkeley) 6/11/93
+ * $FreeBSD: src/sys/sys/lockf.h,v 1.16 2004/04/07 04:19:49 imp Exp $
  */
 
 #ifndef _SYS_LOCKF_H_
 #define        _SYS_LOCKF_H_
 
-#include <sys/appleapiopts.h>
-#include <sys/cdefs.h> 
+#include <sys/queue.h>
+#include <sys/cdefs.h>
+
+struct vnop_advlock_args;
+struct vnode;
+
+#ifdef MALLOC_DECLARE
+MALLOC_DECLARE(M_LOCKF);
+#endif
 
-#ifdef __APPLE_API_PRIVATE
 /*
  * 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.
  */
+TAILQ_HEAD(locklist, lockf);
+
+#if __DARWIN_ALIGN_POWER
+#pragma options align=power
+#endif
+
 struct lockf {
-       short   lf_flags;        /* Lock semantics: F_POSIX, F_FLOCK, F_WAIT */
+       short   lf_flags;           /* Semantics: F_POSIX, F_FLOCK, F_WAIT */
        short   lf_type;         /* Lock type: F_RDLCK, F_WRLCK */
-       off_t   lf_start;        /* The byte # of the start of the lock */
-       off_t   lf_end;          /* The byte # of the end of the lock (-1=EOF)*/
-       caddr_t lf_id;           /* The id of the resource holding the lock */
-       struct  lockf **lf_head; /* Back pointer to the head of lockf list */
-       struct  lockf *lf_next;  /* A pointer to the next lock on this inode */
-       struct  lockf *lf_block; /* The list of blocked locks */
+       off_t   lf_start;           /* Byte # of the start of the lock */
+       off_t   lf_end;             /* Byte # of the end of the lock (-1=EOF) */
+       caddr_t lf_id;              /* Id of the resource holding the lock */
+       struct  lockf **lf_head;    /* Back pointer to the head of the locf list */
+       struct vnode *lf_vnode;     /* Back pointer to the inode */
+       struct  lockf *lf_next;     /* Pointer to the next lock on this inode */
+       struct  locklist lf_blkhd;  /* List of requests blocked on this lock */
+       TAILQ_ENTRY(lockf) lf_block;/* A request waiting for a lock */
 };
 
+#if __DARWIN_ALIGN_POWER
+#pragma options align=reset
+#endif
+
 /* Maximum length of sleep chains to traverse to try and detect deadlock. */
 #define MAXDEPTH 50
 
 __BEGIN_DECLS
-void    lf_addblock __P((struct lockf *, struct lockf *));
-int     lf_advlock __P((struct lockf **,
-           off_t, caddr_t, int, struct flock *, int));
-int     lf_clearlock __P((struct lockf *));
-int     lf_findoverlap __P((struct lockf *,
-           struct lockf *, int, struct lockf ***, struct lockf **));
-struct lockf *
-        lf_getblock __P((struct lockf *));
-int     lf_getlock __P((struct lockf *, struct flock *));
-int     lf_setlock __P((struct lockf *));
-void    lf_split __P((struct lockf *, struct lockf *));
-void    lf_wakelock __P((struct lockf *));
-__END_DECLS
 
-#if LOCKF_DEBUG
-extern int lockf_debug;
+int     lf_advlock(struct vnop_advlock_args *);
 
-__BEGIN_DECLS
-void   lf_print __P((char *, struct lockf *));
-void   lf_printlist __P((char *, struct lockf *));
-__END_DECLS
-#endif /* LOCKF_DEBUG */
+#ifdef LOCKF_DEBUG
+void   lf_print(char *, struct lockf *);
+void   lf_printlist(char *, struct lockf *);
+#endif
 
-#endif /* __APPLE_API_PRIVATE */
+__END_DECLS
 
 #endif /* !_SYS_LOCKF_H_ */