xnu-6153.141.1.tar.gz

[apple/xnu.git] / iokit / IOKit / IOSharedLock.h

diff --git a/iokit/IOKit/IOSharedLock.h b/iokit/IOKit/IOSharedLock.h
index 0899e775fe7d2b895bef46b96dc54236d1c82ca6..195ad9fd2b9136367a793f2aaa30fd8ec3d2aa3b 100644 (file)
--- a/iokit/IOKit/IOSharedLock.h
+++ b/iokit/IOKit/IOSharedLock.h
@@ -1,17 +1,15 @@
 /*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2010 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
+ *
  * 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.
- * 
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -19,71 +17,21 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved. 
- *
- * HISTORY
- *
- */
-
-/*
- * Multiprocessor locks used within the shared memory area between the
- * kernel and event system.  These must work in both user and kernel mode.
- * 
- * These routines are public, for the purpose of writing frame buffer device
- * drivers which handle their own cursors.  Certain architectures define a
- * generic display class which handles cursor drawing and is subclassed by
- * driver writers.  These drivers need not be concerned with the following
- * types and definitions.
- *
- * The ev_lock(), ev_unlock(), and ev_try_lock() functions are available only
- * to drivers built in or dynamically loaded into the kernel, and to DPS
- * drivers built in or dynamically loaded into the Window Server.  They do not
- * exist in any shared library.
  *
- * --> They're now in IOKit user lib.
+ * @APPLE_LICENSE_HEADER_END@
  */
 
 #ifndef _IOKIT_IOSHAREDLOCK_H
 #define _IOKIT_IOSHAREDLOCK_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// should be 32 bytes on PPC
-typedef volatile int           IOSharedLockData;
-typedef IOSharedLockData    *   IOSharedLock;
+#include <libkern/OSAtomic.h>
 
-#define IOSpinLockInit(l)      (*(l) = (IOSharedLockData)0)
+#define IOSharedLockData OSSpinLock
+#define ev_lock_data_t   OSSpinLock
 
-#ifndef KERNEL
-extern void IOSpinLock(IOSharedLock l);
+#ifdef KERNEL
+#define ev_unlock(l)     OSSpinLockUnlock(l)
+#define ev_try_lock(l)   OSSpinLockTry(l)
 #endif
 
-extern void IOSpinUnlock(IOSharedLock l);
-extern boolean_t IOTrySpinLock(IOSharedLock l);
-
-/* exact same stuff & implementation */
-
-typedef IOSharedLockData       ev_lock_data_t;
-typedef ev_lock_data_t     *   ev_lock_t;
-
-#define ev_init_lock(l)                (*(l) = (ev_lock_data_t)0)
-// needs isync?
-//#define ev_is_locked(l)      (*(l) != (ev_lock_data_t)0)
-
-#ifndef KERNEL
-extern void ev_lock(ev_lock_t l);              // Spin lock!
-#endif
-
-extern void ev_unlock(ev_lock_t l);
-extern boolean_t ev_try_lock(ev_lock_t l);
-
-#ifdef __cplusplus
-}
-#endif
 #endif /* ! _IOKIT_IOSHAREDLOCK_H */