X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/de355530ae67247cbd0da700edb3a2a1dae884c2..a1c7dba18ef36983396c282fe85292db066e39db:/iokit/IOKit/IOSharedLock.h

diff --git a/iokit/IOKit/IOSharedLock.h b/iokit/IOKit/IOSharedLock.h
index 0f9e7bf33..795007451 100644
--- a/iokit/IOKit/IOSharedLock.h
+++ b/iokit/IOKit/IOSharedLock.h
@@ -1,80 +1,37 @@
 /*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2010 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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.
- */
 
 #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;
-
-#define IOSpinLockInit(l)	(*(l) = (IOSpinLockData)0)
-
-extern void IOSpinLock(IOSharedLock l);
-extern void IOSpinUnlock(IOSharedLock l);
-extern boolean_t IOTrySpinLock(IOSharedLock l);
+#include <libkern/OSAtomic.h>
 
-/* exact same stuff & implementation */
+#define IOSharedLockData OSSpinLock
+#define ev_lock_data_t   OSSpinLock
 
-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)
-
-extern void ev_lock(ev_lock_t l);		// Spin lock!
-extern void ev_unlock(ev_lock_t l);
-extern boolean_t ev_try_lock(ev_lock_t l);
-
-#ifdef __cplusplus
-}
+#ifdef KERNEL
+#define ev_unlock(l)     OSSpinLockUnlock(l)
+#define ev_try_lock(l)   OSSpinLockTry(l)
 #endif
+
 #endif /* ! _IOKIT_IOSHAREDLOCK_H */