/*
- * 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) = (IOSharedLockData)0)
-
-#ifndef KERNEL
-extern void IOSpinLock(IOSharedLock l);
-#endif
+#include <libkern/OSAtomic.h>
-extern void IOSpinUnlock(IOSharedLock l);
-extern boolean_t IOTrySpinLock(IOSharedLock l);
+#define IOSharedLockData OSSpinLock
+#define ev_lock_data_t OSSpinLock
-/* 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!
+#ifdef KERNEL
+#define ev_unlock(l) OSSpinLockUnlock(l)
+#define ev_try_lock(l) OSSpinLockTry(l)
#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 */
projects / apple / xnu.git / blobdiff