X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/43866e378188c25dd1e2208016ab3cbeb086ae6c..7ee9d059c4eecf68ae4f8b0fb99ae2471eda79af:/iokit/Kernel/i386/IOSharedLock.s?ds=sidebyside

diff --git a/iokit/Kernel/i386/IOSharedLock.s b/iokit/Kernel/i386/IOSharedLock.s
index 58b50f4de..9360dce09 100644
--- a/iokit/Kernel/i386/IOSharedLock.s
+++ b/iokit/Kernel/i386/IOSharedLock.s
@@ -1,10 +1,8 @@
 /*
- * 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
@@ -22,5 +20,45 @@
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
-#include <IOKit/machine/IOSharedLockImp.h>
 
+#include <architecture/i386/asm_help.h>
+
+	TEXT
+
+/*
+ * void
+ * OSSpinLockUnlock(p)
+ *	int *p;
+ *
+ * Unlock the lock pointed to by p.
+ */
+
+LEAF(_OSSpinLockUnlock, 0)
+LEAF(_IOSpinUnlock, 0)
+LEAF(_ev_unlock, 0)
+	movl		4(%esp), %ecx
+	movl		$0, (%ecx)
+END(_OSSpinLockUnlock)
+
+
+/*
+ * int
+ * OSSpinLockTry(p)
+ *	int *p;
+ *
+ * Try to lock p.  Return zero if not successful.
+ */
+
+LEAF(_OSSpinLockTry, 0)
+LEAF(_IOTrySpinLock, 0)
+LEAF(_ev_try_lock, 0)
+        movl            4(%esp), %ecx 
+	xorl		%eax, %eax
+        lock
+        cmpxchgl        %ecx, (%ecx)
+	jne	1f
+	movl	$1, %eax		/* yes */
+	ret
+1:
+	xorl	%eax, %eax		/* no */
+END(_OSSpinLockTry)