xnu-1699.26.8.tar.gz

[apple/xnu.git] / osfmk / i386 / lock.h

diff --git a/osfmk/i386/lock.h b/osfmk/i386/lock.h
index 1f11129e74b1514c2e8651b6794fa87b7cb51384..d353be3c70bbd498b15b2957c8d86f389509f69f 100644 (file)
--- a/osfmk/i386/lock.h
+++ b/osfmk/i386/lock.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
  * 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@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (C) 1998 Apple Computer
@@ -77,19 +83,10 @@
 #include <mach_rt.h>
 #include <mach_ldebug.h>
 
-typedef struct {
-       lck_mtx_t       lck_mtx;        /* inlined lck_mtx, need to be first */
-#if     MACH_LDEBUG     
-       int                             type;
-#define MUTEX_TAG       0x4d4d
-       vm_offset_t             pc;
-       vm_offset_t             thread;
-#endif  /* MACH_LDEBUG */
-} mutex_t;
-
 typedef lck_rw_t lock_t;
 
-extern unsigned int LockTimeOut;                       /* Number of hardware ticks of a lock timeout */
+extern unsigned int LockTimeOutTSC;    /* Lock timeout in TSC ticks */
+extern unsigned int LockTimeOut;       /* Lock timeout in absolute time */ 
 
 
 #if defined(__GNUC__)
@@ -133,15 +130,6 @@ extern unsigned int LockTimeOut;                   /* Number of hardware ticks of a lock timeout
                                                                :       \
                        "r" (bit), "m" (*(volatile int *)(l)));
 
-static inline unsigned long i_bit_isset(unsigned int test, volatile unsigned long *word)
-{
-       int     bit;
-
-       __asm__ volatile("btl %2,%1\n\tsbbl %0,%0" : "=r" (bit)
-               : "m" (word), "ir" (test));
-       return bit;
-}
-
 static inline char     xchgb(volatile char * cp, char new);
 
 static inline void     atomic_incl(volatile long * p, long delta);
@@ -170,31 +158,10 @@ static inline char        xchgb(volatile char * cp, char new)
        return (old);
 }
 
-/*
- * Compare and exchange:
- * - returns failure (0) if the location did not contain the old value,
- * - returns success (1) if the location was set to the new value.
- */
-static inline uint32_t
-atomic_cmpxchg(uint32_t *p, uint32_t old, uint32_t new)
-{
-       uint32_t res = old;
-
-       asm volatile(
-               "lock;  cmpxchgl        %1,%2;  \n\t"
-               "       setz            %%al;   \n\t"
-               "       movzbl          %%al,%0"
-               : "+a" (res)    /* %0: old value to compare, returns success */
-               : "r" (new),    /* %1: new value to set */
-                 "m" (*(p))    /* %2: memory address */
-               : "memory");
-       return (res);
-}
-
 static inline void     atomic_incl(volatile long * p, long delta)
 {
        __asm__ volatile ("     lock            \n              \
-                               addl    %0,%1"          :       \
+                               add    %0,%1"           :       \
                                                        :       \
                                "r" (delta), "m" (*(volatile long *)p));
 }
@@ -218,7 +185,7 @@ static inline void  atomic_incb(volatile char * p, char delta)
 static inline void     atomic_decl(volatile long * p, long delta)
 {
        __asm__ volatile ("     lock            \n              \
-                               subl    %0,%1"          :       \
+                               sub             %0,%1"          :       \
                                                        :       \
                                "r" (delta), "m" (*(volatile long *)p));
 }
@@ -226,9 +193,9 @@ static inline void  atomic_decl(volatile long * p, long delta)
 static inline int      atomic_decl_and_test(volatile long * p, long delta)
 {
        uint8_t ret;
-       asm volatile (
+       __asm__ volatile (
                "       lock            \n\t"
-               "       subl    %1,%2   \n\t"
+               "       sub             %1,%2   \n\t"
                "       sete    %0"
                : "=qm" (ret)
                : "r" (delta), "m" (*(volatile long *)p));