X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..7ddcb079202367355dddccdfa4318e57d50318be:/osfmk/i386/lock.h

diff --git a/osfmk/i386/lock.h b/osfmk/i386/lock.h
index 9df7f1320..d353be3c7 100644
--- a/osfmk/i386/lock.h
+++ b/osfmk/i386/lock.h
@@ -1,14 +1,19 @@
 /*
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * 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.
+ * 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.
+ * 
+ * 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
@@ -18,7 +23,7 @@
  * 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
@@ -78,27 +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 struct {
-	decl_simple_lock_data(,interlock) /* "hardware" interlock field */
-	volatile unsigned int
-		read_count:16,	/* No. of accepted readers */
-		want_upgrade:1,	/* Read-to-write upgrade waiting */
-		want_write:1,	/* Writer is waiting, or locked for write */ 
-		waiting:1,		/* Someone is sleeping on lock */
-	can_sleep:1;		/* Can attempts to lock go to sleep? */
-} lock_t;
-
-extern unsigned int LockTimeOut;			/* Number of hardware ticks of a lock timeout */
+typedef lck_rw_t lock_t;
+
+extern unsigned int LockTimeOutTSC;	/* Lock timeout in TSC ticks */
+extern unsigned int LockTimeOut;	/* Lock timeout in absolute time */ 
 
 
 #if defined(__GNUC__)
@@ -142,32 +130,23 @@ 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(long * p, long delta);
-static inline void	atomic_incs(short * p, short delta);
-static inline void	atomic_incb(char * p, char delta);
+static inline void	atomic_incl(volatile long * p, long delta);
+static inline void	atomic_incs(volatile short * p, short delta);
+static inline void	atomic_incb(volatile char * p, char delta);
 
-static inline void	atomic_decl(long * p, long delta);
-static inline void	atomic_decs(short * p, short delta);
-static inline void	atomic_decb(char * p, char delta);
+static inline void	atomic_decl(volatile long * p, long delta);
+static inline void	atomic_decs(volatile short * p, short delta);
+static inline void	atomic_decb(volatile char * p, char delta);
 
-static inline long	atomic_getl(long * p);
-static inline short	atomic_gets(short * p);
-static inline char	atomic_getb(char * p);
+static inline long	atomic_getl(const volatile long * p);
+static inline short	atomic_gets(const volatile short * p);
+static inline char	atomic_getb(const volatile char * p);
 
-static inline void	atomic_setl(long * p, long value);
-static inline void	atomic_sets(short * p, short value);
-static inline void	atomic_setb(char * p, char value);
+static inline void	atomic_setl(volatile long * p, long value);
+static inline void	atomic_sets(volatile short * p, short value);
+static inline void	atomic_setb(volatile char * p, char value);
 
 static inline char	xchgb(volatile char * cp, char new)
 {
@@ -179,64 +158,15 @@ 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 uint64_t
-atomic_load64(uint64_t *quadp)
-{
-	uint64_t ret;
-
-	asm volatile(
-		"	lock; cmpxchg8b	%1"
-		: "=A" (ret)
-		: "m" (*quadp), "a" (0), "d" (0), "b" (0), "c" (0));
-	return (ret);
-}
-
-static inline uint64_t
-atomic_loadstore64(uint64_t *quadp, uint64_t new)
-{
-	uint64_t ret;
-
-	ret = *quadp;
-	asm volatile(
-		"1:				\n\t"
-		"	lock; cmpxchg8b	%1	\n\t"
-		"	jnz	1b"
-		: "+A" (ret)
-		: "m" (*quadp),
-		  "b" ((uint32_t)new), "c" ((uint32_t)(new >> 32)));
-	return (ret);
-}
-
-static inline void	atomic_incl(long * p, long delta)
+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));
 }
 
-static inline void	atomic_incs(short * p, short delta)
+static inline void	atomic_incs(volatile short * p, short delta)
 {
 	__asm__ volatile ("	lock		\n		\
 				addw    %0,%1"		:	\
@@ -244,7 +174,7 @@ static inline void	atomic_incs(short * p, short delta)
 				"q" (delta), "m" (*(volatile short *)p));
 }
 
-static inline void	atomic_incb(char * p, char delta)
+static inline void	atomic_incb(volatile char * p, char delta)
 {
 	__asm__ volatile ("	lock		\n		\
 				addb    %0,%1"		:	\
@@ -252,27 +182,27 @@ static inline void	atomic_incb(char * p, char delta)
 				"q" (delta), "m" (*(volatile char *)p));
 }
 
-static inline void	atomic_decl(long * p, long 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));
 }
 
-static inline int	atomic_decl_and_test(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));
 	return ret;
 }
 
-static inline void	atomic_decs(short * p, short delta)
+static inline void	atomic_decs(volatile short * p, short delta)
 {
 	__asm__ volatile ("	lock		\n		\
 				subw    %0,%1"		:	\
@@ -280,7 +210,7 @@ static inline void	atomic_decs(short * p, short delta)
 				"q" (delta), "m" (*(volatile short *)p));
 }
 
-static inline void	atomic_decb(char * p, char delta)
+static inline void	atomic_decb(volatile char * p, char delta)
 {
 	__asm__ volatile ("	lock		\n		\
 				subb    %0,%1"		:	\
@@ -288,32 +218,32 @@ static inline void	atomic_decb(char * p, char delta)
 				"q" (delta), "m" (*(volatile char *)p));
 }
 
-static inline long	atomic_getl(long * p)
+static inline long	atomic_getl(const volatile long * p)
 {
 	return (*p);
 }
 
-static inline short	atomic_gets(short * p)
+static inline short	atomic_gets(const volatile short * p)
 {
 	return (*p);
 }
 
-static inline char	atomic_getb(char * p)
+static inline char	atomic_getb(const volatile char * p)
 {
 	return (*p);
 }
 
-static inline void	atomic_setl(long * p, long value)
+static inline void	atomic_setl(volatile long * p, long value)
 {
 	*p = value;
 }
 
-static inline void	atomic_sets(short * p, short value)
+static inline void	atomic_sets(volatile short * p, short value)
 {
 	*p = value;
 }
 
-static inline void	atomic_setb(char * p, char value)
+static inline void	atomic_setb(volatile char * p, char value)
 {
 	*p = value;
 }