/*
* 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
* 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
#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__)
: \
"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)
{
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" : \
"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" : \
"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" : \
"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" : \
"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;
}
projects / apple / xnu.git / blobdiff