X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..a39ff7e25e19b3a8c3020042a3872ca9ec9659f1:/osfmk/i386/lock.h diff --git a/osfmk/i386/lock.h b/osfmk/i386/lock.h index 9df7f1320..935742195 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 @@ -64,291 +69,7 @@ #ifndef _I386_LOCK_H_ #define _I386_LOCK_H_ -#include - -#ifdef __APPLE_API_PRIVATE - -#ifdef MACH_KERNEL_PRIVATE - -#include -#include -#include -#include - -#include -#include - -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 */ - - -#if defined(__GNUC__) - -/* - * General bit-lock routines. - */ - -#define bit_lock(bit,l) \ - __asm__ volatile(" jmp 1f \n \ - 0: btl %0, %1 \n \ - jb 0b \n \ - 1: lock \n \ - btsl %0,%1 \n \ - jb 0b" : \ - : \ - "r" (bit), "m" (*(volatile int *)(l)) : \ - "memory"); - -#define bit_unlock(bit,l) \ - __asm__ volatile(" lock \n \ - btrl %0,%1" : \ - : \ - "r" (bit), "m" (*(volatile int *)(l))); - -/* - * Set or clear individual bits in a long word. - * The locked access is needed only to lock access - * to the word, not to individual bits. - */ - -#define i_bit_set(bit,l) \ - __asm__ volatile(" lock \n \ - btsl %0,%1" : \ - : \ - "r" (bit), "m" (*(volatile int *)(l))); - -#define i_bit_clear(bit,l) \ - __asm__ volatile(" lock \n \ - btrl %0,%1" : \ - : \ - "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_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 long atomic_getl(long * p); -static inline short atomic_gets(short * p); -static inline char atomic_getb(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 char xchgb(volatile char * cp, char new) -{ - register char old = new; - - __asm__ volatile (" xchgb %0,%2" : - "=q" (old) : - "0" (new), "m" (*(volatile char *)cp) : "memory"); - 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) -{ - __asm__ volatile (" lock \n \ - addl %0,%1" : \ - : \ - "r" (delta), "m" (*(volatile long *)p)); -} - -static inline void atomic_incs(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) -{ - __asm__ volatile (" lock \n \ - addb %0,%1" : \ - : \ - "q" (delta), "m" (*(volatile char *)p)); -} - -static inline void atomic_decl(long * p, long delta) -{ - __asm__ volatile (" lock \n \ - subl %0,%1" : \ - : \ - "r" (delta), "m" (*(volatile long *)p)); -} - -static inline int atomic_decl_and_test(long * p, long delta) -{ - uint8_t ret; - asm volatile ( - " lock \n\t" - " subl %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) -{ - __asm__ volatile (" lock \n \ - subw %0,%1" : \ - : \ - "q" (delta), "m" (*(volatile short *)p)); -} - -static inline void atomic_decb(char * p, char delta) -{ - __asm__ volatile (" lock \n \ - subb %0,%1" : \ - : \ - "q" (delta), "m" (*(volatile char *)p)); -} - -static inline long atomic_getl(long * p) -{ - return (*p); -} - -static inline short atomic_gets(short * p) -{ - return (*p); -} - -static inline char atomic_getb(char * p) -{ - return (*p); -} - -static inline void atomic_setl(long * p, long value) -{ - *p = value; -} - -static inline void atomic_sets(short * p, short value) -{ - *p = value; -} - -static inline void atomic_setb(char * p, char value) -{ - *p = value; -} - - -#else /* !defined(__GNUC__) */ - -extern void i_bit_set( - int index, - void *addr); - -extern void i_bit_clear( - int index, - void *addr); - -extern void bit_lock( - int index, - void *addr); - -extern void bit_unlock( - int index, - void *addr); - -/* - * All other routines defined in __GNUC__ case lack - * definitions otherwise. - XXX - */ - -#endif /* !defined(__GNUC__) */ - -extern void kernel_preempt_check (void); - -#endif /* MACH_KERNEL_PRIVATE */ - -#endif /* __APLE_API_PRIVATE */ +#warning This header is deprecated. Use instead. #endif /* _I386_LOCK_H_ */